Advances in Communications: Volume I of a selection of papers from INFO II, the Second International Conference on Information Sciences and Systems, University of Patras, Greece, July 9–14, 1979

The technical program of the Conference consisted of technical sessions that covered all-important aspects of control, informa­ tion processing/communications, and computers. In particular, there were numerous technical sessions covering all-important aspects of control, such as control theory, control applications, estima­ tion, identification, adaptive systems, linear systems, stability, cybernetics, computational methods, and simulation. The program also included many sessions on information processing/communicati­ ons, such as information theory, coding, signal analysis, signal processing, communication theory, satellite communications, pat­ tern recognition and image processing. Moreover, there were sever­ al sessions on computers, in particular on computer systems, com­ puter communication networks, and automata. Finally, the technical program included numerous sessions on important applications of systems technology, such as power, energy modeling and planning, earth resources, transportation, economics and management, and physiological systems. In view of the broad scope of the Conference technical program and the extensive coverage of many important aspects of systems theory and applications by internationally known researchers, we hope that this collection of papers will be a useful supplement to the published literature and textbooks used for research and teaching. For the success of the Conference we are indebted to a great many people and institutions, primarily to the authors of the papers, without whom the conference would not have existed, and this book would not have materialized. We are particularly indebted to the great majority of them who paid some or all of their own expenses.

Section I: Information Theory, Coding and Digital Signal Processing.- Generalized Information and Natural (Fuzzy) Language.- Distortion-Rate Theory and Filtering.- Asymptotically Mean Stationary Sources and Channels.- An Information Theory Approach to the Approximation of Functions.- Uncertainly and Entropy-Quantum Information Systems.- The Reduction of the Wave-Function and the Reduction of Entropy.- On Some Functional Equations from Additive and Nonadditive Measures - II.- Information and Complex Systems.- The Evolution of Entropy and of Other Statistical Parameters of Written Greek.- Statistical and Non Statistical Measures of Information.- Storage Versus Performance Exchange in Probabilistic Question-Answering Systems.- Spectral Properties of Bipolar Line Codes with Zero Extraction.- Analysis and Design of an Error Correction Code for a Linear Delta Modulation System.- The Entropy of Written Italian.- Cutoff Rates When Decoding with Approximate Channel Statistics.- Characterization and Performance Evaluation of A (56,28) Code.- Weight Distribution of Some Cyclic Codes of MacWilliams 117.- On Weakly Prefix Subsemigroups of a Free Semigroup.- A Cellular Approach for the Implementation of Digital Signal Processing Algorithms.- A Method for Obtaining Second-Order Digital Filter Structures with Prescribed Pole-Zero Quantization Errors.- Normalized Gradient Algorithms for Adaptive Recursive Digital Filters.- A Class of Second-Order Digital Filters Characterized by Very Small Pole Displacements Due to Parameter Quantization.- Improvement of the Reconstruction and Control of the Compressor Output.- Two-Dimensional Digital Filtering. Basic Considerations and Subroutines for Implementation.- Frequency Response of Multi-Dimensional Linear Phase FIR Digital Filters.- Multi-Dimensional Digital Windows.- Section II: Communications: Theory and Applications.- Cyclo-Ergodicity, Part I: Application to Spectral Extraction.- Asymptotic Inference in Continuous Time Markov Processes.- Transmultiplexing: Factors Influencing the Design of TDM to FDM Conversion.- Realisable Data Transmission Filters with Optimal Properties.- Synchronization Strategies in Digital Data Communication.- On Some Polling Strategies.- A Digital Transmitter and Receiver for Automatic Monitoring of Changes in the State of a Group of Switches.- Switched Polarity DPLL’s for PSK Demodulation.- Combination of the Duobinary Technique with FM for Achieving High Bit Transmission Rates.- Signal Parameter Optimization for the Impulsive Noise Channel.- Hybrid Correlator Based on Exponental Delta Sigma Modulation.- The Design of a Broadband Delta Modulator with Optimum Performance.- A New Protocol for a Distributed Loop Communication Network.- Fiber Optics vs. Conventional Transmission Lines in Distance Communication Systems.- Distributed Processing Network Survivability.- Information Theoretic Approximations for M/G/1 Queuing Systems.- Queuing Analysis of Random Access Protocols.- Sharing a Processor for Monitoring Changes in Quality of Several Communication Links.- Adaptive Bifurcated Routing Algorithm with Threshold.- Congestion Avoidance in Hierarchical Packet Switched Networks.- Congestion Control in Packet Networks.- Congestion Control Techniques for Packet Networks.- Routing and Flow Control in Virtual Circuit Networks.- Towards a Unified Definition of Traffic Control in Communications Networks.- An Information Theoretic Approximation for Modelling Computer Network Nodal Queuing Delay: A Congestion Measure.- In-orbit Measurements of the RF Subsystem of Communications Satellites.- Multiple Access and Location Performance of the TIROS-N Data Collection System.- Synchronization and Synchronous Oscillators.- Section III: Pattern Recognition.- Relevance of a Posteriori Probability Errors in Bayesian Classification.- A Spatial Filtering Technique for MSS Unsupervised Classification Problems.- Factor Analysis and Clustering.- A Methodology for Graphical Identification.- Transmission Line Protection Using Pattern Classification Techniques.- Field Boundary Location by Pattern Recognition Methods.- A Case of Speaker Identification.- Prediction and Verification of Hypotheses in a Speech Recognition System.- Synthesis of Greek Speech with Elementary Speech Segments.- Author Index.