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Flow Visualization of Flowfield Structures around an Aerospike Nozzle using LIF and PSP
Tomohide NIIMI,Hideo MORI,Mashio TANIGUCHI 한국가시화정보학회 2004 KOREA-JAPAN Joint Seminar on Particle Image Veloci Vol.- No.-
Aerospike nozzles have been expected to be used for an engine of a reusable space shuttle to respond to growing demand for rocket-launching and its cost reduction. In this study, the flow field structures in any cross sections around clustered linear aerospike nozzles are visualized and analyzed, using laser induced fluorescence (LIF) of nitrogen monoxide seeded in the carrier gas of nitrogen. Since flow field structures are affected mainly by pressure ratio, the clustered linear aerospike nozzle is set inside a vacuum chamber to carry out the experiments in the wide range of pressure ratios from 75 to 200. Flow fields are visualized in several cross-sections, demonstrating the complicated three-dimensional flow field structures. Pressure sensitive paint (PSP) ofPtTFPP bound by poly-IBM-co-TFEM is also applied to measurement of the complicated pressure distribution on the spike surface, and to verification of contribution of a truncation plane to the thrust. Finally, to examine the effect of the sidewalls attached to the aerospike nozzle, the flow fields around the nozzle with the sidewalls are compared with those without sidewalls.
Tomohide Sanda,Manami Yoshimura,Kanae Hyodo,Hiromitu Ishii,Tsutomu Yamashita 대한심장학회 2020 Korean Circulation Journal Vol.50 No.9
Background and Objectives: Atherosclerosis is characterized by a hypercoagulable state, during which coagulation and fibrinolytic factors are activated simultaneously. However, details regarding the thrombolytic pathway in this context remain unknown. Here we investigated how direct long-term inhibition of thrombin influenced spontaneous thrombolytic activity during atherosclerotic progression in apolipoprotein E (ApoE)–/––low density lipoprotein receptor (LDLR)–/– double-knockout mice. Methods: All mice received either standard chow (placebo group) or dabigatran-containing chow for 22 weeks, after which we evaluated them. The amount of atherosclerosis was estimated as the ratio of the atherosclerotic area to the total aortic intimal area. In addition, we used immunohistochemistry to analyze the expression of tissue plasminogen activator (t-PA), plasminogen activator inhibitor-1 (PAI-1), thrombin activatable fibrinolysis inhibitor (TAFI), and endothelial nitric oxide synthase (eNOS) in atherosclerotic regions. To evaluate thrombolysis, we used a He–Ne laser to induce thrombosis in vessels of the cremaster muscle and then measured the thrombus volume over time. Results: The atherosclerotic area was smaller and thrombolytic activity greater in the dabigatran-treated group than in the placebo group. Furthermore, according to the thrombolysis model, spontaneous thrombolytic activity was increased in the dabigatran-treated mice compared with the placebo mice. In support of these results, immunohistochemistry demonstrated decreased expression of PAI-1 and TAFI but increased expression of eNOS in the dabigatran group compared with the placebo group. However, t-PA expression did not differ between groups. Conclusions: Direct long-term inhibition by dabigatran etexilate of thrombin led to an increase in spontaneous thrombolytic activity decreasing the expression of PAI-1 and TAFI.
Tomohide Yasunaga 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.2
The nasocorine plant bug genus Campylomma Reuter from Indochina is reviewed. Nine species are currently recognized, including a new species very recently discovered from Krabi and Phang Nga, S. Thailand, C. seunghwani, which is described and figured, with discussion on its peculiar habitat preference on Macaranga tree. A key to all species reported from Indochina is provided; this key now enables workers to unequivocally distinguish both sexes of several taxonomically confused members.An annotated checklist including host and distribution records is also presented.
Area inside the Established Threshold (AET)
Tomohide Tsukasaki 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
1. Area inside the Established Threshold(AET) is an index to evaluate coils or devices. 2. Advantages of TS2400 -1. High speed (2,000 points / hour) -2. Low magnetic metal flames -3. Movement Resolution (1 mm) 3. Advantage of PW6001 - Current phase shift correction