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Security loophole in free-space quantum key distribution due to spatial-mode detector-efficiency mismatch

Physical Review A 2015年第6期91卷 062301-062301页

作者： Shihan Sajeed Poompong Chaiwongkhot Jean-Philippe Bourgoin Thomas Jennewein Norbert Lütkenhaus Vadim Makarov Institute for Quantum Computing University of Waterloo Waterloo Ontario N2L 3G1 Canada Department of Electrical and Computer Engineering University of Waterloo Waterloo Ontario N2L 3G1 Canada Department of Physics and Astronomy University of Waterloo Waterloo Ontario N2L 3G1 Canada Quantum Information Science Program Canadian Institute for Advanced Research Toronto Ontario M5G 1Z8 Canada

In free-space quantum key distribution (QKD), the sensitivity of the receiver's detector channels may depend differently on the spatial mode of incoming photons. Consequently, an attacker can control the spatial mode to break security. We experimentally investigate a standard polarization QKD receiver and identify sources of efficiency mismatch in its optical scheme. We model a practical intercept-and-resend attack and show that it would break security in most situations. We show experimentally that adding an appropriately chosen spatial filter at the receiver's entrance may be an effective countermeasure.

关键词： Quantum cryptography

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A portfolio optimization approach to selection in multiobjective evolutionary algorithms

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2014年 8672卷 672-681页

作者： Yevseyeva, Iryna Guerreiro, Andreia P. Emmerich, Michael T. M. Fonseca, Carlos M. Centre for Cybercrime and Computer Security School of Computing Science Newcastle University Newcastle upon TyneNE1 7RU United Kingdom CISUC Department of Informatics Engineering University of Coimbra Pólo II Pinhal de Marrocos Coimbra3030-290 Portugal Leiden Institute of Advanced Computer Science Leiden University Niels Bohrweg 1 2333 CA Leiden Netherlands

In this work, a new approach to selection in multiobjective evolutionary algorithms (MOEAs) is proposed. It is based on the portfolio selection problem, which is well known in financial management. The idea of optimizing a portfolio of investments according to both expected return and risk is transferred to evolutionary selection, and fitness assignment is reinterpreted as the allocation of capital to the individuals in the population, while taking into account both individual quality and population diversity. The resulting selection procedure, which unifies parental and environmental selection, is instantiated by defining a suitable notion of (random) return for multiobjective optimization. Preliminary experiments on multiobjective multidimensional knapsack problem instances show that such a procedure is able to preserve diversity while promoting convergence towards the Pareto-optimal front. © Springer International Publishing Switzerland 2014.

关键词： Multiobjective optimization

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Characterisation of knowledge incorporation into solution models for the meal planning problem 3

Characterisation of knowledge incorporation into solution mo...

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3rd International Symposium on Foundations of Health Information Engineering and Systems, FHIES 2013

作者： Zanamwe, Ngonidzashe Dube, Kudakwashe Thomson, Jasmine S. Mtenzi, Fredrick J. Hapanyengwi, Gilford T. Computer Science Department University of Zimbabwe Zimbabwe School of Engineering and Advanced Technology Massey University New Zealand Institute of Food Nutrition and Human Health Massey University New Zealand School of Computing College of Sciences and Health Dublin Institute of Technology Ireland

ISBN: (纸本)9783642539558

This paper is part of work aimed at investigating an approach to knowledge incorporation into solution models of the Meal Planning Problem (MPP) for use in mobile web-based HIV/AIDS nutrition therapy management within the context of developing countries, particularly, in Sub-Saharan Africa. This paper presents a characterisation of the incorporation of knowledge into the models for the MPP. The characterisation is important for assessing the extent to which MPP models can be adapted for use in different clinical problems with different nutrition guideline knowledge and in different regions of the world with differently customised versions of the guidelines. The characterisation was applied to thirty one works in the literature on MPP models. The main outcome of the application of the characterisation was the finding that the existing MPP models do not provide for the incorporation of nutrition guideline knowledge as first class concepts with identifiable and manageable structures, which makes almost impossible the transfer of knowledge from health experts to patients and from one region of the world to another. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Linear programming

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A Graph-Based 3D IC Partitioning Technique

A Graph-Based 3D IC Partitioning Technique

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IEEE computer Society Annual Symposium on VLSI

作者： Sabyasachee Banerjee Subhashis Majumder Bhargab B. Bhattacharya Department of Computer Science and Engineering Heritage Institute of Technology Kolkata Advanced Computing & Microelectronics Unit Indian Statistical Institute Kolkata

Netlist partitioning is an important part of the physical design of 3D IC chips. Each subcircuit corresponding to a partition is subsequently assigned to a suitable device layer in the design phase. This paper proposes a netlist partitioning technique that intends to minimize the number of inter-layer interconnections while maintaining the area constraints. This, in turn, will minimize the area and cost associated with the Through-Silicon Vias (TSVs) needed in the design. The proposed method starts with an BFS-based initial solution and then improves iteratively using a heuristic. Experimental results demonstrate that by reassigning some modules to other layers, our algorithm could achieve up to 45% reduction in the number of TSVs on several benchmark circuits compared to earlier approaches. The resulting increase in floor area due to movement of modules a cross layers, is almost compensated by the decrease in TSV-area. Thus while satisfying the area-constraints, it allows us to reduce the number of TSVs as well as the IR-drop and delay associated with the vias.

关键词： Partitioning algorithms Three-dimensional displays Through-silicon vias Algorithm design and analysis Benchmark testing Time complexity

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ILPS: Indoor localization using physical maps and smartphone sensors

ILPS: Indoor localization using physical maps and smartphone...

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IEEE International Symposium on World of Wireless Mobile and Multimedia Networks (WoWMoM)

作者： Ahmad Abadleh Sangyup Han Soon J. Hyun Ben Lee Myungchul Kim Department of Computer Science Korea Advanced Institute of Science and Technology Daejeon Republic of Korea School of Electrical Engineering and Computer Science Oregon State University Corvallis OR USA

Indoor positioning and tracking services are garnering more attention. Recently, several state-of-the-art localization techniques have been proposed that use radio maps or the sensors readily available on smartphones. This paper presents a localization system called Indoor Localization using Physical maps and smartphone Sensors (ILPS), which is based on a building blueprint database and smartphone sensors. The blueprint database and access points (APs) provide a number of reference points that can be used to acquire the initial position and adjust the user position each time a reference point is detected. The proposed method is implemented on a smartphone and tested in real indoor environments. The experiments with ILPS demonstrate that using a static blueprint will avoid the costly database updates that are usually required in other approaches due to signal attenuation. Furthermore, ILPS performs better than existing work in term of accuracy and effectiveness for indoor localization.

关键词： Floors Sensors Databases Elevators Acceleration Accelerometers

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Framework and modular infrastructure for automation of architectural adaptation and performance optimization for HPC systems 1

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29th International Supercomputing Conference, ISC 2014

作者： Fialho, Leonardo Browne, James Institute for Computational Engineering and Sciences Austin TX 78712 United States Texas Advanced Computing Center Austin TX 78712 United States Department of Computer Science Austin TX 78712 United States University of Texas at Austin Austin TX 78712 United States

ISBN: (数字)9783319075181

ISBN: (纸本)9783319075174

High performance systems have complex, diverse and rapidly evolving architectures. The span of applications, workloads, and resource use patterns is rapidly diversifying. Adapting applications for efficient execution on this spectrum of execution environments is effort intensive. There are many performance optimization tools which implement some or several aspects of the full performance optimization task but almost none are comprehensive across architectures, environments, applications, and workloads. This paper presents, illustrates, and applies a modular infrastructure which enables composition of multiple open-source tools and analyses into a set of workflows implementing comprehensive end-to-end optimization of a diverse spectrum of HPC applications on multiple architectures and for multiple resource types and parallel environments. It gives results from an implementation on the Stampede HPC system at the Texas advanced computing Center where a user can submit an application for optimization using only a single command line and get back an at least, partially optimized program without manual program modification for two different chips. Currently, only a subset of the possible optimizations is completely automated but this subset is rapidly growing. Case studies of applications of the workflow are presented. The implementations currently available for download as the PerfExpert tool version 4.0 supports both Sandy Bridge and Intel Phi chips. © Springer International Publishing Switzerland 2014.

关键词： Application programs

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Ote-Ocr Based Text Recognition and Extraction from Video Frames

Ote-Ocr Based Text Recognition and Extraction from Video Fra...

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IEEE International Conference on Intelligent Systems and Control

作者： Shashank Shetty Arun S. Devadiga S. Sibi Chakkaravarthy K. A. Varun Kumar Department of Computer Science and Engineering Centre for Development of Advanced Computing (CDAC) Department of Computer Science and Engineering NMAM Institute of Technology Department of Computer Science and Engineering Vel Tech Dr.RR & Dr.SR Technical University

ISBN: (纸本)9781479938384

The goal of this paper is to provide a new method to detect and recognize the text from the video frames. The task performed is divided into three step approach that combines the text detection and text recognition from the video frame. The video frame creation involves in dividing the video into an individual frames. The individual frame is grabbed and passed to the rest two phases. The text detection is a two-step approach, which involves text localization phase and the text verification phase. The text recognition involves in text verification phase and the optical character recognition phase. The final outcome of this paper is the detection of the text from the video frames in a word file. Experimental results demonstrating the proposed approach was also included, which shows the accuracy level of Optical character recognition (OCR) in terms of text extraction.

关键词： OCR Localization Text Extraction Text Verification Text recognition Video frame

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Measuring phase derivatives in digital holographic interferometry

Measuring phase derivatives in digital holographic interfero...

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Digital Holography and Three-Dimensional Imaging, DH 2014

作者： Rajshekhar, Gannavarpu Rastogi, Pramod Quantitative Light Imaging Laboratory Department of Electrical and Computer Engineering Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign Urbana-61801 IL United States Applied Computing and Mechanics Laboratory Ecole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland

We discuss pseudo Wigner-Ville distribution based phase derivative estimation techniques in digital holographic interferometry. These techniques address the major challenges associated with measuring phase derivatives... 详细信息

ISBN: (纸本)9781557523082

关键词： Wigner-Ville distribution

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Study of [Formula: see text] and [Formula: see text] production in [Formula: see text] collisions at [Formula: see text] and search for anomalous quartic gauge couplings with the ATLAS experiment

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The European physical journal. C, Particles and fields 2017年第9期77卷 646页

作者： M Aaboud G Aad B Abbott O Abdinov B Abeloos S H Abidi O S AbouZeid N L Abraham H Abramowicz H Abreu R Abreu Y Abulaiti B S Acharya S Adachi L Adamczyk J Adelman M Adersberger T Adye A A Affolder T Agatonovic-Jovin C Agheorghiesei J A Aguilar-Saavedra S P Ahlen F Ahmadov G Aielli S Akatsuka H Akerstedt T P A Åkesson E Akilli A V Akimov G L Alberghi J Albert P Albicocco M J Alconada Verzini S C Alderweireldt M Aleksa I N Aleksandrov C Alexa G Alexander T Alexopoulos M Alhroob B Ali M Aliev G Alimonti J Alison S P Alkire B M M Allbrooke B W Allen P P Allport A Aloisio A Alonso F Alonso C Alpigiani A A Alshehri M I Alstaty B Alvarez Gonzalez D Álvarez Piqueras M G Alviggi B T Amadio Y Amaral Coutinho C Amelung D Amidei S P Amor Dos Santos S Amoroso G Amundsen C Anastopoulos L S Ancu N Andari T Andeen C F Anders J K Anders K J Anderson A Andreazza V Andrei S Angelidakis I Angelozzi A Angerami A V Anisenkov N Anjos A Annovi C Antel M Antonelli A Antonov D J Antrim F Anulli M Aoki L Aperio Bella G Arabidze Y Arai J P Araque V Araujo Ferraz A T H Arce R E Ardell F A Arduh J-F Arguin S Argyropoulos M Arik A J Armbruster L J Armitage O Arnaez H Arnold M Arratia O Arslan A Artamonov G Artoni S Artz S Asai N Asbah A Ashkenazi L Asquith K Assamagan R Astalos M Atkinson N B Atlay K Augsten G Avolio B Axen M K Ayoub G Azuelos A E Baas M J Baca H Bachacou K Bachas M Backes M Backhaus P Bagnaia M Bahmani H Bahrasemani J T Baines M Bajic O K Baker E M Baldin P Balek F Balli W K Balunas E Banas A Bandyopadhyay Sw Banerjee A A E Bannoura L Barak E L Barberio D Barberis M Barbero T Barillari M-S Barisits J T Barkeloo T Barklow N Barlow S L Barnes B M Barnett R M Barnett Z Barnovska-Blenessy A Baroncelli G Barone A J Barr L Barranco Navarro F Barreiro J Barreiro Guimarães da Costa R Bartoldus A E Barton P Bartos A Basalaev A Bassalat R L Bates S J Batista J R Batley M Battaglia M Bauce F Bauer H S Bawa J B Beacham M D Beattie T Beau P H Beauchemin P Bechtle H P Beck H C Beck K Becker M Becker M Beckingham C Becot A J Beddall A Beddall Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco. CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France. Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman OK USA. Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan. LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France. Department of Physics University of Toronto Toronto ON Canada. Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz CA USA. Department of Physics and Astronomy University of Sussex Brighton UK. Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel. Department of Physics Technion: Israel Institute of Technology Haifa Israel. Center for High Energy Physics University of Oregon Eugene OR USA. Department of Physics Stockholm University Stockholm Sweden. The Oskar Klein Centre Stockholm Sweden. INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy. ICTP Trieste Italy. International Center for Elementary Particle Physics and Department of Physics The University of Tokyo Tokyo Japan. Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland. Department of Physics Northern Illinois University DeKalb IL USA. Fakultät für Physik Ludwig-Maximilians-Universität München Munich Germany. Particle Physics Department Rutherford Appleton Laboratory Didcot UK. Institute of Physics University of Belgrade Belgrade Serbia. Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania. Laboratório de Instrumentação e Física Experimental de Partículas-LIP Lisbon Portugal. Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain. Department of Physics Boston University Boston MA USA. Joint Institute for Nuclear Research JINR Dubna Dubna Russia. INFN Sezione di Roma Tor Vergata Rome Italy. Dipartimento di Fisica Università di Roma

This paper presents a study of and triboson production using events from proton-proton collisions at a centre-of-mass energy of recorded with the ATLAS detector at the LHC and corresponding to an integrated luminosity of 20.2 fb . The production cross-section is determined using a final state containing an electron, a muon, a photon, and neutrinos ( ). Upper limits on the production cross-section of the final state and the and final states containing an electron or a muon, two jets, a photon, and a neutrino ( or ) are also derived. The results are compared to the cross-sections predicted by the Standard Model at next-to-leading order in the strong-coupling constant. In addition, upper limits on the production cross-sections are derived in a fiducial region optimised for a search for new physics beyond the Standard Model. The results are interpreted in the context of anomalous quartic gauge couplings using an effective field theory. Confidence intervals at 95% confidence level are derived for the 14 coupling coefficients to which and production are sensitive.

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SHREC'14 track: Extended large scale sketch-based 3D shape retrieval 7

SHREC'14 track: Extended large scale sketch-based 3D shape r...

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7th Eurographics Workshop on 3D Object Retrieval, 3DOR 2014

作者： Li, B. Lu, Y. Li, C. Godil, A. Schreck, T. Aono, M. Burtscher, M. Fu, H. Furuya, T. Johan, H. Liu, J. Ohbuchi, R. Tatsuma, A. Zou, C. Department of Computer Science Texas State University San Marcos United States Information Technology Laboratory National Institute of Standards and Technology Gaithersburg United States Computer and Information Science University of Konstanz Konstanz Germany Department of Computer Science and Engineering Toyohashi University of Technology Toyohashi Japan School of Creative Media City University of Hong Kong Hong Kong Hong Kong Computer Science and Engineering Department University of Yamanashi Yamanashi Japan Visual Computing Fraunhofer IDM NTU Singapore Singapore Media Laboratory Huawei Technologies Co. Ltd. Shenzhen China Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China

ISBN: (纸本)9783905674583

Large scale sketch-based 3D shape retrieval has received more and more attentions in the community of content-based 3D object retrieval. The objective of this track is to evaluate the performance of different sketch-based 3D model retrieval algorithms using a large scale hand-drawn sketch query dataset on a comprehensive 3D model dataset. The benchmark contains 12,680 sketches and 8,987 3D models, divided into 171 distinct classes. In this track, 12 runs were submitted by 4 groups and their retrieval performance was evaluated using 7 commonly used retrieval performance metrics. We hope that this benchmark, the comparative evaluation results and the corresponding evaluation code will further promote the progress of this research direction for the 3D model retrieval community. © The Eurographics Association 2014.

关键词： Self organizing maps

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