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

作者： Farhan Baluch Laurent Itti Neuroscience Graduate Program University of Southern California Los Angeles CA 90089 Neuroscience Graduate Program and the faculty of the Dept. of Computer Science Viterbi School of Engineering University of Southern California Los Angeles CA 90089

ISBN: (纸本)9781424441198

We present a self-contained portable USB based device that can amplify and record small bioelectric signals from insects and animals. The system combines a purpose built low noise amplifier with off the shelf components to provide a low cost low power system for recording electrophysiological signals. Using open source software the system is programmed as a simple USB device and can be connected to any USB capable computer for recording data. This simple and universal interface provides the ability to connect to a variety of systems. Open source acquisition software was also written to record signals under the linux operating system. Performance analysis shows that our device is able to record good quality signals both indoors and outdoors and delivers this performance at a very low cost. Compared to larger systems our device provides the additional advantage of portability given that it can fit into a pocket and costs a fraction of large systems used in electrophysiology labs.

关键词： contained electrophysiology amplify

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Reversible JPEG Data Hiding Based on EMD

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通讯和计算机（中英文版） 2012年第10期9卷 1135-1141页

作者： Wen-Chung Kuo Shao-Hung Kuo Department of Computer Science and Information Engineering National Yunlin University of Science & Technology Yunlin 672 Taiwan Graduate School of Engineering Science and Technology Doctoral Program National Yunlin University of Science and Technology Yunlin 640 Taiwan

As the rapid growth of smart phone technology, people have a lot of digital image information such as digital photos or videos. Both data hiding and data compression are very important technologies in image processing field. On the overview, it seems that there is no relationship between data hiding and data compression because data hiding mechanisms focus on information security and data compression mechanisms emphasize the compression ratio. However, the more secret data is embedded, the more capacity the stego image increases. Actually, they are closely related. Until now, there are many literatures to discuss the secret data how to be embedded into the media image and keeps the original capacity as soon as possible. In this paper, a reversible data hiding scheme based on EMD data hiding and JPEG (Joint Picture Experts Group) compression technology will be proposed. According to experimental results, the authors can prove that our proposed scheme maintains high embedding capacity, security and good compression ratio.

关键词：数据隐藏 JPEG EMD 可逆数字图像信息数据嵌入压缩技术数据压缩

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Developing a Smart Grids System as a PBL with Agile Method on computer engineering Courses

Developing a Smart Grids System as a PBL with Agile Method o...

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International Conference on Information Technology: New Generations (ITNG)

作者： Caio Henrique Coutinho Johnny Cardoso Marques Sarasuaty Megume Hayashi Yelisetty Samoel Mirachi Alexandre Lima Possebon Ribeiro Marcelo Amaral da Silva Adilson Marques da Cunha Luiz Alberto Vieira Dias Electronics and Computer Engineering Graduate Program Brazilian Aeronautics Institute of Technology (Instituto Tecnologico de Aeronatica-ITA) Sao Jose dos Campos Brazil

This paper describes an experiment of integrating three courses at the Brazilian Aeronautics Institute of Technology, within the Electronic and computer engineering graduate program on the 1st semester of 2011. A smart grids system was used as a Problem Based Learning (PBL) strategy together with an agile method and best practices within a project developed on three courses: CE-240 Database Systems Project, CE-245 Information Technologies, and CE-229 Software Testing. Students of these courses had to interact, in order to produce a prototype of a smart grids system, simulating a real project development. At the end, a survey among students has proved that the integration of practical exercises has provided higher levels of understanding and problem solving capabilities, improving students' knowledge. The survey also has shown that communication between students from different courses should be improved. The major findings of this paper were that the integration of the three courses was favorable by 83% of the surveyed students, and most students (73%) have considered that their knowledge was improved. Authors recommend the use of practical exercises, courses integration, and PBL to considerably increase the quality of electronic and computer engineering courses.

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Evolving Neural Fuzzy Network with Adaptive Feature Selection

Evolving Neural Fuzzy Network with Adaptive Feature Selectio...

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International Conference on Machine Learning and Applications (ICMLA)

作者： Alisson Marques Silva Walmir Matos Caminhas André Paim Lemos Fernando Gomide Graduate Program in Electrical Engineering Federal University of Minas Gerais UFMG Belo Horizonte MG Brazil School of Electrical and Computer Engineering University of Campinas UNICAMP Campinas sp Brazil

This paper introduces a neural fuzzy network approach for evolving system modeling. The approach uses neofuzzy neurons and a neural fuzzy structure monished with an incremental learning algorithm that includes adaptive feature selection. The feature selection mechanism starts considering one or more input variables from a given set of variables, and decides if a new variable should be added, or if an existing variable should be excluded or kept as an input. The decision process uses statistical tests and information about the current model performance. The incremental learning scheme simultaneously selects the input variables and updates the neural network weights. The weights are adjusted using a gradient-based scheme with optimal learning rate. The performance of the models obtained with the neural fuzzy modeling approach is evaluated considering weather temperature forecasting problems. Computational results show that the approach is competitive with alternatives reported in the literature, especially in on-line modeling situations where processing time and learning are critical.

关键词： Computational modeling Adaptation models Input variables Neural networks Neurons Adaptive systems Predictive models

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Smart Environmental Architecture for Node Localization in a Wireless Sensor Network

Smart Environmental Architecture for Node Localization in a ...

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International Conference on Intelligent Environments (IE)

作者： Salvador Jauregui-Ortiz Mario Siller Felix Ramos Edson Scalabrin Electrical Engineering and Computer Science Department Center of Research and Advanced Studies of the IPN Guadalajara Jalisco Mexico Graduate Program in Computer Science Pontifical Catholic University Parana Brazil Curitiba Parana Brazil

As far as we know, there is not a Node Localization Algorithm (NLA) that presents the same accuracy for all possible scenarios. We believe that a NLA should be able to "interpret" the dynamic information of the environment. In this sense, simple NLAs are rather focused and might perform well for specific scenarios and applications. Therefore, information fusion and context awareness seems to be an appropriate approach to address this issue. We propose the Smart Environmental Architecture for Node Localization (SEA-NL), which is composed by two main elements: (i) the Smart Beacon Nodes (SBNs) and (ii) the Logical Position of Nodes (LPN). In (i) the obstruction level indicator is estimated and can improve the estimation of distances among nodes. In (ii) environment information and a one to one relation between a node and an object are used and can also improve location estimation. Via simulation, our architecture was tested indoors and outdoors considering three localization algorithms: the Weighed Centroid Localization (WCL), the Centroid Localization, and the Triangular Centroid Localization. Finally, we present an accuracy comparison among NLAs used in isolated way, and by using the SBNs, the LPN, and the SEA-NL, where our architecture improves WCL up to ~30.88%.

关键词： Wireless sensor networks Accuracy Estimation computer architecture Buildings Attenuation Monitoring

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Phase transition behavior in microcantilevers coated with M 1-phase VO2 and M2-phase VO2:Cr thin films

Phase transition behavior in microcantilevers coated with M ...

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作者： Rúa, Armando Cabrera, Rafmag Coy, Horacio Merced, Emmanuelle Sepúlveda, Nelson Fernández, Félix E. Department of Physics University of Puerto Rico Mayagüez 00681-9000 Puerto Rico Doctoral Program in Physics Graduate Center City University of New York New York 10016 United States Applied Materials Group Electrical and Computer Engineering Department Michigan State University E. Lansing MI 48824 United States

Silicon microcantilevers were coated by pulsed laser deposition with vanadium dioxide (VO2) (monoclinic M1 phase) and V 1-xCrxO2 with x near 0.024 (monoclinic M 2 phase), and their mechanical characteristics were studied as a function of temperature through the films' insulator-to-metal transition (IMT). The undoped VO2 films grew with (011)M1 planes parallel to the substrate, while Cr-doped VO2 films grew oriented with (201)M2 and (2 01)M2 planes parallel to the substrate. In both cases, the films transformed reversibly through the IMT to the tetragonal (rutile, R) phase, with film (110)R planes oriented parallel to the substrate. The fundamental resonant frequencies of the cantilevers were measured as the temperature was cycled from ambient temperature, through the IMT, and up to 100 °C. Very high resonant frequency changes were observed through the transition for both types of samples, with increases during heating of over 11 and over 15 for the cantilevers coated with pure and Cr-doped VO2, respectively. From the resonant frequencies measured at room temperature for the bare and coated cantilevers in each case, the effective Young's moduli of the films were determined. The values obtained, assuming bulk densities for the films, are 156 ± 7.5 GPa for VO2 (M1 phase) and 102 ± 3 GPa for Cr-doped VO2 (M2 phase). Strong curvature changes during the transition to the R phase were also observed for cantilevers coated with both types of films, but these were significantly higher in the case for the Cr-doped film. Curvature changes for temperature ranges outside the IMT region were small and attributed to differential thermal expansion between film and silicon substrate. From measured cantilever tip displacements in this post-transition range-for the undoped VO 2-coated microcantilevers-a rough estimate of 110 GPa was obtained for the effective Young's modulus for R-phase VO2. The substantially higher changes in resonant frequency and curvature for V1-xCr xO2-coated cant

关键词： Thin films

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Improving accuracy of authentication process via short free text using Bayesian network

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International Journal of computer Science Issues 2012年第2 2-3期9卷 10-16页

作者： Chantan, Charoon Sinthupinyo, Sukree Rungkasiri, Tippakorn Techopreneurship and Innovation management Program Graduate School Chulalongkorn University Bangkok Thailand Department of Computer Engineering Faculty of Engineering Chulalongkorn University Bangkok Thailand Faculty of Commerce and Accountancy Chulalongkorn University Bangkok Thailand

The internet security problems are a crucial threat to all users in the cyber world. One of the important problems about internet security concerned with user classification and authentication. However, there are multiple components to classify and authenticate users. The first one is using username/password and the second method is OTP or Token. This paper presents a novel method which cans Classify User via Short-text and IP Model (CUSIM) to grant or reject a user in authentication. CUSIM is a Bayesian network model which utilizes the Bayesian Inference to authenticate the user. The objective of this paper is to use the model based on conditional independent with the prior knowledge, i.e. Keystroke dynamics, location used to connect to the internet, and IP address. Finally, a numerical example is provided to illustrate the probability of incorrect authentication and use an algorithm of machine learning to test the efficiency and find out the accuracy, FAR, and FRR. The model results gave better value of accuracy, FAR, and FRR. © 2012 International Journal of computer Science Issues.

关键词： Bayesian networks

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Study on free electrons generated by concealed radioactive materials under controlled gaseous environment

Study on free electrons generated by concealed radioactive m...

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International Conference on Infrared and Millimeter Waves

作者： D. S. Kim W. S. Lee J. H. So E. M. Choi Physics Program in Graduate School of UNIST Ulsan National Institute of Science and Technology Ulsan South Korea Agency for Defense Development Daejeon South Korea Physics Program in Graduate School of UNIST School of Electrical and Computer Engineering Ulsan National Institute of Science and Technology Ulsan South Korea

We estimate the amount of free electrons generated by concealed radioactive materials using MCNP code. This simulation results show that the existence of radioactive sources enhances the number of photons and backgrou... 详细信息

关键词： Containers Photonics Steel Radioactive materials Gyrotrons Electric breakdown

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Genetic algorithms to automatic weld bead detection in double wall double image digital radiographs

Genetic algorithms to automatic weld bead detection in doubl...

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Congress on Evolutionary Computation

作者： Marcel Kroetz Tania M. Centeno Myriam R. Delgado Marcelo Felisberto Luís Alberto Lucas Leyza B. Dorini Vitor Fylyk Allan Vieira Graduate Program on Electrical Engineering and Computer Science (CPGEI) Federal University of Technology of Paraná (UTFPR) Brazil Academic Department of Eletronics (DAELN) Federal University of Technology of Paraná (UTFPR) Brazil

ISBN: (纸本)9781467315104

This paper presents a pioneering approach for weld bead detection in radiographic images obtained by the Double Wall Double Image (DWDI) technique. Such task constitutes an essential step for several high level processes, such as fully automatic flaw identification on welded joints. Sets of sample pixels, corresponding to candidate solutions provided by a genetic algorithm (GA), are compared to pre-defined synthetic weld bead and pipe models in an image matching procedure. The fitness of each set (individual) is evaluated based on a linear combination of its genotype (evaluated by a heuristic function) and phenotype. The evolutionary process automatically selects the best individual in the population and, thus, provides information such as position, orientation and dimension of the detected object. The proposed approach successfully detects pipes and weld beads in radiographic images of different complexities, encouraging future works.

关键词： Welding Genetic algorithms Radiography Equations Mathematical model Biological cells Joints

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Device Interoperability and Authentication for Telemedical Appliance based on the ISO/IEEE 11073 Personal Health Device (PHD) Standards

Device Interoperability and Authentication for Telemedical A...

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

作者： Luther Paul R. Caranguian Susan Pancho-Festin Luis G. Sison a graduate student in the MS Electrical Engineering (Instrumentation and Control) program of University of the Philippines Diliman. Festin is with the Department of Computer Science University of the Philippines Diliman. with the Electrical and Electronics Engineering Institute University of the Philippines Diliman.

ISBN: (纸本)9781424441198

In this study, we focused on the interoperability and authentication of medical devices in the context of telemedical systems. A recent standard called the ISO/IEEE 11073 Personal Health Device (X73-PHD) Standards addresses the device interoperability problem by defining common protocols for agent (medical device) and manager (appliance) interface. The X73-PHD standard however has not addressed security and authentication of medical devices which is important in establishing integrity of a telemedical system. We have designed and implemented a security policy within the X73-PHD standards. The policy will enable device authentication using Asymmetric-Key Cryptography and the RSA algorithm as the digital signature scheme. We used two approaches for performing the digital signatures: direct software implementation and use of embedded security modules (ESM). The two approaches were evaluated and compared in terms of execution time and memory requirement. For the standard 2048-bit RSA, ESM calculates digital signatures only 12% of the total time for the direct implementation. Moreover, analysis shows that ESM offers more security advantage such as secure storage of keys compared to using direct implementation. Interoperability with other systems was verified by testing the system with LNI Healthlink, a manager software that implements the X73-PHD standard. Lastly, security analysis was done and the system's response to common attacks on authentication systems was analyzed and several measures were implemented to protect the system against them.

关键词： Interoperability Telemedical Authentication

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