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Phosphor: A cloud based DRM scheme with sim card

Phosphor: A cloud based DRM scheme with sim card

引用

12th International Asia Pacific web Conference, APweb 2010

作者： Zou, Peng Wang, Chaokun Liu, Zhang Bao, Dalei School of Software Tsinghua University Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology China Key Laboratory for Information System Security Ministry of Education China Department of Computer Science and Technology Tsinghua University Beijing 100084 China

ISBN: (纸本)9780769540122

As 3G networks provide enhanced capabilities of data transportation, a considerable amount of mobile applications and services, which involve mass of unstructured digital contents, e.g., video and audio, are available. Meanwhile, pirate and illegal distribution of these digital contents are severe issues. Digital Rights Management (DRM) aims at protecting unstructured digital contents from being abused through regulating the usage of digital contents. However, existing mobile DRM schemes more or less suffer from poor compatibility, bad practicality or high cost. Besides, to the best of our knowledge, fewer of these DRM schemes concern efficient unstructured data management in the DRM backend (servers and systems) based on Cloud Computing. In this paper, we propose Phosphor, a cloud based mobile DRM scheme with sim card. In details, an unstructured data management system is adopted for efficient data management services in DRM backend . Meanwhile, sim card is introduced to Phosphor, which not only reduces the cost, but also provides higher *** have implemented our DRM scheme, which demonstrates that Phosphor is efficient, secure and practicable. © 2010 IEEE.

关键词： Phosphors

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Recognition of walking intention using multiple bio/kinesthetic sensors for lower limb exoskeletons

Recognition of walking intention using multiple bio/kinesthe...

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作者： Jang, Eun-Hye Cho, Young-Jo Chi, Su-Young Lee, Jae-Yeon Kang, Sang Seung Chun, Byung-Tae Robot/Cognition System Research Department IT Convergence Technology Research Laboratory Electronics and Telecommunications Research Institute Daejeon Korea Republic of Department of Web Information Engineering Hankyong National University Ansung Korea Republic of

ISBN: (纸本)9781424474530

In order to assist the lower limb disabled people to walk, walking-support exoskeletons with bio/kinesthetic sensors such as EMG (Electromyography), gyroscope, and FSR (Force Sensing Resistor) have been developed. It is important to implicitly recognize the walking intention and control the walking-support mechanism. The objective of this work is to examine the walking intention while a person is walking with Lofstrand crutches by analyzing multiple bio/kinesthetic sensor signals. We developed watch/glove and shoe-insoles sensor modules using FSR sensors to recognize the user's walking states as well as intention to walk. The FSR signals measuring force at the palm and Gyro sensor signals reflecting the pose of the upper limb were used as clues for recognizing walking intention. While seventeen normal subjects walked for five gate cycles based on the triped walking (i.e., placing crutches in forward and then moving one step ) with crutches, the FSR and Gyro signals were acquired from their palms and area of vertebrae lumbales. The result showed that the combination of FSR and Gyro signals could recognize user's implicit intention to walk - start walking, keep walking, and stop walking. ©ICROS.

关键词： Electromyography

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Online information sharing issues in website personalization

Online information sharing issues in website personalization

引用

1st International Conference on User Science and Engineering 2010, iUSEr 2010

作者： Razali, Mohd Norhisham Fun, Tan Soo Razak, Fariza Hanis Abdul Hanapi, Rozita Software Engineering School of Engineering and Information Technology University Malaysia Sabah Malaysia Network and System Management School of Engineering and Information Technology University Malaysia Sabah Malaysia Department of System Science Faculty of Computer and Mathematical Sciences University Teknologi MARA Shah Alam Selangor Malaysia Office System Management Faculty of Office Management and Technology Universiti Teknologi MARA Puncak Alam Selangor Malaysia

ISBN: (纸本)9781424490493

website Personalization is one of strategic technique in delivering services in online applications. A part of process for building personalization applications is to collect particular information from the user which involves information sharing. However, the awareness about privacy concerns and security threats have caused to non-sharing behavior among the Internet Users. This situation have caused website personalization cannot be built to serve its purposes. This paper aims to investigate the people's behavior and to study the propensity of information sharing attitude in two different environments and cultures. The two environments are between real-life and online while the two cultures are between Malaysian and non-Malaysian. Since this is an exploratory study, interview with five (5) persons have been conducted. The qualitative technique that chooses was recommended for any exploratory study. The findings of this study explained the understanding of behaviors and the factors of information Sharing. The factors are the cultural factors, the platform of sharing and the behavior of information sharing in web personalization. The sharing behavior in two environments and cultures were also compared. The data collected from the interviews have generalizing the speculations and issues in information sharing which have been discussed at the end section of this paper. ©2010 IEEE.

关键词： websites

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A face-based shape matching method for IGES surface model

A face-based shape matching method for IGES surface model

引用

International Conference on Shape Modeling and Applications - Shape Modeling International Conference, SMI 2010

作者： Hu, Kai-Mo Wang, Bin Gao, Yi Yuan, Qi-Ming Yong, Jun-Hai School of Software Tsinghua University Beijing 100084 China Department of Computer Science and Technology Tsinghua University Beijing 100084 China Key Laboratory for Information System Security Ministry of Education Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China

ISBN: (纸本)9780769540726

IGES is a widely used standard for mechanical data exchange. In this paper, we present a new method for the retrieval task of IGES surface model. Based on this method, a novel distinctive face selection strategy is proposed and evaluated. In the training database, each model is treated as a set of disordered faces, and their features are extracted and stored respectively. The Discounted Cumulative Gain (DCG) value of each face is then calculated and stored for later utilization. To retrieve models in the testing database, we first forecast each face's DCG value by searching its most similar face's DCG value in training database, and then the top k faces with highest forecasted DCGs are selected as query input. A greedy algorithm is finally applied to get the total similarity. Experimental results show that our algorithm is superior or at least comparable to some of the most powerful methods in finding parts with similar functionality in most cases. © 2010 IEEE.

关键词： Electronic data interchange

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Robustify a job-shop schedule according to the payload of the machine

Robustify a job-shop schedule according to the payload of th...

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7th International Conference on Service systems and Service Management, ICSSSM'10

作者： You, Zhiyang Sun, Zhigang Zhao, Xibin Zang, Daxin Department of Computer Science and Technology Tsinghua University Beijing 100084 China School of Software Tsinghua University Beijing China Key Laboratory of Information System Security Ministry of Education School of Software Tsinghua University Beijing 100084 China Software Engineering Institute Beijing University of Aeronautics and Astronautics Beijing 100084 China

ISBN: (纸本)9781424464876

Robust scheduling is an effective way to solve job-shop scheduling problem (JSP) under a dynamic and stochastic environment with uncertainties, which may lead to numerous schedule disruptions. Maintaining the optimization obtained, the robust schedule is more stable in execution. The vast majority of the researches on robust scheduling concentrate on the development of the robustness and stabilization with an optimization target that minimizes makespan. However, other optimization targets are needed in reality, and in this paper, we introduce another optimization target that maximizes the payload of the machine, which can reflect the capacity of machine. This work applies a two-step way to achieve a robust schedule. A baseline schedule in the deterministic environment is generated first, which pursues standard optimization criterions, and then the temporal buffers are inserted into the baseline schedule which make the schedule absorb some level of unexpected disruption without rescheduling. According to the payload of each machine which should be close to the maximum at any time in execution, we can get each size of the temporal buffers inserted into the different operations. An extensive experiment is used to show the relative performance of the proposed robust schedule. It is shown that the schedule is robust and stable under the stochastic disturbance coupling with minimal makespan tardiness and symmetry payload. ©2010 IEEE.

关键词： Stochastic systems

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Reconstructing 3D objects from 2D sectional views of engineering drawings using volume-based method

Reconstructing 3D objects from 2D sectional views of enginee...

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International Conference on Shape Modeling and Applications - Shape Modeling International Conference, SMI 2010

作者： Wen, Yamei Zhang, Hui Yu, Zhongmian Sun, Jiaguang Paul, Jean-Claude School of Software Tsinghua University Beijing 100084 China Department of Computer Science and Technology Tsinghua University Beijing 100084 China Key Laboratory for Information System Security Ministry of Education Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China INRIA France

ISBN: (纸本)9780769540726

Sectional views are widely used in engineering practice due to their clear and concise expression. However, it is difficult for computers to understand because of the large numbers of omitted entities and their diversified representations. This paper aims at reconstructing 3D models from 2D sectional views by improving the traditional volume based method. First, we present a two-stage loop searching algorithm to extract desired loops from sectional views. Then, sub-objects are identified by the hint-based feature identification algorithm with an intuitive loop-matching criterion. After that, a model-directed algorithm is proposed to guide the generation of sub-objects which are assembled together to form the final objects. The algorithm can handle full sections, partial sections and offset sections, as well as orthographic views. Multiple sectional views are supported in our algorithm. Moreover, the domain of objects is extended to inclined quadric surfaces and intersecting quadric surfaces with higher order curves. Experiment results show its practicability. © 2010 IEEE.

关键词： Three dimensional computer graphics

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The transition between sharp and rounded features and the manipulation of incompatible boundary in filling n sided holes

The transition between sharp and rounded features and the ma...

引用

International Conference on Shape Modeling and Applications - Shape Modeling International Conference, SMI 2010

作者： Shi, Kan-Le Yong, Jun-Hai Liu, Peng Sun, Jia-Guang Paul, Jean-Claude School of Software Tsinghua University Beijing 100084 China Department of Computer Science and Technology Tsinghua University Beijing 100084 China Key Laboratory for Information System Security Ministry of Education of China Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China INRIA France

ISBN: (纸本)9780769540726

N -sided hole filling plays an important role in vertex blending. Piegl and Tiller presented an algorithm to interpolate the given boundary and cross-boundary derivatives in B-spline form. To deal with the incompatible cases that their algorithm cannot handle, we propose an extension method to manipulate the transition between sharp and rounded features. The algorithm first patches n crescent-shaped extended surfaces to the boundary with G 2 continuity to handle incompatibility problem in the corners. Then, we compute the inner curves and the corresponding cross-boundary derivatives fulfilling tangent and twist compatibilities. The generated B-spline Coons patches are G1-continuously connected exactly, and have ∈-G 1 continuity with the extended surfaces. Our method improves the continuity-quality of the shape and reduces the count of the inserted knots. It can be applied to all G0- continuous boundary conditions without any restrictions imposed on the boundary or cross-boundary derivatives. It generates better shapes than some popular industrial modeling systems on these incompatible occasions. Some examples underline its feasibility. © 2010 IEEE.

关键词： Interpolation

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Compositional abstraction refinement for timed systems

Compositional abstraction refinement for timed systems

引用

2010 4th International Symposium on Theoretical Aspects of software Engineering, TASE 2010

作者： He, Fei Zhu, He Hung, William N. N. Song, Xiaoyu Gu, Ming School of Software Tsinghua University Beijing China Tsinghua National Laboratory for Information Science and Technology China Key Laboratory for Information System Security MOE China Synopsys Inc. Mountain View CA United States Department of ECE Portland State University Portland OR United States

ISBN: (纸本)9780769541488

Model checking suffers from the state explosion problem. Compositional abstraction and abstraction refinement have been investigated in many areas to address this problem. This paper considers the compositional model checking for timed systems. We present an automated approach which combines compositional abstraction and counter-example guided abstraction refinement (CEGAR). The proposed approach exploits the semantics of a timed automaton to procure its over-approximative abstraction. Any safety property which holds on the abstraction is guaranteed to hold on the concrete model. In the case of a spurious counter-example, our proposed approach refines and strengthens the abstraction in a component-wise method. We implemented our method with the model checking tool Uppaal. Experimental results show promising improvements. © 2010 IEEE .

关键词： Model checking

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E-cost estimation using expert judgment and COCOMO II

E-cost estimation using expert judgment and COCOMO II

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2010 International Symposium on information technology, ITSim'10

作者： Mansor, Zulkefli Bin Kasirun, Zarinah Mohd Arshad, Noor Habibah Hj Yahya, Saadiah Department of Computer Science Faculty of Industrial Information Technology Universiti Industri Selangor Selangor Malaysia Department of Software Engineering Faculty of Computer Science and Information Technology Universiti Malaya Kuala Lumpur Malaysia System Science Studies Faculty of Computer Science and Mathematics Universiti Teknologi Mara Selangor Malaysia Computer Technology and Networking Studies Faculty of Computer Science and Mathematics Universiti Teknologi Mara Selangor Malaysia

ISBN: (纸本)9781424467181

The accuracy and efficiency of cost estimation methodology for web-based application is very important for software development as it would be able to assist the management team to estimate the cost. Furthermore, it will ensure that the development of cost is within the planned budget and provides a fundamental motivation towards the development of web-based application proíéct. The literature review reveals that COCOMO II provides accurate result because more variables are considered including reuse parameter. The parameter is one of the essential variables in estimating the cost in web-based application development. This research investigates the feasibility to combine and implement COCOMO II and el pert I Udgment technil be in a tool called webCost. In estimating a cost, the tool considers all variables in COCOMO II and rei bires el pert l udgment to key-in the input of the variables such as pro I éct size, pro I éct type, cost ad i Ustment factor and cost driven factor. I leveloped in JA I A, webCost is proven able to estimate cost and generate its estimation result. The usability evaluation conducted had shown that webCost is usable when compared with other tools I lit has its own advantages. webCost is evidence suitable for everyone especially the prolect managers, software practitioners or software engineering student in handling the cost estimation tasks. © 2010 IEEE.

关键词： software design

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Availability based trust model of clusters for MANET

Availability based trust model of clusters for MANET

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7th International Conference on Service systems and Service Management, ICSSSM'10

作者： Zhao, Xibin You, Zhiyang Zhao, Zhifeng Chen, Danning Peng, Feng Key Laboratory for Information System Security of Ministry of Education School of Software Tsinghua University 100084 China Department of Computer Science and Technology Tsinghua University 100084 China Department of Computer Science Zhenjiang Watercraft College 212003 China School of Software Tsinghua University 100084 China China Minzu Securities Co. Ltd. 100096 China

ISBN: (纸本)9781424464876

MANET (Mobile ad hoc network) is vulnerable to security attack due to its characteristics such as open network environment, lack of centralized control, dynamic topology, and so on, while traditional security mechanisms cannot meet the security requirements of MANET due to the limited communication bandwidth, computation power, memory and battery capacity, and dynamic deployment environment. Many approaches have been suggested to trade-off between the security strength and efficiency, and most of them focus on the confidentiality and integrity of MANET while pay less attention to the availability issue. Based on the analysis of availability related factors in MANET, we present an availability based trust model in this paper. Furthermore, a cluster based trust model (ABTMC, Availability Based Trust Model of Clusters) is presented with the consideration with the resource constrain of node, dynamic topology, and the unbalance of computing capability and resource capability among MANET nodes. Many availability oriented security service can be obtained based on this model. ©2010 IEEE.

关键词： Availability

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