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11th International Conference on Advances in Mobile computing and Multimedia, MoMM 2013

作者： Tewari, Babul P. Ghosh, Sasthi C. Department of Computer Science and Engineering Bengal College of Engineering and Technology Durgapur 713 212 West Bengal India Advanced Computing and Microelectronics Unit Indian Statistical Institute 203 B. T. Road Kolkata 700 108 India

ISBN: (纸本)9781450321068

Frequency channels are allocated to the access-points (APs) satisfying the co-channel interference in an IEEE 802.11 WLAN. Very few APs can be activated simultaneously with a conflict-free frequency assignment to them, due to limited number of frequencies. This may lead to a reduced aggregate throughput. We argue that aggregate throughput can significantly be improved by allowing some of the selected interfering APs to be activated with the same frequency but to operate in a fairly time-scheduled manner to satisfy the co-channel interference. We introduce the notion of class and cluster and based on it propose a combined frequency assignment, AP scheduling and association algorithm with the objective of maximizing the aggregate throughput. Simulation results show that the proposed algorithm is superior than both the algorithms that ignores the co-channel interference altogether by assuming proper frequency planning and that allows to activate only those APs for which a conflict-free frequency assignment exists. © 2013 ACM.

关键词： Scheduling

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Forensic acquisition and analysis of VMware virtual machine artifacts

Forensic acquisition and analysis of VMware virtual machine ...

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International Multi-Conference on Automation, computing, Communication, Control and Compressed Sensing (iMac4s)

作者： V Meera Meera Mary Isaac C Balan Department of Computer Science TocH Institute of Science and Technology Cochin India Resource Centre for Cyber Forensics Centre for Development of Advanced Computing Trivandrum India

Virtual Forensics is a new trend in the area of computer forensics. Virtualization technology paved the way for the growth of virtual forensics. VMware virtual environment provides a completely virtualized set of hardware to the guest operating system. The features of Virtual Machine make it an interesting platform to commit cyber crimes. The combination of innovative criminal techniques and advanced technologies makes the traditional techniques out-dated for detecting such crimes. This paper discusses how live acquisition can be performed to acquire virtual machine related files from the host operating system. The paper also describes how to analyze these acquired files to obtain raw data stored in various grains. The study is supported by methods that assist forensic examiners by providing valuable information from the raw data which is retrieved from various grains pointed by grain table entries.

关键词： Virtual machining Forensics Operating systems Hardware Hard disks computers Virtualization

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Improving high level synthesis optimization opportunity through polyhedral transformations 13

Improving high level synthesis optimization opportunity thro...

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2013 ACM/SIGDA International Symposium on Field Programmable Gate Arrays, FPGA 2013

作者： Zuo, Wei Liang, Yun Li, Peng Rupnow, Kyle Chen, Deming Cong, Jason Center for Energy-Efficient Computing and Applications School of EECS Peking University China University of Illinois Urbana-Champaign IL United States Advanced Digital Science Center Singapore Singapore Computer Science Department University of California Los Angeles CA United States School of Information and Electronics Beijing Institute of Technology China

ISBN: (纸本)9781450318877

High level synthesis (HLS) is an important enabling technology for the adoption of hardware accelerator technologies. It promises the performance and energy efficiency of hardware designs with a lower barrier to entry in design expertise, and shorter design time. State-of-the-art high level synthesis now includes a wide variety of powerful optimizations that implement efficient hardware. These optimizations can implement some of the most important features generally performed in manual designs including parallel hardware units, pipelining of execution both within a hardware unit and between units, and fine-grained data communication. We may generally classify the optimizations as those that optimize hardware implementation within a code block (intra-block) and those that optimize communication and pipelining between code blocks (inter-block). However, both optimizations are in practice difficult to apply. Real-world applications contain data-dependent blocks of code and communicate through complex data access patterns. Existing high level synthesis tools cannot apply these powerful optimizations unless the code is inherently compatible, severely limiting the optimization opportunity. In this paper we present an integrated framework to model and enable both intra- and inter-block optimizations. This integrated technique substantially improves the opportunity to use the powerful HLS optimizations that implement parallelism, pipelining, and fine-grained communication. Our polyhedral model-based technique systematically defines a set of data access patterns, identifies effective data access patterns, and performs the loop transformations to enable the intra- and inter-block optimizations. Our framework automatically explores transformation options, performs code transformations, and inserts the appropriate HLS directives to implement the HLS optimizations. Furthermore, our framework can automatically generate the optimized communication blocks for fine-grained communica

关键词： Field programmable gate arrays (FPGA)

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Genome-wide identification of cancer-related polyadenylated and non-polyadenylated RNAs in human breast and lung cell lines

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science China(Life sciences) 2013年第5期56卷 503-512,1-4页

作者： ZHAO GuoGuang JIAO Fei LIAO Qi LUO HaiTao LI Hui SUN Liang BU DeChao YU KunTao ZHAO Yi CHEN RunSheng Bioinformatic Research Group Key Laboratory of Intelligent Information ProcessingAdvanced Computing Research LaboratoryInstitute of Computing TechnologyChinese Academy of Sciences University of Chinese Academy of Sciences Department of Biochemistry and Molecular Biology Binzhou Medical College Department of Preventive Medicine School of MedicineNingbo University College of Computer Science and Technology Jilin University Bioinformatics Laboratory and National Laboratory of Biomacromolecules Institute of BiophysicsChinese Academy of SciencesBeijing 100101China

Eukaryotic mRNAs consist of two forms of transcripts:poly(A)+ and poly(A),based on the presence or absence of poly(A) tails at the 3 ***(A)+ mRNAs are mainly protein coding mRNAs,whereas the functions of poly(A) mRNA are largely *** studies have shown that a significant proportion of gene transcripts are poly(A) or bimorphic(containing both poly(A)+ and poly(A) transcripts).We compared the expression levels of poly(A) and poly(A)+ RNA mRNAs in normal and cancer cell *** also investigated the potential functions of these RNA transcripts using an integrative workflow to explore poly(A)+ and poly(A) transcriptome sequences between a normal human mammary gland cell line(HMEC) and a breast cancer cell line(MCF-7),as well as between a normal human lung cell line(NHLF) and a lung cancer cell line(A549).The data showed that normal and cancer cell lines differentially express these two forms of *** ontology(GO) annotation analyses hinted at the functions of these two groups of transcripts and grouped the differentially expressed genes according to the form of their *** data showed that cell cycle-,apoptosis-,and cell death-related functions corresponded to most of the differentially expressed genes in these two forms of transcripts,which were also associated with the ***,translational elongation and translation functions were also found for the poly(A) protein-coding genes in cancer cell *** demonstrate that poly(A) transcripts play an important role in cancer development.

关键词： polyadenylation non-polyadenylation function annotation high throughput sequencing cancer bioinformatics

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Application of Hopfield Neural Networks Approach in Solar Energy Product Conceptual Design

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computer Aided Drafting,Design and Manufacturing 2013年第2期23卷 48-52页

作者： XIA Zhi-qiu WANG Ling REN Na WEI Xiao-peng ZHANG Qiang ZHAO Ting-ting Department of Computer Science Collage of EngineeringUniversity of Leicester The archives Dalian University Department of Information Engineering Shenyang Institute of Engineering Key Laboratory of Advanced Design and Intelligent Computing Dalian University Ministry of Education

A new product conceptual design approach is put forward based on Hopfield neural networks models. By research on the mechanisms of Hopfield neural networks, the associative simulation approaches are proposed. The approach is given by Hebb learn- ing law, Hopfield neural networks and crossover and mutation. The calculating models and the calculating formulas for the concep- tual design are put forward. Finally, an example for the conceptual design of a solar energy lamp is given. The better results are ob- tained in the conceptual design.

关键词： Hopfield neural networks conceptual design solar energy

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An Efficient Parallel Solution to the Wigner-Poisson Equations 13

An Efficient Parallel Solution to the Wigner-Poisson Equatio...

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Simulation Multiconference

作者： A. S. Costolanski C. T. Kelley G. W. Howell A. G. Salinger Department of Mathematics North Carolina State University Advanced Computing Office of Information Technology North Carolina State University Computer Science Research Institute Sandia National Laboratories

ISBN: (纸本)9781627480338

A new model for studying the behavior of nanoscale tunneling devices has been developed in C++ using the Wigner-Poisson formulation. This model incorporates the parallel solvers of Sandia National Lab's Trilinos software with the efficient use of parallel data structures to create a code that scales well to a high number of processors. It also incorporates non-uniform meshes to discretize the solution space and higher order numerical methods to reduce simulation run times and increase numerical accuracy. The improvements inherent in the new C++ model will improve the quality of numerical simulations, and allow longer and more complex nanoscale devices to be modeled.

关键词： Resonant tunneling Nanoscale devices Parallel computation Solution space Poisson equation Model Studies Parallel Lines Numerical methods Tunneling devices PROCESSOR Runtime Nanodevice Sandia Codes Equation

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Optimization of polymerase chain reaction on a cyberphysical digital microfluidic biochip 13

Optimization of polymerase chain reaction on a cyberphysical...

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IEEE International Conference on computer-Aided Design

作者： Yan Luo Bhargab B. Bhattacharya Tsung-Yi Ho Krishnendu Chakrabarty Electrical and Computer Engineering Department Duke University Durham NC USA Advanced Computing and Microelectronics Unit Indian Statistical Institute Kolkata India Computer Science and Information Engineering Department National Cheng Kung University Tainan Taiwan

ISBN: (纸本)9781479910694

The amount of DNA strands available in a biological sample is a major limitation for many genomic bioanalyses. To amplify the traces of DNA strands, polymerase chain reaction (PCR) is widely used for conducting subsequent experiments. Compared to conventional instruments and analyzers, the execution of PCR on a digital microfluidic biochip (DMFB) can achieve short time-to-results, low reagent consumption, rapid heating/cooling rates, and high integration of multiple processing modules. However, the PCR biochip design methods in the literature are oblivious to the inherent randomness and complexity of bioanalyses, and they do not consider the interference among on-chip devices and the cost of droplet transportation. We present, for the first time, an integrated design method to optimize the complete PCR procedure, including (i) DNA amplification and termination control, (ii) resource placement that satisfies physical constraints needed to avoid interference, and (iii) droplet transportation needed for mixing and detection. We propose a statistical model for sensor feedback-driven (cyberphysical) on-line decision making in order to optimize and control the execution sequence for DNA amplification. Next, we present a geometric algorithm for layout design to avoid device interference and reduce the cost of droplet routing. Simulation results on three laboratory protocols demonstrate that the proposed design method results in a compact layout and produces an execution sequence for efficient control of PCR operations on a cyberphysical DMFB.

关键词： DNA Reservoirs Heating Layout Transportation Electrodes Algorithm design and analysis

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A novel PSWT-DTW approach for analyzing pseudo-periodic signals

A novel PSWT-DTW approach for analyzing pseudo-periodic sign...

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IEEE Point-of-Care Healthcare Technologies (PHT)

作者： Aniruddha Joshi Sharat Chandran V.K. Jayaraman B.D. Kulkarni Department of Computer Science and Engineering Indian Institute of Technology Bombay Mumbai India Scientific and Engineering Computing Group Centre for Development of Advanced Computing Pune India Chemical Engineering and Process Development Division National chemical Laboratory Pune India

Pseudo-periodic signals are rampant in biomedical applications but are difficult to analyze. One approach is to compute time domain parameters of each individual cycle in the pseudo-periodic signal. The classic approach requires repeated computation in each cycle, which tends to be either error prone, computationally burdensome, or requires manual effort. We provide a novel combination of the pitch synchronous wavelet transform which when combined with dynamic time warping results in effective quantification of cycles in the pseudo-periodic signal. We demonstrate our application of this method in studying the arterial pulse. The results show that our approach is feasible and effective, and confirms further scope in other applications.

关键词： Market research Discrete wavelet transforms Time domain analysis Manuals Physiology

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Cryptanalysis of fair quantum blind signatures

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Chinese Physics B 2012年第3期21卷 63-66页

作者：何立宝黄刘生杨威许瑞 National High Performance Computing Center Department of Computer Science and TechnologyUniversity of Science and Technology of China Suzhou Institute for Advanced Study University of Science and Technology of China

We investigate the fair quantum blind signature scheme proposed by Wang and Wen [Wang T Y and Wen Q Y 2010 Chin. Phys. B 19 060307], which uses the fundamental properties of quantum mechanics and the availability of a trusted arbitrator. However, in this paper, we find that the protocol cannot satisfy the property of non-forgeability even under the condition that the trusted arbitrator is totally credible. Moreover, a simple feasible suggestion for improving the protocol is proposed.

关键词： fair blind signature single photons hash function

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A genealogy of information spreading on microblogs: A Galton-Watson-based explicative model

A genealogy of information spreading on microblogs: A Galton...

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： Dong Wang Hosung Park Gaogang Xie Sue Moon Mohamed-Ali Kaafar Kave Salamatian INRIA France Graduate School of Chinese Academy of Sciences China Institute of Computing Technology Chinese Academy of Sciences China Department of Computer Science Korea Advanced Institute of Science and Technology South Korea LISTIC Laboratory Universite de Savoie France

ISBN: (纸本)9781467359443

In this paper, we study the process of information diffusion in a microblog service developing Galton-Watson with Killing (GWK) model. Microblog services offer a unique approach to online information sharing allowing microblog users to forward messages to others. We describe an information propagation as a discrete GWK process based on Galton-Watson model which models the evolution of family names. Our model explains the interaction between the topology of the social graph and the intrinsic interest of the message. We validate our model on dataset collected from Sina Weibo and Twitter microblog. Sina Weibo is a Chinese microblog web service which reached over 100 million users as for January 2011. Our Sina Weibo dataset contains over 261 thousand tweets which have retweets and 2 million retweets from 500 thousand users. Twitter dataset contains over 1.1 million tweets which have retweets and 3.3 million retweets from 4.3 million users. The results of the validation show that our proposed GWK model fits the information diffusion of microblog service very well in terms of the number of message receivers. We show that our model can be used in generating tweets load and also analyze the relationships between parameters of our model and popularity of the diffused information. To the best of our knowledge, this paper is the first to give a systemic and comprehensive analysis for the information diffusion on microblog services, to be used in tweets-like load generators while still guaranteeing popularity distribution characteristics.

关键词： Twitter Integrated circuit modeling Analytical models Load modeling Predictive models Media

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