This chapter has discussed how a commonbroadcast medium can be shared among many contending users. Multiple access protocols differ primarily by the amount of coordination needed to control potentially conflicting packet transmissions. Ato neextreme is random access where no coordinationis provideda ndp acket collisions arep ossible. Atthe other endo fthe spectrum, the class of fixed assignment access protocols eliminates collisions entirely butpay the price ofadditional overhead required forscheduling user access. Hybrid access protocolsb etweenthese two extremes exist While these protocols attempt to combine the advantages ofrandom andfixed access, they also suffer the c ombined drawbacks and overhead ofboth classes of access schemes. Amongt he many factors that determine the performance ofa n access protocol include the propagation delay/packet transmission timeratio, the message arrival process, the types of feedback information available, the user population, and the ability of the user to sense the activities in the network. BIBLIOGRAPHY [ABRA93] Abramson, N. , Multiple Access Communications , IEEE Press, 1993. [BERT92] Bertsekas, D. and Gallager, R. , Data Networks , Prentice Hall, 1992. [CHOU83]Chou,W, ComputerCommunications Volume1:Principles , Prentice Hall, 1983. [CIDO87] Cidon, I. andSidi, M. , "Erasures and Noise in Splitting Multiple Access Algorithms", IEEE Transactions on Information Theory, Vol. 33, No. 1, January 1987, pp. 132 - 140. [CIDO88] Cidon, I, Kodesh, H. and Sidi, M. , "Erasure, Capture and Random Power Level Selectionin Multiple Access Systems", IEEE Transactions on Communications , Vol. 3 6,N o. 3,March 1988, pp. 263 - 271.

The volumes includes selected and reviewed papers from the 2nd ETA Conference on Energy and Thermal Management, Air Conditioning and Waste Heat Recovery in Berlin, November 22-23, 2018. Experts from university, public authorities and industry discuss the latest technological developments and applications for energy efficiency. Main focus is on automotive industry, rail and aerospace.

This book covers the diagnosis and assessment of the various faults which can occur in a three phase induction motor, namely rotor broken-bar faults, rotor-mass unbalance faults, stator winding faults, single phasing faults and crawling. Following a brief introduction, the second chapter describes the construction and operation of an induction motor, then reviews the range of known motor faults, some existing techniques for fault analysis, and some useful signal processing techniques. It includes an extensive literature survey to establish the research trends in induction motor fault analysis. Chapters three to seven describe the assessment of each of the five primary fault types. In the third chapter the rotor broken-bar fault is discussed and then two methods of diagnosis are described; (i) diagnosis of the fault through Radar analysis of stator current Concordia and (ii) diagnosis through envelope analysis of motor startup current using Hilbert and Wavelet Transforms. In chapter four, rotor-mass unbalance faults are assessed, and diagnosis of both transient and steady state stator current has been analyzed using different techniques. If both rotor broken-bar and rotor-mass unbalance faults occur simultaneously then for identification an algorithm is provided in this chapter. Chapter five considers stator winding faults and five different analysis techniques, chapter six covers diagnosis of single phasing faults, and chapter seven describes crawling and its diagnosis. Finally, chapter eight focuses on fault assessment, and presents a summary of the book together with a discussion of prospects for future research on fault diagnosis.

This is an edited collection by world-class experts, from diverse fields, focusing on integrating smart in-vehicle systems with human factors to enhance safety in automobiles. The book presents developments on road safety, in-vehicle technologies and state-of-the art systems. Includes coverage of DSP technologies in adaptive automobiles, algorithms and evaluation of in-car communication systems, driver-status monitoring and stress detection, in-vehicle dialogue systems and human-machine interfaces, challenges in video and audio processing for in-vehicle products, multi-sensor fusion for driver identification and vehicle to infrastructure wireless technologies.

While modern cities continue to grow and become more efficient in many sectors as their population increases, public transportation has not yet caught up. As a significant industry in contemporary society, further progress in transportation systems is more vital than ever. Engineering Tools and Solutions for Sustainable Transportation Planning is an informative reference source that outlines why current transportation systems have become inefficient in modern societies, and offers solutions for the improvement of transportation infrastructures. Highlighting key topics such as parking organization, car ownership, energy consumption, and highway performance, this is a detailed resource for all practitioners, academics, graduate students, and researchers that are interested in studying the latest trends and developments in the transportation sector.

A nautical chart of the West Indian Island of Dominica.

This interdisciplinary thesis involves the design and analysis of coordination algorithms on networks, identification of dynamic networks and estimation on networks with random geometries with implications for networks that support the operation of dynamic systems, e.g., formations of robotic vehicles, distributed estimation via sensor networks. The results have ramifications for fault detection and isolation of large-scale networked systems and optimization models and algorithms for next generation aircraft power systems. The author finds novel applications of the methodology in energy systems, such as residential and industrial smart energy management systems.

Hydrogen Fuel Cells for Road Vehicles addresses the main issues related to the application of hydrogen fuel cell technology in the road transportation sector. A preliminary treatment is given on fuel resources and atmospheric pollution concerns which are closely related to the current technology (internal combustion engine) used for moving people and goods. The authors deal, in particular, with the problems that can hinder a widespread hydrogen market (production, storage and distribution), as well as giving an analysis of fuel cell technologies available for utilization of this energy carrier in the automotive field. Hydrogen Fuel Cells for Road Vehicles also examines the concerns faced during the design and realization of a PEM fuel cell system with optimal size and efficiency, evidencing the impact of the individual auxiliary components on energy losses and dynamic stack performance. The book ends with the analysis of two practical case studies on fuel cell propulsion systems. Hydrogen Fuel Cells for Road Vehicles is a useful text for researchers, professionals and advanced students in the fields of automotive and environmental engineering.

Intelligent Transport Systems (ITS) have been a domain of substantial development for more than thirty years, enhancing safety, (energy and fuel) efficiency, comfort, and economic growth. Cooperative Intelligent Transport Systems (C-ITS), also referred to as Connected Vehicles, are a prelude to, and pave the way towards road transport automation. Vehicle connectivity and information exchange will be an important asset for future highly-automated driving. The book provides a comprehensive insight in the state of the art of C-ITS and automated driving, especially addresses the important role of ICT (Information and Communication Technologies) infrastructure, and presents the main achievements (both theory and practice), as well as the challenges in the domain in Europe, the US and Asia/Pacific.

An unmanned aerial vehicle (UAV) is an aircraft that is equipped with necessary data processing units, sensors, automatic control and communications systems, and is capable of performing autonomously flight missions without a human pilot. Unmanned Rotorcraft Systems provides a complete treatment of the design of fully autonomous miniature rotorcraft UAVs. It is an integration of advanced technologies developed in communications, computing and control areas. In particular, it focuses on:

the systematic hardware construction;

software systems integration;

aerodynamic modeling; and

automatic flight control system design.

Emphasis is extended to the cooperative control and flight formation of multiple UAVs, and vision-based ground target tracking and landing on moving platforms. Other issues such as the development of GPSless indoor micro aerial vehicles and vision-based navigation are also highlighted.

The proposed monograph aims to explore the research and development of fully functional miniature UAV (unmanned-aerial-vehicle) rotorcraft. This consists of a small-scale basic rotorcraft with all necessary accessories onboard, and a ground station. The unmanned system is an integration of advanced technologies developed in communications, computing and control areas. It is an excellent testing ground for trialing and implementing modern control techniques. It is however a highly challenging process. The aerodynamics of a small-scale rotorcraft such as a hobby helicopter are similar to its full-scale counterpart but has some unique characteristics, such as the utilization of stabilizer bar and higher main/tail rotors rotation speed. Besides these, the strict limitation on payload also increases the difficulty on upgrading a small-scale rotorcraft to a UAV with full capacities. Based on its various characteristics and limitations, a light-weight but effective onboard computer system with corresponding onboard/ground software should be carefully designed to realize the system identification and automatic flight requirements. These issues will be addressed in detail in this monograph. Research on the following will be detailed:

utilizing the vision-based system for accomplishing ground target tracking;

attacking and landing;

cooperative control and flight formation of muitiple unmanned rotorcraft;

future research directions on the related areas.

The book will be a good reference for researchers and students working on the related subjects. Unmanned Rotorcraft Systems will be of great value to practicing engineers in rotorcraft industries and to researchers in areas related to the development of unmanned systems in general. It may be used as a reference for advanced undergraduate and graduate students in aeronautics and astrinautics, electrical and mechanical engineering."

Fossil fuel prices continue to rise and, at the same time, environmental policies are demanding a reduction in greenhouse gases and toxic emissions. A coherent energy strategy is needed: one that addresses both energy supply and demand and takes into account the whole energy lifecycle, from fuel production to the end-users of energy systems. This book examines hydrogen energy technologies and infrastructure development.

Though usually regarded as a footnote in automotive history, Maxwell Motor was one of the leading automobile producers in the United States during the first quarter of the twentieth century, and its cars offered several innovations to buyers of the time. For instance, Maxwell's was the first popular car with its engine in front instead of under the body, the first to be designed with three-point suspension and shaft drive, and one of the earliest cars to feature thermo-syphon cooling. In Maxwell Motor and the Making of the Chrysler Corporation, Anthony J. Yanik examines the machines, the process, and the men behind Maxwell, describing both the vehicle engineering and the backroom wheeling and dealing that characterized the emergence and disappearance of the early auto companies. In this detailed history, Yanik charts the company's evolution through the early Maxwell-Briscoe years, 1903-1912; the Maxwell Motor Company years, 1913-1920; and finally the Maxwell Motor Corporation years, 1921-1925. He considers the influential leaders, including Jonathan Maxwell, Benjamin Briscoe, Walter Flanders, and Walter P. Chrysler, who executed the business decisions and corporate mergers that shaped each tumultuous era, concluding with Chrysler's eventual deal to transfer all Maxwell assets to form a new Chrysler Corporation in 1925. Yanik also discusses the aftermath of Maxwell's dissolution and the fate of its famous corporate leaders. For this study, Yanik draws on a wealth of primary sources including old automotive trade journals, the writings of Ben Briscoe and William Durant, and company records in the Chrysler archives. Maxwell Motor and the Making of the Chrysler Corporation fills a gap in existing automotive scholarship and proves that the Maxwell story is an excellent resource for documenting the development of the automobile industry in the early twentieth century. Auto buffs and local historians will appreciate Yanik's thorough and engaging look at this slice of automotive history.

A Dutch Italianate, Adriaen Van de Velde represents a point of artistic crosscommunication across borders, fusing agricultural landscapes in Holland with mythological Arcadian scenes in Italian settings. He died at the early age of 35, and yet he produced a great number of masterpieces that earned him tremendous posthumous fame in the 18th and 19th centuries, when he was one of the most sought-after names among collectors in Germany, France and England. Compared to Mozart's chamber music by the renowned art historian Wolfgang Stechow (1896-1974), Van de Velde's works are delicate and carefully composed and demonstrate his mastery of lighting effects as well as the human figure. His father Willem van de Velde the Elder and brother of the Younger were both marine painters, who in the winter of 1672-73 moved from Leiden to England to work in the service of King Charles II. Adriaen, by contrast, almost certainly never travelled outside his native country and chose to paint landscapes rather than seascapes. His meadows, Italianate views, beaches, dunes, forests, winter scenes and portraits in landscape settings and are among the very best that the Dutch Golden Age has produced. Moreover, the artist's drawings are widely considered to be a high point in 17th-century Dutch draughtsmanship. Yet despite his fame in previous centuries and the exquisite quality of his work, there has never been an exhibition devoted to the artist. As well as bringing together 60 of his finest works, the publication will reunite the paintings with their preparatory studies in seductive red chalk or pen and ink for the first time, making it possible to follow very precisely the various phases in the artist's creative process - perhaps more so than is possible for any other Dutch artist of the period. The publication will therefore offer not only a survey of the artist's oeuvre but also a rare glimpse of a seventeenth-century Dutch landscape painter at work, from conception to completion.

The central premise of Design for Transport is that the designer's role is to approach design for transport from the point of view of the user. People have a collection of wants and needs and a significant proportion of them are to do with their requirements for mobility. The authors show how creative designers can take a user-focused approach for a wide range of types of transport products and systems. In so doing their starting point is one of creative dissatisfaction with what is currently available, and their specialist capability is in imagining and developing new solutions which respond to that opportunity. How this is tackled varies depending on the context, and the variety of solutions produced reflects the different aspirations and needs of the people they are designing for. The chapters cover user needs and transport, design and the transport system, transport design case studies, and the case for the automobile. A conclusion briefly signals what the future for transport design might be. Lavishly illustrated throughout in four-colour, Design for Transport, is an imaginative and rigorous guide to how designers can take a user-centred and socially responsible approach to tackling a range of types of transport, from systems to products and from bicycles to automobiles, demonstrating a rich array of solutions through case studies.

'Commerce In Space' discusses opportunities in the development of policies to use space technology for the improvement of life on earth.

In April 1990 a conference was held at the Cracow Institute of Technology, Cracow, Poland. The title of that conference was "Residual Stresses in Rails - Effects on Rail Integrity and Railroad Economics" and its themes were the measurement and prediction of residual stresses in rails, but, as the sub-title suggests, the intention was also to provide a link between research and its application to the practical railway world. At the Cracow conference there were 40 participants with 5 railways and 5 rail makers being represented and 25 papers were given. The Cracow conference was a success, and by March 1991 its off-spring, "The International Conference on Rail Quality and Maintenance for Modern Railway Operations", was conceived and birth was ultimately given in June 1992 at the Technical University, Delft. It turned out to be some baby, with 112 delegates from 24 countries taking part! As with its predecessor, the conference was to provide a forum for the exchange of ideas between research investigators, rail makers and railway engineers. A cursory examination of the list of participants suggests that about 57% were from the railway industry, 34% from universities and other research institutions and 9% from the steel industry. Bearing in mind that some of the railway industry participants were from their respective research and development organisations the balance of interests was about right.

This comprehensive monograph addresses crucial issues in the protection of railway systems, with the objective of enhancing the understanding of railway infrastructure security. Based on analyses by academics, technology providers and railway operators, it explains how to assess terrorist and criminal threats, design countermeasures, and implement effective security strategies. In so doing, it draws upon a range of experiences from different countries in Europe and beyond. The book is the first to be devoted entirely to this subject. It will serve as a timely reminder of the attractiveness of the railway infrastructure system as a target for criminals and terrorists and, more importantly, as a valuable resource for stakeholders and professionals in the railway security field aiming to develop effective security based on a mix of methodological, technological and organizational tools. Besides researchers and decision makers in the field, the book will appeal to students interested in critical infrastructure protection.

Airbreathing Propulsion covers the physics of combustion, fluid and thermo-dynamics, and structural mechanics of airbreathing engines, including piston, turboprop, turbojet, turbofan, and ramjet engines. End-of-chapter exercises allow the reader to practice the fundamental concepts behind airbreathing propulsion, and the included PAGIC computer code will help the reader to examine the relationships between the performance parameters of different engines. Large amounts of data have on many different piston, turbojet, and turboprop engines have been compiled for this book and are included as an appendix. This textbook is ideal for senior undergraduate and graduate students studying aeronautical engineering, aerospace engineering, and mechanical engineering.

This book gathers contributions to the 20th biannual symposium of the German Aerospace Aerodynamics Association (STAB) and the German Society for Aeronautics and Astronautics (DGLR). The individual chapters reflect ongoing research conducted by the STAB members in the field of numerical and experimental fluid mechanics and aerodynamics, mainly for (but not limited to) aerospace applications, and cover both nationally and EC-funded projects. Special emphasis is given to collaborative research projects conducted by German scientists and engineers from universities, research-establishments and industries. By addressing a number of cutting-edge applications, together with the relevant physical and mathematics fundamentals, the book provides readers with a comprehensive overview of the current research work in the field. Though the book's primary emphasis is on the aerospace context, it also addresses further important applications, e.g. in ground transportation and energy.

JAXA 's Kaguya mission was successfully launched to the Moon on September 14, 2007 reaching its nominal 100 km circular orbit on October 19 after releasing two subsatellites Okina and Ouna in elliptical orbits with perilunes of 100 km and apolunes of 2400 and 800 km respectively. Observations were obtained for 10 months during the nominal mission beginning in mid-December 2007 followed by 8 month extended mission where data were obtained in lower orbits.

The articles in this book were written by experts in each of the scientific areas of the Kaguya mission, and describe both the mission and the individual scientific investigations, including their objectives, the specifications of the instruments, their calibrations and initial results. This book is essential reading to all potential users of the Kaguya data and those interested in the scientific results of the mission, the properties of the lunar surface and crust and planetary exploration in general.

Through his lifetime's experience working directly on ship and boat conservation projects, developing treatment schemes and advising on many more, Per Hoffmann is uniquely qualified to write this book. He has invited colleagues eminent in specific fields to provide chapters on particular areas of wood conservation. This book is essential reading for any archaeologist, conservator or museum curator tempted to take on the responsibility of preserving marine material.

The third edition of Human Factors in Aviation and Aerospace is a fully updated and expanded version of the highly successful second edition. Written for the widespread aviation community including students, engineers, scientists, pilots, managers, government personnel, etc., this edition continues to offer a comprehensive overview, including pilot performance, human factors in aircraft design, and vehicles and systems. With new editors, this edition adds chapters on aviator attention and perception, accident investigations, automated systems in civil transport airplanes, and aerospace. Multicontributed by leading professionals in the field, this book is the ultimate resource for anyone in the aviation and aerospace industries.