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检索条件"机构=Dept. of Information Technologies and Systems. Computer Science and Engineering"

共 947 条记录，以下是541-550 订阅

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A proof-of-concept study for predicting the region of atherosclerotic plaque development based on plaque growth modeling in carotid arteries

A proof-of-concept study for predicting the region of athero...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Antonis I. Sakellarios Paschalis Bizopoulos Kostas Stefanou Lambros S. Athanasiou Michail I. Papafaklis Christos V. Bourantas Katerina K. Naka Lampros K. Michalis Dimitrios I. Fotiadis the Unit of Medical Technology and Intelligent Information Systems Dept. of Materials Science and Engineering University of Ioannina GR 45110 the Biomedical Engineering Laboratory School of Electrical and Computer Engineering National Technical University of Athens (NTUA) GR-157 73 Zografou Athens Greece the Institute of Molecular Biology and Biotechnology Dept. of Biomedical Research FORTH GR45110 Ioannina Greece the Michaelideion Cardiac Center Dept. of Cardiology in Medical School University of Ioannina GR 45110 Ioannina Greece the Dept. of Interventional Cardiology Erasmus MC Thoraxcenter Rotterdam The Netherlands the Biomedical Research Institute - FORTH University Campus of Ioannina 45110 Ioannina Greece

ISBN: (纸本)9781424492695

In this work, we present a computational model for plaque growth utilizing magnetic resonance data of a patient's carotid artery. More specifically, we model blood flow utilizing the Navier-Stokes equations, as well as LDL and HDL transport using the convection-diffusion equation in the arterial lumen. The accumulated LDL in the arterial wall is oxidized considering the protective effect of HDL. Macrophages recruitment and foam cells formation are the final step of the proposed multi-level modeling approach of the plaque growth. The simulated results of our model are compared with the follow-up MRI findings in 12 months regarding the change to the arterial wall thickness. WSS and LDL may indicate potential regions of plaque growth (R~2=0.35), but the contribution of foam cells formation, macrophages and oxidized LDL increased the prediction significantly (R~2=0.75).

关键词： LDL HDL MRI Low-Density Lipoproteins Hardware design languages High-density lipoproteins Carotid Arteries atherosclerotic plaque convection-diffusion equation Foam Cells C7orf49 gene Magnetic Resonance Imaging oxidized low density lipoprotein Blood Flow Blood Circulation Arteriosclerosis Computational modeling

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Path Metrics for Lower Throughput Fluctuation for Video Streaming Service in Wireless Mesh Networks

Path Metrics for Lower Throughput Fluctuation for Video Stre...

引用

Asia-Pacific Conference on Communications

作者： Hiromu Asahina Hisao Yamamoto Kentaroh Toyoda Iwao Sasase Dept. of Information and Computer Science Keio University 3-14-1 Hiyoshi Kohoku Yokohama 223-8522 Japan Dept. of Systems Information Engineering Tokyo City University 1-28-1 Tamadutsumi Setagaya Tokyo 158-8557 Japan

ISBN: (纸本)9781467366533

The video streaming service over Wireless Mesh Networks (WMNs) is an attractive feature for live streaming and video conversation when disaster occurs. The path construction with the conventional metrics e.g., throughput, latency, or packet loss rate, suffers from the repeated waiting time due to the CSMA/CA since paths are concentrated on nodes with good metric. As a consequence, it brings about throughput fluctuation of video streaming service. We propose two metrics that reflect on the magnitude of CSMA/CA interference around a node in order to select a path that the throughput of video streaming session will get stable. The first metric is calculated from the number of received Request To Send (RTS)/Clear To Send (CTS) frames. Since the number of RTS/CTS reflects on the frequency of the packet transmission around a node, a source node can chooses a path which does not make a node waiting for constant time due to the CSMA/CA on the existing path that might use streaming service. The second metric uses the number of neighbor nodes and we set the larger metric value as more nodes exist. The idea comes from the fact that a node which has few neighbor nodes does not much interfere other established paths. The proposed metrics can be easily installed into Hybrid Wireless Mesh Protocol (HWMP) which is a de facto standard path selection protocol defined in IEEE802.11s. We show that the proposed metrics can achieve lower rate of throughput fluctuation than that of conventional metric by using the networks simulator Qualnet.

关键词： WMNs RTS CTS

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A provably secure ring signature scheme with bounded leakage resilience

A provably secure ring signature scheme with bounded leakage...

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10th International Conference on information Security Practice and Experience, ISPEC 2014

作者： Wang, Huaqun Wu, Qianhong Qin, Bo Zhang, Futai Domingo-Ferrer, Josep School of Information Engineering Dalian Ocean University China Shanghai Key Laboratory of Integrate Administration Technologies for Information Security China School of Electronic and Information Engineering Beihang University China School of Information Renmin University of China China School of Computer Science and Technology Nanjing Normal University China Dept. of Computer Engineering and Maths Universitat Rovira I Virgili Catalonia Spain

ISBN: (纸本)9783319063195

Conventionally, the unforgeability of ring signature schemes is defined in an ideal environment where the attackers cannot access any information about the secret keys of the signers. This assumption is too strong to be satisfied in the real world since the cryptographic operations involves the secret key information leakage in various ways due to power/time consumption difference in operations on the 0/1 bits of the secret key. An attacker can obtain this information both passively by collecting power consumption information or actively by injecting faults during the signing operations. Thus, provably secure ring signature in the conventional security definition may be insecure in the real world due to the key information leakage. To address this problem, we formalize the first bounded leakage resilience definition for ring signature. A leakage resilient ring signature scheme remains secure even if arbitrary, but bounded, information about the secret key is leaked to an adversary. A bound on the leaked information is necessary because a ring signature cannot be secure if some signer's secret key is fully leaked. Then we propose the first ring signature scheme with bounded leakage resilience. Following the enhanced security definition with leakage resilience, the proposed scheme is provably secure based on the difficulty of the second l-representation problem in finite field. © 2014 Springer International Publishing.

关键词： Authentication

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On prediction techniques for palette coding

On prediction techniques for palette coding

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作者： Jin, Guoxin Saxena, Ankur Fernandes, Felix Samsung Information Systems America 1301 E. Lookout Drive RichardsonTX75082 United States Electrical Engineering and Computer Science Dept. Northwestern University EvanstonIL60201 United States

ISBN: (纸本)9781479957514

Screen content video coding is becoming increasingly important in various applications, such as desktop sharing, video conferencing, and remote education. In January 2014, the ITU-T and ISO/IEC MPEG jointly issued call for proposals for screen content coding as an extension of HEVC. In general, compared to natural camera-captured video content, screen content has different characteristics, e.g., sharper edges, and fewer unique colors on a block-by-block basis. Palette coding for screen content has been recently proposed in the ongoing HEVC Range Extensions standardization. Palette coding utilizes the fact that there are few unique colors in screen content video blocks, and tries to send palettes of these unique colors. However, the size of these palettes can expand, especially in highresolution video. Therefore, to reduce the overall bits for palette transmission, we present various palette prediction techniques in this paper. We first analyze the characteristics of palettes in screen content, and then propose various palette prediction techniques. Our experiments on HEVC test sequences in state-of-the-art HM range extensions software for HEVC show significant improvements over palette coding without any prediction, at almost negligible additional complexity. © 2014 IEEE.

关键词： Forecasting

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Cosmic ray intensity variations in the 24th solar cycle observed by LAAS experiments 34

Cosmic ray intensity variations in the 24th solar cycle obse...

引用

34th International Cosmic Ray Conference, ICRC 2015

作者： Wada, Naoki Iyonoy, Atsushi Matsumoto, Hiroki Okei, Kazuhide Tsuji, Shuhei Ohara, Soji Ochi, Nobuaki Takahashi, Nobusuke Nakatsuka, Takao Yamamoto, Isao Yamamot, Saya Graduate School of Science Okayama University of Science 1-1 Ridai-cho Kita-ku Okayama-city Okayama700-0005 Japan Dept. of Fundamental Science Faculty of Science Okayama University of Science 1-1 Ridai-cho Kita-ku Okayama-city Okayama700-0005 Japan Kawasaki Medical School 577 Matsushima Kurashiki-cityOkayama701-0192 Japan Department of Informatics Naragakuen University Ikomagun-Nara6368503 Japan Faculty of Business Administration Toyo University 5-28-20 Hakusan Bunkyo-ku Tokyo112-8606 Japan Department of Advanced Physics Faculty of Science and Technology Hirosaki University 1 Bunkyo-cho Hirosaki-shi Aomori-ken036-8560 Japan Okayama Shoka University 2-10-1Tsushima Kyomachi Kita-ku Okayama-cityOkayama700-8601 Japan Department of Information and Computer Engineering Faculty of Engineering Okayama University of Science 1-1 Ridai-cho Kita-ku Okayama-city Okayama700-0005 Japan TOSHIBA MEMORY SYSTEMS Co. Ltd. Japan

In Large Area Air Shower experiments, one of EAS arrays is deployed on the second floor of four stories building in the campus of Okayama University of science to limit the zenith angle acceptance of muon detection. This system provide EAS muon intensities from zenith solid angles. To compare these intensities with solar activities such as flares, CME and magneticstorms, LAAS data have been analyzed. Faster data acquisition with Ha/CaK solar telescope have also been carried out. In this presentation, cosmic ray variations for four years since 2011 are going to be reported as well as fast image data.

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ON PREDICTION TECHNIQUES FOR PALETTE CODING

ON PREDICTION TECHNIQUES FOR PALETTE CODING

引用

IEEE International Conference on Image Processing

作者： Guoxin Jin Ankur Saxena Felix Fernandes Electrical Engineering & Computer Science Dept. Northwestern University Samsung Information Systems America

ISBN: (纸本)9781479957521

Screen content video coding is becoming increasingly important in various applications, such as desktop sharing, video conferencing, and remote education. In January 2014, the ITU-T and ISO/IEC MPEG jointly issued call for proposals for screen content coding as an extension of HEVC. In general, compared to natural camera-captured video content, screen content has different characteristics, e.g., sharper edges, and fewer unique colors on a block-by-block basis. Palette coding for screen content has been recently proposed in the ongoing HEVC Range Extensions standardization. Palette coding utilizes the fact that there are few unique colors in screen content video blocks, and tries to send palettes of these unique colors. However, the size of these palettes can expand, especially in high-resolution video. Therefore, to reduce the overall bits for palette transmission, we present various palette prediction techniques in this paper. We first analyze the characteristics of palettes in screen content, and then propose various palette prediction techniques. Our experiments on HEVC test sequences in state-of-the-art HM range extensions software for HEVC show significant improvements over palette coding without any prediction, at almost negligible additional complexity.

关键词： Palette Coding Palette prediction Screen content coding HEVC Range Extensions

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Mining contrast subspaces

Mining contrast subspaces

引用

18th Pacific-Asia Conference on Advances in Knowledge Discovery and Data Mining, PAKDD 2014

作者： Duan, Lei Tang, Guanting Pei, Jian Bailey, James Dong, Guozhu Campbell, Akiko Tang, Changjie School of Computer Science Sichuan University China School of Computing Science Simon Fraser University Canada Dept. of Computing and Information Systems University of Melbourne Australia Dept. of Computer Sci. and Engr. Wright State University United States Pacific Blue Cross Canada State Key Laboratory of Software Engineering Wuhan University China

ISBN: (纸本)9783319066073

In this paper, we tackle a novel problem of mining contrast subspaces. Given a set of multidimensional objects in two classes C+ and C - and a query object o, we want to find top-k subspaces S that maximize the ratio of likelihood of o in C+ against that in C -. We demonstrate that this problem has important applications, and at the same time, is very challenging. It even does not allow polynomial time approximation. We present CSMiner, a mining method with various pruning techniques. CSMiner is substantially faster than the baseline method. Our experimental results on real data sets verify the effectiveness and efficiency of our method. © 2014 Springer International Publishing.

关键词： Mining

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Plexe: A platooning extension for Veins

Plexe: A platooning extension for Veins

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IEEE Vehicular Networking Conference (VNC)

作者： Michele Segata Stefan Joerer Bastian Bloessl Christoph Sommer Falko Dressler Renate Lo Cigno Dept. of Information Engineering and Computer Science University of Trento Italy Computer and Communication Systems University of Innsbruck Austria Dept. of Computer Science University of Paderborn Germany

Cooperative driving in general and Cooperative Adaptive Cruise Control (CACC) or platooning in particular require blending control theory, communications and networking, as well as mechanics and physics. Given the lack of an integrated modeling framework and theory as well as the prohibitively high costs of using prototypes for what-if studies, simulation remains the fundamental instrument to evaluate entire cooperative driving systems. This work presents Plexe, an Open Source extension to Veins that offers researchers a simulation environment able to run experiments in realistic scenarios, taking into account physics and mechanics of the vehicles, communications and networking impairments, and Inter-Vehicle Communication (IVC) protocol stacks. Plexe is easily extensible and already implements protocols to support platooning and cooperative driving applications and several state of the art cruise control models. We describe the structure of the simulator and the control algorithms that Plexe implements and provide two use cases which show the potential of our framework as a powerful research tool for cooperative driving systems.

关键词： Vehicles Acceleration Veins Protocols Roads Vehicle dynamics Safety

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Wiki-supported distributed requirements engineering for big stakeholder groups

Wiki-supported distributed requirements engineering for big ...

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Gemeinschaften in Neuen Medien, GeNeMe 2007 - Communities in New Media, GeNeMe 2007

作者： Hagen, Mariele Jungmann, Berit Lauenroth, Kim PRO DV Software AG Hauert 6 Dortmund Germany T-Systems Multimedia Solutions GmbH Riesaer Str. 5 Dresden Germany Dept. of Software Systems Engineering Institut for Computer Science and Business Information System University of Duisburg-Essen Essen Germany

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Web information mining and decision support platform for the modern service industry 52

Web information mining and decision support platform for the...

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52nd Annual Meeting of the Association for Computational Linguistics, ACL 2014

作者： Li, Binyang Zhou, Lanjun Wei, Zhongyu Wong, Kam-Fai Xu, Ruifeng Xia, Yunqing Dept. of Information Science and Technology University of International Relations China Dept. of Systems Engineering and Engineering Management The Chinese University of Hong Kong N.T. Shatin Hong Kong MoE Key Laboratory of High Confidence Software Technologies China Shenzhen Research Institute The Chinese University of Hong Kong Harbin Institute of Technology Shenzhen Graduate School Shenzhen China Department of Computer Science and Technology TNList Tsinghua University China

ISBN: (纸本)9781941643006

This demonstration presents an intelligent information platform MODEST. MODEST will provide enterprises with the services of retrieving news from websites, extracting commercial information, exploring customers' opinions, and analyzing collaborative/competitive social networks. In this way, enterprises can improve the competitive abilities and facilitate potential collaboration activities. At the meanwhile, MODEST can also help governments to acquire information about one single company or the entire board timely, and make prompt strategies for better support. Currently, MODEST is applied to the pillar industries of Hong Kong, including innovative finance, modem logistics, information technology, etc. © 2014 Association for Computational Linguistics.

关键词： Decision support systems

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