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Characteristic of Local Boiling Heat Transfer of Ammonia and Ammonia/Water Binary Mixture on the Plate Type Evaporator

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Journal of Thermal Science 2011年第4期20卷 332-342页

作者： Akio OKAMOTO hirofumi ARIMA Yasuyuki IKEGAMI Titanium Division KOBE STEEL Ltd.Japan Institute of Ocean Energy Saga UniversityJapan

Power generation using small temperature difference such as ocean thermal energy conversion(OTEC)and discharged thermal energy conversion(DTEC)is expected to be the countermeasures against global warming *** ammonia and ammonia/water are used in evaporators for OTEC and DTEC as working fluids,the research of their local boiling heat transfer is important for improvement of the power generation *** of local boiling heat transfer coefficients were performed for ammonia/water mixture(z=0.9-1)on a vertical flat plate heat exchanger in a range of mass flux(7.5-15 kg/m2s),heat flux(15-23 kW/m 2),and pressure(0.7-0.9 MPa).The result shows that in the case of ammonia/water mixture,the local heat transfer coefficients increase with an increase of mass flux and composition of ammonia,and decrease with an increase of heat flux.

关键词： Local Heat Transfer Ammonia/Water Mixture Plate Type Evaporator OTEC

Implications of periostin in the development of subarachnoid hemorrhage-induced brain injuries

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Neural Regeneration Research 2017年第12期12卷 1982-1984页

作者： hirofumi Nishikawa Hidenori Suzuki Department of Neurosurgery Mie University Graduate School of Medicine Tsu Japan

Target of research in subarachnoid hemorrhage（SAH）：The outcome of aneurysmal SAH remains poor despite advances in the diagnosis and *** many factors related to patients,aneurysms,and institutions,as well as physiol... 详细信息

关键词： Implications of periostin the development subarachnoid hemorrhage-induced brain injuries

Effect of manufacturing methods of AgCl/Al_2O_3 catalyst on selective catalytic reduction of NO_x

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Journal of Environmental Sciences 2011年第6期23卷 1033-1037页

作者： Satoshi Kishida Dong-Ying Ju hirofumi Aritani Advanced Science Research Laboratory Saitama Institute of Technology 1690 Fusaiji Fukaya 369-0293 Japan Faculty of Engineering Saitama Institute of Technology 1690 Fusaiji Fukaya 369-0293 Japan Department of Life Science & Green Chemistry Saitama Institute of Technology 1690 Fusaiji Fukaya 369-0293 Japan

The AgCl/Al2O3 catalyst has potential for use in the selective catalytic reduction（SCR） of NOx.A compound hydrocarbon,following oxygenation is used as a type of reducing *** this experiment,the AgCl/Al2O3 catalyst was produced by four different methods,and the differences among their reduction catalysis of NOx were *** was used as a type of reducing agent.X-ray diffraction analysis was performed to study the crystalline structure and scanning electron microscope and transmission electron microscope（TEM） were applied to determine the *** results indicated that,in the range of 350-400℃,there was no significant difference on the NOx reduction rate;however,there was dispersion at high and low temperature *** size of the AgCl particles was about 20-100 nm.

关键词： AgCl/Al2O3 catalytic reduction SCR NOx

An Adjustable Variant of Round Robin Algorithm Based on Clustering Technique

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Computers, Materials & Continua 2021年第3期66卷 3253-3270页

作者： Samih M.Mostafa hirofumi aman. Faculty of Computers and Information South Valley UniversityQena83523Egypt Research Institute for Information Technology Kyushu UniversityFukuoka819-0395Japan

CPU scheduling is the basic task within any time-shared operating *** of the main goals of the researchers interested in CPU scheduling is minimizing time *** between CPU scheduling algorithms is subject to some scheduling criteria(e.g.,turnaround time,waiting time and number of context switches(NCS)).Scheduling policy is divided into preemptive and *** Robin(RR)algorithm is the most common preemptive scheduling algorithm used in the time-shared operating *** this paper,the authors proposed a modified version of the RR algorithm,called dynamic time slice(DTS),to combine the advantageous of the low scheduling overhead of the RR and favor short process for the sake of minimizing time *** process has a weight proportional to the weights of all *** process’s weight determines its time slice within the current *** authors benefit from the clustering technique in grouping the processes that are similar in their attributes(e.g.,CPU service time,weight,allowed time slice(ATS),proportional burst time(PBT)and NCS).Each process in a cluster is assigned the average of the processes’time slices in this cluster.A comparative study of six popular scheduling algorithms and the proposed approach on nine groups of processes vary in their attributes was performed and the evaluation was measured in terms of waiting and turnaround times,and *** experiments showed that the proposed algorithm gives better results.

关键词： Clustering CPU scheduling round robin turnaround time waiting time

Methane, Nitrous Oxide and Ammonia generation in full-scale swine wastewater purification facilities

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Frontiers of Environmental Science & Engineering 2017年第3期11卷 115-122页

作者： Takashi Osada Makoto Shiraishi Teruaki Hasegawa hirofumi Kawahara National Agriculture and Food Research Organization Tsukuba Ibaraki 305-0005 Japan Okayama Prefectural Center for Animal Husbandry Research Misaki Okayama 709-3401 Japan Chiba Prefectural Livestock Research Center Yachimata Chiba 289-1113 Japan Saga Prefectural Higashimastuura Agricultural Development and Extension Center Karatsu Saga 847-0861 Japan

The activated sludge process to remove nitrogen and biochemical oxygen demand （BOD） is reportedly cost-effective for swine wastewater treatment, and it use has thus increased in pig farming. Nitrous oxide （N20） is generated on farms as an intermediate product in nitrification and denitrification, and methane （CH4） is also generated from organic degradation under anaerobic conditions by microorganisms in manure or wastewater. This study was carried out at five activated sludge treatment facilities across Japan between August 2014 and January 2015. Measurements were conducted over several weeks at wastewater purification facilities for swine farms： two in Chiba prefecture （East Japan）, two in Okayama prefecture （West Japan）, and one in Saga （Southern Japan）. Taking several environmental fluctuations into account, we collected measurement data continuously day and night, during both high-temperature and low-temperature periods. The results indicated that CH4 and N20 emission factors were 0.91% （kgCHa·kg volatile solids^-1） and 2.87% （g N2O-N·kg total N^-1）, respectively. Ammonia emissions were negligible in all of the measurements from the wastewater facilities. The N20 emission factor calculated under this experiment was low compared to our previous finding （5.0%; g N2O-N·kg N^-1） in a laboratory experiment. In contrast, the CH4 emission factor calculated herein was rather high compared to the laboratory measurements. There was great variation in daily GHG emission factors measured in the actual wastewater treatment facilities. In particular, the N2O emission rate was affected by several environmental conditions at each facility location, as well as by the management of the wastewater treatment.

关键词： Manure Greenhouse gas Denitrification BOD/NNitrous oxide Methane

Matricellular proteins as possible biomarkers for early brain injury after aneurysmal subarachnoid hemorrhage

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Neural Regeneration Research 2018年第7期13卷 1175-1178页

作者： Hidenori Suzuki hirofumi Nishikawa Fumihiro Kawakita Department of Neurosurgery Mie University Graduate School of Medicine

Aneurysmal subarachnoid hemorrhage remains devastating,and the most important determinant of poor outcome is early brain injury（EBI）.In clinical settings,as a surrogate marker of EBI,loss of consciousness at ictus,poor initial clinical grades,and some radiographic findings are used,but these markers are somewhat ***,it is imperative to find biomarkers of EBI that have beneficial prognostic and therapeutic *** our opinion,an ideal biomarker is a molecule that is implicated in the pathogenesis of both EBI and subsequently developing delayed cerebral ischemia（DCI）,being a therapeutic target,and can be measured easily in the peripheral blood in an acute stage.A good candidate of such a biomarker is a matricellular protein,which is a secreted,inducible and multifunctional extracellular matrix *** are many kinds of matricellular proteins reported,but only tenascin-C,osteopontin,galectin-3 and periostin are reported relevant to EBI and *** biomarkers of EBI may stratify aneurysmal subarachnoid hemorrhage patients into categories of risk to develop DCI,and allow objective monitoring of the response to treatment for EBI and earlier diagnosis of *** review emphasizes that further investigation of matricellular proteins as an avenue for biomarker discovery is warranted.

关键词： biomarker early brain injury galectin-3 matricellular protein osteopontin periostin subarachnoid hemorrhage tenascin-C

Roles and regulations of the ETS transcription factor ELF4/MEF

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Journal of Molecular Cell Biology 2017年第3期9卷 168-177页

作者： Mary Ann Suico Tsuyoshi Shuto hirofumi Kai Department of Molecular Medicine Graduate School of Pharmaceutical Sciences Kumamoto University 5-10e-honmachi Kumamoto 862-0973 Japan

Most E26 transformation-specific （ETS） transcription factors are involved in the pathogenesis and progression of cancer. This is in part due to the roles of ETS transcription factors in basic biological processes such as growth, proliferation, and differentiation, and also because of their regulatory functions that have physiological relevance in tumorigenesis, immunity, and basal cellular homoeostasis. A member of the E74-1ike factor （ELF） subfamily of the ETS transcription factor family--myeloid elf-l-Uke factor （MEF）, designated as ELF4~has been shown to be critically involved in immune response and signalling, osteogenesis, adipo- genesis, cancer, and stem cell quiescence. ELF4 carries out these functions as a transcriptional activator or through interactions with its partner proteins. Mutations in ELF4 cause aberrant interactions and induce downstream processes that may lead to dis- eased cells. Knowing how ELF4 impinges on certain cellular processes and how it is regulated in the cells can lead to a better understanding of the physiological and pathological consequences of modulated ELF4 activity.

关键词： myeloid elf-1-like factor (MEF) ELF4 ETS transcription factors immune regulation cancer transcriptional regulation

Discovery of new hazimycin congeners from Kitasatospora sp.P07101

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Acta Pharmaceutica Sinica B 2015年第6期5卷 564-568页

作者： Nobuhiro Koyama hirofumi Sato Hiroshi Tomoda Graduate School of Pharmaceutical Sciences Kitasato University

In an analytical study of microbial broths,the actinomycete strain Kitasatospora sp.P07101 was found to produce three new congeners,which were designated hazimycins B(1),C(2),and D(3),together with the previously reported hazimycin(renamed hazimycin A(4)).The structures of these hazimycins were examined using various spectroscopic methods including nuclear magnetic resonance(NMR),and the results revealed that 1–3 were analogues of hazimycin with the replacement of one of the two isonitrile groups in 4 by an NH-formyl group in 1,the two isonitrile groups and an amide group by two NH-formyl groups and a nitrile group in 2,and the two isonitrile groups and two amide groups by two NH-formyl groups and two nitrile groups in *** hazimycin A exhibited moderate antimicrobial activities against Gram-positive bacteria and Candida *** results indicated that the presence of two isonitrile groups in the hazimycin structure is essential for antimicrobial activity.

关键词： Hazimycin Isonitrile Nitrile Microbial metabolites Kitasatospora

Governance and Expertise in the Teaching Profession:An Analysis of Contemporary Japanese Educational Reforms

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ECNU Review of Education 2019年第2期2卷 166-177页

作者： hirofumi Hamada University of Tsukuba

Purpose:This article examines the Japanese teaching profession’s position on current school governance reforms in Japan and the difficulties teachers are facing as the reforms ***/Approach/Methods:This article describes how a policy for developing teacher quality standards tends to suppress teacher independence while increasing the heteronomy of the teaching *** article discusses how Japan can meet its goal of ensuring“expertise in the teaching profession”by referring to the relationship between“professionalism”and“publicness”in the theories of occupational ***:Expertise in the teaching profession is based on a mixture of academic and practical *** term“educational professionals”should be interpreted to include both“researchers”and“practitioners.”A sustainable governance mechanism for the Japanese teaching profession should be built on a four-way relationship among researchers,practitioners,citizens,and government ***/Value:This study provides a critical review of a broad-reaching educational policy and proposes a new approach for restructuring the governance of the Japanese teaching profession.

关键词： Autonomy Japanese education reform shared governance teaching profession