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Nucleotide Sequence Variations in a Medicinal Relative of Asparagus, <i>Asparagus cochinchinensis</i>(Lour.) Merrill (Asparagaceae)

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American Journal of Plant Sciences 2011年第6期2卷 765-775页

作者： Tatsuya Fukuda In-Ja Song Takuro Ito Hiroshi Hayakawa Yukio Minamiya akira kanno Hokuto Nakayama Jun Yokoyama 不详

To determine the eVolutionary history of Asparagus cochinchinensis (Asparagaceae), we investigated the geographic pattern of its nucleotide sequence variations in Japan, Taiwan, South Korea and China. We found 21 polymorphic nucleotide sites by sequencing the internal transcribed spacer (ITS) region, which gave rise to a total of 15 haplotypes, labeled A to O. The A-type was found only in inland China (Guizhou and Sichuan), and the other haplotypes in China extended to several lineages;therefore, A. cochinchinensis may have its origin in the interior of China. The I-type has large distribution area and it also experienced a quick expansion in relative recent years. Haplotype differentiation was observed between the eastern and western side of the Central Mountain Ridge in Taiwan. Two lineages were found in Japan, one in the Yaeyama Islands and the other in remaining areas of Japan, implying that A. cochinchinensis independently colonized in Japan at least twice.

关键词： Asparagus cochinchinensis Internal Transcribed Spacer (ITS) Phylogeny Phylogeography

Phylogeography of <i>Asparagus schoberioides</i>Kunth (Asparagaceae) in Japan

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American Journal of Plant Sciences 2011年第6期2卷 781-789页

作者： Tatsuya Fukuda In-Ja Song Hokuto Nakayama Takuro Ito akira kanno Hiroshi Hayakawa Yukio Minamiya Jun Yoko Yama 不详

To describe the phylogeographic structures of Asparagus schoberioides Kunth (Asparagaceae) in Japan, we investigated its nucleotide sequence variations with respect to its geographic distribution pattern. Sequencing of the internal transcribed spacer (ITS) 1 region in 29 samples of A. schoberioides revealed 20 polymorphic nucleotide sites. As a result, the 29 samples of A. schoberioides fell into 15 distinct haplotypes and phylogenetic analyses revealed these haplotypes fell into two major clades, Clade 1 and Clade 2. The haplotypes of Clade 1 were distributed chiefly along the Pacific Ocean side of Japan, while those of Clade 2 occurred mainly along the Japan Sea side. This result suggests that A. schoberioides has migrated via two routes in Japan.

关键词： Asparagus schoberioides Internal Transcribed Spacer (ITS) Phylogeny Phylogeography

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关于缺陷位置的测定

无损检测 1986年第8期 228-231页

作者：神尾昭郑家勋

1.前言射线照相法中有关缺陷位置的测定,早在20年前,本刊即已发表'关于缺陷位置测定的立体照相法'等文章;此后,又通过多种多样的方法加以试验研究,作为结论是:只要明确射线源的高度和移动距离,就可以算出缺陷位置;故而这一方法得到确认... 详细信息

1.前言射线照相法中有关缺陷位置的测定,早在20年前,本刊即已发表'关于缺陷位置测定的立体照相法'等文章;此后,又通过多种多样的方法加以试验研究,作为结论是:只要明确射线源的高度和移动距离,就可以算出缺陷位置;故而这一方法得到确认并建议试用。然而,由于所提方法大多数未作关键性说明,以致对于各种公式的建立,适用限界等均未能十分明确。为此,本文就有关方法中的标线·标点法及所谓规定的方法的要点解释如下.

关键词：缺陷位置移动方向标线标点移动距离射线源立体照相

Case of clear-cell hepatocellular carcinoma that developed in the normal liver of a middle-aged woman

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World Journal of Gastroenterology 2008年第1期14卷 129-131页

作者： Atsushi Takahashi Hironobu Saito Yukiko kanno Kazumichi Abe Junko Yokokawa Atsushi Irisawa akira Kenjo Takuro Saito Mitsukazu Gotoh Hiromasa Ohira Department of Internal Medicine Ⅱ Fukushima Medical University School of Medicine 1 Hikarigaoka Fukushima 960-1295 Japan Department of Surgery Ⅰ Fukushima Medical University School of Medicine 1 Hikarigaoka Fukushima 960-1295 Japan

A 36-year-old woman was admitted to our department for close examination of a liver tumor that was found during a medical checkup. Abdominal US, CT and MRI showed a tumor in segment 7 (S7) of the liver. Although imaging suggested hepatocellular carcinoma, laboratory tests showed no abnormality in liver function, hepatitis virus markers were negative, and tumor markers including protein induced by vitamin K absence or antagonist Ⅱ (PIVKA-Ⅱ), α-fetoprotein (AFP), carbohydrate antigen 19-9 (CA19-9), and carcinoembryonic antigen (CEA) were all within normal ranges. Upon aspiration biopsy of the liver, the histopathological diagnosis was moderately differentiated hepatocellular carcinoma. Therefore, right hepatectomy was performed. Although a part of the tumor was necrotic, about 60% of the viable part showed a clear-cell variant. Consequently, it was diagnosed as clear-cell hepatocellular carcinoma. It was noted that the background liver tissue was normal. This case is worthy of reporting because development of clear-cell hepatocellular carcinoma in the normal liver of a middle-aged woman is rarely seen.

关键词： Clear-cell hepatocellular carcinoma Liver Middle-aged

Weyl points and Dirac lines protected by multiple screw rotations

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Science Bulletin 2017年第11期62卷 788-794页

作者： akira Furusaki Condensed Matter Theory Laboratory RIKEN Wako Saitama 351-0198 Japan

In three-dimensional noncentrosymmetric materials two-fold screw rotation symmetry forces electron＇s energy bands to have Weyl points at which two bands touch. This is illustrated for space groups No. 19 （P212121 ） and No. 198 （P213）, which have three orthogonal screw rotation axes. In the case of space groups No. 61 （Pbca） and No. 205 （Pa-3） that have extra inversion symmetry, Weyl points are promoted to four-fold degenerate line nodes in glide-invariant planes. The three-fold rotation symmetry present in the space groups No. 198 and No. 205 allows Weyl and Dirac points, respectively, to appear along its rotation axes in the Brillouin zone and generates four-fold and six-fold degeneracy at the F point and R point, respectively.

关键词： Weyl points Dirac points Nodal lines Nonsymmorphic symmetry

Estimations of the Maximum Tangential Velocity V_(θm) in the Vortex Core Region and also the Mean Rotational Velocity V_(oi) near the Concave Wall Surface in the Returned Flow Type Cyclone Dust Collector

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Journal of Thermal Science 2010年第6期19卷 553-560页

作者： akira Ogawa T 110-0011. Minowa 2-14-7 Taitou-Ku Tokyo Japan

There are many types of cyclone dust collectors for separating the fine solid and dust particles from gases in the various industries and also in the home used purposes. For estimating the power loss and the collection efficiency, one of the most important factors is the maximum tangential velocity V0m in the vortex core region in the cyclone body. In order to determine V0~ by the simple method, it is useful to apply the mechanical balance of the angular momentum fluxes under the assumption of Ogawa combined vortex model which is composed of the quasi-forced vortex in the vortex core region and also the quasi-free vortex surrounded the vortex core region and also under the assumption of the introduction of equivalent length Heq corresponding to the cone spaces of the cyclone body and the dust bunker. On the other hand, the mean rotational velocity Voi near the concave wall surface is also estimated by the mechanical balance of angular momentum fluxes with the moment of viscous friction force. For confirming the general applications of the obtained equations, the returned flow types cyclones changed the throat diameter D3 are designed. The material of the cyclone is the transparent acrylic resin. Therefore the inner surface of the cyclone body can be regarded as smooth surface. The comparisons of the measured velocities V~ and Voi by a cylindrical Pitot tube are shown in good agreement with those of the proposed equations. The above stated results are described in detail.

关键词： Cyclone Dust Collector Maximum Tangential Velocity Mean Rotational Velocity Angular Momentum Flux Equivalent Length Surface Frictional Force Ogawa Combined Vortex Model Reynolds Number.

Comparison of generalized engine control and MPC based on maximum principle

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Control Theory and Technology 2017年第2期15卷 150-157页

作者： akira OHATA TECHNOVA Inc. The Imperial Hotel Tower 1-1 Uchisaiwai-cho 1 Chiyoda-ku Tokyo 100-0011 Japan

Automotive engine control has been continuously improved due to the strong demands from the society and the market since introducing electronic controls but not always following control theories. Therefore, it is not easy for researchers from academia and even engineers from the automotive industry to grasp the whole aspect of engine control. To encounter the issue, important features of engine control are extracted and generalized from the standpoint of control engineering. Comparisons of the control and model predictive control （MPC） showed an outstanding performance of the control generalized from engine controls and how to apply MPC in the framework.

关键词： Automotive engine history of engine control control design input constraints time delay model predictive control

Control of Collection Efficiency for Axial Flow Cyclone Dust Collectors with Fixed Guide Vanes and with Funnel Shaped Exit Pipes

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Journal of Thermal Science 2006年第3期15卷 240-250页

作者： akira Ogawa Masaru Arakawa T-110-0011 Minowa 2-14-7Taitou-KuTokyoJapan SHINWA RULES Co. Ltd.Sanjo-ShiNiigataJapan

The experimental result of the collection efficiency of the axial flow cyclone with the fixed guide vanes is lower than that with the tangential inlet pipe to the cyclone body due to the weak angular momentum transfer given by flowing through the guide vanes. However, one of the interesting points is the control of the collection efficiency depended on the funnel shaped exit pipes. The collection efficiencies for these funnel shaped exit pipes are depended on the Froude number. Then, in this paper, the experimental results of the pressure drop and also the collection efficiency using the fly-ash particles and also the comparison of the calculated results of the collection efficiency with the experimental results are described i~ detail.

关键词： Axial flow cyclone funnel shaped exit pipe fixed guide vanes pressure drop collection efficiency,Froude number cut-Size

Spin-up and Spin-Down Times of Rotational Air Flow Depended on Mean Air Velocity and Surface Roughness on Inner Surface in Cylindrical Vortex Chamber

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Journal of Thermal Science 2004年第1期13卷 46-55页

作者： akira Ogawa Hiroyuki Murakami Department of Mechanical Eng.College of Eng. Nihon UniversityT-963.TokusadaTamura-machiKooriyama-CityJapanThe Marine Self Defense Forcethe Defense AgencyJapan

The spin-up time TA in the spin-up process and spin-down time TD in the spin-down process of rotational air flow in the cylindrical vortex chamber with three kinds of the artificial surface roughness were investigated. One of the most different characteristics between the smooth and rough surface conditions was the spin-down time TD. Also the transient response of the tangential velocity on the spin-up process was analyzed numerically and this result was compared with the experimental results. The above stated results are reported here in detail.

关键词： vortex chamber spin-up time spin-down time transient response surface roughness.