Kommunikationsteknik / telekommunikation

This book provides an overview of some advanced techniques and technologies developed for polarimetric radars. It covers how the systems are designed to meet challenging performance requirements and also covers some of the most challenging application fields.

The book provides an overview of crude oil refining processes and presents a deep analysis of the current context and challenges in the downstream industry. It covers traditional refining processes, the impact of current trends, and technological routes available to help those in the industry survive in a highly competitive environment.

Focuses specifically on real-time applications in electronics, communications, computing, and information technology. Topics address applications for automotive use, detecting DoS attacks, social media and consumer applications, and hostel management, firefighting, and heart rate variability for predicting cardiac health.

The book explores information security concepts and applications from an organizational information perspective and explains the process of audit planning and preparation. It further demonstrates audit techniques and collecting evidence to write important documentation by following the ISO 27001 standards.

This fourth edition of the text reflects the continuing increase in awareness and use of computational electromagnetics and incorporates advances and refinements made in recent years. Most notable among these are the improvements made to the standard algorithm for the finite-difference time-domain (FDTD) method and treatment of absorbing boundary conditions in FDTD, finite element, and transmission-line-matrix methods. It teaches the readers how to pose, numerically analyze, and solve EM problems, to give them the ability to expand their problem-solving skills using a variety of methods, and to prepare them for research in electromagnetism.Includes new homework problems in each chapter.Each chapter is updated with the current trends in CEM.Adds a new appendix on CEM codes, which covers commercial and free codes.Provides updated MATLAB code.

Reducing power outage time to each customer is essential to the overall distribution reliability. This book provides the fundamentals of emergency operation using a graph-theoretic approach and exploration of the subsystem(s) that address the operational aspects of electrical fault occurrence to determine possible feeder reconfiguration. The localization of a faulted segment within a feeder involves remote-controlled normally open (NO) and normally closed (NC) switches through supervisory control and data acquisition (SCADA) between radially energized, interconnected feeders. Topics cover: (1) Data extraction from geographic information systems (GIS), (2) Graph modeling of distribution feeders, (3) Programming for backward/forward sweeping unbalanced power flow, (4) Short circuit analysis and fault localization, (5) Fault isolation, temporary and full service restoration, (6) Outage management and crew coordination, (7) Trouble call tickets and escalation to search for fault, and (8) Emerging subject of distribution management systems (DMS). FEATURESNovel and practical textbook that will help to understand distribution operation in graph theoryShow how to convert GIS coordinate datasets to graph and how to troubleshoot the geometry errorsExplain how to troubleshoot power flow divergence due to the bad metering datasets and allocation factor (AF) for each load within primary and secondary networksSimilar platform as DMS environment, but the graduate students have their hands-on experience to implement the applications in the MATLAB environmentDetailed modeling in graph theory of distribution feeders and possible reconfiguration to locate power outage

This book shows how artificial intelligence, including neural networks and deep learning, can be applied to the processing of satellite data for Earth observation. The authors explain how to develop a set of libraries for the implementation of artificial intelligence that encompass different aspects of research.

In 1964, of the more than 85 million telephones in the United States and Canada, less than one percent were used regularly by deaf people. If they didn't ask their hearing neighbors for help, they depended upon their hearing children, some as young as three years old, to act as intermediaries for business calls or medical consultations. In that same year, three enterprising deaf men, Robert H. Weitbrecht, James C. Marsters, and Andrew Saks, started the process that led to deaf people around the world having an affordable phone system that they could use. Weitbrecht, a successful physicist with the Stanford Research Institute, had been experimenting with a teletypewriter (TTY) used with shortwave radios. When Marsters, a prominent deaf orthodontist, met Weitbrecht and saw his TTY, he immediately suggested the possibility of resolving deaf people's decades-long struggle to have access to telecommunications without relying totally upon hearing people as go-betweens. Andrew Saks brought his business acumen to the group, which soon set to work overcoming the daunting problems they faced. Harry G. Lang's A Phone of Our Own: The Deaf Insurrection Against Ma Bell tells how these three men collaborated to solve the technical difficulties of developing a coupling device for TTYs that would translate sounds into discernible letters. More remarkably, and with the help of an expanding corps of Deaf advocates, they successfully assaulted the American Telephone and Telegraph Company (AT&T), which in its efforts to protect its monopoly, smashed old TTYs to keep them from being used for potentially competitive purposes. The Federal Communications Commission (FCC) also resisted efforts to build a telephone system for deaf people that was available, affordable, portable, and fully accessible. Lang recounts in vivid terms how many other Deaf individuals and groups from all walks of life joined Weitbrecht, Marsters, and Saks against these forces. A Phone of Our Own is an entertaining and engrossing story of how they fought and won, and changed the world for the better for deaf people everywhere.

Im Zentrum des Bandes steht die Herleitung der Maxwellschen Gleichungen und deren Losung. Die Stationen auf diesem Weg sind die Gesetze des Stromungsfeldes, der Elektrostatik und Magnetostatik. Der Band richtet sich an Studenten der Elektrotechnik und Informationstechnologie und an Studenten des Faches Physik mit dem Ziel, ihnen den Einstieg in die Vorlesung Elektromagnetische Feldtheorie zu erleichtern. Der Band baut auf den Kenntnissen auf, die in den Leistungskursen Physik und Mathematik der Gymnasien und Gesamtschulen vermittelt werden und ist zum Gebrauch neben den Vorlesungen gedacht. Besonderer Wert wird auf ausfuhrliche Erklarungen in Textform in Verbindung mit vielen Abbildungen gelegt. Alle Formeln werden Schritt fur Schritt hergeleitet.