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Evaluation of Voltage Control Effect for Data Acquisition Period Length from SCADA with IT Switches
Udagawa, Tsuyoshi,Yasuhiro, Hayashi,Takahashi, Naoyuki,Matsuura, Yasuo,Morita, Tomohiko,Minami, Masahiro The Korean Institute of Electrical Engineers 2013 The Journal of International Council on Electrical Vol.3 No.2
Measured data from IT switches are utilized in order to control voltage in Japanese distribution systems with photovoltaic generation systems. However, length of period from the data measurement to the data acquisition from IT switches by SCADA affects voltage control ability in a distribution automation system. In this paper, the effect of the length of the data acquisition period for voltage control by LRT and SVR is evaluated through numerical simulations in a distribution system model. Furthermore, the optimal length of the data acquisition period is determined according to PV penetration rate.
Udagawa, Takashi The Korea Association of Crystal Growth 2001 韓國結晶成長學會誌 Vol.11 No.5
Metal-organic VPE (MOVPE) epitaxial growth procedure and related device fabrication technique are reported for GaInP-based epitaxial materials and devices. For GaInP/GaInAs two-dimensional electron-gas field-effect transistor (TEGFET), a promising epitaxial stacking structure resulting in enhanced electron mobility is given. In conjunction with this, a new device fabrication technique to improve luminous intensity of GaInP-based LED is also shown.
Udagawa, T.,Swanger, Sharon A.,Takeuchi, K.,Kim, J.,Nalavadi, V.,Shin, J.,Lorenz, Lori J.,Zukin, R.,Bassell, Gary J.,Richter, Joel D. Cell Press 2012 Molecular cell Vol.47 No.2
Translational control of mRNAs in dendrites is essential for certain forms of synaptic plasticity and learning and memory. CPEB is an RNA-binding protein that regulates local translation in dendrites. Here, we identify poly(A) polymerase Gld2, deadenylase PARN, and translation inhibitory factor neuroguidin (Ngd) as components of a dendritic CPEB-associated polyadenylation apparatus. Synaptic stimulation induces phosphorylation of CPEB, PARN expulsion from the ribonucleoprotein complex, and polyadenylation in dendrites. A screen for mRNAs whose polyadenylation is altered by Gld2 depletion identified >100 transcripts including one encoding NR2A, an NMDA receptor subunit. shRNA depletion studies demonstrate that Gld2 promotes and Ngd inhibits dendritic NR2A expression. Finally, shRNA-mediated depletion of Gld2 in vivo attenuates protein synthesis-dependent long-term potentiation (LTP) at hippocampal dentate gyrus synapses; conversely, Ngd depletion enhances LTP. These results identify a pivotal role for polyadenylation and the opposing effects of Gld2 and Ngd in hippocampal synaptic plasticity.
T.Udagawa,G.Shimaoka 한양대학교 세라믹연구소 2003 Journal of Ceramic Processing Research Vol.4 No.2
Crystallographic features of boronmonophosphide (BP) semiconducting layers grown directly on (111)Si by a triethylboran/ phosphine atmospheric-pressure MOCVD system were investigated by X-ray diffraction and transmission electron diffraction (TED) techniques. The unintentionally-doped BP layers grown at 1025oC with an input PH3/(C2H5)3B ratio of about 150 had transparent mirror (111) surfaces with an orientation relationship of (111)[110]BP//(111)[110]Si. At the hetero-interface between the MOCVD-grown BP layer and the Si substrate, an amorphous thin layer containing Si, P, and O (oxygen) was formed. In addition to these features, TED pattern revealed that the BP layer consisted of {111} twins. The MOCVD-grown BP layers showed p-type conductivity with a carrier concentration of 6.3´1019 cm-3 and with room temperature mobility of 70 cm2/Vs.