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251 results on '"Ohno, Masashi"'

7. Effects of the chain length of nonaromatic epoxy resins on thermomechanical and optical properties: experiments, and ab initio and molecular dynamics simulations.

Author

Kawagoe, Yoshiaki, Kinugawa, Yuuki, Matsumoto, Keigo, Ohno, Masashi, Kishimoto, Naoki, Kawai, Takahiko, and Okabe, Tomonaga

Abstract

Epoxy resin has been extensively used in the field of advanced electronic materials as an adhesive and encapsulant owing to its excellent material properties. However, recently, there has been a demand for further improvement in heat resistance, high transparency, environmental resistance, and enhanced handling properties for high-brightness light-emitting diodes. Conventional aromatic epoxy resins lack light resistance; therefore, a colorless and transparent epoxy resin without aromatic rings is desirable. In this study, tris(2,3-epoxypropyl) isocyanurate (TEPIC) was used as a nonaromatic epoxy resin, and three types of TEPIC with different side-chain lengths were prepared. The ultraviolet (UV)-visible absorption properties of TEPIC were evaluated using time-dependent density functional theory, and the practicality of the numerical prediction of light resistance was verified. TEPIC yields a UV absorbance spectrum with a lower intensity than those of conventional aromatic epoxy resins, suggesting that TEPIC is expected to have high light resistance. In addition, their thermomechanical properties and the influence of molecular structure were evaluated using both molecular dynamics (MD) simulations and experiments. The MD simulation and experimental results were in good agreement, indicating that the long side chains of TEPIC suppress triaxial deformation-induced failure and improve ductility instead of decreasing strength and stiffness. In addition, the longer side chains form a dense molecular structure with less free volume. These results indicate that numerical approaches can be used to predict various properties of epoxy resins and interpret them from the molecular structure. Accordingly, these approaches can be used to aid the material development process. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Adherent-invasive E. coli – induced specific IgA limits pathobiont localization to the epithelial niche in the gut

Author

Tanaka, Rika, primary, Imai, Jin, additional, Tsugawa, Hitoshi, additional, Eap, Karl Bil, additional, Yazawa, Masaki, additional, Kaneko, Motoki, additional, Ohno, Masashi, additional, Sugihara, Kohei, additional, Kitamoto, Sho, additional, Nagao-Kitamoto, Hiroko, additional, Barnich, Nicolas, additional, Matsushima, Masashi, additional, Suzuki, Takayoshi, additional, Kagawa, Tatehiro, additional, Nishizaki, Yasuhiro, additional, Suzuki, Hidekazu, additional, Kamada, Nobuhiko, additional, and Hozumi, Katsuto, additional

Published
2023
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20. Palliative stenting for malignant colorectal stenosis in the elderly

Author

Ohno, Masashi, primary, Nishida, Atsushi, additional, Nishino, Kyohei, additional, Hirayama, Hisashi, additional, Takahashi, Kenichiro, additional, Morita, Yukihiro, additional, Kishi, Yuki, additional, Morita, Yasuhiro, additional, Bamba, Hiromichi, additional, Shiomi, Hisanori, additional, and Imaeda, Hirotsugu, additional

Published
2022
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28. Development of a transparent single-grid-type MSGC based on LCD technology

Author

Takahashi Hiroyuki, Miyoshi Hiroaki, Xuan Lian, Mitsuya Yuki, Shimazoe Kenji, Ohno Masashi, and Iimoto Takeshi

Subjects
Physics, QC1-999
Abstract

We are developing a multi-grid-type MSGC based on the liquid crystal display (LCD) technology, which enables a large area and fine structure. Single-grid-type MSGC using transparent electrodes has been fabricated and successfully operated in several different gas mixtures. The use of LCD technology allows us to integrate some simple electronics using thin film transistors. Such an integrated device is our next target. The successful operation of Single-grid-type MSGC is the very important first step for us.

Published
2018
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30. Altered gut microbiota in patients with small intestinal bacterial overgrowth.

Author

Bamba, Shigeki, Imai, Takayuki, Sasaki, Masaya, Ohno, Masashi, Yoshida, Shinya, Nishida, Atsushi, Takahashi, Kenichiro, Inatomi, Osamu, and Andoh, Akira

Subjects
SMALL intestinal bacterial overgrowth, GUT microbiome, LACTOSE intolerance, SHORT bowel syndrome
Abstract

Background and Aim: Small intestinal bacterial overgrowth (SIBO) is diagnosed by using quantitative culture of duodenal aspirates and/or a hydrogen breath test. However, few studies have analyzed bacterial microbiota in Japanese patients with SIBO. Methods: Twenty‐four patients with any abdominal symptoms and suspected SIBO were enrolled. Quantitative culture of duodenal aspirates and a glucose hydrogen breath test were performed on the same day. SIBO was diagnosed based on a bacterial count ≥ 103 CFU/mL or a rise in the hydrogen breath level of ≥ 20 ppm. The composition of the duodenal microbiota was analyzed by 16S rRNA gene sequencing. Results: Small intestinal bacterial overgrowth was diagnosed in 17 of the 24 patients (71%). The positive rates for the hydrogen breath test and quantitative culture of duodenal aspirates were 50% and 62%, respectively. Patients with SIBO showed significantly reduced α‐diversity compared with non‐SIBO patients, and analysis of β‐diversity revealed significantly different distributions between SIBO and non‐SIBO patients. In addition, the intestinal microbiome in SIBO patients was characterized by increased relative abundance of Streptococcus and decreased relative abundance of Bacteroides compared with non‐SIBO patients. Conclusions: Duodenal dysbiosis was identified in patients with SIBO and may play a role in the pathophysiology of SIBO. [ABSTRACT FROM AUTHOR]

Published
2023
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36. Chronic cystoisosporiasis in an immunocompetent adult

Author

Ohno, Masashi, primary, Inatomi, Osamu, additional, Imai, Takayuki, additional, Takahashi, Kenichiro, additional, Bamba, Shigeki, additional, Konishi, Keiji, additional, Sasaki, Masaya, additional, Kushima, Ryoji, additional, and Andoh, Akira, additional

Published
2021
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38. Low energy particle detector using a superconducting transition edge sensor

Author

Ohno, Masashi, Sato, Hiromi, Mishima, Kenji, Ikeda, Tokihiro, and Shimizu, Hirohiko M.

Subjects
X-ray spectroscopy -- Usage, Superconductive devices -- Design and construction, Business, Electronics, Electronics and electrical industries
Abstract

The development of TES array with a large detection area and a relatively high operation temperature for the precise measurement of the neutron beta decay optimized by the thickness of Au/Ti/Au trilayer and incorporated by Au bar is reported.

Published
2007

39. A new spiral MGSC

Author

Takahashi, Hiroyuki, Nishi, Kosuke, Paes, Sebastien, Niko, Hisako, Fujita, Kaoru, Siritiprussamee, Prasit, Ohno, Masashi, Shi, Boxuan, Nakazawa, Masaharu, Toyokawa, Hidenori, Kishimoto, Shunji, Ino, Takashi, and Furusaka, Michihiro

Published
2007
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40. The Comparison of Fecal Microbiota in Left-Side and Right-Side Human Colorectal Cancer

Author

Miyake, Toru, primary, Mori, Haruki, additional, Yasukawa, Daiki, additional, Hexun, Zhang, additional, Maehira, Hiromitsu, additional, Ueki, Tomoyuki, additional, Kojima, Masatsugu, additional, Kaida, Sachiko, additional, Iida, Hiroya, additional, Shimizu, Tomoharu, additional, Ohno, Masashi, additional, Andoh, Akira, additional, and Tani, Masaji, additional

Published
2021
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41. Characteristics of superconducting series array tunnel junctions for heavy ions

Author

Sato, Hiromi, Kurakado, Masahiko, Akiyama, Takahiro, Takizawa, Yoshiyuki, Morimoto, Kouji, Kaji, Daiya, Shiki, Shigetomo, Morita, Kosuke, Ohno, Masashi, and Shimizu, Hirohiko M.

Subjects
Superconductive devices -- Design and construction, Sensors -- Design and construction, Tunneling (Physics) -- Analysis, Business, Electronics, Electronics and electrical industries
Abstract

Series-junction detectors for the detection of high energy heavy ions were developed and an experimental study for evaluating energy resolution and linearity of the series-junction detector is presented. The result showed 4.2% in full-width at half-maximum (FWHM) of energy resolution at 191 MeV (super 40)Ar beams.

Published
2005

42. A new x-ray microcalorimeter based on a pixilated TES array

Author

Fukuda, Daiji, Ohno, Masashi, Takahashi, Hiroyuki, Kunieda, Yuichi, Inou, Tadashi, Ohkubo, Masataka, Ataka, Manabu, and Nakazawa, Masaharu

Subjects
Superconductive devices -- Research, Calorimeters -- Research, Edge detection (Image processing) -- Research, Business, Electronics, Electronics and electrical industries
Abstract

Development of a new x-ray microcalorimeter, based on superconducting transition edge sensors (TES), is described and discussed.

Published
2003

44. Assessment of Body Composition From CT Images at the Level of the Third Lumbar Vertebra in Inflammatory Bowel Disease

Author

Bamba, Shigeki, primary, Inatomi, Osamu, additional, Takahashi, Kenichiro, additional, Morita, Yasuhiro, additional, Imai, Takayuki, additional, Ohno, Masashi, additional, Kurihara, Mika, additional, Takebayashi, Katsushi, additional, Kojima, Masatsugu, additional, Iida, Hiroya, additional, Tani, Masaji, additional, and Sasaki, Masaya, additional

Published
2020
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49. Packet speech transmission on ATM networks using a variable rate embedded ADPCM coding scheme

Author

Kondo, Kazuhiro and Ohno, Masashi

Subjects
Voice synthesis -- Research, Vocoders -- Research
Abstract

We propose a packet speech coding scheme to vary the code bits of an embedded ADPCM coder between 6 bits per sample, for high prediction gain speech blocks, to 2 bits for blocks representing silence. Subjective quality of 3.2 MOS on a scale of 1 to 5 at an enhancement-bit loss rate of 30% was obtained in our tests.

Published
1994

50. Degradation of Quality Factor of Superconducting Resonators by Remaining Metallic Film and Improved Fabrication Process Using Caldera Planarization

Author

Irimatsugawa, Tomoya, primary, Yamamori, Hirotake, additional, Hirayama, Fuminori, additional, Nagasawa, Shuichi, additional, Fujii, Go, additional, Kohjiro, Satoshi, additional, Sato, Akira, additional, Fukuda, Daiji, additional, Hidaka, Mutsuo, additional, Sato, Yasushi, additional, Ohno, Masashi, additional, and Takahashi, Hiroyuki, additional

Published
2019
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