Remotely sensed hyperspectral imaging is a technique that generates hundreds of spectral bands at different wavelength channels for the same area on the surface of the Earth. Computationally effective processing of th...
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ISBN:
(纸本)9781424456499
Remotely sensed hyperspectral imaging is a technique that generates hundreds of spectral bands at different wavelength channels for the same area on the surface of the Earth. Computationally effective processing of these image cubes can be greatly beneficial in many application domains, including environmental modeling, risk/hazard prevention and response, or defense/security. Withthe aim of providing an overview of recent developments and new trends in the design of parallel and distributed systems for hyperspectral image analysis, this paper discusses and inter-compares four different strategies for efficiently implementing a standard hyperspectral image processing chain: 1) commodity Beowulf-type clusters, 2) heterogeneous networks of workstations, 3) field programmable gate arrays (FPGAs), and 4) graphics processing units (GPUs). Combined, these parts deliver a snapshot of the state-of-the-art in those areas, and a thoughtful perspective on the potential and emerging challenges of adapting high performance computing systems to remote sensing problems.
Jamming style Denial-of-Service attack is the transmission of radio signals that disrupt communications by decreasing the signal to noise ratio. this kind of attack can be easily launched by jammer through either bypa...
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the proceedings contain 26 papers. the topics discussed include: detection and localization sensor assignment with exact and fuzzy locations;minimum variance energy allocation for a solar-powered sensor system;adaptiv...
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ISBN:
(纸本)3642020844
the proceedings contain 26 papers. the topics discussed include: detection and localization sensor assignment with exact and fuzzy locations;minimum variance energy allocation for a solar-powered sensor system;adaptive in-network processing for bandwidth and energy constrained mission-oriented multi-hop wireless networks;online coding for reliable data transfer in lossy wireless sensor networks;compressed rf tomography for wireless sensor networks: centralized and decentralized approaches;a sensor network system for measuring traffic in short-term construction work zones;MCP: an energy-efficient code distribution protocol for multi-application WSNs;optimal allocation of time-resources for multihypothesis activity-level detection;efficient sensor placement for surveillance problems;distributed generation of a family of connected dominating sets in wireless sensor networks;and performance of bulk data dissemination in wireless sensor networks.
Cooperative transmission is an efficient technique to realize diversity gain in wireless fading channels via a distributed way. In this paper, we consider a wireless network composed of a source, two parallel relays a...
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Previous works have projected that the peak performance of FPGAs can outperform that of the general purpose processors. However no work actually compares the performance between FPGAs and CPUs using the standard bench...
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ISBN:
(纸本)9780769537160
Previous works have projected that the peak performance of FPGAs can outperform that of the general purpose processors. However no work actually compares the performance between FPGAs and CPUs using the standard benchmarks such as the UNPACK benchmark. We propose and implement an FPGA-based hardware design of the UNPACK benchmark, the key step of which is LU decomposition with pivoting. We introduce a fine-grained pipelined LU decomposition algorithm that enables optimum performance by exploiting fine-grained pipeline parallelism. A scalable linear array of processing elements (PEs), which is the core component of our hardware design, is proposed to implement this algorithm. To the best of our knowledge, this is the first reported FPGA-based pipelined implementation of LU decomposition with pivoting. A total of 19 PEs can be integrated into an Altera Stratix II EP2S130F1020C5 on our self-designed development board. Experimental results show that the speedup up to 6.14 can be achieved relative to a Pentium 4 processor for the UNPACK benchmark.
HLA-based simulations, as any distributed computing application, can undergo critical performance issues due to load imbalances on large-scale, heterogeneous, non-dedicated distributed systems. Such imbalances are pro...
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ISBN:
(纸本)9780769538686
HLA-based simulations, as any distributed computing application, can undergo critical performance issues due to load imbalances on large-scale, heterogeneous, non-dedicated distributed systems. Such imbalances are produced by HLA simulation entities that can dynamically change their computation and communication load during their execution time, so an initial static load deployment is incapable of providing simulations complete and even distributed resources usage. Moreover, because the computing resources are non-dedicated, unknown external applications can generate load for any computing resource, increasing the imbalances' unpredictability. thus, in order to re-allocate resources for an HLA simulation during its execution time, an hierarchical dynamic load balancing system is introduced. the system manages a simulation's workload by monitoring the distributed load through the MDS Grids' service;by identifying load imbalances according to a load sharing policy;by re-allocating resources according to defined policies;and by migrating federates through the GRAM Grids' service, a migration proxy, and peer-to-peer state transfer. By keeping the load evenly partitioned on the distributed system, such a devised system successfully improved the simulations' performance. the experimental results and comparative analyses between balanced and non-balanced simulations proved the efficiency of the proposed dynamic load balancing system.
In this paper, we propose the distributed algorithm for joint optimal cross-layer design in multi-radio multi-channel multi-hop networks. the main objective of this work is to joint optimize injected rate and resource...
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the proceedings contain 33 papers. the topics discussed include: on the efficiency of LifeBelt based crowd evacuation;an aspect-oriented approach for disaster prevention simulation workflows on supercomputers, cluster...
ISBN:
(纸本)9780769538686
the proceedings contain 33 papers. the topics discussed include: on the efficiency of LifeBelt based crowd evacuation;an aspect-oriented approach for disaster prevention simulation workflows on supercomputers, clusters, and grids;benchmarking memory management capabilities within ROOT-Sim;multi-user gaming on the grid using a service oriented HLA RTI;MediVol: a practical initial evaluation of refined, 3D, interactive volumetric representations of soft tissue pathologies in virtual environments;comparing the end to end latency of an immersive collaborative environment and a video conference;joint hierarchical nodes based user management (JoHNUM) infrastructure for the development of scalable and consistent virtual worlds;exploring an information framework for consistency maintenance in distributed interactive applications;statemachine matching in BOM based model composition;and dynamic load balancing using grid services for HLA-based simulations on large-scale distributed systems.
the proceedings contain 54 papers. the topics discussed include: an experimental study of diversity with off-the-shelf antivirus engines;simulating fixed virtual nodes for adapting wireline protocols to MANET;seed sch...
ISBN:
(纸本)9780769536989
the proceedings contain 54 papers. the topics discussed include: an experimental study of diversity with off-the-shelf antivirus engines;simulating fixed virtual nodes for adapting wireline protocols to MANET;seed scheduling for peer-to-peer networks;proximity-aware distributed mutual exclusion for effective peer-to-peer replica management;towards improved overlay simulation using realistic topologies;analysis of round-robin implementations of processor sharing, including overhead;comparison of price-based static and dynamic job allocation schemes for grid computing systems;a rule based co-operative approach for cell selection in high speed cellular networks;sharing private information across distributed databases;energy-aware prefetching for parallel disk systems;attribute-based prevention of phishing attacks;TTM based security enhancement for inter-domain routing protocol;and introducing probability in RFID reader-to-reader anti-collision.
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