Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Koji FUKUDOME"'
Publikováno v:
Aerospace, Vol 11, Iss 1, p 2 (2023)
Ice crystal icing occurs in jet engine compressors, which can severely degrade jet engine performance. In this study, we developed an ice crystal trajectory simulation, considering the state changes of ice crystals with a forced convection model, ind
Externí odkaz:
https://doaj.org/article/71dbb4ae0dbb496eb1839322e37c63a7
Autor:
Kazuya Yuzawa, Toshihiro Ishibashi, Hiroyuki Takao, Soichiro Fujimura, Shota Sunami, Tomoki Kasai, Hayato Uchikawa, Koji Fukudome, Makoto Yamamoto, Yuichi Murayama
Publikováno v:
Stroke: Vascular and Interventional Neurology, Vol 3, Iss S1 (2023)
Introduction The selection of the size of a braided stent, such as the flow diverter stent, currently depends on the surgeon’s experience. However, the suitable selection is difficult even for experienced surgeons due to shortening during the deplo
Externí odkaz:
https://doaj.org/article/9cb1cead61474067ada64fa1a8de313d
Autor:
Shota Sunami, Hiroyuki Takao, Soichiro Fujimura, Genki Kudo, Tomoki Kasai, Kazuya Yuzawa, Hayato Uchikawa, Toshihiro Ishibashi, Koji Fukudome, Makoto Yamamoto, Yuichi Murayama
Publikováno v:
Stroke: Vascular and Interventional Neurology, Vol 3, Iss S1 (2023)
Introduction Hemodynamic, morphological, and clinical factors have been reported to be involved in aneurysm rupture. Hemodynamic factors could be calculated by computational fluid dynamics (CFD) analysis. In addition, machine learning has been used i
Externí odkaz:
https://doaj.org/article/41444355a0fa47d1ac334d1dcb8e44d7
Autor:
Hayato Uchikawa, Hiroyuki Takao, Soichiro Fujimura, Tomoki Kasai, Shota Sunami, Kazuya Yuzawa, Toshihiro Ishibashi, Koji Fukudome, Makoto Yamamoto, Yuichi Murayama
Publikováno v:
Stroke: Vascular and Interventional Neurology, Vol 3, Iss S1 (2023)
Introduction Although low volume embolization ratio is known as risk factor of aneurysmal recanalization, stable occlusion can be achieved in limited cases. Evaluation of hemodynamic parameters at the neck surface has usually been performed with a fl
Externí odkaz:
https://doaj.org/article/4df42a8e2a454727a587d0a2242ca8e8
Autor:
Tomoki Kasai, Hirokazu Koseki, Hiroyuki Takao, Soichiro Fujimura, Naoki Kato, Issei Kan, Shota Sunami, Kazuya Yuzawa, Hayato Uchikawa, Toshihiro Ishibashi, Koji Fukudome, Makoto Yamamoto, Yuichi Murayama
Publikováno v:
Stroke: Vascular and Interventional Neurology, Vol 3, Iss S1 (2023)
Introduction Hemodynamics has been reported to be involved in the pathophysiology of the initiation of intracranial aneurysms. Computational fluid dynamics (CFD) simulation has been widely used to investigate what kind of hemodynamics is related to i
Externí odkaz:
https://doaj.org/article/83f743fb7b6e449c9c85a7de2b17ced6
Autor:
Kazunori Masuda, Shota Kakizaki, Gota Nagayama, Naoki Kato, Hiroyuki Takao, Soichiro Fujimura, Shota Sunami, Tomoki Kasai, Kazuya Yuzawa, Hayato Uchikawa, Toshihiro Ishibashi, Koji Fukudome, Makoto Yamamoto, Yuichi Murayama
Publikováno v:
Stroke: Vascular and Interventional Neurology, Vol 3, Iss S1 (2023)
Introduction Although thin‐walled regions (TWRs) in an intracranial aneurysm have a risk of rupture due to contact with surgical instruments, imaging modalities cannot accurately evaluate the thickness of aneurysm walls. The surgical operation will
Externí odkaz:
https://doaj.org/article/b812928333b54a4a90aeb0fcc1a95cb3
Autor:
Shunsuke Masuda, Soichiro Fujimura, Hiroyuki Takao, Kohei Takeshita, Takashi Suzuki, Yuya Uchiyama, Kostadin Karagiozov, Toshihiro Ishibashi, Koji Fukudome, Makoto Yamamoto, Yuichi Murayama
Publikováno v:
PLoS ONE, Vol 17, Iss 6, p e0269675 (2022)
BackgroundIntracranial stents are used to treat aneurysms by diverting the blood flow from entering into the aneurysmal dome. Although delayed rupture is rare, clinical outcomes are extremely poor in such cases. Hemodynamics after stent deployment ma
Externí odkaz:
https://doaj.org/article/a1b14ef8f7e54a8787a1ed0dc7f2fb25
Publikováno v:
Journal of Thermal Science and Technology, Vol 16, Iss 1, Pp JTST0003-JTST0003 (2021)
Direct numerical simulations of turbulent Taylor-Couette flows are performed to investigate the effect of a traveling wave control on torque and heat transfer. In the Taylor-Couette flow, inner and outer cylinders are rotating and immobile, respectiv
Externí odkaz:
https://doaj.org/article/e2091ac308c543c68059ebd2aeef4b1e
Publikováno v:
Aerospace, Vol 8, Iss 10, p 294 (2021)
Heating devices on airfoil surfaces are widely used as an anti-icing technology. This study investigated the aerodynamic performance with a static heating surface based on the modified extended Messinger model. The predicted ice shape was validated t
Externí odkaz:
https://doaj.org/article/2c69465899614c8b8eab6be3fbe7afa6
Autor:
Yuya Uchiyama, Soichiro Fujimura, Hiroyuki Takao, Takashi Suzuki, Motoharu Hayakawa, Toshihiro Ishibashi, Kostadin Karagiozov, Koji Fukudome, Yuichi Murayama, Makoto Yamamoto
Publikováno v:
Bioengineering, Vol 8, Iss 10, p 143 (2021)
Flow diverters (FDs) are widely employed as endovascular treatment devices for large or wide-neck cerebral aneurysms. Occasionally, overlapped FDs are deployed to enhance the flow diversion effect. In this study, we investigated the hemodynamics of o
Externí odkaz:
https://doaj.org/article/10026fedf79e451094ab02bee72449f8