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Laser Multi-Spectral Polarimetric Diffuse-Scatter Imaging

Laser Multi-Spectral Polarimetric Diffuse-Scatter Imaging

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Photonics and Optoelectronics, SOPO

作者： Bian Hu Yang Wang Han Q. Le Photonic Device and System Laboratory Department of Electrical and Computer Engineering University of Houston Houston TX USA

Laser multi-spectral polarimetric diffuse-scatter imaging is a technique that maps the spectral, polarimetric, and diffused scattering response functions of an object, rather than the scattered light intensity. Application of the technique to a number of targets, which included controlled objects with known optical properties and unknown objects including drug pills and insect wing, suggests its capability to discriminate and interpret features that are ambiguous or not evident with conventional Fourier optics images. Theoretical study also indicates its potential for large-angle diffuse scatter scanning microscopy that collects image information not available for on-axis scanning.

关键词： Image registration Microscopy Registers Helium Paper technology Feature extraction Biomedical imaging Medical diagnostic imaging Health information management Acceleration

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In vivo validation of an automatic controlled extracorporeal membrane oxygenator

In vivo validation of an automatic controlled extracorporeal...

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World Congress on Medical Physics and Biomedical engineering: Diagnostic and Therapeutic Instrumentation, Clinical engineering

作者： Wartzek, T. Walter, M. Schmitz-Rode, T. Kowalewski, S. Rossaint, R. Leonhardt, S. Department of Medical Information Technology RWTH Aachen University Germany Department of Applied Medical Engineering RWTH Aachen University Germany Department of Computer Science 11 Embedded Software Laboratory RWTH Aachen University Germany Clinic of Operative Intensive Care University Clinic Aachen Germany

ISBN: (纸本)9783642038846

In cases where vital gas exchange can't be provided by the human lung, extracorporeal membrane oxygenation therapy is used as an 'ultima ratio'. Up to now, the operating parameters of this long term therapy are adjusted only heuristically at infrequent and discrete time intervals during the day. In order to provide an individually and continuously adapting therapy, an automatic blood gas controller was developed. This approach allows to preset a specific oxygen and carbon dioxide partial pressure at the output of the oxygenator. The automated extracorporeal oxygenation setup then continuously monitors the status of the patient and can trigger an alarm in cases of any abnormal system behavior. Thus, the therapy is improved and the medical staff is relieved in addition. This paper describes the development of the controlled extracorporeal oxygenation system including modeling of the whole system and controller design. First results of in-vitro- and in-vivo-experiments are shown. © 2009 Springer-Verlag.

关键词： Oxygenation

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A Security Model for VoIP Steganography

A Security Model for VoIP Steganography

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The First International Conference on Multimedia Information Networking and Security(第一届国际多媒体网络信息安全会议 MINES 2009)

作者： Zhiwei Yu Clark Thomborson Junning Fu Jianmin Wang Chaokun Wang Department of Computer Science and Technology Tsinghua University Department of Computer Science The University of Auckland New Zealand School of Software Tsinghua University Key Laboratory for Information System Security Ministry of

In 2005, an extensive taxonomy of threats for VoIP was published by a prominent industry group. Strangely, this taxonomy does not identify stegocommunication as a threat, even though many steganographic channels have been identified in VoIP protocols. To avoid such security gaps in the future, we argue that stegocommunication should be added to the traditional list of network threats: interruption, interception, modification, fabrication. The stegocommunication threat arises when the communication channel is purchased, provided, or supervised by anyone other than the communicating parties. We illustrate a stegocommunication threat to a business owner Charles. If Charles purchases a VoIP service for business-related communications by an employee Alice, then he faces the risk that Alice may undetectably communicate a business secret to an outside party Bob. In this insider-threat scenario, Charles can mitigate his security risk by installing a stegodetector.

关键词： VoIP Steganography Security Model

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ARRAY: A non-application-related, secure,wide-area disaster recovery storage system

ARRAY: A non-application-related, secure,wide-area disaster ...

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2009 IEEE International Symposium on Parallel and Distributed Processing with Applications, ISPA 2009

作者： Zeng, Lingfang Feng, Dan Veeravalli, Bharadwaj Wei, Qingsong Division of Data Storage System Wuhan National Laboratory for Optoelectronics Key Laboratory of Information Storage Wuhan 430074 China School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Department of Electrical Computer Engineering National University of Singapore Singapore 117608 Singapore Data Storage Institute Singapore 117608 Singapore

ISBN: (纸本)9780769537474

With our society more information-driven, we have begun to distribute data in wide-area storage systems. At the same time, both physical failure and logic error have made it difficult to bring the necessary recovery to bear on remote data disaster, and understanding this proceeding. We describe ARRAY, a system architecture for data disaster recovery that combines reliability, storage space, and security to improve performance for data recovery applications. The paper presents an exhaustive analysis of the design space of ARRAY systems, focusing on the trade-offs between reliability, storage space, security, and performance that ARRAY must make. We present RSRAII (Replication-based Snapshot Redundant Array of Independent Imagefiles) which is a configurable RAIDlike data erasure-coding, and also others benefits come from consolidation both erasure-coding and replication strategies. A novel algorithm is proposed to improve snapshot performance referred to as SMPDP (Snapshot based on Multi-Parallel Degree Pipeline).

关键词： Recovery

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Motion vector coding using optimal predictor

Motion vector coding using optimal predictor

引用

IEEE International Conference on Image Processing

作者： Jungyoup Yang Kwanghyun Won Yung-Lyul Lee Byeungwoo Jeon School of Information and Computer Engineering Sungkyunkwan University South Korea Digital Media System Laboratory Department of Computer Engineering Sejong University South Korea

In this paper, we propose a new motion vector coding scheme using optimal predictor. To improve coding performance of motion vector data, the proposed encoder selects an optimal predictive motion vector that produces minimum bits for the given motion vector. The proposed decoder estimates the optimal predictive motion vector without additional information from encoder for indicating which predictor is used. Experimental results show that the proposed scheme is very effective in reducing coded motion vector data since it achieves BDBR (Bjøntegaard Delta Bit Rate) gain of about 4.46% on average compared to the KTA 2.0 software.

关键词： Decoding Automatic voltage control software tools Adaptive filters Motion estimation Bit rate software standards Standards development Video coding software performance

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High-Performance Cloud Computing: A View of Scientific Applications

High-Performance Cloud Computing: A View of Scientific Appli...

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International Symposium on Parallel Architectures, Algorithms and Networks (ISPAN)

作者： Christian Vecchiola Suraj Pandey Rajkumar Buyya Cloud computing and Distributed Systems (CLOUDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

Scientific computing often requires the availability of a massive number of computers for performing large scale experiments. Traditionally, these needs have been addressed by using high-performance computing solutions and installed facilities such as clusters and super computers, which are difficult to setup, maintain, and operate. Cloud computing provides scientists with a completely new model of utilizing the computing infrastructure. Compute resources, storage resources, as well as applications, can be dynamically provisioned (and integrated within the existing infrastructure) on a pay per use basis. These resources can be released when they are no more needed. Such services are often offered within the context of a service level agreement (SLA), which ensure the desired quality of service (QoS). Aneka, an enterprise cloud computing solution, harnesses the power of compute resources by relying on private and public clouds and delivers to users the desired QoS. Its flexible and service based infrastructure supports multiple programming paradigms that make Aneka address a variety of different scenarios: from finance applications to computational science. As examples of scientific computing in the cloud, we present a preliminary case study on using Aneka for the classification of gene expression data and the execution of fMRI brain imaging workflow.

关键词： Cloud computing Quality of service Application software Scientific computing Availability Large-scale systems Context-aware services Finance computer applications Gene expression

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A static method for detection of information theft malware

A static method for detection of information theft malware

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2nd International Symposium on Electronic Commerce and Security, ISECS 2009

作者： Li, JiaJing Wei, Tao Zou, Wei Mao, Jian Key Laboratory of Network and Software Security Assurance Ministry of Education Peking University Beijing 100871 China Institute of Computer Science and Technology Peking University Beijing 100871 China Department of Electronic and Information Engineering BeiHang University Beijing 10083 China

ISBN: (纸本)9780769536439

Existing techniques based on behavior semantics for information theft malware detection have the main shortcomings of low path coverage and disability of finding hidden malicious behaviors. In this paper we propose a static method for the detection of information theft malware to overcome these shortcomings. It is particularly efficienct for inter-procedure taint analysis, and it is suitable for complicated malware detection, such as Trojan and Bot. Its static style makes it able to find hidden malicious behaviors. We also present an implementation of our method that works on x86 executables and a set of experimental studies validate its good efficiency and effectiveness. © 2009 IEEE.

关键词： Malware

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A DLL-regulated SIMO power converter for DVS-enabled power-aware VLSI systems

A DLL-regulated SIMO power converter for DVS-enabled power-a...

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Midwest Symposium on Circuits and systems (MWSCAS)

作者： Rajdeep Bondade Dongsheng Ma Integrated System Design Laboratory Department of Electrical & Computer Engineering University of Arizona Tucson Tucson AZ USA

A delay-locked loop (DLL) regulated single-inductor multiple-output (SIMO) power converter is presented. It takes advantage of the fast phase locking property of a DLL to identify the SIMO converter's regulation errors between the output voltages and their corresponding references. In response to these errors, an adaptive peak current modulation technique is proposed to adjust the instantaneous duty ratios, and thus minimize the regulation errors in the converter. The DLL acquires locking within 350 ns, allowing it to respond to load dynamics promptly, which is very desirable for DVS-enabled power-efficient VLSI systems. The system was designed and simulated in IBM 130-nm CMOS process. Fully transistor-based HSPICE simulations show that, with a 1.8 V nominal input supply, the converter precisely regulates two independent output voltages at 0.9 V and 1.5 V, respectively. It achieves the maximum efficiency of 87.2% at a total power of 104.8 mW and a switching frequency of 500 kHz.

关键词： Very large scale integration Pulse width modulation Error correction Voltage control Delay Inductors Integrated circuit noise DC-DC power converters Network-on-a-chip Power dissipation

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A self-repairable microprocessor

A self-repairable microprocessor

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ISTC/CSTIC 2009 (CISTC)

作者： Xie, Yuanjiang Fu, Xiang He, Zijian Zhao, Yang Hu, Yu Li, Xiaowei Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing 100190 China Institute of Computing Technology Chinese Academy of Sciences Beijing China Graduate School of Chinese Academy of Sciences Beijing 100049 China Department of Computer Science and Engineering University of California Riverside 92521 United States

ISBN: (纸本)9781615676460

With increasing defect density, microprocessors, especially the embedded caches, will encounter more faults. Adding spare resources to replace defective components is a widely accepted method for yield enhancement. In this work, a repair method using content addressable memory combined with spare bits, as well as a novel fault injection method is proposed. With the proposed fault injection technique, various numbers and types of faults can be flexibly injected into the silicon. A wireless sensor network system using our self-repairable microprocessor (SRP) is developed to prove the effectiveness of the proposed technique. ©The Electrochemical Society.

关键词： Wireless sensor networks

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Embedding a wireless transmitter within the space and power constraints of an electronic untethered microrobot

Embedding a wireless transmitter within the space and power ...

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Annual IEEE Northeast Workshop on Circuits and systems (NEWCAS)

作者： Sylvain Martel Walder Andre NanoRobotics Laboratory Department of Computer and Software Engineering and the Institute of Biomedical Engineering École Polytechnique de Montréal Montreal QUE Canada

Standard transmission methods such as RF have been considered for untethered robots that need to send messages and information to an external computer. But, as the overall sizes of such robots decrease, the implementation of such transmission systems within the space and power constraints becomes more challenging. For microrobots, the challenge is even greater and furthermore, the overall size of such microrobots can often decrease to a level where the implementation of transmitters as we know them today, cannot be implemented due to several reasons. First, known transmitters require a relatively large amount of electrical power, which is a concern for microrobots. Indeed, a power source such as a battery cannot be embedded since it will be much larger than the microrobot itself. Power can be induced but again, the size of the reception coils capable of providing sufficient electrical power for the transmitter would also be much larger than the robot itself. Another constraint is the overall size of the transmission antennae which would be larger than a single microrobot. As such, a new transmission scheme that can be embedded in an intelligent microrobot with overall dimensions slightly larger than the human hair thickness is briefly introduced. When operating in proximity of an extremely sensitive magnetic receptor, a small electrical current provided by miniature photovoltaic cells on top of the microrobot can be used to generate a local electromagnetic field perturbation sufficiently high to be detected. By modulating such local electromagnetic field from sensory information captured by the microrobot, data and communication commands can be transmitted based on sensory information to an external central computer that could be used to coordinate a swarm of such intelligent microrobots.

关键词： Transmitters Orbital robotics Robot kinematics Electromagnetic fields Radio frequency Batteries Coils Transmitting antennas Intelligent robots Humans

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