Dissertations / Theses on the topic 'Federated systems'
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Fernandez, George, and gfernandez@rmit edu au. "A federated approach to enterprise integration." Swinburne University of Technology, 2006. http://adt.lib.swin.edu.au./public/adt-VSWT20060502.113336.
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In order to remain competitive, the integration of their information systems is an imperative
for many large organisations. Applications that originally have been developed independently
are now required to interoperate to support new or different functions of the enterprise. Although
the mechanisms for application interoperation exist provided by the technology, due to
the sheer number and complexity of the running systems, integration solutions � centralised or
distributed�appropriate at the local level do not translate successfully to the whole enterprise.
Centralised integration approaches often satisfy only some of the integration requirements, they
are very expensive, and are fraught with danger since they imply an �all or nothing� approach.
Distributed approaches, on the other hand, suffer from complexity and scalability problems as
the number of system interfaces to be implemented and the number of execution-time invocations
grows with the number of component applications.
This dissertation makes a contribution to the field of Enterprise Application Integration (EAI)
within the framework of distributed systems technology. Based on real-life case studies experience,
we present here a federated approach that controls the size and complexity of the
integration effort by reusing existing systems as much as possible and reducing the number of
interacting applications. Only selected local elements are exposed to the organisational milieu,
and a consistent supporting infrastructure is provided to make systems interactions possible.
Our approach provides a flexible and scalable strategy to enterprise integration, avoiding the
shortcomings of traditional approaches. We respect existing organisational structures, and
demonstrate how appropriate federation infrastructure and protocols enable the interoperation
of existing systems. The three main facets of enterprise knowledge are systematically incorporated
into the integration effort: a) by the use of domain ontologies to support data integration;
b) by the development of a methodology to include business rules; and c) by the development
of FEW, a federated workflow model to implement the business processes of the organisation.
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Nizamani, Hyder Ali. "Modelling architectures of federated identity management systems." Thesis, University of Leicester, 2012. http://hdl.handle.net/2381/10180.
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Today’s dynamic and scalable collaborative systems demand not only to deal with functional but also some non-functional (e.g., security) requirements. For a secure inter-organisational collaboration scenario, Federated Identity Management systems (FIMs) provide a suitable mechanism to deal with access control. FIMs enable users of an organisation to access resources (or services) of the other trusted organisations in a secure and seamless way. More precisely, FIMs allow cross-domain user authentication to enable access control across organisations under the concept known as Circle of Trust (CoT). Patterns of FIMs emerged as recurring CoT scenarios due to the fact that each of these patterns has different security requirements. More importantly, organisations may join up or leave the CoT during the development life-cycle. Such a change in a FIM system may have an impact on its security requirements. Therefore, it is important to formally describe architectural and reconfiguration aspects of FIMs by considering their patterns. To this purpose, we propose • two UML models for FIMs where one model uses the standard UML notations to describe architectural aspects of FIMs while the other uses the UML profile in [33] to describe those aspects of FIMs together with their reconfigurations • a formal model for FIMs in ADR (Architectural Design Rewriting) to characterise their patterns by describing an architectural style together with style-preserving reconfigurations. We also study the adequacy of UML to describe architectural aspects of systems and compare it with ADR. Our comparison develops through the modelling of architectural and reconfiguration aspects of FIMs. In ADR, these aspects of FIMs are suitably represented through style-consistent (graphical) designs in terms of ADR productions. On the other hand, UML has limitations in expressing constraints over complex associations; also, UML seems to provide unsatisfactory support for presenting architectural styles in a general way. Overall, our investigation shows that UML has some drawbacks due to the complexity of diagrams, their proliferation, and the lack of a precise semantics that consistently relates them. ADR gives precise and simpler specifications for architectural design.
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Dzikiewicz, Joseph. "Cyrano : a meta model for federated database systems /." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11082006-133632/.
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Sayar, Ahmet. "High performance, federated, service-oriented geographic information systems." [Bloomington, Ind.] : Indiana University, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3344771.
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Thesis (Ph.D.)--Indiana University, Dept. of Computer Science, 2009.Title from PDF t.p. (viewed on Oct. 8, 2009). Source: Dissertation Abstracts International, Volume: 70-02, Section: B, page: 1135. Adviser: Geoffrey C. Fox.
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Gupta, Ankush M. "Cross-engine query execution in federated database systems." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106013.
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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 47-48).
Duggan et al.have created a reference implementation of the BigDAWG system: a new architecture for future Big Data applications, guided by the philosophy that "one size does not fit all." Such applications not only call for large-scale analytics, but also for real-time streaming support, smaller analytics at interactive speeds, data visualization, and cross-storage-system queries. The importance and effectiveness of such a system has been demonstrated in a hospital application using data from an intensive care unit (ICU). In this report, we implement and evaluate a concrete version of a cross-system Query Executor and its interface with a cross-system Query Planner. In particular, we focus on cross-engine shuffle joins within the BigDAWG system.
by Ankush M. Gupta.
M. Eng.
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Smith, Arthur M. D. "A Study on Federated Learning Systems in Healthcare." Youngstown State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1629188090536169.
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Carlsson, Robert. "Privacy-Preserved Federated Learning : A survey of applicable machine learning algorithms in a federated environment." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-424383.
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There is a potential in the field of medicine and finance of doing collaborative machine learning. These areas gather data which can be used for developing machine learning models that could predict all from sickness in patients to acts of economical crime like fraud. The problem that exists is that the data collected is mostly of confidential nature and should be handled with precaution. This makes the standard way of doing machine learning - gather data at one centralized server - unwanted to achieve. The safety of the data have to be taken into account. In this project we will explore the Federated learning approach of ”bringing the code to the data, instead of data to the code”. It is a decentralized way of doing machine learning where models are trained on connected devices and data is never shared. Keeping the data privacypreserved.
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Ince, Levent. "The role of expert systems in federated distributed multi-database systems/." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA377679.
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D'Silva, Albert A. Allwyn. "Dynamic evolution of integrated schemas for federated objectbase systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ32090.pdf.
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Popfinger, Christopher [Verfasser]. "Enhanced active databases for federated information systems / Christopher Popfinger." München : GRIN Verlag, 2007. http://d-nb.info/1181206952/34.
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Yu, Zhao-Ping. "Query optimization for Federated Database Systems : the Cyrano prototype /." This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-08252008-162919/.
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Yu, Chaoping. "Query optimization for Federated Database Systems: the Cyrano prototype." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/44452.
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The purpose of this research is to improve the performance for the query processing of Cyrano, a prototype deductive object-oriented meta model for Federated Database Systems (FDBSs). The hypothesis was that query optimization techniques such as Semi-Naive algorithm and Magic-Sets Rewrite algorithm could be used to improve the performance of Cyrano prototype query processing. Query optimization has not been used for an FDBS with a deductive object-oriented meta model. Most existing FDBS query optimization techniques are for FDBSs with relational meta models.
This research involves two major stages. The first stage was to investigate the existing query processing methodologies and query optimization techniques for FDBSs, deductive databases, and object-oriented databases. The research analyzed the methodologies and techniques of representative works. Two typical systems, one from the object-oriented database family and the other from the deductive object-oriented database family, were studied and analyzed in detail. The survey showed that there had been no work reported on query optimization for FDBSs with deductive object-oriented meta models. The analysis showed that the established query optimization techniques for deductive and object-oriented databases could be viable candidates for query optimization in the Cyrano prototype.
The second stage was to develop a new query processing methodology for Cyrano based on the analytical results of the first stage. A new query processing methodology was proposed, and Semi-Naive and Magic-Sets Rewrite algorithms were employed. Experiments showed that the application of the new query processing methodology improved the performance of the Cyrano query processing up to several hundred percent. Furthermore, the new Cyrano query processing methodology is a general methodology for deductive object-oriented data models, and it can well be applied to other FDBSs with deductive object-oriented meta models.
In conclusion, the research proves that the performance of the Cyrano prototype query processing can be significantly improved with query optimization. It also suggests that query optimization will improve the performance of query processing of other FDBSs with deductive object-oriented meta models.Master of Science
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Langelaar, Johannes, and Mattsson Adam Strömme. "Federated Neural Collaborative Filtering for privacy-preserving recommender systems." Thesis, Uppsala universitet, Avdelningen för systemteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446913.
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In this thesis a number of models for recommender systems are explored, all using collaborative filtering to produce their recommendations. Extra focus is put on two models: Matrix Factorization, which is a linear model and Multi-Layer Perceptron, which is a non-linear model. With an additional purpose of training the models without collecting any sensitive data from the users, both models were implemented with a learning technique that does not require the server's knowledge of the users' data, called federated learning. The federated version of Matrix Factorization is already well-researched, and has proven not to protect the users' data at all; the data is derivable from the information that the users communicate to the server that is necessary for the learning of the model. However, on the federated Multi-Layer Perceptron model, no research could be found. In this thesis, such a model is therefore designed and presented. Arguments are put forth in support of the privacy preservability of the model, along with a proof of the user data not being analytically derivable for the central server. In addition, new ways to further put the protection of the users' data on the test are discussed. All models are evaluated on two different data sets. The first data set contains data on ratings of movies and is called MovieLens 1M. The second is a data set that consists of anonymized fund transactions, provided by the Swedish bank SEB for this thesis. Test results suggest that the federated versions of the models can achieve similar recommendation performance as their non-federated counterparts.
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Dong, Qing. "Multi-agent Based Federated Control of Large-scale Systems." Diss., Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/205438.
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Electrical EngineeringPh.D.
Large-scale systems are systems that consist of many interconnected local systems requiring a large number of state variables to control. Conventional centralized control schemes are not suitable for large-scale systems because of the complex global dynamic behavior as well as computational difficulties associated with modeling and control. In addition, implementation of traditional centralized control is problematic, since any small change in the dynamics of a local system will require a complete redesign of the controller. This research introduces the general framework of agent-based federated control, motivated by the political structure of a federal government, in which partially self-governing states are united by a federal government. Likewise, a multi-agent based federated control system is composed of local autonomous subsystems (agent based controllers) that cooperate to provide an overall (a large-scale) system behavior. In this concept, each agent-based controller maintains its own control law for its local stability. In addition, each agent has partial observations of the states of other agents, via communication networks, and executes the local control law correspondingly to satisfy the performance requirements of the overall system level. Research results are presented on the general architecture of multi-agent federated control systems and on the computation of sub-system connectivity for local and global stability. Different stability analysis methods were developed for the federated control scheme in this research. First, overall system connective stability using eigenvalue methodology via determination of the connectivity strength factors between each connected sub-system was analyzed for linear interconnected systems. In addition, Lyapunov methodology was used to evaluate system connective stability. These results were applied to stabilization control of various federated control applications. Finally, the federated control concept was extended to trajectory tracking control for nonlinear entities. Simulations were performed to show the effectiveness of the federated control algorithm throughout this research. Potential applications of multi-agent federated control exist in electric power networks, modern industrial automation, robotic systems, communication networks, economic systems, and traffic networks. This research is expected to achieve scientific and theoretical advancement in control system techniques, and satisfy the U.S. Navy's need for stability and control of future large-scale systems.
Temple University--Theses
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Toufanpanah, Monir. "Decision Support framework: Reliable Federated Single Sign-on." Thesis, Luleå tekniska universitet, Datavetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62594.
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Identity management is a critical concept for enterprises, and it has turned to more challenging issue since businesses are significantly moving towards service oriented architecture (SOA) with the aim to provide seamless service delivery to their customers, partners and employees. The organizational domains are expanded to blur the virtual borders, simplify the business collaboration and maximize opportunities in the competitive market place, which explicitly shows the essentiality for federating the identities. Real-world identity comprises of different dimensions such as Law, Business, Policy, Technology and Society, therefore reliable digital identity management and successful federation are required to take these dimensions and complexity into consideration. Considering variety of academic and industrial researches that report on remarkable demands for identity federation adoption by enterprises, this study has approached federated Identity Management from technological point of view. Technologies provide tools and mechanisms to satisfy the business requirements and enable single sign-on capability in reliable federated platform. Different authentication technologies and standards have emerged to enable federated single sign-on (FSSO) implementation as a core service of the FIdM, each with different features and capabilities. This brings more complexity and confusion for experts and decision makers for FIdM adoption and development. To overcome this obstacle and accelerate the data collection and analysis process for decision makers, this research contributes to the filed by providing a conceptual framework to simplify the analysis of underlying technology for decision making process. In this framework 1) a list of state-of-the-art requirements and mechanisms for successful identity federation and reliable SSO is elaborated, 2) Six most prevalent standard authentication technologies along with latest specifications are analysed, explained and assessed against the defined criteria, and 3) several security and privacy consideration are gathered. The usage of framework is monitored and the efficiency of it is evaluated in 2 real business case scenarios by five IT experts and the result is reported.
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Garcia, Bernal Daniel. "Decentralizing Large-Scale Natural Language Processing with Federated Learning." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278822.
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Natural Language Processing (NLP) is one of the most popular and visible forms of Artificial Intelligence in recent years. This is partly because it has to do with a common characteristic of human beings: language. NLP applications allow to create new services in the industrial sector in order to offer new solutions and provide significant productivity gains. All of this has happened thanks to the rapid progression of Deep Learning models. Large scale contextual representation models, such asWord2Vec, ELMo and BERT, have significantly advanced NLP in recently years. With these latest NLP models, it is possible to understand the semantics of text to a degree never seen before. However, they require large amounts of text data to process to achieve high-quality results. This data can be gathered from different sources, but one of the main collection points are devices such as smartphones, smart appliances and smart sensors. Lamentably, joining and accessing all this data from multiple sources is extremely challenging due to privacy and regulatory reasons. New protocols and techniques have been developed to solve this limitation by training models in a massively distributed manner taking advantage of the powerful characteristic of the devices that generates the data. Particularly, this research aims to test the viability of training NLP models, in specific Word2Vec, with a massively distributed protocol like Federated Learning. The results show that FederatedWord2Vecworks as good as Word2Vec is most of the scenarios, even surpassing it in some semantics benchmark tasks. It is a novel area of research, where few studies have been conducted, with a large knowledge gap to fill in future researches.Naturlig språkbehandling är en av de mest populära och synliga formerna av artificiell intelligens under de senaste åren. Det beror delvis på att det har att göra med en gemensam egenskap hos människor: språk. Naturlig språkbehandling applikationer gör det möjligt att skapa nya tjänster inom industrisektorn för att erbjuda nya lösningar och ge betydande produktivitetsvinster. Allt detta har hänt tack vare den snabba utvecklingen av modeller för djup inlärning. Modeller i storskaligt sammanhang, som Word2Vec, ELMo och BERT har väsentligt avancerat naturligt språkbehandling på senare tid år. Med dessa senaste naturliga språkbearbetningsmo modeller är det möjligt att förstå textens semantik i en grad som aldrig sett förut. De kräver dock stora mängder textdata för att bearbeta för att uppnå högkvalitativa resultat. Denna information kan samlas in från olika källor, men ett av de viktigaste insamlingsställena är enheter som smartphones, smarta apparater och smarta sensorer. Beklagligtvis är det extremt utmanande att gå med och komma åt alla dessa uppgifter från flera källor på grund av integritetsskäl och regleringsskäl. Nya protokoll och tekniker har utvecklats för att lösa denna begränsning genom att träna modeller på ett massivt distribuerat sätt med fördel av de kraftfulla egenskaperna hos enheterna som genererar data. Särskilt syftar denna forskning till att testa livskraften för att utbilda naturligt språkbehandling modeller, i specifika Word2Vec, med ett massivt distribuerat protokoll som Förenat Lärande. Resultaten visar att det Förenade Word2Vec fungerar lika bra som Word2Vec är de flesta av scenarierna, till och med överträffar det i vissa semantiska riktmärken. Det är ett nytt forskningsområde, där få studier har genomförts, med ett stort kunskapsgap för att fylla i framtida forskningar.
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Cetin, Burak. "Wireless Network Intrusion Detection and Analysis using Federated Learning." Youngstown State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1588778320687729.
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Warnest, Mathew. "A collaboration model for national spatial data infrastructure in federated countries." Connect to thesis, 2005. http://repository.unimelb.edu.au/10187/1518.
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Spatial information is increasingly acknowledged as a national resource essential for sustainable development. Spatial Data Infrastructure (SDI) is part of the basic infrastructure that needs to be efficiently coordinated and managed in the interests of the nation. However, there is no framework or adequate knowledge available for users, providers and administrators of SDI to collaborate effectively to build National SDI. In countries that are a federation of states, administration is dispersed across multiple tiers of government. The system of governance and constitution in a federated country makes the coordination of spatial activities in the national interest complex. (For complete abstract open document)
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Liaquat, Saad. "Federated broker model for context provisioning in large-scale distributed context-aware systems." Thesis, University of the West of England, Bristol, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.572893.
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Context-awareness is a computer science concept that aims to enhance the usability of computing systems for users by unobtrusively providing services based on user and environmental context. Experimental context- aware systems typically constitute the functions of data acquisition, reasoning, context representation, context storage and context dissemination. Due to the mobile and spatial nature of the computational actors context-aware systems are usually designed with distributed software components. This distribution presents challenges in context provisioning, that is. the coordination and communication of contextual information between distributed components of the system. One of the main challenges is the diversity of settings in which context-awareness functions take place, highlighted by the heterogeneity of devices and the fluid pattern of human behaviour. Moreover, as mobile devices increasingly become the primary tool of user interaction with the environment, the complexity to adequately support awareness for diverse context applications, poses a crucial challenge in development of a large-scale context provisioning systems .. Many prototype context-aware systems have been developed that showcase context-awareness in one application domain or other but large- scale context provisioning, which also facilitates the emerging cognitive role of mobile devices, has proved elusive so far due to multi-faceted challenges in this area. Most of the research in the domain of context-aware computing focuses on context creation, prototyping context-aware applications and context use, while the challenges posed by large-scale context provisioning in such systems have not been adequately addressed. The common theme in existing efforts into developing context-aware systems has been the centralisation of the context management component that acquires, processes and distributes context information. In order to seamlessly coordinate and disseminate contextual information in a large-scale ubiquitous computing environment, a context provisioning approach is required that can overcome scalability, heterogeneity and coordination related challenges. These challenges are addressed in this work and a distributed context provisioning model is presented that can 1) disseminate multi-domain context over a large (geographic or network) scale, 2) provide coordination of context between distributed con- text producing and consuming components, 3) scale well with the increase in the system load due to context related traffic and 4) facilitate user and device mobility within the distributed system. The large-scale context provisioning model proposed by this work, entitled the Context Provisioning Architecture, is based on a federation of context brokers and uses a publish/subscribe based context coordination and communication mechanism. This thesis presents the theoretical modelling and practical implementation of the inter-broker routing of context subscriptions and notifications, management of component mobility, context modelling and context caching. Our proposed federated broker model is the first practical demonstration of federated context brokers for large-scale context provisioning. The load scalability aspect of our proposed model is experimentally evaluated against that of a centralised broker based model and the results demonstrate the improved scalability of the federated broker model. This work also proposes and demonstrates the concept of a context brokering component to manage and facilitate the evolving role of mobile devices towards cognitive context-aware devices.. The novel Mobile Context Broker component reduces the functional burden on mobile device based context consuming/providing applications. Our empirical evaluation shows a significant reduction in average energy consumption on mobile devices during the execution of context-awareness related functions in presence of the Mobile Context Broker. A minor contribution of this thesis is the use and comparison of cache replacement policies that can be utilised in a context caching component of the system. Our experiments reveal that caching is a viable strategy for improving the scalability of a context provisioning system and different cache replacement policies can be utilised within this strategy. Furthermore, this work also demonstrates a unified context model that is used not only for context representation but also for context coordination across distributed context brokers and context consuming/providing applications. Collectively, these contributions provide a holistic architectural level support and conceptual foundation that can serve as a guideline for designing large-scale context provisioning systems.
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Feraudo, Angelo. "Distributed Federated Learning in Manufacturer Usage Description (MUD) Deployment Environments." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
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Il costante avanzamento dei dispositivi Internet of Things (IoT) in diversi ambienti, ha provocato la necessità di nuovi meccanismi di sicurezza e monitoraggio in una rete. Tali dispositvi sono spesso considerati fonti di vulnerabilità sfruttabili da malintenzionati per accedere alla rete o condurre altri attacchi. Questo è dovuto alla natura stessa dei dispositivi, ovvero offrire servizi aventi a che fare con dati sensibili (p.es. videocamere) seppur con risorse molto limitate. Una soluzione in questa direzione, è l'impiego della specifica Manufacturer Usage Description (MUD), che impone al maufacturer dei dispositivi di fornire dei file contenenti un particolare pattern di comunicazione che i dispositivi da lui prodotti dovranno adottare. Tuttavia, tale specifica riduce solo parzialmente le suddette vulnerabilità. Infatti, diventa inverosimile definire un pattern di comunicazione per dispositivi IoT aventi un traffico di rete molto generico (p.es. Alexa). Perciò, è di grande interesse studiare un sistema di anomaly detection basato su tecniche di machine learning, che riesca a colmare tali vulnerabilità.
In questo lavoro, verranno esplorate tre prototipi di implementazione della specifica MUD, che si concluderà con la scelta di una tra queste. Successivamente, verrà prodotta una Proof-of-Concept uniforme a tale specifica, contenente un'ulteriore entità in grado di fornire maggiore autorità all'amministratore di rete in quest'ambiente. In una seconda fase, verrà analizzata un'architettura distribuita che riesca ad effettuare learning di anomalie direttamente sui dispositivi sfruttando il concetto di Federated Learning, il che significa garantire la privacy dei dati. L'idea fondamentale di questo lavoro è quindi quella di proporre un'architettura basata su queste due nuove tecnologie, in grado di ridurre al minimo vulnerabilità proprie dei dispositivi IoT in un ambiente distribuito garantendo il più possibile la privacy dei dati.
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Ariyattu, Resmi. "Towards federated social infrastructures for plug-based decentralized social networks." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S031/document.
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Dans cette thèse, nous abordons deux problèmes soulevés par les systèmes distribués décentralisés - le placement de réseaux logiques de façon compatible avec le réseau physique sous-jacent et la construction de cohortes d'éditeurs pour dans les systèmes d'édition collaborative. Bien que les réseaux logiques (overlay networks) été largement étudiés, la plupart des systèmes existant ne prennent pas ou prennent mal en compte la topologie du réseau physique sous-jacent, alors que la performance de ces systèmes dépend dans une grande mesure de la manière dont leur topologie logique exploite la localité présente dans le réseau physique sur lequel ils s'exécutent. Pour résoudre ce problème, nous proposons dans cette thèse Fluidify, un mécanisme décentralisé pour le déploiement d'un réseau logique sur une infrastructure physique qui cherche à maximiser la localité du déploiement. Fluidify utilise une stratégie double qui exploite à la fois les liaisons logiques d'un réseau applicatif et la topologie physique de son réseau sous-jacent pour aligner progressivement l'une avec l'autre. Le protocole résultant est générique, efficace, évolutif et peut améliorer considérablement les performances de l'ensemble. La deuxième question que nous abordons traite des plates-formes d'édition collaborative. Ces plates-formes permettent à plusieurs utilisateurs distants de contribuer simultanément au même document. Seuls un nombre limité d'utilisateurs simultanés peuvent être pris en charge par les éditeurs actuellement déployés. Un certain nombre de solutions pair-à-pair ont donc été proposées pour supprimer cette limitation et permettre à un grand nombre d'utilisateurs de collaborer sur un même document sans aucune coordination centrale. Ces plates-formes supposent cependant que tous les utilisateurs d'un système éditent le même jeu de document, ce qui est peu vraisemblable. Pour ouvrir la voie à des systèmes plus flexibles, nous présentons, Filament, un protocole décentralisé de construction de cohorte adapté aux besoins des grands éditeurs collaboratifs. Filament élimine la nécessité de toute table de hachage distribuée (DHT) intermédiaire et permet aux utilisateurs travaillant sur le même document de se retrouver d'une manière rapide, efficace et robuste en générant un champ de routage adaptatif autour d'eux-mêmes. L'architecture de Filament repose sur un ensemble de réseaux logiques auto-organisées qui exploitent les similarités entre jeux de documents édités par les utilisateurs. Le protocole résultant est efficace, évolutif et fournit des propriétés bénéfiques d'équilibrage de charge sur les pairs impliquésIn this thesis, we address two issues in the area of decentralized distributed systems: network-aware overlays and collaborative editing. Even though network overlays have been extensively studied, most solutions either ignores the underlying physical network topology, or uses mechanisms that are specific to a given platform or applications. This is problematic, as the performance of an overlay network strongly depends on the way its logical topology exploits the underlying physical network. To address this problem, we propose Fluidify, a decentralized mechanism for deploying an overlay network on top of a physical infrastructure while maximizing network locality. Fluidify uses a dual strategy that exploits both the logical links of an overlay and the physical topology of its underlying network to progressively align one with the other. The resulting protocol is generic, efficient, scalable and can substantially improve network overheads and latency in overlay based systems. The second issue that we address focuses on collaborative editing platforms. Distributed collaborative editors allow several remote users to contribute concurrently to the same document. Only a limited number of concurrent users can be supported by the currently deployed editors. A number of peer-to-peer solutions have therefore been proposed to remove this limitation and allow a large number of users to work collaboratively. These decentralized solution assume however that all users are editing the same set of documents, which is unlikely to be the case. To open the path towards more flexible decentralized collaborative editors, we present Filament, a decentralized cohort-construction protocol adapted to the needs of large-scale collaborative editors. Filament eliminates the need for any intermediate DHT, and allows nodes editing the same document to find each other in a rapid, efficient and robust manner by generating an adaptive routing field around themselves. Filament's architecture hinges around a set of collaborating self-organizing overlays that utilizes the semantic relations between peers. The resulting protocol is efficient, scalable and provides beneficial load-balancing properties over the involved peers
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Rasiwasia, Akshay. "A Framework To Implement OpenID Connect Protocol For Federated Identity Management In Enterprises." Thesis, Luleå tekniska universitet, Datavetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-64848.
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Federated Identity Management (FIM) and Single-Sign-On (SSO) concepts improve both productivity andsecurity for organizations by assigning the responsibility of user data management and authentication toone single central entity called identity provider, and consequently, the users have to maintain only oneset of credential to access resources at multiple service provider. The implementation of any FIM and SSOprotocol is complex due to the involvement of multiple organizations, sensitive user data, and myriadsecurity issues. There are many instances of faulty implementations that compromised on security forease of implementation due to lack of proper guidance. OpenID Connect (OIDC) is the latest protocolwhich is an open standard, lightweight and platform independent to implement Federated IdentityManagement; it offers several advantages over the legacy protocols and is expected to have widespreaduse. An implementation framework that addresses all the important aspects of the FIM lifecycle isrequired to ensure the proper application of the OIDC protocol at the enterprise level. In this researchwork, an implementation framework was designed for OIDC protocol by incorporating all the importantrequirements from a managerial, technical and security perspective of an enterprise level federatedidentity management. The research work closely follows the design science research process, and theframework was evaluated for its completeness, efficiency, and usability.
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Camelo, JosÃnio Candido. "Barramento de serviÃos federados para integraÃÃo federativa de sistemas distribuÃdos." Universidade Federal do CearÃ, 2008. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2367.
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CoordenaÃÃo de AperfeiÃoamento de NÃvel SuperiorEsta dissertaÃÃo apresenta uma proposta de middleware de comunicaÃÃo baseado em Enterprise Service Bus (ESB) para sistemas federados, isto Ã, formados por sistemas de diferentes organizaÃÃes. Este trabalho nÃo aborda o problema clÃssico de sistemas federados, cujo enfoque principal à autenticaÃÃo e a seguranÃa, mas sim uma necessidade crescente de intercomunicaÃÃo de serviÃos heterogÃneos. O middleware proposto, chamado de Federated Service Bus (FSB), faz uso de ESBs internos para permitir o isolamento, aplicaÃÃo de polÃticas e roteamento de cada domÃnio que compÃe o sistema federado, visando separar interesses e evitar conflitos. Nossa proposta à modelada por redes de Petri coloridas, o que lhe atribui confiabilidade de simulaÃÃo e de validaÃÃo com base em um modelo formal matemÃtico. Assim, ganhos significativos foram obtidos na implementaÃÃo com o uso de web services e BPEL (Business Process Execution Language). A modelagem com redes de Petri coloridas nÃo sà validou o fluxo, como o documentou em detalhes e possibilitou a diminuiÃÃo no nÃmero de erros. Por fim, enquadramos o FSB em arquiteturas consolidadas com SOA (Service Oriented Achitecture), EDA (Event-Driven Architecture) e NGOSS (Next Generation Operation System and Software).
This work presents the Federated Service Bus (FSB), a communication middleware based on Enterprise Service Bus (ESB) for federated systems. We do not address the classic problem of federated systems, focused mainly on authentication and security, but a growing need for heterogeneous service intercommunication. The proposed middleware makes use of internal ESBs to allow the isolation, application of policies and routing of each domain that comprises the federal system, seeking separate interests and avoid conflicts. Our proposal is modeled using coloured Petri nets, which gives it reliability of simulation and validation based on a formal mathematical model. Thus, significant gains were achieved in the implementation with the use of web services and BPEL (Business Process Execution Language). The modeling with coloured Petri nets not only validated the flow as allowed a error reduction. Finally, the FSB is embedded with SOA (Service Oriented Achitecture), EDA (Event-Driven Architecture) and NGOSS (Next Generation Operation System and Software).
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Northridge, Jedidiah 1976. "A federated time distribution system for online laboratories." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29384.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004.Includes bibliographical references (leaves 81-82).
The iLab project began in June of 2000 with the initial goal of creating Internet accessible laboratory experiments. After the successful implementation of several distinct laboratories, the goals of the project shifted to address the design and construction of a generalized infrastructure capable of supporting a wide variety of laboratory experiments. Early experiences suggested the need for a configurable experiment scheduling system. Such a system would be particularly important in the face of expected growth: as the number of providers and consumers grew, it would become crucial to empower providers with the ability to enforce experiment usage policies, to guarantee timely lab access to clients, and to maximize resource usage whenever possible. We will explore how the present iLab infrastructure can be modified to allow for experiment scheduling. This system would be designed in keeping with two key principles: generality and architectural consistency. It would have to support disparate scheduling algorithms of varying complexity and remain faithful to the theme and priorities of the existing iLab infrastructure. Design will be based on requirements gathering and the analysis of existing remotely available experiments. Resulting changes to the iLab infrastructure will be enumerated, justified, and their ramifications discussed. This design will be implemented and considered in the same fashion. Finally, future scheduling work within the context of iLab will be described.
by Jedidiah Northridge.
S.M.
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Su, Tao. "A multi-display collaborative urban planning system with a federated architecture." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/37747.
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Neighborhood planning and design is a complex and iterative process that usually involves different stakeholders and groups with diverse interests and goals. These include developers interested in the economic opportunity of development, politicians and administrators interested in public policy values, and neighbors interested in compatibility. These stakeholders work collaboratively to negotiate a mutually acceptable proposal that fulfills many qualitative and quantitative requirements and expectations. Until now, few Planning Support Systems (PSS) were capable of supporting the complexity and interactivity of this collaborative decision making process smoothly through the whole decision making process from the initial planning phase to final completion. In our research, a multi-display, collaborative urban planning system was implemented. The system uses a multi-touch tabletop computer as a central interactive display for designing a neighborhood. Multiple additional projectors can be connected to the tabletop display to present other information, such as 3D rendering of the neighborhood or some quantitative statistics summarizing the plan. Various ways to connect multiple displays together were investigated. The final system uses a distributed, federated architecture to connect the displays through a network. Informal user feedback was gathered from different types of users. In the thesis we discuss various design issues regarding multi-display systems and tabletop urban planning systems and how they were resolved. There are a number of extensions to our new system. One is the ability to support other types of displays and input techniques, such as handheld devices or remote tabletop displays. These and other future research directions are briefly described.
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Hylock, Ray Hales. "Beyond relational: a database architecture and federated query optimization in a multi-modal healthcare environment." Diss., University of Iowa, 2013. https://ir.uiowa.edu/etd/2526.
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Over the past thirty years, clinical research has benefited substantially from the adoption of electronic medical record systems. As deployment has increased, so too has the number of researchers seeking to improve the overall analytical environment by way of tools and models. Although much work has been done, there are still many uninvestigated areas; two of which are explored in this dissertation.
The first pertains to the physical storage of the data itself. There are two generally accepted storage models: relational and entity-attribute-value (EAV). For clinical data, EAV systems are preferred due to their natural way of managing many-to-many relationships, sparse attributes, and dynamic processes along with minimal conversion effort and reduction in federation complexities. However, the relational database management systems on which they are implemented, are not intended to organize and retrieve data in this format; eroding their performance gains. To combat this effect, we present the foundation for an EAV Database Management System (EDBMS). We discuss data conversion methodologies, formulate the requisite metadata and partitioned type-sensing index structures, and provide detailed runtime and experimental analysis with five extant methods. Our results show that the prototype, EAVDB, reduces space and conversion requirements while enhancing overall query performance.
The second topic concerns query performance in a federated environment. One method used to decrease query execution time, is to pre-compute and store "beneficial" queries (views). The View Selection Problem (VSP) identifies these views subject to resource constraints. A federated model, however, has yet to be developed. In this dissertation, we submit three advances in view materialization. First, a more robust optimization function, the Minimum-Maintenance View Selection Problem (MMVSP), is derived by combining existing approaches. Second, the Federated View Selection Problem (FVSP), built upon the MMVSP, and federated data cube lattice are formalized. The FVSP allows for multiple querying nodes, partial and full materialization, and data propagation constriction. The latter two are shown to greatly reduce the overall number of valid solutions within the solution space and thus a novel, multi-tiered approach is given. Lastly, EAV materialization, which is introduced in this dissertation, is incorporated into an expanded, multi-modal variant of the FVSP. As models and heuristics for both the federated and EAV VSP, to the best of our knowledge, do not exist, this research defines two new branches of data warehouse optimization. Coupled with our EDBMS design, this dissertation confronts two main challenges associated with clinical data warehousing and federation.
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Ménudier, Henri. "Le systeme politique de la republique federale d'allemagne et son image dans les media francais." Paris 3, 1986. http://www.theses.fr/1986PA030009.
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L'analyse du systeme politique est basee sur les grands themes developpes par l'auteur, comme le poids du passe, les particularites institutionnelles et politiques de l'etat federal et la nature des problemes poses a l'etat et a la societe. Les differents types d'elections (federales,regionales,locales et europeennes) et les problemes communs a l'ensemble des elections (systeme electoral,sociologie electorale, comparaisons avec la r. D. A. ) font l'objet d'une approche systematique. Une grande importance est accordee aux rapports entre elections federales et elections regionales. Les elections servent de fil conducteur a l'etude des transformations du systeme politique de la coalition social-liberale des chanceliers brandt et schmidt au gouvernement kohl. Les elements de stabilite et de changement sont ainsi mis en evidence. Des analyses de contenu de la presse ecrite francaise eclairent quelques-uns des aspects outres ou au contraire ponderes de l'image de la republique federale d'allemagne au cours des annees 1970. Elles donnent une idee de la complexite des reactions francaises qui oscillent entre la mefiance et l'admiration. Elles apportent des elements d'information sur la genese, le deroulement et la fin des crises de confiance dans les relations franco-allemandes. Une etude systematique porte sur l'allemagne dans les programmes des trois chaines de la television francaise, de 1963 a 1984. Quatre objectifs sont poursuivis : etablir une liste assez complete des emissions sur l'allemagne, commenter brievement leur contenu, elaborer une typologie des emissions pour apprecier l'equilibre qui existe entre elles, degager des elements d'appreciation sur les particularites de l'image de l'allemagne. Ces recherches soulignent le poids considerable du passe dans la presentation des realites allemandes. Ces travaux mettent en evidence l'originalite de la republique federale d'allemagne par rapport aux regimes politiques allemands anterieurs a 1945 ou par rapport a la republique democratique allemande. Ils permettent egalement d'etudier les similitudes et les differences avec les systemes politiques liberaux du monde occidentalThe analyse of the political system is based on major issues developped in the authors published work. These issues entail history, institutional and political particularities of the federal state, the role of the social forces and the nature of the problems which the state and society is confronted. The various elections (federal,regional,local and european) as well as the problems that the elections in general have in common (electoral system,electoral sociology,comparaisons with the gdr) are systematically being approached. Of great importance are the relationships between federal and regional elections. The elections are the connecting link in the study of the transformations in the political system fro the social-liberal coalition under chancellors brandt and schmidt to kohl's government. Elements of stability and transformations have thus been brought to attention. The analyses of the franch press shed light on exaggerated as well as on wellbalanced aspects of the federal republics image in the seventies. They give an idea of the complexity of french reactions that waver between distrust and admiration. They are a source of information to help explain the reasons for the development of moments of lack of confidence in french-german relationsships. Germany as portrayed on the three french television channels from 1963 to 1984 is the focus of a systematic study. There are four objectives : 1-astablish a more or less complete list of programms about germany, 2-briefly comment upon their content, 3-elaborate a general outline in order to determine whither or not there is a balance between the presentations and, finally, 4-determine to what extend particularities of the german image are appreciated. These studies underline the considerable weight of germany's past in the presentation of its realities. This ressearch portrayes the originality of the federal republic of germany in respect to german political systems before 1945 and in respect to the g. D. R. Moreover a study can be made of the differences and similarities with liberal political regimes in the western world
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Burbik, Darya. "Vyhodnocení hlavních opatření fiskální politiky Ruské federace v letech 2008 - 2011 z hlediska podnikové sféry." Master's thesis, Vysoká škola ekonomická v Praze, 2011. http://www.nusl.cz/ntk/nusl-150141.
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The objective of this thesis is the analysis of fiscal policy in the Russian Federation in 2008-2011. The thesis focuses on the beginning of the financial crisis in the Russian Federation, and then a period of economic recovery continued in the present. In the theoretical part is describing structure of the budget and its peculiar properties. Also discusses fiscal policy in the years 2008-2011. Significant emphasis is given to the analysis of changes in tax policy. The result of the analysis of fiscal policy is the evaluation of effect of the major fiscal measures during this period on the business sector.
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Lluch-Ariet, Magí. "Contributions to efficient and secure exchange of networked clinical data : the MOSAIC system." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/388037.
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The understanding of certain data often requires the collection of similar data from different places to be analysed and interpreted. Multi-agent systems (MAS), interoperability standards (DICOM, HL7 or EN13606) and clinical Ontologies, are facilitating data interchange among different clinical centres around the world. However, as more and more data becomes available, and more heterogeneous this data gets, the task of accessing and exploiting the large number of distributed repositories to extract useful knowledge becomes increasingly complex. Beyond the existing networks and advances for data transfer, data sharing protocols to support multilateral agreements are useful to exploit the knowledge of distributed Data Warehouses. The access to a certain data set in a federated Data Warehouse may be constrained by the requirement to deliver another specific data set. When bilateral agreements between two nodes of a network are not enough to solve the constraints for accessing to a certain data set, multilateral agreements for data exchange can be a solution.
The research carried out in this PhD Thesis comprises the design and implementation of a Multi-Agent System for multilateral exchange agreements of clinical data, and evaluate how those multilateral agreements increase the percentage of data collected by a single node from the total amount of data available in the network. Different strategies to reduce the number of messages needed to achieve an agreement are also considered.
The results show that with this collaborative sharing scenario the percentage of data collected dramatically improve from bilateral agreements to multilateral ones, up to reach almost all data available in the network.
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Soucat, Agnès. "Le financement communautaire des soins de sante primaire : est-il possible et equitable ? etude realisee dans le cadre du projet benino-allemand des soins de sante primaires." Nancy 1, 1990. http://www.theses.fr/1990NAN11141.
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Cakir, Ece. "Single Sign-On : Risks and Opportunities of Using SSO (Single Sign-On) in a Complex System Environment with Focus on Overall Security Aspects." Thesis, Linnéuniversitetet, Institutionen för datavetenskap (DV), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-24377.
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Main concern of this thesis is to help design a secure and reliable network system which keeps growing in complexity due to the interfaces with multiple logging sub-systems and to ensure the safety of the network environment for everyone involved. The parties somewhat involved in network systems are always in need of developing new solutions to security problems and striving to have a secure access into a network so as to fulfil their job in safe computing environments. Implementation and use of SSO (Single Sign-On) offering secure and reliable network in complex systems has been specifically defined for the overall security aspects of enterprises. The information to be used within and out of organization was structured layer by layer according to the organizational needs to define the sub-systems. The users in the enterprise were defined according to their role based profiles. Structuring the information layer by layer was shown to improve the level of security by providing multiple authentication mechanisms. Before implementing SSO system necessary requirements are identified. Thereafter, user identity management and different authentication mechanisms were defined together with the network protocols and standards to insure a safe exchange of information within and outside the organization. A marketing research was conducted in line of the SSO solutions. Threat and risk analysis was conducted according to ISO/IEC 27003:2010 standard. The degree of threat and risk were evaluated by considering their consequences and possibilities. These evaluations were processed by risk treatments. MoDAF (Ministry of Defence Architecture Framework) used to show what kind of resources, applications and the other system related information are needed and exchanged in the network. In essence some suggestions were made concerning the ideas of implementing SSO solutions presented in the discussion and analysis chapter.
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Skrebkova, Kristina. "Význam světových hotelových řetězců na rozvoj a modernizaci hotelnictví v Rusku." Master's thesis, Vysoká škola ekonomická v Praze, 2013. http://www.nusl.cz/ntk/nusl-192883.
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The aim of the thesis is to analyze the current state of the international hotel industry and possibility of using international experience for the development of the hotel industry in Russia. The thesis is divided into three chapters. In the first chapter the hotel industry is examined from a theoretical point of view. The second chapter examines the trends of the international hotel industry, including the role of international hotel chains in the world. The third chapter is focused on the analysis of the influence of international hotel chains on the development and improvement of the hotel industry in Russia.
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Borodenko, Vita. "Možnosti financování stáří v České republice a Ruské federaci." Master's thesis, Vysoká škola ekonomická v Praze, 2013. http://www.nusl.cz/ntk/nusl-194042.
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This diploma thesis deals with pension systems that are applicable in the Czech Republic and the Russian Federation and comparing available products appropriate to ensure a higher standard of living in old age. In the introductory chapter is firstly analyzed demographic development. Followed by an analysis of the current state of the pension systems, with emphasis on the changes currently being performed. The aim of this work is to model examples to present the differences in opportunities pension security in both countries.
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Souza, Cláudia Daniele de. "Impacto de las políticas brasileñas de ciencia y tecnología en la actividad investigadora de las universidades federales: un estudio cienciométrico del período 2003-2015." Universidad Carlos III de Madrid, 2018. http://deposita.ibict.br/handle/deposita/33.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Nas últimas décadas, o Brasil tornou-se um país que, apesar de suas deficiências, conseguiu avançar e fazer uso de seus recursos para expandir e aumentar sua presença na esfera internacional. Dada sua dimensão geográfica, população e peso da sua economia, esse país desempenha um papel fundamental, especialmente na região sul-americana. Desde que foi considerado parte do grupo BRICS de países emergentes, vários quadros teóricos já surgiram para explicar esse fenômeno. Foram longos anos de definição de programas e estratégias voltadas para a transformação do país de modo que, atualmente, é possível dizer que conseguiu-se capturar e reter o interesse da comunidade internacional. O delineamento de suas políticas públicas de ciência, tecnologia e inovação tem influenciado, sobretudo, a promoção da pesquisa científica, o desenvolvimento tecnológico e os processos de democratização do acesso e internacionalização da educação superior brasileira. Nesse contexto, a presente tese de doutorado apresenta-se como um estudo cientométrico cujo objetivo é analisar o impacto de três dessas políticas públicas (Programa de Apoio aos Planos de Reestruturação e Expansão das Universidades Federais, Programa Ciência sem Fronteiras e Lei de Inovação Tecnológica de 2004) na atividade de pesquisa do sistema universitário brasileiro, entre os anos 2003-2015. Por se tratar de um sistema heterogêneo, diversificado e segmentado, detalha-se no caso das 63 universidades federais. Para desenvolver o estudo, as políticas mencionadas foram analisadas para identificar seus objetivos e definir seus pontos comuns. Em seguida, elaborou-se um quadro analítico que permitiu delimitar três dimensões da atividade científica: CRESCIMENTO, QUALIDADE e INTERNACIONALIZAÇÃO. Para operacionalização, construiu-se uma matriz de indicadores de entradas (inputs) e saídas (outputs). Utilizando fontes de informação oficiais e bases de dados bibliográficas, em cada uma das dimensões abordadas, as variáveis mais relevantes foram identificadas por meio de testes estatísticos descritivos e multivariados. Embora a principal contribuição desta tese seja o desenvolvimento conceitual e metodológico, os resultados permitem observar que o crescimento e a intensidade da atividade das universidades federais, no período estudado, tem sido exponencial (em termos de número de alunos , bolsas de pesquisa, corpo docente, novas instituições criadas), bem como sua produção científica e tecnológica (publicações e patentes). Quanto à qualidade, observou-se que está crescendo, especialmente em quanto à formação de recursos humanos, mas não tanto na produção cientifica. Por outro lado, o notável impulso à internacionalização também teve resultados positivos em diferentes aspectos, como na colaboração científica com centros estrangeiros. Esses resultados mostram que o Brasil, e especialmente as universidades federais, fizeram um esforço importante para melhorar e atualizar o sistema universitário que está começando a dar frutos. Em conclusão, ressalta-se que a expansão do sistema universitário brasileiro e sua entrada na comunidade internacional já ocorreram, mas ainda faltam dar alguns passos no sentido de melhorar a qualidade.
En las últimas décadas Brasil se ha convertido en un país que a pesar de sus carencias supo salir adelante y hacer uso de sus recursos para expandirse y acrecentar su presencia en la esfera internacional. Por su dimensión geográfica, población y el peso de su economía, juega un papel fundamental especialmente en la región de América del Sur. Desde que se considera parte del grupo de países BRICS al ser una potencia emergente, ya se han ofrecido diversos marcos teóricos que buscan explicar este fenómeno. Han sido largos años de definición de programas y estrategias orientadas a transformar el país, para que hoy en día sea posible decir que ha logrado captar y retener el interés de la comunidad internacional. El delineamiento de sus políticas públicas para la ciencia, tecnología e innovación han influido sobre todo en la promoción de la investigación científica, en el desarrollo tecnológico y en los procesos de democratización de acceso y de internacionalización de la educación superior brasileña. En este contexto, la presente tesis doctoral se presenta como un estudio cienciométrico cuyo objetivo es analizar el impacto de tres de estas políticas públicas (Programa de Apoyo a los Planes de Reestructuración y Expansión de las universidades Federales, Programa Ciencia sin Fronteras y la Ley de la Innovación Tecnológica de 2004) en la actividad investigadora del sistema universitario brasileño, entre los años 2003-2015. Por ser un sistema heterogéneo, diversificado y segmentado, se profundiza en el caso de las 63 universidades federales. Para desarrollar el estudio se han analizado las políticas mencionadas para identificar sus objetivos y definir sus puntos comunes. Seguidamente se ha elaborado un marco analítico que permitió delimitar tres dimensiones: CRECIMIENTO, CALIDAD e INTERNACIONALIZACIÓN de la actividad científica, para cuya operacionalización se ha construido una matriz de indicadores de inputs y de outputs. Utilizando fuentes de información oficiales y bases de datos bibliográficas, en cada una de las dimensiones abordadas se han identificado las variables más relevantes utilizando test estadísticos descriptivos y multivariantes. Si bien el mayor aporte de la presente tesis es el desarrollo conceptual y metodológico, los resultados obtenidos permiten observar que el crecimiento y la intensidad de la actividad de las universidades federales, durante el período estudiado, ha sido exponencial (en términos de número de alumnos, becas de investigación, profesorado, instituciones creadas), al igual que su producción científica y tecnológica (publicaciones y patentes). En cuanto a la calidad, esta es creciente especialmente en la formación de recursos humanos pero no tanto en su producción. Por su parte, el notable impulso a la internacionalización, también ha tenido resultados positivos en diferentes aspectos como la colaboración científica junto a centros extranjeros. Estos resultados evidencian que Brasil, y especialmente las universidades federales, han hecho un esfuerzo importante en pos de la mejora y actualización del sistema universitario que está empezando a dar sus frutos. Como conclusiones se puede apreciar que la expansión del sistema universitario brasileño y su entrada en la comunidad internacional ya se han producido, pero queda aún por dar un paso más hacia la mejora de la calidad.
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Valentová, Emilie. "Změna kurzu ruské zahraniční politiky v 1. dekádě 21. století." Master's thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-72225.
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The aim of the diploma thesis is to identify Russia's Foreign Policy change in the first decade of the 21st century. It focuses on the three most important strategic documents of the Russian Federation, the presidential decrees signed by Vladimir Putin and Dmitri Medvedev (The Foreign Policy Concepts of the Russian Federation from 2000 and 2008, The National Security Concept of the Russian Federation from 2000, The National Security Strategy of the Russian Federation from 2009 and The Military Doctrines from 2000 and 2010). Through Discourse analysis it concludes that Russia has moved to strenghtening norms of international law and multilateral cooperation between the years 2000 and 2010, it no longer uses confrontational expressions and prefers a multi-vector foreign policy accenting the Asian vector. Russia also proves to be more self-confident and ambitious. We expect a more active role in the world affairs from Russia in the second decade of the 21st century.
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Andrusenko, Ekaterina. "Transformace sociálněekonomického systému v Ruské federaci se zaměřením na hospodářství Sverdlovské oblasti." Master's thesis, Vysoká škola ekonomická v Praze, 2013. http://www.nusl.cz/ntk/nusl-192563.
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The main objective of this thesis is to evaluate the circumstances and transition of the socio-economic system of the Russian Federation. It is also focused on the regional economy of Sverdlovsk region as a socio-economic subsystem. Uralmash plant is presented here as an example of an economic player in a process of transition. The thesis is based on several specific theories: socio-economic system and its transition, evolution of the economic systems by J. Schumpeter, social choice between chaos and dictatorship based on the new comparative economics, regionalist theory and corporate finance. It is chosen comparative-historical and empirical-statistical methodology. The main finding of the thesis is the inability of the socio-economic system of the USSR to continue in development as a result of dictatorship. However, the new Russian economy fell into a structural shift. The contribution of the thesis is a comprehensive view on transition process in Russia both at national and at regional and local level. Both theoretical and practical sites of transition are reflected. Not only macroeconomic but also microeconomic point of view is taken into account.
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Fernandez, George. "A federated approach to enterprise integration." 2006. http://adt.lib.swin.edu.au/public/adt-VSWT20060502.113336/index.html.
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Thesis (Ph.D) - Swinburne University of Technology, Faculty of Information & Communication Technologies, 2006.A thesis submitted in total fulfillment of the requirments of for the degree of Doctor of Philosophy, Faculty of Information and Communication Technologies, Swinburne University of Technology, 2006. Typescript. Bibliography p. 194-201.
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Chang, Hsiang-Meng, and 張翔猛. "Considering Efficiency and System Diversity in Federated Identity and Access Management Systems." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/58026655143267878748.
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碩士國立臺灣科技大學
資訊管理系
97
With the rapid development of information technology, organizations utilize more and more information services. However, the inconvenience of repeated log-in and the cost of managing services also increase with the growth of information services. Therefore, people proposed Single Sign-On (SSO) to enable users to access multiple services with single identity. Moreover, Federated Identity and Access Management (FIAM) systems extend SSO to provide fine-granularity access control and cross-organizational solution. Current FIAM systems emphasize the performance when deciding user privileges. However, these solutions may sacrifice the data consistency to performance. For example, an intuitive solution to to decide privileges in FIAM systems is to ask Identity Providers (IdPs) about related attributes. When Service Providers (SPs) wish to decide privileges, they send attribute requests to IdPs. When IdPs received the requests, the IdPs response the attributes wrapped in secure packages. While the data consistency is considered, the SPs must request for attributes each time when they wish to decide user privileges. This solution may be not so efficient. Another solution is based on Attribute Certificates (ACs). The IdPs embed the attributes in the user certificates. When the SPs received the certificates from users, they can decide the privileges according to the attributes embedded in the certificates. This solution reduces the cost of repeated inquiry about attributes. However, to ensure the certificates are up-to-date, the SPs must query the status of ACs through Certificate Revocation List (CRL) or Online Certificate Status Protocol (OCSP). Frequent status inquiry about certificates and certificates reissue may also lead to inefficiency. In addition to the above issues, current FIAM solutions may not consider a specific property, system diversity, of FIAM systems. Since FIAM may be applied to different systems and applications, the access patterns may be various and changeable. Therefore, traditional way to achieve data consistency may be not enough. For the above reasons, we proposed Self-Adaptive framework for Federated Identity and Access Management systems (SAFIAM). To take both efficiency and data consistency into consideration, SAFIAM distributes privilege data to SPs and preserves their data consistency in an efficient way. Moreover, to consider about the variety of access patterns, SAFIAM monitors the access patterns and choose the most efficient strategy to achieve data consistency.
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Peery, Christopher. "Wayfinder a federated information sharing and management system /." 2009. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051894.
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Popfinger, Christopher [Verfasser]. "Enhanced active databases for federated information systems / vorgelegt von Christopher Popfinger." 2006. http://d-nb.info/980553288/34.
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Wang, Ming-guo, and 王明國. "FEDERACY: AN EXTENSIBLE FEDERATED IDENTITY AND ACCESS MANAGEMENT FRAMEWORK CONSIDERING LEGACY SYSTEMS." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/67701188594218719361.
Full textAbstract:
碩士國立臺灣科技大學
資訊管理系
96
In recent years, many organizations start to deploy Identity and Access Management (IAM) or Federated Identity and Access Management (FIAM) systems to reduce the cost and security risks of using and managing different systems. While deploying the IAM or FIAM systems, organizations may usually meet difficulties in integrating legacy systems into IAM or FIAM systems. Current IAM solutions usually adopt the Web-based portal approach and require application system to support the Web-based architecture or HTTP protocol. In light of this, we propose the framework of extensible FEDerated identity and access management framework considering LegACY systems (FEDERACY). Compared to current Web-based approaches, FEDERACY adopts agent-based approach to provide a unified way for individuals to use heterogeneous legacy systems and for administrators to manage the legacy systems without modifying the systems. While the cost of integrating legacy systems to IAM systems can be reduced, FEDERACY can hopefully contribute to the realization of IAM systems.
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Hu, Jui-Chung, and 胡瑞中. "Distributed Offloading Approach to Cost Minimization in Federated Edge and Vehicular-Fog Systems." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/784m22.
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碩士國立交通大學
資訊科學與工程研究所
107
Vehicular-fog system as an emerging technology consists of vehicles with computing resources that are mostly under-utilized. Therefore, an edge system may offload some workloads for remote execution at nearby vehicular-fogs. Whether this is cost-effective depends on not only the costs and computation capacities of vehicles but also the amount of workloads and associated latency and energy constraints. In this paper, we consider a two-tier federated Edge and Vehicular-Fog (EVF) architecture and aim to minimize overall cost while meeting latency and energy constraints by setting up an appropriate offloading configuration. We present in the EFV system the basic version for single edge offloading and the extended version for multiple edge offloading. We model these two schemes to single-objective mixed integer programming problem respectively. In the basic version, we propose an iterative greedy algorithm using the queuing model to distributedly solve this problem in real time. And we extended the basic version to multiple edge scenario and propose the multi-EVF matching algorithm to carry out the conflicts between the edges based on matching theory. The experiment result shows our proposed architecture help to reduce cost by 40-45% compared to existing architecture and help the edge to provide services beyond its capacity with specified energy and latency constraint. Besides, this result also shows that our algorithms adapt well and work properly in an unpredictable and dynamic environment.
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Lin, Ming-Yi, and 林明儀. "Resource Allocation for Federated Heterogeneous Edge and Fog Systems: A Matching Game Approach." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/wq7q22.
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碩士國立交通大學
資訊科學與工程研究所
106
In the edge computing environment, the service provider can serve the devices of Internet of Things (IoT) and fog devices with extra low latency when offloading the requests to the edge servers. Nevertheless, the resource allocation with bulk of devices requesting the servers with limited capacity in edge computing for computation offloading while keeping extra low latency will become an important issue for the service providers. Also between different service providers, which service provider to federate and how much to pay for federation is also an important issue. Matching game is appropriate for allocating the requests to the servers, especially in a distributed environment. We proposed two mechanisms, intra-EFS offloading and inter-EFS offloading, of matching game for the resource allocation problem. Specifically, when the resource allocation is within the same service provider, we use matching game without monetary transfer; when the resource allocation is across different service providers, we use matching game with monetary transfer. Also we form the requests from the devices as virtual machine (VM) instances. Matching game can provide a stable result, that is, there will be no pairs of a server and a request that is mutually more favorable than their current matching result. We simulated our proposed mechanisms and showed that we can have a higher average number of served requests for the servers within the latency constraint of the requests, and have a higher revenue when considering the monetary exchange.
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Miranda, Pedro Miguel Simões. "Enabling and sharing storage space under a federated cloud environment." Master's thesis, 2015. http://hdl.handle.net/10362/18543.
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To support the Portuguese scientific community LIP, Laboratório de Instrumentação
e Física Experimental de Partículas, has been operating a high performance computing
(HPC) infrastructure under a grant from the Infraestrutura Nacional de Computação Distribuída (INCD) Program. Now, LIP is promoting another initiative towards the same
community, that is, to build a Cloud Computing (CC) service which orchestrates the
three fundamental resources: compute, network, and storage.
The main goal of this dissertation is to research, implement, benchmark and adopt
the most appropriate backend storage architecture for the OpenStack cloud computing
software service, chosen by LIP (following EGI, the European Grid Infrastructure) to be
the cloud platform to be deployed in the new CC-INCD program.
For this work, our objectives are: a) to gain an understanding of OpenStack – its architecture, and the way it works to offer an Infrastructure-as-a-Service (IaaS) platform;
b) look for candidates suitable to be deployed as OpenStack’ storage backends, which
should be able to store templates (images, in the OpenStack terminology) of virtual machines (VMs) and ISO images (CDs/DVDs), ephemeral and persistent virtual disks for VM instances, etc.; c) to present a preliminary study of three file systems that are strong candidates to be integrated with OpenStack: NFS, Ceph and GlusterFS; and, d) to choose a candidate to integrate with OpenStack, and perform an experimental evaluation.
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Lin, Hua-peng, and 林華鵬. "A Self-Adaptive and Efficient Algorithm to Achieve Strong Consistency in Federated Identity Management Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/98513892440815618268.
Full textAbstract:
碩士國立臺灣科技大學
資訊管理系
96
In recent years, Federated Identity Management (FIM) systems play an important role to allow users can access resources between service provider (SP) and identity provider (IDP) seamlessly. In this case, service providers in current FIM systems usually decide whether or not to allow the requests based on the attributes in tickets issued by trusted identity providers. Obviously, if FIM systems can not keep the consistency between the information in a ticket and the information in a person’s IDP, it may incur to make wrong privilege decision. Although we can use some mechanisms such as Certificate Revocation List (CRL) or Online Certificate Status Protocol (OCSP) to invalidate tickets, CRL and OCSP also may incur heavy network overhead to reissue whole tickets when attributes in the tickets are modified. In light of this, we propose a Self-Adaptive algorithm to achieve Strong Consistency (SASC) between the information in a ticket and the associated IDP. While there are several schemes in traditional distributed system area to achieve data consistency, our SASC can adapt itself to choose the best scheme that use smallest bandwidth based on the characteristics of network topology and access patterns about the data.
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Wang, Wei-ta, and 王唯達. "SaaS Integration and Research on Distributed and Heterogeneous Systems: A Case Study of NMTL’s Federated Search Engine." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/70811054585051700302.
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碩士國立臺南大學
資訊工程學系碩士班
98
Cloud computing creates a hardware environment of infinite scalability; it is often used to meet the requirement for Software as a Service (SaaS). However, what inside a cloud may be heterogeneous resources (or heterogeneous systems), including hardware equipments, operating systems, management platforms, program languages, databases, and so on. This fact makes system integration more challenging. For example, staffs and users in the National Museum of Taiwan Literature (NMTL) use a lot of heterogeneous systems to search data and the number of systems will increase in the future. To offer search services of high quality and high efficiency, it is necessary to develop a federated search engine (FSE) that can integrate heterogeneous systems seamlessly and can be a portal of high scalability. Moreover, most of NMTL''s databases are with non-compatible data schema. This fact also challenges the integration of heterogeneous systems. In this study, a strategy for integrating NMTL''s heterogeneous systems is proposed. Some implementation issues are also considered based on the status of these systems. Accordingly, a FSE is developed and has been in operation in NMTL. User can submit keywords in the interface; FSE will use proxy search and Ajax to perform a distributed and asynchronous query in each system. FSE uses the second entity relationship and normal form to integrate heterogeneous data responded from each system. FSE also has an XML cache database to improve the system efficiency. To evaluate FSE’s performance, the Opera Dragonfly tool is used in this study. Evaluation results show that using XML database can reduce considerable loads of FSE and each heterogeneous system, thus achieving higher query efficiency. The evaluation results are also used to the scheduling of distributed and asynchronous queries and to develop the strategy of database management.
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李靜宜. "A Study on the Acceptance and Usage Behavior of Federated Search Systems– A Case Study of MetaLib in NCTU." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/89460324367419651054.
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Huang, Chih-Chieh, and 黃志傑. "Resource Brokerage for Federated Cloud Storage System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/49057630766612178807.
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碩士國立清華大學
資訊工程學系
101
As the evolution of distributed computing systems, the need of high performance and large-scale computing is getting increase. Cloud applications or users may demand a storage system with security, availability, performance, and reliability. A variety of public cloud storage providers and private storage systems tried to meet the requirements by applying different approaches. However, no one of cloud storage providers is able to fulfil every requirement of expectations at the same time because of the CAP theorem. In addition, cloud storage providers usually offer different APIs for the access so as to lead users face an issue about vender lock-in. Leveraging heterogeneous storage resources in federated cloud storages is a prospective manner to solve these issues. In this paper, we focus on proposing a federated cloud storage system with a uniform interface. Based on a prioritized brokerage model, a resource brokerage is further presented to benefit the matchmaking with the considerations of user requirements, file classifications, and storage characteristics. We evaluate the system performance with real traces and workloads on 31 nodes. Experimental results show that our approach improve 35%~125% performance gains.
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Tzu-EnHuang and 黃子恩. "iFedMR: A Federated Hadoop System for Iterative MapReduce Applications." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/hjh6h6.
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Huang, Chao-Chi, and 黃昭棋. "A Federated Identity Assurance and Access Management System for Cloud Computing." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/kahvpa.
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博士國立臺北科技大學
機電科技研究所
99
Cloud computing is a style of computing in which dynamically scalable and often virtualized resources are provided as a service over the Internet.However, cloud computing services are still in a developmental stage; cloud computing best practices are evolving, and security is still a major concern. Furthermore, the traditional Identity and Access Management (IAM) approach cannot fit into a cloud computing platform, because the enterprise does not control the cloud service provider’s IAM practices and has even less influence over strict security practices. The system provides a solution for a Federated Identity Assurance and Access Management System in the Identity and Access Management (IAM) process for a cloud computing environment. The Federated Identity Manager described in this paper is implemented. It supports cross domain single sign-on (CD SSO) and interchanges access control information with partners, reflecting trust relationships. Four subsystems have been successfully implemented in the proposed Management System: Identity Provisioning Module, Authentication and Authorization Management Module, Federated Identity Management Module, and Assurance Management Module. The results of this research can offer better security service management framework for large scale of cloud security services.