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IEEE International Conference on Big Data

作者： Kanji Matsutani Masahito Kumano Masahiro Kimura Kazumi Saito Kouzou Ohara Hiroshi Motoda Department of Electronics and Informatics Ryukoku University Japan School of Administration and Informatics University of Shizuoka Japan Department of Integrated Information Technology Aoyama Gakuin University Japan Institute of Scientific and Industrial Research Osaka University Japan School of Computing and Information Systems University of Tasmania Australia

Acquiring a network of trust relations among users in social media sites, e.g., item-review sites, is important for analyzing users' behavior and efficiently finding reliable information on the Web. We address the problem of predicting trustlinks among users for an item-review site. Non-negative matrix factorization (NMF) methods have recently been shown useful for trust-link prediction in such a site where both link and activity information is available. Here, a user activity in an item-review site means posting a review and giving a rating for an item. In this paper, for better trust-link prediction, we propose a new NMF method that incorporates people's evaluation of users' activities as well as trust-links and users' activities themselves. We further apply it to an analysis of users' behavior. Using two real world item-review sites, we experimentally demonstrate the effectiveness of the proposed method.

关键词： Media Yttrium Social network services Prediction algorithms Big data informatics Reliability

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Cognitive radio ad-hoc networks: Attacks and its impact

Cognitive radio ad-hoc networks: Attacks and its impact

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International Conference on Emerging Trends in Networks and Computer Communications (ETNCC)

作者： B Ramesh Babu Meenakshi Tripathi Manoj Singh Gaur Dinesh Gopalani Dharm Singh Jat Department of Computer Science and Engineering Malaviya National Institute of Technology Jaipur Rajasthan INDIA Department of Computer Science and Engineering Malaviya National Institute of Technology Jaipur Rajasthan India School of Computing and Informatics Polytechnic of Namibia

In the current scenario Cognitive Radio (CR) is the best available solution to overcome spectrum shortage problem. Cognitive Radio Ad Hoc Networks (CRAHNs) is the use of CR technology in the wireless ad-hoc network scenario. The field of CRAHNs is still in this nascent stage therefore not much work has been done related to security issues associated with these types of networks. In order to provide secure data transmission over these networks it is mandatory to make these networks robust and less vulnerable against the various types of attacks. Through this report we have presented an implementation and simulation study of Network Layer Attacks primarily Black Hole Attack and Gray Hole Attack in detail with their impacts on the various network parameters. The Black Hole Attack is a type of Denial of Service(DoS) attack where the node that has turned malicious advertises itself as the most optimal path to reach the destination, thus drawing all the traffic towards itself and later either it drops all the received packets or prevent them from reaching their destinations. The Gray Hole Attack is a variation of black hole attack in which selective forwarding principles are used to selectively drop some data and to forward the rest. In this Project using NS2 with the CRAHN extension as the simulator, effect of these attacks on the various network parameters of CRAHNs have been recorded and compared to present an oversight of how performance is affected whenever the network gets injected with these attacks.

关键词： Ad hoc networks Cognitive radio Routing Throughput Routing protocols Delays

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Training of an Artificial Neural Network with Backpropagation algorithm using notification oriented paradigm

Training of an Artificial Neural Network with Backpropagatio...

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Latin America Congress on Computational Intelligence (LA-CCI)

作者： Fenando Schütz João A. Fabro Carlos R. E. Lima Adriano F. Ronszcka Paulo C. Stadzisz Jean M. Simão Graduate School in Electrical Engineering and Industrial Informatics (CPGEI) Federal University of Technology - Paraná (UTFPR) - Av. Sete de Setembro 3165. Curitiba-PR Brazil. 80-230-901 Graduate School of Applied Computing (PPGCA) Federal University of Technology - Parana (UTFPR) Curitiba PR Brazil Graduate School in Electrical Engineering and Industrial Informatics (CPGEI)

When implementing Artificial Neural Networks with imperative programing languages, the resulting programs are usually highly coupled. This problem usually hampers distribution over multiple processors, especially when the ANN executes on general-purpose processors. An emerging technique called Notification Oriented Paradigm (NOP) facilitates the development of distributed and decoupled systems, and minimizes the amount of processing calculations, while avoiding structural and temporal redundancies in the logical-causal evaluation. These advantages seem to be relevant to parallel systems, especially in the case of ANNs. In this sense, this paper presents the development of a Multi-Layer Perceptron using Backpropagation training algorithm, based on the concepts of NOP in its implementation. The overall performance of NOP implementation was not so good in comparison with the Imperative Paradigm (IP) implementation, because the current materialization of NOP (framework) is still based on a single thread implementation. Even though, this implementation proved to be plausible and decoupled, as well as parallelizable according the inherent parallelism of ANNs, conceptually intrinsic on the NOP.

关键词： Artificial neural networks Training Neurons Computer architecture Hardware Program processors

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Android malware detection based on permission combinations

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International Journal of Simulation and Process Modelling 2015年第4期10卷 315-326页

作者： Liu, Zenghui Lai, Yingxu Chen, Yinong Automation Engineering Institute Beijing Polytechnic Beijing100176 China College of Computer Science Beijing University of Technology Beijing100124 China School of Computing Informatics and Decision Systems Engineering Arizona State University Tempe85287 United States

Considering the resource limitations of mobile terminals, such as memory capacity and battery power, it will take a large portion of resources if the complex malicious detection system is implemented in mobile terminals. We proposed the training part to be implemented on the backend server and the detecting part to be implemented on the mobile terminals. In addition, we apply permission information to the applications installed on the terminals, because permission mechanism controls the applications' accesses to sensitive information. In our method, we first employ apriori algorithm to define the permission combinations to be the initial feature and calculate the threat level of permission based on the relative deviation distances. The distances are then used as weights to the classification algorithm. In the process, we apply an integrated feature selection approach based on the principle of self-learning to extract important features to form the feature set. Finally, the minimum risk Bayes algorithm is introduced to classify unknown applications. The experimental results show that our method is effective on imbalanced datasets. Copyright © 2015 Inderscience Enterprises Ltd.

关键词： Android malware

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Enhancing flexibility in clinical trials using workflow management systems 8

Enhancing flexibility in clinical trials using workflow mana...

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8th Workshop on Transformation and Engineering of Enterprises, TEE 2014 and the 1st International Workshop on Capability-Oriented Business informatics, CoBI 2014 - Co-located with the 16th IEEE International Conference on Business informatics, CBI 2014

作者： Murungi, Albert Nabukenya, Josephine Information Systems Department School of Computing and Informatics Technology Makerere University Kampala Kampala Uganda

In the medical environment, clinical research has been predomi-nantly paper-based. The Case Report Form (CRF) is an example of paper-based tools used in documenting clinical trials. A clinical trial can be understood to be a business process. This also means that automating the clinical trial can be re-ferred to as a workflow process. In this research, we seek to automate the clini-cal trial in order to support the medical practitioners to ably translate their natu-ral language format including CRFs using a workflow system. However we al-so address the need for flexibility in workflow models in the clinical trials that operate under specific guidelines in form of protocols. To attain the required level of flexibility in clinical trial workflow models, we use the constraint-based modeling language. The results from the validation indicate that the designed workflow modeling framework meets the required level of flexibility with re-spect to its usefulness and usability. Copyright © 2014 for the individual papers by the papers' authors.

关键词： Modeling languages

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A new software paradigm for Internet computing

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National Science Review 2014年第2期1卷 168-169页

作者： Gang Huang Xiaoxing Ma Wei-Tek Tsai School of Electronics Engineering and Computer Science Peking University School of Computing Informatics and Decision Systems Engineering Arizona State University Department of Computer Science and Technology Nanjing University

The Internet,once a network of networks,has become not only the platform of choice for delivering services to increasingly mobile users,but also the connective tissue between people,information and *** all new and popular computing and application paradigms were born in the Internet,or at least motivated by it,including Web 2.0,Social Networking,Mobile Internet,Cloud computing,Internet of things,and big *** has played a central part in the evolution of the *** open,dynamic,evolving environment of Internet computing continues to demand new sotware technologies in order to

关键词： In A new software paradigm for Internet computing

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Dynamics of software systems projects during the requirements process improvement

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International Journal of Simulation and Process Modelling 2014年第4期9卷 206-221页

作者： Zawedde, Aminah Williams, Ddembe School of Computing and Informatics Technology Makerere University P.O. Box 7062 Kampala Uganda Faculty of Computing and Information Management KCA University P.O. Box 56808 00200 Nairobi Kenya

Requirements process improvement (RPI) in software systems is aimed at systematically controlling changes of the requirements specification and making improvements that result in high quality specifications at reduced costs and delivered within the specified schedule. RPI activities are dynamic and complex processes managing all changes to the requirements process. Therefore, in order to meet customer and business needs, organisations need to have an effective RPI that will result into quality specifications, within a stipulated budget. This paper explores the dynamics that exists among the factors that influence a successful RPI in order to provide the understanding required to explain how the underpinning process attributes affect the quality and associated costs of the RE specification delivered to the customer. The authors contend that the developed system dynamics based RPI model is a generic decision making framework for an effective approach to RPI. Copyright © 2014 Inderscience Enterprises Ltd.

关键词： Costs

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An Efficient Centralized Algorithm for Connected Dominating Set on Wireless Networks

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Procedia Computer Science 2015年 56卷 162-167页

作者： Deqian Fu Lihua Han Li Liu Qian Gao Zhiquan Feng School of Informatics Linyi University Linyi 276005 P.R. China Provincial Key Laboratory for Network Based Intelligent Computing University of Jinan Jinan 250022 P.R. China School of Information Qilu University of Technology Jinan Shandong 250353 China School of Information Science and Engineering Universityof Jinan Jinan Shandong 250022 China

In wireless network, backbone network plays an important role on forwarding data. Further, in order to reduce the delay and save energy, the minimum connected dominating set (MCDS) is an effective way to construct a backbone. However, it is NP-hard to construct the MCDS. In this paper, we propose an efficient centralized algorithm, redundancy connected dominating set (RCDS), to construct a relatively optimal connected dominating set with the economic computation cost of O (Δ 2 n) Specifically, the local strategy is employed to obtain the maximal independent set (MIS) firstly, and then a virtual backbone network is generated by adding the local joint intermediate nodes in the general graph.

关键词： Redundancy Connected dominating set Backbone network maximal independent set Wireless network General graph

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Jetstream: A self-provisioned, scalable science and engineering cloud environment 15

Jetstream: A self-provisioned, scalable science and engineer...

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4th Annual Conference on Extreme Science and Engineering Discovery Environment, XSEDE 2015

作者： Stewart, Craig A. Hancock, David Stanzioneb, Daniel Turnerd, George Cockerill, Timothy M. Merchant, Nirav Taylor, James Vaughn, Matthew Foster, Ian Skidmore, Edwin Tuecke, Steven Gaffney, Niall I. IU Pervasive Technology Institute and IU School of Informatics and Computing United States Texas Advanced Computing Center University of Texas Austin Road A AustinTX78758 United States Computation Institute University of Chicago 5735 S. Ellis Ave ChicagoIL60637 United States IU Pervasive Technology Institute 2709 E. Tenth Street BloomingtonIN47408-2671 United States University of Arizona 1401 East University Boulevard TucsonAZ85721 United States Department of Biology Johns Hopkins University 3400 N Charles St. BaltimoreMD21218 United States

ISBN: (纸本)9781450337205

Jetstream will be the first production cloud resource supporting general science and engineering research within the XD ecosystem. In this report we describe the motivation for proposing Jetstream, the configuration of the Jetstream system as funded by the NSF, the team that is implementing Jetstream, and the communities we expect to use this new system. Our hope and plan is that Jetstream, which will become available for production use in 2016, will aid thousands of researchers who need modest amounts of computing power interactively. The implementation of Jetstream should increase the size and disciplinary diversity of the US research community that makes use of the resources of the XD ecosystem. Copyright © 2015 ACM.

关键词： Ecosystems

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On Constructing Minimum 2-Connected 2-Domiating Set with Maximum Spectrums in Cognitive Radio Networks

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Procedia Computer Science 2015年 56卷 156-161页

作者： Lihua Han Deqian Fu Zifen Yang Qian Gao Zhiquan Feng School of Informatics Linyi University Linyi Shandong 276005 P.R. China Provincial Key Laboratory for Network Based Intelligent Computing University of Jinan Jinan 250022 P.R. China School of Information Qilu University of Technology Jinan Shandong 250353 China School of Information Science and Engineering Universityof Jinan Jinan Shandong 250022 China

Connected dominating set (CDS) is a representative technique for constructing virtual backbones of wireless networks to improve the efficiency of communication. Most of existing works on CDS aim to construct the minimum CDS (MCDS). However, MCDS may not be sufficient in cognitive radio networks where communication links are prone to failure due to random activities of primary users. To solve the problem, an algorithm is proposed in this paper to construct a CDS with redundancy and the maximum spectrums in CRNs. Moreover, with an integer programming formulation, an algorithm is designed to obtain the minimum 2-conneted 2-dominating set with maximum spectrums (MSs) in CRNs. To the best of our knowledge, this is the first integer programming formulation for the problem and the concept of MSs is put forward first. Simulation results indicate that our algorithm performs well.

关键词： Minimum 2-Connected 2-Domiating Set CDS minimum CDS Maximum Spectrums CRN

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