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IEEE Education engineering (EDUCON)

作者： Carlos Delgado Kloos Sergio Martín Baltasar Fernández Manjón Gregorio Robles Edmundo Tovar Dep. Telematic Engineering Univ. Carlos III de Madrid Madrid Spain Universidad Nacional de Educacion a Distancia Madrid Madrid ES Universidad Complutense de Madrid Madrid Comunidad de Madrid ES Dep. Telematic Syst. & Computing Univ. Rey Juan Carlos Madrid Spain Dep. Computer Languages and Systems & Software Eng. Univ. Politecnica de Madrid Madrid Spain

Can mobile learning disrupt methods and practices in the educational sector? This is the question we want to answer in this special session. Several examples of mobile educational applications are presented that have ... 详细信息

关键词： Mobile communication Mobile handsets Games Electronic learning Electronic mail Learning systems

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Efficient processing power reservation approach to imporove real-time task schedulability and relaibaility

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International Journal of computer science Issues 2012年第5 5-2期9卷 196-205页

作者： Youssef, Ahmed E. Hamdy, Abeer Ammar, Reda Faculty of Engineering-Helwan Helwan University Cairo Egypt Department of Information Systems King Saud University Riyadh 11543 Saudi Arabia Department of Computers and Systems Electronic Research Institute Faculty of informatics and Computer Science British University Egypt Dep. of Computer Science and Engineering University of Connecticut Storrs CT 06269-3155 United States

Efficient utilization of the computational resources is an urgent demand especially if real time constraints should be guaranteed. Moreover, an acceptable level of reliability should be provided due to the critical nature of some real time applications. This paper proposes a new approach for processing power reservations that efficiently utilizes all the available processing power to improve reliability and schedulability of indep.ndent real time tasks on a uniprocessor. The basic idea of the proposed approach is to use all of the available processing power in the time interval between the arrivals of two successive tasks or when an existing task dep.rts. The advantages of this mechanism are: 1) it reduces the execution time required for each task and hence increases its reliability. 2) At the arrival of a new task;the processing power requirements for the executing tasks to meet their deadlines are smaller, which gives the new arriving tasks higher chances to be accommodated with the existing ones. 3) Efficient processing power utilization may reduce the power consumption in processors with dynamic voltage scaling. An illustration example and simulation experiments showed that our approach provides a more reliable scheduling scheme with higher acceptance rate compared to the traditional approach based on Rialto operating system. © 2012 International Journal of computer science Issues.

关键词： Reliability

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Measurement of motion of carotid bifurcation plaques

Measurement of motion of carotid bifurcation plaques

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IEEE Symposium on Bioinformatics and Bioengineering (BIBE)

作者： Hamed Nasrabadi Marios S. Pattichis Andrew N. Nicolaides Maura Griffin Gregory C. Makris Perry Fisher Efthyvoulos Kyriacou Constantinos S. Pattichis Dept. of Electrical and Computer Engineering The University of New Mexico Albuquerque NM USA Sophie Davis School of Biomedical Education Astoria NY USA Vascular Screening and Diagnostic Centre London U.K. Dep. of Computer Science and Eng Frederick University Limassol Cyprus Dept. of Computer Science University of Cyprus Nicosia Cyprus

Video loops of B-mode ultrasound images of 35 carotid bifurcation plaques were obtained (4 symptomatic and 31 asymptomatic) from patients with carotid bifurcation atherosclerosis. Video loops were classified visually as showing concordant (n=22) or discordant motion (n=13). Concordant plaques were characterized by uniform orientation of motion throughout the cardiac cycle. Discordant plaques exhibited significant spread in motion orientation at different parts of the cardiac cycle, especially at systole. We developed a real-time motion analysis system that applies Farneback's method to estimate velocities between consecutive video frames. For our purposes, we allow a 100msec time interval between the video frames used in the analysis. This approach allows us to analyze significant motions associated with a larger time interval. Over each video frame, we measure the spread of the motion orientation around the dominant orientation. For each video, we look at the spreads of the motion orientations for different motion magnitudes. Using these motion-spread measurements, we can quantify discordant movement. The sum of maximum fan widths for the median pixel motions 5 to 3 (SMFW5to3) had a median value of 100 degrees and interquartile range (IQR) of (80, 110) degrees for the concordant plaques and 270, (230, 430) for the discordant plaques (P

关键词： Ultrasonic imaging Bifurcation Streaming media Atherosclerosis Carotid arteries Histograms Motion measurement

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Eye detection based on skin color analysis with different poses under varying illumination environment

Eye detection based on skin color analysis with different po...

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5th International Conference on Genetic and Evolutionary Computing, ICGEC2011

作者： Huang, Deng-Yuan Lin, Ta-Wei Hu, Wu-Chih Chen, Mu-Song Dep. of Electrical Engineering Dayeh University Changhua Taiwan Dep. of Computer Science and Information Engineering National Penghu University of Science and Technology Penghu Taiwan

ISBN: (纸本)9780769544496

In this paper, we propose a method of eye detection based on skin color analysis under varying illumination. The proposed method consists of several phases, including color conversion, skin color segmentation and face mask calculation, facial feature extraction and eye candidate determination, and detection of human eyes. To eliminate the effect of lighting change on the performance of eye detection, color conversion is first performed. Face mask calculation based on skin color segmentation is then carried out to reduce the possible searching region of human eyes. Eye candidates detected using facial features are used to define the possible human eyes. Human eyes are thus detected by the geometric features of gravity and spatial centers for these eye candidates. Results show that the proposed method works well for faces with different poses and multiple faces under varying illumination. The eye detection time of 21.8 ms is achieved for an image of size 213×320 pixels, indicating computational efficiency of the proposed system. © 2011 IEEE.

关键词： Computational efficiency

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Robust watermarking scheme based on RDWT-SVD: Embedding data in all subbands

Robust watermarking scheme based on RDWT-SVD: Embedding data...

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作者： Lagzian, Samira Soryani, Mohsen Fathy, Mahmood Dep. Computer Engineering Iran University of Science and Technology Tehran Iran

ISBN: (纸本)9781424498345

In this paper, a new method for non-blind image watermarking presented that is robust against affine transformation and ordinary image manipulation. The proposed method presents a watermarking scheme based on redundant discrete wavelet transform (RDWT) and Singular Value Decomposition (SVD). After applying RDWT to cover image, we apply SVD to each subband. Then we modify singular values of the cover image using singular values of the visual watermark. The advantage of the proposed technique is its robustness against most common attacks. Analysis and experimental results show higher performance of the proposed method in comparison to the DWT-SVD method. © 2011 IEEE.

关键词： Singular value decomposition

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Integrated usability model for the multimedia mobile device development

Integrated usability model for the multimedia mobile device ...

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2nd International Conference on Multimedia Technology, ICMT 2011

作者： Tsao, Yung-Chung Tsai, Yin-Te Hsu, Kevin Chihcheng Hsuen, Hsin-Kuang Dep. of Information Management National Central University Taiwan Dep. of Computer Science and Communication Engineering Providence University Taiwan

ISBN: (纸本)9781612847740

The mobile devices have grown rapidly with the progresses of information technology those years. The mobile devices, such as i-Phone, i-Pad, Tablet PC and smart-phone, have become personal and business tools. Those devices are specially developed for mobile users on the basis of the conceptual design of personal digital assistant (PDA) long time ago, but the scopes of the usages extend much more extensive through integrated multimedia needs. This paper proposes a model called integrated usability model (IUM), derived from the technology acceptance model (TAM), to transfer the design criteria into the design guidelines. By using IUM, the developers for multimedia mobile device can use the conceptual indicators like mobile, integration and convenience to reduce the large-scale design factors and evaluate the capability and acceptance for the users. It turns out that the developers can speed up the design processes and avoid the repeated and time-consuming reworks. A mobile multimedia device development for the integrated graphic hand-sketch tablet is presented in this paper. This development uses IUM to reduce the design criteria and then transfer the result criteria into design guidelines. This paper demonstrates the practices of the multi-demand product design as the case validation of IUM. © 2011 IEEE.

关键词： Conceptual design

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Implementation of a new method for stemming in Persian language 11

Implementation of a new method for stemming in Persian langu...

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Proceedings of the International Conference on Web Intelligence, Mining and Semantics

作者： Estahbanati, Asieh Javidan, Reza Dezfooli, Mashalla Abbasi Dep. of Computer Engineering Islamic Azad University Khoosestan Science and Research Branch Iran Dep. of Computer Engineering Islamic Azad University Beyza Branch Fars Iran

ISBN: (纸本)9781450301480

In this paper, a new stemmer algorithm for the Persian language is implemented. It is based on Kazem Taghva algorithm. The evaluation results of the proposed method on the small Farsi document collections are acceptable. But some problems in the morphological based stemmers in Farsi language are found. So some methods are proposed to solve these problems. © 2011 ACM.

关键词： computer programming

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Connecting two trees with optimal routing cost

Connecting two trees with optimal routing cost

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23rd Annual Canadian Conference on Computational Geometry, CCCG 2011

作者： Kao, Mong-Jen Katz, Bastian Krug, Marcus Lee, D.T. Nöllenburg, Martin Rutter, Ignaz Wagner, Dorothea Dep. of Computer Science and Information Engineering National Taiwan University Taiwan Germany

We study the problem of finding the optimal connection between two disconnected vertex-weighted trees. We are given a distance function on the vertices and seek to minimize the routing cost of the tree resulting from adding one single edge between the two trees. The routing cost is defined as the sum of the weighted distances between all pairs of vertices in the induced tree-metric. The problem arises when augmenting and/or repairing communication networks or infrastructure networks. We present an asymptotically optimal quadratic-time algorithm for the general case and show that the problem can be solved more efficiently for the Euclidean metric, when vertices are mapped to points in the plane, as well as for compactly representable graph metrics.

关键词： Forestry

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The density maximization problem in graphs

The density maximization problem in graphs

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Lecture Notes in computer science

作者： Kao, Mong-Jen Katz, Bastian Krug, Marcus Lee, D.T. Rutter, Ignaz Wagner, Dorothea Germany Dep. of Computer Science and Information Engineering National Taiwan University Taiwan

ISBN: (纸本)9783642226847

We consider a framework for bi-objective network construction problems where one objective is to be maximized while the other is to be minimized. Given a host graph G = (V,E) with edge weights we ∈ and edge lengths e ∈ for e ∈ E we define the density of a pattern subgraph H = (V′,E′) ⊆ G as the ρ(H) = ∑eΕE′we/∑eΕE′ e ratio . We consider the problem of computing a maximum density pattern H with weight at least W and and length at most L in a host G. We consider this problem for different classes of hosts and patterns. We show that it is NP-hard even if the host has treewidth 2 and the pattern is a path. However, it can be solved in pseudo-polynomial linear time if the host has bounded treewidth and the pattern is a graph from a given minor-closed family of graphs. Finally, we present an FPTAS for a relaxation of the density maximization problem, in which we are allowed to violate the upper bound on the length at the cost of some penalty. © 2011 Springer-Verlag.

关键词： Graph theory

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The design of video door phone and control system for home secure applications

The design of video door phone and control system for home s...

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2011 5th International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, IMIS 2011

作者： Chang, Ching-Lung Tsai, Han-Yu Dep. of Computer Science and Info. Engineering National Yunlin University of Science and Technology Taiwan

ISBN: (纸本)9780769543727

With the wide acceptance and development of the Internet, it is trend to integrate all of services into Internet. At the same time, the fast development of communication technology that is evolution from narrowband dial-up networks to current broadband networks, from fixed PSTN phone to mobile phone and from wired network to wireless network. In the visible future, the communication will be converged to IP centric networks to come up pervasive/ubiquitous network environments. In this paper, we integrate the SIP protocol, ZigBee networks, video/audio streaming, and remote control to realize a video door phone system and remote home appliance control, to enhance the home secure environment. At the same time, a low-complexity XOR-based FEC packet loss recovery scheme is developed to reduce the packet loss impact and to improve the video playback quality in client side. © 2011 IEEE.

关键词： Remote control

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