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High Pressure Synthesis at the Origin of New Developments in Silicon Clathrate Physical-Chemistry

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High Pressure Synthesis at the Origin of New Developments in...

Electrical Conductivity Measurment and Thermal Conductivity Analysis on(Sr,Ba)MoO3 and(Sr,Ba)MoO4

18th International Conference on High Pressure Science and Technology

作者： E.Reny S.yamanaka C.Cros M.Pouchard Department of Applied Chemistry Faculty of EngineeringHiroshima UniversityHigashi Hiroshima 739-8527Japan Japan Society for the Promotion of Science (JSPS Japan Department of Applied Chemistry Faculty of EngineeringHiroshima UniversityHigashi Hiroshima 739-8527 CRESTJapan Science and Technology Corporation (JSTJapan Institut de Chimie de la Matiere Condensee de Bordeaux 33608 Pessac cedexFrance Institut de Chimie de la Matiere Condensee de Bordeaux 33608 Pessac cedexFrance

＜正＞The network of type I silicon clathrate structures is an arrangement of fullerene-like Si20（Ih） and Si24（D6d） polyhedra connected via their pentagonal and hexagonal faces. These compounds crystallise in a cubic cell （Pm3n） where the two Si20 dodecahedra occupy the summits and the centre of the cube while six Si24 tetradekaidecahedra are situated on the faces. In the centre of these cages can be found guest atoms which are usually alkali or alkaline-earth elements （M）.（1,2）The corresponding ideal formula is therefore M8Si46. A representation of the ideal structure can be seen in figure 1. Up to recently, silicon clathrates could only be synthesised by two means: melting of stoichiometric mixture of the elements or thermal degradation of alkali or alkaline earth silicides under vacuum or argon flow. However, some compositions couldn’t be obtained in either ways. Recently, we attempted with great success the synthesis of clathrates using a High Pressure High Temperature （HPHT） technique. For example, two years ago, was successfully obtained for the first time, Ba8Si46 exhibiting superconducting properties with a Tc = 8K, highest ever obtained for sp3 silicon networks.（3） The increasing interest of the scientific community for clathrates, resulting mainly from the observed or speculated physical properties of such materials （superconductivity（3）, peculiar mechanical properties（4）, possible thermoelectric applications due to the guest atom rattling（5） etc.）, led us to explore the high pressure high temperature synthesis routein order to attempt the synthesis of other new silicon clathrates. We report in this presentation synthesis by HPHT of the first silicon clathrate compound doped with an electronegative element（6） Actually during the synthesis, the clathrate phase formation is in concurrence with other compounds as silicon iodides of type Silx. However it is possible to ’help’ the reaction by the addition of a crystalline seed to the starting

关键词： High Pressure High Temperature Synthesis Silicon Clathrate Iodine.

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Electrical Conductivity Measurment and Thermal Conductivity ...

A NEW CHANNEL ASSIGNMENT METHOD FOR DEMAND ASSIGNMENT MULTICARRIER TDMA SATELLITE COMMUNICATION SYSTEMS

作者： S.yamanaka M.Uno K.Kurosaki H.Muta Division of Sustainable Energy and Environmental Engineering Graduate School of EngineeringOsaka University Research Institute of Nuclear Engineering University of Fukui

INTRODUCTION:The behavior of fission products and the properties of their compounds are very important for evaluation of the fuel *** gray oxide phase of(Sr,Ba)-(U,Pu,Zr,RE,Mo)-O compounds have been observed as the oxide *** our previous study,we performed thermal conductivity characterizations on the(Sr,Ba)-Mo-O ternary compounds and revealed that the thermal conductivities of(Sr,Ba)MoO are approximately 10 times higher than those of

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A NEW CHANNEL ASSIGNMENT METHOD FOR DEMAND ASSIGNMENT MULTIC...

大火热辐射对日本铁道车辆用材料燃烧性能影响的定量研究

International Conference on Communication Technology(ICCT’94)

作者： Nobuhisa Kataoka Makoto Miyake Tadashi Fujino Osamu yamanaka Keiji Okumura Junko Maruhashi Commun.Sys.Lab. Mitsubishi Electric Corp.Ofuna 5-1-1Kamakura-shi247 Japan Commun.Equip.Works Mitsubishi Electric Corp.Tsukaguchi-Honmachi 8-1-1Amagasaki-shi661 Japan

＜正＞A new practical method for channel assignment is proposed for demand assignment multicarrier TDMA satellite communication *** method enables us to markedly reduce the effect of "burst overlapping" without introducing the channel reassignment processing,and provides an excellent performance of blocking probability.

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国外铁道车辆 2020年第4期57卷 24-29页

作者： [日]Sho yamanaka 周方涵(译) 刘宏友(校) 不详

利用锥形量热仪对日本铁道车辆用材料进行了防火试验,对铁道车辆用材料的防火性能进行了分类,并与日本用酒精灯法进行防火试验的结果进行了粗略对比。

关键词：燃烧性能阻燃防火试验日本

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日本后勤支援飞行器与国际空间站的交会策略

控制工程（北京） 1998年第1期 47-52页

作者： K.yamanaka 曹锡生

日本宇宙事业开发团(NASDA)正在研制一个为国际空间站提供后勤支援的自动转移飞行器。该飞行器叫作H-Ⅱ转移飞行器(HTV),将用日本H-Ⅱ火箭的改进型H-ⅡA火箭发射。HTV与H-ⅡA火箭分离后,完成长距离的交会过程,包括相位、高度和平面调整... 详细信息

日本宇宙事业开发团(NASDA)正在研制一个为国际空间站提供后勤支援的自动转移飞行器。该飞行器叫作H-Ⅱ转移飞行器(HTV),将用日本H-Ⅱ火箭的改进型H-ⅡA火箭发射。HTV与H-ⅡA火箭分离后,完成长距离的交会过程,包括相位、高度和平面调整机动。现正在为HTV设计包括两个椭圆形中间轨道的长距离交会过程。长距离交会利用GPS导航。在空间站附近,将为最后接近空间站而建立差分GPS导航。HTV从下方接近空间站(即距离矢量接近)。从500m起将用激光雷达导航系统。在停泊港,HTV将由空间站的机械臂捕捉。HTV在接近操作方面的导航、制导和控制功能,将通过1997年发射的工程试验卫星Ⅶ(ETS-Ⅶ)的交会对接试验项目在轨道上进行演示。

关键词：国际空间站日本空间飞行器交会策略

Echo-guided pin-point compression can effectively repair pseudoaneurysms associated with catheter procedure

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World Journal of Cardiovascular Diseases 2012年第3期2卷 155-160页

作者： Toshiaki yamanaka Yoichi Nakamura Yusuke Kawai Sumiko Sato Kazuaki Mineoi Tadakatsu Yamada Hideki Okayama Yukio Kazatani Hiroshi Ito Department of Cardiovascular Medicine Ehime Prefectural Central Hospital Matsuyama Japan Department of Cardiovascular Medicine Graduate School of Medicine Dentistry and Pharmaceutical Sciences Okayama University Okayama Japan SOYOKAZE Cardiovascular Medicine and Diabetes Care Matsuyama Japan

Background: Catheter intervention is occasionally complicated by a pseudoaneurysm at the puncture site. Although the feasibility of echo-guided repair of a pseudoaneurysm has been reported, this method does not always repair the pseudoaneurysm. We hypothesized that if the communication to the artery could be effectively closed by pin-point compression, the clot that forms in the residual lumen would effectively cover the communication. We studied the safety and efficacy of the echo-guided pinpoint compression procedure for repairing a pseudoaneurysm. Methods: Ten consecutive patients with a pseudoaneurysm were enrolled. We determined the site of communication by echography with a high-frequency linear probe. We performed pin-point compression on the communication point with the right index finger, and we confirmed closure of the communication by color Doppler. During compression, we monitored echo images to confirm clot formation. Results: A pseudoaneurysm was located on the femoral artery in 6 patients and on the brachial artery in 4 patients. The sizes of the pseudoaneurysms ranged from 13 to 40 mm in diameter. We successfully closed the communication with one-finger compression in all patients. During the compression, we observed clot formation in the residual lumen of the pseudoaneurysm in all patients by echography. The duration of compression ranged from 5 to 40 minutes (mean, 18 minutes). We succeeded in repairing the pseudoaneurysm in all patients using this method. The success of the procedure was also confirmed 24 hours later in all patients. Conclusions: Echo-guided pin-point compression of the communication might be an effective technique for repairing a pseudoaneurysm at the puncture site, and echography is useful for confirming the success of the procedure.

关键词： Pseudoaneurysm Treatment Ultrasound

Hemorrhagic gastric and duodenal ulcers after the Great East Japan Earthquake Disaster

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World Journal of Gastroenterology 2013年第42期19卷 7426-7432页

作者： Kenichi yamanaka Hiroyuki Miyatani Yukio Yoshida Shinichi Asabe Toru Yoshida Misaki Nakano Shin Obara Hidehiko Endo Department of Gastroenterology Iwate Prefectural Kamaishi HospitalKamaishi 026-8550Japan Department of Gastroenterology Jichi Medical UniversitySaitama Medical CenterSaitama 330-8503Japan Department of Surgery Iwate Prefectural Kamaishi HospitalKamaishi 026-8550Japan

AIM:To elucidate the characteristics of hemorrhagic gastric/duodenal ulcers in a post-earthquake period within one medical ***:Hemorrhagic gastric/duodenal ulcers in the Iwate Prefectural Kamaishi Hospital during the 6-mo period after the Great East Japan Earthquake Disaster were reviewed *** subjects were 27patients who visited our hospital with a chief complaint of hematemesis or hemorrhagic stool and were diagnosed as having hemorrhagic gastric/duodenal ulcers by upper gastrointestinal endoscopy during a 6-mo period starting on March 11,*** period was divided into two phases:the acute stress phase,comprising the first month after the earthquake disaster,and the chronic stress phase,from the second through the sixth *** following items were analyzed according to these phases:age,sex,sites and number of ulcers,peptic ulcer history,status of Helicobacter pylori(***)infection,intake of non-steroidal anti-inflammatory drugs,and degree of impact of the earthquake ***:In the acute stress phase from 10 d to 1mo after the disaster,the number of patients increased rapidly,with a nearly equal male-to-female ratio,and the rate of multiple ulcers was significantly higher than in the previous year(88.9%vs 25%,P<0.005).In the chronic stress phase starting 1 mo after the earthquake disaster,the number of patients decreased to a level similar to that of the previous *** were more male patients during this period,and many patients tended to have a solitary *** patients with duodenal ulcers found in the acute stress phase were negative for serum *** antibodies,and this was significantly different from the previous year’s positive rate of 75%(P<0.05).CONCLUSION:Severe stress caused by an earthquake disaster may have affected the characteristics of hemorrhagic gastric/duodenal ulcers.

关键词： Great East Japan Earthquake Disaster Hemorrhagic gastric Duodenal ulcer Helicobacter pylori infection Stress

Optical Beam Controlin Gekko Ⅻ Glass Laser

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光电子·激光 1989年第2期 76-77页

作者： M.NAKATSUKA T.JITSUNO T.KANABE Y.KATO K.MIMA K.NISHIHARA T.SASAKI H.TAKABE T.yamanaka K.YOSHIDA S.NAKAI Institute of Laser engineering Osaka University Suita

After constructions of 10 to 100 KJ glass laser drivers in the world for the inertial confinement fusion, the rapid extension of the experimental researches of the high density compression up to 100 times solid density, the efficient coupling of about 5% between the laser energy to compressed fuel energy have been obtained 1). The key issues of recent developments 2). of the promissing implosion relevantto the energy driver are as follows;

关键词： Glass Laser Optical Beam Controlin Gekko

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根据宽频带P波波形快速确定M_w

世界地震译丛 1996年第4期27卷 62-69页

作者： S.Tsuboi K.Abe K.Takano Y.yamanaka 杨宝仁国家地震局地球物理研究所

本文通过对发生在日本及其周围5～7级地震的宽频带地震图的分析,发展通过初至P波波形确定矩震级的技术。理论上我们把在宽频带地震仪记录的P波段位移作为一个近似的源时间函数,并对其积分,得到在每个台站的标量矩。我们的结果表明,对多... 详细信息

本文通过对发生在日本及其周围5～7级地震的宽频带地震图的分析,发展通过初至P波波形确定矩震级的技术。理论上我们把在宽频带地震仪记录的P波段位移作为一个近似的源时间函数,并对其积分,得到在每个台站的标量矩。我们的结果表明,对多道记录的组合,能在没有进行震源机制校正的情况下给出一个好的矩震级估计值。这个技术相当简单和稳健。因此,它将有效地对大地震可能引起的海啸进行快速评定。

关键词：地震宽频带 P波波形 Mω 地震波