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LiNbO_3 based optical devices for fiber communication

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The Journal of China Universities of Posts and Telecommunications 2009年第4期16卷 12-15页

作者： junichiro Ichikawa New Technology Research Laboratory Sumitomo Osaka Cement Co. Ltd. 585 Toyotomi-choFunabashi-shi

Lithium niobate （LiNbO3） is a useful photonic material for its electro-optic and nonlinear optical properties. In this paper, I will report developments of LiNbO3 based optical devices for fiber communication, inclu... 详细信息

关键词： LiNbo3 nonlinear optical property ARW-PPLN birefringent phase matching (BPM) quasi phase matching (QPM)

Robust combined modeling of crystalline and amorphous silicon grain boundary conductance by machine learning

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npj Computational Materials 2022年第1期8卷 2099-2106页

作者： Chayaphol Lortaraprasert junichiro Shiomi Department of Mechanical Engineering The University of TokyoTokyoJapan Institute of Engineering Innovation The University of TokyoTokyoJapan

Knowledge in thermal and electric transport through grain boundary(GB)is crucial for designing nanostructured thermoelectric materials,where the transport greatly depends on GB atomistic *** this work,we employ machine learning(ML)techniques to study the relationship between silicon GB structure and its thermal and electric boundary conductance(TBC and EBC)calculated by Green’s function *** present a robust ML prediction model of TBC covering crystalline–crystalline and crystalline–amorphous interfaces,using disorder descriptors and atomic *** also construct high-accuracy ML models for predicting both TBC and EBC and their ratio,using only small data of crystalline *** found that the variations of interatomic angles and distance at GB are the most predictive descriptors for TBC and EBC,*** results demonstrate the robustness of the black-box model and open the way to decouple thermal and electrical conductance,which is a key physical problem with engineering needs.

关键词： grain structure. crystalline

Engagement of membrane immunoglobulin enhances Id3 promoter activity in WEHI-231 B lymphoma cells

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Acta Pharmacologica Sinica 2005年第4期26卷 486-491页

作者： Kikumi HATA junichiro MIZUGUCHI Department of Immunology and Intractable Disease Research Center Tokyo Medical University 6-1-1 Shinjuku Shinjuku-ku 160-8402 Tokyo Japan Department of Immunology and Intractable Disease Research Center Tokyo Medical University 6-1-1 Shinjuku Shinjuku-ku 160-8402 Tokyo Japan

Aim:We have recently shown that engagement of membrane immunoglobulin(mIg)induced upregulation of inhibitor of differentiation 3(Id3)mRNA,resultingin growth arrest at G1 phase in WEHI-231 *** the present study,we examinedwhether engagement of mIg will affect promoter activity of the Id3 gene in WEHI-231 ***:DNA fragments corresponding to the 5'-flanking region ofmid3 gene were amplified by polymerase chain reaction(PCR)using genomicDNA as the *** DNA fragments upstream of the transcription startsite(+1)of the mid3 gene were subcloned into the luciferase reporter vector *** recombinant constructs were transiently transfected into WEHI-231 cellsby an electroporation *** incubation for 24 h,WEHI-231 cells werestimulated with 10 mg/L anti-IgM or irradiated CD40L-expressing NIH3T3 cells orcontrol NIH3T3 cells for further 24 h,followed by assay for luciferase ***:The luciferase analysis demonstrated that basal promoter activity of theId3 gene was found in the region between-200 and +*** Id3 promoter activitywas increased 2-fold following stimulation with anti-IgM,but not CD40L,com-pared with medium ***:The mIg-mediated upregulation of Id3expression is controlled,at least in part,through transcriptional regulation,asassessed by luciferase assay.

关键词： B lymphoma cells inhibitor of differentiation CD40L anti-IgM transcriptional control

RadonPy:automated physical property calculation using all-atom classical molecular dynamics simulations for polymer informatics

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npj Computational Materials 2022年第1期8卷 2155-2169页

作者： Yoshihiro Hayashi junichiro Shiomi Junko Morikawa Ryo Yoshida The Institute of Statistical Mathematics(ISM) Research Organization of Information and Systems10-3 Midori-choTachikawaTokyo190-8562Japan Department of Mechanical Engineering The University of Tokyo7-3-1 HongoBunkyoTokyo113-8656Japan Institute of Engineering Innovation The University of Tokyo2-11 YayoiBunkyo-kuTokyo113-0032Japan Department of Materials Science and Engineering School of Materials and Chemical TechnologyTokyo Institute of Technology2-12-1 OokayamaMeguro-kuTokyo152-8552Japan Research and Services Division of Materials Data and Integrated System(MaDIS) National Institute for Materials Science(NIMS)1-2-1 SengenTsukubaIbaraki305-0047Japan Department of Statistical Science School of Multidisciplinary ScienceThe Graduate University of Advanced Studies(SOKENDAI)10-3 Midori-choTachikawaTokyo190-8562Japan

The spread of data-driven materials research has increased the need for systematically designed materials property ***,the development of polymer databases has lagged far behind other material *** present RadonPy,an open-source library that can automate the complete process of all-atom classical molecular dynamics(MD)simulations applicable to a wide variety of polymeric ***,15 different properties were calculated for more than 1000 amorphous *** MD-calculated properties were systematically compared with experimental data to validate the calculation conditions;the bias and variance in the MD-calculated properties were successfully calibrated by a machine learning *** the high-throughput data production,we identified eight amorphous polymers with extremely high thermal conductivity(>0.4 W∙m^(–1)∙K^(–1))and their underlying *** to the advancement of materials informatics since the advent of computational property databases for inorganic crystals,database construction using RadonPy will promote the development of polymer informatics.

关键词： property calculation dynamics

Influence of inhabitant background on the physical changes of Banjarese houses： A case study in Kuin Utara settlement, Banjarmasin, Indonesia

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Frontiers of Architectural Research 2016年第4期5卷 412-424页

作者： Meidwinna Vania Michiani junichiro Asano Department of Architecture and Civil Engineering Toyohashi University of TechnologyToyohashi-shi 441-8122 Japan

The disappearance of vernacutar buitdings is a common phenomenon worldwide and in Indonesia. The Banjarese house, a type of Indonesian vernacutar architecture, is a typicat riverside dwetling that shows the strong relationship between the river and the inhabitants. In view of the number of Banjarese houses facing degradation as a riverside type of vernacutar architecture, a study is necessary. The characteristics of the inhabitants must be considered when observing the condition of the remaining houses. Therefore, this study aims to investigate the influence of inhabitant background on the physicat changes of Banjarese houses for future revitatization. A research was conducted in the embryo of Banjarmasin atong the Kuin riverside setttement in Kuin Utara sub-district through a door-to-door survey with a questionnaire. The exploration indicates the following：（1） the original form of art remaining houses has been attered, （2） most of the inhabitants are ctassified as a tow-income society, （3） the different characteristics of the present inhabitants change the physicat condition of houses, （4） the retationship of the current house condition to the socio-cutture and economy of the inhabitants prays a prominent rote in revitatizing Banjarese houses as a vatuabte asset.

关键词： Banjarese house Vernacular house House physicalchanse Inhabitant character-istics Socio-culture andeconomy

Physical upgrading plan for slum riverside settlement in traditional area:A case study in Kuin Utara,Banjarmasin,Indonesia

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Frontiers of Architectural Research 2019年第3期8卷 378-395页

作者： Meidwinna Vania Michiani junichiro Asano Department of Architecture and Civil Engineering Toyohashi University of TechnologyToyohashiAichi4418122Japan

This study aims to draw basic and global concepts for the physical improvement of slum riverside settlements as a fundamental step toward formalizing and securing ***,this work specifies attempts to arrange an upgrading plan derived from the basic strategy for our target location in the traditional settlement of Kuin Utara without failing to recognize its uniqueness and cultural *** paper discloses that the basic concept for physical upgrading in a slum settlement consists of three elements:(1)arranging street networks as fundamental systems that structure the settlement,(2)constructing public utility systems that are essential for livelihoods,and(3)providing common space and amenities as"external organs”that form identities and reveal the physical beauty of the *** proposed infrastructures shall be directed to protect the local cultures and sociocultural activities of the *** plan should also be adjusted with respect to the economic constraints in developing ***,the improvement strategy for poor housings shall not orientate to modernization merely for beautification without considering the basic aspect:maintaining the dweller’s livelihood.

关键词： Slum Riverside settlement improvement plan Physical upgrading

Reactivity improvement of ilmenite by calcium nitrate melt infiltration for Chemical Looping Combustion of biomass

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Carbon Resources Conversion 2019年第1期2卷 51-58页

作者： Martin Keller Hikaru Oka junichiro Otomo Graduate School of Frontier Sciences The University of Tokyo5-1-5 KashiwanohaKashiwa-shiChiba 277-8563Japan

Chemical Looping Combustion is a novel process that generates sequestration-ready CO_(2) from the combustion of woody biomass without requiring a gas separation step and without diluting the CO_(2) with N_(2) from *** is achieved by oxidizing the fuel with lattice oxygen of a metal oxide oxygen *** using cheap and abundant ilmenite ore(FeTiO3)as the oxygen carrier,the rather low reactivity towards volatiles released from the biomass upon devolatilization,as well as detrimental structural changes due to a segregation of Fe and Ti in the material,are of *** issues can be addressed by modifying ilmenite with Ca via melt *** this work,we demonstrate that this modification results in a good distribution of Ca throughout the ilmenite particles that a)prevents detrimental Fe/Ti segregation,b)improves the mechanical stability of the particle compared to materials prepared by solution impregnation and c)improves the reactivity of this material towards hydrogen and wet ***,fixed bed experiments showed that the Ca modification not only resulted in increased methane conversion,but also in an increased degree of oxidation of gaseous intermediates CO and *** thus conclude that the performance of ilmenite in Chemical Looping processes can be significantly enhanced by Ca modification of ilmenite either prior to use or in-situ during operation of this bed material with Ca-rich fuels such as woody biomass.

关键词： Carbon dioxide removal Chemical Looping Combustion Ilmenite Melt infiltration BECCS Biomass combustion

Study on an Undershot Cross-Flow Water Turbine

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Journal of Thermal Science 2014年第3期23卷 239-245页

作者： Yasuyuki Nishi Terumi Inagaki Yanrong Li Ryota Omiya junichiro Fukutomi Department of Mechanical Engineering Ibaraki University 4-12-1 Nakanarusawa-choHitachi-shi Ibaraki 316-8511JAPAN Graduate School of Science and Engineering Ibaraki University 4-12-1 Nakanarusawa-choHitachi-shi Ibaraki316-8511JAPAN Institute of Technology and Science The University of Tokushima 2-1 Minamijosanjima-cho Tokushima-shiTokushima 770-8506 JAPAN

This study aims to develop a water turbine suitable for ultra-low heads in open channels, with the end goal being the effective utilization of unutilized hydroelectric energy in agricultural water channels. We performed tests by applying a cross-flow runner to an open channel as an undershot water turbine while attempting to simplify the structure and eliminate the casing. We experimentally investigated the flow fields and performance of water tur- bines in states where the flow rate was constant for the undershot cross-flow water turbine mentioned above. In addition, we compared existing undershot water turbines with our undershot cross-flow water turbine after at- taching a bottom plate to the runner. From the results, we were able to clarify the following. Although the effec- tive head for cross-flow runners with no bottom plate was lower than those found in existing runners equipped with a bottom plate, the power output is greater in the high rotational speed range because of the high turbine ef- ficiency. Also, the runner with no bottom plate differed from rtmners that had a bottom plate in that no water was being wound up by the blades or retained between the blades, and the former received twice the flow due to the flow-through effect. As a result, the turbine efficiency was greater for runners with no bottom plate in the full ro- tational speed range compared with that found in runners that had a bottom plate.

关键词： Water Turbine Cross-Flow Turbine Open Channel Performance Flow Visualization

Tunable Separation of Single-Walled Carbon Nanotubes by Dual-Surfactant Density Gradient Ultracentrifugation

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Nano Research 2011年第7期4卷 623-634页

作者： Pei Zhao Erik Einarsson Georgia Lagoudas junichiro Shiomi Shohei Chiashi Shigeo Maruyama Department of Mechanical Engineering The University of Tokyo Tokyo 113-8656 Japan Global Center of Excellence for Mechanical Systems Innovation The University of Tokyo Tokyo 113-8656 Japan Department of Bioengineering Rice University Houston TX 77005 USA

We present a systematic study of the effects of surfactants in the separation of single-walled carbon nanotubes （SWNTs） by density gradient ultracentrifugation （DGU）. Through analysis of the buoyant densities, layer positions, and optical absorbance spectra of SWNT separations using the bile salt sodium deoxycholate （DOC） and the anionic salt sodium dodecyl sulfate （SDS）, we clarify the roles and interactions of these two surfactants in yielding different DGU outcomes. The separation mechanism described here can also help in designing new DGU experiments by qualitatively predicting outcomes of different starting recipes, improving the efficacy of DGU and simplifying post-DGU fractionation.

关键词： Single-walled carbon nanotubes density gradient ultracentrifugation sodium deoxycholate sodium dodecyl sulfate