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A survey of public auditing for shared data storage with user revocation in cloud computing

International Journal of Network Security 2016年第4期18卷 650-666页

作者： Liu, Chi-Wei Hsien, Wei-Fu Yang, Chou-Chen Hwang, Min-Shiang Department of Computer Science and Information Engineering Asia University No. 500 Lioufeng Rd. Wufeng Taichung 41354 China Department of Management Information System National Chung Hsing University No. 91 Hsueh-Shih Road Taichung 40402 China Department of Medical Research China Medical University Hospital China Medical University No. 91 Hsueh-Shih Road Taichung 40402 China

Cloud computing technology has matured, so cloud computing produces a wide range of cloud service. Cloud storage services are one of cloud services where cloud service provider can provide storage space to customers. Because cloud storage services bring a lot of convenience, many enterprises and users store the data to the cloud storage. However, the user will outsource data to the cloud storage service, but the user is difficult to manage remote data in the cloud. Therefore, how users verify data integrity is a major challenge. In recent years, public audit is used to verify data integrity by which the user allows other to verify the user's data. Because the feature of cloud service allows users to communicate with each other on the cloud platform, the cloud storage service allows the data owner to share their data to other users. Therefore, public auditing extends to the share data, so the original operation becomes not the same including signature, public audits, dynamic data and user revocation which generates on the situation of shared data. In the paper, we define the requirements of public auditing with shared data and explain four representative approaches which include analysis function, security, and performance requirements. Finally, we provide some topics for future research.

关键词： Cloud computing Public auditing Share data User revocation

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Cortical representation of reaching and grasping movements in healthy subjects

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Gait & Posture 2017年 57卷 28-28页

作者： Iacovelli, C. Storti, S.F. Simbolotti, C. Padua, L. Conte, C. Vannozzi, G. Cereatti, A. Picerno, P. Menegaz, G. Caliandro, P. Don Carlo Gnocchi Onlus Foundation Milan Italy Department of Computer Science University of Verona Italy Institute of Neurology Department Geriatrics Neuroscience & Orthopaedics Catholic University Rome Italy Interuniversity Centre of Bioengineering of the Human Neuromusculoskeletal System (BOHNES) Department of Movement Human and Health Sciences University of Rome “Foro Italico” Italy Information Engineering Unit POLCOMING Dept University of Sassari Italy Politecnico di Torino Department of Electronics and Telecommunications Italy “eCampus” University Novedrate (CO) Italy Complex Operative Unit of Neurology Fondazione Policlinico Universitario Agostino Gemelli Rome Italy

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Automated robust test framework for electrical impedance tomography

Automated robust test framework for electrical impedance tom...

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作者： Gaggero, Pascal O. Adler, Andy Waldmann, Andreas D. Mamatjan, Yasin Justiz, Jörn Koch, Volker M Institute for Human Centered Engineering Bern University of Applied Sciences Biel/Bienne Switzerland System and Computer Engineering Carleton University OttawaONK1S 5B6 Canada Swisstom AG Schulstrasse 1 Landquart7302 Switzerland Department of Electrical-Electronics Engineering Zirve University Gaziantep Turkey

An automated test system and procedure is proposed, designed to enable systematic testing of electrical impedance tomography (EIT) devices. The system is designed to calculate reliable, repeatable and accurate performance figures of merit of an EIT system using a saline phantom and an industrial robot arm. Applications of the test system are to compare EIT devices against requirements, or to help optimize a device for its operating parameters. A test methodology and sample test results are presented to illustrate its use. The system is used to compare image quality and contrast detection for a range of stimulation and measurement patterns, and results show the best images when the pair of current injection electrodes is spaced between 45 and 170 degrees on a tank. Finally, we propose a classification of the object detection errors, which can facilitate comparison of EIT instrument specifications. © 2015 Institute of Physics and engineering in Medicine.

关键词： Image quality

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Computing finite abstractions with robustness margins via local reachable set over-approximation

Computing finite abstractions with robustness margins via lo...

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作者： Li, Yinan Liu, Jun Ozay, Necmiye Department of Automatic Control and System Engineering University of Sheffield SheffieldS1 3JD United Kingdom Department of Applied Mathematics University of Waterloo WaterlooONN2L 3G1 Canada Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109 United States

This paper proposes a method to compute finite abstractions that can be used for synthesizing robust hybrid control strategies for nonlinear systems. Most existing methods for computing finite abstractions utilize some global, analytical function to provide bounds on the reachable sets of nonlinear systems, which can be conservative and lead to spurious transitions in the abstract systems. This problem is even more pronounced in the presence of imperfect measurements and modelling uncertainties, where control synthesis can easily become infeasible due to added spurious transitions. To mitigate this problem, we propose to compute finite abstractions with robustness margins by over-approximating the local reachable sets of nonlinear systems. We do so by linearizing the nonlinear dynamics into linear affine systems and keeping track of the linearization error. It is shown that this approach provides tighter approximations and several numerical examples are used to illustrate of effectiveness of the proposed methods. © 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Nonlinear systems

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Control of 3D printed ambidextrous robot hand actuated by pneumatic artificial muscles

Control of 3D printed ambidextrous robot hand actuated by pn...

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SAI Intelligent systems Conference (IntelliSys)

作者： Mashood Mukhtar Emre Akyürek Tatiana Kalganova Nicolas Lesne Department of Electronic and Computer Engineering Brunel University Uxbridge London UK Department of System Engineering ESIEE Paris Noisy-le-Grand Cedex France

Production of robotic hands have significantly increased in recent years due to their high demand in industry and wide scope in number of applications such as tele-operation, mobile robotics, industrial robots, biomedical robotics etc. Following this trend, there have been many researches done on the control of such robotic hands. Since human like clever manipulating, grasping, lifting and sense of different objects are desirable for researchers and crucial in determining the overall performance of any robotic hand, researchers have proposed different methods of controlling such devices. In this paper, we discussed the control methods applied on systems actuated by pneumatic muscles. We tested three different controllers and verified the results on our uniquely designed ambidextrous robotic hand structure. Performances of all three control methods namely proportional-integral-derivative control (PID), Bang-bang control and Back stepping control has been compared and best controller is proposed. For the very first time, we have validated the possibility of controlling multi finger ambidextrous robot hand by using Back stepping Control. The five finger ambidextrous robot hand offers total of 13 degrees of freedom (DOFs) and it can bend its fingers in both ways left side and right side offering full ambidextrous functionality by using only 18 pneumatic artificial muscles (PAMs). Pneumatic systems are being widely used in many domestic, industrial and robotic applications due to its advantages such as structural flexibility, simplicity, reliability, safety and elasticity.

关键词： Pneumatic systems Muscles Service robots Robot sensing systems Legged locomotion

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Sensitivity analysis of high frequency signal injection based temperature estimation methods to machine, assembling tolerances

Sensitivity analysis of high frequency signal injection base...

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IEEE Energy Conversion Congress and Exposition

作者： D. Reigosa D. Fernandez T. Tanimoto T. Kato F. Briz University of Oviedo. Department of Electrical Computer & System Engineering Nissan Motor Co. Ltd Nissan Research Center EV System Laboratory

ISBN: (纸本)9781467371520

The injection of a high frequency signal in the stator via inverter has been proven to be a viable option to estimate the magnet temperature in permanent magnet synchronous machines (PMSMs). Injection of a pulsating d-axis current is especially appealing, as it is insensitive to the speed, L_d and L_q inductance variations. Furthermore, it is suitable both for interior PMSMs (IPMSMs) and surface PMSMs (SPMSMs). Regardless of its promising characteristics, there is a number of issues which can reduce its accuracy, including machine assembling tolerances and rotor lamination grain orientation, which might need to be considered. This paper analyzes the sensitivity of temperature estimation using pulsating d-axis high frequency current injection to rotor eccentricities, PM assembling tolerances and lamination grain orientation. Preliminary results indicate that these issues can have a non-negligible impact on the accuracy of the method.

关键词： PM assembling tolerances Permanent magnet synchronous machines eccentricity high frequency signal injection lamination grain orientation magnet temperature estimation

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A Review Study of Wireless Sensor Networks and Its Security

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Communications and Network 2015年第4期7卷 172-179页

作者： Muhammad Umar Aftab Omair Ashraf Muhammad Irfan Muhammad Majid Amna Nisar Muhammad Asif Habib Department of Computer Science and Engineering Yuan Ze University Taiwan Department of Computer Science NFC-IEFR Faisalabad Pakistan Land Record Management and Information System Faisalabad Pakistan IT Department Post Graduate College Faisalabad Pakistan Department of Computer Science National Textile University Faisalabad Pakistan

The confluence of cheap wireless communication, sensing and computation has produced a new group of smart devices and by using thousands of these kind of devices in self-organizing networks has formed a new technology that is called wireless sensor networks (WSNs). WSNs use sensor nodes that placed in open areas or in public places and with a huge number that creates many problems for the researchers and network designer, for giving an appropriate design for the wireless network. The problems are security, routing of data and processing of large amount of data etc. This paper describes the types of WSNs and the possible solutions for tackling the listed problems and solution of many other problems. This paper will deliver the knowledge about the WSN and types with literature review so that a person can get more knowledge about this emerging field.

关键词： WSN Overview of WSN WSN with Types WSN Security RBAC

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Straightforward modeling of fully-connected dragonfly topologies in HPC-system simulators

Straightforward modeling of fully-connected dragonfly topolo...

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International Conference on High Performance Computing & Simulation (HPCS)

作者： Pedro Yébenes Pedro J. García Francisco J. Quiles Jesus Escudero-Sahuquillo Computer System Department University of Castilla-La Mancha Albacete Spain Dept. of Computer Engineering Technical University of Valencia Valencia Spain

HPC systems are growing in number of components which have to be interconnected in an efficient way. For that reason, network design has become a key issue in the development of these systems, especially when they are made of thousands of elements. In order to maximize the performance achieved by the network with an affordable cost, new network topologies have been proposed in the last years. Among them, one of the most popular is the dragonfly topology which benefits from high radix switches. As it is not affordable to test these topologies in large real systems, simulation is widely used. In that sense, simulation frameworks are used for avoiding problems and costs derived from developing a simulator from scratch, as well as easing the design of new models. In that sense, OMNeT++ is one of the most prominent simulation frameworks, deeply accepted in modeling large networks. This paper focuses on the modeling of fully-connected dragonfly topologies and its implementation in generic HPC-system simulators. First, we explain in detail the modeling of the dragonfly interconnection pattern. Next, we also describe the modeling of the minimal-path routing algorithm which fits the proposed pattern, as well as the mechanism required for avoiding deadlocks. Besides, we describe the basics of the implementation of the proposed model in an OMNeT++-based simulator. Finally, by means of a set of experiments carried out under several dragonfly configurations, we show performance results obtained from the simulator that implements our dragonfly model, and we compare them with results shown in other papers for validation purposes. Although this evaluation has been made using an OMNeT++-based simulator, the modeled interconnection pattern and routing algorithm can be adapted to any simulation tool.

关键词： Topology Logic gates Network topology Routing system recovery Ports (computers) Adaptation models

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DWT-DCT based individuals identification using robust gait feature images

International Journal of Signal Processing, Image Processing...

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International Journal of Signal Processing, Image Processing and Pattern Recognition 2015年第4期8卷 113-124页

作者： Ibrahim Khalilullah, K.M. Hossain, Delowar Hamid, Ekramul Department of Computer Science and Engineering Bangladesh University of Business and Technology Dhaka Bangladesh Intelligent Robotics Lab Department of Electrical and Electronics System Engineering University of Toyama Japan Department of Computer Science and Engineering University of Rajshahi Rajshahi Bangladesh

Individual identification at a distance using gait features has newly gained growing interest from biometrics researchers. Most of the researchers have been shown that different covariate factors can affect different parts of the human body. In this paper, we propose a new approach that minimizes these difficulties, especially for carrying objects by combining static, dynamic, and part-based features. The Gait Features of the walking sequences are extracted by selecting only four sub bands of the Discrete Wavelet Transform (DWT) of the individual images. Moreover, Discrete Fourier Transform (DFT) and Discrete Cosine Transform (DCT) are implemented to extract lowest and middle frequency components that are used to create robust gait feature images (RGFIs). Then we select effective parts of the body from the Robust Gait Feature Images. After that, these parts of the body are trained using Principal Component Analysis (PCA) and Multiple Discriminant Analysis (MDA) to identify individuals. Experimental result shows promising performance in comparison with other methods. © 2015 SERSC.

关键词： Discrete cosine transforms

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Micromagnetic study of skyrmion racetrack and microwave oscillator

Micromagnetic study of skyrmion racetrack and microwave osci...

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AEIT International Annual Conference

作者： Riccardo Tomasello Mario Carpentieri Vito Puliafito Anna Giordano Giulio Siracusano Bruno Azzerboni Giovanni Finocchio Department of Computer Science Modelling Electronics and System Science University of Calabria Department of Electrical and Information Engineering Politecnico of Bari Department of Electronic Engineering Industrial Chemistry and Engineering University of Messina

ISBN: (纸本)9781467374194

Skyrmions are topologically protected magnetic solitons which are attracting a lot of interest from either a fundamental or a technological point of view. Skyrmions can behave as static objects, being shifted in a racetrack memory or as dynamical solitons, giving rise to topological droplets. This paper points out that a Neel skyrmion based racetrack memory driven by the spin-Hall effect could be a competitive memory architecture, and that, in nano-contact geometry, the spin-transfer torque, together with the Dzyaloshinskii-Moriya interaction, can excite stationary and non-stationary topological droplets.

关键词： Skyrmion Spin-transfer torque Dzyaloshinskii-Moriya interaction Topological droplet

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