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Energy & Environmental Materials 2024年第6期7卷 332-341页

作者： Manpreet Kaur Avinash Alagumalai Omid Mahian Sameh M.Osman Tadaaki nagao Zhonglin Wang Research Center for Materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS)1-1 NamikiTsukuba 305-0044IbarakiJapan Department of Chemical and Petroleum Engineering University of Calgary2500 University Dr.NWCalgaryAB T2N 1N4Canada Department of Mechanical Engineering GMR Institute of TechnologyRajamAndhra Pradesh 532127India Faculty of Mechanical Engineering and Mechanics Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and PipelineNingbo UniversityNingbo 315211China Department of Chemical Engineering Imperial College LondonLondon SW72AZUK Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 100083China Chemistry Department College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia Department of Condensed Matter Physics Hokkaido UniversitySapporoHokkaido 060-0810Japan School of Materials Science and Engineering Georgia Institute of TechnologyAtlanta 30332GAUSA Laboratory on Convective Heat and Mass Transfer Tomsk State UniversityTomsk 634045Russia

Due to the push for carbon neutrality in various human activities,the development of methods for producing electricity without relying on chemical reaction processes or heat sources has become highly ***,the challenge lies in achieving microwatt-scale outputs due to the inherent conductivity of the materials and diverting electric *** address this challenge,our research has concentrated on utilizing nonconductive mediums for water-based low-cost microfibrous ceramic wools in conjunction with a NaCl aqueous solution for power *** main source of electricity originates from the directed movement of water molecules and surface ions through densely packed microfibrous ceramic wools due to the effect of dynamic electric double *** occurrence bears resemblance to the natural water transpiration in plants,thereby presenting a fresh and straightforward approach for producing electricity in an ecofriendly *** generator module demonstrated in this study,measuring 12×6 cm^(2),exhibited a noteworthy open-circuit voltage of 0.35 V,coupled with a short-circuit current of 0.51 *** low-cost ceramic wools are suitable for ubiquitous,permanent energy sources and hold potential for use as self-powered sensors and systems,eliminating the requirement for external energy sources such as sunlight or heat.

关键词： ceramic microfibers energy harvesting power generation self-powered systems water evaporation

Operationally Simple Enantioselective Silane Reduction of Ketones by the [Ir(OMe)(cod)]₂/Azolium Catalytic System

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International Journal of Organic Chemistry 2024年第1期14卷 1-19页

作者： Satoshi Sakaguchi Chika nagao Ryo Ichihara Shogo Matsuo Department of Chemistry and Materials Engineering Faculty of Chemistry Materials and Bioengineering Kansai University Suita Japan

An operationally simple protocol was designed for the enantioselective silane reduction (ESR) of ketones using air- and moisture-stable [Ir(OMe)(cod)]2 (cod = 1,5-cyclooctadiene) (3) as a metal catalyst precursor. This reaction was driven by chiral hydroxyamide-functionalized azolium salt 2. The catalytic ESR reaction could be performed under benchtop conditions at room temperature. Treatment of 2 with 3 in THF yielded the monodentate IrCl(NHC)(cod) (NHC = N-heterocyclic carbene) complex 4 in 93% yield, herein the anionic methoxy ligand of 3 serves as an internal base that deprotonates the azolium ring of 2. The well-defined Ir complex 4 catalyzed the ESR reaction of propiophenone (6) with (EtO)2MeSiH using the pre-mixing reaction procedure. Based on this success, the catalytic ESR reaction was designed and implemented using an in situ-generated NHC/Ir catalyst derived from 2 and 3. Thus, a wide variety of aryl ketones could be reduced to the corresponding optically active alcohols in moderate to excellent stereoselectivities at room temperature without temperature control. Since the high catalytic activity of 3 was observed, we next evaluated several other transition metal catalyst precursors for the catalytic ESR reaction under the influence of 2. This evaluation revealed that Ir(acac)(cod) (acac = acetylacetonate) (28) and [IrCl(cod)]2 (5) can be successfully used as metal catalyst precursors in the ESR reaction.

关键词： Asymmetric Catalysis Enantioselective Reduction Hydrosilylation Reaction N-Heterocyclic Carbene Iridium

Influences of Horticultural Therapy and Functional Recovery Training at a Day-Care Center for the Elderly and Text Mining of Care Records by AI

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Open Journal of Therapy and Rehabilitation 2024年第2期12卷 117-131页

作者： Seigo Koura Shinya Matsutani Kazuho nagao Yu Fukushima Akiko Ikeda Takeshi Oshikawa Tomohiro Inagaki Kentaro Higashi Faculty of Graduate School Postdoctoral Course in Health Care Medicine Nishikyusyu University Kanzaki Japan Social Welfare Corporation Kanjikai Miyakonojyo Japan Sophia Phyto-Therapy College Tokyo Japan

Background: In Japan, due to the COVID-19 pandemic, various behavioral restrictions were implemented from March 2020, resulting in an increased number of elderly people with reduced participation in care and rehabilitation. As a result, the decline in motor and cognitive functions became more pronounced. Purpose: The study examined how activities combining passive horticultural therapy, which is always introduced, with active functional recovery training, which is used in the functional recovery training of patients with hemiplegia, influence the behavior of elder people using the facility. Methods: 36 elder people with care need 1 or 2 who regularly used the day-care facilities after the pandemic ended and who agreed to participate in the study was included. The assessment data were every three months from December 2021 to December 2023 after the COVID-19 pandemic, the MMSE and Moca-J, TMIG-Index, and GDS15. AI-based text mining was used to compare changes in visit reports before and after the introduction of the Posture Chart and Red Code, and the relationship between the language used. Results: The results of MMSE and Moca-J were both significantly higher in Group B and C than in Group A. TIMG assessment, was significantly higher in Group B and C than in Group A, and Group C was significantly higher than Group B. The GDS, an assessment of depression in old age, tended to be significantly higher in Group A than in Groups B and C. In the “Co-Occurrence Network Analysis” shown after the introduction of the latest functional recovery training equipment such as the Red Cord, its results showed a high association between the words Bathing and CARE and words such as POSTURE, Red-Code, and AI, App, which are used in functional training and rehabilitation, and their analysis. Conclusion: At day-care facilities specializing in functional recovery training and rehabilitation, a combination of horticultural therapy and the latest functional training equipment found to help m

关键词： Horticultural Therapy Hand Care Treatment Senior Day-Care Center Functional Recovery Training KH-Corder

Ore-forming mechanism for the Xiaoxinancha Au-rich Cu deposit in Yanbian,Jilin Province,China:Evidence from noble gas isotope geochemistry of fluid inclusions in minerals

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Science China Earth Sciences 2008年第2期51卷 216-228页

作者： KEISUKE nagao HIROCHIKA Sumino Laboratory for Earthquake Chemistry Graduate School of Science The University of Tokyo Tokyo 7-3-1 Japan

The Xiaoxinancha Au-rich copper deposit is one of important Au-Cu deposits along the continental margin in Eastern China. The deposit consists of two sections: the Beishan mine (North), composed of altered rocks with veinlet-dissemination sulfides and melnicovite-dominated sulfide-quartz veins, and the Nanshan mine (South), composed of pyrrhotite-dominated sulfide-quartz veins and pure sulfide veins. The isotope compositions of noble gases extracted from fluid inclusions in ore minerals, i.e. ratios of 3He/4He, 20Ne/22Ne and40Ar/36Ar are in the ranges of 4.45―0.08 Ra, 10.2―8.8 and 306―430, respectively. Fluid inclusions in minerals from the Nanshan mine have higher 3He/4He and 20Ne/22Ne ratios whereas those from the Beishan mine have lower 3He/4He ratios. The analysis of origin, and evolution of the ore fluids and its relations with the ore-forming stages and the ages of mineralization suggests that the initial hydrothermal fluids probably come from the melts generated by partial melting of oceanic crust with the participation of fluids from the mantle (mantle-plume type)/aesthenosphere. This also corresponds to the continental margin settings during the subduction of Izanagi ocaneic plate towards the palaeo-Asian continent (123―102 Ma). The veinlet-dissemination ore bodies of the Beishan mine were formed through replacement and crystallization of the mixed fluids generated by mixing of the ascending high-temperature boiling fluid with young crustal fluid whereas the melnicovite-dominated sulfide-quartz veins were formed subsequently by filling of the high-temperature ore fluid in fissures. Pyrrhotite-dominated sulfide-quartz veins in the Nanshan mine were formed by filling-deposition-crystallization of the moderate-temperature ore fluids and the pure sulfide veins were formed later by filling-deposition-crystallization of ore substance-rich fluids after boiling of the moderate-temperature ore fluids. The metallogenic dynamic processes can be summarized as: (1) form

关键词： Au-rich Cu deposit fluid inclusion He-Ne-Ar isotopes ore-forming mechanism Xiaoxinancha Yanbian

Numerical Study of Shock Tube Flows with Homogeneous and Heterogeneous Condensations in Rarefaction Wave

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Journal of Thermal Science 2010年第4期19卷 326-331页

作者： Junji nagao Shigeru Matsuo Toshiaki Setoguchi Heuy Dong Kim Graduate School of Science & Engineering Saga University1 Honjo-machiSaga-shiSaga840-8502Japan Department of Advanced Technology Fusion Saga University1 Honjo-machiSaga-shiSaga 840-8502Japan Institute of Ocean Energy Saga University1 Honjo-machiSaga-shiSaga 840-8502Japan. School of Mechanical Engineering Andong National University388Songcheon-dongAndong 760-749Korea

Shock tubes are devices in which the state of a gas is changed suddenly from one uniform state to another by the passage of shock and expansion *** the theory of ideal shock tube flow,it is customarily assumed that the unsteady expansion and shock waves generated by diaphragm rupture are a perfectly centered plane ***, such waves are generally not centered,or may not even by plane in *** the present research,the time-dependent behavior of homogeneous and heterogeneous condensation of moist air in the shock tube is investigated by using a computational fluid dynamics ***,the numerical and experimental studies were carried out in order to investigate the effect of the diaphragm rupture process on the flow characteristics of expansion and shock waves generated near the diaphragm.

关键词： shock tube homogeneous condensation heterogeneous condensation diaphragm rupture

Control of Transonic Flow Fields Using Local Occurrence of Non-Equilibrium Condensation

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Journal of Thermal Science 2013年第4期22卷 327-332页

作者： Junji nagao Shigeru Matsuo Tokitada Hashimoto Toshiaki Setoguchi Heuy Dong Kim Department of Advanced Technology Fusion Saga University Institute of Ocean Energy Saga University School of Mechanical Engineering Andong National University

Control of supersonic flow fields with shock wave is important for some industrial fields. There are many studies for control of the supersonic flow fields using active or passive control. When non-equilibrium condensation occurs in a supersonic flow field, the flow is affected by latent heat released. Many studies for the condensation have been conducted and the characteristics have been almost clarified. Further, it was found that non-equilibrium condensation can control the flow field. In these studies, the condensation occurs across the passage of the flow field and it causes the total pressure loss in the flow field. However, local occurrence of non-equilibrium condensation in the flow field may change the characteristics of total pressure loss compared with that by the condensation across the passage of the nozzle and there are few for researches of locally occurred non-equilibrium condensation in supersonic flow field. The purpose in the present study is to clarify the effect of local occurrence of non-equilibrium condensation on the transonic flow field in a nozzle with a circular bump. As a result, local occurrence of non-equilibrium condensation reduced the shock strength and total pressure loss in the transonic flow field by flowing the moist air from trailing edge of the circular bump to the mainstream.

关键词： Compressible flow Transonic flow Shock wave Non-equilibrium condensation Circular bump

Moisture Detection of SF_6 Gas Instruments by Solid Electrolyte

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稀有金属材料与工程 2006年第A3期35卷 353-356页

作者： Eiichi nagao Tadao Minagawa Chieko Nishida Mitsuhito Kamei Mitsubishi Electric Corporation 8-1-1Tsukaguchi-HonmachiAmagasakiHyogo661-8661Japan

Humidity measurement in a very low moisture atmosphere was studied by using solid electrolyte film coated with porous electrodes,considering its application to the moisture monitoring of SF_6 gas-insulated high voltage instruments such as gas-insulated switchgear (GIS) and gas circuit breakers (GCBs).Compared to the AC impedance values measured in an ambient atmosphere where the moisture atmosphere is far higher than that in these instruments,considerably large impedance values were obtained in a very low moisture *** impedance was systematically measured in accordance with the conditions of these instruments whose moisture contents were less than 1 000×10^(-6).A good correlation was obtained between the impedance values and the moisture *** frequency characteristics of the impedance were analyzed based on a conventional equivalent circuit where a number of CR circuits were connected in *** the dielectric relaxation of each circuit,it was found that the frequency characteristics of the impedance can be explained by the equivalent circuit. Two semicircles were clearly obtained in the Cole-Cole impedance plot which are thought to reflect the impedance characteristics of the film and the *** AC impedance can be a good indicator of the moisture content of SF_6 gas-insulated high voltage instruments.

关键词： humidity moisture solid electrolyte impedance ion conductivity

An Accurate and Safe Small Raman Gain Measurement for Installed Fiber Optic Cables

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光学学报 2003年第S1期23卷 571-572页

作者： Takayuki Miyakawa Yasuyuki nagao KDDI R&D Laboratories Inc. 2-1-15 Ohara Kamifukuoka-shi Saitama JapanKDDI R&D Laboratories Inc. 2-1-15 Ohara Kamifukuoka-shi Saitama Japan

Novel small Raman gain measurement method for installed fiber optic cables using a modulated pump light is proposed. We have demonstrated accurate Raman gain measurement in small Raman gain less than 1dB and we also m... 详细信息

关键词： for in as In be An Accurate and Safe Small Raman Gain Measurement for Installed Fiber Optic Cables FRA of

Control of the Asymmetric Flow in Rocket Nozzles

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Journal of Thermal Science 2013年第2期22卷 97-102页

作者： Shigeru Matsuo Shotaro Suetsugu Junji nagao Tokitada Hashimoto Toshiaki Setoguchi Heuy Dong Kim Department of Advanced Technology Fusion Saga University Graduate School of Science & Engineering Saga University Institute of Ocean Energy Saga University School of Mechanical Engineering Andong National University

In some rocket nozzle flows, the existence of the transition from FSS to RSS and the occurrence of asymmetric flow are known in previous researches. As a result, the transition causes excessive side-loads that may damage the nozzle. Thus, it is important to investigate the method in order to control the asymmetric flow separation. In the present study, the relationship between the asymmetric separation and the rate of change of the pressure ratio with time was investigated from the point of view of the transition from FSS to RSS in the supersonic nozzle experimentally. Further, change of the flow separation by using step and cavity, and the possibility of the control was demonstrated. As a result, it was shown that the method using a cavity was effective for the control of the separation pattern.

关键词： Compressible flow Asymmetric shock wave Rocket nozzle Control Experiment