Zobrazeno 1 - 10
of 449
pro vyhledávání: '"Kazunori, Takahashi"'
Autor:
Tadahiro Kobayashi, Satoko Saito, Masayuki Takada, Kento Sakaguchi, Kazunori Takahashi, Ken Tanaka, Kaneyuki Kawamae, Masaki Nakane
Publikováno v:
Case Reports in Acute Medicine, Vol 6, Iss 1, Pp 13-18 (2023)
Apixaban is a direct oral anticoagulation agent that exerts its effect through the direct inhibition of factor Xa. We treated a case of massive intoxication with 70 tablets of apixaban and have presented the clinical course of the associated anti-Xa
Externí odkaz:
https://doaj.org/article/7ea2916d40274f09acb2fec3e0498772
Effect of a permanent-magnet-induced cusp field on a magnetic nozzle radio frequency plasma thruster
Autor:
Yugo Nakahama, Kazunori Takahashi
Publikováno v:
AIP Advances, Vol 14, Iss 1, Pp 015059-015059-8 (2024)
A cusp magnetic field is formed upstream of a radio frequency antenna by using a permanent magnet (PM) array in a radio frequency plasma source attached to a diffusion chamber, while an expanding magnetic field configuration downstream of the source
Externí odkaz:
https://doaj.org/article/729a540db43c443fbda0922e792bd41a
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)
Abstract Plasma flows in divergent magnetic fields resembling a magnetic nozzle can be found over wide scales ranging from astrophysical objects to terrestrial plasma devices. Plasma detachment from a magnetic nozzle is a frequent occurrence in natur
Externí odkaz:
https://doaj.org/article/9d047f0d01324a869cdf32fecc596788
Autor:
Kazunori Takahashi
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-13 (2022)
Abstract Innovations for terrestrial transportation technologies, e.g., cars, aircraft, and so on, have driven historical industries so far, and a similar breakthrough is now occurring in space owing to the successful development of electric propulsi
Externí odkaz:
https://doaj.org/article/eb3ff21db6414bc9a994c1fdcf22900f
Publikováno v:
AIP Advances, Vol 13, Iss 8, Pp 085324-085324-8 (2023)
Two operational rf driving frequencies of 2 and 13.56 MHz are employed in a 14-cm-diameter radio frequency (rf) plasma source under an expanding magnetic field. The changes in the radial profiles of the ion saturation current and the electron tempera
Externí odkaz:
https://doaj.org/article/4d3fb7450f884ae6a7a79cfde330a406
Publikováno v:
Physical Review Research, Vol 5, Iss 2, p L022029 (2023)
Measurement of an internal azimuthal plasma current in a collisionless low β plasma expanding in a magnetic nozzle is presented. The electric field is removed from the plasma ensuring a negligible electron E×B drift resulting in a purely diamagneti
Externí odkaz:
https://doaj.org/article/0000dcb51e8740b895c294a4da2dac58
Autor:
Kento Sakaguchi, Masayuki Takada, Kazunori Takahashi, Yu Onodera, Tadahiro Kobayashi, Kaneyuki Kawamae, Masaki Nakane
Publikováno v:
BMC Emergency Medicine, Vol 22, Iss 1, Pp 1-8 (2022)
Abstract Background It is difficult to predict the return of spontaneous circulation (ROSC) during cardiopulmonary resuscitation (CPR). Cerebral tissue oxygen saturation during CPR, as measured by near-infrared spectroscopy (NIRS), is anticipated to
Externí odkaz:
https://doaj.org/article/99d4c4912b014fd095437859d08ee5d6
Autor:
Thanatith Nakul, Kazunori Takahashi
Publikováno v:
AIP Advances, Vol 12, Iss 9, Pp 095118-095118-7 (2022)
A radio frequency (rf) plasma source is operated at 2 MHz under an expanding magnetic field. The source consists of a 14-cm-diameter and 25-cm-long source tube wound by a seven-turn rf loop antenna powered via an impedance matching circuit. The effic
Externí odkaz:
https://doaj.org/article/94a3f257425f4f46a0bdb6f7fa685fac
Autor:
Kazunori Takahashi
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract Development of a magnetic nozzle radiofrequency (rf) plasma thruster has been one of challenging topics in space electric propulsion technologies. The thruster typically consists of an rf plasma source and a magnetic nozzle, where the plasma
Externí odkaz:
https://doaj.org/article/c2d6cc35c9ca4dec88f26f36097f93bb
Publikováno v:
Frontiers in Physics, Vol 9 (2021)
Energy losses in a magnetic nozzle radiofrequency plasma thruster are investigated to improve the thruster efficiency and are calculated from particle energy losses in fully kinetic simulations. The simulations calculate particle energy fluxes with a
Externí odkaz:
https://doaj.org/article/754a44af664f47e0bb01d34798499da2