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Effect of Axisymmetric Sonic Nozzle Geometry on Characteristics of Supersonic Air Jet

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Journal of Thermal Science 2004年第2期13卷 121-126页

作者： Shigeru MATSUO masanori TANAKA Yumiko OTOBE Hideo KASHIMURA Heuy-Dong KIM Toshiaki SETOGUCHI Department of Mechanical Engineering Saga University 1 Honjo-machi Saga-shi Saga 840-8502 Japan Department of Control and Information Systems Engineering Kitakyushu National College of Technology 5-20-1 Shii Kokuraminami-ku Kitakyushu-shi Fukuoka 802-0985 Japan School of Mechanical Engineering College of Natural Science Andong National University 388 Song-Cheon Dong Andong Kyung-Pook Korea

The effect of nozzle geometry on sonic line and characteristics of supersonic air jet was studied. Computational fluid dynamics was applied in this study. The axisymmetric nozzle geometries investigated were two different contour converging nozzles, two different conically converging sharp-edged nozzles and a sharp-edged orifice. The results show that the supersonic jet structure, sonic line and streamlines in supersonic jet are strongly influenced by the nozzle geometry, and the total pressure loss increases with the increase of Mach disk diameter. The present numerical simulation is an effective tool to evaluate compressible flows in supersonic air jet.

关键词： compressible flow supersonic jet non-equilibrium condensation simulation.

Sorption of biodegradation end products of nonylphenol polyethoxylates onto activated sludge

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Journal of Environmental Sciences 2004年第4期16卷 564-569页

作者： Nguyen Viet Hung Masafumi Tateda Michihiko Ike masanori Fujita Shinji Tsunoi Minoru Tanaka Department of Environmental Engineering Graduate School of EngineeringOsaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan Department of Environmental Systems Technology College of Technology Toyama Prefectural University 5180 Kurokawa Kosugi Imizu Toyama 939-0398 Japan Research Center for Environmental Preservation Osaka University 2-4 Yamada-oka Suita Osaka 565-0871 Japan

Nonylphenol(NP), nonylphenoxy acetic acid(NP1EC), nonylphenol monoethoxy acetic acid(NP2EC), nonylphenol monoethoxylate(NP1EO) and nonylphenol diethoxylate(NP2EO) are biodegradation end products(BEPs) of nonionic surfactant nonylphenolpolyethoxylates (NPnEO). In this research, sorption of these compounds onto model activated sludge was characterized. Sorption equilibrium experiments showed that NP, NP1EO and NP2EO reached equilibrium in about 12 h, while equilibrium of NP1EC and NP2EC were reached earlier, in about 4 h. In sorption isotherm experiments, obtained equilibrium data at 28℃ fitted well to Freundlich sorption model for all investigated compounds. For NP1EC, in addition to Freundlich, equilibrium data also fitted well to Langmuir model. Linear sorption model was also tried, and equilibrium data of all NP, NP1EO, NP2EO and NP2EC except NP1EC fitted well to this model. Calculated Freundlich coefficient(K F) and linear sorption coefficient(K D) showed that sorption capacity of the investigated compounds were in order NP>NP2EO>NP1EO>NP1EC≈NP2EC. For NP, NP1EO and NP2EO, high values of calculated K F and K D indicated an easy uptake of these compounds from aqueous phase onto activated sludge. Whereas, NP1EC and NP2EC with low values of K F and K D absorbed weakly to activated sludge and tended to preferably remain in aqueous phase.

关键词： activated sludge biodegradation end products endocrine disruptor nonylphenol polyethoxylates sorption

A Study of Under-expanded Moist Air Jet Impinging on a Flat Plate

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Journal of Thermal Science 2005年第4期14卷 334-340页

作者： Yumiko OTOBE Shigeru MATSUO masanori TANAKA Hideo KASHIMURA Heuy-Dong KIM Toshiaki SETOGUCHI Department of Control and Information Systems Engineering Kitakyushu National College of Technology5-20-1ShiiKokuraminami-kuKitakyushu-shiFukuoka 802-0985Japan Department of Mechanical Engineering Saga University1Honjo-machiSaga-shiSaga 840-8502Japan School of Mechanical Engineering College of Natural ScienceAndong National University388Song Cheon DongAndongKyung PookKorea

When a gas expands through a convergent nozzle in which the ratio of the ambient to the stagnation pressures is higher than that of the critical one, the issuing jet from the nozzle is under-expanded. If a flat plate is placed normal to the jet at a certain distance from the nozzle, a detached shock wave is formed at a region between the nozzle exit and the plate. In general, supersonic moist air jet technologies with non-equilibrium condensation are very often applied to industrial manufacturing processes. In spite of the importance in major characteristics of the supersonic moist air jets impinging to a solid body, its qualitative characteristics are not known satisfactorily. In the present study, the effect of the non-equilibrium condensation on the under-expanded air jet impinging on a vertical flat plate is investigated numerically in the case with non-equilibrium condensation, frequency of oscillation for the flow field becomes larger than that without the non-equilibrium condensation, and amplitudes of static pressure become small compared with those of dry air. Furthermore, the numerical results are compared with experimental ones.

关键词： compressible flow non-equilibrium condensation impinging jet simulation.

Non-mechanical beam scanner based on VCSEL integrated amplifier with resonant wavelength detuning design

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Chinese Optics Letters 2021年第12期19卷 39-44页

作者： Shanting Hu Xiaodong Gu masanori Nakahama Fumio Koyama Beijing University of Posts and Telecommunications Beijing 100876China Institute of Innovative Research(IIR) Tokyo Institute of Technology4259-R2-22 Nagatsuta-choMidori-kuYokohama 226-8503Japan Ambition Photonics Inc. Yokohama 226-8510Japan

We demonstrate the non-mechanical beam steering and amplifier operation of a vertical cavity surface emitting laser(VCSEL)integrated Bragg reflector waveguide amplifier with a cut-off wavelength detuning design,which enables unidirectional lateral coupling,continuous electrical beam steering,and diffraction-limited divergence *** present the modeling of the proposed structure for unidirectional coupling between a seed single-mode VCSEL and slow-light *** also present the detailed operating characteristics including the near-field and far-field patterns,light/current characteristics,and lasing *** experimental measurements exhibit a single-mode output of over 8 mW under CW operation,a continuous beam steering range of 16°,and beam divergence below 0.1°as an optical beam *** integrated amplifier length is as small as 0.9 mm,and thus we could expect much higher powers and higher resolution points by increasing the amplifier lengths.

关键词： VCSEL integrated amplifier unidirectional coupling optical beam scanner

Causal role of Helicobacter pylori infection and eradication therapy in gastric carcinogenesis

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World Journal of Gastroenterology 2006年第1期12卷 10-16页

作者： masanori Ito Shinji Tanaka Tomoari Kamada Ken Haruma Kazuaki Chayama Department of Medicine and Molecular Science Hiroshima UniversityHiroshimaJapan Department of Endoscopy Hiroshima University HospitalHiroshimaJapan Gastroenterology Unit Department of Internal MedicineKawasaki Medical SchoolKurashikiJapan

Many epidemiological reports indicate that Helicobacter pylori （H pylori） infection plays an important role in gastric carcinogenesis. Several genetic and epigenetic alterations contribute to the initiation, promotion, and progression of the cancer cells in a multi-step manner. H pylori is known to induce chronic inflammation in the gastric mucosa. Its products, including superoxides, participate in the DNA damage followed by initiation, and the inflammation-derived cytokines and growth factors contribute to the promotion of gastric carcinogenesis. By eradicating H pylori, gastric inflammation can be cured; the therapy diminishes the levels not only of inflammatory cell infiltration, but also atrophy/ intestinal metaplasia in part. A randomized controlled trial revealed that the eradication therapy diminished the gastric cancer prevalence in cases without precancerous conditions. In addition, recent epidemiological studies from Japanese groups demonstrated that the development of gastric cancer, especially of the intestinal type, was decreased by successful eradication therapy, although these were designed in a non- randomized manner. However, it should be mentioned that endoscopic detection is the only way to evaluate the degree of gastric carcinogenesis. We have reported that the endoscopic and histological morphologies could be modified by eradication therapy and it might contribute to the prevalence of gastric cancer development. Considering the biological nature of cancer cell proliferation, it is considered that a sufficiently long-term follow-up would be essential to discuss the anticancer effect of eradication therapy.

关键词： H pylori Eradication Gastritis Gastric neoplasm, Endoscopy

Construction of Design Guidelines for Optimal Automotive Frame Shape Based on Statistical Approach and Mechanical Analysis

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Computer Modeling in Engineering & Sciences 2021年第8期128卷 731-742页

作者： masanori Honda Chikara Kawamura Isamu Kizaki Yoichi Miyajima Akihiro Takezawa Mitsuru Kitamura Mazda Motor Corporation 3-1 ShinchiFuchu-choAki-gunHiroshima730-8670Japan Department of Applied Mechanics and Aerospace Engineering School of Fundamental Science and EngineeringWaseda University3-4-1 OkuboShinjuku-kuTokyo169-8555Japan Division of Advanced Science and Engineering Graduate School of Advanced Science and EngineeringHiroshima University1-4-1 KagamiyamaHigashihiroshimaHiroshima739-8527Japan

A body frame composed of thin sheet metal is a crucial structure that determines the safety performance of a *** a correct weight and high-performance automotive body is an emerging engineering *** improve the performance of the automotive frame,we attempt to reconstruct its design criteria based on statistical and mechanical *** first,a fundamental study on the frame strength is conducted and a cross-sectional shape optimization problem is developed for designing the cross-sectional shape of an automobile frame having a very high mass efficiency for *** optimization is carried out using the nonlinear finite element method and a meta-modeling-based genetic *** analysis of the obtained set of optimal results is performed to identify the dominant design variables by employing the smoothing spline analysis of variance,the principal component analysis,and the self-organizing map *** relationship between the cross-sectional shape and the objective function is also analyzed by hierarchical clustering.A design guideline is obtained from these statistical approach results.A comparison between the statistically obtained design guideline and the conventional one based on the designers’experience is performed based on mechanical interpretation of the optimal cross-sectional ***,a mechanically reasonable new general-purpose design guideline is proposed for the cross-sectional shape of the automotive frame.

关键词： Automotive structure shape optimization data mining statistical approach crash-performance

An antioxidant resveratrol significantly enhanced replication of hepatitis C virus

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World Journal of Gastroenterology 2010年第2期16卷 184-192页

作者： Mitsuyasu Nakamura masanori Ikeda Ryota Hokari Nobuyuki Kato Toshifumi Hibi Soichiro Miura Department of Internal Medicine 2 National Defense Medical Collage3-2 NamikiTokorozawaSaitama 3598513Japan Department of Internal Medicine School of MedicineKeio University35 ShinanomachiShinjuku-kuTokyo 1608582 Japan Department of Internal Medicine School of MedicineKeio University35 ShinanomachiShinjuku-kuTokyo 1608582 Japan Masanori Ikeda Department of Molecular Biology Okayama University Graduate School of Medicine and Dentistry2-5-1 Shikada-choOkayama 7008558Japan Department of Internal Medicine School of MedicineKeio University35 ShinanomachiShinjuku-kuTokyo 1608582 Japan Masanori Ikeda

AIM:To elucidate the effect of antioxidants,resveratrol (RVT)and astaxanthin(AXN),on hepatitis C virus(HCV) replication. METHODS:We investigated the effect of recent popular antioxidant supplements on replication of the HCV replicon system *** is a strong antioxidant and a kind of polyphenol that inhibits replication of various *** is also a strong *** replication of HCV RNA was assessed by the luciferase reporter *** additive effect of antioxidants on antiviral effects of interferon(IFN)and ribavirin(RBV) was ***:This is the first report to investigate the effect of RVT and AXN on HCV *** contrast to other reported viruses,RVT significantly enhanced HCV RNA *** E also enhanced HCV RNA replication as reported previously,although AXN didnot affect *** and RBV significantly reduced HCV RNA replication,but these effects were dose-dependently hampered and attenuated by the addition of *** didnot affect antiviral effects of IFN or RBV. CONCLUSION:These results suggested that RVT is not suitable as an antioxidant therapy for chronic hepatitis C.

关键词： Replicon system Luciferase assay Ribavirin Interferon Polyphenol Astaxanthin

Molecular Cloning and Functional Characterization of Porcine MyD88 Essential for TLR Signaling

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Cellular & Molecular Immunology 2007年第5期4卷 369-376页

作者： masanori Tohno Tomoyuki Shimazu Hisashi Aso Yasushi Kawai Tadao Saito Haruki Kitazawa Food Immunology Group Laboratory of Animal Products ChemistryGraduate School of Agricultural ScienceTohoku UniversityAobakuSendai 981-8555Japan Research Fellow of the Japan Society for the Promotion of Science Food Immunology Group Laboratory of Animal Products ChemistryGraduate School of Agricultural ScienceTohoku UniversityAobakuSendai 981-8555Japan Laboratory of Functional Morphology Graduate School of Agricultural ScienceTohoku UniversityAobakuSendai 981-8555Japan

We isolated cDNA encoding porcine MyD88 （poMyD88） from Peyer＇s patches （Pps） of GALT. The complete open reading frame （ORF） of poMyD88 contains 879 bp encoding a deduced 293 aa residues. The amino acid sequence of poMyD88 was characterized by N-terminal death, intermediate and C-terminal Toll/IL-1 receptor （TIR） domains. The putative poMyD88 protein shares a higher level of homology with its human （87.2% amino acid identity） than with its mouse （77.4% amino acid identity） counterpart. Overexpression of poMyD88 participated in the further enhanced activation of NF-w.B in human embryonic kidney （HEK） 293 cells expressing porcine TLR2 and porcine TLR4/MD-2, but not porcine RP105/MD-1 after stimulation with the corresponding ligands. The expression levels of MyD88 were highest in the spleen and mesenteric lymph nodes （MLNs）, and lower in digestive tissues of newborn swine. In adult swine, the expression levels in the digestive tissues were lower than those in MLNs and the spleen. These results suggest that an MyD88-dependent signaling pathway is present in newborn as well as in adult swine and that it is involved in the innate immune system of these animals.

关键词： MyD88 TLR2 TLR4/MD-2 RP105/MD-1 cDNA cloning swine

Leakage behavior and distortion of the hysteresis loop in ferroelectric thin films

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Science China(Technological Sciences) 1997年第2期40卷 126-134页

作者：郑立荣林成鲁许华平邹世昌 masanori Okuyama Shanghai Institute of Metallurgy Chinese Academy of Sciences Shanghai 200050 China Department of Electrical Engineering Faculty of Engineering SciencesOsaka UniversityOsaka 560Japan

Leakage behavior and distortion of the polarization hysteresis loop in ferroelectric thin films are analyzed by applying a totally depleted asymmetric back-to-back Schottky model, with the Pt/Pb(Zr, Ti)O3/Pt ( Pt/ PZT/Pt) sandwich structural thin film capacitor as an example. Some interesting phenomena resulting from the asymmetric interfaces, such as the leakage current level, the flat-band voltage, the disclosure of the hysteresis loop, and the change in the remanent polarization and coercive field, as well as the vertical drift of the polarization hysteresis loop, are discussed in detail. The calculated results are also verified with experiments.

关键词： ferroelectric thin film Schottky barrier leakage hysteresis loop.