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Interworking of Wireless LANs and Cellular Networks - Wei Song - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Interworking of Wireless LANs and Cellular Networks - Wei Song - Bog - Springer-Verlag New York Inc. - Plusbog.dk

The next-generation of wireless communications are envisioned to be supported by heterogeneous networks by using various wireless access technologies. The popular cellular networks and wireless local area networks (WLANs) present perfectly complementary characteristics in terms of service capacity, mobility support, and quality-of-service (QoS) provisioning. The cellular/WLAN interworking is an effective way to promote the evolution of wireless networks. Interworking of Wireless LANs and Cellular Networks focuses on three aspects, namely access selection, call admission control and load sharing to investigate heterogeneous interworking for cellular/WLAN integrated networks. It not only reveals important observations but also offers useful tools for performance evaluation. The unique traffic and network characteristics are exploited to enhance interworking effectiveness. Theoretical analysis and simulation validation demonstrate benefits of cellular/WLAN interworking in real networks. Last but not the least, this brief highlights promising future research directions to guide interested readers.

DKK 434.00
1

Advanced Wired and Wireless Networks - - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Advanced Wired and Wireless Networks - - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Advanced Wired and Wireless Networks brings the reader a sample of recent research efforts representative of advances in the areas of recognized importance for the future Internet, such as ad hoc networking, mobility support and performance improvements in advanced networks and protocols. Advanced Wired and Wireless Networks is structured to meet the needs of a professional audience in industry, as well as graduate-level students in computer science and engineering.

DKK 816.00
1

Intelligent Transport Systems - Syed Faraz Hasan - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Intelligent Transport Systems - Syed Faraz Hasan - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Focusing on the nuts and bolts of wireless network access for computers on board vehicles, this volume shows how in-car computerization now does much more than merely act as a glorified map-reader. Wireless communication is transforming road travel in ways previously undreamt of, allowing vehicles to "talk" to a wider network and monitor road conditions, potential delays and traffic congestion, all automatically. Toll payments can be made without opening the driver''s window on a cold day, while vehicles might themselves take active steps to avoid collisions. It is the connection between on-board computers and wireless access points, ubiquitous in most cities now, that is a key area of research. Moving vehicles transfer their communications to new points as they progress, and this causes delays, known as "handover latency". In this book, new stochastic models are developed to map the disruption when connecting to 802.11 WLAN points. It details the application of stochastic tools to analyzing communication networks, as well as previous literature on handover latency and relevant mathematical modeling. Finally, it presents a scheme for monitoring traffic congestion using WLAN connectivity. This volume will be a useful addition to the libraries both of wireless communication students and those studying probability theory.

DKK 556.00
1

Advances in Non-Linear Modeling for Speech Processing - Raghunath S. Holambe - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Advances in Non-Linear Modeling for Speech Processing - Raghunath S. Holambe - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Advances in Non-Linear Modeling for Speech Processing includes advanced topics in non-linear estimation and modeling techniques along with their applications to speaker recognition. Non-linear aeroacoustic modeling approach is used to estimate the important fine-structure speech events, which are not revealed by the short time Fourier transform (STFT). This aeroacostic modeling approach provides the impetus for the high resolution Teager energy operator (TEO). This operator is characterized by a time resolution that can track rapid signal energy changes within a glottal cycle. The cepstral features like linear prediction cepstral coefficients (LPCC) and mel frequency cepstral coefficients (MFCC) are computed from the magnitude spectrum of the speech frame and the phase spectra is neglected. To overcome the problem of neglecting the phase spectra, the speech production system can be represented as an amplitude modulation-frequency modulation (AM-FM) model. To demodulate the speech signal, to estimation the amplitude envelope and instantaneous frequency components, the energy separation algorithm (ESA) and the Hilbert transform demodulation (HTD) algorithm are discussed. Different features derived using above non-linear modeling techniques are used to develop a speaker identification system. Finally, it is shown that, the fusion of speech production and speech perception mechanisms can lead to a robust feature set.

DKK 434.00
1

Switching in Semiconductor Diodes - Y. R. Nosov - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Switching in Semiconductor Diodes - Y. R. Nosov - Bog - Springer-Verlag New York Inc. - Plusbog.dk

It gives me great pleasure to learn that this book, whose ori­ gin owes much to the work of American scientists and engineers on semiconductor technology, will reach American and other English­ speaking readers. I am grateful to Plenum Publishing Corporation for arranging the American edition of this book and to Mr. Albin Tybulewicz for his translation, September 5, 1968 Yu. R. Nosov v Preface to the Russian Edition One of the most important applications of semiconductor diodes is their use in electronic pulse circuits. The response of these diodes under switching conditions is governed by the phenomena of accumulation and dispersal of non­ equlibrium carriers, which are also observed in other p-n junction devices. It was found in the late 1940''s that when point-contact ger­ manium diodes were used in circuits through which short (several tenths of a microsecond) electrical pulses were being passed, the 1 effective reverse resistance of these diodes decreased considerably below the static value. Further studies showed that when a diode was switched rapidly from the forward to the reverse direction, an anomalously large reverse current flowed for some time. In view of the importance of this phenomenon in the efforts to reduce the response time of pulse circuits, many investigations of the phenomenon were carried out and these investigations pro­ vided the basis of a theory of transient processes in semiconductor diodes.

DKK 663.00
1

Networking and Protocol Layering - Nirmala Shenoy - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Networking and Protocol Layering - Nirmala Shenoy - Bog - Springer-Verlag New York Inc. - Plusbog.dk

This book is directed towards some of the recent networking demands that would be better addressed by a clean slate approach both from an architectural and protocols perspective. Two examples are discussed, one targeting the current Internet as an example of wired networks and the second focusing on mobile ad hoc networks as an example of wireless networks. The scope of the book shows how one can transition out of the current networking and layering principles and hence the constraints imposed by them.

DKK 326.00
1

Contemporary Methods for Speech Parameterization - Todor Ganchev - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Contemporary Methods for Speech Parameterization - Todor Ganchev - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Contemporary Methods for Speech Parameterization offers a general view of short-time cepstrum-based speech parameterization and provides a common ground for further in-depth studies on the subject. Specifically, it offers a comprehensive description, comparative analysis, and empirical performance evaluation of eleven contemporary speech parameterization methods, which compute short-time cepstrum-based speech features. Among these are five discrete wavelet packet transform (DWPT)-based, six discrete Fourier transform (DFT)-based speech features and some of their variants which have been used on the speech recognition, speaker recognition, and other related speech processing tasks. The main similarities and differences in their computation are discussed and empirical results from performance evaluation in common experimental conditions are presented. The recognition accuracy obtained on the monophone recognition, continuous speech recognition and speaker recognition tasks is contrasted against the one obtained for the well-known and widely used Mel Frequency Cepstral Coefficients (MFCC). It is shown that many of these methods lead to speech features that do offer competitive performance on a certain speech processing setup when compared to the venerable MFCC. The last does not target the promotion of certain speech features but instead aims to enhance the common understanding about the advantages and disadvantages of the various speech parameterization techniques available today and to provide the basis for selection of an appropriate speech parameterization in each particular case.

DKK 434.00
1

Growth of Crystals - - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Growth of Crystals - - Bog - Springer-Verlag New York Inc. - Plusbog.dk

This volume, as the previous ones, consists primarily of review artic1es. However, it also contains a large quantity of original material on the growth of crystals and films. Priority is given to experimental work. Only two artic1es are concerned exc1usively with the theory of crystal growth. Theoretical aspects are treated in several others. This volume is divided into three parts. Part I, "Epitaxy and Transformations in Thin Films," stems from the current broad application of lasers and optical effects in general to crystal growth (in particular, the growth of thin films). The first three artic1es of the book are devoted to this topic. In particular, the laser pulse vaporization method, for which a comparatively slow deposition rate is typical (which should not always be viewed as a drawback), is distinguished by the unique kinetics of the initial growth stages. These are not entirely explained. However, this method is completely suitable for oriented or generally ordered growth of films under otherwise equal conditions. Another artic1e of this section is based on use of ultrashort (down to picosecond) laser pulses. It emphasizes the nonequilibrium processes of crystallization and decrystallization that are characteristic for such influences. In particular, material heated above its melting point and metastable states in the semiconductor melt exhibit these qualities.

DKK 663.00
1

Getting the Most out of Your Mentoring Relationships - Donna J. Dean - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Getting the Most out of Your Mentoring Relationships - Donna J. Dean - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Mentorship practice has been part of the human experience since the Golden Age of Greece. Engaging with a mentor as a way to learn and achieve one''s full potential is an ancient and respected practice. And, it has been the keystone on which the Association for Women in Science (AWIS) has built its program over the past three decades. Trailblazers, such as Dr. Estelle Ramey and Dr. Anne Briscoe, experienced first-hand the isolation of women in the country''s male-dominated scientific establishment and worked to build an organization that would promote women through mentoring relationships. Dr. Ramey, who earned her degree in p- siology and biophysics and taught at Georgetown Medical School, was a we- known feminist speaker and writer. Noted for her great wit, she once quipped, ''''I was startled to learn that ovarian hormones are toxic to brain cells. '''' Throughout her career, Dr. Ramey decried sexist comments and situations that treated women as less than fully human. She felt very strongly about how little, if anything, it took to extend a helping hand to someone else in a way that could really make a huge difference in her life. As she wrote in her book called Letters to our Grandchildren, ''''If I could leave you with any advice, it would be to speak words of caring not only to those closest to you, but to all the hungry ears you encounter on your journey through a cold world.

DKK 519.00
1

The Social and Economic Impact of New Technology 1978-84: A Select Bibliography - - Bog - Springer-Verlag New York Inc. - Plusbog.dk

The Social and Economic Impact of New Technology 1978-84: A Select Bibliography - - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Silicon chip technology; microprocessor technology; information technology; or quite simply new technology. These are some of the names representing the microelectronics revolution depending upon the audience being addressed by speaker or writer. No previous new industrial development has caused such widespread publicity and discussion amongst users and researchers as the new technology. Concern is being expressed about the effects of new technology on employment, job satisfaction, social life, leisure activities and the economics of commerce and industry. The late 70s saw many doom-laden predictions of those effects but by 1983 both management and trade unions were taking a more objective view of the social and economic impacts, and many correspondents now see the new technology as a means of opening up new industries and overcoming the effects of world recessions. The "chip" has involved the factory floor, the office, the supermarket and the home. Electronic funds transfer, electronic shopping, microelectronic domestic appliances, word processors and microprocessor-controlled machinery mean that the new technology has pervaded all aspects of social and economic life, and the developed countries are now coming to accept it as part of society as a whole. Inevitably the flood of literature on the social and economic impacts of new technology has been overwhelming. Unfortunately the quality of information and arguments propagated at conferences, in journal papers and research reports has indicated that there has been little quantifiable evidence available on the effects of these impacts.

DKK 663.00
1

Handhelds in Medicine - - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Handhelds in Medicine - - Bog - Springer-Verlag New York Inc. - Plusbog.dk

Have you ever wanted to calculate the predicted peak flow for one of your asthmatic patients without spending valuable minutes searching for that confounded little slide rule gizmo? Wouldn''t it be great if you could somehow remember all Mrs. Jones'' medications when the nursing home calls to see if it''s OK to treat her acutely elevated blood pressure with some atenolol? Handheld computers are emerging as the stethoscopes of the twenty-first century, and no clinician should be without this essential tool. These small, easy-to-use devices are now powerful enough to help clinicians manage information and make medical decisions at the point of care. This comprehensive how-to guide targets all levels of handheld computer users, from novices to experts, and demonstrates how to make the most of handheld computers in any medical practice. Designed with easy-to-understand, hands-on exercises for each new skill presented, this book begins with choosing a handheld and "getting to know" your new device. It then progresses through downloading and installing software, using charge capture and e-prescription programs, Internet and evidence-based resources for your device, designing and programming your own programs, and going wireless. Written by three experienced family medicine clinicians, Handhelds in Medicine is designed to improve every day practice for any busy health professional. There are chapters written for and by nearly every health professional, including nurses, physician assistants and speech pathologists. Reviews of handheld devices and websites will be kept current at www.handheldsinmedicine.com

DKK 434.00
1