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CapaCon: Access control mechanism for inter-device communications through TCP connections 10

CapaCon: Access control mechanism for inter-device communica...

引用

25th Annual ACM Symposium on Applied Computing, SAC 2010

作者： Mabuchi, Mitsuhiro Shinjo, Yasushi Hasebe, Koji Sato, Akira Kato, Kazuhiko Dept. of Computer Science University of Tsukuba Tsukuba Ibaraki Japan Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki Japan

ISBN: (纸本)9781605586380

We present CapaCon, an access control mechanism for interdevice communications through TCP connections. CapaCon provides capability-based access control for a system composed of devices. Using CapaCon, an administrator does not need to set access control policies for each device and can manage these policies outside the system. A capability consists of an object device identifier and the list of permitted operations for that object device. Subject devices that maintain capabilities can access object devices corresponding with those capabilities. To protect a capability from being fabricated, CapaCon uses a digital signature. CapaCon can be used without modifying existing device programs. We analyzed the safety of capabilities in CapaCon, and measured network throughputs and processing times of CapaCon. These experimental results show the practicality of CapaCon. © 2010 ACM.

关键词： Access control

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Semi unsupervised M-FISH chromosome image classification

Semi unsupervised M-FISH chromosome image classification

引用

10th International Conference on information Technology and Applications in Biomedicine: Emerging Technologies for Patient Specific Healthcare, ITAB 2010

作者： Karvelis, Petros Likas, Aristidis Fotiadis, Dimitrios I. Dept. of Computer Science University of Ioannina Ioannina GR 45110 Greece Unit of Medical Technology and Intelligent Information Systems Dept. of Materials Science and Engineering University of Ioannina Ioannina GR 45110 Greece

ISBN: (纸本)9781424465606

M-FISH (Multiplex Fluorescent In Situ Hybridization) is a multichannel chromosome imaging technique that allows the color discrimination of human chromosomes. Although M-FISH facilitates the visual detection of chromosome rearrangements, the success of this technique largely depends on the accuracy of the pixel-by-pixel classification. In this study, we present a semi unsupervised method for M-FISH chromosome image classification. First, we segment the chromosome pixels using an automated thresholding procedure. Five features for each pixel are extracted, describing the intensity of the five channels. These features are then normalized. Second, we employed the K-means algorithm in order to cluster the chromosome pixels into the 24 chromosome classes. We have used the emission information for each chromosome class in order to initialize the cluster centers. Our method has been tested on the ADIR M-FISH database and an overall accuracy of 72.48% is achieved. This is comparable to supervised pixel-by-pixel classification methods that use training set to build the classifiers, while our method does not use a training set. © 2010 IEEE.

关键词： Chromosomes

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Implementing a mobile campus using MLE moodle

Implementing a mobile campus using MLE moodle

引用

5th International Conference on P2P, Parallel, Grid, Cloud and Internet Computing, 3PGCIC 2010

作者： Xhafa, Fatos Caballe, Santi Rustarazo, Isaac Barolli, Leonard Dept. of Languages and Informatics Systems Technical University of Catalonia Spain Dept. of Computer Science Multimedia and Telecommunication Open University of Catalonia Spain Dept. of Information and Communication Engineering Fukuoka Institute of Technology Japan

ISBN: (纸本)9780769542379

Mobile learning is considered the next step of online learning by incorporating mobility as a key requirement. Indeed, the current wide spread of mobile devices and wireless technologies brings an enormous potential to e-learning, in terms of ubiquity, pervasiveness, personalization, flexibility, and so on. For this reason, Mobile Learning is attracting significant research efforts covering a fairly variety of learning settings, from schools and universities to workplaces and cities. This research has evidenced that mobile technology can offer new opportunities for learners to learn inside and beyond the traditional instructor-oriented educational paradigm. However, mobile technologies are still in its infancy and many challenges arise. In this paper we analyze, from both learning and technological perspectives, the development of learning applications using mobile devices. To this end, proxy and proxy less architectures are considered as way to extend traditional virtual campuses with mobile clients. The objective is twofold: to access learning materials and to support learning activities. A prototype of a Virtual Campus is developed using MLE-Moodle -the Mobile Learning module of Moodle. The proposed Virtual Campus enables mobile clients to perform online learning activities and is a step towards achieving the 'anytime, anywhere' paradigm. © 2010 IEEE.

关键词： E-learning

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Fine-grained data access control systems with user accountability in cloud computing

Fine-grained data access control systems with user accountab...

引用

2nd IEEE International Conference on Cloud Computing Technology and science, CloudCom 2010

作者： Li, Jin Zhao, Gansen Chen, Xiaofeng Xie, Dongqing Rong, Chunming Li, Wenjun Tang, Lianzhang Tang, Yong School of Computer Science and Educational Software Guangzhou University China School of Computer Science South China Normal University China Key Laboratory of Computer Networks and Information Security Xidian University China Dept. of Electrical Engineering and Computer Science Stavenger University Norway School of Software Sun Yat-sen University China

ISBN: (纸本)9780769543024

Cloud computing is an emerging computing paradigm in which IT resources and capacities are provided as services over the Internet. Promising as it is, this paradigm also brings forth new challenges for data security and access control when users outsource sensitive data for sharing on cloud servers, which are likely outside of the same trust domain of data owners. To maintain the confidentiality of sensitive user data against untrusted servers, existing work usually apply cryptographic methods by disclosing data decryption keys only to authorized users. However, in doing so, these solutions inevitably introduce heavy computation overhead on the data owner for key distribution and data management when fine-grained data access control is desired, and thus do not scale well. In this paper, we present a way to implement scalable and fine-grained access control systems based on attribute-based encryption (ABE). For the purpose of secure access control in cloud computing, the prevention of illegal key sharing among colluding users is missing from the existing access control systems based on ABE. This paper addresses this challenging open issue by defining and enforcing access policies based on data attributes and implementing user accountability by using traitor tracing. Furthermore, both the user grant and revocation are efficiently supported by using the broadcast encryption technique. Extensive analysis shows that the proposed scheme is highly efficient and provably secure under existing security models. © 2010 IEEE.

关键词： Access control

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Assessor error in stratified evaluation 10

Assessor error in stratified evaluation

引用

Proceedings of the 19th ACM international conference on information and knowledge management

作者： Webber, William Oard, Douglas W. Scholer, Falk Hedin, Bruce Dept. of Computer Science and Software Engineering University of Melbourne Australia College of Information Studies UMIACS University of Maryland United States School of Computer Science and Information Technology RMIT University Australia H5 San Francisco United States

ISBN: (纸本)9781450300995

Several important information retrieval tasks, including those in medicine, law, and patent review, have an authoritative standard of relevance, and are concerned about retrieval completeness. During the evaluation of retrieval effectiveness in these domains, assessors make errors in applying the standard of relevance, and the impact of these errors, particularly on estimates of recall, is of crucial concern. Using data from the interactive task of the TREC Legal Track, this paper investigates how reliably the yield of relevant documents can be estimated from sampled assessments in the presence of assessor error, particularly where sampling is stratified based upon the results of participating retrieval systems. We show that assessor error is in general a greater source of inaccuracy than sampling error. A process of appeal and adjudication, such as used in the interactive task, is found to be effective at locating many assessment errors;but the process is expensive if complete, and biased if incomplete. An unbiased double-sampling method for resolving assessment error is proposed, and shown on representative data to be more efficient and accurate than appeal-based adjudication. © 2010 ACM.

关键词： Errors

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Combined admission, power and rate control for cognitive radios in dynamic spectrum access ad-hoc networks

Combined admission, power and rate control for cognitive rad...

引用

International Conference on Network-Based information systems

作者： Rawat, Danda B. Bista, Bhed Bahadur Yan, Gongjun Dept. of Electrical and Computer Engineering Old Dominion University Norfolk VA 23529 United States Faculty of Software and Information Science Iwate Prefectural University 020-0193 Japan Dept. of Computer Science Old Dominion University Norfolk VA 23529 United States

ISBN: (纸本)9780769541679

Dynamic spectrum access in cognitive radio (CR) networks is emerging concept to utilize the scarce spectrum in an efficient manner. CR systems will operate in heterogeneous networks in which efficient use of resources will require control of both transmission rate and power for active CRs. In this paper we propose an algorithm for resource allocation in dynamic spectrum access ad-hoc networks where active CR links satisfy their own quality-of-service (QoS) requirements as well as the interference constraints to respect the incumbent primary user- transmissions. We formulate the problem of joint transmission rate and power control for active CR links to maximize their surplus (or net utility) functions using distributed interference compensation as a non-cooperative game. We illustrate the proposed approach with numerical results obtained from sim- ulations. © 2010 IEEE.

关键词： Cognitive radio

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Analysis of integrity vulnerabilities and a non-repudiation protocol for cloud data storage platforms

Analysis of integrity vulnerabilities and a non-repudiation ...

引用

International Workshop on Scheduling and Resource Management for Parallel and Distributed systems

作者： Feng, Jun Chen, Yu Ku, Wei-Shinn Liu, Pu Dept. of Electrical and Computer Engineering SUNY - Binghamton Binghamton NY 13902 United States Dept. of Computer Science and Software Engineering Auburn University Auburn AL 36849 United States Systems and Technology Group IBM Endicott Endicott NY 13760 United States

ISBN: (纸本)9780769541570

Data storage technologies have been recognized as one of the major dimensions of information management along with the network infrastructure and applications. The prosperity of cloud computing requires the migration from server-attached storage to network-based distributed storage. Along with variant advantages, distributed storage also poses new challenges in creating a secure and reliable data storage and access facility. The data security in cloud is one of the challenges to be addressed before the novel pay-as-you-go business model can be accepted and applied widely. Concerns are raised from both insecure/unreliable service providers and potential malicious users. In this article, we analyze the integrity vulnerability existing in the current cloud storage platforms and show the problem of repudiation. A novel non-repudiation (NR) protocol specifically designed in the context of cloud computing environment is proposed. We have also discussed the robustness of the NR protocol against typical attacks in the network environments. © 2010 IEEE.

关键词： Cloud storage

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An agent-based cooperative communication method in wireless sensor network for port logistics

An agent-based cooperative communication method in wireless ...

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2010 13th International Conference on computer and information Technology, ICCIT 2010

作者： Gou, Haosong Uddin, Md. Kafil Hossen, Muhammad Kamal Department of Computer Engineering Pusan National University Busan 609-735 Korea Republic of College of Computer Science and Information Systems Najran University Najran-1988 Saudi Arabia Dept. of Computer Science and Engineering Chittagong Univ. of Engineering and Technology Chittagong-4349 Bangladesh

ISBN: (纸本)9781424484973

Cooperative communication has been considered as a promising method for benefiting the advantages from MIMO (multiple-input multiple-output) system for single antenna mobiles in the wireless network, and many important milestones in this area have been achieved, leading to a flurry of research activity. Especially, cooperative communication in wireless sensor networks (WSNs) has gained so much interest due to the limitations of WSNs. This paper proposes a new cooperative communication method for WSNs in port logistics according to the observation of real application in port. In our proposed method, we use some fixed agents to help the sensor nodes to gain more efficient communication in the network. The simulation results and analysis show that our method achieves a good performance in enhancing the transmission and energy efficiency, resulting in improvement of the communication performance of the whole network. ©2010 IEEE.

关键词： Cooperative communication

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Tracking and retrieval of pen tip positions for an intelligent camera pen

Tracking and retrieval of pen tip positions for an intellige...

引用

International Conference on Frontiers in Handwriting Recognition

作者： Iwata, Kazumasa Kise, Koichi Iwamura, Masakazu Uchida, Seiichi Omachi, Shinichiro Dept. of Computer and Systems Sciences Graduate School of Engineering Osaka Prefecture University Japan Faculty of Information Science and Electrical Engineering Kyushu University Japan Graduate School of Engineering Tohoku University Japan

ISBN: (纸本)9780769542218

This paper presents a method of recovering digital ink for an intelligent camera pen, which is characterized by the functions that (1) it works on ordinary paper and (2) if an electronic document is printed on the paper the recovered digital ink is associated with the document. Two technologies called paper fingerprint and document image retrieval are integrated for realizing the above functions. The key of the integration is the introduction of image mosaicing and fast retrieval of previously seen fingerprints based on hashing of SURF local features. From the experimental results of 50 handwritings, we have confirmed that the proposed method is effective to recover and locate the digital ink from the handwriting on a physical paper. © 2010 IEEE.

关键词： Recovery

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Fast 3D image dept. map estimation using wavelet analysis

Fast 3D image depth map estimation using wavelet analysis

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2010 International Conference on Audio, Language and Image Processing, ICALIP 2010

作者： Lin, Yu-Hong Chiang, Te-Wei Tsai, Tienwei Hsiao, Mann-Jung Dept. of Multimedia Design Chihlee Institute of Technology Taiwan Dept. of Accounting Information Systems Chihlee Institute of Technology Taiwan Dept. of Information Management Chihlee Institute of Technology Taiwan Dept. of Computer Science and Engineering Tatung University Taiwan Kang-Ning Junior College of Medical Care and Management Taiwan

ISBN: (纸本)9781424458653

This paper is to propose a method for dept. estimation in a 2D image using wavelet analysis. According to our observations, the high frequency components represent focused objects in images of limited dept. of field (DOF) and their high frequency wavelet subbands contain high energy. In our approach, each image is first transformed to YUV domain and the Y component is extracted for further analysis. Afterwards, the high frequency bands are derived with wavelet analysis. Through two stages of smoothing and scale manipulation, the dept. map data with less error can be used for some 3D display. The experimental result shows that the proposed approach is effective and efficient for dept. map estimation. ©2010 IEEE.

关键词： Wavelet analysis

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