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Lecture Notes in computer science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2014年 8868卷 111-114页

作者： Orozco, Javier Santos, Rodrigo Ochoa, Sergio Ordinez, Leo Messeguer, Roc Baloian, Nelson Dep. Electrical Engineering and Computers IIIE UNS-CONICET Argentina Computer Science Department Universidad de Chile Chile Computer Science Department Universidad Politecnica de Catalunya Spain

ISBN: (纸本)9783319131047

Falls in older adults are not only frequent but also potentially disabling for them. Detecting and preventing these falls have an important impact in the life of the elderly people. This paper presents the architecture of a pervasive system designed to perform early detection of older adults in risk of falling or fell down. The system notifies the appropriate people or healthcare organizations in case of detecting a fall of the monitored person. This monitoring process produces minimum disruption in the life style of the elderly. © Springer International Publishing Switzerland 2014.

关键词： Accident prevention

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Energy-efficient HTTP adaptive streaming for high-quality video over HetNets

Energy-efficient HTTP adaptive streaming for high-quality vi...

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IEEE International Symposium on Personal, Indoor and Mobile Radio communications (PIMRC)

作者： Yunmin Go Oh Chan Kwon Hwanjun Song Div. of IT Convergence Enaineerina POSTECH (Pohang University of Science and Technolozv) Pohanz Republic of Korea Samsung Electronics Suwon Gyeonggi-do KR Dep. of Computer Science Engineering POSTECH (Pohang University of Science and Technology) Pohang Republic of Korea

In this work, we propose an energy-efficient HTTP adaptive streaming for high-quality video over heterogeneous networks (HetNets). To support high-quality video and overcome the limitations of a single network, the proposed system downloads the video segments by concurrently using the HetNets. In the proposed system, the segment bitrate, number of requested segments, network sleep time, and size of requested data through each wireless network are determined adaptively to provide seamless high-quality video streaming in an energy and cost efficient way. The proposed system is fully implemented in an Android-based mobile device and tested in an actual wireless network environments.

关键词： Artificial neural networks Land mobile radio Business Energy consumption Adaptive systems Heterogeneous networks Energy efficiency

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The YCB object and Model set: Towards common benchmarks for manipulation research

The YCB object and Model set: Towards common benchmarks for ...

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International Conference on Advanced Robotics (ICAR)

作者： Berk Calli Arjun Singh Aaron Walsman Siddhartha Srinivasa Pieter Abbeel Aaron M. Dollar Dep. of Mechanical Engineering and Materials Science Yale University New Haven CT USA Department of Computer Science University of California at Berkeley Berkeley CA USA Robotics Institute Carnegie Mellon University Pittsburgh PA USA

In this paper we present the Yale-CMU-Berkeley (YCB) Object and Model set, intended to be used for benchmarking in robotic grasping and manipulation research. The objects in the set are designed to cover various aspects of the manipulation problem; it includes objects of daily life with different shapes, sizes, textures, weight and rigidity, as well as some widely used manipulation tests. The associated database provides high-resolution RGBD scans, physical properties and geometric models of the objects for easy incorporation into manipulation and planning software platforms. A comprehensive literature survey on existing benchmarks and object datasets is also presented and their scope and limitations are discussed. The set will be freely distributed to research groups worldwide at a series of tutorials at robotics conferences, and will be otherwise available at a reasonable purchase cost.

关键词： Benchmark testing Robots Shape Grasping Databases Planning Solid modeling

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Evaluation of context models to code wavelet-transformed hyperspectral images

Evaluation of context models to code wavelet-transformed hyp...

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作者： Aulí-Llinàs, Francesc Enfedaque, Pablo Serra-Sagristà, Joan Sanchez, Victor Dep. of Information and Communications Engineering Universitat Autónoma de Barcelona Spain Dep. of Computer Science University of Warwick United Kingdom

ISBN: (纸本)9781479957514

Context modeling is key in wavelet-based image coding schemes to achieve competitive coding performance. Commonly, context models are devised for a particular coding system and are employed for many different types of images. The aim of this work is to evaluate the suitability of three well-known context models for coding hyperspectral images, without focusing on a particular wavelet-based coding system. To do so, an entropy-based measure defined using the mechanisms utilized by modern image codecs is employed. The experimental results assess the appropriateness of the context models considering different coding rates and transform strategies. They reveal that some widely-used context models may not be as adequate as it is generally thought. The hints provided by this analysis may help to design simpler and more efficient wavelet-based codecs for hyperspectral images. © 2014 IEEE.

关键词： Wavelet transforms

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A model-driven approach to broaden the detection of software performance antipatterns at runtime 11

A model-driven approach to broaden the detection of software...

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11th International Workshop on Formal engineering Approaches to Software Components and Architectures, FESCA 2014

作者： Di Marco, Antinisca Trubiani, Catia Dep. of Computer Engineering and Science and Mathematics University of L'Aquila L'Aquila Italy

Performance antipatterns document bad design patterns that have negative influence on system performance. In our previous work we formalized such antipatterns as logical predicates that build on four different views: (i) the static view that captures the software elements (e.g. classes, components) and the static relationships among them;(ii) the dynamic view that represents the interaction (e.g. messages) that occurs between the software elements to provide system functionalities;(iii) the dep.oyment view that describes the hardware elements (e.g. processing nodes) and the mapping of software resources onto hardware platforms;(iv) the performance view that collects a set of specific performance indices. In this paper we present a lightweight infrastructure that enables the detection of software performance antipatterns at runtime through the monitoring of specific performance indices. The proposed approach precalculates the logical predicates of antipatterns and identifies the ones whose static, dynamic and dep.oyment sub-predicates occur in the current system configuration and brings at runtime the verification of performance sub-predicates. The proposed infrastructure leverages model-driven techniques to generate probes for monitoring the performance sub-predicates thus to support the detection of antipatterns at runtime. © A. Di Marco, C. Trubiani.

关键词： Optimal systems

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Effects of dep.sition temperature on the structural, optical, and electrical properties of hydrogenated of Ga-doped ZnO film

Effects of deposition temperature on the structural, optical...

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Microoptics Conference

作者： Jung-Ruey Tsai Neng-Fu Shih Rong-Hwei Yeh Dep. of Photonics and Communication Engineering Asia University Dept. of Electronic Engineering Hsiuping University of Science and Technology

ISBN: (纸本)9781479917297

GZO thin films were prepared on a glass substrate by dc magnetron sputtering with hydrogen at various dep.sition temperatures (T_d). As a result of the incorporation of hydrogen atoms that acted as shallow donors, the carrier concentration of each film initially increased when T_d increased from 25℃ to 175℃ but then decreased as T_d further increased. Film mobility and carrier concentration exhibited the similar trend with dep.sition temperature. The lowest resistivity, 8.1 × 10~(-4) Ω·cm, was obtained for the film grown at 175℃, which has a carrier concentration of 1.1 × 10~(21) cm~(-3).

关键词： Films Hydrogen Zinc oxide II-VI semiconductor materials Conductivity Sputtering Stress

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A real time 3D sensor for smart cameras 14

A real time 3D sensor for smart cameras

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8th ACM/IEEE International Conference on Distributed Smart Cameras, ICDSC 2014

作者： Mattoccia, Stefano Macri, Paolo Dep. of Computer Science and Engineering University of Bologna Viale Risorgimento 2 Bologna40136 Italy

ISBN: (纸本)9781450329255

Thank to the widespread diffusion of RGBD sensing devices based on active technologies, in recent years, many research and industrial applications have taken advantage of reliable cues computed from dense dep.h data. However, although these sensors can be very effective in many circumstances, they are not always well suited for outdoor environments and can also interfere with each other when sensing the same area. On the other hand, traditional systems based on passive stereo vision technology, due to their computational/energy requirements, reliability, size, cost etc, have been, so far, mostly confined to research projects. Nevertheless, recent advances in computation architectures and algorithms enable to overcome most of these issues and, in this paper, we describe the architecture and the processing pipeline of an effective RGBD sensor based on stereo vision suited for real time applications. This sensor allows us to infer, in indoor and outdoor environments, dense and accurate dep.h maps computed according to state-of-art algorithms and with minimal energy requirements that fit with typical constraints of smart camera systems.

关键词： Field programmable gate arrays (FPGA)

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Adaptive block SSA based ANC implementation for high performances ECG removal from sEMG signals 27

Adaptive block SSA based ANC implementation for high perform...

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2014 IEEE 27th Canadian Conference on Electrical and computer engineering, CCECE 2014

作者： El Fares Djellatou, Mohamed Massicotte, Daniel Boukadoum, Mounir Université du Québec À Trois-Rivières Dep. Electrical and Computer Engineering LSSI Canada Université du Québec À Montréal Dep. Computer Science Canada

ISBN: (纸本)9781479930999

This study addresses electrocardiogram (ECG) pulses removal from surface electromyography (sEMG) recordings. We describe a block singular spectrum analysis based adaptive noise canceler (BSSA-ANC) in order to enhance the filtering performance of sEMG signals. The proposed method distinguishes itself by adapting the eigenvalues of every input block data, using an adaptive noise canceling (ANC) filter based on error gradient minimization, during the grouping stage of the well-known SSA technique. Using semi-artificially prepared signals, we demonstrate that the least mean square (LMS) when combined with the proposed technique provides higher filtering performances than with standard mean. The simulation results using real world data confirm the improved noise rejection obtained with the proposed method. © 2014 IEEE.

关键词： Electrocardiograms

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Time Frequency noise canceller for an optimized separation of the ECG from low back sEMG signals

Time Frequency noise canceller for an optimized separation o...

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2014 IEEE-EMBS International Conference on Biomedical and Health Informatics, BHI 2014

作者： El Fares Djellatou, Mohamed Boukadoum, Mounir Massicotte, Daniel Université du Québec À Trois-Rivières Dep. Electrical and Computer Engineering LSSI Canada Université du Québec À Montréal Dep. Computer Science Canada

ISBN: (纸本)9781479921317

This work describes a hybrid adaptive filtering technique, designed to optimize the removal of the electrocardiogram (ECG) from surface electromyography (sEMG) recordings. Using the adaptive noise cancellation technique (ANC), we minimize the error gradient based on combined Time-Frequency filtering enhancements. The validation on artificially prepared signals with a real data basis shows better frequency and time filtering performances in comparison to simulations with standard implementations. © 2014 IEEE.

关键词： Electrocardiograms

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Finite-time Convergence Policies in State-dep.ndent Social Networks

Finite-time Convergence Policies in State-dependent Social N...

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American Control Conference

作者： Daniel Silvestre Paulo Rosa Joao P. Hespanha Carlos Silvestre Dep. of Electrical and Computer Engineering Instituto Superior Tecnico ISR 1046-001 Lisboa Portugal Deimos Engenharia Lisbon Portugal Dept. of Electrical and Computer Eng. University of California Santa Barbara CA 93106-9560 USA Department of Electrical and Computer Engineering of the Faculty of Science and Technology of the University of Macau Macau China

ISBN: (纸本)9781479917730

This paper addresses the problem of finite-time convergence in a social network for a political party or an association, modeled as a distributed iterative system with a graph dynamics chosen to mimic how people interact. It is firstly shown that, in this setting, finite-time convergence is achieved only when nodes form a complete network, and that contacting with agents with distinct opinions reduces to a half the required interconnections. Two novel strategies are presented that enable finite-time convergence, even for the case where each node only contacts the two closest neighbors. These strategies are of prime importance, for instance, in a company environment where agents can be motivated to reach faster conclusions. The performance of the proposed policies is assessed through simulation, illustrating, in particular the finite-time convergence property.

关键词： Social Networks Converge political party Agents Policies Social Media Social Capital Ganglia

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