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1
Mokhtari, Yacine. "Stabilisation et contrôle de quelques systèmes hyperboliques." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2021. http://www.theses.fr/2021UBFCD024.
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Cette thèse est consacrée à l’étude de deux problèmes issus de la théorie du contrôle des EDP. Dans un premier temps, on étudie le comportement asymptotique de la solution du système de von Kàrmàn viscoélastique unidimensionnel avec retard. On montre que ce dernier est bien posé dans un espace fonctionnel convenable en utilisant la méthode de Faedo-Galerkin. Pour établir notre résultat de stabilité, on utilise la méthode de Lyapunov en construisant une fonctionnelle adéquate. Dans un deuxième temps, on étudie le problème de la contrôlabilité et de la stabilisation par le bord pour l’équation des ondes unidimensionnelle dans un domaine non cylindrique. Pour la contrôlabilité, on utilise la méthode des caractéristiques pour construire l’unique solution du problème. Nous sommes alors capables de donner l’expression explicite du contrôle pour lequel le système atteint le point d’équilibre après un certain temps. De plus, on montre que ce temps est optimal. Pour la stabilisation, nous fournissons une condition nécessaire et suffisante pour que l’énergie du système décroisse à un taux prédéterminé. De plus, l’influence de la géométrie du domaine et l’influence d’un amortisseur dépendant du temps sont clarifiées. Dans un troisième temps, on étudie la contrôlabilité par le bord de deux ´équations d’ondes couplées par un couplage d’ordre un avec coefficients qui dépendent de l’espace et du temps. On fournit une condition nécessaire et suffisante pour la contrôlabilité exacte en haute fréquences dansle cas général et pour la continuation unique dans le cas cascadeThis thesis is devoted to the study of two problems related to the theory of control of PDE.In a first time, we study the asymptotic behavior of the solution to the one-dimensional viscoelastic von Kàrmàn system with delay. We prove that the latter system is well-posed in a suitable functional space using the Faedo-Galerkin method. To establish our stability result, we employ the Lyapunov method by using a suitable candidate functional.In a second time, we study the problem of boundary controllability and stabilization for the one-dimensional wave equation in non-cylindrical domains. For the controllability, one uses the characteristics method to build the unique solution. We will then be able to give the explicit expression of the controls for which the system reaches the equilibrium point after a certain time. Moreover, we show that this time is optimal.For the stabilization, we provide a necessary and sufficient condition that guarantees the energy decay at any desired rate. In addition, the influences of the domain geometry and time-dependent feedback are clarified. In a third time, we study the boundary controllability of two coupled one-dimensional wave equations with first-order coupling terms with coefficients depending on space and time. We give a necessary and sufficient conditions for both exact controllability in high frequency in the general case and for the unique continuation in the cascade case
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Hickman, Richard J. "Transcriptional regulatory codes underlying Arabidopsis stress responses." Thesis, University of Warwick, 2012. http://wrap.warwick.ac.uk/49625/.
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Plant adaptation to stress is dependent upon the initialisation of molecular signalling networks that regulate the expression of stress-related genes. By examining high-resolution microarray datasets it has been possible to track gene expression changes over time during senescence and in response to infection by fungal pathogen Botrytis cineria in the model organism Arabidopsis thaliana. Dramatic variations in gene expression are observed at the onset of stress with different groups of genes showing different expression time-courses. This observation must, for a large part, be down to the action of different transcription factors (TFs) binding to the cis-regulatory DNA in the promoters of genes in each group and it is this regulatory code that underpins the gene regulatory networks that regulate stress responses. This thesis presents an interdisciplinary investigation of the regulatory codes that are responsible for controlling plant stress responses. Computational analysis of non-coding sequences provides a powerful approach to identify patterns within DNA that may function to regulate gene expression. This thesis covers the development of Analysis of Plant Promoter-Linked Elements (APPLES), an object-orientated software framework for the analysis of non-coding DNA. Within this environment, methods were developed to probe the regulatory codes that exist within these non-coding sequences and identify regulatory motifs that may function to regulate stress responses in Arabidopsis. APPLES methods were used to identify a novel motif that is likely to play a role in regulating drought responses in Arabidopsis, with experimental approaches providing support for this view. Using known motifs that describe previously characterised TF binding sites, it was possible to identify motifs that are associated with clusters of co-regulated genes identified from the senescence and Botrytis microarray time-course datasets. This analysis revealed cis-regulatory elements that may contribute to generating the observed expression patterns. In a contrasting approach to in silico identification of regulatory elements, the Yeast-1-Hybrid (Y1H) assay was used to experimentally identify interactions between TFs and non-coding DNA. The use of a TF library allowed the ability of approximately 1400 Arabidopsis TFs to interact with a given DNA sequence in a single assay. Using the stress-associated ANAC092 promoter as a test case, it was possible to use this highthroughput procedure to identify TFs that can bind to the promoter of this gene. This high-throughput Y1H system was then used to perform a detailed mapping of protein- DNA interactions that can occur across the core promoters of three highly related stress inducible TF-encoding genes, ANAC019, ANAC055 and ANAC072. Microarrays were used to assess the regulatory consequence of a subset of these interactions by perturbing the expression of interacting TFs and observing the effect on target gene expression during multiple stresses. This approach confirmed predicted regulatory relationships and therefore enhanced the current understanding of the transcriptional regulatory networks that operate during stress responses in Arabidopsis.
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Breger, Ludivine. "Parameters impacting the outcome of cell replacement therapy for Parkinson's disease : a preclinical study." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/49925/.
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Parkinson’s disease (PD) is the most common neurodegenerative movement disorder, currently affecting 6.3 million people worldwide. Although it is associated, in the longterm, with severe complications (dyskinesias), L-DOPA remains the gold standardtreatment. An alternative approach to the treatment of PD is the replacement of the lost striatal dopaminergic innervation by transplantation of foetal ventral mesencephalon (VM) dopaminergic precursor cells. Opened trials have provided the proof of concept that intrastriatal VM transplant can survive, integrate and in some cases, restore motor functions. Nevertheless, later double blind studies reported inconsistent benefit of the therapy and the development of dyskinesias remaining after withdrawal of L-DOPA medication. The failure of the animal models in predicting these problems raises concern about their reliability. Therefore, the global aim of this PhD work was to identify some of the critical factors that can influence the functional outcome of cell therapy for PD, and on the basis of this, to develop an improved 6-OHDA unilaterally lesioned rat model for transplantation. The first step was to determine the most reliable method to assess dyskinesias in rats. The second part of this thesis was set out to determine the effect that chronic L-DOPA treatment, administered at different time could had on the survival and function of immunologically incompatible foetal VM transplant. The results demonstrated that L-DOPA administered chronically post-grafting increases the host immune response around the xenogeneic transplant. Therefore, the last set of experiments were designed to create a model of mixed donors graft to better reproduce the patient situation, where each transplant required up to 8 donors from unknown immunological background. All of these experiments come together to help to develop a rat model that more accurately represents all aspects of patients undergoing transplantation for PD.
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Ojra, Jafar. "Strategic management accounting practices in Palestinian companies : application of contingency theory perspective." Thesis, University of East Anglia, 2014. https://ueaeprints.uea.ac.uk/49725/.
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This study uses a quantitative methodology to explore the impact of contingency factors on use of strategic management accounting techniques (SMA), and combined impact of SMA Usage and contingency factors on organisational performance in a less developed country (LDC) context. The exploratory framework included two main dependent variables, namely SMA Usage and organisational performance. For the former, this study gauged the impact of perceived environmental uncertainty (competitive intensity and market turbulence), business strategy (prospector /defender), organisational structure (formalisation and decentralisation), organisational size and organisational technology on SMA Usage. For the latter, this study explored two dimensions of organisational performance (financial and non-financial) and how the conceptualised dimension(s) of organisational structure, SMA Usage, perceived environmental uncertainty and organisational strategy impact on performance. Data were collected from Palestinian large companies (cross sectors); was used to test the conceptualised framework. The analysis was based on 175 responses, representing a response rate of 43.75%. The SPSS package was used to confirm the reliability and validity of factors and also statistically estimated the association coefficients of the conceptualised relationships in the framework. The findings from this study suggest that the usage of SMA techniques is influenced by a number of factors. These are perceived environmental uncertainty (Market Turbulence) and organisational technology. Also, larger organisations tend to use more SMA techniques than smaller.
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John-Bejai, Carus Kristoff Joel. "Wheat floral biology : prospects for improving the efficiency of hybrid seed production and abiotic stress tolerance." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/49925/.
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The modification of floral characteristics will be beneficial in improving the efficiency of hybrid seed production and the breeding of more climate resilient varieties in bread wheat (Triticum aestivum). Methods for phenotyping floral traits were initially tested using small genotype panels under controlled conditions and in field trials. Low-tech phenotyping methods appropriate for use by breeders and researchers were developed and demonstrated to be accurate. A panel of 111 genotypes was subsequently assessed in field trials using these methods. A high level of genotypic variation was observed for anther extrusion, anther length and anthesis duration/pattern and phenotypes were found to be stable across trials. Using this phenotypic data set, floral trait marker-trait associations (MTAs) were detected by association mapping and additional anther extrusion quantitative trait loci (QTLs) have been detected by linkage mapping in a bi-parental population. The phenotypic effects of candidate loci co-localizing with MTAs and QTLs were investigated using TILLING mutants and modifications to floral characteristics have been observed in some mutant lines. The utilization of phenotyping and genomic resources described in the present study is discussed and areas of future research have been identified.
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Bouferrouk, Abdessalem. "A discrete vortex method analysis tool for control of flows with trapped vortices." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/49925/.
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Passive and active control studies have been conducted to investigate the feasibility of stabilising a trapped vortex. Passive stabilisation is achieved using distributed steady wall suction. An enhanced aerodynamic performance with lower drag and higher lift has been achieved as a result of passive stabilisation, but only up to moderate suction rates. When the trapped vortex is stabilised, vortex shedding is completely suppressed and flow unsteadiness is significantly reduced. Compared with steady suction, pulsed suction reduces the required suction rate for stabilisation by over 50% at an optimum pulsing frequency. Using slow suction reduction from a stable state, savings in mean suction are also possible provided the rate of suction reduction is small enough. It appears, however, that such reduction is dependent on the specific shape of the aerofoil’s cavity. A bifurcation analysis has shown that the loss of stability of a trapped vortex, from a stable state to unstable cortex shedding, is also dependent on the cavity configuration. A linear feedback controller with an optimum gain G extends the slow suction reduction results by achieving stabilisation at a reduced mean suction compared with passive stabilisation. Using DVM’s ability to simulate unsteady suction and blowing, active stabilisation using vorticity flux control achieves 16% reduction in mean flow rate compared with linear control and 19% compared with passive stabilisation. The pulsed suction technique remains the most efficient method of stabilisation. Simplified power calculations have shown suction control to be effective but only within a small range of suction rates. Using DVM’s capability of providing controlled input-output data, a linear System Identification study of the trapped vortex has resulted in a dynamical model description of a stable trapped vortex which, despite being a crude estimate, is useful in future stabilisation studies.
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Rahwan, Talal. "Algorithms for coalition formation in multi-agent systems." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/49525/.
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Coalition formation is a fundamental form of interaction that allows the creation of coherent groupings of distinct, autonomous, agents in order to efficiently achieve their individual or collective goals. Forming effective coalitions is a major research challenge in the field of multi-agent systems. Central to this endeavour is the problem of determining which of the possible coalitions to form in order to achieve some goal. This usually requires calculating a value for every possible coalition, known as the coalition value, which indicates how beneficial that coalition would be if it was formed. Now since the number of possible coalitions grows exponentially with the number of agents involved, then, instead of having a single agent calculate all these values, it would be more efficient to distribute this calculation among all agents, thus, exploiting all computational resources that are available to the system, and preventing the existence of a single point of failure. Against this background, we develop a novel algorithm for distributing the value calculation among the cooperative agents. Specifically, by using our algorithm, each agent is assigned some part of the calculation such that the agents' shares are exhaustive and disjoint. Moreover, the algorithm is decentralized, requires no communication between the agents, has minimal memory requirements, and can reflect variations in the computational speeds of the agents. To evaluate the effectiveness of our algorithm we compare it with the only other algorithm available in the literature for distributing the coalitional value calculations (due to Shehory and Kraus). This shows that for the case of 25 agents, the distribution process of our algorithm took less than 0.02% of the time, the values were calculated using 0.000006% of the memory, the calculation redundancy was reduced from 383229848 to 0, and the total number of bytes sent between the agents dropped from 1146989648 to 0. Note that for larger numbers of agents, these improvements become exponentially better. Once the coalitional values are calculated, the agents usually need to find a combination of coalitions in which every agent belongs to exactly one coalition, and by which the overall outcome of the system is maximized. This problem, which is widely known as the coalition structure generation problem, is extremely challenging due to the number of possible combinations which grows very quickly as the number of agents increases, making it impossible to go through the entire search space, even for small numbers of agents. Given this, many algorithms have been proposed to solve this problem using different techniques, ranging from dynamic programming, to integer programming, to stochastic search, all of which suffer from major limitations relating to execution time, solution quality, and memory requirements. With this in mind, we develop a novel, anytime algorithm for solving the coalition structure generation problem. Specifically, the algorithm can generate solutions by partitioning the space of all potential coalition structures into sub-spaces containing coalition structures that are similar, according to some criterion, such that these sub-spaces can be pruned by identifying their bounds. Using this representation, the algorithm can then search through the selected sub-space(s) very efficiently using a branch-and-bound technique. We empirically show that we are able to find solutions that are optimal in 0.082% of the time required by the fastest available algorithm in the literature (for 27 agents), and that is using only 33% of the memory required by that algorithm. Moreover, our algorithm is the first to be able to solve the coalition structure generation problem for numbers of agents bigger than 27 in reasonable time (less than 90 minutes for 30 agents as opposed to around 2 months for the current state of the art). The algorithm is anytime, and if interrupted before it would have normally terminated, it can still provide a solution that is guaranteed to be within a bound from the optimal one. Moreover, the guarantees we provide on the quality of the solution are significantly better than those provided by the previous state of the art algorithms designed for this purpose. For example, given 21 agents, and after only 0.0000002% of the search space has been searched, our algorithm usually guarantees that the solution quality is no worse than 91% of optimal value, while previous algorithms only guarantees 9.52%. Moreover, our guarantee usually reaches 100% after 0.0000019% of the space has been searched, while the guarantee provided by other algorithms can never go beyond 50% until the whole space has been searched. Again note that these improvements become exponentially better given larger numbers of agents.
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Watts, Yvonne Joy. "Ofsted 2005 : a new relationship with primary headteachers?" Thesis, Open University, 2012. http://oro.open.ac.uk/49125/.
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This study concerns the role of the English primary school headteacher within the school inspection process, specifically after the implementation of the key changes made by Ofsted to their inspection framework in 2005. These amendments were considerable, and included moving to shorter inspections with less notice given, alongside schools being required to undertake self- evaluation to inform the inspectorate. Much of a primary school's self-evaluation falls to the headteacher and the study focuses on the implications of Ofsted's New Relationship with Schools for the head. Mixed methods are used for the study. A questionnaire survey was sent to all 749 primary headteachers whose schools were inspected in November 2006 and follow-up interviews were undertaken with a sample of these. The extent of a head's autonomy is considered, to investigate whether variations in approach make any difference to the outcomes for a school. This practitioner study is undertaken by a serving primary headteacher which helps inform the research focus and data analysis. It includes some personal reflection from the researcher, including a consideration of the implications of the research on her professional role. The findings indicate that the primary headteachers in the study believe the new inspection process to have both advantages and disadvantages. Although there is some criticism of Ofsted, most heads recognise the need to be accountable, even though multiple accountabilities to a variety of stakeholders weigh heavily for some. The study concludes that the respondent heads who approach the inspection process with confidence and belief in their school and its practices may help to support a positive outcome by ensuring the school will be seen in the best light possible. This finding may be of interest to primary head teachers and could help to inform their professional practice.
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Marshall, Sarah. "The employment, development and support of part-time lecturers in one UK university." Thesis, Open University, 2004. http://oro.open.ac.uk/49325/.
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This research explored the nature and extent of the contribution of part-time lecturers to student learning in Higher Education, through a case study of one UK University. It drew on the experiences and opinions of part-time lecturers themselves, and of course directors, who had direct responsibility for managing the courses on which the part-timers taught. The primary data for the study was collected through a survey of each of these two groups of staff, covering the academic year 2000-2001. While the survey data in this study were largely quantitative, the inclusion of open questions provided opportunities for staff to express their own views. The issues raised were analysed against the background of previous research and emerging policy and legislation. The overall picture that emerged was of a group of staff who were enthusiastic and knowledgeable about their subject areas and committed to teaching students. However, their enthusiasm was tempered in many cases by the general failure of the university to manage this very important human resource strategically or effectively. There were examples in the responses of poor communication with part-time staff, poor administration, especially in relation to contracts and payment, lack of consideration of the information and resource needs of part-time lecturers, limited training and development opportunities, high levels of uncertainty and a tendency for managers to view part-time lecturers as a `flexible commodity'. Course directors frequently referred to the additional administration and student support that full-time academics had to take on because of the nature of the contracts given to most part-time lecturers. While there were a few examples of part-time lecturers who were well-integrated and expressed a sense of belonging to the faculty and the organisation, there were many who felt isolated and marginalised: they were rarely included in decision-making processes received only such information as directly related to the module(s) they were teaching, rarely communicated with students outside the lecture theatre or classroom and, when they did undertake broader roles (which many did), were rarely paid for the additional work. Some recommendations are made for a more strategic and inclusive approach to the management of part-time lecturers, which it is believed would have benefits for part-time and full-time lecturers alike, and would also enhance the quality of the student experience. Suggestions are also made for future research and development, including an exploration of the potential for web-based communication to reduce isolation.
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Boyer, Steven Andrew. "Playermaking : the institutional production of digital game players." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/4925/.
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This thesis investigates how the digital games industry conceptualises its audiences in both the United States and the United Kingdom. Drawing upon research focused on other media industries, it argues in favour of a constructionist view of the audience that emphasises its discursive form and institutional uses. The term “player” is institutionally constructed in the same way, not referring to the actual people playing games, but to an imagined entity utilised to guide industrial decisions. Using both desk research and information gathered from expert interviews with digital game development professionals, this thesis looks at how ideas about players are formed and held by individual workers, transformed to become relevant for game production, and embedded into broader institutional conceptions that are shared and negotiated across a variety of institutional stakeholders. Adapting the term “audiencemaking” from mass communication research, this thesis identifies three key phases of the “playermaking” process in the digital games industry. First, information about players is gathered through both informal means and highly technologised audience measurement systems. Institutional stakeholders then translate this information into player, product and platform images that can be utilised during production. The remainder of the thesis looks at the more broad third phase in which these images are negotiated amongst a variety of institutional stakeholders as determined by power relations. These negotiations happen between individual workers who hold differing views of the player during development, companies and organisations struggling over position and value across the production chain, and the actual people playing games who strive to gain more influence over the creation of the images meant to represent their interests. These negotiations also reflect national policy contexts within a highly competitive global production network, visible in the comparison between the US neoliberal definition of both the industry and players as primarily market entities and the UK creative industries approach struggling to balance cultural concerns while safeguarding domestic production and inward investment. Ultimately, this thesis argues that conceptions of players are a central force structuring the shape and operation of a digital games industry in the midst of rapid technological, industrial, political and sociocultural change.
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Cercel, Cristian Alexandru. "Philo-Germanism without Germans : memory, identity, and otherness in post-1989 Romania." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/4925/.
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The recent history of the German minority in Romania is marked by its mass migration from Romania to Germany, starting roughly in the immediate aftermath of the Second World War and reaching its climax in the early 1990s, following the fall of Communism. Against this background, the present thesis investigates a phenomenon that can be termed “philo-Germanism without Germans”, arguing that the way the German minority in Romania is represented in a wide array of discourses is best comprehended if placed in a theoretical framework in which concepts such as “self-Orientalism”, “intimate colonization” and other related ones play a key role. This dissertation departs from the existence of predominantly positive representations of Germanness in Romanian society. Furthermore, by examining a series of post-1989 Romanian identification/memory discourses, originating from three different discursive fields (politics, mass-media, historiography), it argues that the underlying reasons for this prestige are strongly connected with Romanian Europeanizing endeavours. In other words, the dissertation maintains that “loving the Germans” in post-1989 Romania is strongly connected with the production and reproduction of symbolic geographies aiming to discursively insert Romania into what is perceived to be the “civilized” Western/European World. Thus, Germans in Romania, former 12th and 18th century colonists, become actually a resource for Europeanness, a way of emphasizing Romania’s European belonging. They are “cultural Others”, possessing “all that we lack”, embraced in Romania with “love, ardour, and desire”, a clear case of discursive “selfcolonization”.
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Berhongaray, Ana Inés. "Plan de negocios productora de eventos." Bachelor's thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Económicas, 2012. http://bdigital.uncu.edu.ar/4925.
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El propósito del presente trabajo es elaborar un plan de negocio para una Productora prestadora de servicios profesionales, con el objeto de que el mismo sirva no solo como herramienta para la búsqueda de financiamiento, sino como guía para la introducción y desarrollo en el mercado laboral y empresarial de personas que se desenvuelven en el área de la prestación de un servicio profesional.
El armado de un plan de negocios como diseño arquitectónico sirve de guía, es una herramienta para competir y ayuda al crecimiento de una Productora de Eventos; además de ser un medio de consulta para decisiones.
La planificación, la aplicación de técnicas operativas y sistemas estructurales en las empresas de servicios, y el plan de negocio como una de esas herramientas es fundamental, ya que minimiza riesgos, permite proyectar a largo plazo y brinda información útil para decidir.Fil: Berhongaray, Ana Inés. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.
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O'Regan, Hannah Josephine. "A phylogenetic and palaeoecological review of the Pleistocene felid Panthera gombaszoegensis." Thesis, Liverpool John Moores University, 2002. http://researchonline.ljmu.ac.uk/4925/.
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Morotti, Elena. "Tecniche di regolarizzazione per analisi perfusionali da immagini tomografiche." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/4925/.
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Samson, Esuene M. A. "A critical evaluation of the "Tilt-Depth" method of magnetic data interpretation : application to aeromagnetic data from North Eastern (NE) Nigeria." Thesis, University of Leeds, 2012. http://etheses.whiterose.ac.uk/4925/.
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To simplify the complex total magnetic field intensity (T) on datasets obtained from locations close to the geomagnetic Equator (inclinations |α| ≤ 20°) such datasets are routinely reduced-to-equator (RTE), since they cannot be stably reduced-to-pole (RTP). RTE anomalies tend to have small amplitudes and exhibit azimuth-based anisotropy, unlike RTP anomalies. Anisotropy describes the dependence of the amplitude and shape of an RTE anomaly on the strike direction of its source. For example, an East-West striking contact/fault will generate a strong RTE anomaly response whereas a North-South striking equivalent will not. Where adjacent sources occur, anisotropy causes interference between anomalies, displacing anomalies relative to their sources. This makes using magnetic data to map structures in regions that are close to the geomagnetic equator difficult or potentially of limited value. This thesis develops a strategy to interpret RTE datasets and applies it to determine the basement structure in NE Nigeria where |α| ≤ 8°. This area has >50% of the basement concealed beneath Cretaceous and Quaternary sediments of the Benue Trough and Chad basin, respectively. The aim of the study is to structurally map the basement underlying the Benue and Chad rifted basins in NE Nigeria, by tracing and determining the depths of basement faults and associated structures. The first-order derivative-based "Tilt-Depth" method has been evaluated to determine its effectiveness when applied to RTE datasets to determine the location and depth of structures. The method was tested first using RTE and RTP equivalents of synthetic datasets obtained from profiles across East-West striking, 2D contacts at various depths, inclinations of effective magnetisation (ϕ), and dips (d). RTP datasets were used throughout as reference models. Errors in "Tilt-Depth" method estimates were invariant to changes in depth, but sensitive to changes in ϕ and d of sources. At error limits of 0-20%, the method effectively estimates locations and depths of 2D contacts when dip is within the 75 ≤ d° ≤ 105 range, inclination of remanent magnetisation relative to induced magnetisation is within the 155 ≤ β° ≤ 205 range (magnetisations are collinear), and Koenigsberger ratio (Q) of remanent to induced magnetisation amplitudes ≤ 1. Relationships between Q, α , β and ϕ suggests that the simplification of remanence-laden anomalies due to magnetisations being collinear results from deviations of ϕ from α of ≤12° when Q≤1. Similar deviations occur between ϕ and α , for all β values, when Q≤0.2. Hence, remanent magnetisation is negligible for RTP or RTE datasets when a priori information suggests Q≤0.2. The "Tilt-Depth" method was further tested for anisotropy-induced anomaly interference effects using RTP or RTE of the Complex “Bishop” Model (CBM) and Tanzania grids. The CBM grid contains 2D contacts of various strikes and three-dimensional (3D) sources with non-2D contacts at various depths (all precisely known), and satisfy the d, ϕ and Q requirements above. The Tanzania grid presented a real dataset from a Karoo rift basin, where more randomly striking 2D contacts occur at unknown depths. For comparison, the second vertical derivative, analytic signal amplitude, local wavenumber, and the horizontal gradient magnitudes of Ѳ (HGM(Ѳ)) and (HGM()) methods were also tested using these grids. Locations estimated from all these methods show that: (1) Sources of all shapes and strikes are correctly imaged on RTP grids; (2) North-South striking 2D contacts are not imaged at all on RTE datasets, but can be inferred from linear alignments of stacked short wavelength East-West striking anomalies; (3) 2D contacts with strikes ranging from N045 to N135° are correctly imaged on RTE datasets; (4) Anomalies from poorly isolated 2D contacts with N±020° strikes interfere to further complicate RTE datasets, making it difficult to correctly image these sources; and (5) RTE anomalies from 3D sources tend to smear in an East-West direction, extending such anomalies well past edges of their sources along this direction. These North-South striking non-2D edges are not imaged at all, whilst their East-West striking non 2D (Northern and Southern edges are correctly imaged. Depths estimated for 2D and non-2D contacts with strikes ranging from N045 toN135° from RTP and RTE of the CBM grids, using the local wavenumber, analytic signal amplitude and |Ѳ| = 27°- based “Tilt-Depth" methods show that: (1) "Tilt-Depth” and local wavenumber methods underestimate the actual depth of sources, while the analytic signal amplitude method provided both severely underestimated and overestimated depths. Thus, “Tilt-Depth” and local wavenumber estimates were easier to utilise and interpret; (2) "Tilt-Depth" and local wavenumber methods underestimate 2D contacts from RTP and RTE grids by up to 25 and 35% of their actual depths, respectively; (3) 'Tilt-Depth" and local wavenumber methods, respectively, underestimate depths of East-West striking non-2D edges of 3D sources by about 35 and 30% from the RTP grid; and (4) "Tiit-Depth" method consistently underestimates non-2D contacts from RTE grids by up to 40%. Using knowledge gained from the above tests, all the methods were applied to a NE Nigeria (RTE) dataset, to delineate basement structures in the area. The dataset was a 1 km upward-continued grid with 1 km x 1 km cell size, and extended well beyond NE Nigeria into Niger, Chad and Cameroon Republics. While basement depths were estimated from the dataset using the "Tilt-Depth" and local wavenumber methods only, these methods and the second vertical derivative, analytic signal amplitude, local wavenumber, as well as the horizontal gradient magnitudes of Ѳ (HGM(Ѳ)) and (HGM()) methods, were used to map source edge locations. A basement structure map of NE Nigeria was obtained using the above methods and found not to be dominated by North-South striking faults. Instead the basement is dissected mainly by near vertical, NE-SW trending faults against which NW-SE or E-W trending faults terminate. The relationship between these inferred faults, basement horsts, volcanic plugs, and basement depressions, and outcrop information suggests that rifting was episodic as the mainly NorthEast directed rift propagation direction was occasionally deflected by transcurrent faults to relieve differential stresses built up from wall rock and/or crustal resistance. Apparent stress relief features include the Yola basin, flood basalts, Lamurde Anticline and Kaltungo Inlier. A number of isolated depocenters, mainly half grabens, with sediment thickness exceeding 11km seem to occur in NE Nigeria. Outside these depocenters, basement occur at depths generally shallower than 0.5 km, except where intra-basinal horsts occur, at depths shallower than 2.5 km. These depths agree well with well information and seismic data interpretation, and show the SW Chad basin depocenter to be isolated from adjoining basins in Cameroon, Chad and Niger Republics.
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Rodda, Matt. "The man without labour : on the phantasm of artistic labour." Thesis, Glasgow School of Art, 2011. http://radar.gsa.ac.uk/4925/.
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The aim of this thesis is to reconsider the concept of labour in contemporary art. It advances a newly developed theory of the phantasm, where a double force of negation and affirmation mediates production, as an appropriate model for analysis of art in the age of immaterial labour. Specifically this thesis investigates the relationship between artists and their labour, and how artistic labour is phantasmal in that it allows artists to operate in, and make visible, a space between (or in the shadow of) the aspects ofbeingat work and being available-for work. What the phantasm defines is the crucial movement that mediates artistic labour in sense, linking the artist's interior sense or imaginary to its external production in aesthetics. Chapter 1 situates this inquiry in the current era of immaterial labour characterised by an influential body of theory that has arisen around artistic practices since the 1970s (specifically Jacques Ranciere and Giorgio Agamben), which focuses on a shift in production from material goods to human relations and social life. The increasing slippage between the material product of art and the artist's imaginary is then investigated in chapter 2 beginning with Marx's proposition that what makes labour exclusively human is that before it produces anything in reality it is first raised in the imagination. Building on Agamben's reflections on art and work (The Man Without Content) and the phantasm (Stanzas: Word and Phantasm in Western Culture), this thesis then identifies the phantasm as the dominant movement in relating the imaginary of artistic labour to its event of production. Rather than offer a new elaboration on the trajectory and history of art practices following the shift from the factory production line to the network (which emphasises communication, interaction, and creativity), the theory of the phantasm contributes an understanding of how art 'thinks' labour and how artists mediate themselves in labour. Contextualised with reference to performance art, conceptual and post-conceptual art practices, and particularly the artists Tehching Hsieh, Santiago Sierra and Bruce Nauman, chapters 3 and 4 then show how artistic practices operate to open up a space of critique of labour that combines and distributes different senses or suggest another sensory reality of labour. Chapter 3 develops this argument through Ranciere's theory of the distribution of sense in aesthetic practices (Politics of Aesthetics, Dissensus and The Aesthetic Unconscious), and situates artistic labour as a conflict between sensible presentations and our making sense of them. Chapter 4 concludes by bringing the movement of labour in the imaginary (Agamben) together with its distribution in aesthetic practices (Ranciere) to formulate a single model of artistic (phantasmatic) production. In order to face the central position of labour in art practices, what this model contributes is a way to understand and visualise artistic practices not by the products of art, but through the artist's labour as a phantasmatic moment of production, free from the obligation of producing or signifying anything other than itself.
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Hansstein, Francesca <1982>. "An interdisciplinary analysis of obesity: theory and empirical evidence." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4925/.
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The dissertation is structured in three parts. The first part compares US and EU agricultural policies since the end of WWII. There is not enough evidence for claiming that agricultural support has a negative impact on obesity trends. I discuss the possibility of an exchange in best practices to fight obesity. There are relevant economic, societal and legal differences between the US and the EU. However, partnerships against obesity are welcomed. The second part presents a socio-ecological model of the determinants of obesity. I employ an interdisciplinary model because it captures the simultaneous influence of several variables. Obesity is an interaction of pre-birth, primary and secondary socialization factors. To test the significance of each factor, I use data from the National Longitudinal Survey of Adolescent Health. I compare the average body mass index across different populations. Differences in means are statistically significant. In the last part I use the National Survey of Children Health. I analyze the effect that family characteristics, built environment, cultural norms and individual factors have on the body mass index (BMI). I use Ordered Probit models and I calculate the marginal effects. I use State and ethnicity fixed effects to control for unobserved heterogeneity. I find that southern US States tend have on average a higher probability of being obese. On the ethnicity side, White Americans have a lower BMI respect to Black Americans, Hispanics and American Indians Native Islanders; being Asian is associated with a lower probability of being obese. In neighborhoods where trust level and safety perception are higher, children are less overweight and obese. Similar results are shown for higher level of parental income and education. Breastfeeding has a negative impact. Higher values of measures of behavioral disorders have a positive and significant impact on obesity, as predicted by the theory.
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Andrade, Luciana Aparecida Soares de. "Protocolo de admissão do idoso no setor de emergência." reponame:Repositório Institucional da UFPR, 2017. http://hdl.handle.net/1884/49325.
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Orientadora: Profª Drª Mariluci Hautsch WilligDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências da Saúde, Programa de Pós-Graduação Mestrado Profissional em Enfermagem. Defesa: Curitiba, 20/07/2017
Inclui referências : f.112-123
Resumo: Trata-se de uma Pesquisa Convergente Assistencial (PCA), desenvolvida no serviço de emergência de um hospital referência no atendimento gerontológico, no período de julho de 2016 a junho de 2017. Teve como objetivo propor um protocolo de cuidado ao idoso atendido no serviço de emergência. Os participantes foram 11 enfermeiros, sendo seis enfermeiros assistenciais do setor de emergência e cinco enfermeiros coordenadores. O estudo foi submetido e aprovado no Comitê de Ética, com o CAAE nº55112516.0.0000.0102 e parecer de nº 1.574.209. A coleta de dados foi desenvolvida em três etapas: entrevista, observação participante e oficina de grupo operativo. Os dados obtidos nas entrevistas foram analisados de acordo com referencial do Discurso do Sujeito Coletivo (DSC). Os dados da observação participante e da oficina de grupo operativo foram apresentados de forma descritiva e discutidos conforme literatura pertinente. As entrevistas resultaram na construção dos DSC sobre a gestão do cuidado do idoso no setor de emergência, dos quais emergiram dois temas centrais: "As práticas de cuidado ao idoso na urgência/emergência" e "Multidimensões do cuidado ao idoso no setor de emergência". A observação participante resultou na identificação de nove ações de cuidado realizadas pelos enfermeiros: passagem de plantão; rotinas administrativas; rotinas de cuidado; supervisão da equipe de enfermagem; admissão do paciente: transferência do paciente de setor; encaminhamento do paciente para exames de imagem; atendimentos de emergência; educação em saúde. A partir das falas dos participantes na oficina verificou-se que eles compreendem que o cuidado do idoso no setor de emergência deve ter como base o conhecimento, humanização e o foco no paciente, e como elementos estruturais a capacitação da equipe, comprometimento, respeito, paciência, escuta ativa e olhar crítico. Esse conjunto é apontado como chave para alcance da excelência do cuidado. Os resultados das três etapas subsidiaram a elaboração e validação de um protocolo de admissão do idoso, sendo este o principal produto deste estudo. O cuidado do idoso no setor de emergência foi apontado como um desafio para os profissionais, tanto no que ser refere às especificidades do cuidado, quanto à organização do processo de trabalho. Nesse sentido, a elaboração do protocolo admissão é uma maneira de padronizar esse processo e fornecer as diretrizes necessárias para se alcançar um cuidado de excelência. A PCA permitiu integrar a pesquisa e o campo de prática, evidenciando o quanto essa abordagem pode contribuir para o aprimoramento da prática profissional de enfermagem. Palavras-chave: Enfermagem em Emergência. Enfermagem Geriátrica. Serviços de Saúde para Idosos.
Abstract: This dissertation is based upon an Assistant Convergent Research Approach (ACRA) carried over the emergency sector of a gerontology reference hospital, during the period of july 2016 up until july 2017. It aimed at presenting a new protocol of elderly care admitted at the emergency department. The participants were 11 nurses, six of which were assistant nurses in the emergency room and five were coordinators. This study was submitted and approved by the Ethics Committee, under CAAE nº55112516.0.0000.0102 and report nº 1.574.209. The data collection was developed in three stages: interview, active observation and operational group workshops. Data gathered from the interview were analyzed under the Collective Subject Discourse (CSD) theory. From the observation and workshops, data were presented in a descriptive way and analyzed in accordance with the related literature. The interviews resulted in the construction of CSD upon the management of the elderly care in the Emergency department, from which two main themes were drew: "The practice around the elderly care urgency/emergency" and "Multidimensions of the elderly care in the Emergency Department". The active observation resulted in the identification of nine actions in the care carried by nurses: nursing handover; care routines; nursing staff supervision; patient's admission; moving patients from one care setting to another; referrals for image exams; emergency care; health education. From the participants opinions in the workshops, it was possible to understand that the elderly care in the emergency department must have as its basis the knowledge, humanization and focus on the patient, along with structural elements such as the staff training, commitment, respect, patience, active hearing and critical sight. This set of aspects is regarded as the key for reaching the care excellence.The results from these three stages were the background for establishing and validating a protocol for elderly admission, that being the main product of this study. The elderly care in the emergency department was highlighted as a challenge for professionals, both as when it comes to specific characteristics of this care and the organization of the working process. This way, the outlining of the admission protocol is a way to standardize this process and provide it with necessary guidelines to reach the excellency of care. The ACRA permitted the integration of the research and the practical field, pinpointing at how much this approach can contribute for the development of the professional in the nursing practice. Key words: Emergency Nursing. Geriatric Nursing. Health Care for Elderly.
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Igreja, Adriana da. "Produção do território turístico do Caminho do vinho, São José do Pinhais - PR." reponame:Repositório Institucional da UFPR, 2017. http://hdl.handle.net/1884/49125.
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Orientador : Prof. Dr. Marcos Aurélio Tarlombani da SilveiraDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências da Terra, Programa de Pós-Graduação em Geografia. Defesa: Curitiba, 23/05/2017
Inclui referências : f. 104-111
Resumo: Este estudo busca na Geografia as ferramentas teórico-metodológicas para apreender o fenômeno do turismo, reconhecendo-o como transformador e produtor do espaço. A proposta tem como objetivo analisar o processo de produção do território turístico do Caminho do Vinho, na Colônia Mergulhão, em São José dos Pinhais - PR, buscando contribuir para a geração e a disseminação do conhecimento sobre as transformações socioespaciais ali decorrentes dessa produção. A análise foi realizada por abordagem qualitativa, pautada em pesquisa bibliográfica e documental e em estudo de campo que possibilitou a investigação da percepção dos agentes produtores do espaço, priorizando os agentes públicos, os(as) proprietários(as) de estabelecimentos turísticos e a população residente na área de estudo. Constatou-se que a produção do território turístico do Caminho do Vinho foi resultado da soma da atratividade dos produtos e espaços de lazer da Colônia Mergulhão com o ordenamento territorial voltado ao desenvolvimento turístico por parte dos agentes públicos e, ainda, das relações estabelecidas entre as diferentes territorialidades, compondo o jogo dialógico do turismo, em que seus agentes influenciam e são influenciados na produção do espaço. Este estudo evidencia a necessária organização de ações no território turístico que promovam a valorização do patrimônio cultural e natural da Colônia Mergulhão e que fortaleçam a comunidade local como protagonista do processo de desenvolvimento. Palavras-chave: Caminho do Vinho. Território turístico. Turismo - transformações socioespaciais.
Abstract: This study uses theoretical-methodological Geography tools to understand the tourism phenomenon, recognizing it as a producer and transformer of places. This proposition aims to analyse the Caminho do Vinho tourist area creation process, in Mergulhão Colony, São José dos Pinhais, state of Paraná, and to raise knowledge and awareness about the socio-spatial transformations caused by this process. A qualitative approach was carried out in the analyses, based on bibliographic research and field survey that enabled an understanding about the factors involved in the production of space perception, prioritizing the tourist establishments owners, public officers and local residents. It was found that the Caminho do Vinho tourism territory was a sum of Colônia Mergulhão's products and leisure areas and the spatial planning focused on tourism development and, moreover, the relationship between the many territorialities, composing the dialogic play in which these factors affect and are affected by the spatial production. This study shows the need for tourism territory actions that promote the cultural and natural heritage appreciation and reinforces the local community as the key player on the development process. Keywords: Caminho do Vinho. Tourism territory. Tourism - socio-spatial transformation.
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Koehler, Jaqueline. "Os sertões e La guerra del fin del mundo : Canudos como espaço de diálogo na América Latina." reponame:Repositório Institucional da UFPR, 2017. http://hdl.handle.net/1884/49425.
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Orientador : Prof. Dr. Paulo Astor SoetheTese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Humanas, Programa de Pós-Graduação em Letras. Defesa: Curitiba, 12/04/2017
Inclui referências : f.136-141
Resumo: Euclides da Cunha, em Os sertões (1902), obra capital da literatura brasileira por colocar em xeque a ideia de nacionalidade do país, tem em La guerra del fin del mundo (1981), de Mario Vargas Llosa, uma releitura da guerra de Canudos, em que são relativizados inúmeros aspectos envolvidos no episódio. Nas obras, Canudos mostra-se como um espaço constituidor de referências para o imaginário social, um elemento como que mítico de antemão, claramente carregado de uma determinada visão do país e de sua nacionalidade: ambígua e escorregadia, pois muitas vezes inapreensível ao olhar do homem citadino. Por meio do conceito de transculturação, proposto por Ángel Rama, e da análise de Luiz Costa Lima, este trabalho propõe-se a discutir a possibilidade de relação e diálogo entre as literaturas na América Latina. Palavras-chave: Euclides da Cunha. Mario Vargas Llosa. América Latina.
Abstract: Euclides da Cunha, in Os Sertões (1902), Brazilian literature masterpiece for checkmating the country's nationality concept, finds in La guerra del fin del mundo (1981), by Mario Vargas Llosa, a rereading of the War of Canudos, wherein several aspects involving this episode are relativized. In both books, Canudos is shown as a constituting space for social imaginary references, a sort of beforehand mythic element, openly carrying a certain view on the country and its nationality: ambiguous and slippery, often inapprehensible to townsmen eyes. Based on the concept of transculturation, by Ángel Rama, and the analysis by Luiz Costa Lima, this paper aims to discuss a possible relation and dialogue between Latin America literatures. Keywords: Euclides da Cunha. Mario Vargas Llosa. Latin America.
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Silva, Zenaide Carvalho da. "Adaptação de apresentação de conteúdos de objeto de aprendizagem considerando estilos de aprendizagem." reponame:Repositório Institucional da UFPR, 2017. http://hdl.handle.net/1884/49525.
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Orientador : Andrey Ricardo PimentelTese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Exatas, Programa de Pós-Graduação em Informática. Defesa: Curitiba, 01/09/2017
Inclui referências : p. 167-175
Resumo: Os estilos de aprendizagem (EA) referem-se a preferências individualizadas de uma pessoa, em relação aos modos e formas que ela prefere aprender no processo de ensino e aprendizagem. O conhecimento dos estilos de aprendizagem permite fazer proposições para o ensino rearranjando os métodos instrucionais e as estratégias de aprendizagem. Uma das possibilidades de realizar isso é através da apresentação do conteúdo do objeto de aprendizagem (OA) usando o conhecimento sobre o estilo de aprendizagem do aluno. Isso permite oferecer aos alunos recursos educacionais digitais adaptados as suas preferências individuais de aprendizagem. Pois acreditamos que a criação de novas formas/formatos de apresentação dos conteúdos dos objetos de aprendizagem levando em consideração o EA do aluno, pode gerar uma motivação maior por parte do aluno no uso desse tipo de recurso educacional, no caso o OA, pois os alunos receberiam esse recurso adaptado de acordo com as suas preferências individuais de aprendizagem. Neste contexto, foram investigados e estudados a teoria dos EA e os seus modelos, além dos princípios da Teoria Cognitiva da Aprendizagem Multimídia (TCAM), pois eles ajudam a evitar o uso inadequado de recursos nos mais variados formatos, que podem acarretar na distração e desmotivação do aluno no uso desse tipo de recurso, podendo causar insucesso no processo de aprendizagem, e foram usados para melhorar a adaptação da apresentação dos conteúdos do OA. Foram mapeadas e associadas as características mais relevantes dos EA, com as formas mais adequadas de apresentação do conteúdo do OA para cada EA, para definir a composição do modelo de adaptação da apresentação de conteúdos do OA considerando os estilos de aprendizagem (AdaptCOAEA). Foi criado um protótipo do OA com a interface adaptada com base no EA, a partir do modelo criado para avaliação das abordagens usadas através de experimentos com alunos. Os resultados obtidos das medidas subjetivas de satisfação e de respostas emocionais do aluno, e de aspectos da usabilidade em relação a interface do OA, demonstraram que o AdaptCOAEA atingiu os resultados almejados, em relação a adequação da interface do OA de acordo com os estilos do modelo de Felder-Silverman. Portanto os resultados obtidos com essa pesquisa também espera trazer contribuições futuras no sentido de possibilitar o aumento da motivação e satisfação no uso de OA adaptados, como recurso educacional no processo de aprendizagem, tanto pelo professor como para o aluno, através do fornecimento e recebimento desses recursos educacionais, adequados as preferências individuais de aprendizagem do aluno. Palavras-chave: Estilo de Aprendizagem, Adaptação, Objeto de Aprendizagem.
Abstract: Learning styles (LS) refer to a person's individual preferences in respect to the ways and forms they prefer to learn in the teaching and learning process. Knowledge of learning styles allows to make propositions for teaching by rearranging instructional methods and learning strategies. One of the possibilities to accomplish this is through the presentation of the object learning (LO) content using knowledge about the learner's learning style. This allows students to offer digital educational resources tailored to their individual learning preferences. Because we believe that the creation of new forms / formats of presentation of the contents of the learning objects taking into account the student's learning, can generate a greater motivation on the part of the student in the use of this type of educational resource, in this case the LO, since the Students would receive this resource tailored to their individual learning preferences. In this context, the LS theory and its models, as well as the principles of the Cognitive Theory of Multimedia Learning (CTML), were investigated and studied, since they help to avoid the inappropriate use of resources in the most varied formats, which can lead to distraction and demotivation of the student in the use of this type of resource, what could cause failure in the learning process, and were used to improve the adaptation of the presentation of LO contents. The most relevant characteristics of the LS were mapped and associated with the most appropriate forms of presentations of the content of the LO for each LS, to define the composition of the adaptation model of LO content presentation considering the learning styles (AdaptCOAEA). A prototype of the LO with the interface adapted based on the LS was created, from the proposed model for evaluation of the approaches used through experiments with students. The results obtained from the subjective measures of satisfaction and emotional responses of the student, and aspects of usability in relation to the LO interface, demonstrated that AdaptCOAEA achieved the desired results, in relation to the adequacy of the LO interface according to the styles of the Felder-Silverman Model. Therefore, the results obtained with this research also hope to bring future contributions in order to increase motivation and satisfaction in the use of adapted LO as an educational resource in the learning process, both by the teacher and the student, through the provision and reception of these educational resources appropriate to individual student learning preferences. Keywords: Learning Style, Adaptation, Learning Object.
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Pakmehr, Mehrdad. "Towards verifiable adaptive control of gas turbine engines." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49025.
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This dissertation investigates the problem of developing verifiable stable control architectures for gas turbine engines. First, a nonlinear physics-based dynamic model of a twin spool turboshaft engine which drives a variable pitch propeller is developed. In this model, the dynamics of the engine are defined to be the two spool speeds, and the two control inputs to the system are fuel flow rate and prop pitch angle. Experimental results are used to verify the dynamic model of JetCat SPT5 turboshaft engine. Based on the experimental data, performance maps of the engine components including propeller, high pressure compressor, high pressure, and low pressure turbines are constructed. The engine numerical model is implemented using Matlab.
Second, a stable gain scheduled controller is described and developed for a gas turbine engine that drives a variable pitch propeller. A stability proof is developed for a gain scheduled closed-loop system using global linearization and linear matrix inequality (LMI) techniques. Using convex optimization tools, a single quadratic Lyapunov function is computed for multiple linearizations near equilibrium and non-equilibrium points of the nonlinear closed-loop system. This approach guarantees stability of the closed-loop gas turbine engine system. To verify the stability of the closed-loop system on-line, an optimization problem is proposed which is solvable using convex optimization tools. Through simulations, we show the developed gain scheduled controller is capable to regulate a turboshaft engine for large thrust commands in a stable fashion with proper tracking performance.
Third, a gain scheduled model reference adaptive control (GS-MRAC) concept for multi-input multi-output (MIMO) nonlinear plants with constraints on the control inputs is developed and described. Specifically, adaptive state feedback for the output tracking control problem of MIMO nonlinear systems is studied. Gain scheduled reference model system is used for generating desired state trajectories, and the stability of this reference model is also analyzed using convex optimization tools. This approach guarantees stability of the closed-loop gain scheduled gas turbine engine system, which is used as a gain scheduled reference model. An adaptive state feedback control scheme is developed and its stability is proven, in addition to transient and steady-state performance guarantees. The resulting closed-loop system is shown to have ultimately bounded solutions with a priori adjustable bounded tracking error. The results are then extended to GS-MRAC with constraints on the magnitudes of multiple control inputs. Sufficient conditions for uniform boundedness of the closed-loop system is derived. A semi-global stability result is proven with respect to the level of saturation for open-loop unstable plants, while the stability result is shown to be global for open-loop stable plants. Simulations are performed for three different models of the turboshaft engine, including the nominal engine model and two models where the engine is degraded. Through simulations, we show the developed GS-MRAC architecture can be used for the tracking problem of degraded turboshaft engine for large thrust commands with guaranteed stability.
Finally, a decentralized linear parameter dependent representation of the engine model is developed, suitable for decentralized control of the engine with core and fan/prop subsystems. Control theoretic concepts for decentralized gain scheduled model reference adaptive control (D-GS-MRAC) systems is developed. For each subsystem, a linear parameter dependent model is available and a common Lyapunov matrix can be computed using convex optimization tools. With this control architecture, the two subsystems of the engine (i.e., engine core and engine prop/fan) can be controlled with independent controllers for large throttle commands in a decentralized manner. Based on this D-GS-MRAC architecture, a "plug and play" (PnP) technology concept for gas turbine engine control systems is investigated, which allows us to match different engine cores with different engine fans/propellers. With this plug and play engine control architecture, engine cores and fans/props could be used with their on-board subordinate controllers ready for integration into a functional propulsion system. Simulation results for three different models of the engine, including the nominal engine model, the model with a new prop, and the model with a new engine core, illustrate the possibility of PnP technology development for gas turbine engine control systems.
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Hand, Troy S. "Self-organized traffic flows: a sequential conflict resolution approach." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49125.
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This thesis discusses the effect of sequential conflict resolution maneuvers of a continuous flow of agents through a finite control volume. Video analysis of real world traffic flows that exhibit self-organized capabilities is conducted to extract characteristics of those agents. A tool is created which stabilizes the input video and extracts motion from it using the background subtraction method. I discuss the tool in detail as I created it to be user friendly and easily modifiable for other uses. The aim of the video analysis I conduct is to determine characteristics of agents in self-organized traffic flow. Comparisons are made with agents under sequential conflict resolution schemes and those that exhibit these self-organized capabilities to determine if agents under sequential control can approach the behaviors of those in self-organized environment. Flow geometries are studied and generalized with the goal of determining stability characteristics of arbitrary flow geometries. Stability analysis includes analytical proof of bounds on the conflict resolution maneuvers.
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Tryfonidis, Michail. "A study of the rotating-stall inception in high-speed compressors." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/49925.
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Jegalian, Karin 1972. "Transition states in the evolution of the mammalian sex chromosomes." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/49625.
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Smith, C. Adair (Christina Adair) 1970. "Monument and sign : the intersection of art, advertising and protest in the public sphere." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/49725.
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Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1999.Includes bibliographical references (leaves 102-106).
In the late 20th Century, a common strategy has developed among a small but highly visible cross section of artists. They create and enact transient events, 'interventions', in public spaces in a way that both refers to the spatial language of the site and offers a critique of its dominant values. What distinguishes their work even further is their reliance on the instruments of mass media, and their interest in redefining its capabilities: the projector, the electronic sign, and the billboard are three such instruments whose potential for communication in the city have been creatively mined in their service. By exploring the ways in which these technologies may be put to new uses within the urban domain, and doing so from an interrogative standpoint, so that values, both explicit and latent, are questioned, these artists begin a process of engagement with the viewer which works to redefine the functions of the site. The intersection of the artist, the instrument, and the public sphere act, momentarily, to challenge typical notions of public space and public discourse within it. That such strategies have been adopted by commercial interests also shifts the paradigm further, and sets forth new conditions by which typical notions of public space and social action are challenged. I have chosen three cases through which to examine this process: the artists Krzysztof Wodiczko and Jenny Holzer, and the advertising campaign of the Benetton Group. My central questions around their work are as follows: what makes up the strategy of the artists and company when they put forward an impermanent critique in a public space? What "public" is being spoken to in a work like this, taking place as it does in the civic realm? Since the controversy surrounding many of the projects by Wodiczko, Holzer, and Benetton lies in the interplay between social values and spatial territory, this study also examines the wider community and institutional interests at work in the site. It traces the policies of institutions and municipalities and their role in granting or denying permission for the work, as well as the roles of stakeholders around the site in supporting or impeding it. The sites that I will discuss are Union Square Park and Tompkins Square Park, both in New York City, Times Square and 42nd Street, New York, and Bunker Hill and Monument Square in Charlestown, MA. Two defining features of these sites are that drastic changes to the built environment often took place not long after the artists enacted their projects in them, and that there is a existing conflict among stake holding groups which is often centered around it. This research seeks to determine what role the artist played in the changes to the site and the struggles over it.
by C. Adair Smith.
M.C.P.
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Tsibani, Fumene George. "A literature review of the water services education and training needs of councillors in local authorities within the context of developmental local government agenda with special reference to Northern Cape Province." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/49825.
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Thesis (MPhil) -- University of Stellenbosch, 2004.ENGLISH ABSTRACT: This study describes and analyses the water services education and training needs of councillors in local authorities in the Northern Cape to enable them to implement their legislative framework in the new dispensation in South Africa. It is the proposition of this study that during the transitional period from 1994 to 2003 and thereafter, there is a likelihood of lack of capacity in most local authorities in the Northern Cape to execute their legislative requirements. This invariably imposes leadership responsibilities upon a range of stakeholders and councillors in Local Authorities (LAs), and creates the need for a redefined model of representation on the part of councillors "from resemblance to responsibility and responsiveness" (Sartori 1968: 465). Using literature review to analyse leadership responsibilities of councillors, four priority education and training (E&T) needs of councillors have been identified: • the need to understand water services policy and business cycle within the context of decentralisation and devolution of powers and functions • to local government; • the need for water services business programme management and planning skills; • the need to understand community participation in water services development plans and development processes; and • the need for conflict-resolution skills. Based upon inferences drawn from literature evidence, it is concluded that Local Government (LG) patterns of responses involving the application of managerial and analytical principles grounded firmly in the twentieth century Organisational Development (00) and public service management experience and thoughts, can neither explain nor remedy the complex variables of Local Government Developmental Agenda (LGDA) and/or the complex array of water crises that are unfolding in Northern Cape. Thus, for water services to remain a viable "instrument of humanity" especially at a municipal level, it is concluded that more effective E&T strategies are required to equip current and future councillors with intellectual water business tools to address the complex challenges that lie before them. Furthermore, an Outcomes Based Education (OBE) action-based strategy is offered as an alternative to the current traditional training approaches in Northern Cape. It is also clear from the researcher's interpretations and analysis of LGDA variables that the water services E&T needs and the relevant "gaps" identified are not simply questions of "how to do things". Rather an OBE action-based strategy under LGDA processes involves a fundamental reorientation of all participants in E&T programme for councillors that should be relevant to the special demands of the Northern Cape LAs and councillors. The researcher makes recommendations for enriching the sociology of LG studies, to match the skills requirements, given the complexity of LGDA and numerous challenges for competent and innovative councillors in LAs. Finally, this study is not intended to be exhaustive but rather to complement a number of education and training initiatives commissioned or under preparation by water sector stakeholders in line with Skill Development Act of 1998 and SAQA of 1995 (South African Qualifications Act) processes. KEYWORDS: Best Value Regime, Local Government Developmental Agenda, Spheres of government; local government; socio-economic & political dynamics in transition; decentralisation; constitutional powers and functions of local government; education and training (E&T) needs of councillors in water services; Northern Cape Province.
AFRIKAANSE OPSOMMING: Hierdie studie beskryf en ontleed die behoefte aan onderwys en opleiding (E&T) by raadslede in plaaslike owerhede in die Noordkaap, om hul moeilike taak te kan verrig in In veranderende beleidsomgewing in Suid Afrika. Die studie besin daaroor dat daar waarskynlik gedurende die oorgangstydperk vanaf 1994 tot 2003 en ook daarna, In tekort aan bevoedgheid om hul funksies te vervul, by heelwat plaaslike owerhede in die Noordkaap bestaan. Dit is deels In gevolg daarvan dat nuwe verantwoordelikhede op die skouers van die rolspelers en raadslede in plaaslike owerhede geplaas word. Die nuwe rol van raadslede word herdefinieer vanaf verteenwoordiging na verantwoording en optrede; "from resemblance to responsibility and responsiveness" (Sartori 1968: 465). Vier belangrike areas waar onderwys- en opleidingsbehoeftes ten opsigte van die leierskapsprofiel van Raadslede bestaan, is op grond van In literatuuroorsig ge'identifiseer: • die belangrikheid daarvan om beleid- en besigheidsaspekte van die lewering van waterdienste te verstaan teen die agtergrond van desentralisering en stelselmatige afwenteling van magte en funksies na die plaaslike owerheidsvlak; • die behoefte wat bestaan aan bestuurs- en beplanningsvaardighede met betrekking tot waterdienste en water-ekonomiese aspekte; • In begrip van die rol van die plaaslike gemeenskap in beplanning en uitvoer van ontwikkelingsprojekte vir die lewering van waterdienste; • konflikhanteringsvaardighede. Na aanleiding van die getuienis uit hierdie literatuurstudie word dit duidelik dat die heersende reaksie- en besluitnemingstyle van Plaaslike Owerheid (LG) wat spruit uit beginsels van organisasie ontwerp (00) wat dateer uit die vorige eeu en die staatsdienservaring en -denke van daardie era, nie die komplekse veranderlikes van die nuwe Plaaslike Owerheid Ontwikkelingsagenda (LGDA) kan verduidelik of aanspreek nie, en dus nie geskik is om In dreigende krisis in die Noordkaap te af te weer nie. am waterdienste in die toekoms as 'n voertuig vir die opheffing van agtergeblewe gemeenskappe te kan gebruik, veral op plaaslike owerheidsvlak, is dit belangrik dat huidige en toekomstige raadslede deur middel van effektiewe onderwys - en opleidingstrategiee toegerus word met water-ekonomie kennis en vaardighede. Sodoende sal hulle die komplekse uitdagings wat aan hulle gestel word, die hoof kan bied. 'n Aksie-gerigte strategie gefundeer op 'n uitkomsgebaseerde (aBE) kurrikulum, word voorgestel as plaasvervanger vir die huidige tradisionele onderwysbenadering in die Noordkaap. Dit is duidelik uit die outeur se interpretasie en ontleding van LGDA veranderlikes, dat die ge"identifiseerde onderwys- en opleidings behoeftes en gapings 'n heeltemal nuwe benadering vereis. Die benadering behels 'n deurdagte herorienterinq tot opleidingsprogramme vir raadslede in plaaslike owerhede (LG) in die Noordkaap. Die studie dra by tot die sosiologie van plaaslike owerheidstudie, en wys op die vaardighede, vermoens en innovasie-eienskappe van raadslede wat benodig word om die kompleksiteit van LGDA en die uitdagings in plaaslike owerhede aan te spreek. Ten slotte is die studie nie bedoel om volledig te wees nie maar om wei 'n bydrae te lewer tot die onderwys- en opleidingsinisiatiewe wat voortspruit uit die aksies van belanghebbendes in die water sektor in ooreenstemming met die Wet op Vaardigheidsontwikkeling (1998) en SAKWA (1995).
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Kotze, Gerhardus Cornelis. "Die ontwikkeling van 'n produksiebeplanningsmodel vir die inmaak van appelkose by die vrugte eenheid van Tiger Brands." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/49725.
Full textAbstract:
Thesis (MBA)--Stellenbosch University, 2002.Some digitised pages may appear illegible due to the condition of the original hard copy
ENGLISH ABSTRACT: The Fruit Unit of Tiger Brands is annually responsible for the canning of 75 000 tons of fruit of which apricots constitutes approximately twenty percent. The canning of apricots is subject to a few unique challenges with regard to production planning. The challenges are the unpredictable fruit sizes, unpredictable fruit quality, unpredictable fruit degradation in cold storage, unknown starting date for production and the uncompromisable end of production before Christmas day. These uncertainties led to the fact that no formal production planning for apricots had been done in the previous years of operation. The primary aim of this study is to reduce the risks with regard to production, apricot size and apricot quality by effectively forecasting the expected nett result thereof. This will quantify the resultant products available to marketing personnel and give a measure to evaluate and control production performance. The problem is addressed by organising and presenting historical data such that forecasts of future outcomes would become possible. Clear trends are present on throughput and fruit degradation over time, making forecasting of these two uncertainties quite simple. The forecasting of fruit size is however more problematic, especially because of the lack of sufficient data. It was proposed that the four main fruit size categories be described by using probability distributions fitted over the actual data of the last four years. The large variation on these distributions, probably caused by the lack of sufficient data, rendered this method unsuitable. It was decided that the best estimate of the percentage of each fruit size to be expected, was the average of the derived distributions. The model constructed of the above forecasts is suitable for the estimating of the quantities of specific products that would be available as output from the production process. The model is however not suitable for the evaluation and control of production processes. It is proposed that evaluation and control of production be achieved by using control charts derived from the same historical data. The production control charts are constructed from actual, cumulative production output from the last four years. Linear regression was done on this data to establish a trend line with two sigma limits plotted on the same chart. These charts could be used effectively to monitor daily production output to establish if the commitment towards marketing would be achieved. The lack of data for analysis puts a question mark on the statistical significance of the model. The model is viewed to be a first step in the elimination of uncertainties of raw materials and production variances by making use of historical performance data. The model and control charts will become more and more statistically significant if future actual performance data is incorporated. The model could also be drastically improved if detailed agricultural models for the prediction of apricot size and quality, based on climatic and soil conditions during the growing period were available. The development of such models could be the subject of future studies.
AFRIKAANSE OPSOMMING: Die Vrugte eenheid van Tiger Brands is jaarliks verantwoordelik vir die inmaak van naastenby 75 000 ton vrugte. Appelkose maak twintig persent van hierdie volume uit. Die inmaak van appelkose is onderhewig aan unieke uitdagings ten opsigte van produksiebeplanning. Die uniekheid is gesetel in die onvoorspelbaarheid van vruggrootte, die jaarlikse verskille in vrugdegradering tydens opberging, die onvoorspelbaarheid van die begindatum van produksie en die absolute vereiste om voor Kersdag produksie te voltooi. Hierdie onvoorspelbaarhede het tot gevolg dat daar tot op hede geen formele produksiebeplanning vir appelkose gedoen is nie. Die primêre doelwit van die studie is om die risiko's ten opsigte van produksie, appelkoosgehalte en appelkoosgrootte te verminder, deur die impak daarvan vooruit te skat. Sodoende sal die produkte wat vir bemarking beskikbaar gestel behoort te word ook beter bekend en beheerbaar wees. Die probleem word aangespreek deur geskiedkundige data sodanig te verwerk en te organiseer dat vooruitskattings daarmee gedoen kan word. Baie duidelike tendense ten opsigte van deurset en vrugdegradering oor tyd is deur middel van die geskiedkundige data waarneembaar, wat vooruitskatting van die twee faktore redelik vergemaklik. Die vooruitskatting van vruggrootte bly egter problematies, veral as gevolg van die gebrekkige geskiedkundige data wat beskikbaar is. Daar is gepoog om die vier gespesifiseerde vruggrootte kategorieë deur middel van waarskynlikheidsverdelings te beskryf, maar die gebrekkige data en groot variasie van die data en verdelings maak die tegniek ongeskik. Gevolglik is daar besluit om slegs die gemiddeld van hierdie verdelings as 'n beste raming te gebruik van die verwagte hoeveelheid van elke vruggrootte. Die model wat uit bogenoemde manipulering van data afgelei word, word gereken geskik te wees vir die raming van hoeveelhede van spesifieke produkte wat vir verkope beskikbaar sal wees. Die model is egter onvoldoende vir produksiebeheer en evaluasie. Produksie evaluasie sal egter met behulp van produksiebeheer kaarte wat ook van geskiedkundige prestasie afgelei is, gedoen word. Die produksiebeheer kaarte is kumulatiewe werklike fabrieksprestasie waardeur 'n regressielyn gepas is, met twee sigma afwykingslyne weerskante van die regressielyn geplot. Hierdie kaarte sal gebruik word om daaglikse produksie prestasie te plot en te interpreteer of die kommitment teenoor bemarkingspersoneel steeds haalbaar sou wees. Die model en die produksiebeheer kaarte is afgelei van slegs vier vorige seisoene se produksiedata. Die tekort aan relevante data plaas die betekenisvolheid van die afleidings dus onder verdenking. Die model en kaarte word beskou as 'n eerste poging om die risiko van grondstof- en produksievariasies te verminder deur die vooruitskatting van die uitsette met behulp van geskiedkundige prestasie. Die model en kaarte sal met die inkorporering van toekomstige seisoenale data meer statisties beduidend word. Die model sou ook verbeter kon word deur detail landboukundige modelle wat appelkoos gehalte en grootte verbind met klimatologiese en grondkundige kondisies tydens die verbouingsproses van die vrugte. Hierdie verbetering word egter voorgestel vir 'n verdere studie onderwerp.
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Quiroz, Amarillas Apolonia Alicia. "CALIDAD DE VIDA EN MUJERES ADULTO MAYOR DEL GRUPO JÓVENES POR SIEMPRE." Tesis de Licenciatura, UNIVERSIDAD AUTÓNOMA DEL ESTADO DE MÉXICO, 2014. http://hdl.handle.net/20.500.11799/49225.
Full textAbstract:
Es un estudio descriptivo, de corte transeccional o transversal, ya que se recolectaron los datos en un sólo momento, el propósito fue describir la variable calidad de vida, en un grupo de personas y proporcionar la descripción de ésta. De acuerdo a las características de la información, se trabajó con estadística descriptiva a través de frecuencias y percentiles.
Esta población cuenta con preparación académica, todas saben leer y escribir, lo que se refleja en sus ingresos promedio mensuales que son de 9 mil pesos. La mayoría cuentan con servicios médicos como el ISSSTE, IMSS, ISSEMYM y Seguro Popular, que a su vez les sirven para atender las enfermedades que padecen siendo la hipertensión y la diabetes la que prevalecen principalmente.En este trabajo se describe la percepción de la calidad de vida de los adultos mayores, del sexo femenino del grupo “Jóvenes por siempre” del municipio de Toluca. Para lo cual se aplicó el instrumento InCaViSa, que está integrado por doce áreas: preocupaciones, desempeño físico, aislamiento, percepción corporal, funciones cognitivas, actitud ante el tratamiento, tiempo libre, vida cotidiana, familia, redes sociales, dependencia médica y relación con el médico.
Universidad Autónoma del Estado de México
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Enríquez, Granados Angélica. "Análisis de la condición metropolitana de la cabecera municipal de Xonacatlán, Estado de México." Tesis de Licenciatura, Universidad Autónoma del Estado de México, 2015. http://hdl.handle.net/20.500.11799/49325.
Full textAbstract:
Esta controversia de lo que es metropolitano y lo que no, se toma como una incompleta
agrupación de criterios para incorporar territorios nuevos a est
e tipo de urbanización, ya
que con solo contar con un cierto número de
habitantes
da pauta a convertir a un
territorio como metropolitano, y no se toma
n
en cuenta otra serie de características que
debería ser el punto inicial, y si no es que el más importa
nte,
para
la clasificación
correcta de municipios metropolitanos, primero los que depende a una ciudad central y
en segundo a los que se vuelven independientes por contar con las características
apropiadas, así como reconocer a los que aún les falta ser de
finidos como uno o como
otro, ya que no todos los municipios se desarrollan de la misma forma, lo que se explica
con las etapas de metropolización que diferentes autores hacen referencia.
La conformación de la
zona metropolitana de Toluca,
es vista
en primer lugar por el
Plan Regional de Desarrollo Urbano del Valle de Toluca, donde
se menciona que
está
conformada por
9
municipios
en donde se ha formado una continuidad física y
demográfica entre Toluca, Metepec, Lerma, San Mateo Atenco, Ocoyoacac,
Otz
olotepec, Xonacatlán, Zi
nacantepec y Almoloya de Juárez, describe a XonacatlánActualmente las zonas metropolitanas son una forma significativa de urbanización del territorio que se va expandiendo a gran velocidad, lo que trae como resultado la incorporación de municipios con características diferentes a una dinámica de relación y dependencia hacia una ciudad central, y en otros casos a la independización de estos territorios que presentan un desarrollo y especialización de sus características . Sin embargo es evidente que los límites marcados de la ciudad no son del todo claro s , ya que se integra a lo urbano como a lo rural como uno solo y qué dificulta el entendimiento de lo que se encuentra dentro y fuera de una metrópoli , surgiendo la necesidad de estudiar más profundamente sobre este fenómeno y más aún las características que pr esentan los municipios que las componen , siendo este punto lo que ha originado la presente investigación.
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Rico, Carbajal Nallely Monserrat, and Castañeda Selene Andrea Domínguez. "Aplicación del biosorbente modificado de POUTERIA SAPOTA, para la remoción de cadmio en solución acuosa." Tesis de Licenciatura, Universidad Autónoma del Estado de México, 2015. http://hdl.handle.net/20.500.11799/49425.
Full textAbstract:
La contaminación de los ríos se debe principalmente a la presencia de sustancias tóxicas, entre ellas se encuentran los metales pesados, tales como plomo (Pb), arsénico (As), Mercurio (Hg), etcétera.En el presente trabajo de investigación se realizó la remoción de cadmio (II) en solución acuosa a través de un biosorbente utilizando cascara de mamey ( pouteria sapota ).
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GUTIERREZ, CORTES MARIA MAGDALENA 401141, and CORTES MARIA MAGDALENA GUTIERREZ. "La producción del trabajo desprotegido, entre la acción y la estructura. Estudio de caso, talleres de calzado en San Mateo Atenco, Valle de Toluca." Tesis de doctorado, Universidad Autónoma del Estado de México, 2014. http://hdl.handle.net/20.500.11799/49125.
Full textAbstract:
La asignación de los recursos dependientes de las fuerzas del mercado y la esperanza de la inversión extranjera que le apuesta más a proyectos especulativos que a la generación de empleo han generado fracturas societarias a nivel mundial. Estas políticas en nuestro país hasta ahora, no sólo no han podido producir paralelamente crecimiento y desarrollo, sino que además han agudizado el deterioro de las condiciones de vida material de las mayorías.La discusión de la noción de trabajo informal (TI) tiene una trayectoria de más de 40 años, en relación a nuestra perspectiva consideramos pertinente aclarar que no estamos de acuerdo con la noción de trabajo informal, ya que ésta noción le da una connotación peyorativa, de estigma y no ayuda en nada a la conceptualización y comprensión del trabajo desprotegido (TD). Con esta investigación se exploró los significados que los trabajadores de la Industria del Calzado —en el Municipio de San Mateo Atenco— atribuyen a sus experiencias de realizar trabajo desprotegido, identificando las principales condicionantes de orden social y cultural que influyen en la forma en que aquellos significados son construidos.
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Magalhães, Ricardo Jorge Fernandes Campelo de. "How to Profit From Being a Liberal? Impacts of Presidential Economic Policy in the Financial Markets in America." Master's thesis, Faculdade de Economia da Universidade do Porto, 2009. http://hdl.handle.net/10216/49725.
Full text
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Lutz, Mauricio Ramos. "Uma sequência didática para o ensino de estatística a alunos do ensino médio na modalidade PROEJA." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/49625.
Full textAbstract:
O presente estudo é uma pesquisa qualitativa que teve como objetivo principal elaborar, implementar e analisar uma sequência didática envolvendo atividades de ensino de Estatística. Além disso, visou desenvolver e acompanhar as habilidades dos alunos através da coleta dos dados, tratamento, interpretação e na crítica de informações retiradas de situações cotidianas, as quais chegam até eles através dos mais variados meios de comunicação. O trabalho foi aplicado em uma turma, com 24 alunos, de Ensino Médio na modalidade PROEJA do Curso Técnico em Informática – Etapa I, do Instituto Federal Farroupilha – Campus Alegrete/RS. A importância de se realizar tal temática se deve à necessidade de incluir o ensino de Estatística na disciplina de Matemática e a carência de material didático destinado ao público em estudo. Os Parâmetros Curriculares Nacionais (1999) apontam o ensino de Estatística, a partir do Ensino Fundamental, como uma necessidade para o entendimento das relações sociais, políticas e econômicas do mundo globalizado. Para fundamentar o processo de nossa pesquisa, foram utilizados como metodologia os pressupostos da Engenharia Didática, segundo descrição feita por Artigue (1996), visto que é usada nas pesquisas de Didática da Matemática, as quais incluem uma parte experimental. Também foi usada a Teoria dos Registros de Representação Semiótica de Duval (2003) devido à relevância da conversão de registros para abordar o ensino de Estatística, a fim de construir o conhecimento do aluno. O resultado desta pesquisa aponta que o material produzido favoreceu a aprendizagem dos conteúdos de Estatística. O produto final é uma sequência didática que aborda conteúdos de Estatística em que se contempla os registros e representações da língua natural, algébrico, tabela e gráficos, os quais contribuirão para instrumentalização dos professores do Ensino Médio.The present study is a qualitative research that aimed to develop, implement, and analyze main a didactic sequence involving statistical education activities. It also aimed to develop and monitor the skills of the students through the data collection, processing, interpretation and critique of information taken from everyday situations, which reaches them through a variety of media. The work was applied in a classroom, with 24 students high school course PROEJA on Technician Computer – stage I, of the Federal Institute Farroupilha – Campus Alegrete/RS Campus. The importance of holding such a session is due to the need to include the teaching of Statistics in Math discipline and the lack of educational material for the people in the study. The National Curricular Parameters (1999) pointed out the statistical education, from elementary school, as a necessity for the understandings of social, political, and economic relationships of the globalised world. To support the process of our research have been used as Didactic Engineering methodology assumptions, according to description given by Artigue (1996), since it is used in searches of Didactics of mathematics, including an experimental part. It was also used the theory of Semiotics Representation records Duval (2003) due to relevance of converting records to approach the teaching of Statistics, in order to build the student's knowledge. The result of this survey points out that the material produced favored content learning of statistics. The final product is a didactic sequence that covers Statistical content which covers the records and representations of natural language, algebraic, graphical and table, which will contribute as material for high school teachers.
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Floriano, Fabio. "Proposta de uma nova metodologia de custeio em ambientes "just-in-time" de producao : um estudo de caso na maxion." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1993. http://hdl.handle.net/10183/49425.
Full textAbstract:
O presente trabalho parte da necessidade das empresas multiprodutoras tem de se utilizarem de métodos de custeio que sirvam de maneira simplificada e ágil na efetivação da gestão industrial, principalmente frente às mudanças geradas fruto da implementação da filosofia JUST-IN-TIME de produção. O objetivo deste trabalho é analisar a oportunidade de utilização do método Unidades de esforços de produção - UEP's em um ambiente just-in-time de produção. Para tanto, realizou-se uma adaptação do método da UEP's de forma a tentar buscar um incremento nas informações geradas, de maneira a proporcionar informações gerenciais necessárias em um ambiente just-in-time de produção, utilizando-se para isto da montagem de um sistema piloto em algumas células de fabricação de uma indústria do setor metal mecânico que utiliza a filosofia just-in-time. O trabalho apresenta uma breve discussão da problemática do custeio da produção, bem como revisão bibliográfica sobre custeio, em particular em ambientes just-in-time; o trabalho conclui, a partir da implantação do sistema piloto, com a apresentação das principais conclusões e recomendações para futuras pesquisas.
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Portela, Valdinei Fortunato. "Agricultura familiar no espaço urbano da cidade de Boa Vista - Roraima." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/49825.
Full textAbstract:
Essa dissertação trata da agricultura familiar em espaço urbano, mais especificamente na cidade de Boa Vista, capital do Estado de Roraima. A aparição do Programa Nacional de Fortalecimento da Agricultura Familiar (PRONAF) marca um momento singular na trajetória do processo de intervenção estatal na agricultura e no mundo rural do Brasil. As transformações na agricultura brasileira e a falta de estruturas mínimas de sobrevivência dos agricultores nas áreas de assentamentos agrícolas na Amazônia e, em especial no Estado de Roraima, fez com que esses trabalhadores buscassem alternativas, principalmente a migração para as áreas urbanas. As discussões sobre as transformações no espaço rural e a agricultura no espaço urbano longe de mostrarem-se consensuais encontram-se em fase de acirrado debate. Desse modo, este trabalho visa contribuir para o atual debate em torno das diferentes leituras que vem sendo efetuadas sobre a dinâmica da agricultura no Brasil, dando ênfase à agricultura nas áreas urbanas em especial na cidade de Boa Vista, estado de Roraima.This dissertation deals with the family farming in urban space, specifically in the city of Boa Vista, Roraima state capital. The appearance of the National Program for Strengthening Family Farming (PRONAF) marks a unique moment in the trajectory of the process of state intervention in agriculture and in rural areas of Brazil. The transformations in Brazilian agriculture structures and lack of minimum survival of farmers in the areas of agricultural settlements in the Amazon, and in particular, the state of Roraima, meant that these workers seek alternatives, particularly migration to urban areas. Discussions on the changes in rural areas and agriculture in the urban space is far from consensual show are being heated debate. Thus, this paper aims to contribute to the current debate about the different readings that have been made about the dynamics of agriculture in Brazil, with emphasis on agriculture in urban areas especially in the city of Boa Vista, Roraima state.
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Pontasch, Kurt Walter. "Multispecies toxicity tests using indigenous organisms: predicting the effects of hazardous materials in streams." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/49925.
Full textAbstract:
The purpose of the investigation presented in chapter 1 was to determine which of the following artificial stream designs would be most logistically simple yet effective in maintaining riffle insects during a 30-d bioassay: 1) static and no current (S-NC); 2) flow-through and no current (FT-NC); 3) static with current (S-C); or 4) flow-through with current (FT-C). Flow-through and current, when provided, were 12 ml min⁻¹ and 30 cm sec⁻¹, respectively. Streams were covered by emergence traps, and daylight equivalent lights provided a natural photoperiod. The four stream designs were evaluated in triplicate based on changes in insect species-abundances after 30 d. Test organisms were transferred to the artificial streams in rock-filled containers previously colonized for 30 d in a third-order mountain stream riffle. Relative to benthic samples taken directly from the source riffle, the artificial substrates selected for collector-filterers and against collector-gatherers. The FT-C and S-C stream designs maintained most taxa at or above initial densities. Emergent adults comprised a large proportion of mayfly and chironomid densities and must be monitored during bioassays with aquatic insects.
The Investigation reported in chapter 2 was conducted to determine if contaminant-induced changes in macroinvertebrate and periphyton communities in laboratory stream microcosms could be used to predict macroinvertebrate and periphyton responses In a natural stream receiving the same contaminant. The microcosms were dosed in quadruplicate with four (0.0, 0.1, 1.0, and 10.0%) concentrations of a complex effluent; these concentrations reflected those in the field. Mayfly densities in the microcosms were significantly (P≤0.05) reduced at 1.0 or 10.0% effluent depending on species. Hydropsychlds were not affected by the effluent, and chironomids and periphyton were stimulated. Overall, the stream microcosms accurately predicted the macroinvertebrate and periphyton response observed in the field.
Chapter 3 compared responses to a complex effluent from microcosms of indigenous macroinvertebrates and protozoans to responses observed in acute tests with Daphnia magna, Ceriodaphnia dubia and Pimephales promelas and chronic survival and reproductive tests with C. dubia The predictive utility of these various tests was then evaluated against observed effects in the receiving stream. The LC₅₀s (% effluent) from the acute tests were 63.09 for Pimephales promelas, 18.8 to 31.3 for Daphnia magna and 54.7 for Ceriodaphnia dubia. Results from 7-day chronic tests indicated that C. dubia survival was significantly (P≤0.05) affected at 30% effluent and reproduction was affected at concentrations ≥3.0% effluent. In the protozoan microcosms, community composition was significantly (P≤0.05) changed at 1.0%; while protozoan species richness was significantly reduced at 3.0% effluent. The microcosms not only were the most sensitive indicators of effluent toxicity, they also correctly predicted which indigenous organisms would be lost and which would be stimulated at various ambient concentrations of the effluent.
In the fourth chapter canonical discriminant analysis, 2 diversity indices, and 7 community comparison indices were evaluated to determine their utility in quantifying macroinvertebrate response to a complex effluent in laboratory microcosms. A permutation and randomization procedure was used to test the hypothesis of no treatment effect based on the community comparison indices. The Bray-Curtis index provided the most meaningful condensation of the data.Ph. D.
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Longo, David Joseph. "A psychosocial treatment intervention for recurrent genital herpes: an investigation of psychoneuroimmunology." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49825.
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Rigot, Sarah E. "An Embassy for Somalia; Traversing the Boundary Between the Sacred and the Profane." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/49025.
Full textAbstract:
Diametrically opposed forces, while independent, require the presence of the other to exist. Shadow is found through an absence of light. Earth exists as a result of the heavens, whether cosmologically or theologically. The following project explores dichotomies and the architectural elements that can span two disparate entities. The proposal for an embassy for Somalia strives to discover the threshold between the dualities of the Islamic faith and the profane environment. In the faith one must follow a path, whether physical or spiritual in order to find true enlightenment. By allowing the path of the thesis be the guide, the various elements of approach, entry, courtyard, garden and sacred spaces are illuminated as the thresholds between these
diametrically opposed forces of public | private, heaven | earth, sacred | profane.Master of Architecture
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Mira, González Eduardo. "Turismo, arquitectura, espacio y sociedad. Entre la modernización y la crisis." Doctoral thesis, Universidad de Alicante, 1992. http://hdl.handle.net/10045/49025.
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Magalhães, Ricardo Jorge Fernandes Campelo de. "How to Profit From Being a Liberal? Impacts of Presidential Economic Policy in the Financial Markets in America." Dissertação, Faculdade de Economia da Universidade do Porto, 2009. http://hdl.handle.net/10216/49725.
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BONACINA, FAUSTO. "The optimal generation mix for an electricity producer: the case of Italy." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2013. http://hdl.handle.net/10281/49725.
Full textAbstract:
In this work we extend the model of Roques et al. (2008) for the construction
of the optimal electricity generation portfolio. In our analysis we consider
an electricity producer, who can choose to invest both in renewable and
conventional sources. We build portfolios based on the Net Present Value
generated by the investment in a particular technology. We use Monte Carlo simulations in order to compute the NPV distributions. As an extension to Roques et al. (2008), we consider the presence of incentives for renewable
technologies. We apply our model to Italian data.
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Marcos, Vicens Sixte. "Robert Desnos romancier. Théorie et pratique du roman surréaliste des années 1920." Doctoral thesis, Universitat Autònoma de Barcelona, 2005. http://hdl.handle.net/10803/4925.
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Steedly, Drew. "Rigid Partitioning Techniques for Efficiently Generating 3D Reconstructions from Images." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4925.
Full textAbstract:
This thesis explores efficient techniques for generating 3D reconstructions from imagery. Non-linear optimization is one of the core techniques used when computing a reconstruction and is a computational bottleneck for large sets of images. Since non-linear optimization requires a good initialization to avoid getting stuck in local minima, robust systems for generating reconstructions from images build up the reconstruction incrementally. A hierarchical approach is to split up the images into small subsets, reconstruct each subset independently and then hierarchically merge the subsets. Rigidly locking together portions of the reconstructions reduces the number of parameters needed to represent them when merging, thereby lowering the computational cost of the optimization.
We present two techniques that involve optimizing with parts of the reconstruction rigidly locked together. In the first, we start by rigidly grouping the cameras and scene features from each of the reconstructions being merged into separate groups. Cameras and scene features are then incrementally unlocked and optimized until the reconstruction is close to the minimum energy. This technique is most effective when the influence of the new measurements is restricted to a small set of parameters.
Measurements that stitch together weakly coupled portions of the reconstruction, though, tend to cause deformations in the low error modes of the reconstruction and cannot be efficiently incorporated with the previous technique. To address this, we present a spectral technique for clustering the tightly coupled portions of a reconstruction into rigid groups. Reconstructions partitioned in this manner can closely mimic the poorly conditioned, low error modes, and therefore efficiently incorporate measurements that stitch together weakly coupled portions of the reconstruction. We explain how this technique can be used to scalably and efficiently generate reconstructions from large sets of images.
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槇本, 直子. "豊かな生命観をめざして : 教科通信による高校選択生物の授業(理科)(教科研究)." 名古屋大学教育学部附属中学校 : 名古屋大学教育学部附属高等学校, 1991. http://hdl.handle.net/2237/4925.
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Osborne, Edith Marie. "Metal interactions and activities of truncated and extended hammerhead ribozyme constructs." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4925.
Full textAbstract:
The hammerhead ribozyme (HHRz) catalyzes a site-specific
phosphodiester bond cleavage reaction that is enhanced by the presence of
metal cations. Metal cations are thought to aid in the folding and possibly the
catalytic mechanism of this ribozyme. The goal of this research is to characterize
the activities and metal interactions of minimal and extended HHRz constructs
using kinetic and spectroscopic studies.
Metal binding to the cleavage site of the HHRz was probed using 31P
NMR to monitor Cd2+ titrations of HHRzs with a phosphorothioate modification at
the cleavage site. Either a 2'-F or a 2'-NH2 substitution at the nucleophile
position was used to block cleavage. With a 2'-F, no metal binding to the
cleavage site phosphate was observed. However, with a 2'-NH2 substitution, a
large change in 31P chemical shift of the phosphorothioate peak suggests Cd2+
binding. A 2'-NH2 is a potential metal ligand, but a 2'-F is not. This suggests that
a metal ion binds to the cleavage site phosphate when the 2' nucleophile
position also provides a ligand. Minimal HHRzs with only one stem loop structure show little activity in
presence of physiologically relevant concentrations of divalent cations. A kinetic
and thermodynamic characterization of an extended HHRz derived from
Schistosoma mansoni with loops in stems I and II was performed. High catalytic
activity was observed with low concentrations of divalent cations, and loss of
potential loop-loop interactions resulted in a large decrease in activity.
An electrostatic surface plot of a HHRz crystal structure revealed an area
of high negative electrostatic potential in the cleft between stems I and II with
contributions from nucleotides U7, A6, and C17 of the HHRz that could serve to
trap metal ions. To probe this putative metal site, kinetic studies of HHRz
constructs with phosphorothioate substitutions 5' to U7 or C17 or with an A6 2'-
OMe substitution were performed. Results of these studies suggest that a metal
interaction at this site would include direct coordination to A6 2'-OH, but indirect
interactions with the phosphates.
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Pearce, Jacqueline Winona. "Detection of Leptospira interrogans in fixed equine eyes affected with end-stage equine recurrent uveitis." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4925.
Full textAbstract:
Thesis (M.S.)--University of Missouri-Columbia, 2007."May 2007" The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Includes bibliographical references.
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Arthur, Jarred Bradley. "The influence of upstream forest on macroinvertebrate communities in pastoral landscapes." Thesis, University of Canterbury. School of Biological Sciences, 2010. http://hdl.handle.net/10092/4925.
Full textAbstract:
The conversion of native forest to agricultural land has been an on-going issue threatening the health of New Zealand’s freshwater systems. However, despite the fact that this has been occurring since early European settlement, our understanding of the mechanistic relationships between riparian vegetation and stream condition are poorly developed. This research investigated: (i) how forests affect downstream benthic macroinvertebrate communities in pasture and the environmental factors driving community change; (ii) how upstream forest size impacted the rate of change in downstream environmental drivers and associated macroinvertebrate community structure; and (iii) whether the addition of coarse particulate organic matter (a single potential driver of forest community structure) can reset community structure to that of a forested state. Physico-chemical conditions, basal energy resources, and macroinvertebrates were surveyed in several New Zealand headwater streams.
At Mount Egmont National Park, 10-12 sites were surveyed across a longitudinal forest-pasture gradient in each of five streams flowing from continuous forest to dairy farmland. My results showed that forests can have marked effects downstream. From the forest edge, water temperatures increased consistently, with a rise of approximately 0.2ºC per 100 m of downstream distance. By contrast, coarse particulate organic matter (CPOM) decreased rapidly downstream of the forest, however, low levels of “forest-derived” CPOM were still present 300m downstream from the forest edge. These environmental changes drove significant shifts in macroinvertebrate community structure. Moreover, pasture communities were
markedly different from those in forest, despite being only 100 m from the forest edge. In particular, total macroinvertebrate and EPT richness and densities decreased,
and communities shifted from evenly distributed allochthonous-based communities to autochthonous-based communities, highly dominated by molluscs (e.g., Potamopyrgus spp.)
Subsequent surveys of 6-8 sites across a longitudinal forest-pasture gradient in each of eleven streams flowing from forest fragments of different sizes into grazed
pastures throughout the Canterbury region, indicated that stream temperature increased more rapidly downstream of small- and medium-sized fragments, than larger fragments. A Berger-Parker dominance index also indicated that macroinvertebrates responded principally to water temperature, with communities being more highly dominated by temperature-tolerant molluscs in streams flowing from small-sized forest fragments.
Several headwater streams in Canterbury were also highly retentive, with marked CPOM rarely exported beyond 50 m downstream of the forest. Experimental additions of leaf litter to the pasture reaches of the same streams dramatically increased amounts of stored benthic CPOM. Although non-significant, trends indicated that EPT and shredder densities increased at litter addition sites, providing promise that CPOM can function as a mechanism directly enhancing healthy stream communities. My findings support the contention that when the replanting of entire
stream reaches is infeasible, the use of riparian management strategies which focus on the planting of intermittent patches along stream banks can potentially improve stream habitat and community health downstream.
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Nguyen, Thanh Thiet. "Two Essays on Stock Repurchases-The Post Repurchase Announcement Drift: An Anomaly in Disguise? and Intra Industry Effects of IPOs on Stock Repurchase Decisions." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4925.
Full textAbstract:
We reexamine the stock price drifts following open-market stock repurchase announcements by differentiating actual repurchases from repurchase announcements and by controlling for the repurchasing firms' earnings improvement in the announcement year relative to the prior year. Our results show that only firms that actually repurchase their shares exhibit a positive post-announcement drift. More importantly, we find that these repurchasing firms have the same post-announcement drift as their matching firms that have similar size and earnings performance but do not repurchase. Further analysis indicates that the post-repurchase announcement drift is not a distinct anomaly but the well-documented post-earnings announcement drift in disguise. In addition, previous studies suggest that the market perceives IPOs as bad news (i.e., competitive threats) to existing firms in the same industry. At the same time, the market has a tendency to be overly optimistic about IPO prospects, especially during hot IPO markets. Thus, the negative industry rival reaction could be the result of investors' over-optimism toward the IPOs' growth prospects and underestimation of the competitive positions of industry rivals. Our findings show that rival firms use repurchases as a means to signal their firm quality, as well as to correct the market's overreaction to the bad news. These IPO-induced repurchases are stronger when the rival firms are in a concentrated industry and experienced poor stock performance in the previous year.
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Visser, Christoffel Dawid. "Prescribing patterns of benzodiazepines : a comparative study between two provinces in South Africa / C.D. Visser." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4925.
Full textAbstract:
Background: In 2007 the population density for the Gauteng Province was 614 persons per km2 and in the Northern Cape Province it was 2.9 persons per km2 . High population density leads to an increase in crime. This was evident in the percentage distribution of total crime reported from 2000 to 2003 of 27.4% in Gauteng Province, while the percentage distribution of total crime reported in the Northern Cape for the same period of time was 2,8%. Stress and insomnia can be caused by crime which is influenced by population density. Crime and high population density, may cause stress and fear, which may lead to insomnia and anxiety, which in turn may lead to an increase in benzodiazepine usage. Objective: The general objective of this study was to investigate the benzodiazepine usage in the private health care sector in South Africa based on age, sex, geographical areas, prescriber type and days between refills. Methods: The data were obtained from a medicine claims database of a pharmacy benefit management company covering the periods from 1 January 2006 to 31 December 2006 and 1 January 2008 to 31 December 2008. The statistical analysis was performed by making use of the Statistical Analysis System®. A drug utilisation review was performed. Results: Patients claiming benzodiazepines represented about 7.25% of all patients in total database in 2006 and 7.97% in 2008. Female patients claimed more benzodiazepines than male patients in both Gauteng (67.24% in 2006 & 67.36% in 2008 respectively) and Northern Cape Province (67.77% in 2006 & 67.70% in 2008 respectively). Patients aged 40 years to 65 years claimed the highest number of benzodiazepine items, while patients younger than 12 years claimed the lowest number of benzodiazepine items.
The number of patients that claimed benzodiazepines in the Northern Cape was lower than those in Gauteng. The percentage of patients that claimed benzodiazepines in 2006 was 7.91% in Gauteng versus 8.96% in Northern Cape. In 2008 the percentage of patients that claimed benzodiazepines was 8.47% in Gauteng versus 9.51% in Northern Cape. The percentage of benzodiazepine prescriptions claimed in Gauteng was 4.79% in 2006 and 5.10% in 2008. In the Northern Cape the percentages of benzodiazepine prescriptions claimed in 2006 and 2008 were 4.62% and 4.30% respectively. General medical practitioners prescribed most of the benzodiazepine prescriptions in both Northern Cape and Gauteng Province. Trade name products that were mostly prescribed in the Gauteng was Adco–Alzam® 0.5 mg and in the Northern Cape it was Brazepam® 3 mg for both 2006 and 2008. Conclusion: The difference in the prescribing patterns of benzodiazepines in Gauteng and the Northern Cape was not statistically significant. Recommendations for future research were made.Thesis (M.Pharm (Pharmacy Practice))--North-West University, Potchefstroom Campus, 2011.