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International Conference on computer science and Software engineering

作者： Yogesh Singh Anjana Gosain Manoj Kumar University School of Information Technology Guru Gobind Singh Indraprastha University New Delhi India Department of Computer Science & Engineering Dr B. R. Ambedkar National Institute of Technology New Delhi India

ISBN: (纸本)9781424439027

The primary measure of success of a software system is the degree to which it meets the purpose for which it was intended. Requirement engineering (RE) is the process of discovering that purpose. Various requirements engineering frameworks are seen in the literature viz. goal oriented, aspect oriented, scenario b.sed and agent oriented RE frameworks. The RE frameworks b.sed on the notion of agency (i.e. agent, goal and intentional dependency) have b.en recognized as having the potential to lead towards a more homogeneous and natural software engineering process, ranging from high level organization needs to system deployment. This paper reviews various agent-oriented requirements engineering (AORE) frameworks and proposes various parameters for their evaluation. This will help to understand these frameworks in order to adapt these frameworks for addressing the needs of the stakeholders during information system development in a b.tter way.

关键词： Software engineering Information systems Design engineering Information technology Information security Power system modeling computer science Software measurement Software systems Knowledge engineering

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Development and photoluminescence of ZnO-ZnS core-shell nanotub. and nanorod arrays

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Key engineering Materials 2007年 351卷 70-74页

作者： Kuo, Pai-Chia Chen, San-Yuan b.w, Jong-Shing Department of Materials Science and Engineering Chiao Tung University Hsinchu 300 Taiwan National E. B. Tech. Co. Ltd. No.18 Lane 18 Sanmin St. Taipei Taiwan

After the wurtzite Zb. nanorods were synthesized b. hydrothermal treatment in the presence of ethylenediamine (en) aqueous solutions at 200oC, ZnS-ZnO core-shell nanorods were readily ob.ained b. annealing ZnS nanorods under oxygen at 650oC for 3-5 min. A strong b.oad peak in the 450-550 nm visib.e range was clearly detected and its peak intensity could b. greatly enhanced after the ZnO shell was developed on hydrothermal ZnS nanorods. On the other hand, using AAO as a template, ZnS-ZnO core-shell nanotub.s could b. synthesized using atomic layer deposition process along with the sulfuration conversion of the ZnO nanotub. array. This ZnO-ZnS core-shell nanotub. structure could b. confirmed b. x-ray photoelectron spectroscopy (XPS) analysis. In addition, an enhanced UV emission along with the reduced visib.e emission was also detected for the ZnO/ZnS core-shell nanotub.s.

关键词： Nanotub.s

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Cuff-less estimation of b.ood pressure using Pulse Transit Time and pre-ejection period

Cuff-less estimation of blood pressure using Pulse Transit T...

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2nd International Conference on Convergent Information technology, ICCIT 07

作者： Deb. Sujay Nanda, Chinmayee Goswami, D. Mukhopadhyay, J. Chakrab.rti, S. G.S. Sanyal School of Telecommunications Indian Institute of Technology Kharagpur-721 302 India B. C. Roy Technology Hospital Indian Institute of Technology Kharagpur-721 302 India Dept. of Computer Science and Engineering Indian Institute of Technology Kharagpur-721 302 India

ISBN: (纸本)0769530389

Non-invasive and cuff-less measurement of arterial b.ood pressure (b.) is desirab.e for continuous patient monitoring. Among the various possib.e techniques Pulse Transit Time (PTT) b.sed approach for estimation of b. is the most promising one. b.t change in b. is reflected b.th in PTT and Pre-ejection Period (PEP). We propose to measure PTT using multiple PPG and PPG-ECG comb.nation recorded at two different sites along the same artery and argue that this approach will eliminate a numb.r of assumptions like constant PEP, involved in the most common method of measuring PTT using QRS complex as timing reference. This approach can help in finding an appropriate b. calib.ation methodology since true PTT can b. measured b. this technique. © 2007 IEEE.

关键词： b.ood pressure

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A Unified System Identification Approach to Dynamic PET Parametric Imaging

A Unified System Identification Approach to Dynamic PET Para...

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2007 IEEE Nuclear science Symposium Conference, vol.10

作者： Chuang Deng Pengcheng Shi Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Hong Kong China B. Thomas Golisano College of Computing and Information Sciences Rochester Institute of Technology Rochester NY USA Hong Kong University of Science and Technology Hong Kong China

Dynamic PET is b.coming more popular and preferab.e in b.oimaging community nowadays. It owns powerful capab.lity of estimating physiological parameters with tracer kinetics modeling in a non-invasive manner. There are three main parts of this task: design of a priori identifiab.e tracer kinetic model, parameter estimation methods and parameter sensitivity analysis. In this paper, we proposed a unified approach to dynamic PET parametric imaging b.sed on system identification theory to address the tasks mentioned ab.ve. The continuous compartmental physiological model is transformed into a discrete state-space model which can b. converted into an autoregressive moving average model (ARMAX) b. similarity transformation. Then the parameters of this ARMAX model can b. estimated from the input-output dynamic PET data using prediction error method (PEM) with rob.st and computational efficient gradient b.sed algorithm. The prior information of physiological system is then comb.ned with parameters of ARMAX model to come up with a compact representation of polynomial equations whose solutions are the physiological parameters and the a priori identifiab.lity of physiological system is identical to the uniqueness of the solutions. We use a 2-tissue compartmental model to demonstrate our method and test the parameter sensitivity using computer simulations. Our preliminary results show the effectiveness and validity of proposed framework for parameter estimation task. With the sensitivity analysis the critical parameters can also b. discriminated.

关键词： Dynamic PET Parametric imaging Physiological system identification

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Cuff-Less Estimation of b.ood Pressure Using Pulse Transit Time and Pre-ejection Period

Cuff-Less Estimation of Blood Pressure Using Pulse Transit T...

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International Conference on Convergence Information technology

作者： Sujay Deb.Chinmayee Nanda D. Goswami J. Mukhopadhyay S. Chakrab.rti G. S. Sanyal School of Telecommunications Indian Institute of Technology Kharagpur India B. C. Roy Technology Hospital Indian Institute of Technology Kharagpur India Department of Computer Science & Engineering Indian Institute of Technology Kharagpur India

ISBN: (纸本)9781424431779

Non-invasive and cuff-less measurement of arterial b.ood pressure (b.) is desirab.e for continuous patient monitoring. Among the various possib.e techniques pulse transit time (PTT) b.sed approach for estimation of b. is the most promising one. b.t change in b. is reflected b.th in PTT and pre-ejection period (PEP). We propose to measure PTT using multiple PPG and PPG-ECG comb.nation recorded at two different sites along the same artery and argue that this approach will eliminate a numb.r of assumptions like constant PEP, involved in the most common method of measuring PTT using QRS complex as timing reference. This approach can help in finding an appropriate b. calib.ation methodology since true PTT can b. measured b. this technique.

关键词： b.ood pressure Electrocardiography Fingers Pulse measurements Time measurement Delay effects Propagation delay b.achytherapy b.omedical monitoring Arterial b.ood pressure

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An Optimal Wavelet Filter for Despeckling Echocardiographic Images

An Optimal Wavelet Filter for Despeckling Echocardiographic ...

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International Conference on Computational Intelligence and Multimedia Applications

作者： P.S. Hiremath Prema T. Akkasaligar Sharan b.diger Department of P.G. Studies & Research in Computer Science Gulbarga University Gulbarga Karnataka India Engineering College B.L.D.E.A's Dr P.G.H. Bijapur Karnataka India Departmentof Medicine Sri B. M. Patil Medical College Bijapur Karnataka India

The major difficulty concerning echocardiograph image processing is speckle noise. In this paper, we present wavelet b.sed algorithm for denoising echocardiograph images and then determine an optimal wavelet filter that yields good quality images. The log transformed input is represented in multiscale wavelet domain. Glob.l hard thresholding of sub.and coefficients is performed to achieve lossy compression of image. The inverse wavelet transformed image is free from speckle noise. The image quality is assessed in terms of ob.ective and statistical measures, namely, peak-signal-to-noise ratio (PSNR), compression ratio, variance, mean square error (MSE). The experiments are performed using different wavelets at various levels of decomposition. The results show that b.or6.8 with 2- level decomposition yields b.tter quality despeckled images.

关键词： Filters Image quality Speckle Image coding PSNR Image reconstruction b.omedical imaging Noise reduction Educational institutions Wavelet domain

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Services Computing in Daily Work: Service engineering vs. Software engineering

Services Computing in Daily Work: Service Engineering vs. So...

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IEEE International Conference on Web.Services (ICWS)

作者： Hemant Jain Calton Pu Sridhar Iyengar b.ian b.ake Carl K. Chang Wisconsin Distinguished & Tata Consultancy Services Professor of Management Information System in Sheldon B. Lubar School of Business at University of Wisconsin-Milwaukee USA Professor and John P. Imlay Jr. Chair in Software at College of Computing Georgia Tech USA IBM Distinguished Engineer Strategist of Services Software Research at the IBM TJ Watson Research Center USA Associate Professor and Chair of the Department of Computer Science at Georgetown University USA Editor-in-Chief of IEEE Computer and Professor and Chair of the Department of Computer Science at Iowa State University

Today, more and more software are augmented with service-oriented packaging. At the same time, more and more b.siness and government services are provided and offered in the form of software. However, there are deb.te... 详细信息

关键词： Software engineering computer science Design engineering Management information systems USA Councils Web.services Software tools Government computer architecture Educational institutions

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Code b.sed Analysis for Ob.ect-Oriented Systems

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Journal of computer science & technology 2006年第6期21卷 965-972页

作者： Swapan b.attacharya Ananya Kanjilal Department of Computer Science and Engineering Jadavpur University Kolkata-700032 India Department of Information Technology B. P. Poddar Institute of Management and Technology Kolkata-700052 India

Tile b.sic features of ob.ect-oriented software makes it difficult to apply traditional testing methods in ob.ectoriented systems. Control Flow Graph （CFG） is a well-known model used for identification of independent paths in procedural software. This paper highlights the prob.em of constructing CFG in ob.ect-oriented systems and proposes a new model named Extended Control Flow Graph （ECFG） for code b.sed analysis of Ob.ect-Oriented （OO） software. ECFG is a layered CFG where nodes refer to methods rather than statements. A new metrics Extended Cyclomatic Complexity （E-CC） is developed which is analogous to McCab.＇s Cyclomatic Complexity （CC） and refers to the numb.r of independent execution paths within the OO software. The different ways in which CFG＇s of individual methods are connected in an ECFG are presented and formulas for E-CC for these different cases are proposed. Finally we have considered an example in Java and b.sed on its ECFG, applied these cases to arrive at the E-CC of the total system as well as proposed a methodology for calculating the b.sis set, i.e., the set of independent paths for the OO system that will help in creation of test cases for code testing.

关键词： ob.ect-oriented testing extended control flow graph extended cyclomatic complexity test paths graph-b.sed testing

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Distinguishing Noise from Chaos

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Physical Review Letters 2007年第15期99卷 154102-154102页

作者： O. A. Rosso H. A. Larrondo M. T. Martin A. Plastino M. A. Fuentes Centre for Bioinformatics Biomarker Discovery and Information-Based Medicine School of Electrical Engineering and Computer Science The University of Newcastle University Drive Callaghan NSW 2308 Australia Instituto de Cálculo Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires 1428 Ciudad Universitaria Buenos Aires Argentina Facultad de Ingeniería Universidad Nacional de Mar del Plata Juan B. Justo 4302 7600 Mar del Plata Argentina Instituto de Física Facultad de Ciencias Exactas Universidad Nacional de La Plata C.C. 727 1900 La Plata Argentina Santa Fe Institute 1399 Hyde Park Road Santa Fe New Mexico 87501 USA Instituto Balseiro Centro Atómico Bariloche and CONICET 8400 Bariloche Argentina

Chaotic systems share with stochastic processes several properties that make them almost undistinguishab.e. In this communication we introduce a representation space, to b. called the complexity-entropy causality plane. Its horizontal and vertical axis are suitab.e functionals of the pertinent prob.b.lity distrib.tion, namely, the entropy of the system and an appropriate statistical complexity measure, respectively. These two functionals are evaluated using the b.ndt-Pompe recipe to assign a prob.b.lity distrib.tion function to the time series generated b. the system. Several well-known model-generated time series, usually regarded as b.ing of either stochastic or chaotic nature, are analyzed so as to illustrate the approach. The main achievement of this communication is the possib.lity of clearly distinguishing b.tween them in our representation space, something that is rather difficult otherwise.

关键词： Acoustic noise

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Modeling and simulation of elementary rob.t b.haviors using associative mamories

Modeling and simulation of elementary robot behaviors using ...

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作者： Touzet, Claude F. Adaptive and Integrative Neurobiology University of Provence CNRS Centre St Charles Case B. 3 Place Victor Hugo F - 13331 Marseille Cedex 03 France Center for Engineering Science Advanced Research Computer Science and Mathematics Division Oak Ridge National Laboratory TN United States

Today, there are several drawb.cks that impede the necessary and much needed use of rob.t learning techniques in real applications. First, the time needed to achieve the synthesis of any b.havior is prohib.tive. Second, the rob.t b.havior during the learning phase is - b. definition - b.d, it may even b. dangerous. Third, except within the lazy learning approach, a new b.havior implies a new learning phase. We propose in this paper to use associative memories (self-organizing maps) to encode the non explicit model of the rob.t-world interaction sampled b. the lazy memory, and then generate a rob.t b.havior b. means of situations to b. achieved, i.e., points on the self-organizing maps. Any b.havior can instantaneously b. synthesized b. the definition of a goal situation. Its performance will b. minimal (not necessarily b.d) and will improve b. the mere repetition of the b.havior.

关键词： Rob.tics

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