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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Ehsan Ashoori Farzad Asgarian Amir M. Sodagar Euisik Yoon Research Laboratory for Integrated Circuits and Systems (ICAS) Electrical & Computer Eng. Dept K.N. Toosi University of Technology Research Laboratory for Integrated Circuits and Systems (ICAS) Electrical & Computer Eng. Dept. K.N. Toosi University of Technology Center for Wireless Integrated Microsystems Department of Electrical Engineering and Computer Science University of Michigan

ISBN: (纸本)9781424441211

In this paper employing double layer printed spiral coils (PSCs) is proposed for wireless power transmission in implantable biomedical applications. Detailed modeling of this type of PSCs is presented. Both calculations and measurements of fabricated double layer PSCs indicate that this structure can decrease the size of typical single layer PSCs without any change in the most important parameters of the coils, such as quality factor. Also, it is shown that with equal PSC dimensions and design parameters, double layer PSCs achieve significantly higher inductances and quality factors. Ultimately, a pair of double layer PSCs with a distance of 5 mm in air is used in an inductive link. The power transfer efficiency of this link is about 79.8% with a carrier frequency of 5 MHz and coupling coefficient of 0.189.

关键词： Double layer helical coil Quality factor TRANSFER EFFICIENCY Implants and Prostheses CARRIER FREQUENCY biomedical

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Titanium Dioxide Nanotubes Decorated with Nanoparticles for Dye Sensitized Solar Cells

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MRS Online Proceedings Library 2011年第1期1303卷 81-86页

作者： Xuan Pan Yong Zhao Changhong Chen Zhaoyang Fan Nano Tech Center and Dept. of Electrical and Computer Engineering Texas Tech University Lubbock United States Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan China

The titanium dioxide (TiO2) nanoparticle (NP) structure has higher surface area and dye loading value to increase photon absorption while the nanotube (NT) can suppress the random walk phenomena to enhance carrier collection. In this work, hydrothermal method was utilized to infiltrate the TiO2 nanotube array by TiO2 nanoparticles with the aim of combining the advantages of both nanostructures to improve dye sensitized solar cells (DSSCs) efficiency. Structure morphology, device performance, and electrochemical properties were investigated. SEM observation confirmed that around 10 nm TiO2 nanoparticles uniformly covered the NT wall. TiO2 NT samples at three different lengths: 8 μm, 13 μm and 20 μm, decorated with different amount of nanoparticles were studied to optimize the structure for light absorption and electron transport to achieve high solar conversion efficiency. Electrochemical impedance spectroscopy (EIS) was also employed to investigate the cells’ parameters: electron lifetime (τ), diffusion length (Ln) et al, to gain insight on the device performance. The incident photon conversion efficiency (IPCE) was also reported.

关键词： energy generation nanostructure transportation

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An associative learning experiment using the plasmodium of Physarum polycephalum

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Nano Communication Networks 2011年第2-3期2卷 99-105页

作者： Shirakawa, Tomohiro Gunji, Yukio-Pegio Miyake, Yoshihiro Department of Computer Science School of Electrical and Computer Engineering National Defense Academy of Japan 1-10-20 Hashirimizu Yokosuka Kanagawa 239-8686 Japan Department of Earth and Planetary Science Graduate School of Science Kobe University 1-1 Rokkodai Kobe Hyogo 657-8501 Japan Dept. of Earth and Planetary Science Faculty of Science Kobe University 1-1 Rokkodai Kobe Hyogo 657-8501 Japan Department of Computational Intelligence and Systems Science Interdisciplinary Graduate School of Science and Engineering Tokyo Institute of Technology 4259 Nagatsuta Midori Kanagawa 226-8502 Japan

The plasmodium of Physarum polycephalum is a unicellular and multinuclear giant amoeba that shows adaptive behaviors. To test the presence of memory and learning ability in the plasmodium, we performed an associative learning experiment using the unicellular organism. The plasmodium in this experiment seemed to acquire a reversed thermotactic property, a new preference for the lower temperature. The result implied a possibility of unicellular learning, though in a preliminary way. We also discuss a possible mechanism of learning by the organism. © 2011 Elsevier Ltd.

关键词： Biology

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Passive mode-locker incorporating physically exfoliated graphene for fiber ring lasers

Passive mode-locker incorporating physically exfoliated grap...

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作者： Chang, You Min Kim, Hyungseok Lee, Ju Han Song, Yong-Won School of Electrical and Computer Engineering University of Seoul Seoul 130-743 Korea Republic of Optoelectronic Materials Center Korea Institute of Science and Technology Seoul 136-791 Korea Republic of Dept. of Materials Science and Engineering University of California at Los Angeles Los Angeles CA 90095 United States

A passively mode-locked fiber laser is realized using an intracavity intensitymodulating effect in multilayered graphene efficiently prepared by taping method. 10.6-MHz pulse trains with 40-dB extinction rate are guar... 详细信息

ISBN: (纸本)9781457702136

关键词： Ring lasers

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Evaluation of a Closed Loop Inductive Power Transmission System on an Awake Behaving Animal Subject

Evaluation of a Closed Loop Inductive Power Transmission Sys...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Mehdi Kiani Ki Yong Kwon Fei Zhang Karim Oweiss Maysam Ghovanloo GT-Bionics Lab School of Electrical and Computer Engineering at Georgia Institute of Technology Neural Systems Engineering Lab ECE Dept. College of Eng. at Michigan State University ECE Dept. and Neuroscience Program at Michigan State University

ISBN: (纸本)9781424441211

This paper presents in vivo experimental results for a closed loop wireless power transmission system to implantable devices on an awake behaving animal subject. In this system, wireless power transmission takes place across an inductive link, controlled by a commercial off-the-shelf (COTS) radio frequency identification (RFID) transceiver (TRF7960) operating at 13.56 MHz. Induced voltage on the implantable secondary coil is rectified, digitized by a 10-bit analog to digital converter, and transmitted back to the primary via back telemetry. Transmitter (Tx) and receiver (Rx) circuitry were mounted on the back of an adult rat with a nominal distance of ～7 mm between their coils. Our experiments showed that the closed loop system was able to maintain the Rx supply voltage at the designated 3.8 V despite changes in the coils' relative distance and alignment due to animal movements. The Tx power consumption changed between 410 ～ 560 mW in order to deliver 27 mW to the receiver. The open loop system, on the other hand, showed undesired changes in the Rx supply voltage while the Tx power consumption was constant at 660 mW.

关键词： Coils Inductive power transmission Closed loop systems awake Induction loop systems analog digital converter supply voltage Power consumption Implants and Prostheses Contraceptive Coil Radio frequency identification Back Open loop systems Digitizers

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Analysis of a Partially Decentralized Framework for Operating Future Power systems

Analysis of a Partially Decentralized Framework for Operatin...

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IEEE Power and Energy Society General Meeting

作者： Mingyang Li Peter B. Luh Eugene Litvinov Peng Zhang Center for Intelligent and Networked Systems (CFINS) Department of Automation Tsinghua National Laboratory for Information Science & Technology (TNLIST) Tsinghua University Dept. of Electrical & Computer Engineering University of Connecticut ISO New England Inc.

ISBN: (纸本)9781457710001

In future power systems, the Smart Grid technologies will bring in a large number of new entities, which are different from those in the current systems in two major aspects: first, the entities are geographically distributed throughout the system with their detailed information not available to the system operator, and second, the entities tend to autonomously optimize their own benefits. In view of both aspects, it is difficult to use the current centralized framework to operate future systems. In this paper, we present and analyze a new partially decentralized framework and the corresponding mechanisms as one step from the current framework toward the future ones, and the focus is on the real time electricity markets with a dispatch cycle of five minutes. In each dispatch cycle, the system operator posts electricity price forecasts, and individual entities actively respond to the prices to dispatch themselves. The system-wide power imbalance is used as a correction term in the next dispatch cycle to iteratively update the price forecasts, so that system balance is maintained in the long term. The new framework can accommodate the large number of entities without knowing their detailed information, and enable the entities to achieve better economic benefits. Small examples are used to analyze our framework and to compare it with the current one.

关键词： System operation Autonomous entities Renewable generation Decentralized Real time market Electricity price Decentralized Operating systems Dispatching Electricity pricing Frameworks power systems correct entry Smart grids Prices

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RSS-BASED NODE LOCALIZATION IN THE PRESENCE OF ATTENUATING OBJECTS

RSS-BASED NODE LOCALIZATION IN THE PRESENCE OF ATTENUATING O...

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IEEE International Conference on Acoustics, Speech and Signal Processing

作者： Andrea Edelstein Xi Chen Yunpeng Li Michael Rabbat Dept. of Electrical and Computer Engineering McGill University Montreal Quebec Canada Multimedia Technology Center Beijing Univ. of Posts and Telecom. Beijing China

ISBN: (纸本)9781457705380

Node localization is an important task in the context of wireless sensor networks. Although algorithms already exist to carry out localization using measurements of received signal strength (RSS), none of these methods take into account the attenuating and scattering effects of objects which lie within or around the network and which therefore affect the obtained RSS measurements. In this paper, we use a map of the attenuations seen over a given area in order to reinterpret the measured RSS values, thereby refining RSS-based node localization and providing significant improvements over existing algorithms. Simulation results are presented to demonstrate the performance gains which can be achieved using our method.

关键词： Wireless sensor networks node localiza-tion received signal strength impairments shadowing RSS gene Really Simple Syndication REACTOR SAFETY STUDY Attenuation presences maps Simulation results

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Preferential expression of potential markers for cancer stem cells in large cell neuroendocrine carcinoma of the lung. An FFPE proteomic study

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Journal of Clinical Bioinformatics 2011年第1期1卷 1-13页

作者： Nomura, Masaharu Fukuda, Tetsuya Fujii, Kiyonaga Kawamura, Takeshi Tojo, Hiromasa Kihara, Makoto Bando, Yasuhiko Gazdar, Adi F. Tsuboi, Masahiro Oshiro, Hisashi Nagao, Toshitaka Ohira, Tatsuo Ikeda, Norihiko Gotoh, Noriko Kato, Harubumi Marko-Varga, Gyorgy Nishimura, Toshihide Dept. of Surgery I Tokyo Medical University Tokyo Japan Diagnostic Pathology Division Tokyo Medical University Tokyo Japan Biosys Technologies Inc Tokyo Japan Dept. of Structural Biology Graduate School of Pharmaceutical Science Hokkaido University Hokkaido Japan Laboratory for Systems Biology and Medicine RCAST The University of Tokyo Tokyo Japan Dept. of Biophysics and Biochemistry Osaka University Graduate School of Medicine Suita Japan Medical ProteoScope Co. Ltd Tokyo Japan Hamon Center for Therapeutic Cancer Research UT Southwestern Medical Center Texas United States Division of Systems Biomedical Technology The Institute of Medical Science The University of Tokyo Tokyo Japan Niizashiki Central General Hospital Saitama Japan Clinical Protein Science and Imaging Dept. of Measurement Technology and Industrial Electrical Engineering Lund University Lund Sweden

Background: Large cell neuroendocrine carcinoma (LCNEC) of the lung, a subtype of large cell carcinoma (LCC), is characterized by neuroendocrine differentiation that small cell lung carcinoma (SCLC) shares. Pre-therapeutic histological distinction between LCNEC and SCLC has so far been problematic, leading to adverse clinical outcome. We started a project establishing protein targets characteristic of LCNEC with a proteomic method using formalin fixed paraffin-embedded (FFPE) tissues, which will help make diagnosis ***: Cancer cells were collected by laser microdissection from cancer foci in FFPE tissues of LCNEC (n = 4), SCLC (n = 5), and LCC (n = 5) with definite histological diagnosis. Proteins were extracted from the harvested sections, trypsin-digested, and subjected to HPLC/mass spectrometry. Proteins identified by database search were semi-quantified by spectral counting and statistically sorted by pair-wise G-statistics. The results were immunohistochemically verified using a total of 10 cases for each group to confirm proteomic ***: A total of 1981 proteins identified from the three cancer groups were subjected to pair-wise G-test under p < 0.05 and specificity of a protein's expression to LCNEC was checked using a 3D plot with the coordinates comprising G-statistic values for every two group comparisons. We identified four protein candidates preferentially expressed in LCNEC compared with SCLC with convincingly low p-values: aldehyde dehydrogenase 1 family member A1 (AL1A1) (p = 6.1 × 10^-4), aldo-keto reductase family 1 members C1 (AK1C1) (p = 9.6x10^-10) and C3 (AK1C3) (p = 3.9x10^-10) and CD44 antigen (p = 0.021). These p-values were confirmed by non-parametric exact inference tests. Interestingly, all these candidates would belong to cancer stem cell markers. Immunohistochmistry supported proteomic ***: These results suggest that candidate biomarkers of LCNEC were related to cance

关键词： cancer stem cell markers formalin-fixed paraffin embedded tissues large cell neuroendocrine carcinoma mass spectrometry

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Simulation of Realistic Core-shell Silicon Nanowires

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MRS Online Proceedings Library 2011年第1期910卷 4-9页

作者： Rana Biswas Bicai Pan Depts. of Physics and Astronomy Electrical and Computer Engineering Microelectronics Research Center and Ames Lab Iowa State University Ames USA Dept. of Physics University of Science and Technology of China People’s Republic of China

We have developed an efficient scheme for simulating silicon nanowires with crystalline cores and amorphous sheaths, using molecular dynamics. By starting with a crystalline nanowire and performing high temperature anneal an amorphous outer sheath can be grown with controlled thickness on the nanowire. Simulations for [001] nanowires with diameters of 12 nm find low energy facets between the amorphous and crystalline layers. Simulations for [110] nanowires find weak faceting and an inhomogeneous amorphouscrystalline boundary.

关键词： nanostructure simulation amorphous

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P-13: Photosensitivity of Amorphous IGZO TFTs for Active-Matrix Flat-Panel Displays

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SID Symposium Digest of Technical Papers 2012年第1期39卷

作者： Chiao-Shun Chuang Tze-Ching Fung Barry G. Mullins Kenji Nomura Toshio Kamiya Han-Ping David Shieh Hideo Hosono Jerzy Kanicki Dept. of Electrical Engineering and Computer Science University of Michigan Ann Arbor Michigan 48105 USA Dept. of Photonics & Display Institute National Chiao Tung University Hsinchu Taiwan 30010 R.O.C. ERATO-SORST JST in Frontier Collaborative Research Center / Materials and Structures Laboratory Mail Box R3-1 Tokyo Institute of Technology 4259 Nagatsuta Midori-ku Yokohama 226-8503 Japan

We studied the optical and electrical properties of the amorphous indium gallium zinc oxide thin-film transistors (a-IGZO TFTs). To develop a-IGZO density-of-states model, intrinsic a-IGZO optical properties such as optical band gap and Urbach energy, and TFT characteristics under illumination are investigated. During the a-IGZO TFTs illumination with the wavelengths ranging from 460 to 660 nm, the off-state drain current only slightly increases while a large increase was observed for the wavelength below 400 nm. Threshold voltage and subthreshold swing are also only slightly modified between 460 to 660 nm, while field-effect mobility is almost unchanged in the investigated photon energy range. The observed results are consistent with the a-IGZO optical energy band gap of about 3.05 eV. This study suggest that the a-IGZO TFTs are light sensitive above 3.0 eV and photogenerated electrons are more mobile than holes within device channel region.

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