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Polynomial Normal Form of a Plane Curve with a Given Weight Sequence

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Chinese Quarterly Journal of Mathematics 1995年第4期10卷 53-61页

作者： Mutsuo oka Department of

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关键词：平面曲线多项式加权序列法线式存在定理

Effects of zincate treatment on adhesion of electroless Ni-P coating onto various aluminum alloys

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中国有色金属学会会刊：英文版 2009年第4期19卷 814-818页

作者： Makoto HINo Koji MURAKAMI Yutaka MITo oka Ken MURAoka Teruto KANADANI Industrial Technology Research Institute of okayama Prefecture okayama University of Science

The effects of alloying elements on zincate treatment and adhesion of electroless Ni-P coating onto various aluminum alloy substrates were *** morphology of zinc deposits in the 1st zincate treatment and its adhesion were changed depending on the alloying *** zinc deposits in the 2nd zincate treatment became thinly uniform,and the adhesion between aluminum alloy substrate and Ni-P coating was improved irrespective of the alloying *** analysis revealed the existence of zinc on the surface of each aluminum alloy substrate after the pickling in 5% nitric *** zinc on the surface should be an important factor influencing the morphology of zinc deposit at the 2nd zincate treatment and its adhesion.

关键词：化学镀镍锌酸盐铝合金治疗合金涂层粘连合金元素表面形貌

Primary malignant pericardial mesothelioma with difficult antemortem diagnosis:A case report

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World Journal of Clinical Cases 2022年第33期10卷 12380-12387页

作者： Naoya oka Yuichi orita Chikage oshita Hirofumi Nakayama Hiroki Teragawa Department of Clinical Immunology and Rheumatology Hiroshima University HospitalHiroshima 734-8551Japan Department of Cardiovascular Medicine JR Hiroshima HospitalHiroshima 732-0057Japan Department of Pathology JR Hiroshima HospitalHiroshima 732-0057Japan

BACKGRoUND Primary malignant pericardial mesothelioma(PMPM)is an extremely rare malignant tumor,and it is difficult to diagnose definitively before *** present a case in which PMPM was diagnosed at *** consider this case to be highly suggestive and report it *** SUMMARY A 78-year-old male presented with transient loss of consciousness and *** transient loss of consciousness was considered to result from complications of diastolic dysfunction due to pericardial disease,fever with dehydration,and paroxysmal atrial *** cardiography(UCG)and computed tomography showed cardiac enlargement and high-density pericardial *** considered pericardial disease to be the main pathogenesis of this *** magnetic resonance imaging and gadolinium contrast-enhanced T1-weighted images showed thick staining inside and outside the *** biopsy was considered to establish a definitive diagnosis,but the patient and his family refused further treatment and examinations,and the patient was followed *** noticed a thickening of the pericardium and massive changes in the pericardium on UCG over *** performed an autopsy 60 h after the patient died of *** staining of the autopsy tissue showed an epithelial-like arrangement in the pericardial tumor,and immunostaining showed positive and negative factors for the diagnosis of *** on these findings,the final diagnosis of PMPM was *** PMPM has a poor prognosis,and early diagnosis and treatment are *** temporal echocardiographic findings may provide a clue for the diagnosis of PMPM.

关键词： Primary malignant pericardial mesothelioma Antemortem diagnosis Pericardial disease Temporal echocardiographic Case report

Pre-Failure Behavior of Deep-Situated osaka Clay

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China ocean Engineering 1998年第4期13卷 453-465页

作者： T.HoNGo M.FUKUDA T.ADACHI F.oka Vice DirectorProfessorSchool of GraduatesKyoto UniversitySakyo-ku HonmachiKyotoJapanAcademician of Chinese Academy of EngineeringGeotechnical Engineering DepartmentNanjing Hydraulic Research Institute.Nanjing 210024P.RChina DirectorOsaka Soil Test LabItachibori 4-3-2Nishi-kuOsakaJapan.of Depart.Osaka Soil Test LabItachibori 4-3-2Nishi-kuOsakaJapan

Great interest has been aroused on deeply-situated osaka clay since Kobe Earthquake in 1994. In this paper is presented the analysis on the results of a series of lab tests on osaka clay situated from 100 m to 1500 m under the ground. The wave velocity method, bender element method, LDT and the formula derived by the authors are used, focus is put on the pre-failure mechanical behavior of the clay. The analysis shows that, (i) pore-pressure coefficient B is less than 1.0, (ii) the relationship between shear modulus and Poisson's ratio is not in agreement with that reported before, (iii) the modulus measured with LDT is still less than that measured with bender element method, and (iv) there are two threshold strains, within which the clay can be considered as elastic, and both of them are larger than that reported before.

关键词： pre-failure behavior natural clays wave velocity method bender element LDT

Structural phase transition, antiferromagnetism and two superconducting domes in LaFeAso_(1-x)F_x(0

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Science China(Physics,Mechanics & Astronomy) 2018年第11期61卷 72-83页

作者： Jie Yang Toshihide oka Zheng Li HuaiXin Yang JianQi Li GenFu Chen Guo-Qing Zheng Institute of Physics Chinese Academy of Sciences and Beijing National Laboratory for Condensed Matter Physics Department of Physics Okayama University

We report^(75) As nuclear magnetic resonance(NMR)/nuclear quadrupole resonance(NQR) and transmission electron microscopy(TEM) studies on LaFeAso_(1-x)F_x. There are two superconducting domes in this material. The first one appears at 0.03 ≤ x ≤0.2 with T_c^(max) = 27 K, and the second one at 0.25 ≤x≤0.75 with T_c^(max) = 30 K. By NMR and TEM, we demonstrate that a C4-to-C2 structural phase transition(SPT) takes place above both domes, with the transition temperature T_s varying strongly with x. In the first dome, the SPT is followed by an antiferromagnetic(AF) transition, but neither AF order nor low-energy spin fluctuations are found in the second dome. By ^(75) As nuclear spin-lattice relaxation rate(1/T_1) measurements, we find that AF order and superconductivity coexist microscopically in LaFeAso_(0.97) F_(0.03). In the coexisting region, 1/T_1 decreases at T_c but becomes proportional to T below 0.6 T_c, indicating gapless excitations. Therefore, in contrast to the early reports, the obtained phase diagram for x ≤ 0.2 is quite similar to the doped BaFe_2As_2 system. The electrical resistivity p in the second dome can be fitted by ρ = ρ0 + AT^n with n = 1 and a maximal coefficient A at around xopt = 0.5-0.55 at which T_s extrapolates to zero and Tc is the maximal, which suggests the importance of quantum critical fluctuations associated with the SPT. We have constructed a complete phase diagram of LaFeAso_(1-x)F_x, which provides insight into the relationship between SPT, antiferromagnetism and superconductivity.

关键词： nuclear magnetic resonance antiferromagnetism superconductivity structural phase transition

High Power Neutral Beam Injection in LHD

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Plasma Science and Technology 2006年第1期8卷 24-27页

作者： K.TSUMoRI Y.TAKEIRI K.NAGAoka K.IKEDA M.oSAKABE Y.oka.o.KANEKo M.SHIBUYA T.KoNDo M.SATo E.ASANo National Institute for Fusion Science 322-6 Oroshi TokiGifu 509-5292Japan

The results on high power injection with the ueutral bean, injection （NBI） system for the Large Helical Device （LHD） are reported. The system consists of three beam-lines with two hydrogen negative ion （H^- ion） sources installed in each beam-line. In order to improve the injection power, a new beam accelerator with a multi-slot grounded grid （MSGG） has been developed and applied to one beam-line. Using the accelerator, a maximum power of 5.7 MW was achieved in 2003 and 2004, and the maximum energy of 189 keV was reached. The power and energy exceeded the design values of the individual beam-line for LHD. The other beam-lines also increased their injection power up to about 4 MW, and the total injection power of 13.1 MW was achieved with three beam-llnes in 2003. Although the accelerator had an advantage in high power beam injection, extracted beams expand in the short side direction of the ground-grid slot. The disadvantage has been resolved by modifying the aperture shapes of the steering grid.

关键词： NBI negative ion source

Clinical study using novel endoscopic system for measuring size of gastrointestinal lesion

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World Journal of Gastroenterology 2014年第14期20卷 4050-4058页

作者： Kiyoshi oka Takeshi Seki Tomohiro Akatsu Takao Wakabayashi Kazuo Inui Junji Yoshino oK Fiber Technology Co. Ltd. Graduate School of engineering and Resource Science Akita University A-tech Co. Ltd. Department of Internal Medicine Banbuntane Hotokukai HospitalFujita Health University

AIM: To verify the performance of a lesion size measurement system through a clinical study.

关键词： Lesion size Non-contact measurement Endoscope Grid scale Low level laser

Current Developments in the Stable Production of Human Induced Pluripotent Stem Cells

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Engineering 2021年第2期7卷 144-152页

作者： Ikki Horiguchi Masahiro Kino-oka Department of Biotechnology Graduate School of EngineeringOsaka UniversityOsaka 565-0871Japan

Induced pluripotent stem cells(iPSCs)are considered to be ideal and promising cell sources for various applications such as regenerative medicine and drug ***,effective mass production systems for the stable supply of desired numbers of iPSCs are yet to be *** review introduces the various approaches that are currently available for stable iPSC *** start by discussing the limiting factors to be controlled during iPSC culture,such as nutrient supply,waste removal,and oxygen *** then introduce recent investigations on iPSC culture systems based on adhesion,suspension,and *** also discuss the downstream processes that follow the culture process,such as filling and freezing processes,which limit the production scale due to decreased cell viability during suspension in cryopreservation ***,we summarize the possibility of the stable mass production of iPSCs and highlight the limitations that remain to be *** suggest that multidisciplinary investigations are essential to understand the different factors that influence cell growth and quality in order to obtain an optimal and stable iPSC mass production system.

关键词： Induced pluripotent stem cell Cell manufacturing Expansion Filling Freezing

Clinical significance of type V_I pit pattern subclassification in determining the depth of invasion of colorectal neoplasms

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World Journal of Gastroenterology 2008年第2期14卷 211-217页

作者： Hiroyuki Kanao Shinji Tanaka Shiro oka Iwao Kaneko Shigeto Yoshida Koji Arihiro Masaharu Yoshihara Kazuaki Chayama Department of Medicine and Molecular Science Hiroshima University Graduate School of Biomedical Science Hiroshima Japan Department of Endoscopy Hiroshima University Hospital Hiroshima Japan Department of Pathology Hiroshima University Hospital Hiroshima Japan Health Service Center Hiroshima University Hiroshima Japan

AIM: To clarify whether subclassification of the type VI pit pattern on the basis of magnifying colonoscopy findings is useful in determining the type and depth of invasion of colorectal ***: We retrospectively analyzed 272 colorectal neoplasms (117 dysplasias and 155 submucosal invasive carcinomas; 228 patients) with a type V pit pattern [type VI, n = 202; type VN, n = 70 (Kudo and Tsuruta classification system)]. We divided lesions with a type VI pit pattern into two subclasses, mildly irregular lesions and severely irregular lesions, according to the prominent and detailed magnifying colonoscopy findings. We examined the relation between these two subclasses and histology/invasion ***: one hundred and four lesions (51.5%) were judged to be mildly irregular, and 98 lesions (48.5%) were judged to be severely irregular. Ninety-seven (93.3%) mildly irregular lesions showed dysplasias or submucosal invasion of less than 1000 μm (SM ons showed submucosal invasion equal to or deeper than 1000 μm (SM ≥ 1000 μm). Mild irregularity was found significantly more often in dysplasias or lesions with SM ons with SM ≥ 1000 μm (P oNCLUSIoN: Subclassification of the type VI pit pattern is useful for identifying dysplasias or lesions with SM < 1000 μm.

关键词： Colorectal neoplasm Magnification Type VI pit pattern Depth of invasion