Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Kohei Hata"'
Publikováno v:
IEEE Access, Vol 11, Pp 15816-15830 (2023)
In this paper, multiple reconfigurable intelligent surface (RIS) boards are deployed to enhance millimeter wave (mmWave) communication in a harsh blockage environment, where mmWave line-of-sight (LoS) link is completely blocked. Herein, RIS-user asso
Externí odkaz:
https://doaj.org/article/abf961131c634e739bc839dd86d94058
Publikováno v:
Tetrahedron Letters. 60:151261
A convergent synthesis of the ABCD fragment of gymnocin-B was accomplished. The tetracyclic ether ring system was synthesized by the construction of the BC ring system via the oxiranyl anion alkylation and ring expansion reaction, followed by the for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::500316a4ca40f7db55c6093372d39a74
https://doi.org/10.1016/j.tetlet.2019.151261
https://doi.org/10.1016/j.tetlet.2019.151261
Autor:
Ehab Mahmoud Mohamed, Sherief Hashima, Nasreen Anjum, Kohei Hatano, Walid El Shafai, Basem M. Elhalawany
Publikováno v:
IET Communications, Vol 16, Iss 18, Pp 2200-2207 (2022)
Abstract Millimetre wave (mmWave) communications, that is, 30 to 300 GHz, have intermittent short‐range transmissions, so the use of reconfigurable intelligent surface (RIS) seems to be a promising solution to extend its coverage. However, optimizi
Externí odkaz:
https://doaj.org/article/fa2ea286d97445df82e6fafa91665e91
Autor:
Kohei Hata, Keishi Hasebe, Takeshi Nakagawa, Bungo Otsuki, Ichiro Nakayama, Yuzo Oda, Kouji Goto
Publikováno v:
Orthopedics & Traumatology. 51:96-99
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cee90ab328fcf16604164993f22851b4
https://doi.org/10.5035/nishiseisai.51.96
https://doi.org/10.5035/nishiseisai.51.96
Publikováno v:
Orthopedics & Traumatology. 51:614-617
Total ankle arthroplasty (TAA) with V-shaped ankle was performed for rheumatoid arthritis and osteoarthritis in our hospital. Between August 1994 and March 2001, TAA was performed on 15 ankles of 11 patients. The mean age of the patients (one male an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c83b9a7e9ac23e4896c4e0c59aed653
https://doi.org/10.5035/nishiseisai.51.614
https://doi.org/10.5035/nishiseisai.51.614
Autor:
Bungo Ohtsuki, Ichiro Nakayama, Takeshi Nakagawa, Koji Goto, Keishi Hasebe, Kohei Hata, Yuzo Oda, Jun Kawai
Publikováno v:
Orthopedics & Traumatology. 51:68-71
Endovis nail is an instrument for the trochanteric fracture of the femur. It has a slit end and two lag screws for insertion into the femoral head, a large one for distal and small for proximal. Twenty-five cases were treated with this instrument bet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::000b3bc7e8d738e2b0f28bd1a46578e2
https://doi.org/10.5035/nishiseisai.51.68
https://doi.org/10.5035/nishiseisai.51.68
Publikováno v:
IEEE Access, Vol 10, Pp 81642-81653 (2022)
Recently, reconfigurable intelligent surface (RIS) relaying is suggested as a talented technology for extending the millimeter wave (mmWave) coverage. However, finding out the best RIS relay to maximize the achievable data rate is a too time-consumin
Externí odkaz:
https://doaj.org/article/cdd87b4d3d9e43c2b8ab85d691b37569
Autor:
Amira O. Hashesh, Sherief Hashima, Rokaia M. Zaki, Mostafa M. Fouda, Kohei Hatano, Adly S. Tag Eldien
Publikováno v:
IEEE Access, Vol 10, Pp 92048-92066 (2022)
Recently, unmanned aerial vehicles (UAVs) communications gained significant concentration as a talented technology for future wireless communications using its remarkable advantages and broad applicability. Furthermore, UAV networks’ high complex c
Externí odkaz:
https://doaj.org/article/2de429bfe3f74b889a56cdc7743a0263
Publikováno v:
Mathematics, Vol 10, Iss 7, p 1055 (2022)
We consider a variant of the online semi-definite programming problem (OSDP). Specifically, in our problem, the setting of the decision space is a set of positive semi-definite matrices constrained by two norms in parallel: the L∞ norm to the diago
Externí odkaz:
https://doaj.org/article/2e1dde17c27b468cb532ad3c00751c3b
Publikováno v:
Sensors, Vol 22, Iss 6, p 2179 (2022)
A reconfigurable intelligent surface (RIS) is a promising technology that can extend short-range millimeter wave (mmWave) communications coverage. However, phase shifts (PSs) of both mmWave transmitter (TX) and RIS antenna elements need to be optimal
Externí odkaz:
https://doaj.org/article/ef5cc5f35d0e4dc6879694307a5638d0