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Simply fabricated all polymer electro-optic modulator

Simply fabricated all polymer electro-optic modulator

引用

IEEE Photonics Conference (IPC)

作者： David L.K. Eng Stephen T. Kozacik John P. Wilson Dylan D. Ross Shouyuan Shi Benjamin C. Olbricht Dennis W. Prather Department of Computer Software Engineering National University of Sciences and Technology NUST Islamabad Pakistan Department of Electrical & Computer Engineering Western University London ON Canada Department of Computing Science Thompson Rivers University Kamloops BC Canada

An all polymer EO modulator with a simple fabrication process using commercially available cladding materials has been designed, fabricated, and characterized. The result is a low V π modulator that is capable of being scaled up to larger scale production. Continued work on this project is being made towards designing an amplitude modulator structure and developing traveling wave transmission line electrodes that will utilize the low dispersion and THz response times of the π-conjugated OEOM system for high frequency operation.

关键词： Electrooptic modulators Electrooptical waveguides Fabrication Polymers

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Maintenance support in open source software projects

Maintenance support in open source software projects

引用

International Conference on Digital Information Management (ICDIM)

作者： Arif Raza Luiz Fernando Capretz Faheem Ahmed Department of Computer Software Engineering National University of Sciences and Technology NUST Islamabad Pakistan Department of Electrical & Computer Engineering Western University London ON Canada Department of Computing Science Thompson Rivers University Kamloops BC Canada

Easy and mostly free access to the Internet has resulted in the growing use of open source software (OSS). However, it is a common perception that closed proprietary software is still superior in areas such as software maintenance and management. The research model of this study establishes a relationship between maintenance issues (such as user requests and error handling) and support provided by open source software through project forums, mailing lists and trackers. To conduct this research, we have used a dataset consisting of 120 open source software projects, covering a wide range of categories. The results of the study show that project forums and mailing lists play a significant role in addressing user requests in open source software. However according to the empirical investigation, it has been explored that trackers are used as an effective medium for error reporting as well as user requests.

关键词： Open source software Maintenance engineering Correlation coefficient software maintenance Reliability Usability

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Fine-grained image classification using color exemplar classifiers

Fine-grained image classification using color exemplar class...

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14th Pacific-Rim Conference on Multimedia, PCM 2013

作者： Zhang, Chunjie Xiong, Wei Liu, Jing Zhang, Yifan Liang, Chao Huang, Qingming School of Computer and Control Engineering University of Chinese Academy of Sciences 100049 Beijing China National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences P.O. Box 2728 Beijing China National Engineering Research Center for Multimedia Software Wuhan University 430072 Wuhan China Key Lab of Intell. Info. Process Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9783319037301

The use of local features has demonstrated its effectiveness for many visual applications. However, local features are often extracted with gray images. This ignores the useful information within different color channels which eventually hinders the final performance, especially for fine-grained image classification. Besides, the semantic information of local features is too weak to be applied for high-level visual applications. To cope with these problems, in this paper, we propose a novel fine-grained image classification method by using color exemplar classifiers. For each image, we first decompose it into multiple color channels to take advantage of the color information. For each color channel, we represent each image with a response histogram which is generated by exemplar classifiers. Experiments on several public image datasets demonstrate the effectiveness of the proposed color exemplar classifier based image classification method. © Springer International Publishing Switzerland 2013.

关键词： Image classification

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Efficient public key cryptosystem resilient to key leakage chosen ciphertext attacks 1

引用

Cryptographers' Track at the RSA Conference 2013, CT-RSA 2013

作者： Liu, Shengli Weng, Jian Zhao, Yunlei Dept. of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Computer Science Emergency Technology Research Center of Risk Evaluation and Prewarning on Public Network Security Jinan University China Software School Fudan University Shanghai 201203 China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing 100093 China Shanghai Key Laboratory of Scalable Computing and Systems Shanghai China

ISBN: (数字)9783642360954

ISBN: (纸本)9783642360947

Leakage-resilient public key encryption (PKE) schemes are designed to resist "memory attacks", i.e., the adversary recovers the cryptographic key in the memory adaptively, but subject to constraint that the total amount of leaked information about the key is bounded by some parameter λ. Among all the IND-CCA2 leakage-resilient PKE proposals, the leakage-resilient version of the Cramer-Shoup cryptosystem (CS-PKE), referred to as the KL-CS-PKE scheme proposed by Naor and Segev in Crypto09, is the most practical one. But, the key leakage parameter λ and plaintext length m of KL-CS-PKE are subject to λ + m ≤ log q - ω(log κ), where κ is security parameter and q is the prime order of the group on which the scheme is based. Such a dependence between λ and m is undesirable. For example, when λ (resp., m) approaches to log q, m (resp., λ) approaches to 0. In this paper, we designed a new variant of CS-PKE that is resilient to key leakage chosen ciphertext attacks. Our proposal is λ ≤ log q - ω(log κ) leakage-resilient, and the leakage parameter λ is independent of the plaintext space that has the constant size q (exactly the same as that in CS-PKE). The performance of our proposal is almost as efficient as the original CS-PKE. As far as we know, this is the first leakage-resilient CS-type cryptosystem whose plaintext length is independent of the key leakage parameter, and is also the most efficient IND-CCA2 PKE scheme resilient to up to log q - ω(log κ) leakage. © 2013 Springer-Verlag.

关键词： Public key cryptography

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A novel secure key paring protocol for RF4CE ubiquitous smart home systems

A novel secure key paring protocol for RF4CE ubiquitous smar...

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作者： Han, Kyusuk Kim, Jangseong Shon, Taeshik Ko, Daesik University of Michigan 2260 Hayward St Ann Arbor MI 48109-2121 United States Cloud Computing Lab Software Center Samsung Electronics Suwon 443-742 Korea Republic of Department of Information Computer Engineering Ajou University San 5 Woncheon-Dong Yeongtong-Gu Suwon 443-749 Korea Republic of Department of Electronic Engineering Mokwon University Mokwon Gil-21 Doan-dong Seo-gu Daejeon 302-729 Korea Republic of

The Radio Frequency for Consumer Electronics (RF4CE) is developed to support the rapid increasing demand of bi-directional communication and remote control functionalities in CE market such as TV, home theater. However, current security model in RF4CE standard has potential weakness that transmission of initial key seeds is operated via unencrypted air interface. In this paper, we propose a secure key agreement protocol that uses pre-shared information between consumer devices and manufacturers and controllers receive the information by communication with manufacturers. © 2012 Springer-Verlag London Limited.

关键词： Remote control

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How Does Context Affect the Distribution of software Maintainability Metrics?

How Does Context Affect the Distribution of Software Maintai...

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International Conference on software Maintenance (ICSM)

作者： Feng Zhang Audris Mockus Ying Zou Foutse Khomh Ahmed E. Hassan School of Computing Queen's University Canada Department of Software Avaya Labs Research NJ USA Department of Electrical and Computer Engineering Queen's University Canada Polytechnique Montreal Montreal QC CA

ISBN: (纸本)9781467352185

software metrics have many uses, e.g., defect prediction, effort estimation, and benchmarking an organization against peers and industry standards. In all these cases, metrics may depend on the context, such as the programming language. Here we aim to investigate if the distributions of commonly used metrics do, in fact, vary with six context factors: application domain, programming language, age, lifespan, the number of changes, and the number of downloads. For this preliminary study we select 320 nontrivial software systems from Source Forge. These software systems are randomly sampled from nine popular application domains of Source Forge. We calculate 39 metrics commonly used to assess software maintainability for each software system and use Kruskal Wallis test and Mann-Whitney U test to determine if there are significant differences among the distributions with respect to each of the six context factors. We use Cliff's delta to measure the magnitude of the differences and find that all six context factors affect the distribution of 20 metrics and the programming language factor affects 35 metrics. We also briefly discuss how each context factor may affect the distribution of metric values. We expect our results to help software benchmarking and other software engineering methods that rely on these commonly used metrics to be tailored to a particular context.

关键词： software systems Measurement Context Benchmark testing Computer languages Complexity theory

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Formal Modelling and Analysis of AODV

Formal Modelling and Analysis of AODV

引用

IEEE International Conference on engineering of Complex Computer Systems

作者： Xiaofeng Wu J.W. Sanders Huibiao Zhu East China Normal University Shanghai CN African Institute for Mathematical Sciences South Africa Shanghai Key Laboratory of Trustworthy Computing Software Engineering Institute East China Normal University Shanghai China

Wireless systems have a wide range of applications recently. To explore complex features of such systems, formalisms are proposed to specify and reason about them. This paper presents a case study of routing protocol in wireless networks. We formalize the route discovery process of AODV routing protocol using Object-Z. Network topology and local variables of nodes are defined by relations and functions. The broadcast communication is modelled by operations which change local variables of the sender and all of its connected receivers simultaneously. We show the proof of loop freedom property for established routes based on the specification. Further, the specification is modified by adding mobility of nodes and loop freedom under a dynamic network topology is discussed, showing the scalability of our approach.

关键词： Routing protocols Routing Receivers Ad hoc networks Analytical models Network topology Mobile computing

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Identifying Failure-Inducing Combinations Using Tuple Relationship

Identifying Failure-Inducing Combinations Using Tuple Relati...

引用

IEEE International Conference on software Testing Verification and Validation Workshop, ICSTW

作者： Xintao Niu Changhai Nie Yu Lei Alvin T.S. Chan State Key Laboratory for Novel Software Technology Nanjing University China Department of Computer Science and Engineering University of Texas Arlington USA Department of computing Hong Kong Polytechnic University Hong Kong China

ISBN: (纸本)9781479913244

Combinatorial testing (CT) aims at detecting interaction failures between parameters in a system. Identifying the failure-inducing combinations of a failing test configuration can help developers find the cause of this failure. However, most studies in CT focus on detecting the failures rather than identifying failure-inducing combinations. In this paper, we propose the notion of a tuple relationship tree (TRT) to describe the relationships among all the candidate parameter interactions. TRT reduces additional test configurations that need to be generated in the fault localization process, and it also provides a clear view of all possible candidate interactions. As a result, our approach will not omit any possible interaction that could be the cause of a failure. In particular, we can identify multiple failure-inducing combinations that overlap with each other. Moreover, we extend our approach to handle the case where additional failure-inducing combinations may be introduced by newly generated test configurations.

关键词： Testing Pediatrics Indexes Fault diagnosis software Arrays Educational institutions

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Update-efficient regenerating codes with minimum per-node storage

Update-efficient regenerating codes with minimum per-node st...

引用

IEEE International Symposium on Information Theory

作者： Yunghsiang S. Han Hung-Ta Pai Rong Zheng Pramod K. Varshney Department of Electrical Engineering National Taiwan University of Science and Technology Taipei Taiwan Department of communication Engineering National Taipei University Taipei Taiwan Department of Computing and Software McMaster University Hamilton ONT Canada Department of EECS Syracuse University Syracuse USA

ISBN: (纸本)9781479904440

Regenerating codes provide an efficient way to recover data at failed nodes in distributed storage systems. It has been shown that regenerating codes can be designed to minimize the per-node storage (called MSR) or minimize the communication overhead for regeneration (called MBR). In this work, we propose a new encoding scheme for [n, d] error-correcting MSR codes that generalizes our earlier work on error-correcting regenerating codes. We show that by choosing a suitable diagonal matrix, any generator matrix of the [n, α] Reed-Solomon (RS) code can be integrated into the encoding matrix. Hence, MSR codes with the least update complexity can be found. An efficient decoding scheme is also proposed that utilizes the [n, α] RS code to perform data reconstruction. The proposed decoding scheme has better error correction capability and incurs the least number of node accesses when errors are present.

关键词： Decoding Generators Encoding Bandwidth Maintenance engineering Vectors

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Manifold-constrained regularization for variable selection in envrionmental microbiomic data

Manifold-constrained regularization for variable selection i...

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IEEE International Conference on Bioinformatics and Biomedicine (BIBM)

作者： Xingpeng Jiang Xiaohua Hu Weiwei Xu Yongli Wang College of Computing and Informatics Drexel University Philadelphia PA USA International School of Software Wuhan University Wuhan Hubei China School of Computer Science & Engineering Nanjing University of Science & Technology Nanjing Jiangsu China

Current data mining and statistical methods to extract patterns and relationships in microbiomic data are often based on several assumptions such as Euclidean, linear, continuous and metric space which may not be the true space of microbiomic data. For example, the microbial profiles (functional and taxonomic classifications) are often correlated in a hierarchical style. These assumptions prevent discovering the true relationships in microbiomic data analysis. Thus, it is urgent to develop new computational methods to overcome these assumptions and consider the microbiomic data properties in the analysis procedure. In this study, we will propose novel variable selection method based on manifold-constrained regularization (McRe). Considering the nonlinear and correlation structure of data, McRe get improved results in simulation data. The method is also applied to a microbiomic dataset.

关键词： Laplace equations Manifolds DNA Hidden Markov models Data models Proteins Educational institutions

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