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A HAHN-BANACH EXTENSION THEOREM FOR ENTIRE FUNCTIONS OF NUCLEAR TYPE
Nishihara, Masaru Korean Mathematical Society 2004 대한수학회지 Vol.41 No.1
Let Ε and F be locally convex spaces over C. We assume that Ε is a nuclear space and F is a Banach space. Let f be a holomorphic mapping from Ε into F. Then we show that f is of uniformly bounded type if and only if, for an arbitrary locally convex space G containing Ε as a closed subspace, f can be extended to a holomorphic mapping from G into F.
Nishihara, Kazuharu,Okada, Hiraku,Yamazato, Takaya,Katayama, Masaaki 통신위성우주산업연구회 2003 Joint Conference on Satellite Communications Vol.2003 No.-
To increase the channel efficiency, most of the Low Earth-Orbital satellite (LEOs) systems use the multibeam antenna and reuse the available channels. But in such systems, a beam handover occurs very frequently and a dropping probability becomes very high compared with the one beam systems. In this paper, we propose the nondropping handover and channel allocation scheme in the above LEOs systems. In the proposed scheme, we allocate an extra idle channel for a new call. Because of the predictable change of channel reuse distances, each user can always use the same channel as before. Furthermore, we proposed some cost functions used by channel selection and channel reassignment. For comparison, we show the lower bound of blocking probability by maximal complete dependent set (MCDS). We confirm that the proposed channel selection scheme improves the system performance by computer simulation.
Shougo Nishihara,Takashi shiga,Jun Nishihiro 국립중앙과학관 2023 Journal of Asia-Pacific Biodiversity Vol.16 No.2
Aldrovanda vesiculosa L. is a globally endangered aquatic plant, with only two reintroduced populations known in Japan. In October 2022, we found a population of this species with nearly 10,000 individuals in an agricultural pond in Ishikawa Prefecture. This paper describes the estimated population size, habitat conditions, and the results of a genetic comparison with other populations by comparing its nrDNA (internal transcribed spacer) and cpDNA (trnL intron and trnLetrnF spacer) sequences. All the DNA sequences from voucher specimens and GenBank data, including the population discovered in the present study, were identical. Based on the evidence, we presume that this A. vesiculosa population is a wild one.