springer us jan 2007 (4 Ergebnisse)

Buch. Zustand: Neu. Neuware - All real surfaces, both those occurring naturally, and those fabricated artificially and with great care, are rough to some degree. It is therefore of interest, and often of importance, to know the extent to which this roughness affects physical p- cesses occurring at a surface. A particularly interesting class of physical processes occurring at a rough surface is the scattering of electromagnetic waves from it, or their transmission through it. In this case the degree of the surface roughness is referred to the wavelength of the waves incident on it. The study of the scattering of electromagnetic waves from rough surfaces has been actively carried out for more than a century now, since Rayleigh's inves- gations of the scattering of a monochromatic plane wave incident normally on a 1 sinusoidal interface between two different media. The first theoretical treatment of the scattering of an electromagnetic wave from a randomly rough surface was due to Mandel'shtam/ in the context of the scattering of light from a liquid s- face. In these pioneering studies the angular dependence of the intensity of the scattered field was calculated by perturbation theory as an expansion in powers of the surface profile function though the first nonzero term, a single scattering approximation.

Buch. Zustand: Neu. Neuware - Nowhere in the scientific progress has the schism in the knowledge been as striking as in the case of vascular mechanics and pathology. This joint subject would serve as a classic example of science developed in two different directions. It provided the motivation to put forth this book and establish a correlation between vascular mechanics and pathology. The book focuses on the artery and arterial diseases. The most fundamental functions of the artery are (1) to serve as a conduit of blood flow and (2) to serve as a container of blood pressure. The artery carries the blood to all organs of the body and it uses pressure to drive the blood through the tissue to provide nourishment. Hence, the artery is both a pipe and a pressure vessel. The artery pulsates about 103,000 times a day along with the beating heart. In a lifetime, the artery sustains cyclic pressure for about 3. 8 billion cycles. This obviously poses a significant challenge to the artery and therefore the artery must be endowed with special structure and properties to meet this challenge. In the event that additional challenges are imposed, such as high blood pressure, it would not be surprising that the artery could 'break down' or become diseased. In the book, we examine the structure and properties of the artery and study the challenges imposed on it with a view to understand the survival of and the development of the diseases in the artery.

Buch. Zustand: Neu. Neuware - The aim of CoreGRID is to strengthen and advance scientific and technological excellence in the area of Grid and Peer-to-Peer technologies in order to overcome the current fragmentation and duplication of effort in this area. To achieve this objective, the workshop brought together a critical mass of well-established researchers (including 145 permanent researchers and 171 PhD students) from a number of institutions which have all constructed an ambitious joint program of activities. Priority in the workshop was given to work conducted in collaboration between partners from different research institutions and to promising research proposals that could foster such collaboration in the future. This book is thefourth volume of the CoreGRID series.The topics in this volume include: - Knowledge and Data Management, - Programming Models, - System Architecture, - Grid Information, Resource and Workflow Monitoring Services, - Resource Management and Scheduling, - Systems, Tools and Environments, -Trust and Security Issues on the Grid.

Buch. Zustand: Neu. Neuware - Cellular Communications is about Service, Technology and Economy. Public awareness and safety is considered the fourth dimension in the equation, that rolls back to impact all of the other three. Mobile communications has become an indispensable element of modem lifestyle. The 3G cellular systems focus on high data-rate multimedia services and a host of respective applications, mostly leisure-time oriented. At the other extreme, mobile communications is a most effective driving force in boosting the economy of developing communities. These two processes may share technology momentum and the economy of scale, but their substantial differences have to be recognized, at the time when the momentum of cellular deployment moves in that direction. The introduction of mobile wireless services to developing communities is challenged by the cost of infrastructure, operations and user terminals of the advanced networks, and the mixture of older generation systems to coexist with the new deployments. Affordability considerations and priority of services inspire innovative architectural and optimization solutions to the infrastructure, choice of applications and user terminals.