This book presents a review of the latest advances in speech and video compression, computer networking protocols, the assessment and monitoring of VoIP quality, and next generation network architectures for multimedia services. The book also concludes with three case studies, each presenting easy-to-follow step-by-step instructions together with challenging hands-on exercises. Features: provides illustrative worked examples and end-of-chapter problems; examines speech and video compression techniques, together with speech and video compression standards; describes the media transport protocols RTP and RTCP, as well as the VoIP signalling protocols SIP and SDP; discusses the concepts of VoIP quality of service and quality of experience; reviews next-generation networks based on the IP multimedia subsystem and mobile VoIP; presents case studies on building a VoIP system based on Asterisk, setting up a mobile VoIP system based on Open IMS and Android mobile, and analysing VoIP protocols and quality.
This book explores the diverse types of Schrödinger equations that appear in nonlinear systems in general, with a specific focus on nonlinear transmission networks and Bose–Einstein Condensates. In the context of nonlinear transmission networks, it employs various methods to rigorously model the phenomena of modulated matter-wave propagation in the network, leading to nonlinear Schrödinger (NLS) equations. Modeling these phenomena is largely based on the reductive perturbation method, and the derived NLS equations are then used to methodically investigate the dynamics of matter-wave solitons in the network. In the context of Bose–Einstein condensates (BECs), the book analyzes the dynamical properties of NLS equations with the external potential of different types, which govern the dynamics of modulated matter-waves in BECs with either two-body interactions or both two- and three-body interatomic interactions. It also discusses the method of investigating both the well-posedness and the ill-posedness of the boundary problem for linear and nonlinear Schrödinger equations and presents new results. Using simple examples, it then illustrates the results on the boundary problems. For both nonlinear transmission networks and Bose–Einstein condensates, the results obtained are supplemented by numerical calculations and presented as figures.
This book highlights the methods to engineer dissipative and magnetic nonlinear waves propagating in nonlinear systems. In the first part of the book, the authors present methodologically mathematical models of nonlinear waves propagating in one- and two-dimensional nonlinear transmission networks without/with dissipative elements. Based on these models, the authors investigate the generation and the transmission of nonlinear modulated waves, in general, and solitary waves, in particular, in networks under consideration. In the second part of the book, the authors develop basic theoretical results for the dynamics matter-wave and magnetic-wave solitons of nonlinear systems and of Bose–Einstein condensates trapped in external potentials, combined with the time-modulated nonlinearity. The models treated here are based on one-, two-, and three-component non-autonomous Gross–Pitaevskii equations. Based on the Heisenberg model of spin–spin interactions, the authors also investigate the dynamics of magnetization in ferromagnet with or without spin-transfer torque. This research book is suitable for physicists, mathematicians, engineers, and graduate students in physics, mathematics, and network and information engineering.
The world around us is filled with subtle lighting effects, but until recently it was not possible to duplicate these real-world effects in computer games because of the limits of consumer graphics hardware. Advanced Lighting and Materials with Shaders explains the principles of lighting theory and discusses how to create realistic lighting that takes full advantage of the capabilities of modern hardware. Topics include the physics of light, raytracing and related techniques, objects and materials, lighting and reflectance models, implementing lights in shaders, spherical harmonic lighting, spherical harmonics in DirectX, and real-time radiosity.Upon reading this text, you will understand the underlying physics of light and energy; learn about the visual features of different materials and how they can be modeled for real-time graphics; find out about the different lighting models; discover how real-time techniques compare to ray tracing; learn to use the provided shader implementations to implement lights and realistic materials in real time.Accompanying CD-ROM includes all the code in the book with resources (models, textures, probes, etc.) needed to run the programs, along with the SDKs and libraries needed to build the programs and luminance Radiosity Studio, an advanced radiosity program.
Annotation This ground-breaking book offers professionals a comprehensive, in-depth presentation of GPRS (general packet radio service). The book helps practitioners understand how this system is used as a major building block technology for the emerging mobile Internet. It explores the most critical aspects of GPRS in great detail, and offers a real-world understanding of the inevitable implementation challenges engineers will face in the field.
From the Pharaohs to Fanon, Dictionary of African Biography provides a comprehensive overview of the lives of the men and women who shaped Africa's history. Unprecedented in scale, DAB covers the whole continent from Tunisia to South Africa, from Sierra Leone to Somalia. It also encompasses the full scope of history from Queen Hatsheput of Egypt (1490-1468 BC) and Hannibal, the military commander and strategist of Carthage (243-183 BC), to Kwame Nkrumah of Ghana (1909-1972), Miriam Makeba and Nelson Mandela of South Africa (1918 -).
This richly illustrated textbook delivers a functional vision of dog behaviors. Daily applicable, it offers practical solutions for canine behavioral care with a consistently medical approach to disorders. Readers find a thorough introduction to factors influencing behavior, the canine neuroanatomy and physiology, psychopathologies, as well as treatment options. Drawing on the latest studies in neuroscience, ethology, psychology, and psychiatry, as well as the clinical experience of its expert authors, this guide is both comprehensive and accessible. Multiple clinical case studies illustrate and support presented details on medication and therapies. Behavioral pathology is one of the main challenges in veterinary medicine. Not only are they a cause of suffering for the animal, but they can also affect the quality of the relationship with the pet owners or pose a danger to society. Hence, treatment of these behavioral disorders requires an integrative approach to canine health and well-being. The book's easy-to-access and descriptive structure allows many audiences to understand a subject area that is all too often considered complex. It addresses veterinary students, practitioners, and future expert veterinarians seeking approach to deep knowledge, as well as all other dog professionals curious to discover a complementary view with respect for the animal and owner.
This monograph presents an application of concepts and methods from algebraic topology to models of concurrent processes in computer science and their analysis. Taking well-known discrete models for concurrent processes in resource management as a point of departure, the book goes on to refine combinatorial and topological models. In the process, it develops tools and invariants for the new discipline directed algebraic topology, which is driven by fundamental research interests as well as by applications, primarily in the static analysis of concurrent programs. The state space of a concurrent program is described as a higher-dimensional space, the topology of which encodes the essential properties of the system. In order to analyse all possible executions in the state space, more than “just” the topological properties have to be considered: Execution paths need to respect a partial order given by the time flow. As a result, tools and concepts from topology have to be extended to take privileged directions into account. The target audience for this book consists of graduate students, researchers and practitioners in the field, mathematicians and computer scientists alike.
An H(b) space is defined as a collection of analytic functions that are in the image of an operator. The theory of H(b) spaces bridges two classical subjects, complex analysis and operator theory, which makes it both appealing and demanding. Volume 1 of this comprehensive treatment is devoted to the preliminary subjects required to understand the foundation of H(b) spaces, such as Hardy spaces, Fourier analysis, integral representation theorems, Carleson measures, Toeplitz and Hankel operators, various types of shift operators and Clark measures. Volume 2 focuses on the central theory. Both books are accessible to graduate students as well as researchers: each volume contains numerous exercises and hints, and figures are included throughout to illustrate the theory. Together, these two volumes provide everything the reader needs to understand and appreciate this beautiful branch of mathematics.
Is the portrait of God revealed in Scripture fundamentally intelligible? The biblical accounts of God reveal seemingly contradictory themes: God's holiness and narratives telling of his anger; the Divine Omnipotence faced with the Impossible; the suffering Christ upon the Cross and the transcendent Trinity of Persons in God; the unique Savior and the universality of God's salvific will; and so forth. How are we to hold together all of this data without denying any aspect of the mystery of God? Must we give into our ambient culture's sense that the biblical God cannot be taken seriously by truly discerning and rational minds when they try to understand "the Divine"? Or, in the midst of this apparent contradiction, can we find the lines of harmony in the revealed mysteries? In Divine Speech in Human Words, Fr. Emmanuel Durand unties some of the knots that face us when we reflect on the God of biblical Revelation. In each of the essays gathered here, Fr. Durand sympathetically articulates the tensions and apparent contradictions experienced by contemporary minds as they strive to understand the revealed truth of God. A whole host of topics are covered in this volume: the Cross and the revelation of the Trinity; God's holiness and transcendence; divine immutability and the sorrow of a loving God; Divine Providence and human prayer; the fatherhood of God and eschatology; Christ's way of life; and many others. Drawing philosophical insights from the Thomistic tradition as his intellectual tools, Fr. Durand nonetheless emphasizes the importance of a properly theological mode of reflection, allowing these issues to be illuminated by the revealed truth of Sacred Scripture. Thus, for each of these difficult topics, he shows that a vital theological response must not limit itself to mere logical rigor but, rather, requires metaphysical insight and, above all, sapiential appreciation of God's revealed word. With such instruments in hand, each essay approaches the tensions of biblical revelation with an eager readiness to show how a thoughtful Thomistic practice of biblical theology can guide faith as it seeks an understanding of both contemporary and perennial theological problems.
This ground-breaking resource offers you a detailed treatment of EDGE and its critical role in the development of the mobile Internet. The book explains how this global radio based high-speed mobile data standard can be introduced into GSM/GPRS networks, improving data transmission speeds to support multimedia services. It enables you to become thoroughly knowledgeable of EDGE specifications and covers concepts pertaining to several domains, including RF, signal processing, digital communications and communication networks.
Comme un exutoire, ce mémoire des aurores représente la renaissance de l’auteur. Ce dernier y illustre tous les obstacles majeurs qui ont jonché son existence jusqu’à présent, en démontrant les moyens employés pour les surmonter. À l’exemple d’un feu polysémique, l’ouvrage nous montre les moments d’épreuves qui ont façonné la personnalité d’Emmanuel Mabondo, l’aidant ainsi à sortir de sa zone de confort pour accomplir ses objectifs. Dans la quête d’une flamme rédemptrice, il effectue un parallèle entre son histoire et celle de son pays, plus précisément celle de son peuple. À PROPOS DE L'AUTEUR !--StartFragment--Participer au développement de son continent et de son pays, telle est l’ambition que porte Emmanuel Mabondo quand il prend la plume. Il croit fermement que l’échange des idées, suivi d’actions concrètes, est primordial pour l’émancipation des siens. C’est d’ailleurs dans cet ordre d'idées qu’il écrit TiYa, son premier ouvrage.!--EndFragment--
Joli coup pour Carmin. Le fleuron minier français signe un partenariat historique avec la Chine afin d’exploiter un exceptionnel gisement de cuivre au Congo. Annoncé en grande pompe par les gouvernements respectifs, soutenu par les banquiers d’affaires, le projet Kisanga doit être inauguré dans trois mois. Un délai bien trop court pour Olivier Martel, l’ingénieur dépêché sur place pour le piloter, mais en principe suffisant pour les barbouzes chargées de retrouver un dossier secret susceptible de faire capoter toute l’opération s’il tombait entre de mauvaises mains. Celles de Raphaël Da Costa par exemple, un journaliste qui s’est déjà frotté par le passé à Carmin et aux zones grises du pouvoir. Trois mois, le temps d’une course-poursuite haletante au coeur de la savane katangaise et sur les pistes brûlantes du Kivu, pour découvrir ce que dissimule le nom si prometteur de Kisanga. Du suspense, du rythme et un réalisme redoutable irriguent ce thriller implacable sur les nouveaux jeux d’influence en Afrique.
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