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Expressing Best Practices in (Risk) Analysis and Testing of Safety-Critical systems Using Patterns

Expressing Best Practices in (Risk) Analysis and Testing of ...

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IEEE International Conference on Software Reliability engineering Workshops (ISSRE Wksp)

作者： Wolfgang Herzner Sven Sieverding Omar Kacimi Eckard Böde Thomas Bauer Brian Nielsen Safety & Security Department AIT Austrian Institute of Technology Vienna Austria Transp. Dept. OFFIS - Inst. for Inf. Technol. Oldenburg Germany Transportation Department OFFIS - Institute for Information Technology Oldenburg Germany Dep. of Embedded Systems Quality Assurance Fraunhofer IESE Kaiserslautern Germany Department of Computer Science Aalborg University Denmark

The continuing pervasion of our society with safety-critical cyber-physical systems not only demands for adequate (risk) analysis, testing and verification techniques, it also generates growing experience on their use, which can be considered as important as the tools themselves for their efficient use. This paper introduces workflow patterns to describe such best practices in a systematic way that efficiently represents this knowledge, and also provides a way to relate different patterns, making them easier to identify and use, and cover as wide a range of experiences as possible. The value of the approach is demonstrated using some pattern examples from a collection developed in the Artemis-project MBAT. Finally, the paper presents a wiki-based approach for developing and maintaining the pattern collection.

关键词： Safety Analytical models Information services Electronic publishing Internet Best practices Testing

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Ubiquitous mobile instrumentation

Ubiquitous mobile instrumentation

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2013 ACM Conference on Ubiquitous Computing, UbiComp 2013

作者： Ferreira, Denzil Koehler, Christian Karapanos, Evangelos Kostakos, Vassilis Dep. Computer Science and Engineering University of Oulu Finland Human-Computer Interaction Institute Carnegie Mellon University United States Madeira Interactive Technologies Institute University of Madeira Portugal

ISBN: (纸本)9781450322157

Mobile phones allow us to reach people anywhere, at anytime. In addition to the benefits for end users, researchers and developers can also benefit from the powerful devices that participants carry on a daily basis. Collectively, mobile phones form a ubiquitous computer. Ubiquitous Mobile Instrumentation (UbiMI) workshop focuses on using mobile devices as instruments to collect data and conduct mobile user studies, to understand human-behavior, routines and gathering users' context. Copyright © 2013 ACM.

关键词： Cellular telephones

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Wavelet compression inspired implementation for high performances and low complexity ECG removal in wireless sEMG electrodes

Wavelet compression inspired implementation for high perform...

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IEEE International Conference on Electronics, Circuits and systems (ICECS)

作者： Mohamed El Fares Djellatou Daniel Massicotte Mounir Boukadoum Dep. Electrical and Computer Engineering LSSI Dep. Computer Science Université du Québec à Montréal

This study addresses the removal of electrocardiogram pulses (ECG) from surface electromyography signals (sEMG) in wireless sEMG electrodes. We describe a wavelet-compression inspired filtering technique in order to minimize the computational complexity required in wireless sEMG electrodes while providing higher filtering performance than when with standard means. Using semi-artificially prepared signals, we show that the discrete wavelet transform (DWT) enables a partial separation between the sEMG and ECG signals in time domain. Then, only the highly overlapped parts are fed into an adaptive noise cancellation (ANC) structure for lower computational complexity filtering. The simulation results confirm the improved noise rejection and the gain in computational complexity obtained with the proposed method.

关键词： Discrete wavelet transforms Electrocardiography Finite impulse response filters Least squares approximations Signal processing algorithms Complexity theory

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Feature selection methods in persian sentiment analysis

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18th International Conference on Application of Natural Language to Information systems, NLDB 2013

作者： Saraee, Mohamad Bagheri, Ayoub School of Computing Science and Engineering University of Salford Manchester United Kingdom Intelligent Database Data Mining and Bioinformatics Lab Electrical and Computer Engineering Dep. Isfahan University of Technology Isfahan Iran

ISBN: (纸本)9783642388231

With the enormous growth of digital content in internet, various types of online reviews such as product and movie reviews present a wealth of subjective information that can be very helpful for potential users. Sentiment analysis aims to use automated tools to detect subjective information from reviews. Up to now as there are few researches conducted on feature selection in sentiment analysis, there are very rare works for Persian sentiment analysis. This paper considers the problem of sentiment classification using different feature selection methods for online customer reviews in Persian language. Three of the challenges of Persian text are using of a wide variety of declensional suffixes, different word spacing and many informal or colloquial words. In this paper we study these challenges by proposing a model for sentiment classification of Persian review documents. The proposed model is based on stemming and feature selection and is employed Naive Bayes algorithm for classification. We evaluate the performance of the model on a collection of cellphone reviews, where the results show the effectiveness of the proposed approaches. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Feature Selection

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Image Deblurring Using Fast Best Kernel Retrieval

Image Deblurring Using Fast Best Kernel Retrieval

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Asian Conference on Pattern Recognition (ACPR)

作者： Hui-Yu Huang Wei-Chang Tsai Dep. of Computer Science and Information Engineering National Formosa University Taiwan

In this paper, we propose a kernel estimation algorithm using fast best kernel retrieval (FBKR) from spectral irregularities to achieve the deblurring. In daily life, when people take a photograph by any kinds of camera equipment, image motion blur caused by camera motion often happens. Camera motion during exposure will produce a blurred image, this kind of blur is often non-liner mode. Motion blur always causes the decline of image quality, as long as the users using the hand-held photography equipment often have a similar experience. Based on this reason, reconstructing a clear image from blurred image is the main objective in this paper. Reconstruction is an ill-pose problem. In current motion blur estimation algorithms, these algorithms usually use the recursive method to estimate motion blur kernel. However, recursive process is quite time-consuming. In order to enhance time-consuming, in this paper, based on iterative phase retrieval algorithm and normalized sparsity measure, we propose a fast and effective blur kernel retrieval algorithm, which can find the best kernel in a short time. Experiments verify that our method can effectively reduce the execution time and obtain the best motion blur kernel to deblur a deblurred image and keep the quality of image deblurring.

关键词： Kernel Estimation Clustering algorithms Image reconstruction Algorithm design and analysis Image edge detection Cameras

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Shape annotation by incremental semi-supervised fuzzy clustering

Shape annotation by incremental semi-supervised fuzzy cluste...

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10th International Workshop on Fuzzy Logic and Applications, WILF 2013

作者： Castellano, Giovanna Fanelli, Anna Maria Torsello, Maria Alessandra Computer Science Department University of Bari Via E. Orabona 4 - 70126 Bari Italy Dep. of Informatics Systems and Communication University of Milano Bicocca Viale Sarca 336 - 20126 Milano Italy

ISBN: (纸本)9783319031996

Automatic image annotation is an important and challenging task when managing large image collections. In this paper, we present an incremental approach for shape labeling, which is useful to image annotation when new sets of images are available during time. Every time new shape images are available, a semi-supervised fuzzy clustering algorithm is used to group shapes into a number of clusters by exploiting knowledge about classes expressed as a set of pre-labeled shapes. Each cluster is represented by a prototype that is manually labeled and used to annotate shapes. To capture the evolution of the image set, the previously discovered prototypes are added as pre-labeled shapes to the current shape set before clustering. The performance of the proposed incremental approach is evaluated on an image dataset from the fish domain, which is divided into chunks of data to simulate the progressive availability of shapes during time. © Springer International Publishing 2013.

关键词： Fuzzy clustering

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Infrared imaging and classification of neonates with necrotising enterocolitis

Infrared imaging and classification of neonates with necroti...

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World Congress on Medical Physics and Biomedical engineering

作者： Frize, Monique Nur, Ruqia Bariciak, Erika Herry, Christophe Systems and Computer Engineering Carleton University Ottawa ON Canada School of Electrical Engineering and Computer Science U. of Ottawa Ottawa ON Canada Dep. of Paediatrics University of Ottawa Ottawa ON Canada Hopital Rivière-des-Prairies Montreal QC Canada Ecole de Technologie Superieure Universite du Quebec Montreal QC Canada

ISBN: (纸本)9783642293047

Necrotising Enterocolitis (NEC) is a devastating intestinal disease associated with high rate of mortality and long-term morbidity. It can be successfully treated if diagnosed early, but there is no reliable way to detect NEC in early stages. Infrared imaging can detect tissue inflammation and thus can offer an early diagnostic tool for NEC. We enrolled infants with no clinical or radiographic signs of NEC, and a group consisting of infants with evidence of at least Bell's Stage 2 NEC. The infants underwent bedside infrared imaging for 60 seconds. Our dataset consisted of 20 normal infants and 9 infants with NEC. In infants with NEC, the upper-to-lower (UL) region temperatures differed significantly, whereas there was no significant difference in the UL quadrant temperatures in normal infants (p = 0.0037 Wilcoxon Rank-Sum and Kruskal-Wallis tests). We found no significant differences in left-to-right (LR) quadrant abdominal temperature profiles for both the normal and the NEC group. The performance of the Decision Tree classifier was highest when using the medians of UL quadrant temperatures;the mean specificity, sensitivity, and standard deviations for ten trials with medians and means were respectively: 90&+/-12%;78%+/-18%;88%+/-14%;69%+/-12%. We conclude that abdominal infrared imaging of preterm infants yields thermal profiles that can be analyzed and classified using statistical methods and decision trees to identify infants with and without NEC. Future work includes automating the analysis, conducting a prospective study to attempt detecting NEC at earlier stages, and assessing other image analysis approaches to enhance the overall performance of our methodology. © 2013 Springer-Verlag.

关键词： Statistical methods

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On-chip enucleation of oocyte using untetherd micro-robot with gripping mechanism

On-chip enucleation of oocyte using untetherd micro-robot wi...

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17th International Conference on Miniaturized systems for Chemistry and Life sciences, MicroTAS 2013

作者： Ichikawa, A. Sakuma, S. Shoda, T. Arai, F. Akagi, Satoshi Dept. of Mechatronics Engineering Faculty of Science and Technology Meijo Unibersity Japan Dep. of Mechanical Engineering Graduate School of Engineering Osaka University Japan Dept. of Micro-Nano Systems Engineering Nagoya University Japan Animal Breeding and Reproduction Research Division NARO Institute of Livestock and Grassland Science Japan

ISBN: (纸本)9781632666246

We developed a highly functional untethered micro-robot that can manipulate cells with high gripping force in a micro-fluidic chip. The robot has gripping mechanism which is actuated by magnetic power. A permanent magnet is attached at the center of the gripping mechanism, and an electrical magnet controls the position of the magnet from the bottom of the micro-fluidic chip. The open-close accuracy of the gripper is about 3.0 μm. We succeeded in cutting of zona pelucida of oocyte and enucleation by using this micro-robot.

关键词： Microfluidic chips

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Physical layer security vs. network layer secrecy: Who wins on the untrusted two-way relay channel?

Physical layer security vs. network layer secrecy: Who wins ...

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IEEE International Workshop on computer-Aided Modeling, Analysis, and Design of Communication Links and Networks, CAMAD

作者： Johannes Richter Elke Franz Sabrina Engelmann Stefan Pfennig Eduard A. Jorswieck Dep. of Electrical Engineering and Information Technology/Communications Laboratory Dep. of Computer Science/Privacy and Data Security Technische Universität Dresden Dresden Germany

We consider the problem of secure communications in a Gaussian two-way relay network where two nodes exchange confidential messages only via an untrusted relay. The relay is assumed to be honest but curious, i.e., an eavesdropper that conforms to the system rules and applies the intended relaying scheme. We analyze the achievable secrecy rates by applying network coding on the physical layer or the network layer and compare the results in terms of complexity, overhead, and efficiency. Further, we discuss the advantages and disadvantages of the respective approaches.

关键词： Physical layer Relays Network coding Lattices Payloads Cryptography

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On Rapid Releases and Software Testing

On Rapid Releases and Software Testing

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International Conference on Software Maintenance (ICSM)

作者： Mika V. Mäntylä Foutse Khomh Bram Adams Emelie Engström Kai Petersen Dep. of Computer Science and Engineering Aalto University Finland SWAT-MCIS École Polytechnique de Montréal Ouébec Canada Dep. of Computer Science Lund University Sweden School of Computing Blekinge Institute of Technology

ISBN: (纸本)9781467352185

Large open and closed source organizations like Google, Facebook and Mozilla are migrating their products towards rapid releases. While this allows faster time-to-market and user feedback, it also implies less time for testing and bug fixing. Since initial research results indeed show that rapid releases fix proportionally less reported bugs than traditional releases, this paper investigates the changes in software testing effort after moving to rapid releases. We analyze the results of 312,502 execution runs of the 1,547 mostly manual system level test cases of Mozilla Fire fox from 2006 to 2012 (5 major traditional and 9 major rapid releases), and triangulated our findings with a Mozilla QA engineer. In rapid releases, testing has a narrower scope that enables deeper investigation of the features and regressions with the highest risk, while traditional releases run the whole test suite. Furthermore, rapid releases make it more difficult to build a large testing community, forcing Mozilla to increase contractor resources in order to sustain testing for rapid releases.

关键词： computer bugs Measurement Software Software testing Google Browsers

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