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ASIS&T annual meeting pre-conference activities: Information behavior on the move: 2013 ASIS&T SIG/USE research symposium

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Bulletin of the Association for Information Science and Technology 2014年第3期40卷

作者： Denise E. Agosto Lorri Mon Rong Tang Associate Professor College of Computing & Informatics Drexel University and editor of the Journal of Research on Libraries & Young Adults Associate Professor and Chair The MS-IT program in the Florida State University College of Communication and Information Associate Professor and Director Simmons Usability Lab in the Graduate School of Library and Information Science Simmons College

EDITOR'S SUMMARY The 13th Annual SIG/USE Research Symposium focused on ways mobile technologies have influenced information needs, seeking and use. In her keynote address, Caroline Haythornthwaite framed movement as changing contributorship, interactions and participation in multiple knowledge communities. A series of Ignite talks on the common theme of mobility followed, with topics ranging from mobile phones as the preferred Internet access device, credibility of mobile applications and online resources and public libraries' use of social media and mobile applications to mobile apps promoting health information literacy and supporting teleworking. Small groups brainstormed on opportunities, challenges and research ideas inspired by the theme. Annual SIG/USE awards recognized scholars for innovative work on topics including refugees' information seeking, factors influencing scholars' data sharing and drawings as visual representations of information. The symposium closed with encouragement to consider how information on the move influences perspectives and research into information behavior.

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A fast EMD-based technique for Power Quality signals decomposition, compression, and time-frequency analysis

A fast EMD-based technique for Power Quality signals decompo...

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International Conference on Digital Signal Processing (DSP)

作者： Leonardo Bandeira Soares Sergio Bampi Cesar David Paredes Crovato Informatics Institute-Microelectronics Graduate Program (PGMicro) Federal University of Rio Grande do Sul Porto Alegre Brazil ICET/PPGE Feevale Univ. São Leopoldo Brazil

In this paper an EMD-based (Empirical Mode Decomposition) technique is proposed in order to improve the data compression and reconstructed signal accuracy trade-off for PQ (Power Quality) signals. We demonstrate that our technique saves computational cost and reduces the mode mixing problem when compared to the EEMD (Ensemble EMD) and traditional EMD, respectively. After simulations with recorded power line test-cases, we compare our results with DWT (Discrete Wavelet Transform), and both traditional and EEMD. Results have shown that our technique outperforms the DWT in both data compression ratio and reconstruction accuracy metrics. Moreover, we analyze the balance between computational costs and mode mixing reduction for the three EMD techniques.

关键词： Discrete wavelet transforms Computational efficiency Accuracy Time-frequency analysis Wavelet analysis Splines (mathematics)

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Transforming creative requirements into conceptual models

Transforming creative requirements into conceptual models

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International Conference on Research Challenges in Information Science, RCIS

作者： Fernando Wanderley Denis Silva da Silveira João Araújo Ana Moreira Department of Informatics-CITI-Faculdade de Ciências Universidade Nova de Lisboa Lisboa Portugal Post-Graduate Program in Administration-PROPAD Universidade Federal de Pernambuco Pernambuco Brazil

ISBN: (纸本)9781467329125

Requirements Engineering involves different stakeholders and their different views of a system. Among these stakeholders, software designers are responsible for modeling the information gathered by domain experts. The communication between these specialists is not always easy, often leading to a semantic gap between what is desired and what is developed. This gap is characterized by inconsistencies between the requirements and the conceptual models produced. This paper tackles this issue by employing model-driven techniques to foster consistency in the conceptual modeling process, and by using a mind map model specification that facilitates communication between experts. Our approach defines a set of transformation rules to generate conceptual models from mind maps.

关键词： Unified modeling language Biological system modeling Software Computational modeling Finite element analysis Business Context

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A lightweight method for wireless sensor network intrusion detections

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ICIC Express Letters 2013年第6期7卷 1793-1798页

作者： Chen, Rung-Ching Hsieh, Chia-Fen Huang, Yung-Fa Department of Information Management College of Informatics Chaoyang University of Technology No. 168 Jifeng E. Rd Wufeng District Taichung 41349 Taiwan Graduate Institute of Informatics Doctoral Program College of Informatics Chaoyang University of Technology No. 168 Jifeng E. Rd Wufeng District Taichung 41349 Taiwan Department of Information and Communication Engineering College of Informatics Chaoyang University of Technology No. 168 Jifeng E. Rd Wufeng District Taichung 41349 Taiwan

Wireless sensor networks can be applied to health care and disaster response, etc. The importance and accuracy of the information requirements of wireless sensors are more stringent. It corresponding to the use of information security should be taken seriously. The detection technology of intrusion detection system (IDS) will affect the lifetime of entire wireless sensor network (WSN). This study combines ontology with intrusion detection system to propose a lightweight ontology intrusion detection system (OWIDS). The system builds the relationship of sensor node in the ontology to detect Sybil attack firstly. The patrol node loads a part of the ontology to detect Sybil attack. Finally, the system uses the isolation table to continue isolation abnormal nodes to avoid duplicate detection energy-consuming. The preliminary experimental result shows that our proposed method can reduce the energy consumption for wireless sensor network intrusion detection, and improve the availability of intrusion detection systems. © 2013 ISSN 1881-803X.

关键词： Ontology

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Nuclear cardiology image enhancement using wavelet transform analysis

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Physica Medica 2014年 30卷 e30-e30页

作者： A. Poulakis S. Angelakis G. Fountos G.S. Panagiotakis I. Asteriadis I. Valais Department of Biomedical Engineering Technological Educational Institute of Athens 12210 Athens Greece Biomedical Informatics and Technology Graduate Program School of Computer Science University of Crete Department of Medical Physics Medical School University of Patras 265 00 Patras Greece Department of Nuclear Medicine General Hospital of Kavala 65 500 Kavala Greece

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Performance analysis of VoIP client with integrated encryption module

Performance analysis of VoIP client with integrated encrypti...

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International Conference on Communications, Signal Processing, and their Applications (ICCSPA)

作者： Abdi Wahab Rizal Broer Bahaweres Mudrik Alaydrus Muhaemin Riyanarto Sarno Graduate Program of Electrical Engineering Department Mercu Buana University Jakarta Indonesia Department of Information Systems STMIK Indonesia Jakarta Indonesia Department of Informatics Engineering Faculty of Information Tech ITS Surabaya Indonesia

The number of VoIP users in Indonesia is very low, although the cost offered by VoIP is smaller than using pulsed phone. One of the reason is security provided by the VoIP service provider is still lacking. VoIP users have not received yet the security service to ensure the security of communications. This study tries to secure communications between VoIP users using encryption module that is integrated with VoIP client Sipdroid running on Android Smartphone. It is possible for VoIP users because VoIP client that can only be accessed by VoIP users. The result obtained after integration with encryption module using three encryption schemes, they are AES, DES, and RC4. Sipdroid able to resist passive attack from tapping information (eavesdropping) during the communication session. And the result of QoS measurements is an increase delay of 0.01 ms and no significant change in the throughput and the packet loss, for throughput generated about 78 kbps, and for the average packet loss is 0.8%. However there is a noise that follows the communication on Sipdroid integrated with the encryption module due to the wave skew from the increase time during the encryption process.

关键词： Encryption Delays Throughput Packet loss Androids

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Study of decision variables for enterprises information security investment

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Journal of Quality 2013年第4期20卷 379-401页

作者： Chanu, Chien-lung Tseng, Shu-Fen Lu, Chih-hung Department of Information Management Yuan Ze University Taiwan Graduate Program of Social Informatics Yuan Ze University Taiwan

The increased in information security issues have caused great amount losses to enterprises and have damaged the reputation of those enterprises. In coping with a variety of information security issues, enterprises are always in a dilemma when they need to make investment decisions for information security infrastructure. Managers need to achieve both goals of risk control and cost effectiveness. The aim of this research is to examine the variables influencing enterprises' information security investment decisions. We collected data from decision makers involved in information technology investment through interviews and questionnaires. Factors affecting enterprises information security investment were classified into internal and external factors such as information security manpower, software, hardware, management, outsourcing, and services. Using regression analysis, variables influencing information security investments were found. External environmental factors have no significant effect on enterprises information security investment. Variables that can predict "information security investment" by the order of beta coefficients are: "the senior executives' attitude toward control of information security," "information security risk index," "the scale of enterprise," and "the degree of enterprises' technology application." Consequently, enterprises need to empower the top management to control information security and risk perception to improve the quality of information security decision making. Decision analysis framework is recommended to tradeoff the information security risk control and cost effectiveness of information security investment.

关键词： Security of data

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A Data Management in a Private Cloud Storage Environment Utilizing High Performance Distributed File Systems

A Data Management in a Private Cloud Storage Environment Uti...

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IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises

作者： Tiago S. Soares M. A. R. Dantas Douglas D. J. de Macedo Michael A. Bauer Informatics and Statistic Department (INE) Federal University of Santa Catarina (UFSC) Post-Graduate Program of Knowledge Engineering and Management Federal University of Santa Catarina (UFSC) Computer Science Department (CSD) University of Western Ontario (UWO)

ISBN: (纸本)9781479904051

The new trend in the process of data-intensive management indicates the importance of a distributed file system for both Internet large scale services and cloud computing environments. I/O latency and application buffering sizes are two of a number of issues that are essential to be analysed on different class of distributed file systems. In this paper, it is presented a research work comparing four different high performance distributed file systems. Those systems were employed to support a medical image server application in a private storage environment. Experimental results highlight the importance of an appropriate distributed file system to provide a differential level of performance considering application specific characteristics.

关键词： Distributed File System DICOM HDF5 Telemedicine

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A Security Model for Distributed Collaborative Environments in the Healthcare

A Security Model for Distributed Collaborative Environments ...

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International Conference on Computational Science and its Applications (ICCSA)

作者： Rafael Viana Lopes Araújo Francisco J.S. e Silva Graduate Program in Electrical Engineering Federal University of Maranhão (UFMA) São Luís MA Brazil Department of Informatics of the Federal University of Maranhão (UFMA) São Luís MA Brazil

Distributed Collaborative Environments provide a common user interface that enables collaborative tasks of geographically dispersed users in a specific context. In such environments, many features can be provided, such as asynchronous and synchronous communication mechanisms, a repository for shared resources, and concurrent (synchronous) edition of content. However, it is clear that there is still a shortage concerning the security support in such environments. This becomes even more severe when the context in which these environments are inserted deals with sensitive data, such as patient data and their medical records. The present work proposes a security model for distributed collaborative environments focusing the support for medical researches.

关键词： Collaboration Context Distributed databases Educational institutions Authentication

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Securing elliptic curve based El-Gamal against Pollard Rho attack using elliptic curve based Diffie-Hellman key exchange

Securing elliptic curve based El-Gamal against Pollard Rho a...

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7th International Conference for Internet Technology and Secured Transactions, ICITST 2012

作者： Zani, Tafta Barmawi, Ari Moesriami Abdurohman, Maman Informatics Study Program Graduate School of Telkom Institute of Technology Bandung Indonesia

ISBN: (纸本)9781908320087

Elliptic Curve based El-Gamal (ECEG) cryptosystem is one of many widely used public key cryptosystems that makes use the elliptic curve discrete logarithm problem (ECDLP). For breaking ECDLP, Pollard Rho is currently the fastest attack. In this study a hybrid of Elliptic Curve based Diffie-Hellman Key Exchange (ECDHKE) and ECEG, is modified as an attempt to make harder for an attacker to reveal ECEG's private key by executing Pollard Rho attack using information from the public key gained by eavesdropping. This study examine the modified ECEG strength increase and the feasibility for implementing the modified ECEG. © 2012 Infonomics Society.

关键词： Geometry

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