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Author: Nan Ma Publisher: ISBN: Category : Languages : en Pages : 320
Book Description
Abstract: Today coding-blocklength, rate, signal-to-noise ratio, frequency, and network-size, are well recognized and studied resources for communication and computation in information theory. A relatively less recognized and understood resource is interaction, that is, the number of rounds of two-way information exchange. This thesis undertakes a comprehensive mathematical analysis of the benefits of interaction for distributed computation in source networks using the information-theoretic framework of distributed block source coding. The ultimate limits of computation efficiency for two-terminal and certain types of collocated networks are characterized in terms of the statistical dependencies between the information sources and the structure of the desired functions. A blueprint for designing a new family of distributed source codes for general networks is developed where interaction protocols can harness the structure of the functions, the network topology, and the statistical dependencies to maximize the computation-efficiency. A novel viewpoint is introduced in which the minimum sum-rate is viewed as a functional of the joint source distribution and distortion levels. Certain convex-geometric properties of this functional are established and used to develop a new type of blocklength-free single-letter characterization of the ultimate limit of interactive computation involving potentially an infinite number of infinitesimal-rate messages. The traditional method for single-letter characterization is shown to be inadequate. The new characterization is used to derive closed-form analytic expressions of the infinite-message minimum sum-rates for specific examples and an efficient iterative algorithm for numerically evaluating any finite-message minimum sum-rate for the general case. It is also used to construct the first examples which demonstrate that for lossy source reproduction, two messages can strictly improve the one-message Wyner-Ziv rate-distortion function settling an open question from a 1985 paper. For computing symmetric functions of binary sources in collocated networks, a new lower bound of the minimum sum-rate is derived and shown to be order-wise tight while the cut-set bound is shown to be order-wise loose. Striking examples are constructed to highlight the benefits of interaction: in a two-terminal network a single backward message can lead to an arbitrarily large gain in the sum-rate and in a star network interaction can change the sum-rate by an order-of-magnitude.
Author: Nan Ma Publisher: ISBN: Category : Languages : en Pages : 320
Book Description
Abstract: Today coding-blocklength, rate, signal-to-noise ratio, frequency, and network-size, are well recognized and studied resources for communication and computation in information theory. A relatively less recognized and understood resource is interaction, that is, the number of rounds of two-way information exchange. This thesis undertakes a comprehensive mathematical analysis of the benefits of interaction for distributed computation in source networks using the information-theoretic framework of distributed block source coding. The ultimate limits of computation efficiency for two-terminal and certain types of collocated networks are characterized in terms of the statistical dependencies between the information sources and the structure of the desired functions. A blueprint for designing a new family of distributed source codes for general networks is developed where interaction protocols can harness the structure of the functions, the network topology, and the statistical dependencies to maximize the computation-efficiency. A novel viewpoint is introduced in which the minimum sum-rate is viewed as a functional of the joint source distribution and distortion levels. Certain convex-geometric properties of this functional are established and used to develop a new type of blocklength-free single-letter characterization of the ultimate limit of interactive computation involving potentially an infinite number of infinitesimal-rate messages. The traditional method for single-letter characterization is shown to be inadequate. The new characterization is used to derive closed-form analytic expressions of the infinite-message minimum sum-rates for specific examples and an efficient iterative algorithm for numerically evaluating any finite-message minimum sum-rate for the general case. It is also used to construct the first examples which demonstrate that for lossy source reproduction, two messages can strictly improve the one-message Wyner-Ziv rate-distortion function settling an open question from a 1985 paper. For computing symmetric functions of binary sources in collocated networks, a new lower bound of the minimum sum-rate is derived and shown to be order-wise tight while the cut-set bound is shown to be order-wise loose. Striking examples are constructed to highlight the benefits of interaction: in a two-terminal network a single backward message can lead to an arbitrarily large gain in the sum-rate and in a star network interaction can change the sum-rate by an order-of-magnitude.
Author: Publisher: ScholarlyEditions ISBN: 1490107266 Category : Computers Languages : en Pages : 981
Book Description
Issues in Information Science Research / 2013 Edition is a ScholarlyEditions™ book that delivers timely, authoritative, and comprehensive information about Web and Grid Services. The editors have built Issues in Information Science Research: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Web and Grid Services in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Information Science Research: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Author: Shuang Wang Publisher: John Wiley & Sons ISBN: 1118705971 Category : Science Languages : en Pages : 384
Book Description
Distributed source coding is one of the key enablers for efficient cooperative communication. The potential applications range from wireless sensor networks, ad-hoc networks, and surveillance networks, to robust low-complexity video coding, stereo/Multiview video coding, HDTV, hyper-spectral and multispectral imaging, and biometrics. The book is divided into three sections: theory, algorithms, and applications. Part one covers the background of information theory with an emphasis on DSC; part two discusses designs of algorithmic solutions for DSC problems, covering the three most important DSC problems: Slepian-Wolf, Wyner-Ziv, and MT source coding; and part three is dedicated to a variety of potential DSC applications. Key features: Clear explanation of distributed source coding theory and algorithms including both lossless and lossy designs. Rich applications of distributed source coding, which covers multimedia communication and data security applications. Self-contained content for beginners from basic information theory to practical code implementation. The book provides fundamental knowledge for engineers and computer scientists to access the topic of distributed source coding. It is also suitable for senior undergraduate and first year graduate students in electrical engineering; computer engineering; signal processing; image/video processing; and information theory and communications.
Author: Abbas El Gamal Publisher: Cambridge University Press ISBN: 1139503146 Category : Technology & Engineering Languages : en Pages : 666
Book Description
This comprehensive treatment of network information theory and its applications provides the first unified coverage of both classical and recent results. With an approach that balances the introduction of new models and new coding techniques, readers are guided through Shannon's point-to-point information theory, single-hop networks, multihop networks, and extensions to distributed computing, secrecy, wireless communication, and networking. Elementary mathematical tools and techniques are used throughout, requiring only basic knowledge of probability, whilst unified proofs of coding theorems are based on a few simple lemmas, making the text accessible to newcomers. Key topics covered include successive cancellation and superposition coding, MIMO wireless communication, network coding, and cooperative relaying. Also covered are feedback and interactive communication, capacity approximations and scaling laws, and asynchronous and random access channels. This book is ideal for use in the classroom, for self-study, and as a reference for researchers and engineers in industry and academia.
Author: Durga Prasad Mohapatra Publisher: Springer Science & Business Media ISBN: 8132216652 Category : Technology & Engineering Languages : en Pages : 1314
Book Description
This book is composed of the Proceedings of the International Conference on Advanced Computing, Networking, and Informatics (ICACNI 2013), held at Central Institute of Technology, Raipur, Chhattisgarh, India during June 14–16, 2013. The book records current research articles in the domain of computing, networking, and informatics. The book presents original research articles, case-studies, as well as review articles in the said field of study with emphasis on their implementation and practical application. Researchers, academicians, practitioners, and industry policy makers around the globe have contributed towards formation of this book with their valuable research submissions.
Author: Malay Kumar Kundu Publisher: Springer ISBN: 3319073508 Category : Technology & Engineering Languages : en Pages : 619
Book Description
Advanced Computing, Networking and Informatics are three distinct and mutually exclusive disciplines of knowledge with no apparent sharing/overlap among them. However, their convergence is observed in many real world applications, including cyber-security, internet banking, healthcare, sensor networks, cognitive radio, pervasive computing amidst many others. This two-volume proceedings explore the combined use of Advanced Computing and Informatics in the next generation wireless networks and security, signal and image processing, ontology and human-computer interfaces (HCI). The two volumes together include 148 scholarly papers, which have been accepted for presentation from over 640 submissions in the second International Conference on Advanced Computing, Networking and Informatics, 2014, held in Kolkata, India during June 24-26, 2014. The first volume includes innovative computing techniques and relevant research results in informatics with selective applications in pattern recognition, signal/image processing and HCI. The second volume on the other hand demonstrates the possible scope of the computing techniques and informatics in wireless communications, networking and security.
Author: Kevin Jeffay Publisher: Morgan Kaufmann ISBN: 9781558606517 Category : Computers Languages : en Pages : 168
Book Description
Compiled for professionals working in designing, building and implementing multimedia-related hardware and applications, this volume examines media and content processing, systems-based solutions and networking suport for multimedia data types.
Author: Cristina Savin Publisher: Frontiers Media SA ISBN: 2889197883 Category : Computational neuroscience Languages : en Pages : 195
Book Description
From the propagation of neural activity through synapses, to the integration of signals in the dendritic arbor, and the processes determining action potential generation, virtually all aspects of neural processing are plastic. This plasticity underlies the remarkable versatility and robustness of cortical circuits: it enables the brain to learn regularities in its sensory inputs, to remember the past, and to recover function after injury. While much of the research into learning and memory has focused on forms of Hebbian plasticity at excitatory synapses (LTD/LTP, STDP), several other plasticity mechanisms have been characterized experimentally, including the plasticity of inhibitory circuits (Kullmann, 2012), synaptic scaling (Turrigiano, 2011) and intrinsic plasticity (Zhang and Linden, 2003). However, our current understanding of the computational roles of these plasticity mechanisms remains rudimentary at best. While traditionally they are assumed to serve a homeostatic purpose, counterbalancing the destabilizing effects of Hebbian learning, recent work suggests that they can have a profound impact on circuit function (Savin 2010, Vogels 2011, Keck 2012). Hence, theoretical investigation into the functional implications of these mechanisms may shed new light on the computational principles at work in neural circuits. This Research Topic of Frontiers in Computational Neuroscience aims to bring together recent advances in theoretical modeling of different plasticity mechanisms and of their contributions to circuit function. Topics of interest include the computational roles of plasticity of inhibitory circuitry, metaplasticity, synaptic scaling, intrinsic plasticity, plasticity within the dendritic arbor and in particular studies on the interplay between homeostatic and Hebbian plasticity, and their joint contribution to network function.
Author: Anand R. Asthagiri Publisher: Academic Press ISBN: 0123884039 Category : Computers Languages : en Pages : 427
Book Description
Computational methods are playing an ever increasing role in cell biology. This volume of Methods in Cell Biology focuses on Computational Methods in Cell Biology and consists of two parts: (1) data extraction and analysis to distill models and mechanisms, and (2) developing and simulating models to make predictions and testable hypotheses. Focuses on computational methods in cell biology Split into 2 parts--data extraction and analysis to distill models and mechanisms, and developing and simulating models to make predictions and testable hypotheses Emphasizes the intimate and necessary connection with interpreting experimental data and proposing the next hypothesis and experiment
Author: Nan Ma
Author: Nan Ma
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Author: 
Author: Shuang Wang
Author: Abbas El Gamal
Author: Durga Prasad Mohapatra
Author: Malay Kumar Kundu
Author: Kevin Jeffay
Author: Cristina Savin
Author: Anand R. Asthagiri