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2007 International conference on Planarization/CMP Technology, ICPT 2007

作者： Choi, G.W. Lee, W.S. Seo, Y.J. Department of Electrical Engineering Chosun University Gwangju501-759 Korea Republic of Department of Electrical Engineering Daebul University Youngam526-702 Korea Republic of

ISBN: (纸本)9783800730650

The optimal process parameters were determined by using a design of experiment (DOE) approach for chemical-mechanical polishing of indium tin oxide with a sufficient removal amount and good planarity. The electrical and optical properties, such as current-voltage (I-v) curve and photoluminescence spectrum, were discussed in order to evaluate the possibility of the CMP application for an organic light emitting diode (OLED) device using an ITO film. The electrical I-v characteristics and optical properties of ITO thin film were improved after the CMP process using optimized process parameters compared to that of as-deposited thin film before the CMP process. © ICPT 2007 - International conference on Planarization/CMP Technology, Proceedings. All rights reserved.

关键词： design of experiments

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High-speed photodiodes for 2.0-4.0 μm spectral range

High-speed photodiodes for 2.0-4.0 μm spectral range

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19th International conference on Photoelectronics and Night vision Devices

作者： Yakovlev, Yu. P. Andreev, I. A. Kizhayev, S. S. Kunitsyna, E. v. Mikhailova, M. P. RAS AF Ioffe Phys Tech Inst Politekhnicheskaya 26 St Petersburg 194021 Russia

ISBN: (纸本)9780819467829

This paper reviews some recent developments in the high-speed photodiodes for 2.0-4.0 mu m spectral range. We report investigation, design and fabrication of broad bandwidth (2 GHz) GaInAsSb/GaAlAsSb p-i-n photodiodes operating in the 0.9-2.4 mu m spectral range with submicroampere dark current. As well, we present InAs-based and InAs/InAsSbP photodiodes with long-wavelength cutoff of 3.8 mu m. An analysis of the photodiode performance through the investigation of current-voltage, capacitance-voltage and spectral responsivity characteristics was carried out. Also, noise and speed-response characteristics were studied. In addition to high-speed response and low noise level these photodiodes offer room-temperature operation and hence are commercially viable. These devices are of great interest for a wide range of applications, such as high-resolution laser diode spectroscopy of gases and molecules, eye-safe laser rangefinding systems, the free-space optical link as well as systems of optical fiber communication.

关键词： high-speed photodiodes heterostructures dark current

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Direct torque control of PMSM using fuzzy logic with PWM

Direct torque control of PMSM using fuzzy logic with PWM

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42nd International Universities Power engineering conference

作者： Noriega, G. Restrepo, J. Guzman, v. Gimenez, M. Aller, J. UNEXPO Venezuela Universidad Simón Bolivar Venezuela

ISBN: (纸本)9781905593361

Since its development, Permanent Magnet Synchronous Machines (PMSM) has been used in a number of specific applications. However, in recent years PMSMs have become more attractive due to developments in new materials for permanent magnets and in semiconductor technology for converter design. Recent investigations have proposed some implementations applying the Direct Torque Control (DTC) technique to PMSM motor drives, offering a fast and accurate control. This paper presents a modified DTC scheme, using fuzzy logic with Pulse Wide Modulation (PWM) to improve stator flux and the electric torque by significantly reducing their ripple. The proposed method effectiveness has been verified by computer simulations and experimental tests on a laboratory prototype. These results are compared with the ones obtained with a modified DTC using a PI controlled PWM with current limit.

关键词： PMSM DTC PWM fuzzy logic

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Acid-etched fabry-perot micro-cavities in optical fibres

Acid-etched fabry-perot micro-cavities in optical fibres

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International conference on Smart Materials and Nanotechnology in engineering

作者： Machavaram, v. R. Badcock, R. A. Fernando, G. F. Univ Birmingham Dept Met & Mat Edgbaston B15 2TT England

ISBN: (纸本)9780819465368

Significant progress has been made in recent years on the design and fabrication of optical fibre-based sensor systems for applications in structural health monitoring. Two sensor designs have tended to dominate namely, fibre Bragg gratings and extrinsic fibre Fabry-Perot sensors. However, the cost and time associated with these sensors is relatively high and as a consequence, the current paper describes a simple procedure to fabricate intrinsic fibre Fabry-Perot interferometric strain sensors. The technique involves the use of hydrofluoric acid to etch a cavity in a cleaved optical fibre. Two such etched cavities were fusion spliced to create an intrinsic fibre Fabry-Perot cavity. The feasibility of using this device for strain monitoring was demonstrated. Excellent correlation was obtained between the optical and surface-mounted electrical resistance strain gauge.

关键词： hydrofluoric acid etching Fabry-Perot cavities smart sensors

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Selective oxidations in micro-structured catalytic reactors -: For gas-phase reactions and specifically for fuel processing for fuel cells

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CATALYSIS TODAY 2007年第1期120卷 2-20页

作者： Kolb, G. Hessel, v. Cominos, v. Hofmann, C. Loewe, H. Nikolaidis, G. Zapf, R. Ziogas, A. Delsman, E. R. de Croon, M. H. J. M. Schouten, J. C. de la Iglesia, O. Mallada, R. Santamaria, J. Inst Mikrotech Mainz GmbH D-55129 Mainz Germany Eindhoven Univ Technol NL-5600 MB Eindhoven Netherlands Univ Zaragoza E-50009 Zaragoza Spain

This review on selective oxidations is split into two parts. The first part concerns catalytic gas-phase oxidation reactions in micro-reactors, typically being performed in wall-coated micro-channels [v. Hessel, G. Kolb, J.C. Schouten, v. Cominos, C. Hofmann, H. Lowe, G. Nikolaidis, R. Zapf, A. Ziogas, E.R. Delsman, M.H.J.M. de Croon, O. de la Iglesia, R. Mallada, J. Santamaria, in: S. Ernst, E. Gallei, J.A. Lercher, Rossini, E. Santacesaria (Eds.), conference pre-prints of the DGMK/SCI-conference "Oxidation and Functionalization: Classical and Alternative Routes and Sources", Milan, Italy, October 12-14, 2005 [1] (see also acknowledgements at the end of the article)]. Liquid and gas-liquid oxidations are not included due to their different reactor design and way of processing. This comprises process development for fine chemical intermediates or bulk chemicals. By example of different reactions, the benefits of micro-chemical process engineering are shown. While there are numerous engineering reasons, one major driver is the increase of selectivity by diminishing side and follow-up reactions, most often the total oxidation to carbon dioxide, through preventing or at least decreasing hot spot formation. Another major advantage of micro-reactors is that mass-transfer resistances can be suppressed, thereby giving access to intrinsic kinetics. In the second part, we describe selective oxidation as one gas purification step in the framework of fuel processing for fuel cells, which is most often termed preferential oxidation in this context. Here, the selectivity towards carbon monoxide formation by diminishing the hydrogen oxidation is a major driver. The current developments are grouped so that all facets from kinetic modelling, heat transfer studies, catalyst testing, reactor and integrated-system engineering up to process engineering, exergy analysis, performance benchmarking and operation under real-case process flows are covered. (c) 2006 Elsevier B.v. All rights r

关键词： catalytic reactor micro-channels oxidation

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TileCal optical multiplexer board 9U prototype

TileCal optical multiplexer board 9U prototype

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2007 15th IEEE-NPSS Real-Time conference, RT

作者： valero, A. Abdallah, J. Castillo, v. Cuenca, C. Ferrer, A. Fullana, E. González, v. Higon, E. Poveda, J. Ruiz-Martínez, A. Salvachua, B. Sanchis, E. Solans, C. Torres, J. vails, J.A. IEEE Edificio Institutosde Investigación Paterna 46071 Valencia Spain Department of Electronic Engineering University of Valencia Burjassot 46100 Valencia Spain

ISBN: (纸本)1424408679

This paper presents the architecture and the status of the optical Multiplexer Board (OMB) for the ATLAS/LHC Tile hadronic calorimeter (TileCal). This board will analyze the front-end data CRC to prevent bit and burst errors produced by radiation. Besides, due to its position within the data acquisition chain it will be used to emulate front-end data for tests. The first two prototypes of the final OMB 9U version have been produced at CERN. Detailed design issues and manufacture features of these prototypes are described. These prototypes are being validated whereas some firmware developments are being implemented in the programmable devices of the board. Functional descriptions of the board on its two main operation modes as CRC checking and data ROD injector are explained as well as other functionalities. Finally, the schedule for next year when the production of the OMB will be take place is also presented. © 2007 IEEE.

关键词： Data acquisition

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design and fabrication of integrated 15 optical phased array switch on InP

Design and fabrication of integrated 15 optical phased array...

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20th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS

作者： Tanemura, T. Takenaka, M. Abdullah, A. Takeda, K. Shioda, T. Sugiyama, M. Nakano, Y. Research Center for Advanced Science and Technology University of Tokyo 4-6-1 Komaba Meguro-Ku Tokyo 153-8904 Japan Department of Electronic Engineering School of Engineering University of Tokyo Department of Electrical Engineering School of Engineering University of Tokyo Institute of Engineering Innovation School of Engineering University of Tokyo

An integrated semiconductor 15 optical phased-array switch is designed and demonstrated for the first time. Using the carrier-induced refractive index change in the InGaAsP bulk layer, we achieve successful switching ... 详细信息

ISBN: (纸本)142440925X

关键词： III-v semiconductors

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Ti-2007 - Proceedings of the 11th World conference on Titanium

Ti-2007 - Proceedings of the 11th World Conference on Titani...

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11th World conference on Titanium, Ti-2007

ISBN: (纸本)9784889034066

The proceedings contain 405 papers. The topics discussed include: current status of titanium production, research and applications in CIS;Recent titanium research and development in Germany;challenges for the development of titanium in France and in the European industry;recent developments in the research, production and application of titanium in Japan;chlorination of titanium oxycarbide produced by carbothermal reduction of rutile;synthesis of titanium oxycarbide by carbothermal reduction of titania in different gas atmospheres;progress in wrought processing of titanium;FEM simulation of microstructure evolution during hot forging process of a small-scale titanium alloy wing-panel;a numerical study of the influence of stirring parameters on titanium ingot quality using SOLAR v4.2;semisolid forging of titanium alloy making use of rapid resistance heating;and integrated computer-aided design and engineering during manufacture of Ti alloy die forging.

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Ti-2007 - Proceedings of the 11th World conference on Titanium

Ti-2007 - Proceedings of the 11th World Conference on Titani...

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11th World conference on Titanium, Ti-2007

ISBN: (纸本)9784889034066

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A design of real time image capturing and processing system using Texas instrument's processor

A design of real time image capturing and processing system ...

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Multimedia Systems and Applications X

作者： Wee, Toon-Joo Chaisorn, Lekha Rahardja, Susanto Gan, Woon-Seng Institute for Infocomm Research Singapore 119613 Singapore School of EEE Nanyang Technology University Singapore 639798 Singapore

ISBN: (纸本)9780819469373

In this work, we developed and implemented an image capturing and processing system that equipped with capability of capturing images from an input video in real time. The input video can be a video from a PC, video camcorder or DvD player. We developed two modes of operation in the system. In the first mode, an input image from the PC is processed on the processing board (development platform with a digital signal processor) and is displayed on the PC. In the second mode, current captured image from the video camcorder (or from DvD player) is processed on the board but is displayed on the LCD monitor. The major difference between our system and other existing conventional systems is that image-processing functions are performed on the board instead of the PC (so that the functions can be used for further developments on the board). The user can control the operations of the board through the Graphic User Interface (GUI) provided on the PC. In order to have a smooth image data transfer between the PC and the board, we employed Real Time Data Transfer (RTDX™) technology to create a link between them. For image processing functions, we developed three main groups of function: (1) Point Processing;(2) Filtering and;(3) 'Others'. Point Processing includes rotation, negation and mirroring. Filter category provides median, adaptive, smooth and sharpen filtering in the time domain. In 'Others' category, auto-contrast adjustment, edge detection, segmentation and sepia color are provided, these functions either add effect on the image or enhance the image. We have developed and implemented our system using C/C# programming language on TMS320DM642 (or DM642) board from Texas Instruments (TI). The system was showcased in College of engineering (CoE) exhibition 2006 at Nanyang Technological University (NTU) and have more than 40 users tried our system. It is demonstrated that our system is adequate for real time image capturing. Our system can be used or applied for application

关键词： Real time systems

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