Agent Based Routing Control for Multi Mobile Robots in Transportation

Auto Guided Vehicles (AGVs) are widely used in a semi-conductor fabricating factory and contribute to the stable production of a high quality semi-conductor products. In the near future, further expansion of the transportation system is expected accompanied with the rapid growth of semi-conductor industries. In such situation, the necessity of performing quick planning of transportation route and transportation control will be elevated. In this paper, practicable planning of the transportation route and transportation control are studied based on the decentralized agent method. Especially, the geometrical sizes of AGVs are considered in the determination of transportation routes and control strategy avoiding the occurrence of mutual collisions or deadlock of AGVs

A novel method for combating dispersion induced power fading in dispersion compensating fiber

\u3cp\u3eWe experimentally investigate the performance of 60 GHz double sideband (DSB) radio over fiber (RoF) links that employ dispersion compensating fiber (DCF). Error free transmission of 3 Gbps signals over 1 m of wireless distance is reported. In order to overcome experimentally observed chromatic dispersion (CD) induced power fading of radio frequency (RF) signal, we propose a method for improvement of RF carrierto- noise (C/N) ratio through introduction of a degree of RF frequency tunability. Overall results improve important aspects of directly modulated RoF systems and demonstrate the feasibility of high carrier frequency and wide bandwidth RF signals delivery in RoF links including DCF fiber. Error free performance that we obtain for 3 Gbps amplitude shift-keying (ASK) signals enables uncompressed high-definition 1080p video delivery.\u3c/p\u3

Recent Advances in Ultra-High-Speed Optical Signal Processing

We review recent advances in the optical signal processing of ultra-high-speed serial data signals up to 1.28 Tbit/s, with focus on applications of time-domain optical Fourier transformation. Experimental methods for the generation of symbol rates up to 1.28 Tbaud are also described.</p

Chromatic dispersion compensation and coherent Direct-Sequence OCDMA operation on a single super structured FBG

This paper was published in OPTICS EXPRESS and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.20.013966 . Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under lawWe have proposed, fabricated and demonstrated experimentally a set of Coherent Direct Sequence-OCDMA en/decoders based on Super Structured Fiber Bragg Gratings (SSFBGs) which are able to compensate the fiber chromatic dispersion at the same time that they perform the en/decoding task. The proposed devices avoid the use of additional dispersion compensation stages reducing system complexity and losses. This performance was evaluated for 5.4, 11.4 and 16.8 km of SSMF. The twofold performance was verified in Low Reflectivity regime employing only one GVD compensating device at decoder or sharing out the function between encoder and decoder devices. Shared functionality requires shorter SSFBGs designs and also provides added flexibility to the optical network design. Moreover, dispersion compensated en/decoders were also designed into the High Reflectivity regime employing synthesis methods achieving more than 9 dB reduction of insertion loss for each device. © 2012 Optical Society of America.This work was supported by the Spanish Government project TEC 2009-12169, and the Valencian Government under the projects ACOMP/2012/023 and FPA/2012/009.Baños López, R.; Pastor Abellán, D.; Amaya Ocampo, WA.; García Muñoz, V. (2012). Chromatic dispersion compensation and coherent Direct-Sequence OCDMA operation on a single super structured FBG. Optics Express. 20(13):13966-13976. doi:10.1364/OE.20.013966S13966139762013Kitayama, K., Xu Wang, & Naoya Wada. (2006). OCDMA over WDM PON-solution path to gigabit-symmetric FTTH. Journal of Lightwave Technology, 24(4), 1654-1662. doi:10.1109/jlt.2006.871030Xu Wang, & Naoya Wada. (2006). Experimental demonstration of OCDMA traffic over optical packet switching network with hybrid PLC and SSFBG en/decoders. Journal of Lightwave Technology, 24(8), 3012-3020. doi:10.1109/jlt.2006.878287Sotobayashi, H., Chujo, W., & Kitayama, K. (2002). Transparent virtual optical code/wavelength path network. IEEE Journal of Selected Topics in Quantum Electronics, 8(3), 699-704. doi:10.1109/jstqe.2002.1016375Pastor, D., Amaya, W., García-Olcina, R., & Sales, S. (2007). Coherent direct sequence optical code multiple access encoding-decoding efficiency versus wavelength detuning. Optics Letters, 32(13), 1896. doi:10.1364/ol.32.001896Wang, X., Matsushima, K., Nishiki, A., Wada, N., & Kitayama, K. (2004). High reflectivity superstructured FBG for coherent optical code generation and recognition. Optics Express, 12(22), 5457. doi:10.1364/opex.12.005457Pastor, D., Amaya, W., & Garcia-Olcina, R. (2007). Design of high reflectivity superstructured FBG for coherent OCDMA employing synthesis approach. Electronics Letters, 43(15), 824. doi:10.1049/el:20071171Skaar, J., Ligang Wang, & Erdogan, T. (2001). On the synthesis of fiber Bragg gratings by layer peeling. IEEE Journal of Quantum Electronics, 37(2), 165-173. doi:10.1109/3.903065Amaya, W., Pastor, D., Baños, R., & Garcia-Munoz, V. (2011). WDM-Coherent OCDMA over one single device based on short chip Super structured fiber Bragg gratings. Optics Express, 19(24), 24627. doi:10.1364/oe.19.024627Amaya, W., Pastor, D., & Capmany, J. (2008). Modeling of a Time-Spreading OCDMA System Including Nonperfect Time Gating, Optical Thresholding, and Fully Asynchronous Signal/Interference Overlapping. Journal of Lightwave Technology, 26(7), 768-776. doi:10.1109/jlt.2007.91520

葉酸およびCitrovorum factorの代謝に関する実験的研究

京都大学0048新制・課程博士医学博士医博第56号新制||医||16(附属図書館)171京都大学大学院医学研究科内科系専攻(主査)教授 脇坂 行一, 教授 三宅 儀, 教授 前川 孫二郎学位規則第5条第1項該当Kyoto UniversityDA