the proceedings contain 75 papers. the topics discussed include: a layered virtual organization architecture for grid;scalable contract net based resource allocation strategies for grids;an experimental analysis for m...
ISBN:
(纸本)9780769534435
the proceedings contain 75 papers. the topics discussed include: a layered virtual organization architecture for grid;scalable contract net based resource allocation strategies for grids;an experimental analysis for memory usage of GOS core;a data-parallel algorithm to reliably solve systems of nonlinear equations;an effective structure for algorithmic design and a parallel prefix algorithm on metacube;a parallel algorithm for block tridiagonal systems;parallelization and acceleration scheme of multilevel fast multipole method;parallel approximate multi-pattern matching on heterogeneous cluster systems;switch-based packing technique for improving token coherence scalability;location consistency model revisited: problem, solution and prospects;an enhancer of memory and network for cluster and its applications;honeycomb: a community-based system for distributed data integration and sharing;and set-to-set disjoint paths routing in dual-cubes.
the proceedings contain 9 papers. the topics discussed include: using agile practices to solve global software development problems-a case study;establishing a culture for increased quality awareness using the 4 C app...
ISBN:
(纸本)9781479952069
the proceedings contain 9 papers. the topics discussed include: using agile practices to solve global software development problems-a case study;establishing a culture for increased quality awareness using the 4 C approach;GSD SIM: a global software development game;FTS-SPM: a software process model for follow the sun development: preliminary results;combining models with code: a tale of two languages;managing requirements in globally distributed cots customization;PSAFactory: an end-user programming tool for building participatory sensing applications;stigmergy-based collaborative conceptual modeling;and citizen fusion service platform for smart cities: architecture, technologies and practice.
Wireless Sensor Networks is extensively used in many of applications related to different fields. Some of those applications deal with confidential and critical data that must be protected from unauthorized access. So...
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ISBN:
(纸本)9781479986613
Wireless Sensor Networks is extensively used in many of applications related to different fields. Some of those applications deal with confidential and critical data that must be protected from unauthorized access. Some other systems use WSNs that are deployed in very harsh environments with limited energy resources. those systems cannot tolerate network failures that can be caused by network intruders. In this paper, an efficient intrusion detection model is introduced. the model uses intelligent techniques to detect intrusions. Two different architectures are introduced. the first architecture represents the level of sensor node, sink node, and base station. the second architecture represents the levels of sensor and sink nodes. this work proposes two intrusion detection algorithms, one uses a supervised learning mechanism to be used on the level of the sensor node and the other uses an unsupervised learning mechanism to be used on the levels of boththe sink node and base station. the output of the algorithms is a set of detection rules which are structured in the form of binary tree. the introduced algorithms provided a high detection accuracy using less number of selected features, compared to previous work for intrusion detection, which decreases the complexity and the processing time. the proposed learning algorithms used only 10% of the data for training. An enhancement for J48 classification algorithm is also introduced which decreases the size of the algorithm's decision tree and makes it suitable to be used for intrusion detection in WSNs.
Virtualization is the foundation for cloud computing, and the virtualization can not be achieved without software defined, elastic, flexible and scalable virtual layers. Unfortunately, if multiple virtual storage devi...
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ISBN:
(纸本)9781479940875
Virtualization is the foundation for cloud computing, and the virtualization can not be achieved without software defined, elastic, flexible and scalable virtual layers. Unfortunately, if multiple virtual storage devices are chained together, the system may be subject to severe performance degradation. While the read-ahead (RA) mechanism in storage devices plays a very important role to improve I/O performance, RA may not be effective as expected for multiple virtualization layers, since it is originally designed for one layer only. When I/O requests are passed through a long I/O path, they may trigger a chain reaction and lead to unnecessary data transmission and thus bandwidth waste. In this paper, we study the dynamic behavior of RA through multiple I/O layers and demonstrate that if controlled well, RA can greatly accelerate I/O speed. We present RAFlow, a RA control mechanism, to effectively improve I/O performance by strategically expanding RA window at each layer. Our real-world experiments show that it can achieve 20% to 50% performance improvement in I/O paths with up to 8 virtualized storage devices.
作者：
Martins, PauloSousa, LeonelSiPS
INESC-ID Instituto Superior Técnico Universidade de Lisboa Rua Alves Redol 9 Lisboa1000-029 Portugal
the acceleration of cryptographic applications on embedded devices is a topic of increasingly importance, due to their massive use. In this paper, the efficiency of these devices when operating as cryptographic accele...
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Efficient evaluation of distributed computation on arge-scale data is prominent in modern scientific computation;especially analysis of big data, image processing and data mining applications. this problem is particul...
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ISBN:
(纸本)9783662453919;9783662453902
Efficient evaluation of distributed computation on arge-scale data is prominent in modern scientific computation;especially analysis of big data, image processing and data mining applications. this problem is particularly challenging in distributed environments such as campus clusters, grids or clouds on which the basic computation routines are offered as web/cloud services. In this paper, we propose a locality-aware workflow-based solution for evaluation of large-scale matrix expressions in a distributed environment. Our solution is based on automatic generation of BPEL workflows in order to coordinate long running, asynchronous and parallel invocation of services. We optimize the input expression in order to maximize parallel execution of independent operations while reducing the matrix transfer cost to a minimum. Our approach frees the end-user of the system from the burden of writing and debugging lengthy BPEL workflows. We evaluated our solution on realistic mathematical expressions executed on large-scale matrices distributed on multiple clouds.
the daily spoken variety of Arabic is often termed the colloquial or dialect form of Arabic. there are many Arabic dialects across the Arab World and within other Arabic speaking communities. these dialects vary widel...
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ISBN:
(纸本)9782951740884
the daily spoken variety of Arabic is often termed the colloquial or dialect form of Arabic. there are many Arabic dialects across the Arab World and within other Arabic speaking communities. these dialects vary widely from region to region and to a lesser extent from city to city in each region. the dialects are not standardized, they are not taught, and they do not have official status. However they are the primary vehicles of communication (face-to-face and recently, online) and have a large presence in the arts as well. In this paper, we present the first multidialectal Arabic parallel corpus, a collection of 2,000 sentences in Standard Arabic, Egyptian, Tunisian, Jordanian, Palestinian and Syrian Arabic, in addition to English. Such parallel data does not exist naturally, which makes this corpus a very valuable resource that has many potential applications such as Arabic dialect identification and machine translation.
In this work we present a new filtering variant of pseudorandom bit generation which combines a 2-adic Feedback with Carry Shift Register and the Editing bit-search generator, based on I. Erguler and E. Anarim researc...
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ISBN:
(纸本)9783662438800;9783662438794
In this work we present a new filtering variant of pseudorandom bit generation which combines a 2-adic Feedback with Carry Shift Register and the Editing bit-search generator, based on I. Erguler and E. Anarim research. the generated algorithm uses dynamic blocks for data encryption. Shrinking the block is necessary if low memory is available. the algorithm divides the data block among the cores (the processors) and every core encrypts part of the data file. We show the advantage of using parallel implementation. the experimental statistical results establish the time difference of performance on serial and parallel encryption. the security of the generated bit streams are proven by using NIST, DIEHARD and ENT testing systems.
the development of annotated corpora is a critical process in the development of speech applications for multiple target languages. While the technology to develop a monolingual speech application has reached satisfac...
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ISBN:
(纸本)9782951740884
the development of annotated corpora is a critical process in the development of speech applications for multiple target languages. While the technology to develop a monolingual speech application has reached satisfactory results (in terms of performance and effort), porting an existing application from a source language to a target language is still a very expensive task. In this paper we address the problem of creating multilingual aligned corpora and its evaluation in the context of a spoken language understanding (SLU) porting task. We discuss the challenges of the manual creation of multilingual corpora, as well as present the algorithms for the creation of multilingual SLU via Statistical Machine Translation (SMT).
the proceedings contain 74 papers. the topics discussed include: improved error estimate for an implicit discretization scheme for linear-quadratic control problems with bang-bang solutions;on optimization problems fo...
ISBN:
(纸本)9783662438794
the proceedings contain 74 papers. the topics discussed include: improved error estimate for an implicit discretization scheme for linear-quadratic control problems with bang-bang solutions;on optimization problems for differential inclusions with random initial data;optimal control of nonlinear elliptic pdes - theory and optimization methods;on control synthesis for uncertain differential systems using a polyhedral technique;pontryagin' s type optimality conditions for a distributed control problem arising in endogenous growththeory;analysis and control of the accuracy and convergence of the 1VIL-EM iteration;the reference solution approach to hp-adaptivity in finite element flux-corrected transport algorithms;mixed FEM for second order elliptic problems on polygonal meshes with BEM-based spaces;and assessment of the air quality in Bulgaria - short summary based on recent modelling results.
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