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Copur, Engin H. "Repetitive control for FES-based tremor suppression." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/419405/.
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Tremor is an involuntary, rhythmic movement of one or more body parts which prevents patients from performing activities of daily living (ADL), thereby greatly diminishing quality of life. Although there are various methods to suppress tremor, each is limited by either cost, ability to produce sufficient tremor suppression (TS) or interference with voluntary action. Functional electrical stimulation (FES) has attracted significant research attention as a novel approach for TS, and has substantial potential advantage in terms of cost, convenience and size. Results from previous studies have demonstrated that FES controlled by classical control methods is unable to produce satisfactory TS, while also producing intense interference with voluntary action. Thus their performance is inherently limited by the drawbacks of conventional feedback design. Since repetitive control (RC) is able to reject a periodic disturbance completely and tremor can be regarded as a periodic disturbance, RC may have more potential for TS than other classical feedback control techniques. This thesis thus provides the first thorough implementation and assessment of RC for TS by means of FES in order to establish its feasibility and performance advantages compared to the conventional filter techniques (FT) that have so far been employed. Due to the importance of the wrist joint in ADL, wrist movement in flexion/extension is targeted within this programme of research. First, simulations are performed using a previously validated linear model of tremulous wrist dynamics to evaluate the feasibility of applying linear RC for TS, and results show that RC is able to produce complete tremor suppression but incurs a severe interference with voluntary action. Since this linear model does not account for the critical properties of the dynamics and RC requires a reliable knowledge of the plant dynamics to guarantee the stability of RC and improve its performance, this thesis then proposes a nonlinear model structure with an identification procedure that maintains the balance between the accuracy and the needs of the clinical domain. Then a linearising control approach is undertaken to enable linear RC design and a mechanism is proposed to preserve the voluntary action which is restricted by applying RC. Analysis confirms that the proposed mechanism can significantly reduce the undesirable interference of RC with voluntary action. Finally, two separate experimental studies are conducted using a test platform. The former is performed to fix the order of the model components in advance to reduce the computational effort of the identification procedure. The response of the wrist joint to FES signals applied to the flexion/extension muscles of each participant is collected. Using these input/output data sets, different models are identified for a number of different orders. Then the fitting accuracies of all models with the same order are averaged and an order is selected with maintaining the balance between model accuracy and simplicity. The second experimental study is to confirm the higher potential of the proposed RC compared with FT for FES-based TS. A mechanical system is introduced to the existing test platform to induce tremor artificially since the participants are unimpaired. The participants are asked to complete three consecutive tests to examine the effect of induced tremor on the ability of patients to perform voluntary task, the capability of FES to suppress the induced tremor and the effect of FES on the voluntary motion. The results indicate that the proposed RC approach with the developed model identification procedure can suppress tremor more effectively than FT and leads to a minimal interference with voluntary motion. This research therefore has established the feasibility of RC for TS by validating the model accuracy, the identification procedure, and the control performance. It has therefore potential for future exploration to provide more effective solutions for patients.
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Fan, Chi-kit. "Design and analysis of agent-based FMS control systems." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B31580324.
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Gray, Shani P. "Faith-based organizations (FBOs) and community crime control initiatives." [Bloomington, Ind.] : Indiana University, 2005. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3185394.
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Thesis (Ph. D.)--Indiana University, 2005.Source: Dissertation Abstracts International, Volume: 66-08, Section: A, page: 3101. Chair: Steven Chermak. Title from dissertation home page (viewed Oct. 5, 2006).
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Fan, Chi-kit, and 樊智傑. "Design and analysis of agent-based FMS control systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B31580324.
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Ismahil, Dlovan. "Investigating Fog- and Cloud-based Control Loops for Future Smart Factories." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-36705.
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In the recent years we have seen that internet connectivity has multiplied vastly and that more and more computation and information storage are moved to the cloud. Similarly to other types of networks, industrial systems also see an increase in the number of communicating devices. Introduction of wireless communication into industrial systems instead of currently used wired networks will allow interconnection of all kinds of stationary and mobile machinery, robots and sensors and thereby bring multiple benefits. Moreover, recent developments in cloud and fog computing open many new opportunities in control, analysis and maintenance of industrial systems. Wireless systems are easy to install and maintain and relocation of data analysis and control services from local controllers to the cloud can make possible computations requiring a lot of resources, improve efficiency of collaboration between different parts of a plant or several plans as cloud servers will be able to store information and be accessible from all of them. However, even though introduction of wireless communication and cloud services brings a lot of benefits, new challenges in fulfilling industrial requirements arise as, e.g., packet delivery rates might be affected by disturbances introduced in wireless channels, data storage on distant servers might introduce timing and security issues, resource allocation and reservation for controllers supervising multiple processes should be considered to provide real-time services. The main goal of this thesis work is to consider design possibilities for a factory including local and cloud controllers, i.e. look at how the work of the factory should be organized, where control decisions should be made, analyze pros and cons of making the decisions at local (fog) and cloud servers. To narrow down the problem, an example factory with who independent wireless networks (each consisting of one sensor, one actuator and one local control node) and a cloud controller controlling both of them will be considered. Selected structure allows all the questions of interest to be considered, while its prototype can be built using available for this thesis work equipment
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Carlén, Stefan. "Estimation of visual focus for control of a FOA-based image coder." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2032.
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A major feature of the human eye is the compressed sensitiveness of the retina. An image coder, which makes use of this, can heavily encode the parts of the image which is not close to the focus of our eyes. Existing image coding schemes require that the gaze direction of the viewer is measured. However, a great advantage would be if an estimator predicts the focus of attention (FOA) regions in the image.
This report presents such an implementation, which is based on a model that mimics many of the biological features of the human visual system (HVS). For example, it uses a center-surround mechanism, which is a replica of the receptive fields of the neurons in the HVS.
An extra feature of the implementation is the extension to handle video sequences, and the expansion of the FOA:s. The test results of the system show good results from a large variety of images.
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Brend, O. "Implementation and experimental evaluation of multiple model switched adaptive control for FES-based rehabilitation." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/364612/.
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Functional electrical stimulation (FES) is a well-established approach that is employed as a therapeutic tool for the restoration of motor control in individuals experiencing muscle impairment. Although its use as a rehabilitation tool is validated by clinical results, current control approaches limit the full exploitation of its potential due to the lack of accuracy with which the FES is applied. Research has thus focused on the use of advanced, closed-loop control algorithms to provide more accurate FES that is both task-oriented, and matches the rehabilitation needs of the patient. Experimental results have been reported for a variety of control schemes. However, the majority of approaches have failed to transfer to clinical practice due to the difficulties associated with identifying a model of electrically stimulated muscle that adapts as the true plant varies with time. Estimation-based multiple model switched adaptive control (EMMSAC) is a robust control approach that has the potential to overcome the problems associated with the uncertain, time-varying properties of electrically stimulated muscle. EMMSAC utilises optimal disturbance estimation to assess the respective performances of a set of candidate plant models. Then the controller associated with the model that has best performance is switched into closed-loop operation. This thesis details the algorithmic modifications that allow disturbance estimation to be performed in the time-varying setting for nonlinear Hammerstein structures. Then it is shown experimentally that a general plant model set can be identified that represents the time-varying, FES-induced muscle activation dynamics for the population of younger healthy adults. This finding is exploited to design an EMMSAC controller that achieves accurate trajectory tracking for multiple participants with minimal prior model identification. Results indicate that the use of EMMSAC reduces RMS tracking error when compared with a fixed controller; similar results are also reported for older healthy participants. Furthermore, initial results for a small sample of stroke-participants are shown, which confirms the potential for the proposed control approach to be applied in a clinical setting for FES-based rehabilitation.
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Rao, Tingting. "LP-based subgradient algorithm for joint pricing and inventory control problems." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45282.
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Thesis (S.M.)--Massachusetts Institute of Technology, Computation for Design and Optimization Program, 2008.Includes bibliographical references (p. 93-94).
It is important for companies to manage their revenues and -reduce their costs efficiently. These goals can be achieved through effective pricing and inventory control strategies. This thesis studies a joint multi-period pricing and inventory control problem for a make-to-stock manufacturing system. Multiple products are produced under shared production capacity over a finite time horizon. The demand for each product is a function of the prices and no back orders are allowed. Inventory and production costs are linear functions of the levels of inventory and production, respectively. In this thesis, we introduce an iterative gradient-based algorithm. A key idea is that given a demand realization, the cost minimization part of the problem becomes a linear transportation problem. Given this idea, if we knew the optimal demand, we could solve the production problem efficiently. At each iteration of the algorithm, given a demand vector we solve a linear transportation problem and use its dual variables in order to solve a quadratic optimization problem that optimizes the revenue part and generates a new pricing policy. We illustrate computationally that this algorithm obtains the optimal production and pricing policy over the finite time horizon efficiently. The computational experiments in this thesis use a wide range of simulated data. The results show that the algorithm we study in this thesis indeed computes the optimal solution for the joint pricing and inventory control problem and is efficient as compared to solving a reformulation of the problem directly using commercial software. The algorithm proposed in this thesis solves large scale problems and can handle a wide range of nonlinear demand functions.
by Tingting Rao.
S.M.
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Gomes, Pedro Emanuel de Borralho. "Desenvolvimento de ovoproduto à base de gema de ovo para fios de ovos." Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/10200.
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Mestrado em Biotecnologia AlimentarO desenvolvimento de novos produtos é atualmente uma forte aposta das empresas na busca de envolver novos eixos e nichos de mercado, através da inovação, capaz de promover produtos adequados às necessidades mais eminentes do mercado alvo. O projeto em questão, teve lugar no seio do Grupo Derovo, com o objetivo fundamental de desenvolvimento de um ovoproduto líquido pasteurizado à base de gema de ovo (ingrediente crucial e maioritário) específico para a produção de fios de ovos, cuja adequação pode ser em produtos profissionais industriais, bem como para um consumidor doméstico, pautando-se por ser um produto de fácil utilização e capaz de produzir um resultado de alta qualidade. Tratando-se de um projeto ligado ao desenvolvimento de um novo produto alimentar, este processo contemplou diversas etapas, entre as quais se destacam essencialmente: perceção/compreensão das necessidades inerentes ao mercado; ensaios preliminares; testes de formulação de protótipos e avaliação da sua performance; análise de mercado de protótipos selecionados. Numa primeira fase, realizaram-se alguns ensaios preliminares com o intuito de perceber qual o efeito de diversas etapas do ciclo produtivo da unidade produtiva em questão, acompanhados pela análise de parâmetros físico-químicos (pH; Teor de Sólidos Solúveis (°Brix); Viscosidade (mPa.s); Extrato Seco (%)) e da análise fotográfica. Demonstrou-se efetivamente que a gema de ovo não pasteurizada apresentou resultados notoriamente superiores aos conseguidos com as restantes tipologias estudadas. Após uma procura de agentes tecnológicas no mercado de ingredientes alimentares, iniciou-se a fase de formulação de diversos protótipos, por adição de diversas percentagens (0,1 a 0,03%) e combinações (agentes emulsionantes e/ou agentes texturizantes) tendo posteriormente realizado as análises físico-químicas já referenciadas (incluindo ainda Atividade da água e cor). Seguiu-se a avaliação dos protótipos em desenvolvimento na produção de fios de ovos, através de um controlo de diversos fatores inerentes à sua produção (temperatura da calda de açúcar, entre outros), tendo os resultados finais sido alvo de uma análise fotográfica, análise sensorial (provas de medição do grau de satisfação) e análise microbiológica, com o objetivo de comparar os diversos ensaios e auxiliar na selecção dos protótipos em estudo. Demonstrou-se que a percentagem de 0,03% teve a melhor performance na produção de um fio de ovo com características adequadas, principalmente por aplicação de dois agentes tecnológicos específicos (Jungbunzlauer e DynaVisc), estando igualmente adequada à qualidade exigida pelo mercado.
Development of new food products is currently a strong focus of the companies involved in the search for new ways and niche markets through innovation to promote adequate products to the most eminent needs of our market. This project, developed at the Group Derovo, had as its main objective the development of new egg product mainly constituted by pasteurized liquid egg yolk (crucial and major ingredient) specific for the production of traditional portuguese sweet – “fios de ovos” - to both professionals industrials, and also the household consumer, guided for being a product easy to use and capable of producing a high quality product. Since this is a project linked to the development of a new food product, this process included several steps, among which are important to highlight: understanding of the needs inherent in the market; preliminary tests; formulation testing of prototypes and their evaluation performance; market analysis of selected prototypes. Initially, there were some preliminary tests in order to see what effect various stages of the production cycle of egg production unit in question, followed by analysis of physico-chemical parameters (pH, Total Soluble Solids (°Brix), Viscosity (mPa.s), Dry Matter (%)) and photographic analysis. It was shown that effectively unpasteurized egg yolk was notably greater to the results achieved with other types studied. After a demand on the market of technological agents of food ingredients, several prototypes were formulated by addition of various percentages (0,1 to 0,03%) and combinations (emulsifying agents and/or texturizing agents) and subsequently analyzed from the standpoint of the physicochemical analyses already mentioned (further including Water Activity and color) and the microbiological point of view. This was followed by evaluation of the prototype under development in the production of traditional portuguese sweet – “fios de ovos” - by controlling several factors inherent in their production (temperature sugar syrup, etc.), and the final result was the target of a photographic analysis, sensory analysis (tests measuring the degree of satisfaction) and microbiological analysis in order to compare the different assays as well as aid in the selection of the prototypes in this study. It was demonstrated that the proportion of 0.03% had the better performance in the production of traditional portuguese sweet with suitable characteristics mainly by application of two specific technological agents (Jungbunzlauer e DynaVisc) and is also according to the evaluation made by the market.
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DeMott, Robert. "Development of a Flexible FPGA-Based Platform for Flight Control System Research." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2321.
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This work is part of ongoing research conducted at Virginia Commonwealth University relating to unmanned aerial vehicles. The primary objective of this thesis was to develop a flexible, high-performance autopilot platform in order to facilitate research on advanced flight control algorithms. A dual FPGA-based system architecture utilizing a stacked, multi-board design was created to meet this goal. Processing tasks were split between the two FPGA devices, allowing for improved system timing and increased throughput. A combination of analog and digital filtering techniques were employed in the new system, resulting in enhanced sensor accuracy and precision compared to the previous generation autopilot system. Several important improvements to the safety and reliability of the overall system were also achieved.
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Liu, Chuang. "Relaxed stability analysis for fuzzy-model-based observer-control systems." Thesis, King's College London (University of London), 2016. https://kclpure.kcl.ac.uk/portal/en/theses/relaxed-stability-analysis-for-fuzzymodelbased-observercontrol-systems(082673fa-9a83-4cda-8622-9358ed8d7118).html.
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Fuzzy-model-based (FMB) control scheme is an efficient approach to conduct stability analysis for nonlinear systems. Both Takagi-Sugeno (T-S) FMB and polynomial fuzzy-model-based (PFMB) control systems have been widely investigated. In this thesis, the stability analysis of FMB control systems is conducted via Lyapunov stability theory. The main contribution of the thesis is improving the applicability of T-S FMB and PFMB control strategies by relaxing stability conditions and designing fuzzy observer-controller, which is presented in the following three parts: 1) The stability conditions of FMB control systems are relaxed such that the FMB control strategy can be applied to a wider range of nonlinear systems. For T-S FMB control systems, higher order derivatives of Lyapunov function (HODLF) are employed, which generalizes the commonly used first order derivative. For PFMB control systems, Taylor series membership functions (TSMF) are brought into stability conditions such that the relation between membership grades and system states is expressed. 2) Two types of T-S fuzzy observer-controller are designed such that the T-S FMB control strategy can be applied to systems with unmeasurable states. For the first type, the T-S fuzzy observer with unmeasurable premise variables is designed to estimate the system states and then the estimated states are employed for state-feedback control of nonlinear systems. Convex stability conditions are obtained through matrix decoupling technique. For the second type, the T-S fuzzy functional observer is designed to directly estimate the control input instead of the system states, which can reduce the order of the observer. A new form of fuzzy functional observer is proposed to facilitate the stability analysis such that the observer gains can be numerically obtained and the stability can be guaranteed simultaneously. 3) The polynomial fuzzy observer-controller with unmeasurable premise variables is designed for systems with unmeasurable states. Although the consideration of the polynomial fuzzy model and unmeasurable premise variables enhances the applicability of the FMB control strategy, it leads to non-convex stability conditions. Therefore, two methods are applied to derive convex stability conditions: refined completing square approach and matrix decoupling technique. Additionally, the designed polynomial fuzzy observer-controller is extended for systems where only sampled-output measurements are available. Furthermore, the membership functions of the designed polynomial observer-controller are optimized by the improved gradient descent method. Simulation examples are provided to demonstrate and verify the theoretical analysis.
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Golesorkhi, Nader. "Sensitivity-based algorithm for modelling of plants with uncertainty and for control system design." Thesis, King's College London (University of London), 1993. https://kclpure.kcl.ac.uk/portal/en/theses/sensitivitybased-algorithm-for-modelling-of-plants-with-uncertainty-and-for-control-system-design(b28d1f3f-283a-4378-a132-c269bdfb4a8c).html.
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Manning, Francis Jay. "A Framework for Enforcing Role Based Access Control in Open Source Software." NSUWorks, 2013. http://nsuworks.nova.edu/gscis_etd/228.
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While Role Based Access Control (RBAC) has been a popular topic of research over the last several years, there are some gaps in the literature that have been waiting to be addressed. One of these gaps involves the application of RBAC to free and open source software (FOSS). With the prevalence of FOSS in most information systems growing rapidly, there is a need to be able to provide a level of confidence that the software will not compromise the data integrity of an environment, nor will it enable the violation of established access controls. Additionally, when utilizing FOSS software it is desirable to
do so without having to modify its source code whenever an update is released in order to maintain a secure environment; this makes adding proprietary modules both time consuming and expensive. The challenges involved in maintaining proprietary changes to
FOSS generates a particular interest in an RBAC environment that could be deployed without requiring modification to the source code. Developing this type of a framework presented a significant challenge due to the software having been established prior to the
definition of any security requirements that would have to be applied by the proposed framework.
What this research paper shows are the results of the development of a software framework that allowed security requirements engineering to seamlessly meld with an application after it had already been developed. This framework provided a mechanism to measurably reduce the attack surface of the application against which the framework was implemented, while performing these tasks without requiring alterations to the source code of the application. Additionally, this research introduced a mechanism that was
utilized to measure the effectiveness of the framework. This mechanism provided a means of comparing the relative effectiveness of different frameworks against the same software, as well as the effectiveness of a framework against different pieces of software.
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Phaithoonbuathong, Punnuluk. "Web service control of component-based agile manufacturing systems." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/15133.
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Current global business competition has resulted in significant challenges for manufacturing and production sectors focused on shorter product lifecyc1es, more diverse and customized products as well as cost pressures from competitors and customers. To remain competitive, manufacturers, particularly in automotive industry, require the next generation of manufacturing paradigms supporting flexible and reconfigurable production systems that allow quick system changeovers for various types of products. In addition, closer integration of shop floor and business systems is required as indicated by the research efforts in investigating "Agile and Collaborative Manufacturing Systems" in supporting the production unit throughout the manufacturing lifecycles. The integration of a business enterprise with its shop-floor and lifecycle supply partners is currently only achieved through complex proprietary solutions due to differences in technology, particularly between automation and business systems. The situation is further complicated by the diverse types of automation control devices employed. Recently, the emerging technology of Service Oriented Architecture's (SOA's) and Web Services (WS) has been demonstrated and proved successful in linking business applications. The adoption of this Web Services approach at the automation level, that would enable a seamless integration of business enterprise and a shop-floor system, is an active research topic within the automotive domain. If successful, reconfigurable automation systems formed by a network of collaborative autonomous and open control platform in distributed, loosely coupled manufacturing environment can be realized through a unifying platform of WS interfaces for devices communication. The adoption of SOA- Web Services on embedded automation devices can be achieved employing Device Profile for Web Services (DPWS) protocols which encapsulate device control functionality as provided services (e.g. device I/O operation, device state notification, device discovery) and business application interfaces into physical control components of machining automation. This novel approach supports the possibility of integrating pervasive enterprise applications through unifying Web Services interfaces and neutral Simple Object Access Protocol (SOAP) message communication between control systems and business applications over standard Ethernet-Local Area Networks (LAN's). In addition, the re-configurability of the automation system is enhanced via the utilisation of Web Services throughout an automated control, build, installation, test, maintenance and reuse system lifecycle via device self-discovery provided by the DPWS protocol.
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Milagaia, Rui Rodrigues. "Dpws middleware to support agent-based manufacturing control and simulation." Master's thesis, FCT - UNL, 2009. http://hdl.handle.net/10362/1872.
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Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em Engenharia Electrotécnica e de ComputadoresIn present manufacturing systems, the current challenge is the development of highly reconfigurable, truly distributed solutions. The tendency is to build manufacturing systems with autonomous, intelligent and distributed components that will support reconfiguration and adaptability. The most promising paradigms for the implementation of such systems are multi-agents and service oriented architectures (SOA), mainly over the DPWS (Device Profile for Web Services) implementation which was aimed at devices. An important limitation of most current multi-agent systems is that the management system is not totally distributed. Failure in the agent responsible for the registry can overthrow the entire system. DPWS does not have this limitation, since the management system is totally distributed. However, DPWS does not support agent autonomy notions as efficiently. The possibility of creating a truly distributed multi-agent system by linking both approaches led to this thesis. A Middleware layer was developed that enables agents to benefit from DPWS functionalities in order to reach the proposed goal. This middleware layer joins agents, databases, hardware, simulators, human interface applications such as production system management, error correction and maintenance, etc. To prove this concept a 3D model of an agent controlled manufacturing system with transporters augmented with DPWS communication interfaces was developed.
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Santana, Maykon Rocha. "Evolsys: um ambiente de configuração e análise de algoritmos evolutivos para sintonia da base de regras fuzzy do sistema de controle de um FMS." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/8413.
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In recent years, companies have used Artificial Intelligence (AI) techniques to facilitate the decisionmaking process in manufacturing systems. The use of these techniques allows increased performance of Flexible Manufacturing System (FMS). The automation of the process using computational resources allows a deeper analysis of the system conditions, which sometimes result in a better decision taking. In this sense, the Fuzzy Logic has been engaged to carry out this task, because it has the characteristic of dealing easily with inaccurate information and encoding knowledge specialist in Fuzzy rules. However, as soon as the system complexity increases, the task of generating a Fuzzy Rule Base (FRB) appropriate to the proposed system becomes increasingly difficult. To assist this process of generation of the FRB, several techniques can be used and among them stand out the search technique called Evolutionary Algorithm (EA). The EA is used, for example, for tuning the FRB of the FMS through the reduction of the optimization variables values as Makespan or Tardiness. In the case of variable called Makespan, the tuning occurs when the EA generates an FRB that reduces the makespan values of a FMS. However, the construction of the EA that effectively generates a tuning FRB is not trivial. It is required to be in the process, the construction of various EA with different selection methods and different mutation rates among other settings until an appropriate EA for a given situation appears. Therefore, in this study we aim to build an environment configuration and performance analysis of EAs in order to define the tuning FRB of the Fuzzy Control System of an FMS, i.e., it is intended to investigate how the EA ideal parameter scenario used for tuning the FRB of the said control system. In this study, the used EA was an extension of Genetic Algorithm (GA). For implementing the proposal, an evolutionary system for configuration and analysis of this variant of the GA was created. In this system, entitled "EvolSys - Evolutionary System" parameters of the system as Number of Input Variables of FRB, Number of Output Variables of FRB, Population Size, Mutation Rate and the EA Crossover Rate, among others are configured and then, one FRB is generated. Using this, there is an EA analysis of the possibility for choosing a FRB that will provide the reduction of makespan in FMS. Consequently, through this study, we may conclude that the use of EAs in collaboration with Fuzzy system may become an important tool for turning the system responsibility to the sequences of an FMS operation. Accordingly, the environment created meets the configuration step and analysis of EAs.
Nos últimos anos, empresas tem usado técnicas de Inteligência Artificial (AI) para auxiliar o processo de tomada de decisão em sistemas de manufatura. O uso dessas técnicas possibilita o aumento do desempenho dos Sistemas Flexíveis de Manufatura (FMS), uma vez que a automatização do processo com o uso de recursos computacionais permite uma análise mais profunda das condições do sistema o que, por vezes, resulta em uma melhor tomada de decisão. Neste sentido, a Lógica Fuzzy vem sendo usada para realizar essa tarefa, pois ela tem a característica de lidar facilmente com informações imprecisas, codificando o conhecimento do especialista nas chamadas Regras Fuzzy. Entretanto, à medida que a complexidade do sistema aumenta, a tarefa de gerar uma Base de Regras Fuzzy (FRB) adequada ao sistema proposto se torna cada vez mais difícil. Para auxiliar esse processo de geração da FRB, várias técnicas podem ser usadas e dentre elas destaca-se a técnica de busca denominada Algoritmo Evolutivo (EA). O EA pode ser usado, por exemplo, para a sintonia da Base de Regras Fuzzy do Sistema de Controle de um FMS por intermédio da redução de valores de variáveis de otimização como Makespan ou Tardiness. No caso da variável denominada Makespan, a sintonia ocorre quando o EA gera uma FRB que reduz os valores do makespan do FMS em questão. Entretanto, a construção do EA que efetivamente gera uma FRB sintonizada para um FMS não é trivial, pois é necessário que haja, nesse processo, a construção de vários tipos de EA com métodos de seleção diferentes, taxas de cruzamento e mutação diferentes dentre outras configurações, até que se encontre o EA adequado à uma dada situação. Sendo assim, no presente trabalho, o objetivo é a construção de um ambiente de configuração e análise de desempenho de EAs para sintonia da FRB do Sistema de Controle de um FMS, ou seja, pretende-se investigar qual o cenário de parâmetros ideal do EA usado na sintonia da FRB do referido sistema de controle. No presente trabalho, o EA usado foi uma extensão do Algoritmo Genético (GA). Para implementação da proposta, um Sistema Evolutivo para configuração e análise dessa variante do GA foi criado. Nesse sistema, intitulado “EvolSys - Evolutionary System”, parâmetros dos sistema como Número de Varáveis de Entrada da FRB, Número de Variáveis de Saída da FRB, Tamanho da População, Taxa de Mutação e Taxa de Cruzamento do EA, dentre outros são configurados e, por consequência, uma FRB é gerada. Com isso, há a possiblidade da análise do EA para a escolha de uma FRB que venha propiciar a redução do makespan em FMSs. Portanto, é possível concluir, a partir desse trabalho, que o uso de EAs em colaboração com os sistemas Fuzzy pode vir a se tornar uma importante ferramenta para sintonia da Base de Regras do sistema responsável pelo sequenciamento das operações de um FMS e, nesse sentido, o ambiente criado cumpre a etapa de configuração e análise do desempenho de EAs.
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Matos, Ricardo Jorge Magalhães de. "Context-based wireless mesh networks." Doctoral thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12450.
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Doutoramento em Engenharia ElectrotécnicaIn the modern society, new devices, applications and technologies, with sophisticated capabilities, are converging in the same network infrastructure. Users are also increasingly demanding in personal preferences and expectations, desiring Internet connectivity anytime and everywhere. These aspects have triggered many research efforts, since the current Internet is reaching a breaking point trying to provide enough flexibility for users and profits for operators, while dealing with the complex requirements raised by the recent evolution. Fully aligned with the future Internet research, many solutions have been proposed to enhance the current Internet-based architectures and protocols, in order to become context-aware, that is, to be dynamically adapted to the change of the information characterizing any network entity. In this sense, the presented Thesis proposes a new architecture that allows to create several networks with different characteristics according to their context, on the top of a single Wireless Mesh Network (WMN), which infrastructure and protocols are very flexible and self-adaptable. More specifically, this Thesis models the context of users, which can span from their security, cost and mobility preferences, devices’ capabilities or services’ quality requirements, in order to turn a WMN into a set of logical networks. Each logical network is configured to meet a set of user context needs (for instance, support of high mobility and low security). To implement this user-centric architecture, this Thesis uses the network virtualization, which has often been advocated as a mean to deploy independent network architectures and services towards the future Internet, while allowing a dynamic resource management. This way, network virtualization can allow a flexible and programmable configuration of a WMN, in order to be shared by multiple logical networks (or virtual networks - VNs). Moreover, the high level of isolation introduced by network virtualization can be used to differentiate the protocols and mechanisms of each context-aware VN. This architecture raises several challenges to control and manage the VNs on-demand, in response to user and WMN dynamics. In this context, we target the mechanisms to: (i) discover and select the VN to assign to an user; (ii) create, adapt and remove the VN topologies and routes. We also explore how the rate of variation of the user context requirements can be considered to improve the performance and reduce the complexity of the VN control and management. Finally, due to the scalability limitations of centralized control solutions, we propose a mechanism to distribute the control functionalities along the architectural entities, which can cooperate to control and manage the VNs in a distributed way.
Na sociedade actual, novos dispositivos, aplicações e tecnologias, com capacidades sofisticadas, estão a convergir na mesma infra-estrutura de rede. Os utilizadores são também cada vez mais exigentes nas suas preferências e expectativas pessoais, desejando conetividade `a Internet em qualquer hora e lugar. Estes aspectos têm desencadeado muitos esforços de investigação, dado que a Internet atual está a atingir um ponto de rutura ao tentar promover flexibilidade para os utilizadores e lucros para os operadores, enquanto lida com as exigências complexas associadas `a recente evolução. Em sintonia com a linha de investigação para a Internet do futuro, muitas soluções têm sido propostas para melhorar as arquiteturas e protocolos da Internet atual, de forma a torná-los sensíveis ao contexto, isto é, adaptá-los dinamicamente `a alteração da informação que caracteriza qualquer entidade de rede. Neste sentido, a presente Tese propõe uma nova arquitetura que permite criar várias redes com diferentes características de acordo com o contexto das mesmas, sobre uma única rede em malha sem fios (WMN), cuja infra-estructura e protocolos são muito flexíveis e auto-adaptáveis. Mais especificamente, esta Tese modela o contexto dos utilizadores, que pode abranger as suas preferências de segurança, custo e mobilidade, capacidades dos seus dispositivos ou requisitos de qualidade dos seus serviços, de forma a transformar uma WMN num conjunto de redes lógicas. Cada rede lógica ´e configurada para satisfazer um conjunto de necessidades de contexto do utilizador (como exemplo, suporte de mobilidade elevada e de baixa seguran¸ca). Para implementar esta arquitetura centrada no utilizador, esta Tese utiliza a virtualização de redes, que tem muitas vezes sido defendida como um meio para implementar arquiteturas e serviços de rede de uma forma independente, enquanto permite uma gestão dinâmica dos recursos. Desta forma, a virtualização de redes pode permitir uma configuração flexível e programável de uma WMN, a fim de ser partilhada por várias redes lógicas (ou redes virtuais - VNs). Além disso, o grau de isolamento introduzido pela virtualização de redes pode ser utilizado para diferenciar os protocolos e mecanismos de cada VN baseada em contexto. Esta arquitetura levanta vários desafios para controlar e gerir as VNs em tempo real, e em resposta `a dinâmica dos utilizadores e da WMN. Neste contexto, abordamos os mecanismos para: (i) descobrir e selecionar a VN a atribuir a um utilizador; (ii) criar, adaptar e remover as topologias e rotas das VNs. Também exploramos a possibilidade de considerar a taxa de variação dos requisitos de contexto dos utilizadores de forma a melhorar o desempenho e reduzir a complexidade do controlo e gestão das VNs. Finalmente, devido ´as limitações de escalabilidade das soluções de controlo centralizadas, propomos um mecanismo para distribuir as funcionalidades de controlo ao longo das entidades da arquitectura, que podem cooperar para controlar e gerir as VNs de uma forma distribuída.
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Marinoni, Silvia <1975>. "Procedures of quality control and data analysis of multi-site ground-based observations for the absolute flux calibration of Gaia." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3707/.
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The Gaia space mission is a major project for the European astronomical community. As challenging as it is, the processing and analysis of the huge data-flow incoming from Gaia is the subject of thorough study and preparatory work by the DPAC (Data Processing and Analysis Consortium), in charge of all aspects of the Gaia data reduction. This PhD Thesis was carried out in the framework of the DPAC, within the team based in Bologna. The task of the Bologna team is to define the calibration model and to build a grid of spectro-photometric standard stars (SPSS) suitable for the absolute flux calibration of the Gaia G-band photometry and the BP/RP spectrophotometry. Such a flux calibration can be performed by repeatedly observing each SPSS during the life-time of the Gaia mission and by comparing the observed Gaia spectra to the spectra obtained by our ground-based observations. Due to both the different observing sites involved and the huge amount of frames expected (≃100000), it is essential to maintain the maximum homogeneity in data quality, acquisition and treatment, and a particular care has to be used to test the capabilities of each telescope/instrument combination (through the “instrument familiarization plan”), to devise methods to keep under control, and eventually to correct for, the typical instrumental effects that can affect the high precision required for the Gaia SPSS grid (a few % with respect to Vega). I contributed to the ground-based survey of Gaia SPSS in many respects: with the observations, the instrument familiarization plan, the data reduction and analysis activities (both photometry and spectroscopy), and to the maintenance of the data archives. However, the field I was personally responsible for was photometry and in particular relative photometry for the production of short-term light curves. In this context I defined and tested a semi-automated pipeline which allows for the pre-reduction of imaging SPSS data and the production of aperture photometry catalogues ready to be used for further analysis. A series of semi-automated quality control criteria are included in the pipeline at various levels, from pre-reduction, to aperture photometry, to light curves production and analysis.
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NARAYANAN, SUGAN. "APPLICATION OF WEB SERVICES FOR REMOTE ACCESS OF BEARCAT III ROBOT USING THE .NET FRAMEWORK." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1060199420.
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Guimarães, Leovani Marcial. "QFD - Quality Function Deployment : uma analise de aspectos culturais organizacionais como base para definição de fatores criticos de Sucesso (FCS) na implementação da metodologia." [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264880.
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Orientadores: Ademir Jose Petenate, Maria Carolina F. SouzaDissertação (mestrado profissional) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-03T17:32:48Z (GMT). No. of bitstreams: 1 Guimaraes_LeovaniMarcial_M.pdf: 5631433 bytes, checksum: c9350b801da78a68336458f4cc1251dc (MD5) Previous issue date: 2003
Resumo: A metodologia QFD - Quality Function Deployment, (Desdobramento da Função Qualidade) será apresentada no contexto de um projeto, buscando uma abordagem de desenvolvimento objetiva e seqüencial através de estágios de desenvolvimento de projetos. Algumas teorias sobre as culturas organizacionais e uma forma de analisá-las serão também apresentadas. Baseado nelas, os pressupostos culturais implícitos da metodologia QFD serão identificados, bem como sua relação provável com outros pressupostos compartilhados das organizações brasileiras, revelados por elementos de cultura típicos, inseridos neste mesmo contexto. Como resultado da análise crítica destas relações, pretende-se definir Fatores Críticos de Sucesso (FCS) para que as organizações que utilizam ou desejam utilizar a metodologia QFD, considerem de forma mais ampla as influências das culturas organizacionais e usem os FCS para ajudá-las a ter maior probabilidade de sucesso na implementação de seus projetos de QFD
Abstract: The QFD - Quality Function Deployment methodology will be presented within a project context, using an objective development approach through sequential stages. Some theories about organizational cultures and a method for analyzing them are also presented. Based on these concepts, QFD implicit cultural assumptions will be identified as well as their probable relationship with other shared assumptions of the Brazilian organizations revealed by typical cultural elements, within the same context. As a result of a critical analysis of those relationships, Critical Success Factors (CSF) will be defined so that the organizations that practice or intend to practice QFD, take higher considerations of the influences of the organizational cultures, and use the CSF to help them increase their probability of success on the implementation of QFD projects
Mestrado
Gestão da Qualidade Total
Mestre em Engenharia Mecânica
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Kowalchuk, Scott Allen. "Investigation of Nonlinear Control Strategies Using GPS Simulator And Spacecraft Attitude Control Simulator." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/29547.
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In this dissertation, we discuss the Distributed Spacecraft Attitude Control System Simulator (DSACSS) testbed developed at Virginia Polytechnic Institute and State University for the purpose of investigating various control techniques for single and multiple spacecraft. DSACSS is comprised of two independent hardware-in-the-loop simulators and one software spacecraft simulator. The two hardware-in-the-loop spacecraft simulators have similar subsystems as flight-ready spacecraft (e.g. command and data handling; communications; attitude determination and control; power; payload; and guidance and navigation). The DSACSS framework is a flexible testbed for investigating a variety of spacecraft control techniques, especially control scenarios involving coupled attitude and orbital motion.
The attitude hardware simulators along with numerical simulations assist in the development and evaluation of Lyapunov based asymptotically stable, nonlinear attitude controllers with three reaction wheels as the control device. The angular rate controller successfully tracks a time varying attitude trajectory. The Modified Rodrigues Parmater (MRP) attitude controller results in successfully tracking the angular rates and MRP attitude vector for a time-varying attitude trajectory. The attitude controllers successfully track the reference attitude in real-time with hardware similar to flight-ready spacecraft.
Numerical simulations and the attitude hardware simulators assist in the development and evaluation of a robust, asymptotically stable, nonlinear attitude controller with three reaction wheels as the actuator for attitude control. The MRPs are chosen to represent the attitude in the development of the controller. The robust spacecraft attitude controller successfully tracks a time-varying reference attitude trajectory while bounding system uncertainties.
The results of a Global Positioning System (GPS) hardware-in-the-loop simulation of two spacecraft flying in formation are presented. The simulations involve a chief spacecraft in a low Earth orbit (LEO), while a deputy spacecraft maintains an orbit position relative to the chief spacecraft. In order to maintain the formation an orbit correction maneuver (OCM) for the deputy spacecraft is required. The control of the OCM is accomplished using a classical orbital element (COE) feedback controller and simulating continual impulsive thrusting for the deputy spacecraft. The COE controller requires the relative position of the six orbital elements. The deputy communicates with the chief spacecraft to obtain the current orbit position of the chief spacecraft, which is determined by a numerical orbit propagator. The position of the deputy spacecraft is determined from a GPS receiver that is connected to a GPS hardware-in-the-loop simulator. The GPS simulator creates a radio frequency (RF) signal based on a simulated trajectory, which results in the GPS receiver calculating the navigation solution for the simulated trajectory. From the relative positions of the spacecraft the COE controller calculates the OCM for the deputy spacecraft. The formation flying simulation successfully demonstrates the closed-loop hardware-in-the-loop GPS simulator.
This dissertation focuses on the development of the DSACSS facility including the development and implementation of a closed-loop GPS simulator and evaluation of nonlinear feedback attitude and orbit control laws using real-time hardware-in-the-loop simulators.Ph. D.
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Gebreel, Abd Almula G. M. "POWER CONVERSION FOR UHVDC TO UHVAC BASED ON USING MODULAR MULTILEVEL CONVERTER." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429358686.
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Alatas, Boran. "Development Of A Web-based Dynamic Scheduling Methodology For A Flexible Manufacturing Cell Using Agent Based Distributed Internet Applications." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604693/index.pdf.
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The increasing importance of computer leads to develop new manufacturing methods. One of the most important example&ldquo
unmanned shop floor&rdquo
model aims, the mankind can work in jobs that they can be more efficient and more comfortable. As the base of this model, in Middle East Technical University Computer Integrated Manufacturing Laboratory (METUCIM) &ldquo
Agent Version 1.1&rdquo
system is developed. Windows Distributed Internet Applications (DNA) modeling technique is used for the software development. In the developed system, by using web pages, one can give work orders to the flexible manufacturing cell in METUCIM. The manufacturing capabilities of the cell are limited by the capabilities of CNC Lathe and CNC Milling machine that exist in the system. By the developed agent based dynamic scheduling method, it is prevented to be only an experimental system for the manufacturing cell. The real manufacturing environment is adapted to the cell that it is possible to give unlimited number of work orders. The work orders can be queued and manufactured according to their &ldquo
priorities&rdquo
. By the &ldquo
web-cam&rdquo
application the given work orders can be watched from the web site so the system reliability is increased for the engineer. In the real manufacturing environment it is very frequent that the &ldquo
urgent part&rdquo
is needed to manufacture. In this system it is possible to give &ldquo
urgent orders&rdquo
for these situations.
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Mujtaba, Ahmed. "Control scheme for electric drives based on synchronous reluctance machines with a non-linear MTPA controller." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
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This dissertation focus on a Maximum Torque per Ampere (MTPA) control scheme for a non-linear synchronous reluctance motor (Sync-Rel). Due to the absence of permanent magnets, Sync-Rel motors have poor torque production capability and relatively low power factor. Therefore, it is important to maximize the torque given the maximum current of the power inverter.
In the classical solution to the MTPA control problem, the d-q current components are considered equal. This solution assumes a linear magnetic circuit for the Sync-Rel motor. In practical applications, the Sync-Rel motor has a non-linear magnetic core. As a consequence, the linear solution to the MTPA problem is not the best one anymore.
In this dissertation, we model a non-linear Sync-Rel motor using a simplified magnetic model, taking into account the magnetic saturation. Then, we design a non-linear MTPA controller. The Sync-Rel motor drive is simulated, and the performance of both linear and non-linear controller are compared.
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Viljoen, Johannes Henning. "Modelling and optimal control of the market of a telecommunications operator." Diss., Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-09152004-100823.
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Hadjikypris, Melios. "Supervisory control scheme for FACTS and HVDC based damping of inter-area power oscillations in hybrid AC-DC power systems." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/supervisory-control-scheme-for-facts-and-hvdc-based-damping-of-interarea-power-oscillations-in-hybrid-acdc-power-systems(cc03b44a-97f9-44ec-839f-5dcbcf2801f1).html.
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Modern interconnected power systems are becoming highly complex and sophisticated, while increasing energy penetrations through congested inter-tie lines causing the operating point approaching stability margins. This as a result, exposes the overall system to potential low frequency power oscillation phenomena following disturbances. This in turn can lead to cascading events and blackouts. Recent approaches to counteract this phenomenon are based on utilization of wide area monitoring systems (WAMS) and power electronics based devices, such as flexible AC transmission systems (FACTS) and HVDC links for advanced power oscillation damping provision. The rise of hybrid AC-DC power systems is therefore sought as a viable solution in overcoming this challenge and securing wide-area stability. If multiple FACTS devices and HVDC links are integrated in a scheme with no supervising control actions considered amongst them, the overall system response might not be optimal. Each device might attempt to individually damp power oscillations ignoring the control status of the rest. This introduces an increasing chance of destabilizing interactions taking place between them, leading to under-utilized performance, increased costs and system wide-area stability deterioration. This research investigates the development of a novel supervisory control scheme that optimally coordinates a parallel operation of multiple FACTS devices and an HVDC link distributed across a power system. The control system is based on Linear Quadratic Gaussian (LQG) modern optimal control theory. The proposed new control scheme provides coordinating control signals to WAMS based FACTS devices and HVDC link, to optimally and coherently counteract inter-area modes of low frequency power oscillations inherent in the system. The thesis makes a thorough review of the existing and well-established improved stability practises a power system benefits from through the implementation of a single FACTS device or HVDC link, and compares the case –and hence raises the issue–when all active components are integrated simultaneously and uncoordinatedly. System identification approaches are also in the core of this research, serving as means of reaching a linear state space model representative of the non-linear power system, which is a pre-requisite for LQG control design methodology.
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Cisneros, Montoya Rafael. "Commande PI basée sur la passivité : application aux systèmes physiques." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS187/document.
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Le régulateur PID (Proportionnel-Intégral-Dérivée) est la commande par retour d'état la plus connue. Elle permet d'aborder un bon nombre de problèmes de commande, particulièrement pour des systèmes faiblement non linéaire et dont la performance requise est relativement modeste. En plus, en raison de sa simplicité, la commande PID est largement utilisée en l'industrie. Étant donnés que les méthodes de réglage de la commande PID sont basées sur la linéarisation, la synthèse d'un contrôleur autour d'un point d'équilibre est relativement simple, néanmoins, la performance sera faible dans des modes de fonctionnement loin du point d'équilibre. Pour surmonter ce désavantage, une pratique courante consiste en adapter les gains du PID, procédure connue sous le nom de séquencement de gain (ou gain-scheduling en anglais). Il y a plusieurs désavantages à cette procédure, comme la commutation des gains de la commande et la définition -non triviale- des régions de l'espace d'état dans lesquelles cette commutation aura lieu. Ces deux problèmes se compliquent quand la dynamique est fortement non linéaire. Dans d'autres méthodes, la synthèse de la commande utilise des schémas empiriques, ce qui ne permet pas l'analyse de la stabilité globale du processus. Dans ce contexte, ce travail de thèse a pour objectif de synthétiser des contrôleurs PI, basés sur la passivité, de telle sorte que la stabilité globale du système en boucle fermé soit garantie. L'un des avantages à utiliser la passivité est son attrait intuitif, qui exploite les propriétés physique des systèmes. L'idée centrale dans un système passive est que l'écoulement d'énergie entrante au système provenant de l'extérieur n'est pas inférieur à l'incrément de son énergie de stockage. Par conséquence, ces systèmes ne peuvent pas stocker plus d'énergie que celle fournie, dont la différence correspond à l'énergie dissipée. En introduisant le concept d'énergie, cette méthodologie nous permet de formuler le problème de commande en celui de trouver un système dynamique dont la fonction de stockage d'énergie prend la forme désirée. En incorporant le concept d'énergie cette méthode devient accessible à la communauté de praticiens et permets de fournir des interprétations physique de l'action de commande. Dans cette thèse, une méthodologie constructive de commande PI basée sur la passivité est présentée et motivée par des applications à des systèmes physiquesOne of the best known forms of feeding back a system is through a three-term control law called PID (Proportional-Integral-Derivative) controller. PID controllers are sufficient for many control problems, particularly when process dynamics are not highly nonlinear and the performance requirements are modest. Besides, because of its simple structure, the PID controller is the most adopted control scheme by industry and practitioners, beeing the PI the form mostly employed. Since the PI tuning methods are based on the linearization, commissioning a PI to operate around a single operating point is relatively easy, however, the performance will be below par in wide operating regimes. To overcome this drawback the current practice is to re-tune the gains of the PI controllers based on a linear model of the plant evaluated at various operating points, a procedure known as gain-scheduling. There are several disadvantages of gain-scheduling including the need to switch (or interpolate) the controller gains and the non-trivial definition of the regions in the plants state space where the switching takes place - both problems are exacerbated if the dynamics of the plant is highly nonlinear. In other common scenarios, a little information about the process dynamics or only a "good" linear approximation is taken into account when designing the control design. This impedes to analyse the global stability of the system. In this context, the current thesis work is aimed at the designing of PI controllers, based on the passivity theory, such that the stability of the closed-loop system is guarantied. One of the main advantages of passivity concepts is that they offer a physical and intuitive appeal. The primary idea in passive systems is that the power flowing into the system is not less that the increase of storage. Thus, they cannot store more energy than is supplied to it from the outside, with the difference being the dissipated energy. Thus, introducing the concept of energy, this methodology allows to recast the control problem as finding a dynamical system such that system energy function takes the desired form. Also, with this formulation, the communication between practitioners and control theorists is facilitated, incorporating prior knowledge of the system and providing physical interpretations of the control action. In this thesis, a constructive methodology for deriving PI passivity-based controllers is presented and motivated by the application to physical systems
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Gebhardt, Pierre Klaus. "Design and investigation of an FPGA-based data acquisition and control architecture with MRI RF interference reduction capabilities for simultaneous PET/MRI systems." Thesis, King's College London (University of London), 2017. https://kclpure.kcl.ac.uk/portal/en/theses/design-and-investigation-of-an-fpgabased-data-acquisition-and-control-architecture-with-mri-rf-interference-reduction-capabilities-for-simultaneous-petmri-systems(20109be2-4865-47da-9b90-2ad80a54c85e).html.
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The combination of Positron Emission Tomography (PET) and Magnetic Resonance Imaging (MRI) as a multi-modality imaging technique allows the simultaneous acquisition of information about metabolic processes with very sensitivity from PET, and high-resolution anatomical or functional MR images with an excellent soft-tissue contrast from MRI. However, the design of PET/MRI systems providing an unaffected PET and MRI performance during simultaneous operation is challenging. An integration and operation of PET with a large field of view for clinical whole-body imaging can be realised through the use of semiconductorbased photo-detectors which are MR-compatible and very small compared to conventional photo-detectors. PET systems based on these new photo-detector require a dramatically higher, typically two orders of magnitude, number of detector channels to be read out by the PET acquisition system. The latter are usually designed for particular systems and are not based on architectural approaches to be easily adaptable to different detector configurations. The first aim of this thesis was to conceive a PET data acquisition architecture with concepts offering a high level of flexibility in order to meet the requirements of current and future, preclinical and clinical PET and PET/MRI detector configurations using semiconductor photo-detectors. This architecture was implemented for two preclinical PET inserts, Hyperion I and Hyperion IID, designed for simultaneous PET/MRI. The second system uses the latest detector technology known as the digital SiPM (made by Philips). The PET data acquisition platform design for Hyperion IID as well as investigations in the data transmission stability under different PET and PET/MRI operating conditions are presented. PET detectors operated in an MRI bore commonly use radio-frequency (RF) shielding to reduce PET-related RF interference and hence preserve the MR image quality. However, shields require conducting materials which give rise to eddy currents within the switching MRI fields. These eddy currents lead to local MRI field disturbances and thus MR image artefacts. The drawbacks could be avoided by operating a PET system without RF shielding, which would, however, require the PET system not to couple spurious RF signals into the MRI RF signal receive coil. The second objective of the thesis was therefore to exploit the novel capabilities of the new data acquisition system and modify the RF emissions from the PET electronics in such ways that the RF noise coupling into the MRI coil can be lowered. Three different RF interference reduction (IR) techniques are proposed which are based on rmware of field-programmable gate array (FPGA) devices, thereby offering RF IR modifications at any time compared to permanently mounted PET shields. The techniques were studied by performing simulations PET and MRI measurements. The thesis closes with PET/MRI in vivo and ex vivo measurement results to demonstrate the feasibility and stability of the data acquisition system and the imaging capabilities of Hyperion IID.
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Imine, Youcef. "Cloud computing security." Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2520.
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Ces dernières années, nous assistons à une immense révolution numérique de l’internet où de nombreuses applications, innovantes telles que l’internet des objets, les voitures autonomes, etc., ont émergé. Par conséquent, l’adoption des technologies d’externalisations des données, telles que le cloud ou le fog computing, afin de gérer cette expansion technologique semble inévitable. Cependant, l’utilisation du cloud ou du fog computing en tant que plateforme d’externalisation pour le stockage ou le partage des données crée plusieurs défis scientifiques. En effet, externaliser ses données signifie que l’utilisateur perd le contrôle sur ces derniers. D’où la sécurité des données devienne une préoccupation majeure qui doit être proprement traitée. C’est dans ce contexte que s’inscrivent les travaux de cette thèse dans laquelle nous avons déterminé dans un premier temps les principaux problèmes de sécurité liés à l’adoption du cloud et du fog computing. Puis, nous avons adressé trois problématiques de sécurité majeure, qui sont : 1 - Le contrôle d’accès aux données dans une architecture de type Cloud storage, où nous avons proposé une nouvelle solution de contrôle d’accès basée sur le chiffrement à base d’attributs. Notre solution assure un contrôle d’accès souple et à grains fins. De plus, elle permet d’effectuer une révocation immédiate des utilisateurs et des attributs sans aucune mise à jour des clés de chiffrement fournies aux utilisateurs. 2 - Le problème de l’authentification mutuelle entre les utilisateurs et les serveurs Fog dans une architecture Fog computing, où nous avons proposé un nouveau schéma d’authentification efficace, qui assure l’authentification mutuelle et qui est robuste contre les comportements malicieux des serveurs Fog. 3 - Le problème de traçabilité et de la protection de la vie privée dans le cadre des applications de partage d’informations publiques, où nous avons proposé une nouvelle solution pour le partage d’informations publiques assurant le service de traçabilité tout en préservant les informations privées des utilisateurs. Avec notre solution, les serveurs d’externalisations authentifient les utilisateurs sans pouvoir obtenir des informations sur leur vie privée. En cas de comportements malicieux, notre solution permet de tracer les utilisateurs malveillants grâce à une autoritéThese last years, we are witnessing a real digital revolution of Internet where many innovative applications such as Internet of Things, autonomous cars, etc., have emerged. Consequently, adopting externalization technologies such as cloud and fog computing to handle this technological expansion seems to be an inevitable outcome. However, using the cloud or fog computing as a data repository opens many challenges in prospect. This thesis addresses security issues in cloud and fog computing which is a major challenge that need to be appropriately overcomed. Indeed, adopting these technologies means that the users lose control over their own data, which exposes it to several security threats. Therefore, we first investigated the main security issues facing the adoption of cloud and fog computing technologies. As one of the main challenges pointed in our investigation, access control is indeed a cornerstone of data security. An efficient access control mechanism must provide enforced and flexible access policies that ensure data protection, even from the service provider. Hence, we proposed a novel secure and efficient attribute based access control scheme for cloud data-storage applications. Our solution ensures flexible and fine-grained access control and prevents security degradations. Moreover, it performs immediate users and attributes revocation without any key regeneration. Authentication service in fog computing architecture is another issue that we have addressed in this thesis. Some traditional authentication schemes endure latency issues while others do not satisfy fog computing requirements such as mutual authentication between end-devices and fog servers. Thus, we have proposed a new, secure and efficient authentication scheme that ensures mutual authentication at the edge of the network and remedies to fog servers' misbehaviors.Finally, we tackled accountability and privacy-preserving challenges in information-sharing applications for which several proposals in the literature have treated privacy issues, but few of them have considered accountability service. Therefore, we have proposed a novel accountable privacy preserving solution for public information sharing in data externalization platforms. Externalization servers in our scheme authenticate any user in the system without violating its privacy. In case of misbehavior, our solution allows to trace malicious users thanks to an authority
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Zhang, Qin. "Estimation du couple généré par un muscle sous SEF à la base de l'EMG évoquée pour le suivi de la fatigue et le contrôle du couple en boucle fermée." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2011. http://tel.archives-ouvertes.fr/tel-00820474.
Full textAbstract:
La stimulation éléctrique fonctionnelle (SEF) peut améliorer de manière significative la mobilité des blessés médullaires ainsi que la stabilité et la prévention des effets secondaires. Dans le domaine de la SEF pour les membres inférieurs, le couple articulaire doit être fournie de façon appropriée pour effectuer le mouvement prévu afin de maintenir l'équilibre postural. Toutefois, les changements d'état du muscle telle que la fatigue musculaire est une cause majeure qui dégrade ses performances. En outre, la plupart des patients, dont la blessure médulaire est complète, n'ont pas le retour sensorielle qui permet de détecter la fatigue. De plus, et les capteurs de couples in-vivo ne sont pas disponibles à l'heure actuelle. Les systèmes conventionnels de commande SEF sont soit en boucle ouverte ou en boucle fermée mais cependant pas assez robustes aux changements d'état du muscle. L'objectif de cette thèse est le développement de la prédiction du couple articulaire et de la commande en boucle fermée afin d'améliorer les performances de la commande SEF en termes de précision, de robustesse et de sécurité pour les patients. Afin de prédire le couple articliare induit de la SEF, l'électromyographie (EMG) induit est utilisée pour corréler l'activité musculaire éléctrique et mécanique. Bien que la fatigue musculaire représente une variation dans le temps, une dépendance aux sujets et aux protocoles, la méthode proposée d'identification adaptative, basée sur le filtre de Kalman, est capable de prédire le couple articlaire variant dans le temps de manière systématique. La robustesse de la prédiction du couple articulaire a été evaluée lors d'une tâche de suivi de la fatigue en expérimentation chez des sujets blessés médullaires. Les résultats montrent une bonne performance de suivi des variations d'état des muscles en présence de fatigue et face à d'autres perturbations. Basée sur les performances de precision de la méthode prédictive proposée, une nouvelle stratégie de commande utilisant le retour EMG, "EMG-Feedback Predictive Control (EFPC)", est proposée afin de contrôler de manière adaptative les séquences de stimulation en compensant la variation dans le temps de l'état du muscle. De plus, cette stratégie de commande permet explicitement d'éviter d'appliquer une stimulation excessive aux patients, et de générer les séquences de stimulation appropriées pour obtenir la trajectoire désirée des couples articulaires.
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Rocha, Andre Luiz Sena da. "Controle on-line por atributos para o n?mero de n?o-conformidades no item inspecionado com base em uma sequ?ncia de inspe??o." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15019.
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This paper proposes a procedure to control on-line processes for attributes, using an Shewhart control chart with two control limits (warning limit and control limit) and will be based on a sequence of inspection (h). The inspection procedure is based on Taguchi et al. (1989), in which to inspect the item, if the number of non-conformities is higher than an upper control limit, the process needs to be stopped and some adjustment is required; and, if the last inspection h, from all items inspected present a number of non-conformities between the control limit and warning limit. The items inspected will suffer destructive inspection, being discarded after inspection. Properties of an ergodic Markov chain are used to get the expression of average cost per item and the aim was the determination of four optimized parameters: the sampling interval of the inspections (m); the constant W to draw the warning limit (W); the constant C to draw the control limit (C), where W ? C, and the length of sequence of inspections (h). Numerical examples illustrate the proposed procedure
Este trabalho prop?e um procedimento de controle on-line de processos por atributos, utilizando um gr?fico de Shewhart com dois Limites de Controle (Limite de Advert?ncia e Limite de Controle) e ser? baseado numa sequ?ncia de inspe??o (h). O procedimento de inspe??o ? baseado em Taguchi et al. (1989). Assim, ao inspecionar o item, o processo ? parado para ajuste se o n?mero de n?o conformidades for superior ao Limite de Controle; como tamb?m se nas ?ltimas h inspe??es, todos os h itens inspecionados apresentarem um n?mero de n?o-conformidades entre os Limites de Advert?ncia e de Controle. Utilizando-se de propriedades de uma Cadeia de Markov Erg?dica, foi obtida uma express?o do custo m?dio do sistema de controle, que pode ser minimizada por quatro par?metros: Intervalo entre inspe??es (m), Limite de Advert?ncia (W), Limite de controle (C, em que W ≤ C) e o tamanho da sequ?ncia de inspe??o (h). Um exemplo num?rico ilustra o procedimento proposto
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Laias, Elmabruk M. "Performance Analysis and Enhancement of QoS Framework for Fixed WiMAX Networks. Design, analysis and evaluation of 802.16 Point-to-Multipoint (PMP) Quality of Service Framework based on uplink scheduler and call admission control analysis." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4318.
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Given the current developments and advances in the scientific and technological aspects of human knowledge and introducing new approaches in various fields of telecommunication technologies and industries, there has been an increasing growth in its players' plans and a positive change in their outlooks in order to achieve the target of "anywhere and anytime access". Recent developments of WiMAX (Worldwide interoperability for Microwave Access) networks, as a sign of increasing needs and demands for new telecommunication services and capabilities, have led to revolutions in global telecommunication which should be perceived properly in terms of the commercial and technical aspects in order to enjoy the new opportunities. Most experts believe that WiMAX technology is a preliminary step to develop Fourth Generation networks known as 4G technologies. It has not only succeeded in the utilization of several of the latest telecommunication techniques in the form of unique practical standards, but also paved the way for the quantitative and qualitative developments of high-speed broadband access. IEEE 802.16 Standard introduces several advantages, and one of them is the support for Quality of Services (QoS) at the Media Access Control (MAC) level. For these purposes, the standard defines several scheduling classes at MAC layer to treat service flow in a different way, depending on QoS requirements. In this thesis, we have proposed a new QoS framework for Point-to-Multi Point (PMP) 802.16 systems operating in Time Division Duplexing (TDD) mode over a WirelessMAN-OFDM physical layer. The proposed framework consists of a Call Admission Control (CAC) module and a scheduling scheme for the uplink traffic as well as a simple frame allocation scheme. The proposed CAC module interacts with the uplink scheduler status and it makes its decision based on the scheduler queue status; on the other hand, the proposed scheduling scheme for the uplink traffic aims to support realtime flows and adapts the frame-by-frame allocations to the current needs of the connections, with respect to the grants boundaries fixed by the CAC module. Extensive OPNET simulation demonstrates the effectiveness of the proposed architecture.
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Anjos, Teresa Cristina Carvalho dos. "Uma análise do exercício da preceptoria e as Diretrizes Curriculares Nacionais no Programa de Prevenção e Controle das Doenças Sexualmente Transmissíveis, AIDS e Hepatites Virais do Município de Maceió." Universidade Federal de Alagoas, 2015. http://www.repositorio.ufal.br/handle/riufal/1314.
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This work investigates the exercise on preceptorship in the Program for Prevention and Control of Sexually Transmitted Diseases, HIV, AIDS and Viral Hepatitis - STD/HIV/AIDS e HV from Maceió city related to the National Curriculum Directives - DCN on the learning of general skills recommended for professional practice in healthcare. It features an article entitled “Possibilidades e Desafios da Preceptoria no Programa DST/HIV/AIDS e Hepatites Virais de Maceió”. It is about a descriptive study of qualitative approach. For collecting and processing the data was used semi-structured interview technique based on content analysis. The study data point to the empirical knowledge of research participants about the role of preceptor and the ignorance about what recommends DCNs published in 2001 on skills development. Based on the results of the research it were elaborated two products: the first, in the form of systematic intervention project, called "Rodas de Conversas: tecendo diálogos – construindo caminhos" whose goal is to strengthen the teaching-service integration in STD/HIV/AIDS e HV; the second, a documentary video called "Programa DST/HIV/AIDS e HV: um espaço de aprendizagem” a tool to be made available for tutors in order to support them in reception and integration of students in service, enabling a larger view on program power for professional learning. The intention is that the proposed products can contribute to strengthening and expanding the preceptorship activity under the Health Surveillance, specifically in the STD/HIV/AIDS and HV Program, improving the reception and integration of students in the practice setting and strengthen dialogue between educational institutions and the service.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Esta pesquisa investigou o exercício da preceptoria no Programa de Prevenção e Controle das Doenças Sexualmente Transmissíveis, HIV, AIDS e Hepatites Virais – DST/HIV/AIDS e HV do Município de Maceió relacionado as Diretrizes Curriculares Nacionais – DCNs no que se refere ao aprendizado das competências gerais preconizadas para o exercício profissional na área da saúde. Apresenta um artigo intitulado “Possibilidades e Desafios da Preceptoria no Programa DST/HIV/AIDS e Hepatites Virais do Município de Maceió”. Trata-se de um estudo descritivo de abordagem qualitativa. Para coleta e tratamento dos dados foi utilizada a técnica da entrevista semi estruturada fundamentada na análise de conteúdo. Os dados deste estudo apontam para o conhecimento empírico dos participantes da pesquisa sobre o papel do preceptor e o desconhecimento sobre o que preconiza as DCNs publicadas em 2001 no desenvolvimento de competências. A partir do resultado da pesquisa foram elaborados dois produtos: o primeiro, na modalidade de projeto de intervenção sistemático, denominado “Rodas de Conversas: tecendo diálogos – construindo caminhos” cujo objetivo é fortalecer a integração ensino-serviço no Programa DST/HIV/AIDS e HV; o segundo, um vídeo documental denominado “Programa DST/HIV/AIDS e HV: um espaço de aprendizagem” ferramenta esta a ser disponibilizada para os preceptores com o objetivo de apoiá-los no acolhimento e integração dos estudantes no serviço, possibilitando uma visão ampliada sobre a potência do programa para a aprendizagem profissional. A intencionalidade é que os produtos propostos possam contribuir para fortalecer e ampliar a atividade de preceptoria no âmbito da Vigilância em Saúde, especificamente no Programa DST/HIV/AIDS e HV, melhorar o acolhimento e integração dos estudantes no cenário de prática e fortalecer o diálogo entre instituições de ensino e o serviço.
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Bártolo, Rui Gabriel Lopes. "Integração de sistemas de rastreabilidade em ambiente industrial." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12483.
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Mestrado em Engenharia MecânicaA tecnologia Radio-Frequency Identification (RFID) tem vindo a ser a aposta de muitas empresas para a rastreabilidade industrial devido à sua capacidade de identificação de objetos sem contacto, permitindo que se pratiquem leituras a alguma distância. A sua alta velocidade, comparativamente com outros sistemas, e a sua precisão de aquisição de dados são também características interessantes nestes sistemas. No entanto, verificam-se alguns problemas, tais como: a elevada diversidade de sistemas RFID, as várias frequências de funcionamento (com diferentes aceitações pelo mundo), os vários tipos de acoplamento entre o leitor e a TAG, as várias Normas existentes e a constante atualização da tecnologia que levam a incompatibilidades entre sistemas. A integração de novos sistemas de rastreabilidade de certa forma ajudaria à resolução do problema de incompatibilidade de sistemas, no entanto, verifica-se também uma dificuldade neste ponto. Por isso, nesta dissertação, no âmbito da rastreabilidade industrial conjuntamente com a tecnologia RFID pretende-se criar uma camada intermédia (Middleware) que permita interligar todos os dispositivos presentes no chão da fábrica e que através de uma estrutura de mensagem proposta se possibilite uma comunicação entre camadas superiores e os vários dispositivos da camada inferior. Foi implementada uma camada intermédia numa unidade de processamento que permitiu integrar duas marcas diferentes de dispositivos RFID. Foi desenvolvida uma aplicação de rastreabilidade onde, inclusivamente, se faz o controlo dos dispositivos, direta (Modo Manual) ou indiretamente (Modo Automático) e onde relativamente à incompatibilidade entre sistemas foi desenvolvida uma janela em especial que permite a associação de TAGs internas a produtos que chegam à empresa e que não são compatíveis com o sistema de rastreabilidade (RFID) presente na empresa. Todas as ações efetuadas com esta aplicação (ações de rastreabilidade) são registadas numa Base de Dados (BD) que foi elaborada com base em modelos de rastreabilidade e onde se efetuaram as devidas modificações, procedendo-se à sua normalização. A solução proposta cumpriu com os objetivos. Relativamente à implementação, apesar de ter sido elaborada com base em duas marcas específicas de sistemas RFID, a estrutura do código e a estrutura da mensagem proposta permitem que sejam adicionadas novas secções de código na camada intermédia para novos dispositivos a integrar, continuando com a correta gestão de mensagens entre as camadas superior e inferior.
RFID technology has been affixed to many industrial companies for traceability due to its ability to identify objects without contact, allowing readings with some distance. The high speed and accuracy of data acquisition is also interesting features of this system. However there are some problems such as the high diversity of RFID systems, the various operating frequencies (with different acceptances for the world), the various coupling types between the reader and the TAG, the various existing standards and the constant updating of technology, that lead to incompatibilities between systems. The integration of new traceability systems helps to solve the problem of incompatibility between systems, however there is also a difficulty here. For this reason, in the framework of the industrial traceability along with RFID technology, it is intended, in this dissertation, create an intermediate layer (Middleware), allowing to link all devices present on the factory floor, and through a message structure proposed it allows communication between the upper and lower layer of multiple devices. It was implemented an intermediate layer in a processing unit (microcontroller) that allowed to integrate two different brands of RFID devices. It was developed a traceability application, where it controls the devices directly (Manual Mode) or indirectly (Auto Mode), where on the incompatibility between systems, we developed a special window that allows the combination of internal TAGs to products arriving to the company not compatible with the traceability system (RFID) in this company. All actions taken with this application (traceability actions) are recorded in Data Base, which was developed based on models of traceability and where it was made the necessary changes, proceeding to its standardization. The proposed solution met its goals, and despite the implementation have been developed based on two specific brands of RFID systems, the code structure and message structure proposed to be added to allow new sections of code in the intermediate layer to integrate new devices continuing with the correct management messages between the upper and lower layers.
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Ashley, Paul. "Security technologies for intranet computing." Thesis, Queensland University of Technology, 1999.
Find full text
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Zhang, Xiang Qin. "Estimation du couple généré par un muscle sous SEF à la base de l’EMG évoquée pour le suivi de la fatigue et le contrôle du couple en boucle fermée." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20191/document.
Full textAbstract:
La stimulation électrique fonctionnelle (SEF) a le potentiel de fournir une amélioration active aux blessés médullaires en termes de mobilité, de stabilité et de prévention des effets secondaires.Dans le domaine des système SEF pour les membres inférieurs, le couple articulaire adéquat doit être fournie de façon appropriée pour effectuer le mouvement prévu et maintenir l'équilibre postural. Toutefois, les changements d'état du muscle tels que la fatigue musculaire est une cause majeure qui dégrade ses performances. En outre, la plupart des patients, dont la blessure médullaire est complète, n'ont pas le retour sensorielle qui permet de détecter la fatigue et les capteurs de couples in-vivo ne sont pas disponible à l'heure actuelle. Les systèmes conventionnels de commande SEF sont soit en boucle ouverte ou pas assez robustes aux changements d'état du muscle. L'objectif de cette thèse est le développement de la prédiction du couple articulaire et la commande en boucle fermée afin d'améliorer les performances de la commande SEF en termes de précision, de robustesse et de sécurité pour les patients.Afin de prédire le couple articulaire induit de la SEF, l'électromyographie (EMG) induit est utilisé pour corréler l'activité musculaire électrique et mécanique. Bien que la fatigue musculaire représente une variation dans le temps, une dépendance aux sujets et aux protocoles, la méthode proposée d'identification adaptative, basée sur le filtre de Kalman, est capable de prédire le couple articulaire variant dans le temps de manière systématique. La robustesse de la prédiction du couple articulaire a été évaluée lors d'une tâche de suivi de la fatigue en expérimentation chez des sujets blessés médulaires.Les résultats montrent une bonne performance de suivi des variations d'état des muscles en présence de fatigue et face à d'autres perturbations. Basé sur les performances de précision de la méthode prédictive proposée, une nouvelle stratégie de commande basée sur le retour EMG, «EMG-Feedback Predictive Control» (EFPC), est proposée afin de contrôler de manière adaptative les séquences de stimulation en compensant la variation dans le temps de l'état du muscle. De plus, cette stratégie de commande permet explicitement d'éviter d'appliquer une stimulation excessive aux patients, et de générer les séquences de stimulation appropriées pour obtenir la trajectoire désirée des couples articulairesFunctional electrical stimulation (FES) has the potential to provide active improvement to spinal cord injured (SCI) patients in terms of mobility, stability and side-effect prevention. In the domain of lower limb FES system, elicited muscle force must be provided appropriately to perform intended movement and the torque generation by FES should be accurate not to lose the posture balance. However, muscle state changes such as muscle fatigue is a major cause which degrades its performance. In addition, most of the complete SCI patients don't have sensory feedback to detect the fatigue and in-vivo joint torque sensor is not available yet. Conventional FES control systems are either in open-loop or not robust to muscle state changes. This thesis aims at a development of joint torque prediction and feedback control in order to enhance the FES performance in terms of accuracy, robustness, and safety to the patients.In order to predict FES-induced joint torque, evoked-Electromyography (eEMG) has been applied to correlate muscle electrical activity and mechanical activity. Although muscle fatigue represents time-variant, subject-specific and protocol-specific characteristics, the proposed Kalman filter-based adaptive identification was able to predict the time-variant torque systematically. The robustness of the torque prediction has been investigated in a fatigue tracking task in experiment with SCI subjects. The results demonstrated good tracking performance for muscle variations and against some disturbances.Based on accurate predictive performance of the proposed method, a new control strategy, EMG-Feedback Predictive Control (EFPC), was proposed to adaptively control stimulation pattern compensating to time-varying muscle state changes. In addition, this control strategy was able to explicitly avoid overstimulation to the patients, and conveniently generate appropriate stimulation pattern for desired torque trajectory
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Tones, Megan Jane. "Patterns of engagement in workplace learning amongst employees from social sectors." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/31248/1/Megan_Tones_Thesis.pdf.
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Continuous learning and development has become increasingly important in the information age. However, employees with limited formal education in lower status occupations may be disadvantaged in their opportunities for development, as their jobs tend to require more limited knowledge and skills. In mature age, such workers may be subject to cumulative disadvantage with respect to work related learning and development, as well as negative stereotyping. This thesis concerns work related learning and development from a lifespan development psychology perspective. Development across the lifespan is grounded in biocultural co-constructivism. That is, the reciprocal influences of the individual and environment produce change in the individual. Existing theories and models of adaptive development attempt to explain how developmental resources are allocated across the lifespan. These included the Meta- theory of Selective Optimisation with Compensation, Dual Process Model of Self Regulation, and Developmental Regulation via Optimisation and Primary and Secondary Control. These models were integrated to create the Model of Adaptive Development for Work Related Learning.
The Learning and Development Survey (LDS) was constructed to measure the hypothesised processes of adaptive development for work related learning, which were individual goal selection, individual goal engagement, individual goal disengagement, organisational opportunities (selection and engagement), and organisational constraints. Data collection was undertaken in two phases: the pilot study and the main study. The objective of the pilot study was to test the LDS on a target population of 112 employees from a local government organisation. Exploratory factor analysis reduced the pilot version of the survey to 38 items encompassing eight constructs which covered the processes of the model of adaptive development for work related learning.
In the main study, the Revised Learning and Development Survey (R-LDS) was administered to another group of 137 employees from the local government organisation, as well as 110 employees from a private healthcare organisation. The purpose of the main study was to validate the R-LDS on two different groups to provide evidence of stability, and compare survey scores according to age and occupational status to determine construct validity. Findings from the main study indicated that only four constructs of the R-LDS were stable, which were organisational opportunities – selection, individual goal engagement, organisational constraints – disengagement and organisational opportunities – engagement. In addition, MANOVA studies revealed that the demographic variables affected organisational opportunities and constraints in the workplace, although individual goal engagement was not influenced by age.
The findings from the pilot and main study partially supported the model of adaptive development for work related learning. Given that only four factors displayed adequate reliability in terms of internal consistency and stability, the findings suggest that individual goal selection and individual goal disengagement are less relevant to work related learning and development. Some recent research which emerged during the course of the current study has suggested that individual goal selection and individual goal disengagement are more relevant when goal achievement is impeded by biological constraints such as ageing. However, correlations between the retained factors support the model of adaptive development for work related learning, and represent the role of biocultural co-constructivism in development. Individual goal engagement was positively correlated with both opportunity factors (selection and engagement), while organisational constraints – disengagement was negatively correlated with organisational opportunities – selection. Demographic findings indicated that higher occupational status was associated with more opportunities for development. Age was associated with fewer opportunities or greater constraints for development, especially for lower status workers.
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Yang, Ang Information Technology & Electrical Engineering Australian Defence Force Academy UNSW. "A networked multi-agent combat model : emergence explained." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Information Technology and Electrical Engineering, 2007. http://handle.unsw.edu.au/1959.4/38823.
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Simulation has been used to model combat for a long time. Recently, it has been accepted that combat is a complex adaptive system (CAS). Multi-agent systems (MAS) are also considered as a powerful modelling and development environment to simulate combat. Agent-based distillations (ABD) - proposed by the US Marine Corp - are a type of MAS used mainly by the military for exploring large scenario spaces. ABDs that facilitated the analysis and understanding of combat include: ISAAC, EINSTein, MANA, CROCADILE and BactoWars. With new concepts such as networked forces, previous ABDs can implicitly simulate a networked force. However, the architectures of these systems limit the potential advantages gained from the use of networks. In this thesis, a novel network centric multi-agent architecture (NCMAA) is pro-posed, based purely on network theory and CAS. In NCMAA, each relationship and interaction is modelled as a network, with the entities or agents as the nodes. NCMAA offers the following advantages: 1. An explicit model of interactions/relationships: it facilitates the analysis of the role of interactions/relationships in simulations; 2. A mechanism to capture the interaction or influence between networks; 3. A formal real-time reasoning framework at the network level in ABDs: it interprets the emergent behaviours online. For a long time, it has been believed that it is hard in CAS to reason about emerging phenomena. In this thesis, I show that despite being almost impossible to reason about the behaviour of the system by looking at the components alone because of high nonlinearity, it is possible to reason about emerging phenomena by looking at the network level. This is undertaken through analysing network dynamics, where I provide an English-like reasoning log to explain the simulation. Two implementations of a new land-combat system called the Warfare Intelligent System for Dynamic Optimization of Missions (WISDOM) are presented. WISDOM-I is built based on the same principles as those in existing ABDs while WISDOM-II is built based on NCMAA. The unique features of WISDOM-II include: 1. A real-time network analysis toolbox: it captures patterns while interaction is evolving during the simulation; 2. Flexible C3 (command, control and communication) models; I 3. Integration of tactics with strategies: the tactical decisions are guided by the strategic planning; 4. A model of recovery: it allows users to study the role of recovery capability and resources; 5. Real-time visualization of all possible information: it allows users to intervene during the simulation to steer it differently in human-in-the-loop simulations. A comparison between the fitness landscapes of WISDOM-I and II reveals similarities and differences, which emphasise the importance and role of the networked architecture and the addition of strategic planning. Lastly but not least, WISDOM-II is used in an experiment with two setups, with and without strategic planning in different urban terrains. When the strategic planning was removed, conclusions were similar to traditional ABDs but were very different when the system ran with strategic planning. As such, I show that results obtained from traditional ABDs - where rational group planning is not considered - can be misleading. Finally, the thesis tests and demonstrates the role of communication in urban ter-rains. As future warfighting concepts tend to focus on asymmetric warfare in urban environments, it was vital to test the role of networked forces in these environments. I demonstrate that there is a phase transition in a number of situations where highly dense urban terrains may lead to similar outcomes as open terrains, while medium to light dense urban terrains have different dynamics
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Laokri, Samia. "Assessing cost-of-illness in a user's perspective: two bottom-up micro-costing studies towards evidence informed policy-making for tuberculosis control in Sub-saharan Africa." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209273.
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Health economists, national decision-makers and global health specialists have been interested in calculating the cost of a disease for many years. Only more recently they started to generate more comprehensive frameworks and tools to estimate the full range of healthcare related costs of illness in a user’s perspective in resource-poor settings. There is now an ongoing trend to guide health policy, and identify the most effective ways to achieve universal health coverage. The user fee exemptions health financing schemes, which grounded the tuberculosis control strategy, have been designed to improve access to essential care for ill individuals with a low capacity to pay. After decades of functioning and substantial progress in tuberculosis detection rate and treatment success, this thesis analyses the extent of the coverage (financial and social protection) of two disease control programs in West Africa. Learning from the concept of the medical poverty trap (Whitehead, Dahlgren, et Evans 2001) and available framework related to the economic consequences of illness (McIntyre et al. 2006), a conceptual framework and a data collection tool have been developed to incorporate the direct, indirect and intangible costs and consequences of illness incurred by chronic patients. In several ways, we have sought to provide baseline for comprehensive analysis and standardized methodology to allow comparison across settings, and to contribute to the development of evidence-based knowledge.To begin, filling a knowledge gap (Russell 2004), we have performed microeconomic research on the households’ costs-and-consequences-of-tuberculosis in Burkina Faso and Benin. The two case studies have been conducted both in rural and urban resource-poor settings between 2007 and 2009. This thesis provides new empirical findings on the remaining financial, social and ‘healthcare delivery related organizational’ barriers to access diagnosis and treatment services that are delivered free-of-charge to the population. The direct costs associated with illness incurred by the tuberculosis pulmonary smear-positive patients have constituted a severe economic burden for these households living in permanent budget constraints. Most of these people have spent catastrophic health expenditure to cure tuberculosis and, at the same time, have faced income loss caused by the care-seeking. To cope with the substantial direct and indirect costs of tuberculosis, the patients have shipped their families in impoverishing strategies to mobilize funds for health such as depleting savings, being indebted and even selling livestock and property. Damaging asset portfolios of the disease-affected households on the long run, the coping strategies result in a public health threat. In resource-poor settings, the lack of financial protection for health may impose inability to meet basic needs such as the rights to education, housing, food, social capital and access to primary healthcare. Special feature of our work lies in the breakdown of the information gathered. We have been able to demonstrate significant differences in the volume and nature of the amounts spent across the successive stages of the care-seeking pathway. Notably, pre-diagnosis spending has been proved critical both in the rural and urban contexts. Moreover, disaggregated cost data across income quintiles have highlighted inequities in relation to the direct costs and to the risk of incurring catastrophic health expenditure because of tuberculosis. As part of the case studies, the tuberculosis control strategies have failed to protect the most vulnerable care users from delayed diagnosis and treatment, from important spending even during treatment – including significant medical costs, and from hidden costs that might have been exacerbated by poor health systems. To such devastating situations, the tuberculosis patients have had to endure other difficulties; we mean intangible costs such as pain and suffering including stigmatization and social exclusion as a result of being ill or attending tuberculosis care facilities. The analysis of all the social and economic consequences for tuberculosis-affected households over the entire care-seeking pathway has been identified as an essential element of future cost-of-illness evaluations, as well as the need to conduct benefit incidence assessment to measure equity.
This work has allowed identifying a series of policy weaknesses related to the three dimensions of the universal health coverage for tuberculosis (healthcare services, population and financial protection coverage). The findings have highlighted a gap between the standard costs foreseen by the national programs and the costs in real life. This has suggested that the current strategies lack of patient-centered care, context-oriented approaches and systemic vision resulting in a quality issue in healthcare delivery system (e.g. hidden healthcare related costs). Besides, various adverse effects on households have been raised as potential consequences of illness; such as illness poverty trap, social stigma, possible exclusion from services and participation, and overburdened individuals. These effects have disclosed the lack of social protection at the country level and call for the inclusion of tuberculosis patients in national social schemes. A last policy gap refers to the lack of financial protection and remaining inequities with regards to catastrophic health expenditure still occurring under use fee exemptions strategies. Thereby, one year before 2015 – the deadline set for the Millennium Development Goals – it is a matter of priority for Benin and Burkina Faso and many other countries to tackle adverse effects of the remaining social, economic and health policy and system related barriers to tuberculosis control. These factors have led us to emphasize the need for countries to develop sustainable knowledge.
National decision-makers urgently need to document the failures and bottlenecks. Drawing on the findings, we have considered different ways to strengthen local capacity and generate bottom-up decision-making. To get there, we have shaped a decision framework intended to produce local evidence on the root causes of the lack of policy responsiveness, synthesize available evidence, develop data-driven policies, and translate them into actions.
Beyond this, we have demonstrated that controlling tuberculosis was much more complex than providing free services. The socio-economic context in which people affected by this disease live cannot be dissociated from health policy. The implications of microeconomic research on the households’ costs and responses to tuberculosis may have a larger scope than informing implementation and adaptation of national disease-specific strategies. They can be of great interest to support the definition of guiding principles for further research on social protection schemes, and to produce evidence-based targets and indicators for the reduction and the monitoring of economic burden of illness. In this thesis, we have build on prevailing debates in the field and formulated different assumptions and proposals to inform the WHO Global Strategy and Targets for Tuberculosis Prevention, Care and Control After 2015. For us, to reflect poor populations’ needs and experiences, global stakeholders should endorse bottom-up and systemic policy-making approaches towards sustainable people-centered health systems.
The findings of the thesis and the various global and national challenges that have emerged from case studies are crucial as the problems we have seen for tuberculosis in West Africa are not limited to this illness, and far outweigh the geographical context of developing countries.
Keywords: Catastrophic health expenditure, Coping strategies, Cost-of-illness studies, Direct, indirect and intangible costs, Evidence-based Public health, Financial and Social protection for health, Health Economics, Health Policy and Systems, Informed Decision-making, Knowledge translation, People-centered policy-making, Systemic approach, Universal Health Coverage
Doctorat en Sciences de la santé publique
info:eu-repo/semantics/nonPublished
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Kouicem, Djamel Eddine. "Sécurité de l’Internet des objets pour les systèmes de systèmes." Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2518.
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L'internet des objets (IoT) est une nouvelle technologie qui vise à connecter des milliards d'objets physiques à Internet. Ces objets peuvent être engagés dans des relations complexes, notamment la composition et la collaboration avec d'autres systèmes indépendants et hétérogènes, afin de fournir de nouvelles fonctionnalités, conduisant ainsi à ce que l'on appelle les systèmes de systèmes (SoS). Les composants de l'IoT communiquent et collaborent dans des environnements distribués et dynamiques, confrontés à plusieurs problèmes de sécurité de grande ampleur. La sécurité es tconsidérée parmi les enjeux majeurs de l'IoT et soulève des défis liés aux contraintes de capacité de calcul et stockage ainsi que le très grand nombre des objets connectés. Dans cette thèse, nous nous intéressons à l'application des outils cryptographiques ainsi que la technologie blockchain pour résoudre les problèmes de sécurité dans l'IoT, à savoir : l'authentification et la gestion de confiance. Dans un premier lieu, nous nous sommes intéressés au problème du contrôle d'accès distant des actionneurs intelligents utilisant des dispositifs IoT. Pour aborder ce problème, nous avons proposé une solution de contrôle d'accès efficace et à granularité fine, basée sur le mécanisme ABE (Attribute Based Encryption) et des chaînes de hachage. À l'aide d'outils formels d'analyse de sécurité, nous avons démontré la sécurité de notre protocole face aux attaques malveillantes. Dans un deuxième lieu, nous avons abordé le problème d'authentification dans les applications IoT basé sur le paradigme du fog computing. Nous avons proposé un nouveau protocole d'authentification mutuelle efficace qui est basé sur la technologie blockchain et la cryptographie à seuil. Dans notre solution, les objets IoT et les serveurs de fog n'ont besoin que de quelques informations à stocker pour vérifier l'authenticité de chaque objet du système. L’authentification est effectuée seulement sur la bordure du réseau sans passer par des entités externes. Ainsi, la latence et la capacité de stockage sont réduites au minimum. Enfin, dans notre troisième contribution, nous avons proposé un nouveau protocole de gestion de réputation basé sur la technologie blockchain et le fog computing, avec la prise en charge de la mobilité des objets connectés. Notre protocole permet aux objets IoT d'évaluer et de partager avec précision la réputation relative aux autres objets de manière scalable, sans se recourir à une entité de confiance. Nous avons confirmé l'efficacité de notre protocole par des analyses théoriques et des simulations approfondies. Nous avons montré que notre protocole surpasse les solutions existantes,notamment en matière de scalabilité, prise en charge de la mobilité, la communication et le calculThe Internet of things (IoT) is a new technology that aims to connect billions of physical devices to the Internet. The components of IoT communicate and collaborate between each other in distributed and dynamic environments, which are facing several security challenges. In addition, the huge number of connected objects and the limitation of their resources make the security in IoT very difficult to achieve. In this thesis, we focus on the application of lightweight cryptographic approaches and blockchain technology to address security problems in IoT, namely : authentication and trust management. First, we were interested on some kind of IoT applications where we need to control remotely the execution of smart actuators using IoT devices. To solve this problem, we proposed an efficient and fine-grained access controlsolution, based on the Attribute Based Encryption (ABE) mechanism and oneway hash chains. Using formal security tools, we demonstrated the security of our scheme against malicious attacks. Second, we tackled the problem of authentication in IoT based fog computing environments. Existing authentication techniques do not consider latency constraints introduced in the context of fog computing architecture. In addition, some of them do not provide mutual authentication between devices and fog servers. To overcome these challenges, we proposed a novel, efficient and lightweight mutual authentication scheme based on blockchain technologyand secret sharing technique. We demonstrated the efficiency of our authentication scheme through extensive simulations. The third problem treated in this work is the trust management in IoT. Existing trust management protocols do not meet the new requirements introduced in IoT such as heterogeneity, mobility and scalability. To address these challenges, we proposed a new scalable trust management protocol based on consortium blockchain technology and fog computing paradigm, with mobility support. Our solution allows IoT devices to accurately assess and share trust recommendations about other devices in a scalable way without referring to any pre-trusted entity. We confirmed the efficiency of our proposal through theoretical analysis and extensive simulations. Finally, we showed that our protocol outperforms existing solutions especially in terms of scalability, mobility support, communication and computation
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Navrátil, Václav. "Snižování hluku kolejových vozidel v traťových obloucích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400957.
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Riegelmayer, Wolfgang P. "IN - eine verteilte Service-Plattform mobiler Prozeßarchitekturen für verkehrstelematische Anwendungen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1139155423192-85244.
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Der Paradigmenwechsel zur Entwicklungsmethodik innerhalb verteilter Kommunikationssysteme schlägt sich auch in der Telematik zum Anwendungspotential und Systemkomplexität nieder. Dies liefert eine neue Auffasung dessen, was den transparenten Datenkanal ausmacht.
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Rodrigues, Claudio Alves. "Governança para resultados: estudo de caso em uma empresa pública de tecnologia da informação." reponame:Repositório Institucional do FGV, 2015. http://hdl.handle.net/10438/13467.
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The adoption of a results-oriented governance in the public service has emerged as an organizational management approach as part o f a broad movement o f the new public management (NPM). In Brazil, public companies have been concerned in the search for better management contrai mechanisms to achieve good results in the delivery of public services for customers and users. The term 'Organizational Performance Management' refers to any integrated and systematic approach to improving performance to achieve strategic aims and pro mote the mission and values ofthe organization. Thus, this research studies practices related to the organizational performance management, enabling the targeting of efforts on improving key processes, taking into account the specific characteristics o f the public nature. Another relevant aspect o f this work comes from studies by Management Objectives and Managing for Results, adopting understanding Manage by Objectives to achieve the results. Thus, a literature search was performed to identify the main frameworks of organizational performance. After this stage, it was established a criticai analysis of frameworks by watching the main contributions and strengths. Finally, it was built an assessment model in arder to make a diagnosis of managerial processes and qualify at what stage the company, which is the object of this study, is focusing on the governance for results. The assessment result reflected the perceptions of employees and managers on performance and its determinants.
A adoção de uma governança voltada para resultados na administração pública surgiu como uma abordagem de gestão organizacional, fazendo parte de um amplo movimento da nova gestão pública (NGP). No Brasil, as empresas públicas têm se preocupado em buscar melhores mecanismos de controle da gestão no sentido de lograr bons resultados na prestação dos serviços públicos para os clientes e à sociedade usuária dos serviços. O termo 'Gestão de Desempenho Organizacional' refere-se a qualquer abordagem integrada e sistemática que vise melhorar o desempenho para alcançar objetivos estratégicos e promover a missão e os valores da organização. Assim, esta pesquisa estuda práticas relacionadas à gestão de desempenho organizacional, que possibilitem o direcionamento dos esforços na melhoria dos processos chaves, levando em consideração as particularidades inerentes à natureza pública. Outro aspecto de relevância deste trabalho advém dos estudos da Gestão por Objetivos e da Gestão para Resultados, adotando a compreensão de Gerenciar por Objetivos para se conquistar os Resultados. Deste modo, foi realizada uma pesquisa bibliográfica para identificar os principais frameworks sobre desempenho organizacional. Após esta etapa, foi estabelecida uma análise crítica dos frameworks, observando as principais contribuições e pontos fortes. E por último, foi construído um modelo de avaliação com o propósito de fazer um diagnóstico dos processos gerenciais, e qualificar em qual estágio a empresa objeto deste estudo se encontra, sob o enfoque da governança para resultados. O resultado desta avaliação refletiu as percepções dos funcionários e gestores sobre o desempenho e seus determinantes.
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Riegelmayer, Wolfgang P. "IN - eine verteilte Service-Plattform mobiler Prozeßarchitekturen für verkehrstelematische Anwendungen." Doctoral thesis, Technische Universität Dresden, 2003. https://tud.qucosa.de/id/qucosa%3A23620.
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Der Paradigmenwechsel zur Entwicklungsmethodik innerhalb verteilter Kommunikationssysteme schlägt sich auch in der Telematik zum Anwendungspotential und Systemkomplexität nieder. Dies liefert eine neue Auffasung dessen, was den transparenten Datenkanal ausmacht.
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Doležalová, Veronika. "Propojení tepelného manekýna s termofyziologickým modelem člověka." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401549.
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Krucien, Nicolas. "Analyse de la qualité de l’offre de soins de médecine générale du point de vue des patients." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA11T009/document.
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Les systèmes de santé accordent une attention croissante au point de vue des usagers dans l’organisation de l’offre de soins. L’instauration d’une offre de soins sensible aux besoins et préférences des patients constitue un enjeu majeur de qualité et d’efficacité des soins. Ce travail analyse le point de vue des patients pour l’offre de soins de médecine générale en utilisant différentes méthodes permettant d’obtenir des informations complémentaires en termes d’expérience de soins, de satisfaction, d’importance ou encore de préférences. Il s’agit des méthodes Delphi, de classement du meilleur au pire et de révélation des préférences par les choix discrets. Ces méthodes sont appliquées sur deux échantillons : en population générale pour la première et chez des patients poly-pathologiques pour les 2 autres afin d’identifier les principaux enjeux actuels et à venir de la réorganisation de l’offre de soins de médecine générale du point de vue des patients. Les résultats montrent le rôle central de la relation médecin-patient et plus particulièrement de l’échange d‘informations entre le médecin et le patient. Cependant une relation médecin-patient de qualité ne doit pas pour autant être réalisée au détriment de la qualité technique du soin et de la coordination de la prise en charge du patient. Ce travail montre également l’importance de prendre en compte l’expérience de soins des patients lors de l’analyse de leur point de vue, et plus particulièrement de leur disposition au changement. L’évaluation systématique et régulière des préférences des patients en pratique quotidienne peut permettre d’améliorer la communication médecin-patient ainsi que le contenu de l’offre de soins du point de vue des patientsThe healthcare systems are paying a great interest to the patients’ perspective for the organization of health care provision. Healthcare system which is accountable and responsive of patients’ needs and preferences is a major issue for the quality and efficiency of care. In this thesis, we analyze the views of patients for the supply of GP care in using different complementary methods about patients’ experience, satisfaction, importance or preferences. These methods are applied to a sample of patients in GP and to a sample of chronically ill patients in order to identify current and future major issues for the reorganization of GP care from the patients’ perspective. The results show the main role of the doctor-patient relationship and especially of the information exchange between doctor and patient and between patient and doctor. However the quality of the doctor-patient relationship is not enough. The technical quality of care (i.e. thoroughness) and the coordination are of high importance for patients. This work highlights that it is necessary to take into account the patients’ experiences in the analysis of their perspective (e.g. preferences) to fully and appropriately understand the results, especially in terms of willingness to change. The systematic and regular screening of patient preferences in daily GP practice can improve the doctor-patient communication and the content of the provision of care from the perspective of patients
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Nogueira, Leila de Mello Yañez. "Estabilidade versus flexibilidade: a dicotomia necessária à inovação na gestão de recursos humanos em uma organização pública, estatal eestratégica como Bio-Manguinhos / Fiocruz." reponame:Repositório Institucional da FIOCRUZ, 2009. https://www.arca.fiocruz.br/handle/icict/2500.
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Previous issue date: 2009Este trabalho propõe analisar o fenômeno da terceirização desenvolvido ao longo das duas últimas décadas em Bio-Manguinhos. Trata-se de um estudo de caso realizado na unidade de produção de vacinas e reagentes para diagnóstico da Fundação Oswaldo Cruz. Inicialmente foi realizado um estudo de cenário, analisando a política de gestão do trabalho desenvolvida pelo Estado brasileiro para as instituições públicas. A seguir, a análise passou a verificar a inserção da Fiocruz nessas políticas, desde a sua criação e no decorrer de vigência de diferentes formas de contratação, alternando da extrema rigidez para a total flexibilidade sempre com foco na gestão do trabalho, e, como essas políticas se refletiram no desempenho de Bio-Manguinhos. Baseado no contexto da conformação do Estado e na análise do desempenho da unidade, o trabalho critica a falta de planejamento e de prospecção dessas políticas, que favoreça a inovação de processos, produtos e procedimentos e o desempenho pleno de uma unidade de produção de insumos para a saúde, tão necessários ao atendimento das necessidades da população brasileira. Critica também, a ausência de um modelo de Estado consolidado que sirva de arcabouço à formulação dessas políticas. Devido às fortes críticas dos órgãos de controle acerca da extrapolação dos limites da terceirização praticada nas últimas duas décadas e à falta de definição clara desses marcos legais, o trabalho apresenta uma metodologia baseada nas atribuições dos cargos do plano de carreiras da Fiocruz e culmina com a apresentação de uma matriz de atribuições passíveis de serem realizadas por contratação indireta. Conclui pela necessidade de convivência de dois quadros de trabalhadores: um permanente formado por servidores, estáveis e de carreira e outro flexível, executado por contratação indireta, de caráter eventual, temporário ou de apoio às atividades relacionadas à missão de Bio-Manguinhos. O trabalho ainda sugere a aplicação da mesma metodologia às demais unidades da Fiocruz e que a instituição afirme, frente aos órgãos de controle, quais atividades que ela precisa manter no quadro de servidores permanente e quais ela quer delegar a terceiros sem contudo, ferir a legislação vigente. Por fim, constata-se que a metodologia apresentada ameniza, mas não resolve o problema, dessa forma, recomenda-se à Fiocruz buscar mecanismos que altere o modelo de gestão pelo qual está submetida a fim de viabilizar as duas formas de incorporação de mão-de-obra.
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Chvatík, Štěpán. "Asynchronní motor s vnějším rotorem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377075.
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Chou, Yeh-Kai, and 周業凱. "End-to-End QoS Control for MPEG-4 FGS-based Multicasting." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/63095771600382452821.
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碩士國立中正大學
資訊工程研究所
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With the proliferation of online multimedia content, the popularity of multimedia streaming technology, and the establishment of video coding standards, people can ubiquitously access and retrieve various multimedia contents via the Internet. However, with the current non-gauranteed QoS Internet infrastructure, compressed multimedia transport may suffer from insufficient bandwidth, packet loss, transmission delay due to network congestion, especially for an increasing number of users and increasing multimedia sizes. Such network errors may lead to serious video quality degradation annoying to human perception. Muticasting is consider an efficient solution to improving network utilization efficiency. However, heterogeneity in multicasting will make application-level error control over network even more complicated, thereby making it still an open problem. We will investigate technical issues on error resilience coding for MPEG-4 FGS-based video streaming in heterogeneous multicasting environment. In heterogeneous multicasting, there could be a large degree of heterogeneity on network bandwidth, transmission quality, type of codecs, and computing resources and display capability, etc. among client terminals. FGS video coding has the outstanding features of low complexity, supporting a wide range of user bandwidths rather than some specific bandwidths, and packet-loss resilience, which make it especially suitable for video streaming applications. Besides, in order to serve the lower bandwidth users, we provide two bit-rates bit-streams in the base layer. Clients can switch from high bit-rate to lower one, or else. However, switching directly will cause the drift error. Therefore, we propose a “switch bit-stream” to reduce the impact of drift. Combination of multicasting and switching scheme has better performance. Finally, we will establish a server/client prototype platform with one PC serving as the video sever and several others serving as the clients to demonstrate real-time video streaming services with our proposed approaches.
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Powly, A. A. "Variable Structure Control Based Flight Control Systems For Aircraft And Missiles." Thesis, 2004. http://etd.iisc.ernet.in/handle/2005/1136.
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