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

作者： Samah Al-Helo Raja' S. Alomari Vipin Chaudhary M. B. Al-Zoubi Dept. of Computer Information Systems University of Jordan Dept. of Computer science and Engineering University at Buffalo

ISBN: (纸本)9781424441211

Lumbar area of the vertebral column bears the most load of the human body and thus it is responsible for the major portion of lower back pain from which 80% to 90% of people suffer from during their lifetime. Vertebra related diseases are mainly fracture and are usually diagnosed from X-ray radiographs or CT scans depending on the severity of the problem. In this paper, we propose a fully automated lumbar vertebra segmentation that accurately and robustly produces a smooth contour around each of the vertebrae. This segmentation is very useful in any subsequent CAD system for diagnosis and quantification of vertebrae fractures. It also serves the radiologist during the clinical routine. Our method shows an excellent level of vertebra boundary smootheness that was visually approved by our collaborating radiologist for each vertebra and each case from our fifty cases dataset that includes both normal and abnormal cases.

关键词： CT Segmentation Lumbar Fracture Active Shape Model

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Automated extraction of nested sulcus features from human brain MRI data

Automated extraction of nested sulcus features from human br...

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

作者： Forrest Sheng Bao Joachim Giard Jason Tourville Arno Klein F. S. Bao is with Depts. of Computer Science and Electrical Engineering Texas Tech University Lubbock Texas J. Giard is with Institute of Information and Communication Technologies Electronics and Applied Mathematics Université Catholique de Louvain Louvain Belgium J. Tourville is with Dept. of Speech Language and Hearing Sciences and Center for Computational Neuroscience and Neural Technology Boston University Boston Massachusetts A. Klein is with New York Psychiatric Institute Columbia University New York New York

ISBN: (纸本)9781424441198

Extracting objects related to a fold in the cerebral cortex ("sulcus features") from human brain magnetic resonance imaging data has applications in morphometry, landmark-based registration, and anatomical labeling. In prior work, sulcus features such as surfaces, fundi and pits have been extracted separately. Here we define and extract nested sulcus features in a hierarchical manner from a cortical surface mesh having curvature or dept. values. Our experimental results show that the nested features are comparable to features extracted separately using other methods, and that they are consistent across subjects and with manual label boundaries. Our open source feature extraction software will be made freely available as part of the Mindboggle project ().

关键词： Automated extraction MRI data sulcus features

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Anytime Algorithms for GPU Architectures

Anytime Algorithms for GPU Architectures

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Real-Time systems.Symposium (RTSS)

作者： Rahul Mangharam Aminreza Abrahimi Saba Dept. of Electrical and Systems Engineering University of Pennsylvania Dept. of Computer and Information Science University of Pennsylvania

Most algorithms are run-to-completion and provide one answer upon completion and no answer if interrupted before completion. On the other hand, anytime algorithms have a monotonic increasing utility with the length of execution time. Our investigation focuses on the development of time-bounded anytime algorithms on Graphics Processing Units (GPUs) to trade-off the quality of output with execution time. Given a time-varying workload, the algorithm continually measures its progress and the remaining contract time to decide its execution pathway and select system resources required to maximize the quality of the result. To exploit the quality-time tradeoff, the focus is on the construction, instrumentation, on-line measurement and decision making of algorithms capable of efficiently managing GPU resources. We demonstrate this with a Parallel A* routing algorithm on a CUDA-enabled GPU. The algorithm execution time and resource usage is described in terms of CUDA kernels constructed at design-time. At runtime, the algorithm selects a subset of kernels and composes them to maximize the quality for the remaining contract time. We demonstrate the feedback-control between the GPU-CPU to achieve controllable computation tardiness by throttling request admissions and the processing precision. As a case study, we have implemented AutoMatrix, a GPU-based vehicle traffic simulator for real-time congestion management which scales up to 16 million vehicles on a US street map. This is an early effort to enable imprecise and approximate real-time computation on parallel architectures for stream-based time-bounded applications such as traffic congestion prediction and route allocation for large transportation networks.

关键词： Graphics processing unit Kernel Algorithm design and analysis Arrays Runtime Vehicles

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On the necessity of user-friendly CAPTCHA 11

On the necessity of user-friendly CAPTCHA

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Proceedings of the SIGCHI Conference on Human Factors in Computing systems

作者： Fidas, Christos A. Avouris, Nikolaos M. Voyiatzis, Artemios G. Electrical and Computer Engineering Dept. Interactive Technologies Lab. HCI Group GR-26504 Patras Greece Industrial Systems Institute RC 'Athena' Patras Science Park GR-26504 Patras Greece

ISBN: (纸本)9781450302289

A "Completely Automated Public Turing test to tell computers and Humans Apart" (CAPTCHA) is a mechanism widely used nowadays for protection of web applications, interfaces, and services from malicious users. A questionnaire-based survey combined with a real usage scenario of a native-language CAPTCHA mechanism was conducted in order to investigate several aspects that affect end-user perceptions related to the quality of CAPTCHA. A total of 210 participants of age between 19 and 64 participated during May and July 2010. The survey results validate the common belief that CAPTCHAs are still difficult for humans to solve. They also provide insights that can be applied to improve users' experience on interacting with CAPTCHA systems. Copyright 2011 ACM.

关键词： Surveys

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E-AirQuality: A dynamic web based application for evaluating the air quality index for the city of Kozani, Hellas

E-AirQuality: A dynamic web based application for evaluating...

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15th Panhellenic Conference on Informatics, PCI 2011

作者： Ioannis, Skordas Fragulis, George F. Triantafyllou, Athanassios G. Dept. of Geotechnology and Environmental Engineering Laboratory of Atmospheric Pollution and Environmental Physics Tecnological Educational Inst. of Western Macedonia Kozani Hellas Greece Laboratory of Web Technologies and Applied Control Systems Dept. of Computer Science and Mathematics Tecnological Educational Inst. of Western Macedonia Kozani Hellas Greece

ISBN: (纸本)9780769543895

The purpose of this work is to provide access to meteorological data as well as information of the status of air quality for the city of Kozani in real time with a userfriendly interface. The application has been developed using only open source software . MySQL has been used as a relational database management system, PHP as the scripting language for the development of the application and to connect the application to the database and Javascript/HTML for the user interface programming . The users are separated to two different groups (simple users-visitors and authorised users). Each group is provided by a number of functionalities. © 2011 IEEE.

关键词： Open source software

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Corporate News Classification and Valence Prediction: A Supervised Approach 11

Corporate News Classification and Valence Prediction: A Supe...

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Workshop on Computational Complexity Analysis and Algorithm Design for Combinatorial Optimization Problems

作者： Syed Aqueel Haider Rishabh Mehrotra Dept. of Computer Science & Engineering MIT Manipal University KA-576104 India Computer Science & Information Systems Group BITS Pilani RajasthanIndia

ISBN: (纸本)9781618392466

News articles have always been a prominent force in the formation of a company's financial image in the minds of the general public, especially the investors. Given the large amount of news being generated these days through various websites, it is possible to mine the general sentiment of a particular company being portrayed by media agencies over a period of time, which can be utilized to gauge the long term impact on the investment potential of the company. However, given such a vast amount of news data, we need to first separate corporate news from other kinds namely, sports, entertainment, science & technology, etc. We propose a system which takes news as, checks whether it is of corporate nature, and then identifies the polarity of the sentiment expressed in the news. The system is also capable of distinguishing the company/organization which is the subject of the news from other organizations which find mention, and this is used to pair the sentiment polarity with the identified company.

关键词： news polarity websites

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Data visualization technique framework for intrusion detection

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International Journal of computer science Issues 2011年第5 5-1期8卷 440-443页

作者： Riad, Alaa El-Din Elhenawy, Ibrahim Hassan, Ahmed Awadallah, Nancy Information Systems Dept. Faculty of Computer Science and Information Systems Mansoura University Egypt Mansoura DK 35513 Egypt Faculty of Computer Science and Information Systems Zagazig University Egypt Zagazig Egypt Faculty of Engineering Mansoura University Egypt Mansoura DK 35513 Egypt Faculty of Computer Science and Information Systems Mansoura University Egypt Mansoura DK 35513 Egypt

Network attacks have become the fundamental threat to today's largely interconnected computer system. Intrusion detection system (IDS) is indispensable to defend the system in the face of increasing vulnerabilities. While a number of information visualization software frameworks exist, creating new visualizations, especially those that involve novel visualization metaphors, interaction techniques, data analysis strategies, and specialized rendering algorithms, is still often a difficult process. To facilitate the creation of novel visualizations this paper presents a new framework that is designed with using data visualization technique for analysis and visualizes snort result data for user. The framework suggests PHP and CSS as data visualization technique and snort as intrusion detection system (IDS).

关键词： Data visualization

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Recent trends in computational intelligence in life sciences 19

Recent trends in computational intelligence in life sciences

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19th European Symposium on Artificial Neural Networks, ESANN 2011

作者： Seiffert, Udo Schleif, Frank-Michael Zühlke, Dietlind Fraunhofer IFF Magdeburg Dept. Biosystems Engineering Sandtorstrasse 22 Magdeburg39106 Germany University of Magdeburg Institute of Electronics Signal Processing and Communications P.O. Box 4120 Magdeburg39016 Germany University of Bielefeld AG Theoretical Computer Science Universitätsstrasse 21-23 Bielefeld33615 Germany RWTH Aachen University Dept. Information Systems Ahornstrasse 55 Aachen52056 Germany Fraunhofer FIT Sankt Augustin Dept. Life Science Informatics Schloss Birlinghoven Sankt Augustin53754 Germany

ISBN: (纸本)9782874190445

Computational intelligence generally comprises a rather large set of – in a wider sense – adaptive and human-like data analysis and modelling methods. Due to some superior features – such as generalisation, trainability, coping with incomplete and inconsistent data, etc. – computational intelligence has found its way into numerous applications in almost all scientific disciplines. A very prominent field among them are life sciences that are characterised by some unique requirements in terms of data structure and analysis. © European Symposium on Artificial Neural Networks. All rights reserved.

关键词： Neural networks

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Extracting environmental constraints to make reactive system specifications realizable

Computer Software

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computer Software 2011年第3期28卷 132-146页

作者： Hagihara, Shigeki Shimakawa, Masaya Yonezaki, Naoki Kitamura, Yusuke Sekido, Satoshi Department of Computer Science Graduate School of Information Science and Engineering Institute of Technology Japan System Engineering Dept. Sony Business Solutions Corporation Value Creation Division Japan Department of Communications and Integrated Systems Graduate School of Science and Engineering Tokyo Institute of Technology Japan

Many fatal accidents of safety critical reactive systems.have occurred in unexpected situations which had not been considered during design and test phases of the systems. To prevent these accidents, reactive systems.should be designed to respond appropriately to any requests of any timing from their environments. Verifying this property in specification phase reduces the development costs of safety critical reactive systems. This property of a specification is well known as realizability. If a specification was found not to be realizable, we have to determine the flaws in the unrealizable specification. Unrealizability of a specification arises from arbitrary requirements given by system designers. From a different point of view, it can be thought that the unrealizable specification implicitly imposes a precondition on the behavior of environment, which a system can not control. If it is possible to obtain the precondition in intuitively comprehensive forms, this makes it easy for system designers to understand the cause of flaws in specifications. In this paper, we propose methods for deriving constraints on the behavior of environments, which is implicitly imposed by unrealizable specifications. Instead of realizability, we use strong satisfiability which is a necessary condition for realizability, due to the fact that many practical unrealizable specifications are also strongly unsatisfiable, and strong satisfiability have the advantage of lower complexity for analysis against realizability. These methods derive constraints in propositional linear temporal logic from Büchi automata representing specifications. The expressions of derived constraints are limited to simple and intuitively comprehensive forms where only two temporal operators appear successively. We give proofs for three correctness properties of our methods, i.e. the termination property, the soundness property, and the weakest constraints derivability. We also discuss complexity of our methods. Fi

关键词： Specifications

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A case analysis of factors affecting the adoption of grid technology by universities

2011 IST-Africa Conference Proceedings, IST 2011

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2011 IST-Africa Conference Proceedings, IST 2011 2011年

作者： Uzoka, F.M.E. Akinnuwesi, B.A. Olabiyisi, S.O. Alabi, D. Department of Computer Science and Information Systems Mount Royal University Calgary Canada Dept. of Information Technology Bells University of Techn Ota Nigeria Department of Computer Science and Engineering Ladoke Akintola University of Technology Ogbomosho Nigeria Dept of Information Technology Bells University of Technology Ota Nigeria

ISBN: (纸本)9781905824267

Grid computing is emerging as the foundation upon which virtual collaborations can be built among large organizations with the aim of integrating and sharing computer resources, and thus offering performance speed and resource availability, which is unattainable by any single institutional technology resources. With the level of increase in the number of tertiary institutions in Africa, and the attendant lack of basic information technology resources, the use of grid computing for collaboration purposes would contribute to the enhancement of research, course delivery, course management, and other aspects of institutional development. This paper carries out an empirical study of the possibility of adoption of grid computing as a vehicle for collaboration among tertiary institutions in Nigeria from the perspective of the potential adopters (users) of the systems. This study uncovers challenges to the adoption of grid technology by the tertiary institutions. The key challenges that significantly affect the adoption of grid computing in tertiary institutions are mainly attitudinal (perceived need and perceived benefits). Infrastructural issues (facilitating conditions) also impose limitations on the ability of universities to implement grid computing. © 2011 IIMC LTD.

关键词： Curricula

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