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Tesi sul tema "Information theory"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Hjørland, Birger. "Principia Informatica. Foundational Theory of Information and Principles of Information Services." Libraries Unlimited, 2002. http://hdl.handle.net/10150/105735.

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Library and information science (LIS) may alternatively be labeled library, information and documentation studies, LID or just information science, IS. In taking IS serious as a research field, this paper presents an understanding of one of its core concepts (information) and outlines its fundamental principles. It is shown that there exist hierarchies of information processing mechanisms in nature and culture and that IS is concerned with only the highest forms of such mechanisms, which consist of libraries, electronic databases and related information services. Theories about such high-level

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2

Bond, Rachael Louise. "Relational information theory." Thesis, University of Sussex, 2018. http://sro.sussex.ac.uk/id/eprint/76664/.

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3

Sahai, Anant. "Anytime information theory." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8770.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.<br>Includes bibliographical references (p. 171-175).<br>We study the reliable communication of delay-sensitive bit streams through noisy channels. To bring the issues into sharp focus, we will focus on the specific problem of communicating the values of an unstable real-valued discrete-time Markov random process through a finite capacity noisy channel so as to have finite average squared error from end-to-end. On the source side, we give a coding theorem for such unstable processe

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4

Schumann, Robert Helmut. "Quantum information theory." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51892.

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Thesis (MSc)--Stellenbosch University, 2000<br>ENGLISH ABSTRACT: What are the information processing capabilities of physical systems? As recently as the first half of the 20th century this question did not even have a definite meaning. What is information, and how would one process it? It took the development of theories of computing (in the 1930s) and information (late in the 1940s) for us to formulate mathematically what it means to compute or communicate. Yet these theories were abstract, based on axiomatic mathematics: what did physical systems have to do with these axioms? Rolf La

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5

Huang, Shao-Lun Ph D. Massachusetts Institute of Technology. "Euclidean network information theory." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84888.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 121-123).<br>Many network information theory problems face the similar difficulty of single letterization. We argue that this is due to the lack of a geometric structure on the space of probability distributions. In this thesis, we develop such a structure by assuming that the distributions of interest are all close to each other. Under this assumption, the Kullback-Leibler (K-L) divergenc

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6

Faghfoor, Maghrebi Mohammad. "Information gain in quantum theory." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2724.

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In this thesis I address the fundamental question that how the information gain is possible in the realm of quantum mechanics where a single measurement alters the state of the system. I study an ensemble of particles in some unknown (but product) state in detail and suggest an optimal way of gaining the maximum information and also quantify the corresponding information exactly. We find a rather novel result which is quite different from other well-known definitions of the information gain in quantum theory.

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7

Vedral, Vlatko. "Quantum information theory of entanglement." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299786.

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8

Girolami, Davide. "Quantum correlations in information theory." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13397/.

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The project concerned the study of quantum correlations (QC) in compound systems, i.e. statistical correlations more general than entanglement which are predicted by quantum mechanics but not described in any classical scenario. I aimed to understand the technical and operational properties of the measures of QC, their interplay with entanglement quantifiers and the experimental accessibility. In the first part of my research path, after having acquired the conceptual and technical rudiments of the project, I provided solutions for some computational issues: I developed analytical and numerica

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9

Hawes, Vanessa Lucey. "Music's experiment with information theory." Thesis, University of East Anglia, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.514351.

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10

Daemi, M. F. "Information theory and pattern recognition." Thesis, University of Nottingham, 1990. http://eprints.nottingham.ac.uk/14003/.

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This thesis presents an account of an investigation into the use of information theory measures in pattern recognition problems. The objectives were firstly to determine the information content of the set of representations of an input image which are found at the output of an array of sensors; secondly to assess the information which may be used to allocate different patterns to appropriate classes in order to provide a means of recognition; and thirdly to assess the recognition capability of pattern recognition systems and their efficiency of utilization of information. Information assessmen

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11

Butterley, Paul. "Topics in quantum information theory." Thesis, University of York, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444697.

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12

Svensson, Bolennarth. "Information theory in quality engineering." Thesis, University of Strathclyde, 1998. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=29903.

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This thesis presents the results of research into a universal theory for quality techniques. The unique contribution that is made is twofold: • A new quality metric is proposed; • An integrating perspective to quality engineering is introduced through the application of information theory. The quality metric is designed as an information distance, measuring the difference between two probability density functions. The two distributions are the actual outcome of a running process and the expected outcome, i.e. the target distribution. The target distribution makes it possible to integrate the q

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13

Angelino, Cesario Vicenzo. "Information theory oriented image restauration." Nice, 2011. http://www.theses.fr/2011NICE4044.

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Cette thèse aborde la formulation par la théorie de l’information des problèmes de traitement d’image. Cette formulation exprime la solution au travers de la minimisation d’une énergie. Ces énergies appartiennent à la classe non paramétrique au sens où elles ne font aucune hypothèse paramétrique sur la distribution des données. Les énergies sont exprimées directement en fonction des données considérées comme des variables aléatoires. Toutefois, l’estimation non paramétrique classique repose sur des noyaux de taille fixe moins fiables lorsqu’il s’agit de données de grande dimension. En particul

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14

Abeyesinghe, Anura Yamesh Preskill John P. "Unification of quantum information theory /." Diss., Pasadena, Calif. : Caltech, 2006. http://resolver.caltech.edu/CaltechETD:etd-05252006-222551.

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15

Pachas, Erik W. "Probabilistic Methods In Information Theory." CSUSB ScholarWorks, 2016. https://scholarworks.lib.csusb.edu/etd/407.

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Given a probability space, we analyze the uncertainty, that is, the amount of information of a finite system, by studying the entropy of the system. We also extend the concept of entropy to a dynamical system by introducing a measure preserving transformation on a probability space. After showing some theorems and applications of entropy theory, we study the concept of ergodicity, which helps us to further analyze the information of the system.

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16

Fukuda, Motohisa. "Additivity conjectures in quantum information theory." Thesis, University of Cambridge, 2007. https://www.repository.cam.ac.uk/handle/1810/252051.

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17

Lukits, Stefan Hermann. "Information theory and partial belief reasoning." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58193.

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The dissertation investigates the nature of partial beliefs and norms governing their use. One widely accepted (though not uncontested) norm for partial belief change is Bayesian conditionalization. Information theory provides a far-reaching generalization of Bayesian conditionalization and gives it a foundation in an intuition that pays attention principally to information contained in probability distributions and information gained with new evidence. This generalization has fallen out of favour with contemporary epistemologists. They prefer an eclectic approach which sometimes conflicts wit

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18

Karvovskaya, Lena, Vadim Kimmelman, Christine Tanja Röhr, Pepi Stavropoulou, Elena Titov, and Putten Saskia van. "Information structure : empirical perspectives on theory." Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2013/6480/.

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The papers collected in this volume were presented at a Graduate/Postgraduate Student Conference with the title Information Structure: Empirical Perspectives on Theory held on December 2 and 3, 2011 at Potsdam-Griebnitzsee. The main goal of the conference was to connect young researchers working on information structure (IS) related topics and to discuss various IS categories such as givenness, focus, topic, and contrast. The aim of the conference was to find at least partial answers to the following questions: What IS categories are necessary? Are they gradient/continuous? How can one deal wi

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19

Buchanan, Steven. "The information audit: theory versus practice." Thesis, University of Strathclyde, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488844.

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The information audit (lA) provides a method to identify, evaluate, and manage an organisation's information resources. With such a central information management role, it might be reasonable to assume that the lA would be an accepted element of information management best practice, particularly given the growth of information based services, and growing recognition of information as a primary resource and tradable commodity.

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20

Maroney, Owen Jack Ernest. "Information and entropy in quantum theory." Thesis, Birkbeck (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268835.

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Recent developments in quantum computing have revived interest in the notion of information as a foundational principle in physics. It has been suggested that information provides a means of interpreting quantum theory and a means of understanding the role of entropy in thermodynamics. The thesis presents a critical examination of these ideas, and contrasts the use of Shannon information with the concept of 'active information' introduced by Bohm and Hiley. We look at certain thought experiments based upon the 'delayed choice' and 'quantum eraser' interference experiments, which present a comp

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21

Sørngård, Bård. "Information Theory for Analyzing Neural Networks." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for datateknikk og informasjonsvitenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26773.

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The goal of this thesis was to investigate how information theory could be used to analyze artificial neural networks. For this purpose, two problems, a classification problem and a controller problem were considered. The classification problem was solved with a feedforward neural network trained with backpropagation, the controller problem was solved with a continuous-time recurrent neural network optimized with evolution.Results from the classification problem shows that mutual information might indicate how much a particular neuron contributes to the classification. Tracking these neurons&a

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22

Schein, Brett E. (Brett Eric). "Distributed coordination in network information theory." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/16786.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.<br>Includes bibliographical references (p. 227-231).<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Constructing a large-scale wireless data network is spectacularly expensive. It is therefore important to understand how to efficiently utilize the physical infrastructure and available battery power, which are expensive system resources. Unfortunately, we currently understand

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23

Meznaric, Sebastian. "Information theoretic resources in quantum theory." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:ac3a801c-6351-4882-b6ed-5b2f635cff45.

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Resource identification and quantification is an essential element of both classical and quantum information theory. Entanglement is one of these resources, arising when quantum communication and nonlocal operations are expensive to perform. In the first part of this thesis we quantify the effective entanglement when operations are additionally restricted to account for both fundamental restrictions on operations, such as those arising from superselection rules, as well as experimental errors arising from the imperfections in the apparatus. For an important class of errors we find a linear rel

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24

Jenkinson, Justin. "Convex Geometric Connections to Information Theory." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1365179413.

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25

Benešová, Anita. "Job Information Networks and Game Theory." Master's thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-81886.

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The use of personal contacts and the role of education as a signal of the Worker's productivity are two important aspects of the job search process. The aim of this thesis is to develop a model that combines both approaches. We distinguish between random and strategic models of job information networks. In the former case the structure of the network is given, while in the latter it depends on the strategic decision of the Workers. We present a strategic model of network formation with two types of Workers who are able to signal their productivity by the level of their education. When applying

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26

Chli, Margarita. "Applying information theory to efficient SLAM." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/5634.

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The problem of autonomous navigation of a mobile device is at the heart of the more general issue of spatial awareness and is now a well-studied problem in the robotics community. Following a plethora of approaches throughout the history of this research, recently, implementations have been converging towards vision-based methods. While the primary reason for this success is the enormous amount of information content encrypted in images, this is also the main obstacle in achieving faster and better solutions. The growing demand for high-performance systems able to run on affordable hardware pu

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27

Han, Lin. "Graph generative models from information theory." Thesis, University of York, 2012. http://etheses.whiterose.ac.uk/3726/.

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Generative models are commonly used in statistical pattern recognition to describe the probability distributions of patterns in a vector space. In recent years, sustained by the wide range of mathematical tools available in vector space, many algorithms for constructing generative models have been developed. Compared with the advanced development of the generative model for vectors, the development of a generative model for graphs has had less progress. In this thesis, we aim to solve the problem of constructing the generative model for graphs using information theory. Given a set of sample gr

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28

Fallis, Don. "Epistemic Value Theory and Information Ethics." Springer, 2004. http://hdl.handle.net/10150/105254.

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Three of the major issues in information ethics—intellectual property, speech regulation, and privacy—concern the morality of restricting people’s access to certain information. Consequently, policies in these areas have a significant impact on the amount and types of knowledge that people acquire. As a result, epistemic considerations are critical to the ethics of information policy decisions (cf. Mill 1978 [1859]). The fact that information ethics is a part of the philosophy of information highlights this important connection with epistemology. In this paper, I illustrate how a value-theoret

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29

Bonev, Boyan. "Feature selection based on information theory." Doctoral thesis, Universidad de Alicante, 2010. http://hdl.handle.net/10045/18362.

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Along with the improvement of data acquisition techniques and the increasing computational capacity of computers, the dimensionality of the data grows higher. Pattern recognition methods have to deal with samples consisting of thousands of features and the reduction of their dimensionality becomes crucial to make them tractable. Feature selection is a technique for removing the irrelevant and noisy features and selecting a subset of features which describe better the samples and produce a better classification performance. It is becoming an essential part of most pattern recognition applicatio

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30

Culpepper, Sarah Elizabeth. "Musical time and information theory entropy." Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/659.

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Many theorists have connected information content in music with the listener's perception of the passage of time. This thesis uses the construct of information theory entropy, developed in the 1940s by Bell Labs engineer Claude Shannon, to describe the passage of time in Webern's music. Entropy scores are computed based on pitches, intervals, CSEGs, and pc-sets; these scores are then used to examine the first of the Five Canons, op. 16, and the fourth of the Five Movements for String Quartet, op. 5.

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Law, Yan Tai. "Pricing under random information flow and the theory of information pricing." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/9292.

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This thesis presents a mathematical formulation of informational inhomogeneity in financial markets, with emphasis on its impact on asset volatility, the notion of information extraction, and the role of information providers. We begin with a brief review of the BHM framework, which models the market filtration by an information process consisting of a signal and a noise term, such that the signal-to-noise ratio is determined by the information flow rate. Motivated by the observations that valuable information is rarely circulated homogeneously across financial markets, and that the informatio

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32

Sadok, Djamel Fawzi Hadj. "Interpersonal interchange of multimedia information." Thesis, University of Kent, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278242.

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33

Esmer, Ozcan. "Information Theory, Entropy And Urban Spatial Structure." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606319/index.pdf.

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Urban planning has witnessed the profound changes in the methodologies of modelling during the last 50 years. Spatial interaction models have passed from social physics, statistical mechanics to non-spatial and spatial information processing stages of progress that can be designated as paradigm shifts. This thesis traces the Maximum Entropy (MaxEnt) approach in urban planning as pioneered by Wilson (1967,1970) and Spatial Entropy concept by Batty (1974) based on the Information Theory and its developments by Shannon (1948), Jaynes (1957), Kullback (1959) and by Tribus (1962,1969). Information-

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Puhakainen, P. (Petri). "A design theory for information security awareness." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514281144.

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Abstract When implementing their information security solutions organizations have typically focused on technical and procedural security measures. However, from the information systems (IS) point of view, this is not enough: effective IS security requires that users are aware of and use the available security measures as described in their organizations' information security policies and instructions. Otherwise, the usefulness of the security measures is lost. The research question of this thesis is to explore how IS users' compliance with IS security policies and instructions can be improve

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Seabrooke, Kevin Christopher. "Multimodal brain volume registration using information theory." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ56364.pdf.

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Savov, Ivan. "Network information theory for classical-quantum channels." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110349.

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Network information theory is the study of communication problems involving multiple senders, multiple receivers and intermediate relay stations. The purpose of this thesis is to extend the main ideas of classical network information theory to the study of classical-quantum channels. We prove coding theorems for the following communication problems: quantum multiple access channels, quantum interference channels, quantum broadcast channels and quantum relay channels. A quantum model for a communication channel describes more accurately the channel's ability to transmit information. By using ph

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Quinn, Kathleen Anne Sara. "Combinatorial structures with applications to information theory." Thesis, Royal Holloway, University of London, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261791.

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Barrett, J. "Entanglement, non-locality and quantum information theory." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596412.

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In this dissertation, motivated both by our incomplete physical understanding, and by quantum information theory, we investigate quantum non-locality. In Chapter 2, we ask the question, which quantum states are non-local? We show that any entangled pure state is non-local, but that things are complicated with mixed states. In particular, following Werner’s local hidden variable model for projective measurements on a class of entangled states, we write down an extended model that works for arbitrary positive operator valued measurements performed by the separated observers. We also show that th

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Richardson, Sandra. "HEALTHCARE INFORMATION SYSTEMS:DESIGN THEORY, PRINCIPLES AND APPLICATION." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3182.

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Healthcare information systems (HISs), as a class of systems, are not currently addressed in the MIS literature. This is in spite of a sharp increase in use over the past few years, and the uniquely qualified role that MIS has in the development of, impact and general understanding of HISs. In this project the design science paradigm frames the development of a set of design principles derived from the synthesis of the design literature, ethics literature, and professional guidelines, from both the medical and computing professions. The resulting principles are offered to address the design of

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Selig, Marco. "Information theory based high energy photon imaging." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-178899.

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Goyal, Philip. "An information-theoretic approach to quantum theory." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614984.

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Kojima, Naoki. "Essays on economic theory in asymmetric information." Toulouse 1, 2001. http://www.theses.fr/2001TOU10093.

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Cette thèse traite trois sujets différents de l'aspect de l'asymétrie de l'information, plus particulièrement de la sélection adverse : étude de la "relationship banking" dans le cadre de concurrence entre banques ; introduction des actions d'une entreprise en bourse (conflits d'intérêt entre la firme émettrice, l'entreprise financière chargée de la mise en vente et les investisseurs) ; mécanisme de la tarification optimale d'un monopole avec des consommateurs contraints en budget et proposition d'une nouvelle approche de ce problème de l'asymétrie d'information bidimensionnelle<br>This thesis

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Smith, Charles Eldon. "An information-processing theory of party identification /." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487848531364663.

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Dunleavy, Andrew J. "Applying information theory to super-cooled liquids." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.683695.

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In this thesis we study super-cooled liquids through simulations of hard interacting particles: hard disks in two dimensions, and hard spheres in three dimensions. These systems provide simple models of glass-forming liquids in general and are good models for colloidal glass-forming systems specifically. Whether static structure exists, and the nature of any collective motion are two key questions about super-cooled liquids. Both involve correlation, and this motivates us to use information theory: we use Shannon entropy and mutual information to provide general, unbiased measurements of disor

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Smith, Julian P. "Neural networks, information theory and knowledge representation." Thesis, University of Edinburgh, 1996. http://hdl.handle.net/1842/20801.

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Borsten, Leron. "Aspects of M-theory and quantum information." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6051.

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As the frontiers of physics steadily progress into the 21st century we should bear in mind that the conceptual edifice of 20th-century physics has at its foundations two mutually incompatible theories; quantum mechanics and Einstein’s general theory of relativity. While general relativity refuses to succumb to quantum rule, black holes are raising quandaries that strike at the very heart of quantum theory. M-theory is a compelling candidate theory of quantum gravity. Living in eleven dimensions it encompasses and connects the five possible 10-dimensional superstring theories. However, Mtheory

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Kang, Wei. "Correlation and cooperation in network information theory." College Park, Md. : University of Maryland, 2008. http://hdl.handle.net/1903/8355.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2008.<br>Thesis research directed by: Dept. of Electrical and Computer Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Takahashi, Maki. "Studies in relativity and quantum information theory." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/9915.

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This thesis explores a broad range of topics in the foundations of relativity and quantum information theory. The first and main topic of this thesis is on relativistic quantum information theory. Here we construct a reformulation of quantum information, which is consistent with relativity theory. We will see that by providing a rigorous formulation starting with the field equations for a massive fermion and a photon we can construct a theory for relativistic quantum information. In particular we provide a measurement formalism, a transport equation which describes the unitary evolution of a s

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Simpson, Mark Aloysius. "Complexity Theory of Leadership and Management Information." ScholarWorks, 2018. https://scholarworks.waldenu.edu/dissertations/6121.

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Implementing effective leadership strategies in management of information systems (MIS) can positively influence overall organizational performance. This study was an exploration of the general problem of failure to lead effectively in the current knowledge-based economy and the resulting deleterious effects on organizational performance and threats to continuing organizational viability. The specific problem was the lack of understanding regarding the interaction of leadership processes with MIS functions and the impact on organizational success. Managers' and employees' lived experiences of

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Zonzo, Giuseppe. "Quantum Information Theory in Condensed Matter Physics." Doctoral thesis, Universita degli studi di Salerno, 2017. http://hdl.handle.net/10556/2625.

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2015 - 2016<br>Inthe“standard”Gizburg-Landauapproach,aphasetransitionisintimately connected to a local order parameter, that spontaneously breaks some symmetries. In addition to the “traditional” symmetry-breaking ordered phases, a complex quantum system exhibits exotic phases, without classical counterpart, that can be described, for example, by introducing non-local order parameters that preserve symmetries. In this scenario, this thesis aims to shed light on open problems, such as the localdistinguishabilitybetweengroundstatesofasymmetry-breakingordered phase and the classiﬁcation of one di

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