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942 results on '"Kotani H"'

1. Spin-density-wave transition of (TMTSF)$_2$PF$_6$ at high magnetic fields

Author

Matsunaga, N., Yamashita, K., Kotani, H., Nomura, K., Sasaki, T., Hanajiri, T., Yamada, J., Nakatsuji, S., and Anzai, H.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science
Abstract

The transverse magnetoresistance of the Bechgaard salt (TMTSF)$_2$PF$_6$ has been measured for various pressures, with the field up to 24 T parallel to the lowest conductivity direction c$^{\ast}$. A quadratic behavior is observed in the magnetic field dependence of the spin-density-wave (SDW) transition temperature $T_{\rm {SDW}}$. With increasing pressure, $T_{\rm {SDW}}$ decreases and the coefficient of the quadratic term increases. These results are consistent with the prediction of the mean-field theory based on the nesting of the quasi one-dimensional Fermi surface. Using a mean field theory, $T_{\rm {SDW}}$ for the perfect nesting case is estimated as about 16 K. This means that even at ambient pressure where $T_{\rm {SDW}}$ is 12 K, the SDW phase of (TMTSF)$_2$PF$_6$ is substantially suppressed by the two-dimensionality of the system., Comment: 11pages,6figures(EPS), accepted for publication in PRB

Published
2001
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4. 029 Significance of anti-transcobalamin receptor antibodies in cutaneous arteritis unveiled by proteome-wide autoantibody screening

Author

Matsuda, K.M., primary, Kotani, H., additional, Yamaguchi, K., additional, Okumura, T., additional, Fukuda, E., additional, Kono, M., additional, Hisamoto, T., additional, Fukayama, M., additional, Okamura, T., additional, Shoda, H., additional, Fujio, K., additional, Goshima, N., additional, Shinichi, S., additional, and Yoshizaki, A., additional

Published
2023
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6. P289 Retrospective study of pregnancy outcome after breast cancer

Author

Yoshimura, A., primary, Nakakami, A., additional, Komaki, R., additional, Isogai, A., additional, Endo, Y., additional, Ozaki, Y., additional, Nozawa, K., additional, Kataoka, A., additional, Kotani, H., additional, Hattori, M., additional, Sawaki, M., additional, and Iwata, H., additional

Published
2023
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13. Designing the building space of a shopping street to use as a disaster evacuation shelter during the COVID-19 pandemic: A case study in Kobe, Japan

Author

Yokomatsu, M., Park, H., Kotani, H., Ito, H., Yokomatsu, M., Park, H., Kotani, H., and Ito, H.

Abstract

This study considers the risk of a natural hazard-induced disaster occurring during a pandemic, such as the novel coronavirus (COVID-19) pandemic, and develops the idea of utilizing a shopping street with disaster-proof buildings as a temporary evacuation shelter by incorporating countermeasures against the spread of infectious diseases. Using a case study of a shopping street in Kobe, Japan, we estimate shelter capacity by considering the requirement of 6 m2 of space allotted for each person. The shelter can accommodate 1194 evacuees and provide them with food and drinks for one day, even in the worst case of lifeline disruption. This study proposes a method of designing shelter space, and demonstrates how non-homogeneous and noncontinuous spaces within shopping street buildings can be applied to prevent the spread of infection, through the classification of evacuee types and use of space and facilities designated for each type. The study further examines the liability issue of secondary infection at the shelter with reference to civic law and the roles of government in developing a distributed evacuation framework.

Published
2021

14. Knowledge sharing, heterophily, and social network dynamics

Author

Yokomatsu, M, Kotani, H, Yokomatsu, M, and Kotani, H

Abstract

This study formulates a model where (i) players are characterized by a knowledge set that changes endogenously by communication and (ii) some players have homophily preferences, while others have heterophily preferences. The study thus demonstrates that heterophilous players bridge different components and extend networks in an early stage and, subsequently, homophilous players take the role of a network hub that maintains network ties. It also illustrates the long-run knowledge distribution. Further, the model is embedded with new structural components that illustrate the strength of weak ties and the small-world phenomenon.

Published
2021

16. Potential of a shopping street to serve as a food distribution center and an evacuation shelter during disasters: Case study of Kobe, Japan

Author

Kotani, H., Yokomatsu, M., Ito, H., Kotani, H., Yokomatsu, M., and Ito, H.

Abstract

This study demonstrates the potential use of a shopping street with disaster-proof buildings as a temporary evacuation shelter for local residents at the time of a disaster. We propose a simple estimation method to calculate the number of people for which the retail shops and restaurants in the shopping street can potentially provide food and drink using their inventory. We also estimate the number of evacuees that can be accommodated in the vacant spaces of the buildings. Our proposed method is applied to a shopping street in Kobe, Japan. While 5,200 people in the local community are expected to evacuate at the time of an earthquake, our survey shows that, in the case of power, gas, and water outages, the total amount of available food and drink supplied by the local shops and restaurants would be approximately 1,200 and 1,700 person-days, respectively. In another case, in which alternative facilities provide electricity, gas, and water, the amount of available food increases to about 2,800 person-days. Moreover, the building can provide space for overnight stay for approximately 2,300 people. The results also suggest that, by building stockpiles of food and drink in the unoccupied spaces of the building, the capacity of accommodating the local evacuees will be further enhanced. Future directions for more accurate and widely applicable estimation methods are also discussed.

Published
2020

35. Highly reliable ReRAM for embedded memory and beyond applications

Author

Yoneda, S., primary, Ito, S., additional, Hayakawa, Y., additional, Wei, Z., additional, Muraoka, S., additional, Homma, K., additional, Yasuhara, R., additional, Kawashima, K., additional, Himeno, A., additional, Mochida, R., additional, Kotani, H., additional, Kouno, K., additional, Mikawa, T., additional, Gohou, Y., additional, and Kakiage, T., additional

Published
2018
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36. Abstract P4-13-12: Immediate one-stage implant-based breast reconstruction without an acellular dermal matrix in Japanese breast cancer patients

Author

Okumura, S, primary, Tatibana, S, additional, Narita, C, additional, Hyodo, I, additional, Sawaki, M, additional, Hattori, M, additional, Yoshimura, A, additional, Ishiguro, J, additional, Kotani, H, additional, Gondo, N, additional, Adati, Y, additional, Iwata, H, additional, and Kamei, Y, additional

Published
2018
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37. Abstract P2-12-13: Withdrawn

Author

Kotani, H, primary, Terada, M, additional, Mori, M, additional, Horisawa, N, additional, Sugino, K, additional, Iwase, M, additional, Oonishi, S, additional, Kataoka, A, additional, Adachi, Y, additional, Gondou, N, additional, Yoshimura, A, additional, Hattori, M, additional, Sawaki, M, additional, and Iwata, H, additional

Published
2018
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41. Development of a ceramic antifriction bearing

Author

Komeya, K. and Kotani, H.

Subjects
Bearings (Machinery) -- Product development, Bearings (Machinery) -- Quality management, Reliability (Engineering) -- Analysis, Sintering -- Usage, Engineering and manufacturing industries
Abstract

Byline: K. Komeya, H. Kotani A high quality rolling bearing of silicon nitride was developed by improving the reliability of materials and through numerous experiments on bearing applications. The high strength silicon nitride ceramics for the bearing were developed by the use of sintering additives of yttria and alumina and newly synthesized high α-phase silicon nitride powder of uniform particle size and shape. The developed silicon nitride bearing was evaluated by rolling fatigue test in comparison with various other ceramics and high-carbon chromium steel. The result showed that silicon nitride had the best quality. Moreover, the applicabilites for high-speed bearings, all-ceramic bearings and dry-lubrication bearings were clearly recognized.

Published
2010

47. Serum heat shock protein 27 levels in patients with systemic sclerosis: a possible biomarker of skin sclerosis.

Author

Matsuda, K.M., Yoshizaki, A., Kotani, H., Norimatsu, Y., Kuzumi, A., Fukayama, M., Fukasawa, T., Ebata, S., Yoshizaki‐Ogawa, A., Asano, Y., Oba, K., and Sato, S.

Subjects
HEAT shock proteins, SYSTEMIC scleroderma, SERUM, IRRITATION (Pathology), FIBROSIS, SKIN, BIOMARKERS
Abstract

Systemic sclerosis (SSc) is a connective tissue disease characterized by a triad of immunological abnormality, tissue fibrosis and vascular damage.1 Skin sclerosis is one of the most prominent manifestations of SSc, extension of which has been investigated as a surrogate marker that reflects organ involvements.2 Heat shock protein 27 (Hsp27), also known as heat shock protein B1, works as an intracellular molecular chaperone as well as an extracellular pro-inflammatory signalling molecule.3,4 In the skin, Hsp27 is constantly expressed mainly in the superficial layer of the epidermis and upregulated in response to environmental stress such as temperature change or chemical irritation.5,6 Previous studies have indicated that Hsp27 plays a protective role in inflammatory skin conditions and also takes part in tissue repair process.7,8 In atopic dermatitis, the amount of Hsp27 in the cornified layer was correlated with the local severity score.9 These insights suggest that Hsp27 is involved in the cutaneous response mechanism to inflammatory skin conditions, but its significance among SSc patients has not yet been elucidated. For the SSc subgroups, serum Hsp27 levels in dcSSc patients were significantly increased compared to healthy controls (13.72 [6.62-25.18] vs. 6.89 [4.17-8.67] ng/mL, I P i < 0.01 by Mann-Whitney's I U i -test), while there were no significant differences in the levels of serum Hsp27 between lcSSc and healthy controls ( I P i = 0.23 by Mann-Whitney's I U i -test). These results suggest that serum Hsp27 might be a promising biomarker that reflects the extension of skin sclerosis among SSc patients. [Extracted from the article]

Published
2021
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48. Successful Peripheral T-Lymphocyte–Directed Gene Transfer for a Patient With Severe Combined Immune Deficiency Caused by Adenosine Deaminase Deficiency

Author

Kotani H, Masafumi Yamada, Ichiro Kobayashi, Shuzo Matsumoto, McGarrity Gj, Makoto Ohtsu, Tadashi Ariga, Motohiko Okano, M. Onodera, Atsushi Tame, Hirofumi Furuta, Nobuaki Kawamura, Blaese Rm, and Yukio Sakiyama

Subjects
Male, Adenosine Deaminase, Recombinant Fusion Proteins, T-Lymphocytes, Genetic enhancement, Genetic Vectors, Immunology, Transfection, Transplantation, Autologous, Biochemistry, Viral vector, Adenosine deaminase, Immune system, Immunopathology, medicine, Humans, Hypersensitivity, Delayed, Lymphocyte Count, Cells, Cultured, Skin Tests, Immunity, Cellular, biology, business.industry, Genetic transfer, Immunoglobulins, Intravenous, Genetic Therapy, Cell Biology, Hematology, T lymphocyte, medicine.disease, Combined Modality Therapy, Adenosine deaminase deficiency, Hemagglutinins, Retroviridae, Child, Preschool, Immunoglobulin G, Antibody Formation, biology.protein, Severe Combined Immunodeficiency, business
Abstract

Ten patients with adenosine deaminase deficiency (ADA−) have been enrolled in gene therapy clinical trials since the first patient was treated in September 1990. We describe a Japanese ADA− severe combined immune deficiency (SCID) patient who has received periodic infusions of genetically modified autologous T lymphocytes transduced with the human ADA cDNA containing retroviral vector LASN. The percentage of peripheral blood lymphocytes carrying the transduced ADA gene has remained stable at 10% to 20% during the 12 months since the fourth infusion. ADA enzyme activity in the patient's circulating T cells, which was only marginally detected before gene transfer, increased to levels comparable to those of a heterozygous carrier individual and was associated with increased T-lymphocyte counts and improvement of the patient's immune function. The results obtained in this trial are in agreement with previously published observations and support the usefulness of T lymphocyte-directed gene transfer in the treatment of ADA−SCID.

Published
1998
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