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IEEE International Workshop on Medical Measurement and Applications (MEMEA)

作者： A.S. Fiorillo D. Grimaldi F. Lamonaca School of Biomedical Engineering University of Magna Græcia Catanzaro Italy Department of Electronics Computer and System Sciences University of Calabria Rende Cosenza Italy

Functional Magnetic Resonance Imaging (fMRI) is one of the main techniques for the in vivo diagnosis of physiological and psychological diseases. During the data acquisition, alterations may intervene causing uncertainty in the diagnosis. Therefore, many preprocessing techniques are developed to reduce the alteration effects. Since today there is no consensus on standard procedure to perform the fMRI preprocessing, many correction techniques and evaluation metrics are used. The different preprocessing procedures give different information to the clinicians. Different diagnosis will be provided if the used preprocessing procedure is not completely known and then the preprocessed data are not correctly interpreted. The aim of the paper is to provide an overview of the fMRI preprocessing procedures in order to stimulate the interest of the scientific community (i) to develop and experiment new and advanced techniques for efficiency and accuracy improvement, and (ii) to attain an unified procedure.

关键词： Brain Magnetic resonance imaging Physiology Noise Time series analysis Filtering Smoothing methods

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A 10.3Gbps translmpedance amplifier with mutually coupled inductors in 0.18-μm CMOS

A 10.3Gbps translmpedance amplifier with mutually coupled in...

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International SoC Design Conference, ISOCC

作者： Shigekazu Miyawaki Makoto Nakamura Akira Tsuchiya Keiji Kishine Hidetoshi Onodera Department Communications and Computer Engineering Kyoto University Japan NTT Photonics Laboratories NTT Corporation Japan Department of Electronic System Engineering Kyoto University Japan Department Communications and Computer Engineering University of Shiga Prefecture Japan Photonics and Electronics Science and Engineering and Center (PESEC) Kyoto University Japan

In this paper, a 10.3Gbps transimpedance amplifier (TIA) with mutually coupled inductors is presented. The proposed circuit is fabricated in 0.18μm CMOS and it achieves 10.3Gbps operation in the presence of a 0.25pF photo-diode capacitance. The transimpedance gain is 50dBΩ. The -3dB bandwidth is 5.9GHz, and the group delay dispersion is 10ps over the -3dB bandwidth. The TIA core circuit consumes 4.23mW under 1.8V supply voltage, and occupies an area of 0.12mm 2 . Employing a design for small group delay dispersion, the measured TIA demonstrates the mask margin of 43% at 10.3Gbps operation.

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Quantum-limited phase-matching effect in a Λ-type laser system

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Physical Review A 2011年第6期83卷 063846-063846页

作者： Deshui Yu Jingbiao Chen Department of Applied Physics The University of Tokyo Bunkyo-ku Tokyo 113-8656 Japan Institute of Quantum Electronics and State Key Laboratory of Advanced Optical Communication System & Network School of Electronics Engineering & Computer Science Peking University Beijing 100871 P.R. China

The theory of a quantum-limited phase-matching effect in a Λ-type lasing system is studied in detail based on the quantum Langevin approach. Two quasimonochromatic fields are directly generated based on two lasing transitions. We find that the coherence between two lasers can well exceed the linewidth of either laser field. This result denotes that two field phases match each other although either laser field has a high phase fluctuation. Unlike the phase-matching effect based on atomic absorption, the final coherence between two laser fields here is not limited by saturation broadening, and the higher laser intensities lead to a higher coherence. Additionally, based on a linear stability analysis, we find that the instability of the field steady state can substantially restrict the occurrence of this phase-matching effect in the bad-cavity limit for a high pump rate. We also discuss the spectrum of amplitude fluctuations of output fields, and the result shows that the squeezing of amplitude fluctuations at low frequencies for a single field oscillating inside the cavity is damaged in the case of two fields oscillating.

关键词： LASERS LIGHT amplifiers OPTOELECTRONIC devices NONLINEAR optics BASES (Linear topological spaces)

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A Flexible Parallel Transmission Scheme Using Frequency Domain Multi-Layered OFDM system

A Flexible Parallel Transmission Scheme Using Frequency Doma...

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IEEE Conference on Vehicular Technology (VTC)

作者： Jiaxin Yang Xianbin Wang Sung Ik Park Heung Mook Kim Department of Electrical and Computer Engineering University of Western Ontario London ONT Canada Broadcasting System Research Group Electronics and Telecommnications Research Institute Daejeon South Korea

A novel adaptive Orthogonal Frequency-Division Multiplexing (OFDM) system with multi-layered (ML) transmission is proposed for mobile multimedia networks to support transmission of multiple data streams with flexible Quality-of-Service (QoS) adjustment capability and therefore can accommodate users with different QoS requirements or link conditions. The enhanced layers (ELs), formulated by parallel modulated orthogonal pseudo-random sequences, are superimposed onto OFDM data in frequency domain prior to multicarrier modulation and used to transmit different data information without the requirement of additional links. In this paper, the transceiver design particularly the frequency domain correlation detector and ELs induced interference cancellation is presented. A power distribution scheme for ELs is further proposed to optimize the overall system performance. The performance of the proposed ML-OFDM system is evaluated through numerical simulations.

关键词： OFDM Bit error rate Power distribution Quality of service Frequency domain analysis Multimedia communication Demodulation

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Additional data transmission scheme for the ATSC terrestrial DTV systems based on a low rate systematic irregular repeat-accumulate code

Additional data transmission scheme for the ATSC terrestrial...

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IEEE International Symposium on Broadband Multimedia systems and Broadcasting (BMSB)

作者： Donghoon Kang Yongwook Lee Kwangjun Ko Sung Ik Park Heung Mook Kim Wangrok Oh Department of Electrical and Computer Engineering Chungnam National University Daejeon South Korea Broadcasting System Research Group Electronics and Telecommunications Research Institute Daejeon South Korea

In this paper, we propose an additional data transmission scheme for the ATSC (Advanced Television systems Committee) terrestrial DTV (digital television) systems based on a low rate systematic irregular repeat-accumulate (SIRA) code. Unlike the previously proposed additional data transmission scheme using TxID (transmitter identification) signals, the proposed scheme conjuncted with a DTV VSB signal cancellation technique is suitable for high data transmission. Compared to the previous additional data transmission scheme based on a low rate systematic repeat-accumulate code, the BER performance of the proposed scheme is significantly improved. The additional data is encoded with a simplified IRA channel coding scheme and injected to the conventional VSB signals with the bury ratio (BR) of -27 dB. With the proposed scheme, an additional data of rate up to 1 Mbps can be transmitted along with the ATSC terrestrial DTV signals by minimizing the detrimental effects on the ATSC terrestrial DTV systems.

关键词： Digital TV Bit error rate Data communication Decoding Iterative decoding systematics Repeaters

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Target follwing with a vision sway compensation for robotic fish Fibo

Target follwing with a vision sway compensation for robotic ...

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IEEE International Conference on Robotics and Biomimetics

作者： Ki-In Na In-Bae Jeong Seungbeom Han Jong-Hwan Kim Cognitive System Research Department Electronics and Telecommunications Research Institute Daejeon South Korea Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Daejeon South Korea

ISBN: (纸本)9781457721366

Since the heading direction of a robotic fish continuously changed when it is swimming, its surrounding information may not be easily obtained from a front camera equipped on the robotic fish's head. Also, it is difficult to know both the heading direction, which is direction of robotic fish's head and the swimming direction, which robotic fish are moving toward. Therefore, this paper proposes the gyro sensor-based vision sway compensation module to obtain surrounding information from a camera equipped on a swaying robotic fish's head using a gyro sensor. Firstly, the time when heading direction and swimming direction coincide is detected. The swimming direction image is priodically captured and updated at this time using a gyro sensor and a front camera. Then, the input images are continuously transformed to the relative location. This transformation is performed by image stitching which consists of speeded up robust features (SURF) and random sample consensus (RANSAC), comparing with the captured swimming direction image. By this developed module, it is possible to get the surrounding information from the transformed input images and also to get the relative location of target object. The effectiveness of the proposed gyro sensor-based vision sway compensation module is demonstrated through real target following experiment using the robotic fish “Fibo II,” developed in the RIT Lab, KAIST.

关键词： Cameras Head Robot vision systems Magnetic heads

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Digital to analog converters test based on time to voltage conversion

Digital to analog converters test based on time to voltage c...

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IEEE Instrumentation and Measurement Technology Conference

作者： A. Baccigalupi A. Liccardo D. Grimaldi D. L. Carnì Department of Computer Science University Federico II Naples Italy Department of Electrical Engineering University Federico II Naples Italy Department of Electronics Computing and System Science University of Calabria Rende Cosenza Italy

The paper deals with a low cost measurement station for DAC dynamic characterization. The characterization method is based on the estimate of the DAC output voltage through the measurement of time intervals. These are performed by the DSP, which evaluates the time between two edges of the input signal. A proper system has been implemented with the aim of conditioning the DAC output signal in order to obtain a resulting square shaped signal with width proportional to the DAC output voltage. The advantages of the method are: (i) DAC voltages estimated by means of time interval measurements, this permits to obtain higher resolution respect to amplitude measurements; (ii) measurement set up characterized by limited size and costs, this supports the realize of BIST (built-in self-test) system.

关键词： Voltage measurement Time measurement Accuracy Digital signal processing Signal resolution Frequency measurement Uncertainty

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Recommendation Algorithm Based on Graph-Model Considering User Background Information

Recommendation Algorithm Based on Graph-Model Considering Us...

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International Conference on Creating, Connecting and Collaborating Through Computing

作者： Ziqi Wang Ming Zhang Yuwei Tan Wenqing Wang Yuexiang Zhang Ling Chen School of Electronics Engineering and Computer Science Peking University Beijing China Department of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong China National Administrative Center of CALIS (China Academic Library Information System) Peking University Library Beijing China

With the development of information technologies and increase scale of digital resources, personalized recommendation systems have come into the big picture of web2.0 technology. This paper proposed a graph-based recommendation algorithm using the user-resource rating data to construct a graph model and improves the model by adding user background information. The Random Walk with Restarts algorithm is applied to generate the final recommendation set. The improvement in accuracy on sparse data is illustrated by the experiments on the Movie Lens data set, comparing with the collaborative filtering algorithm.

关键词： Motion pictures Collaboration Social network services Algorithm design and analysis computer science Symmetric matrices Protocols

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Chemical-mechanical polishing aware application-specific 3D NoC design 11

Chemical-mechanical polishing aware application-specific 3D ...

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IEEE International Conference on computer-Aided Design

作者： Wooyoung Jang Ou He Jae-Seok Yang David Z. Pan SoC Platform Development Team Samsung Electronics Limited Yongin si South Korea IBM System & Technology Group Beijing China Department of Electrical and Computer Engineering University of Texas Austin Austin USA

ISBN: (纸本)9781457713989

In this paper, we propose the first chemical-mechanical polishing (CMP) aware application-specific three-dimensional (3D) network-on-chip (NoC) design that minimizes through-silicon-via (TSV) height variation, thus reduces its bonding failure, and meanwhile optimizes conventional NoC design objectives. Our 3D NoC design assigns cores to proper silicon layers, determines the 3D NoC topology, allocates routing paths, and then floorplans cores, routers and TSV arrays by a CMP-aware manner. The key idea behind this 3D NoC design flow is to determine the CMP-aware 3D NoC topology where TSV arrays with low and uniform metal density are inserted between adjacent layers. Experimental results show that our CMP-aware 3D NoC design can achieves lower TSV height variation, higher performance and lower power consumption than the previous state-of-the-art 3D NoC designs.

关键词： Through-silicon vias Three dimensional displays Topology Bonding Silicon Metals Power demand

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Towards runtime testing in automotive embedded systems

Towards runtime testing in automotive embedded systems

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International Symposium on Industrial Embedded systems

作者： C. Bradatsch T. Ungerer R. Zalman A. Lajtkep Systems and Networking Department of Computer Science University of Augsburg Augsburg Germany Automotive Electronics Microcontroller Development-System & Software Engineering Infineon Technologies Neubiberg Germany Electrics/Electronics and Driver Environment Platform Technologies Software and AUTOSAR BMW Group Munich Germany

Runtime testing is a common way to detect faults during normal system operation. To achieve a specific diagnostic coverage runtime testing is also used in safety critical, automotive embedded systems. In this paper we propose a test architecture to consolidate the hardware resource consumption and timing needs of runtime tests and of application and system tasks in a hard real-time embedded system as applied to the automotive domain. Special emphasis is put to timing requirements of embedded systems with respect to hard real-time and concurrent hardware resource accesses of runtime tests and tasks running on the target system.

关键词： Circuit faults Testing Runtime Hardware Safety Automotive engineering Embedded systems

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