Kategoria BISAC: Computers >> Networking - General

Collaborative Network Organizations (CNO) corresponds to a very active and steadily growing area. For instance, Virtual enterprises/Virtual Organizations (PVC) suggest new ways of work and put the emphasis on collaborative networks of human actors.

Further to these main lines, other collaborative forms and patterns of collaborative behavior are emerging, not only in industry, but also in service sector, as well as governmental and non-government social organizations, e.g. the collaborative networks for rescue tasks in disaster situations, time bank organizations, etc.

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Advances in mobile computing, wireless communications, mobile positionaing, and sensor technologies have given rise to a new class of context-aware mobile and ubiquitous applications.This book provides thorough insights and significant research developments on mobile technologies and services.

Over two-dimensional Folded Optical Orthogonal Coding (FOOC) network, a simple threshold detection scheme is illustrated to detect the number of simultaneous network users and to adjust the detection threshold value instantaneously. A special wavelength called pilot wavelength is added into the original transmission patterns of every network user. At the receiver, we can acquire the number of simultaneous network users from the power of the pilot wavelength. Consequently, by adjusting the detection power threshold to the optimum threshold value, we can decrease the bit error rate (BER) and...

Modern day computer systems allow us to capture enormous datasets. In many cases this data represents a network of connections between entities, such friendship patterns in social networks, communication networks or biological pathways. Fully analyzing these massive network datasets is challenging on a number of levels and many problems remain unsolved. This book addresses the problem from the perspective of information visualization, which uses computers to generate interactive images of the data under analysis. It gives an overview of the state of the art, describes potential pitfalls and...

The design focus on Peer-to-Peer (P2P) networks had been on low-complexity content mapping and efficient search mechanisms, and many of the existing P2P applications provide an efficient substrate for sharing small files like MP3 or images because searching efficiency is essential to the overall performance. For bulk contents like multimedia documents or scientific data sets, however, the data transfer efficiency becomes critical to the overall distribution efficiency. This work explores the use of P2P overlays on distributing bulk contents, and the goal is to improve the distribution...

An analytical overview of the state of the art, open problems, and future trends in heterogeneous parallel and distributed computing

This book provides an overview of the ongoing academic research, development, and uses of heterogeneous parallel and distributed computing in the context of scientific computing. Presenting the state of the art in this challenging and rapidly evolving area, the book is organized in five distinct parts:

• Heterogeneous Platforms: Taxonomy, Typical Uses, and Programming Issues

• Performance Models of Heterogeneous Platforms and...

Deploying QoS for IP Next Generation Networks: The Definitive Guide provides network architects and planners with insight into the various aspects that drive QoS deployment for the various network types. It serves as a single source of reference for businesses that plan to deploy a QoS framework for voice, video, mobility and data applications creating a converged infrastructure. It further provides detailed design and implementation details for various service deployments across the various Cisco platforms such as the CRS-1, 12000, 7600 & 7200 series routers that are widely deployed...

Peer-to-peer computing has gained significant attention from both industry and research communities in the past decade as the number of users worldwide continues to grow along with demand for mobile computing.

In the not too distant future, internet access will be dominated by wireless networks. With that, wireless edge using optical core next-generation networks will become as ubiquitous as traditional telephone networks. This means that telecom engineers, chip designers, and engineering students must prepare to meet the challenges and opportunities that the development and deployment of these technologies will bring.

Bringing together cutting-edge coverage of wireless and optical networks in a single volume, Internet Networks Wired, Wireless, and Optical...

All you need to know about Storage Area Networks

The amount of data of an average company doubles every year. Thus, companies who own 1TB of data today will own 32TB in five years. Storage networks help to tame such data quantities and to manage this data growth efficiently. Since stored data and information are the biggest asset of any company, anyone who is involved in the planning or the operation of IT systems requires a basic knowledge of the principle and the use of storage networks.

Storage Networks Explained covers the fundaments, techniques and functions of...

-- Step by step approach shows how to analyze networks carrying mission critical data such as voice over IP applications, streaming video and e-commerce.
-- Shows how to:
-- prevent network meltdowns before they occur
-- to collect, analyze and interpret MIBS using network-monitoring tools.
-- Learn how to analyze MIB output from Cisco Network Monitoring Tools, such as Cisco Works and Nortel.
-- Case studies on how leading financial firms use MIBS to prevent network failure before it occurs!

Current research works on a tiny problem and ignores
other issues. When someone tries to combine these
efforts, mismatches arise. Consider a combat sensor
network, which uses minimal transmitter power and
close node spacing. There are several drawbacks:
(1) Many sensors could increase physical and
electronic discovery. (2) More network congestion.
(3) Fast network death. (4) Information is late and
vague. (5) The human operator is at risk.

This book integrates software, hardware, and security
(being undetected) for supporting the network. The
approach could solve problems with...

Recent advances in Micro-Electro-Mechanical Systems
(MEMS) and low-power short-range radios have enabled
rapid development of wireless sensor networks.
Future sensor networks are anticipated to include
hundreds or thousands of these devices in many
applications, such as capturing multimedia content
for surveillance, structural health monitoring,
tracking of accidental chemical leaks, machine
failures, earthquakes and intrusion detection.
With the increase of sensor applications, a number of
challenging problems related to the network protocol
design have emerged - the most important...

Based on recent technological advances, the manufacturing of a large number of low cost wireless sensors became technically and economically feasible. Thousands of these sensors can be networked as a wireless network for many applications that require unattended, long-term operations. One of the critical challenges to making sensor networks more pervasive and secure is the severe resource constraints.This dissertation explores specific security issues associated with sensor networks through four related themes. First, a taxonomy of security attacks and countermeasures for sensor networks...

Constitutes the refereed joint post-workshop proceedings of seven international events, held in Las Palma de Gran Canaria, Spain, in August 2008 within the scope of Euro-Par 2008, the 14th International Conference on Parallel Computing.

Many location determination systems have recently
been proposed, and most of them are based on one or
more of the following four methods: lateration,
angulation, fingerprinting, and dead-reckoning.
However, existing systems require either dedicated
hardware support or extensive human interaction. This
book, therefore, provides a comprehensive study on
the design, analysis, and evaluation of both indoor
and outdoor localization systems. The book introduces
a new dynamic indoor localization tool called
ARIADNE, it also presents two multidimensional
scaling based algorithms for outdoor sensor...

We study the optimal control of a class of resource
allocation problems characterized by energy-latency
trade-offs in Wireless Sensor Networks (WSN) using
the framework of Discrete Event Systems. Our work is
based on the observation that energy of wireless
nodes can be greatly saved by introducing some delay
of task completion time. Specifically, we consider a
family of problems motivated by WSN such as Dynamic
Transmission Control and Dynamic Voltage Scaling,
where the objective is to minimize energy
consumption while satisfying real-time operating
constraints. Using advanced...

Internet worm attacks have become increasingly more frequent and have had a major impact on the economy, making the detection and prevention of these attacks a top security concern. Several counter-measures have been proposed and evaluated in recent literature. However, the effect of these proposed defensive mechanisms on legitimate competing traffic has not been analyzed. This book presents a comparative analysis of the effectiveness of several of these proposed mechanisms, including a measure of their effect on normal web browsing activities. This book also presents a study of the behavior...

Over the years, scientific applications have become more complex and more data intensive. Especially large scale simulations and scientific experiments in areas such as physics, biology, astronomy and earth sciences demand highly distributed resources to satisfy excessive computational requirements. Increasing data requirements and the distributed nature of the resources made I/O the major bottleneck for end-to-end application performance. Existing systems fail to address issues such as reliability, scalability, and efficiency in dealing with wide area data access, retrieval and processing....

Many new multicast applications emerging from the Internet, such as TV over the Internet, Radio over the Internet, Video Streaming multi-point, etc., need the following resource requirements: bandwidth consumption, end-to-end delay, packet loss ratio, etc. It is therefore necessary to formulate a proposal to specify and provide for these kinds of applications the resources necessary for them to function well. In this thesis, we propose a multi-objective traffic engineering scheme using different distribution trees to multicast several flows. In this case, we are using the multipath approach...