http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Efficient spectrum sharing with avoiding spatial fragmentation of white space
Takashi Kosugi,Takeo Fujii 한국통신학회 2015 ICT Express Vol.1 No.2
This letter proposes an efficient spectrum sharing by using a smart channel selection with considering the spatial shape of white space (WS) for cognitive radio systems. Here, we consider the environment in which secondary users (SUs) share the same spectrum with multiple channels. In such situation, the assignment channel avoiding spatial fragmentation is important because other SUs can easily access to remaining WS. In this paper, we utilize a perimeter to area ratio of WS for channel assignment as a criterion for evaluating value of remaining WS. We confirm the effectiveness of the proposed spectrum sharing method by using computer simulations.
Tsuji Osahiio,Kosugi Shizuko,Suzuki Satoshi,Nori Satoshi,Nagoshi Narihito,Okada Eijiro,Fujita Nobuyuki,Yagi Mitsuru,Nakamura Masaya,Matsumoto Morio,Watanabe Kota 대한척추외과학회 2021 Asian Spine Journal Vol.15 No.5
Study Design: This is a retrospective observational study with an outpatient setting. Purpose: This study aimed to describe the effects of duloxetine (DLX) administration for postsurgical chronic neuropathic disorders (both pain and numbness) following spinal surgery in patients without depression. Overview of Literature: Although several reports indicated the potential of DLX to effectively treat postoperative symptoms as a perioperative intervention, there have been no reports of its positive effect on postsurgical chronic neuropathic disorders. Methods: A total of 24 patients with postsurgical chronic pain and/or numbness Numeric Rating Scale (NRS) scores of ≥4 were enrolled. All patients underwent spine or spinal cord surgery at Keio University Hospital and received daily administration of DLX for more than 3 months. The mean postoperative period before the first administration of DLX was 35.5±57.0 months. DLX was administered for more than 3 months at a dose of 20, 40, or 60 mg/day, and the degree of pain and numbness was evaluated using the NRS before administration and 3 months after administration. Effectiveness was defined as more than a 2-point decrease in the NRS score following administration. Results: In terms of the type of symptoms, 15 patients experienced only numbness, eight experienced both pain and numbness, and one experienced only pain. Of the 24 patients, 19 achieved effective relief with DLX. DLX was effective for all patients with postsurgical chronic pain (n=9), and it reduced postsurgical chronic numbness in 18 of 23 patients. No significant difference was observed in background spinal disorders. DLX was not effective for five patients who complained only of postsurgical chronic numbness. Conclusions: This study reports the effectiveness of DLX for postsurgical chronic neuropathic disorders. Although DLX reduced postsurgical chronic pain (efficacy rate=100%) and numbness (78.3%) in certain patients, further investigation is needed to determine its optimal use.
Satoh, Shigeru,Kosugi, Yusuke,Iwazaki, Yujiro,Shibuya, Kenichi,Waki, Keisuke The Korean Society of Plant Biotechnology 2000 Plant molecular biology and biotechnology research Vol.2 No.2
Carnation petals exhibit autocatalytic ethylene production and wilting during senescence. The autocatalytic ethylene production is induced by the expression of 1-aminocyclopropane-1-carboxylate (ACC) synthase and ACC oxidase genes, whereas the wilting of petals is related to expression of the cysteine proteinase (CP) gene. Until recently, it has been believed that these two phenomena, autocatalytic ethylene production and wilting, are regulated in concert in senescing carnation petals, since the two phenomena occurred closely in parallel. Our studies with petals of a transgenic carnation harboring a sense ACC oxidase transgene and petals of carnation flowers treated with 1,1-dimethyl-4-(phenylsulfonyl) semicarbazide showed that the expression of ACC synthase and ACC oxidase genes and that of CP are regulated differently in carnation psanetals. Interestingly, in the petals of transgenic carnation, the transcript for CP was accumulated but the transcripts for ACC synthase and ACC oxidase were not accumulated in response to exogenous ethylene. Based on these results, we hypothesized that two ethylene signaling pathways, one leading to the expression of ACC synthase and ACC oxidase genes and the other leading to the expression of CP gene, are functioning in senescing carnation petals.
Dulal Chandra,Toshiyuki Matsui,Haruo Suzuki,Yusuke Kosugi,Koichi Fujimura 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.2
The changes in ammonia content as well as activity and gene expression of glutamate dehydrogenase (GDH; EC 1.4.1.2) were investigated in lettuce during storage. GDH amination activity increased with the increases in ammonia content in the outer leaf portion after 24 h of storage. GDH amination activity was substantially higher than deamination activity. The isolated partial cDNA clone referred to as LsGDH (Lactuca sativa glutamate dehydrogenase; AB334207) consisted of 757 nucleotides and was highly homologous with the GDH genes of other plants. Although the transcript of LsGDH was found in both the outer and inner leaves, the level of transcript gradually increased in the outer leaves with the progress of storage, but was only expressed in the inner leaves when higher enzyme activity was observed. Results suggest that GDH expression in lettuce is controlled by tissue specific manner and/or multiple levels of regulations. The changes in ammonia content as well as activity and gene expression of glutamate dehydrogenase (GDH; EC 1.4.1.2) were investigated in lettuce during storage. GDH amination activity increased with the increases in ammonia content in the outer leaf portion after 24 h of storage. GDH amination activity was substantially higher than deamination activity. The isolated partial cDNA clone referred to as LsGDH (Lactuca sativa glutamate dehydrogenase; AB334207) consisted of 757 nucleotides and was highly homologous with the GDH genes of other plants. Although the transcript of LsGDH was found in both the outer and inner leaves, the level of transcript gradually increased in the outer leaves with the progress of storage, but was only expressed in the inner leaves when higher enzyme activity was observed. Results suggest that GDH expression in lettuce is controlled by tissue specific manner and/or multiple levels of regulations.