356 results on '"Kazuhiro Matsuda"'
Search Results
102. X‐Ray Compton Scattering Study of Liquid Sodium at Elevated Temperatures
- Author
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Koji Kimura, Kozaburo Tamura, Yukio Kajihara, Nozomu Hiraoka, Yoshiharu Sakurai, Kazuhiro Matsuda, Toru Hagiya, and Masanori Inui
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Liquid metal ,Materials science ,chemistry ,Sodium ,Analytical chemistry ,Compton scattering ,X-ray ,chemistry.chemical_element ,Condensed Matter Physics ,Alkali metal ,Electronic, Optical and Magnetic Materials - Published
- 2020
103. Furnace for Inelastic X‐Ray Scattering from Liquids up to 1600 °C
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Kazuhiko Taguchi, Alfred Q. R. Baron, Yasunori Hattori, Kazuhiro Matsuda, Yukio Kajihara, Daisuke Ishikawa, Yoichi Nakajima, and Masanori Inui
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Condensed Matter - Materials Science ,Physics - Instrumentation and Detectors ,Materials science ,Scattering ,X-ray ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences ,Instrumentation and Detectors (physics.ins-det) ,Atomic physics ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,Liquid dynamics - Abstract
The design and implementation of a furnace for inelastic x-ray scattering from liquids with sample temperatures up to ~1600C is described. Carbon composite heaters operating in vacuum provide robust heating elements: one pair of heaters has been used for >18 days of operational time above 1500C, including 8 cycles to room temperature. High quality data has been obtained to scattering angles as low as 7 mrad in two-theta (Q, 15 pages, 8 Figures, Proceeding of NCM 14
- Published
- 2020
104. Peculiar temperature dependence of dynamical sound speed in liquid Se50Te50 by inelastic x-ray scattering
- Author
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Kazuhiro Matsuda, Masanori Inui, Yukio Kajihara, Yoshimi Tsuchiya, Satoshi Tsutsui, Hiroshi Uchiyama, Alfred Q. R. Baron, and Shinya Hosokawa
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Materials science ,Condensed matter physics ,Scattering ,business.industry ,Dynamic structure factor ,X-ray ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Semiconductor ,Speed of sound ,Picosecond ,0103 physical sciences ,General Materials Science ,Ultrasonic sensor ,010306 general physics ,0210 nano-technology ,business ,Harmonic oscillator - Abstract
Inelastic x-ray scattering (IXS) measurements were carried out on liquid Se50Te50 at temperatures up to 1323 K to investigate how the atomic dynamics changes with temperature through the semiconductor-metal transition. The acoustic mode was clearly observed in the dynamic structure factor and its energy was determined using a damped harmonic oscillator model. The dynamical sound speed obtained by IXS for [Formula: see text] nm-1 was found to behave similarly to the temperature dependence of ultrasonic sound velocity with a minimum near the semiconductor metal transition. The results can be explained by taking liquid Se50Te50 to be an inhomogeneous liquid consisting of metallic and semiconducting domains whose size is approximately 3 nm. The relaxation time obtained from frequency dependence of the dynamical sound speed was on a picosecond time scale.
- Published
- 2020
105. Characterizing crystalline defects in single Xe nanoparticles from angular correlations of single-shot diffracted X-rays
- Author
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Alessandro Colombo, Tetsuo Katayama, Kazuki Asa, Yuta Ito, Akinobu Niozu, Kensuke Tono, M. Bucher, Makina Yabashi, Davide Emilio Galli, Shigeki Owada, Catalin Miron, Tadashi Togashi, Tommaso Pincelli, Takashi Kameshima, Kiyoshi Ueda, M. Di Fraia, Yiwen Li, Toshiyuki Nishiyama, Takaki Hatsui, Liviu Neagu, Giorgio Rossi, Takuma Takanashi, Yoshiaki Kumagai, Y. Sato, Daehyun You, Taishi Ono, Christoph Bostedt, Koji Motomura, K. Nagaya, C. Callegari, Kazuhiro Matsuda, Edwin Kukk, Hironobu Fukuzawa, and Yasumasa Joti
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Diffraction ,History ,Materials science ,Single shot ,Nanoparticle ,Molecular physics ,Computer Science Applications ,Education - Abstract
Synopsis We performed a wide-angle X-ray scattering experiment of single Xe nanoparticles using an X-ray free electron laser. We developed a novel analysis method that focuses on the angular correlation between plural Bragg spots in single-shot diffraction patterns. The angular correlations of the Bragg spots encode rich structural information and offer an evidence of twinning and stacking faults in Xe nanoparticles.
- Published
- 2020
106. Ultrasound with Electromagnetic Tracking Navigation and Image Fusion System in Laparoscopic Liver Surgery: An Initial Clinical Experience
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Kosuke Yamada, Makoto Watanabe, Satoru Goto, Tomokazu Kusano, Tomoki Hakozaki, Kazuhiro Matsuda, Akira Fujimori, Koji Otsuka, Kodai Tomioka, Yoshihiko Tashiro, Takeshi Aoki, Masahiko Murakami, Tomotake Koizumi, Yusuke Wada, Koji Nogaki, and Yuta Enami
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Male ,Liver surgery ,medicine.medical_specialty ,MEDLINE ,030230 surgery ,03 medical and health sciences ,0302 clinical medicine ,Hepatectomy ,Humans ,Medicine ,Electromagnetic tracking ,Ultrasonography, Interventional ,Image fusion ,business.industry ,Liver Neoplasms ,Ultrasound ,General Medicine ,Middle Aged ,Sigmoid Neoplasms ,Surgery, Computer-Assisted ,030220 oncology & carcinogenesis ,Laparoscopy ,Radiology ,Ultrasonography ,business ,Electromagnetic Phenomena - Published
- 2016
107. Dynamic Power Consumption Prediction and Optimization of Data Center by Using Deep Learning and Computational Fluid Dynamics
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Kazuhiro Matsuda, Hayato Kuwahara, Morito Matsuoka, and Ying-Feng Hsu
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Consumption (economics) ,Computer science ,business.industry ,Air conditioning ,Server ,Dynamic demand ,Data center ,Workload ,Computational fluid dynamics ,business ,Simulation ,Data modeling - Abstract
Simply by using computational fluid dynamics (CFD) and a power consumption model incorporating each piece of equipment including servers and air conditioners, we built a power consumption simulator to predict the total power consumption of a data center that can have any device configuration, without having to learn the entire data center in advance. The error of the power consumption model built by this deep learning method was at most 8%. An algorithm with a data center optimizer (DCO) that incorporates the power consumption simulator found the optimum operation parameters of the air conditioners and optimum workload allocation that minimizes the total power consumption. In an actual implementation, the total power consumption fell within 1 second by 8% from the initial state with a uniform workload allocation. The DCO constructed in this research exhibited potential as a practical dynamic optimal task allocation management system for data centers of any size and make up and is applicable not only to dynamic migration within the data center but also to migration between data centers located at different sites.
- Published
- 2018
108. [Present and Future of Navigation Surgery in Hepatobiliary and Pancreatic Surgery]
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Takeshi, Aoki, Yoshihiko, Tashiro, Tomotake, Koizumi, Tomokazu, Kusano, Kazuhiro, Matsuda, Kosuke, Yamada, Koji, Nogaki, Tomoki, Hakozaki, Yusuke, Wada, Hideki, Shibata, Kodai, Tomioka, Takahito, Hirai, Satoru, Goto, Kimiyasu, Yamazaki, Akira, Fujimori, Koji, Otsuka, Yuta, Enami, and Masahiko, Murakami
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Biliary Tract Diseases ,Liver Neoplasms ,Humans ,Pancreatic Diseases ,Digestive System Surgical Procedures - Abstract
Hepatobiliary and pancreatic surgery is recognized as technically demanding due to the complicated local anatomy and diverse anatomical variation that require precise techniques. Therefore, preoperative simulation to understand the detailed local anatomy and intraoperative navigation methods for surgical guidance are needed. Intraoperative navigation for anatomical hepatectomy originated with dye injection into the dominant portal pedicle under intraoperative ultrasound guidance to identify hepatic segments, which was reported by Makuuchi et al in 1985. In recent years, with advancing medical technology, newer medical devices that promote the safety and reliability of various surgical procedures have been developed. In this article, we will discuss the current state and future prospects of intraoperative navigation in hepatobiliary and pancreatic surgery.
- Published
- 2018
109. Secure and Long-Lived Wireless Sensor Network for Data Center Monitoring
- Author
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Yumi Sakemi, Hisashi Kojima, Toyokazu Akiyama, Kazuhiro Matsuda, and Morito Matsuoka
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Authentication ,business.industry ,Wireless network ,Computer science ,010401 analytical chemistry ,020206 networking & telecommunications ,02 engineering and technology ,Energy consumption ,Encryption ,01 natural sciences ,Networking hardware ,0104 chemical sciences ,Power usage effectiveness ,Server ,0202 electrical engineering, electronic engineering, information engineering ,Data center ,business ,Wireless sensor network ,Computer network - Abstract
Reducing energy consumption in data centers is one of the important issues in IT industry. Since Power Usage Effectiveness (PUE) focuses on a fraction of the power consumed by IT equipment such as servers and networking devices, the power consumption of environmental control systems such as Computer Room Air Conditioning (CRAC) is "overhead" in the sense of PUE. In order to improve PUE, dense monitoring of data center environment is required for preventing excessive cooling. One of the promising approaches for dense environment monitoring is utilizing wireless sensor network (WSN). An issue in applying WSN to data centers is message encryption and authentication. Compared to the wired network, wireless network communication might be monitored from the outside of the data center and it becomes a critical issue for data center security. In this paper, we aim to establish secure WSN for data center use cases and several preliminary experiments for applying message encryption and authentication will be discussed.
- Published
- 2018
110. Advantages of a Time-Lapse Imaging System in Assisted Reproductive Technology
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Hiromi Kawasaki, Kazuhiro Matsuda, Yumiho Yamaguchi, Fujiyo Matsushita, Mariko Shinohara, Megumi Suenaga, Noriko Eguchi, and Masanobu Ito
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Assisted reproductive technology ,Reproductive Medicine ,medicine.medical_treatment ,Embryogenesis ,medicine ,Embryo ,Cell Biology ,Blastomere ,Anatomy ,Time-Lapse Imaging ,Biology ,Cell biology - Abstract
Clinical use of a time-lapse system and the develpoment of continuous culture media have enabled the establishment of modern incubation systems which decrease stress on the embryo. Furthermore, the use of a time-lapse system allows the accumulation of successive images of embryonic development. Various embryo morphological kinetics are beginning to be analyzed by using the collected data. A time-lapse system is useful for the accurate evaluation of implantation ability and deciding which embryos should be transferred first. Also, a time-lapse system allows the elimination of embryos which shoud not be transferred because of abnormal cleavage, or a multinucleated blastomere after the 4-cell stage.
- Published
- 2015
111. A novel therapeutic strategy for mycoplasma infectious diseases
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Kazuhiro Matsuda
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Hepatitis ,business.industry ,General Medicine ,Mycoplasma ,medicine.disease ,medicine.disease_cause ,Pneumonia ,Acute disseminated encephalomyelitis ,Immunology ,medicine ,Chronic fatigue syndrome ,Vasculitis ,business ,Meningitis ,Encephalitis - Abstract
Mycoplasma Infectious Diseases (MID) are systemic illnesses that cause vasculitis and neuritis. MID not only includes pneumonia but also diseases such as asthma, arthritis, nephritis, meningitis, encephalitis, dermatitis, pancreatitis, hepatitis, and hematologic illnesses. The broader concept of MID encompasses acute to chronic phases with diverse symptoms. Therefore, it is often confusing and difficult to identify Mycoplasma-infected patients among those with incurable diseases, such as autoimmune diseases, rheumatic diseases, nervous system disorders, and hematological disorders. Regrettably, conventional diagnosis has only been available for pneumonia, although it is critical to identify MID at early stages for effective medical treatment. A cutting-edge technology has made it possible to measure the amount of specific antibodies to species-specific mycoplasma glycolipid-antigens. This new technology provides a reliable marker to follow the state of MID by monitoring antibody titer fluctuations. A novel therapeutic strategy based on new serological diagnostics is introduced in this review.
- Published
- 2015
112. Abstract P5-15-13: Restoration by compression therapy of skin blood perfusion levels decreased during breast cancer chemotherapy, alleviating peripheral neuropathy
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Mikiko Kosaka, Charles de Kerckhove, Maiko de Kerckhove, Hiroki Yoshioka, Kazuhiro Matsuda, Takashi Mine, and Tsuyoshi Ohno
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Cancer Research ,medicine.medical_specialty ,Chemotherapy ,business.industry ,medicine.medical_treatment ,Urology ,Cancer ,Blood flow ,medicine.disease ,Surgery ,Peripheral neuropathy ,Breast cancer chemotherapy ,Breast cancer ,Oncology ,medicine ,business ,Adverse effect ,Perfusion - Abstract
Nanoparticle albumin-bound paclitaxel (nab-PTX) has become a key drug used in chemotherapy for breast cancer, but it often causes adverse effects such as peripheral neuropathy (PN). No effective prophylactic management has so far been established. We have applied a "3S" approach to prevent and treat PN based on two concepts: compression therapy using stockings and sleeves, and medication therapy using selected prophylactic medications. We previously reported better CTCAE v4.0 PN grades and notably superior nab-PTX dose maintenance in a 3S group compared to a control group. However, little is known about the effects of compression therapy on a patient’s level of skin blood perfusion; it is also unknown whether any such effects might vary by 1) PN grade or 2) the number of nab-PTX cycles. To establish whether a compression therapy-skin perfusion relationship exists, the skin perfusion of the lower limbs was measured before and after stocking use in a 3S prophylactic treatment group for nab-PTX therapy (n=44), and in a control group of healthy volunteers (n=50). The skin perfusion was measured using a laser Doppler blood flow meter with an integrated probe (NL-101 Nahri Nexis Japan). To find how compression therapy affects skin perfusion by PN grade, the 3S group was subdivided into three PN grade subgroups (n = 12 for Grade 0, n = 20 for Grade 1, and n = 12 for Grades 2 and 3 combined). To find how compression therapy affects skin perfusion by number of nab-PTX treatment cycles undergone by patients, the 3S group was subdivided into the following three subgroups: 1 to 5 cycles of nab-PTX treatment (first period group; 1P, n=18), 6 to 10 cycles (second period group; 2P, n=16), and more than 10 cycles (third period group; 3P, n=12). In the control group of healthy volunteers, stocking use tended to increase the median skin perfusion level (mL/min/100g) from 10.9 ± 3.8 to 11.8 ± 4.3 (p=0.06). Interestingly, the median skin perfusion level for the 3S group as a whole significantly increased from 8.7 ± 3.3 before stocking use to 11.3 ± 3.8 after stocking use (p< 0.001). When examining the effects of stocking use on skin perfusion by PN grade, the increase in median skin perfusion level was significant in the Grade 0 subgroup (8.2 ± 2.7 to 12.4 ± 4.5, p=0.005), in the Grade 1 subgroup (8.3 ± 3.8 to 10.4 ± 4.0, p=0.0499), and in the Grades 2 and 3 subgroup (7.9 ± 2.3 to 10.6 ± 2.4, p=0.005). When examining the effects of stocking use on skin perfusion by number of treatment cycles, the increase in median skin perfusion level was significant in the 1P subgroup (7.9 ± 3.0 to 11.4 ± 4.8, p=0.007) and in the 2P (7.9 ± 2.9 to 10.8 ± 2.9, p=0.005), but not in the 3P (9.3 ± 3.5 to 10.8 ± 3.2, p=0.15). This study demonstrated that the skin perfusion of the lower limbs is decreased following nab-PTX chemotherapy, and also that the skin perfusion is improved by compression therapy. Compression therapy appeared to successfully restore the skin perfusion levels across every grade of chemotherapy-induced PN. Therefore, our 3S approach is suitable for alleviating CIPN by proactively maintaining skin perfusion from the beginning of nab-PTX therapy. Citation Format: Tsuyoshi Ohno, Takashi Mine, Hiroki Yoshioka, Mikiko Kosaka, Kazuhiro Matsuda, Maiko de Kerckhove, Charles de Kerckhove. Restoration by compression therapy of skin blood perfusion levels decreased during breast cancer chemotherapy, alleviating peripheral neuropathy [abstract]. In: Proceedings of the Thirty-Seventh Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2014 Dec 9-13; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2015;75(9 Suppl):Abstract nr P5-15-13.
- Published
- 2015
113. Factors Determining the Host Range of Two Tortoise Beetles, Cassidanebulosa L. and C. piperata Hope (Coleoptera: Chrysomelidae) in Japan
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Kazuhiro Matsuda and Atsuhiko Nagasawa
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Amaranthus blitum ,Survival period ,Larva ,Tortoise ,biology ,Chenopodium ,fungi ,Botany ,Plant species ,Zoology ,Amaranthaceae ,Cassida nebulosa ,biology.organism_classification - Abstract
We investigated the relationship between host-plant use by two tortoise beetles, Cassida nebulosa and C. piperata, in a field and their performance under laboratory conditions. Sixteen plant species were grown in the experimen- tal field with C. nebulosa being observed to grow on three chenopodiaceous species (Chenopodium album, C. album var. centrorubrum, and C. ficifolium), while C. piperata grew on the same three chenopodiaceous species plus three amaran- thaceous species (Amaranthus blitum, A. hybridus, and A. retroflexus). Host-plant selection in the field was directly corre- lated to the larval growth under laboratory conditions. Thus, the two tortoise beetles selected plant species that were suit- able as larval food under natural conditions. In the laboratory experiments, the survival period of adults and the number of eggs produced showed that adults have wider food ranges than larvae. Therefore, food quality is less important as a limit- ing factor for adults compared to larvae. In addition, the field observation showed that C. nebulosa laid eggs only on suit- able host plant species, whereas C. piperata laid eggs on both suitable hosts and non-hosts.
- Published
- 2015
114. PASSIVE CONTROL DESIGN METHOD FOR MDOF SYSTEM COMPOSED OF BILINEAR + SLIP MODEL ADDED WITH VISCO-ELASTIC DAMPER
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Kazuhiro MATSUDA and Kazuhiko KASAI
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Architecture ,Building and Construction - Published
- 2015
115. Development of a New Bioartificial Liver Support System Using a Radial-flow Bioreactor
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Mitsuo Kusano, Akira Fujimori, Masahiko Murakami, Koji Nogaki, Satoru Goto, Daisuke Yasuda, Makoto Watanabe, Zhenghao Jin, Takeshi Aoki, Osamu Yoshitake, Tomotake Koizumi, Keitaro Mitamura, Yusuke Wada, Kosuke Yamada, Tomokazu Kusano, Koji Otsuka, Yuta Enami, and Kazuhiro Matsuda
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law ,business.industry ,Bioreactor ,Bioartificial liver device ,Medicine ,Radial flow ,Support system ,business ,law.invention ,Biomedical engineering - Published
- 2015
116. Chemical Characterization of Metal/Polymer interface
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Yukiko Izumi, Naoki Baden, and Kazuhiro Matsuda
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chemistry.chemical_classification ,Materials science ,Interface (Java) ,AFM-IR ,Mechanical Engineering ,Metals and Alloys ,Analytical chemistry ,Polymer ,Surfaces, Coatings and Films ,Characterization (materials science) ,Metal ,chemistry ,Chemical engineering ,Mechanics of Materials ,visual_art ,visual_art.visual_art_medium ,Fourier transform infrared spectroscopy - Published
- 2015
117. Efficacy and Safety of an Ultrasonically Activated Device for Sealing the Bile Ducts During Liver Resection
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Reiko Koike, Kodai Tomioka, Kosuke Yamada, Tomoki Hakozaki, Osamu Yoshitake, Masahiko Murakami, Takeshi Aoki, Koji Nogaki, Akira Fujimori, Kazuhiro Matsuda, Tomokazu Kusano, Satoshi Goto, Koji Otsuka, Tomotake Koizumi, Yusuke Wada, Makoto Watanabe, and Yuta Enami
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medicine.medical_specialty ,business.industry ,medicine ,business ,Resection ,Surgery - Published
- 2015
118. Liquid immersion cooling technology with natural convection in data center
- Author
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Kazuhiro Matsuda, Morito Matsuoka, and Hideo Kubo
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Natural convection ,business.industry ,Computer science ,020209 energy ,Nuclear engineering ,02 engineering and technology ,Computational fluid dynamics ,Silicone oil ,Physics::Fluid Dynamics ,Refrigerant ,symbols.namesake ,chemistry.chemical_compound ,chemistry ,Power usage effectiveness ,0202 electrical engineering, electronic engineering, information engineering ,symbols ,Data center ,Central processing unit ,Rayleigh scattering ,business ,Simulation - Abstract
We proposed a liquid immersion cooling technology with natural convection for high power server boards used in data centers with high cooling-efficiency. The cooling performance was evaluated by CFD simulation and actual experiments. As the refrigerants, several non-conductive, thermally and chemically stable fluids were applied, including silicone oil, soybean oil, and perfluorocarbon structured liquids. The CPU temperature in the refrigerant monotonically decreases with the Rayleigh numbers of the refrigerant. The smoother refrigerant is better for cooling the high power CPU. The changes in any CPU task and any slot-removal give limited cooling effects to other slots and other CPUs. These are quite useful features for stable operation of servers in data center. As a result, this proposed technology with natural convection exhibits promising potential for low energy and space-saving board cooling which demonstrates a Power Usage Efficiency (PUE) below 1.04.
- Published
- 2017
119. Chemosynthetic homologues of Mycoplasma pneumoniae β-glycolipid antigens for the diagnosis of mycoplasma infectious diseases
- Author
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Kazuo Fukuda, Hirofumi Dohi, Sachie Matsuda, Yoshihiro Nishida, Kazuhiro Matsuda, Sayaka Kado, and Hyuma Masu
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0301 basic medicine ,Mycoplasma pneumoniae ,Spectrometry, Mass, Electrospray Ionization ,Magnetic Resonance Spectroscopy ,medicine.drug_class ,Electrospray ionization ,030106 microbiology ,Clinical Biochemistry ,Disaccharide ,Pharmaceutical Science ,Enzyme-Linked Immunosorbent Assay ,medicine.disease_cause ,Monoclonal antibody ,Biochemistry ,Epitope ,03 medical and health sciences ,chemistry.chemical_compound ,Glycolipid ,Antigen ,Drug Discovery ,Pneumonia, Mycoplasma ,medicine ,Humans ,Antigens ,Molecular Biology ,Chemistry ,Organic Chemistry ,food and beverages ,Antibodies, Monoclonal ,Mycoplasma ,030104 developmental biology ,Molecular Medicine ,lipids (amino acids, peptides, and proteins) ,Glycolipids - Abstract
Mycoplasma pneumoniae expresses β-glycolipids (β-GGLs) in cytoplasmic membranes, which possess a unique β(1 → 6)-linked disaccharide epitope, which has high potential in biochemical and medicinal applications. In the present study, a series of β-GGLs homologues with different acyl chains (C12, C14, C16, and C18) were prepared from a common precursor. An ELISA assay using an anti-(β-GGLs) monoclonal antibody indicated that the synthetic homologues with long acyl chains had greater diagnostic potential in the order C18 > C16 > C14 > C12. Toward a simultaneous detection of natural glycolipids by mass spectrometry (MS), a deuterium-labeled C16 homologue (β-GGL-C16-d3) was prepared and applied as an internal standard for a high-resolution electrospray ionization MS (ESI-MS) analysis. The ESI-MS analysis was used to identify and quantify acyl homologues (C16/C16, C16/C18, and C18/C18) of β-GGL-C16 in cultured M. pneumoniae. A β-GGLs homologue with a 1,2-diacetyl group (C2) was also prepared as a “water soluble” glycolipid homologue and characterized by 1H NMR spectroscopy. We envisage that each of these chemosynthetic homologues will provide promising approaches to solve medical and biological problems associated with mycoplasma infectious diseases (MIDs).
- Published
- 2017
120. X-Ray Scattering Studies of Expanded Fluid Metals
- Author
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Masanori Inui and Kazuhiro Matsuda
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Physics::Fluid Dynamics ,Materials science ,Scattering ,0103 physical sciences ,X-ray ,Analytical chemistry ,02 engineering and technology ,021001 nanoscience & nanotechnology ,010306 general physics ,0210 nano-technology ,01 natural sciences - Abstract
Fluid metals exhibit significant properties of thermodynamic-state dependence, since the inter-particle interaction among the constituents (electrons and ions) considerably changes depending on their thermodynamic conditions. The authors have thus far carried out X-ray scattering experiments of fluid metals in the expanded state, which have enabled them to gain insight into microscopic understanding of the structural and electronic properties of fluid metals. The purpose of this chapter is to provide intriguing aspects of fluid metals originated from the existence of conduction electrons, which distinguishes fluid metals from non-conducting fluids, through the results of fluid rubidium and mercury.
- Published
- 2017
121. Full-scale dynamic testing of response-controlled buildings and their components: concepts, methods, and findings
- Author
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Kazuhiro Matsuda and Kazuhiko Kasai
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Engineering ,Viscous damper ,business.industry ,Mechanical Engineering ,Frame (networking) ,Full scale ,Building and Construction ,Structural engineering ,Geotechnical Engineering and Engineering Geology ,Damper ,Steel frame ,2008 California earthquake study ,business ,Civil and Structural Engineering ,Dynamic testing - Abstract
A series of shake-table tests was conducted by inserting and replacing 4 different types of dampers, or by removing them in a full-scale 5-story steel frame building. The objective is to validate response-control technologies that are increasingly adopted for major Japanese buildings without being attested to-date by a major earthquake. Test results are briefly described, and good performance of the dampers and frame demonstrated. The concepts of the full-scale building tests and various contributions are discussed. The difficulty associated with full-scale dynamic testing is explained.
- Published
- 2014
122. Lipid compounds analysis with MeV-SIMS apparatus for biological applications
- Author
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Jiro Matsuo, Takaaki Aoki, Makiko Fujii, Toshio Seki, Naoki Man, Kazuhiro Matsuda, and Masakazu Kusakari
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Detection limit ,Resolution (mass spectrometry) ,Chemistry ,Ion yield ,Analytical chemistry ,Surfaces and Interfaces ,General Chemistry ,Condensed Matter Physics ,Surfaces, Coatings and Films ,Ion ,Organic molecules ,Secondary ion mass spectrometry ,Materials Chemistry ,Mass spectrum ,Mass analysis - Abstract
Secondary ion mass spectrometry (SIMS) is one of the powerful methods that can be applied to high sensitivity mass analysis and high-spatial resolution mass imaging. For the analysis of minor components of the complex biological samples, however, superior sensitivity with low background is required. We have developed an MeV-SIMS apparatus with distinctively high secondary ion yield for large organic molecules. In this study, the detection limit of our original MeV-SIMS apparatus was investigated using compounds of two lipids. In the acquired mass spectra, the molecular ions of both lipids were clearly observed with high quantitativity. In addition, the results were compared with conventional time-of-flight-SIMS results. As a result, the detection limit of MeV-SIMS apparatus was found to be below 0.1% and was much lower than that of the conventional Bi cluster SIMS. Copyright © 2014 John Wiley & Sons, Ltd.
- Published
- 2014
123. Study on the detection limits of a new argon gas cluster ion beam secondary ion mass spectrometry apparatus using lipid compound samples
- Author
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Naoki Man, Takaaki Aoki, Shunichirou Nakagawa, Jiro Matsuo, Toshio Seki, Makiko Fujii, and Kazuhiro Matsuda
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Secondary ion mass spectrometry ,Detection limit ,Static secondary-ion mass spectrometry ,Ion beam ,Gas cluster ion beam ,Chemistry ,Organic Chemistry ,Mass spectrum ,Analytical chemistry ,Mass spectrometry ,Spectroscopy ,Analytical Chemistry ,Ion - Abstract
RATIONALE Ar gas cluster ion beam secondary ion mass spectrometry (Ar-GCIB SIMS) has been developed as one of the most powerful tools used for analyzing complex biological materials because of its distinctively high secondary ion yield of large organic molecules. However, for the practical analysis of minor components in complex biological materials, the sensitivity of the technique is still insufficient. METHODS The detection limits of our original Ar-GCIB SIMS apparatus were investigated by measuring lipid compound samples in positive ion mode. The samples were mixtures of 1,2-distearoyl-sn-glycero-3-phosphocholine (C44H88NO8P, DSPC) and 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (C40H80NO8P, DPPC). The primary ions were accelerated with 10 keV and the mean cluster size was 1500. The secondary [M+H]+ ions emitted from the sample were analyzed using an orthogonal acceleration time-of-flight mass spectrometer (oa-TOF-MS). In addition, the isotope abundance ratio and the ratio of the [M+H]+ ion signal to the fragment ion signal acquired with Ar-GCIB SIMS were compared with those obtained with conventional Bi cluster SIMS. RESULTS Secondary [M+H]+ ions and some characteristic fragment ions were clearly observed with high quantitative accuracy in the mass spectra acquired with Ar-GCIB SIMS. The results were clearly better than those obtained with conventional Bi cluster SIMS. CONCLUSIONS The detection limit of Ar-GCIB SIMS was found to be below 0.1% and was much lower than that of conventional Bi cluster SIMS because of the high [M+H]+ ion yield and the low background. The results suggested that the new Ar-GCIB SIMS apparatus has the capability to acquire valuable information on complex biological materials. Copyright © 2014 John Wiley & Sons, Ltd.
- Published
- 2014
124. STUDY ON DYNAMIC BEHAVIOR OF HIGH-RISE BASE-ISOLATED BUILDING BASED ON ITS RESPONSES RECORDED DURING THE 2011 TOHOKU-OKI EARTHQUAKE
- Author
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Kazuhiko Kasai and Kazuhiro Matsuda
- Subjects
Architecture ,Building and Construction ,Base (exponentiation) ,Seismology ,Geology ,High rise - Published
- 2014
125. Multispectroscopic Study of Single Xe Clusters Using XFEL Pulses
- Author
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Kiyoshi Ueda, T. Sakai, Takayuki Umemoto, Christophe Nicolas, Toshiyuki Nishiyama, Christopher Hutchison, Yuta Ito, Hironobu Fukuzawa, Yasumasa Joti, Shin-ichi Wada, Catalin Miron, Kiyonobu Nagaya, Kazuhiro Matsuda, Koji Motomura, Weiqing Xu, Tetsuya Tachibana, Makina Yabashi, S. Mondal, K. Matsunami, Christoph Bostedt, Kensuke Tono, Ken R. Ferguson, Takaki Hatsui, Takashi Kameshima, Kyoto University, Argonne National Laboratory [Lemont] (ANL), Murdoch University, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University [Sendai], RIKEN Center for Brain Science [Wako] (RIKEN CBS), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), RIKEN SPring-8 Center [Hyogo] (RIKEN RSC), Beihang University (BUAA), Hiroshima University, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Japan Synchrotron Radiation Research Institute [Hyogo] (JASRI), IMRAM, Kyoto University [Kyoto], and Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Materials science ,chemistry.chemical_element ,02 engineering and technology ,lcsh:Technology ,01 natural sciences ,Fluence ,Fluorescence spectroscopy ,law.invention ,Ion ,lcsh:Chemistry ,SACLA ,Xenon ,law ,0103 physical sciences ,General Materials Science ,010306 general physics ,Spectroscopy ,lcsh:QH301-705.5 ,Instrumentation ,diffractive imaging ,[PHYS]Physics [physics] ,Fluid Flow and Transfer Processes ,lcsh:T ,Scattering ,XFEL ,Process Chemistry and Technology ,General Engineering ,fluorescence spectroscopy ,021001 nanoscience & nanotechnology ,Laser ,lcsh:QC1-999 ,Computer Science Applications ,ion spectroscopy ,lcsh:Biology (General) ,lcsh:QD1-999 ,chemistry ,lcsh:TA1-2040 ,Atomic physics ,lcsh:Engineering (General). Civil engineering (General) ,0210 nano-technology ,lcsh:Physics - Abstract
X-ray free-electron lasers (XFELs) deliver ultrashort coherent laser pulses in the X-ray spectral regime, enabling novel investigations into the structure of individual nanoscale samples. In this work, we demonstrate how single-shot small-angle X-ray scattering (SAXS) measurements combined with fluorescence and ion time-of-flight (TOF) spectroscopy can be used to obtain size- and structure-selective evaluation of the light-matter interaction processes on the nanoscale. We recorded the SAXS images of single xenon clusters using XFEL pulses provided by the SPring-8 Angstrom compact free-electron laser (SACLA). The XFEL fluences and the radii of the clusters at the reaction point were evaluated and the ion TOF spectra and fluorescence spectra were sorted accordingly. We found that the XFEL fluence and cluster size extracted from the diffraction patterns showed a clear correlation with the fluorescence and ion TOF spectra. Our results demonstrate the effectiveness of the multispectroscopic approach for exploring laser&ndash, matter interaction in the X-ray regime without the influence of the size distribution of samples and the fluence distribution of the incident XFEL pulses.
- Published
- 2019
126. Electron spectroscopic study of nanoplasma formation triggered by intense soft x-ray pulses
- Author
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Tadashi Togashi, Tomohiro Sakurazawa, Hironobu Fukuzawa, Toshiyuki Nishiyama, Taishi Ono, Makina Yabashi, XiaoJing Liu, Sven Grundmann, Naomichi Yokono, Kazuhiro Matsuda, Tsukasa Takanashi, Thomas Gaumnitz, Kiyonobu Nagaya, Yiwen Li, Daehyun You, Kirill Gokhberg, Lorenz S. Cederbaum, Akinobu Niozu, Markus Schöffler, Kensuke Tono, Shigeki Owada, Paolo Carpeggiani, Alexander I. Kuleff, Kiyoshi Ueda, Wei Qing Xu, Nikolai V. Kryzhevoi, and Shin-ichi Wada
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010304 chemical physics ,media_common.quotation_subject ,Free-electron laser ,General Physics and Astronomy ,Frustration ,chemistry.chemical_element ,Thermionic emission ,Electron ,010402 general chemistry ,01 natural sciences ,Electron spectroscopy ,Spectral line ,0104 chemical sciences ,Xenon ,chemistry ,Ionization ,0103 physical sciences ,Physics::Accelerator Physics ,Physical and Theoretical Chemistry ,Atomic physics ,media_common - Abstract
Using electron spectroscopy, we investigated the nanoplasma formation process generated in xenon clusters by intense soft x-ray free electron laser (FEL) pulses. We found clear FEL intensity dependence of electron spectra. Multistep ionization and subsequent ionization frustration features are evident for the low FEL-intensity region, and the thermal electron emission emerges at the high FEL intensity. The present FEL intensity dependence of the electron spectra is well addressed by the frustration parameter introduced by Arbeiter and Fennel [New J. Phys. 13, 053022 (2011)].
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- 2019
127. Structural studies on fluid sulfur at high temperatures and high pressures: I. Atomic dynamics investigated by inelastic x-ray scattering
- Author
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Kazuhiro Matsuda, Yukio Kajihara, Ayano Chiba, Alfred Q. R. Baron, Satoshi Tsutsui, and Masanori Inui
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Materials science ,Scattering ,Dynamic structure factor ,Condensed Matter Physics ,Molecular physics ,Spectral line ,Supercritical fluid ,Electronic, Optical and Magnetic Materials ,Critical point (thermodynamics) ,Speed of sound ,Materials Chemistry ,Ceramics and Composites ,Melting point ,Excitation - Abstract
Inelastic x-ray scattering spectra of fluid S were measured from 403 K near the melting point to 1343 K in the supercritical region at 25 MPa. Although the dynamic structure factor in the supercritical region exhibits a single peak profile, the spectrum includes collective inelastic excitations besides the quasielastic component. The acoustic excitation energy in the supercritical region is close to the one predicted by the sound speed in the fluid consisting of S8 molecules and the observed excitation energies of the stretching modes in S molecules suggest that few fraction of S2 molecules in the supercritical region near the liquid-vapor critical point. This result indicates that the nearest neighbor coordination number in the supercritical fluid S obtained by x-ray diffraction [Inui et al., J. Phys. Conf. Ser. 98 (2008) 012008] was underestimated.
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- 2019
128. Tu1591 – Laparoscopic Liver Resection with Fluorescent Imaging Technology
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Kodai Tomioka, Tomoki Hakozaki, Satoru Goto, Tomotake Koizumi, Osamu Yoshitake, Yusuke Wada, Takahito Hirai, Makoto Watanabe, Yoshihiko Tashiro, Hideki Shibata, Koji Nogaki, Kimiyasu Yamazaki, Masahiko Murakami, Kosuke Yamada, Koji Otsuka, Takeshi Aoki, Kazuhiro Matsuda, Akira Fujimori, Yuta Enami, and Tomokazu Kusano
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medicine.medical_specialty ,Hepatology ,business.industry ,Gastroenterology ,Medicine ,Radiology ,Fluorescent imaging ,business ,Resection - Published
- 2019
129. Su1765 – Evaluation of a Transumbilical Incision As an Approach for Organ Removal in Laparoscopic Gastric and Colorectal Surgery
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Yoshihiko Tashiro, Makoto Watanabe, Takahito Hirai, Tomokazu Kusano, Hideki Shibata, Reiko Koike, Osamu Yoshitake, Satoru Goto, Tomoki Hakozaki, Masahiko Murakami, Takeshi Aoki, Tomotake Koizumi, Keitaro Mitamura, Koji Nogaki, Kazuhiro Matsuda, Kodai Tomioka, Kosuke Yamada, Yusuke Wada, Akira Fujimori, Kimiyasu Yamazaki, Yuta Enami, and Koji Otsuka
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medicine.medical_specialty ,Hepatology ,business.industry ,Gastroenterology ,medicine ,business ,Colorectal surgery ,Surgery - Published
- 2019
130. Mo1413 – The Correlation Between the Remnant Pancreatic Volume and Postoperative Endcrine Function After Pancreaticoduodenectomy
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Yusuke Wada, Takeshi Aoki, Tomokazu Kusano, Tomotake Koizumi, Tomoki Hakozaki, Takahito Hirai, Akira Fujimori, Yoshihiko Tashiro, Kazuhiro Matsuda, Kosuke Yamada, Kodai Tomioka, Masahiko Murakami, Tatsuya Yamazaki, Koji Nogaki, and Yuta Enami
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Hepatology ,Volume (thermodynamics) ,business.industry ,medicine.medical_treatment ,Gastroenterology ,Medicine ,Function (mathematics) ,business ,Nuclear medicine ,Pancreaticoduodenectomy - Published
- 2019
131. 1045 – Clinicopathologic Study of Surgical Margin for Liver Resection Using Near-Infrared Fluorescent Imaging and Fluorescent Microscope
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Masahiko Murakami, Takeshi Aoki, Tomoki Hakozaki, Yoshihiko Tashiro, Tatsuya Yamazaki, Tomotake Koizumi, Marie Uchida, Yuta Enami, Hideki Shibata, Kodai Tomioka, Kazuhiro Matsuda, Koji Nogaki, Tomokazu Kusano, Yusuke Wada, Akira Fujimori, and Takahito Hirai
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Surgical margin ,Materials science ,Hepatology ,business.industry ,Near-infrared spectroscopy ,Gastroenterology ,Fluorescence microscope ,Nuclear medicine ,business ,Fluorescent imaging ,Resection - Published
- 2019
132. Laparoscopic Treatment of a Hepatoduodenal LigamentS chwannoma With Infrared Indocyanine Green Fluorescence.
- Author
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KAZUHIRO MATSUDA, KOJI NOGAKI, YOSHIHIKO TASHIRO, YUSUKE WADA, TOMOKI HAKOZAKI, HIDEKI SHIBATA, TAKAHITO HIRAI, TATSUYA YAMAZAKI, KAZUHIKO SAITO, YUTA ENAMI, IKUYA SUGIURA, YOKO NAKAJIMA, JUN ARAI, ATSUSHI KAJIWARA, SHOJIRO UOZUMI, YU SHIMOZUMA, MANABU UCHIKOSHI, MASASHI SAKAKI, HITOSHI YOSHIDA, and SAKIKO MIURA
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INDOCYANINE green ,SCHWANNOMAS ,LAPAROSCOPY ,HISTOPATHOLOGY ,INTRAOPERATIVE care ,MAGNETIC resonance imaging - Abstract
Schwannomas occurring in the hepatoduodenal ligament are extremely rare, with only four cases reported. Here, we describe a case of a 30-mm schwannoma that originated in the hepatoduodenal ligament of a 38-year-old female found during a periodic medical check-up. Magnetic resonance imaging demonstrated a tumor in the hepatoduodenal ligament. Following an ultrasound-guided microbiopsy, histological examination showed solitary fibrous tumor or schwannomas in the liver or originating from the hepαtoduodenal ligament. The relationship between the tumor and associated organs was confirmed intraoperatively, and the tumor was removed safely in its entirety using indocyanine green. The postoperative histopathological examination revealed the presence of a schwannoma with typical characteristics. To our knowledge, this is the first case of hepatoduodenal ligament schwannoma treated by laparoscopic surgery using indocyanine green fluorescence imaging. [ABSTRACT FROM AUTHOR]
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- 2020
- Full Text
- View/download PDF
133. Chemical order in liquid As2Se3 at high temperatures obtained by X-ray scattering and reverse Monte Carlo modeling
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Kazuhiro Matsuda, Takayuki Fukumaru, Mingfa Yao, Masanori Inui, Koji Kimura, and Yukio Kajihara
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Diffraction ,Scattering ,Chemistry ,Coordination number ,Analytical chemistry ,Pair distribution function ,Synchrotron radiation ,Reverse Monte Carlo ,Condensed Matter Physics ,Molecular physics ,Electronic, Optical and Magnetic Materials ,Molecular dynamics ,Materials Chemistry ,Ceramics and Composites ,Structure factor - Abstract
X-ray scattering experiments for liquid As 2 Se 3 were carried out at high temperatures up to 1673 K at 6 MPa, using synchrotron radiation at SPring-8 in Japan, and the structure factor with reasonably nice statistics is obtained. The first peak position in the pair distribution function slightly shifts to smaller distance and the first minimum at 2.7 A develops, as the metallic properties are enhanced with increasing temperatures. A first sharp diffraction peak at 1.2 A − 1 in the structure factor becomes broad with an increasing temperature. The partial structure factors in liquid As 2 Se 3 were deduced by Reverse Monte Carlo modeling constrained by partial coordination number fractions reported by the first principles molecular dynamics simulations. Chemical order correlated with the medium range order expected by the first sharp diffraction peak is discussed on the basis of results from the Reverse Monte Carlo modeling.
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- 2013
134. Performance of Seismic Protection Technologies during the 2011 Tohoku-Oki Earthquake
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Andrew W. Taylor, Kazuhiko Kasai, Akira Mita, Troy A. Morgan, Kazuhiro Matsuda, and Haruyuki Kitamura
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Earthquake engineering ,Engineering ,business.industry ,Vibration control ,Geotechnical Engineering and Engineering Geology ,Earthquake scenario ,Geophysics ,Seismic hazard ,Earthquake simulation ,Urban seismic risk ,Seismic retrofit ,Seismic protection ,business ,Seismology - Abstract
Many buildings in the Tohoku and Kanto area were strongly shaken during the Tohoku-oki earthquake on 11 March 2011. Soon after the earthquake, the Japan Society of Seismic Isolation (JSSI) established committees to investigate the performance of structures where modern seismic protection methods were used. Since response-control technologies are relatively new, few systems had been validated with actual earthquakes. Generally, the various buildings performed well, and there were no failures of superstructures of base-isolated or supplementally damped buildings. Failures of numerous expansion joints and lead dampers in base-isolated buildings are described. Acceleration records of both base-isolated and supplementally damped buildings are analyzed and their seismic performance characteristics are discussed.
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- 2013
135. Outcomes of Hepatectomy for Liver Metastasis of Gastric Cancer
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Akira Fujimori, Tomotake Koizumi, Yusuke Tajima, Masahiko Murakami, Kazuhiro Matsuda, Makoto Watanabe, Koji Otsuka, Takeshi Aoki, Kosuke Yamada, Kimiyasu Yamazaki, Yuta Enami, and Takashi Kato
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Oncology ,medicine.medical_specialty ,business.industry ,Internal medicine ,medicine.medical_treatment ,medicine ,Cancer ,Hepatectomy ,medicine.disease ,business ,Metastasis - Published
- 2013
136. Augmented Data Center Infrastructure Management System for Minimizing Energy Consumption
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Morito Matsuoka, Yutaka Nakamura, and Kazuhiro Matsuda
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Data processing ,business.industry ,Computer science ,020209 energy ,Testbed ,Real-time computing ,Cloud computing ,02 engineering and technology ,Energy consumption ,Reliability engineering ,Energy management system ,Power usage effectiveness ,Server ,0202 electrical engineering, electronic engineering, information engineering ,Data center ,business - Abstract
The significant continuous increase in the power consumption of data centers, brought about by the adoption of cloud computing, is a major social problem. Moreover, the demand for data centers is expected to grow owing to the increasing requirement for data processing related to Internet of Things (IoT) applications. Consequently, reducing the power consumption of data centers has become an urgent and major issue. Modification of the operational settings of equipment residing in a data center leads to fluctuations in the power consumption of other equipment due to their complex interdependencies. Therefore, to reduce the total power consumption of the data center, it is not sufficient to reduce the power consumption of each piece of equipment, but one should consider the dependencies among the data center equipment. In other words, a coordinated control of the operational settings accounting for interdependencies among equipment is required to reduce the total power consumption of data centers. In this study, a data center energy management system focusing on the coordinated control of equipment in a data center is proposed. In the proposed system, the operational settings are determined using power consumption prediction that is based on the machine learning methods. We design a data center control system focusing on the task assignment of servers and air conditioner settings, and this system determines their settings based on a genetic algorithm. The proposed system is evaluated by experiments in our data center testbed and the evaluation results indicate that the proposed system reduces the total power consumption of the data center.
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- 2016
137. IEEE1888 over WebSocket for Communicating across a Network Boundary
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Morito Matsuoka, Yuya Tarutani, Shuuichirou Murata, and Kazuhiro Matsuda
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0301 basic medicine ,03 medical and health sciences ,030104 developmental biology ,WebSocket ,business.industry ,Computer science ,Distributed computing ,business ,Internet of Things ,Boundary (real estate) ,Computer network - Abstract
Some communications between devices are limited by network boundaries for ensuring security. In these cases, IEEE1888 does not provide inter-device communication. We thus propose IEEE1888 over WebSocket for communication between devices across network boundaries. In IEEE1888 over WebSocket, two devices are added to an IEEE1888 network for communication across network boundaries, so devices using traditional IEEE1888 need not to be changed. We implemented an experimental system of IEEE1888 overWebSocket. The results shows that IEEE1888 over WebSocket enables communication across network boundaries.
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- 2016
138. An easy α-glycosylation methodology for the synthesis and stereochemistry of mycoplasma α-glycolipid antigens
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Sachie Matsuda, Kazuo Fukuda, Yuan Mengfei, Yuko Shingu, Kazuhiro Matsuda, Yoshihiro Nishida, and Hirofumi Dohi
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Glycosylation ,glycosylation ,Stereochemistry ,Full Research Paper ,lcsh:QD241-441 ,chemistry.chemical_compound ,Glycolipid ,lcsh:Organic chemistry ,Phosphatidylcholine ,mycoplasma ,lcsh:Science ,Conformational isomerism ,Phosphocholine ,Mycoplasma fermentans ,glycolipid antigen ,biology ,cytoplasm membrane ,Organic Chemistry ,stereochemistry ,Diastereomer ,biology.organism_classification ,Chemistry ,chemistry ,Biochemistry ,Cytoplasm ,lipids (amino acids, peptides, and proteins) ,lcsh:Q - Abstract
Mycoplasma fermentans possesses unique α-glycolipid antigens (GGPL-I and GGPL-III) at the cytoplasm membrane, which carry a phosphocholine group at the sugar primary (6-OH) position. This paper describes a practical synthetic pathway to a GGPL-I homologue (C16:0) and its diastereomer, in which our one-pot α-glycosylation method was effectively applied. The synthetic GGPL-I isomers were characterized with 1H NMR spectroscopy to determine the equilibrium among the three conformers (gg, gt, tg) at the acyclic glycerol moiety. The natural GGPL-I isomer was found to prefer gt (54%) and gg (39%) conformers around the lipid tail, while adopting all of the three conformers with equal probability around the sugar position. This property was very close to what we have observed with respect to the conformation of phosphatidylcholine (DPPC), suggesting that the Mycoplasma glycolipids GGPLs may constitute the cytoplasm fluid membrane together with ubiquitous phospholipids, without inducing stereochemical stress.
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- 2012
139. Importance of Vibration Sensitivity in Fall Risk Evaluation -Deterioration of Vibration Sense has no Influence on Fear of Fall or Activity
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Hideyuki Fukubayashi, Atsushi Takao, Kazuhiro Matsuda, Tatsuya Yasukawa, Masaharu Sugimoto, Yoshiyuki Yoshikawa, Shin Takeuchi, Hiroyuki Kajita, and Yuri Inoue
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medicine.medical_specialty ,Physical medicine and rehabilitation ,business.industry ,Vibration sense ,medicine ,Physical Therapy, Sports Therapy and Rehabilitation ,Fall risk ,Audiology ,business - Abstract
〔目的〕転倒リスク管理における振動覚検査の有用性を検討することである.〔対象〕地域在住高齢者50名とした.〔方法〕振動覚検査,Timed “Up & Go” Test (TUG),膝伸展筋力測定,転倒恐怖感・活動性の調査を実施した.転倒の有無により転倒群と非転倒群に分け,各項目の2群の結果を比較した.また,転倒恐怖感・活動性とその他の各検査との関連性を調べた.〔結果〕振動覚検査,TUG,転倒恐怖感は,転倒群に比べ非転倒群の成績が有意に優れていた.転倒恐怖感・活動性は,運動能力と有意な相関を認め,振動覚との相関はみられなかった.〔結語〕振動覚は,転倒恐怖感や活動性と関連性がなく,運動能力の高い高齢者の転倒リスク評価に有用であると示唆された.
- Published
- 2012
140. Characteristics of Silicon Carbide Schottky Barrier Diodes and Confirmation of Power Loss Reduction Effects
- Author
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Kazuhiro Matsuda, Hiraoka Hironori, Noboru Ohtani, Yoshikazu Nishimura, and Tadaaki Kaneko
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Reduction (complexity) ,chemistry.chemical_compound ,Power loss ,Materials science ,chemistry ,business.industry ,Schottky barrier ,Silicon carbide ,Optoelectronics ,Schottky diode ,business ,Metal–semiconductor junction ,Diode - Published
- 2012
141. SEISMIC RESPONSE ANALYSIS OF 2-STORY WOODEN STRUCTURE WITH PASSIVE CONTROL SYSTEM USING FRAME MODEL
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Kazuhiko Kasai, Kazuhiro Matsuda, and Hiroyasu Sakata
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Structure (mathematical logic) ,Engineering ,Seismic response analysis ,business.industry ,Architecture ,Frame (networking) ,Building and Construction ,Structural engineering ,business ,Passive control - Published
- 2012
142. The Formation of an Epitaxial-Graphene Cap Layer for Post-Implantation High Temperature Annealing of SiC and its In Situ Removal by Si-Vapor Etching
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Tadaaki Kaneko, Kazuhiro Matsuda, Ayumu Adachi, Noboru Ohtani, and Shoji Ushio
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In situ ,Materials science ,business.industry ,Annealing (metallurgy) ,Graphene ,Mechanical Engineering ,Nanotechnology ,Condensed Matter Physics ,Epitaxy ,Buffer (optical fiber) ,law.invention ,symbols.namesake ,Mechanics of Materials ,law ,Homogeneity (physics) ,symbols ,Optoelectronics ,General Materials Science ,Sublimation (phase transition) ,business ,Raman spectroscopy - Abstract
As a new graphene functionality applicable to post-implantation high temperature annealing of SiC, a method of in situ formation and removal of large area epitaxial few-layer graphene on 4H-SiC(0001) Si-face is proposed. It is demonstrated that the homogeneous graphene layer formed by Si sublimation can be preserved without the decomposition of the underlying SiC substrate even in the excess of 2000 oC in ultrahigh vacuum. It is due to the existence of the stable (6√3×6√3) buffer layer at the interface. To ensure this cap function, the homogeneity of the interface must be guaranteed. In order to do that, precise control of the initial SiC surface flatness is required. Si-vapor etching is a simple and versatile SiC surface pre/post- treatment method, where thermally decomposed SiC surface is compensated by a Si-vapor flux from Si solid source in the same semi-closed TaC container. While this Si-vapor etching allows precise control of SiC etch depth and surface step-terrace structures, it also provides a “decap” function to remove of the graphene layer. The surface properties after the each process were characterized by AFM and Raman spectroscopy.
- Published
- 2011
143. Chemicals affecting the feeding preference of the Solanaceae-feeding lady beetle Henosepilachna vigintioctomaculata (Coleoptera: Coccinellidae)
- Author
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H. Nakamura, Masatoshi Hori, Kazuhiro Matsuda, Y. Fujii, and Y. Suzuki
- Subjects
Tomatine ,Sucrose ,biology ,Linolenic acid ,fungi ,food and beverages ,biology.organism_classification ,chemistry.chemical_compound ,Horticulture ,chemistry ,Insect Science ,Botany ,Coccinellidae ,Sugar ,Henosepilachna vigintioctomaculata ,Agronomy and Crop Science ,Unsaturated fatty acid ,Solanaceae - Abstract
The phytophagous lady beetle, Henosepilachna vigintioctomaculata, feeds mainly on potato, tomato, and eggplant leaves. The methanol extracts of tomato and eggplant leaves stimulated feeding activity in the adult beetles. The feeding stimulants from the lipid-soluble fractions of tomato and eggplant leaves were found to be same compounds, identified as methyl linoleate and methyl linolenate. The feeding stimulants in the aqueous fractions of tomato leaves were identified as three sugars – fructose, glucose, and sucrose – and in eggplant leaves, the feeding stimulant was one sugar, sucrose. Although methyl linoleate and methyl linolenate were inactive without sugars, they acted synergistically with sugars, and the amounts of methyl linoleate, methyl linolenate, and sugars contained in tomato and eggplant leaves were adequate to stimulate feeding activity in the beetles. It is suggested that the synergisms of methyl esters of unsaturated fatty acid and sugars play important roles in host selection of this insect. Solanaceae species are often rich in alkaloids, which act as feeding deterrents for many insect species. Leaves of potato, Chinese wolfberry, and black nightshade, which are suitable hosts of H. vigintioctomaculata, contain α-solanine and α-chaconine as the main alkaloids. A mixture of α-solanine and α-chaconine showed neither feeding stimulant nor inhibitory activity at a concentration of 1 g leaf equivalents of the above plants. α-Solanine and tomatine contained in tomato did not inhibit the beetle’s feeding at a concentration of 0.5%. On the contrary, nicotine and capsaicin contained in non-hosts (tobacco and red pepper, respectively) showed feeding deterrent activities at a concentration of 0.1%. It is thought that adaptation of the beetles to alkaloids contained in solanaceous hosts also plays an important role in their host selection.
- Published
- 2011
144. SEISMIC RESPONSE ANALYSIS OF WOODEN STRUCTURE WITH PASSIVE CONTROL SYSTEM USING FRAME MODEL
- Author
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Kazuhiro MATSUDA, Kazuhiko KASAI, and Hiroyasu SAKATA
- Subjects
Architecture ,Building and Construction - Published
- 2011
145. Static and dynamic structures of liquid Ba8Ga16Sn30: a melt of the thermoelectric clathrate compounds
- Author
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Kazuhiro Matsuda, Yoichi Nakajima, Shinya Hosokawa, Satoshi Tsutsui, Masanori Inui, Toshiro Takabatake, Koichiro Suekuni, Koji Ohara, Yukio Kajihara, and Hiroshi Uchiyama
- Subjects
Diffraction ,Materials science ,Scattering ,Dynamic structure factor ,Momentum transfer ,Pair distribution function ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Molecular physics ,0103 physical sciences ,Atom ,General Materials Science ,010306 general physics ,0210 nano-technology ,Pair potential ,Excitation - Abstract
X-ray diffraction and inelastic x-ray scattering measurements of liquid Ba8Ga16Sn30 have been carried out to investigate local structure and atomic dynamics in the liquid. The pair distribution function shows shorter and longer interatomic distances in the first coordination shell. The dynamic structure factor exhibits the inelastic excitations on both sides of the quasielastic central peak. The inelastic excitations disperse with increasing the momentum transfer, suggesting the longitudinal acoustic mode. We found a low energy excitation in addition to the longitudinal acoustic excitation in the dynamic structure factor and it reminds us a strong relationship with a rattling motion of a guest (Ba) atom in the solid state. The temperature dependence of the pair distribution function and the longitudinal acoustic excitation energy is very weak in a range from 600 to 900 °C. The result suggests that Ba and other atoms in the melt are located around minimum positions of the effective pair potential approximated as a harmonic one.
- Published
- 2018
146. Plasmons in Liquid Rb at Elevated Temperatures Studied by Inelastic X-ray Scattering
- Author
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Yukio Kajihara, Nozomu Hiraoka, Hiroyuki Hayashi, Kazuhiro Matsuda, Toru Hagiya, Koji Kimura, and Masanori Inui
- Subjects
Materials science ,Scattering ,X-ray ,Physics::Optics ,General Physics and Astronomy ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Line width ,Molecular physics ,0103 physical sciences ,Physics::Atomic and Molecular Clusters ,010306 general physics ,0210 nano-technology ,Plasmon - Abstract
Inelastic X-ray scattering measurements have been carried out to investigate the energy and line width of plasmons in liquid Rb at elevated temperatures (300 and 500 °C). The plasmon energy decreas...
- Published
- 2018
147. Attractants for Rice Leaf Bug, Trigonotylus caelestialium (Kirkaldy), are Emitted from Flowering Rice Panicles
- Author
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Tatsuya Fujii, Kazuhiro Matsuda, and Masatoshi Hori
- Subjects
Male ,Flowers ,Biochemistry ,Pheromones ,Heteroptera ,Botany ,Animals ,Poaceae ,Solid Phase Microextraction ,Ecology, Evolution, Behavior and Systematics ,Panicle ,Polycyclic Sesquiterpenes ,Oryza sativa ,Behavior, Animal ,biology ,fungi ,Green leaf volatiles ,food and beverages ,Oryza ,General Medicine ,biology.organism_classification ,Miridae ,Olfactometer ,Female ,PEST analysis ,Volatilization ,Sesquiterpenes - Abstract
Volatiles were extracted from rice plants of various growth stages with solid-phase microextraction (SPME) and analyzed by gas chromatography-mass spectrometry (GC-MS) to identify attractants that cause invasion of the rice leaf bug Trigonotylus caelestialium (Kirkaldy) into paddy fields. The composition of volatile blends produced by rice plants changed with rice development. In addition, volatile blend compositions differed between the panicles and the stems and leaves. The relative geranyl acetone content was high in all plant structures analyzed. In volatiles from whole plants in the fourth-leaf stage and panicles in the full-ripe stage, the relative content of green leaf volatiles (GLVs) was higher than that found in other rice plant structures. In contrast, relative terpene levels emitted from whole plants in the panicle-formation stage and by panicles and stems and leaves in the flowering stage were higher than those of other rice plant structures. However, the type of terpenes found differed between the panicles and the stems and leaves. Relative levels of β-caryophyllene in whole plants in the panicle-formation stage and panicles in the flowering stage were much higher than that in stems and leaves in the flowering stage. Our previous studies demonstrated that the odor from whole plants in the panicle-formation stage and panicles in the flowering stage is attractive to rice leaf bugs. Here, the attractiveness of β-caryophyllene to adult bugs was investigated in olfactometer assays. Adult females were attracted to β-caryophyllene at a concentration of 0.001%, which is approximately equivalent to the concentration produced by flowering rice panicles. However, β-caryophyllene also was present in the odor of whole plants in the fourth-leaf stage and in stems and leaves in the flowering stage. Furthermore, the amounts of this compound emitted from these structures were similar. Therefore, we suggest that the relative abundance of this compound in a volatile blend is important for attractance of the bugs.
- Published
- 2010
148. Viscoelastic anomaly accompanying anti-crossing behaviour in liquid As2Se3
- Author
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Mingfa Yao, Daisuke Ishikawa, Kozaburo Tamura, Yukio Kajihara, Shinya Hosokawa, Satoshi Tsutsui, Fuyuki Shimojo, Kazuhiro Matsuda, Yoshimi Tsuchiya, Alfred Q. R. Baron, Koji Kimura, and Masanori Inui
- Subjects
Diffraction ,Physics ,Condensed matter physics ,Scattering ,Dynamic structure factor ,Context (language use) ,02 engineering and technology ,Reverse Monte Carlo ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Momentum ,0103 physical sciences ,Atom ,General Materials Science ,Anomaly (physics) ,010306 general physics ,0210 nano-technology - Abstract
We investigate the dynamic structure factor of the melt of the well known glass former, As2Se3, using inelastic x-ray scattering for temperatures, T, [Formula: see text] K and momentum transfers Q from [Formula: see text] nm-1. An anomaly was observed at Q = 2.7 nm-1 ([Formula: see text] K) with, in the context of a simple model, both an abrupt change in frequency and an increased linewidth reminiscent of an anti-crossing in a solid. Comparison with structural information from reverse Monte Carlo modeling of x-ray diffraction data allows us to associate the disappearance of the anomaly at higher temperatures with a drop in the number of mechanical constraints per atom, n mc, to [Formula: see text] reminiscent of the threshold applicable for glass formation in rigidity theory. It is inferred that the surprising jump in the dispersion in the liquid may be correlated with a stiffness transition in a network glass.
- Published
- 2018
149. Influence of host plant odours on invasion of the rice leaf bugTrigonotylus caelestialiuminto paddy fields
- Author
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Tatsuya Fujii, Masatoshi Hori, and Kazuhiro Matsuda
- Subjects
Oryza sativa ,biology ,ved/biology ,ved/biology.organism_classification_rank.species ,Eleusine indica ,Forestry ,biology.organism_classification ,Miridae ,Agronomy ,Inflorescence ,Digitaria ciliaris ,Alopecurus aequalis ,Insect Science ,Poa annua ,Weed ,Agronomy and Crop Science - Abstract
1 The host-odour preferences of the rice leaf bug Trigonotylus caelestialium between the rice plant Oryza sativa L. and four species of graminaceous weeds, Poa annua, Alopecurus aequalis, Digitaria ciliaris and Eleusine indica, were investigated with an olfactometer aiming to clarify the influence of these odours on invasion of the bug to paddy fields at the flowering stage of rice. 2 Both female and male adults significantly preferred the graminaceous weed A. aequalis in the flowering stage to rice in the fifth-leaf stage. The bugs also significantly preferred flowering P. annua and A. aequalis to rice in the panicle-formation stage. However, the bugs showed no preferences between rice in the flowering and grain-filling stages and the flowering graminaceous weeds P. annua, D. ciliaris and E. indica. 3 The preference of the rice leaf bug for the flowering graminaceous weeds before rice flowering coincides with the fact that these bugs mainly live on these weeds before rice flowering. It is considered that the bug's similar preference for flowering rice panicles as the flowering graminaceous weeds causes the intense invasion of the bug into paddy fields at this rice developmental stage.
- Published
- 2010
150. X-ray Compton Scattering Study of Liquid Germanium and Tin
- Author
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Koji Kimura, Yoshiharu Sakurai, Kazuhiro Matsuda, Yukio Kajihara, Masanori Inui, Masayoshi Itou, Kouichi Hayashi, Jumpei Nakamura, Toru Hagiya, Ayano Chiba, and Takena Nagao
- Subjects
Phase transition ,Materials science ,X-ray ,Compton scattering ,General Physics and Astronomy ,chemistry.chemical_element ,Germanium ,02 engineering and technology ,Electron ,021001 nanoscience & nanotechnology ,01 natural sciences ,Molecular physics ,Condensed Matter::Soft Condensed Matter ,Metal ,chemistry ,visual_art ,0103 physical sciences ,visual_art.visual_art_medium ,010306 general physics ,0210 nano-technology ,Tin ,Fermi gas - Abstract
X-ray Compton scattering measurements have been carried out on germanium (Ge) and tin (Sn) in the solid and liquid states. While the shape of the Compton profiles (CPs) of Ge reflects the semiconductor-to-metal transition upon melting, it was found that even for Sn, which remains metallic during the solid–liquid phase transition, the shape of the CP in the liquid state exhibits more metallic characteristics than that in the solid state. The experimentally derived Fermi momenta of liquid Ge and Sn have systematically higher values than those of the electron gas at corresponding electron densities, which indicates a non-simple metallic nature of the group IV elements in the liquid state.
- Published
- 2017
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