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International Journal of Minerals,Metallurgy and Materials 1998年第3期12卷 134-139页

作者： k ogura W Lou M Nakayama T Fukume(Department of Applied Chemistry, Yamaguchi University, Ube 755, Japan Department of Applied Chemistry Yamaguchi University Ube 755 Japan

Potential oscillations of a stainless steel electrode galvanostatically anodized have been observed in amixture of chromic and sulfuric acids. The potential regularly oscillated between 1.6 V vs. SCE (lower) and 2.1V(upper) with a certain frequency. The potential values are affected neither by the composition of chromic and sulfu-ric acids nor by the magnitude of applied current density although the potential frequency is very sensitive to theseparameters. This phenomenon is interpreted in terms of the repeated formation and disappearance of the saturatedlayer of dichromate ions on the electrode surface. Such scheme is consistent with the in situ FTIR spectroscopicresult that the concentration of Cr2O ions on the electrode surface increased with time during the polarization atthe lower potential but the change in concenetion of Cr2O ions was negligible at the higher potential.

关键词： stainless steel electrode potential galvanostatic polarization

High-Frequency Flyback Transformer Linked Utility-Connected Sinewave Soft-switching Power Conditioner using A Switched Capacitor Snubber

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High-Frequency Flyback Transformer Linked Utility-Connected ...

Metrology for sub-Rayleigh-length target positioning in~10^(22)W/cm^(2)laser-plasma experiments

第4届国际电力电子及运动控制国际会议

作者： S.Chandhaket k.ogura M.Nakaoka（Prof.Dr-Eng） Y.konishi Department of Electrical Engineering Yamaguchi UniversityUbeYamaguchiJapan Department of Electrical Engineering Yamaguchi UniversityUbeYamaguchiJapan Department of Electrical Engineering Yamaguchi UniversityUbeYamaguchiJapan Fuji Electric Systems Co. LtdKobeHyogoJapan

＜正＞ In this paper, the high-frequency switching pulse modulation utility-interfaced power conditioner with a flyback high-frequency transformer link has been proposed. With the aid of the switched-capacitor resonant snubber cell, the high-frequency switching devices in the primary side of the proposed DC-to-AC power inverter can be turned-off with zero voltage soft-switching （ZVS）. Moreover, the proposed power conditioner operates the currents in the discontinuous conduction mode （DCM） and takes the advantages of zero current softswitching turn-on. Its output port is connected directly to the utility grid AC power source. At the end, the prototype of the proposed HF-UPC is built and tested in the experiments. Its power conversion processing is verified and the output current is qualified in accordance with the guidelines of the power systems.

关键词： Utility-connected sinewave power inverter High-frequency flyback transformer Switched capacitor snubber circuit Diacontinuous conduction mode Zero voltage/current soft-switching commutation

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High Power Laser Science and Engineering 2024年第3期12卷 90-105页

作者： E.A.Vishnyakov A.Sagisaka k.ogura T.Zh.Esirkepov B.Gonzalez-Izquierdo C.D.Armstrong T.A.Pikuz S.A.Pikuz W.Yan T.M.Jeong S.Singh P.Hadjisolomou O.Finke G.M.Grittani M.Nevrkla C.M.Lazzarini A.Velyhan T.Hayakawa Y.Fukuda J.k.koga M.Ishino k.kondo Y.Miyasaka A.kon M.Nishikino Y.V.Nosach D.khikhlukha I.P.Tsygvintsev D.kumar J.Nejdl D.Margarone P.V.Sasorov S.Weber M.kando H.kiriyama Y.kato G.korn k.kondo S.V.Bulanov T.kawachi A.S.Pirozhkov ELI Beamlines Facility The Extreme Light Infrastructure ERICDolníBrežanyCzech Republic kansai Institute for Photon Science(kPSI) QSTKyotoJapan Central Laser Facility Rutherford Appleton LaboratorySTFCHarwell OxfordDidcotUK Institute for Open and Transdisciplinary Research Initiatives Osaka UniversityOsakaJapan HB11 Energy Holdings FreshwaterAustralia key Laboratory for Laser Plasmas(Ministry of Education) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghaiChina Institute of Plasma Physics ASCR PragueCzech Republic FZU-Institute of Physics ASCR PragueCzech Republic Czech Technical University in Prague FNSPEPragueCzech Republic Institute of Laser Engineering Osaka UniversityOsakaJapan Institute of Physics National Academy of Sciences of UkraineKyivUkraine ISTEQ AR YerevanArmenia

Tight focusing with very small f-numbers is necessary to achieve the highest at-focus ***,tight focusing imposes strong demands on precise target positioning in-focus to achieve the highest on-target irradiance We describe several near-infrared,visible,ultraviolet and soft and hard X-ray diagnostics employed in a~10^(22)W/cm^(2)laser±plasma *** used nearly 10 J total energy femtosecond laser pulses focused into an approximately1.3-μm focal spot on 5±20μm thick stainless-steel *** discuss the applicability of these diagnostics to determine the best in-focus target position with approximately 5μm accuracy(i.e.,around half of the short Rayleigh length)and show that several diagnostics(in particular,3ωreflection and on-axis hard X-rays)can ensure this *** demonstrated target positioning within several micrometers from the focus,ensuring over 80%of the ideal peak laser intensity *** approach is relatively fast(it requires 10±20 laser shots)and does not rely on the coincidence of low-power and high-power focal planes.

关键词： laser-plasma interaction precise target positioning spectroscopy ultra-high intensity X-rays

Siltation and radiocesium pollution of small lakes in different catchment types far from the Fukushima Daiichi nuclear power plant accident site

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International Soil and Water Conservation Research 2020年第1期8卷 56-65页

作者： Mikhail komissarov Shin-ichiro ogura Ufa Institute of Biology Russian Academy of SciencesPr.Oktyabrya 69Ufa450054Russia Graduate School of Agricultural Science Tohoku University232-3 YomogitaNaruko-onsenOsaki989-6711Japan

The Fukushima Daiichi nuclear power plant accident caused radioactive pollution in northeastern Honshu Island,*** study examined the influence of snowmelt and rainfall on soil erosion pro-cesses and siltation of small lakes in Miyagi Prefecture(150 km northwest of the power plant).Two sets of slopes and lakes,respectively in pasture and forest catchments,were *** thickness,soil infiltration,surface runoff volume,soil and sediment physicochemical properties,Cs concentration of precipitation,meltwater,and rainwater,and lake siltation rates were *** total radioactive Cs content in precipitation was 0.7-7.4 Bq·L^-1 and was below the Japanese standard(10 Bq·L^-1).Total radioactive Cs was at the allowable level in water flowing down the pasture catchment slope(0.1-9.2 Bq·L^-1)during snowmelt and rainfall,as well as in pasture(0.9-8.8 Bq·L^-1)and forest(0.7-5.2 Bq·L^-1)catchment lake *** was no soil erosion(surface runoff)in the forest *** losses in the pasture catchment were 23 due to rainfall and 9 kg ha^-1 yr^-1 following spring *** snow-melt,a 0.5 and 0.2 mm thick layer of silt was deposited in pasture and forest catchment lakes,respec-tively,and 1.4 and 0.6 mm were deposited during the rainfall *** siltation rates were 1.9 and 0.8 mm·yr^-1 for pasture and forest catchment lakes,*** upper layer of lake bottom sedi-ments is represented mainly by silt fractions(2-50μm),with high organic matter(4.0-5.7%)and radiocesium(1100-1600 kg·ha^-1)contents.

关键词： Fukushima Daiichi Radiocesium Siltation Suspended sediment Waterbodies Water turbidity

Strong Solution of It Type Set-Valued Stochastic Differential Equation

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Acta Mathematica Sinica,English Series 2010年第9期26卷 1739-1748页

作者： Jun Gang LI Yukio ogura Department of Mathematics Beijing Jiaotong University Beijing 100044 P. R. China Department of Applied Mathematics Beijing University of Technology Beijing 100124 P. R. China Department of Mathematics Saga University Saga 840-8502 Japan

In this paper, we shall firstly illustrate why we should introduce an It5 type set-valued stochastic differential equation and why we should notice the almost everywhere problem. Secondly we shall give a clear definition of Aumann type Lebesgue integral and prove the measurability of the Lebesgue integral of set-valued stochastic processes with respect to time t. Then we shall present some new properties, especially prove an important inequality of set-valued Lebesgue integrals. Finally we shall prove the existence and the uniqueness of a strong solution to the It5 type set-valued stochastic differential equation.

关键词： Set-valued stochastic process set-valued Lebesgue integral set-valued stochastic differential equation strong solution

Genomics and effective trait candidates of edible insects

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Food Bioscience 2022年第4期48卷 34-42页

作者： Yuichi Nakajima Atsushi ogura Department of Bioscience Nagahama Institute of Bio-Science and Technology1266 Tamura-choNagahamaShiga 526-0829Japan Center for Climate Change Adaptation National Institute for Environmental Studies16-2 OnogawaTsukubaIbaraki 305-8506Japan.

The farming of insects for food has many advantages,since insects are readily available,can be grown in small areas,are efficient at the conversion of food to biomass,and have a minimal contribution to environmental *** review the prospects for farming insects using data obtained from next-generation genome-wide DNA sequencing to guide the selection of desirable *** approach is more efficient than traditional breeding processes and promises to facilitate the development of insect strains with phenotypes which make them desirable as food *** also review some of the potential problems associated with the mass production of insects and suggest some factors which must be taken into consideration as inbreeding depression,adaptability,and *** are a cheap,easily available source of nutrients such as proteins and fats,and the efficient mass production of insect-based foods may help to ameliorate problems of the food supply.

关键词： Adaptation Breeding environment Food crisis Genes Phenotypes

Technical tips of endoscopic ultrasound-guided choledochoduodenostomy

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World Journal of Gastroenterology 2015年第3期21卷 820-828页

作者： Takeshi ogura kazuhide Higuchi Second Department of Internal Medicine Osaka Medical CollegeOsaka 569-8686Japan

Endoscopic ultrasound(EUS) is clinically useful not only as a diagnostic tool during EUS-guided fine needle aspiration,but also during interventional ***-guided biliary drainage has been developed and performed by experienced ***-guided choledocoduodenostomy(EUS-CDS) is relatively well established as an alternative biliary drainage method for biliary decompression in patients with biliary *** reported technical success rate of EUS-CDS ranges from 50% to 100%,and the clinical success rate ranges from 92% to 100%.Further,the over-all technicalsuccess rate was 93%,and clinical success rate was 98%.Based on the currently available literature,the overall adverse event rate for EUS-CDS is 16%.The data on the cumulative technical and clinical success rate for EUS-CDS is ***,EUS-CDS can still lead to several problems,so techniques or devices that are more feasible and safe need to be ***-CDS has the potential to become a first-line biliary drainage procedure,although standardizing the technique in multicenter clinical trials and comparisons with endoscopic biliary drainage by randomized clinical trials are still needed.

关键词： Endoscopic ultrasound Endoscopic ultrasoundguided

Technical tips for endoscopic ultrasound-guided hepaticogastrostomy

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World Journal of Gastroenterology 2016年第15期22卷 3945-3951页

作者： Takeshi ogura kazuhide Higuchi Second Department of Internal Medicine Osaka Medical College

Interventional procedures using endoscopic ultrasound(EUS) have recently been developed. For biliary drainage, EUS-guided trans-luminal drainage has been reported. In this procedure, the transduodenal approach for extrahepatic bile ducts is called EUSguided choledochoduodenostomy, and the transgastric approach for intrahepatic bile ducts is called EUSguided hepaticogastrostomy(EUS-HGS). These procedures have several effects, such as internal drainage and avoiding post-endoscopic retrograde cholangiopancreatography(ERCP) pancreatitis, and they are indicated for an inaccessible ampulla of Vater due to duodenal obstruction or surgical anatomy. EUS-HGS has particularly wide indications and clinical impact as an alternative biliary drainage method. In this procedure, it is necessary to dilate the fistula, and several devices and approaches have been reported. Stent selection is also important. In previous reports, the overall technical success rate was 82%(221/270), the clinical success rate was 97%(218/225), and the overall adverse event rate for EUS-HGS was 23%(62/270). Adverse events of EUS-biliary drainage are still high compared with ERCP or PTCD. EUSHGS should continue to be performed by experienced endoscopists who can use various strategies when adverse events occur.

关键词： Endoscopic ultrasound Endoscopic ultrasound-guided hepaticogastrostomy Endoscopic ultrasound-guided biliary drainage Endoscopic retrograde cholangiopancreatography

Does endoscopic ultrasound-guided biliary drainage really have clinical impact?

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World Journal of Gastroenterology 2015年第4期21卷 1049-1052页

作者： Takeshi ogura kazuhide Higuchi Second Department of Internal Medicine Osaka Medical CollegeOsaka 569-8686Japan

The well established, gold standard method for treatment of obstructive jaundice involves biliary drainage under endoscopic retrograde cholangiopancreatography(ERCP) performed by pancreatobiliary endoscopists. Recently, interventions using endoscopic ultrasound(EUS) have been developed not only for obtaining cytological and histological diagnosis, but also for biliary drainage as alternative method. EUS-guided biliary drainage(EUSBD) was first reported by Giovannini et al. EUS-BD broadly includes EUS-guided rendezvous technique, EUS-guided choledochoduodenostomy, and EUS-guided hepaticogastrostomy. More recently, EUS-guided antegrade stenting and EUS-guided gallbladder drainage have also been reported. many case reports, series, and retrospective studies on EUS-BD have been reported. However, because prospective studies and comparisons between the different biliary drainage methods have not been reported, the technical success, functional success, adverse events, and stent patency with long-term follow up of EUS-BD are still unclear. Therefore, prospective, randomized controlled studies addressing these issues are needed. Despite this, EUSBD undoubtedly is clinically useful as an alternative biliary drainage method. EUS-BD has the potential to be a first-line biliary drainage method instead of ERCP if results of clinical trials are favorable and the technique is simplified.

关键词： Endoscopic ultrasound Endoscopic ultrasoundguided

Stimulatory effect on the transport mediated by organic anion transporting polypeptide 2B1

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Asian Journal of Pharmaceutical Sciences 2020年第2期15卷 181-191页

作者： Jiro ogura Hiroaki Yamaguchi Nariyasu Mano Tohoku University Hospital Department of Pharmaceutical SciencesMiyagi 980-8574Japan

Drug-drug interaction(DDI)is one of causes of adverse drug events and can result in lifethreatening *** anion-transporting polypeptide(OATP)2B1 is a major uptake transporter in the intestine and contributes to transport various clinically used therapeutic *** intestine has a high risk of DDI,because it has a special propensity to be exposed to a high concentration of ***,understanding drug interaction mediated by OATP2B1 in the absorption process is important for the prevention of adverse drug events,including decrease in the therapeutic effect of co-administered *** drug interaction occurs through the direct inhibitory effect on transporters,including ***,some compounds such as clinically used drugs and food components have an acute stimulatory effect on transport of co-administered drugs by *** review summarizes the acute stimulatory effect on the transport mediated by OATP2B1 and discusses the mechanisms of the acute stimulatory effects of *** are two types of acute stimulatory effects,substrate-independent and-dependent interactions on OATP2B1 *** facilitating translocation of OATP2B1 to the plasma membrane is one of causes for the substrate-independent acute stimulatory *** the contrary,the substrate-dependent effect is based on the direct binding to the substrate-binding site or allosteric progesterone-binding site of OATP2B1.

关键词： OATP2B1 Drug interaction Stimulatory effect Membrane translocation Conformational change