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Current Status and Enhancement of Collaborative Research in the World:A Case Study of Osaka University 被引量:1
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作者 Shino Iwami toshihiko shimizu +4 位作者 Melvin John F.Empizo Jacque Lynn F.Gabayno Nobuhiko Sarukura Shota Fujii Yoshinari Sumimura 《Journal of Data and Information Science》 CSCD 2020年第4期75-85,共11页
Purpose:The purpose of this research is to provide evidence for decision-makers to realize the potentials of collaborations between countries/regions via the scientometric analysis of co-authoring in academic publicat... Purpose:The purpose of this research is to provide evidence for decision-makers to realize the potentials of collaborations between countries/regions via the scientometric analysis of co-authoring in academic publications.Design/methodology/approach:The approach is that Osaka University,which has set a strategy to become a global campus,is positioned to have a leading role to enhance such collaborations.This research measures co-authoring relations between Osaka University and other countries/regions to identify networks for fostering strong research collaborations.Findings:Five countries are identified as candidates for the future global campuses of Osaka University based on three factors,co-authoring relations,GDP growth,and population growth.Research limitations:The main limitation of this study is not being able to use the relations by the former positions of authors in Osaka University,because the data retrieved is limited by the query of the organization name at the first step.Practical implications:The significance of this work is to provide evidence for the university strategy to expand abroad based on the quantity and visualization of trends.Originality/value:With wider practical implementations,the approach of this research is useful in making a strategic roadmap for scientific organizations that intend to collaborate internationally. 展开更多
关键词 Co-authoring University management Overseas strategy Global campus Evidence-based policy-making
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一种自带采/保的10位20兆赫两级并行A/D转换器
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作者 toshihiko shimizu 邓荣祥 《微电子学》 CAS CSCD 1989年第6期9-17,共9页
本文叙述一种用于高清晰度电视机,办公用录像机及数字式视频摄像机等的优质视频系统10位20MHz A/D转换器。这种新开发的LSI A/D转换器使用标准的两级并行结构,具有自动增益调节和二位数据误差校准功能。同时在芯片内含一个采/保电路。... 本文叙述一种用于高清晰度电视机,办公用录像机及数字式视频摄像机等的优质视频系统10位20MHz A/D转换器。这种新开发的LSI A/D转换器使用标准的两级并行结构,具有自动增益调节和二位数据误差校准功能。同时在芯片内含一个采/保电路。它的制作是采用4.5GHz f_T, 3μm标准双极工艺技术。芯片面积为25mm^2,功耗为900mW。如此低功耗水平是至今为止所报导的最低值的一半左右。这个ADC可在20MHz转换频率下对8.5MHz的视频信号进行数字化处理。它的差动增益误差(DC)为 0.5%,差动相位误差(DP) 0.5度。 展开更多
关键词 A/D转换器 电视机 采/保 两级并行
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A Proposal for the Diagnosis and Treatment of Hypersensitivity State in Migraine
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作者 toshihiko shimizu Koichi Hirata +2 位作者 Shinya Manaka Yoshikazu Okada Ichiro Arakawa 《Journal of Pharmacy and Pharmacology》 2014年第10期592-599,共8页
The pathophysiology of migraines has been commonly explained by the trigeminovascular theory, although recent studies have suggested that the cause of migraines stems from cortical hyperexcitability. The aim of this s... The pathophysiology of migraines has been commonly explained by the trigeminovascular theory, although recent studies have suggested that the cause of migraines stems from cortical hyperexcitability. The aim of this study was to demonstrate the effectiveness of antiepileptic drugs for treating patients with cephalic hypersensitivity symptoms in Japan. In this study, we assessed the (1) demographics; (2) medical history; (3) treatment status and (4) electroencephalograms of the subjects. This study was performed after approval by the ethics committee at Tokyo Women's Medical University. We examined the electroencephalograms of 1,616 patients experiencing daily headaches accompanied by dizziness and cephalic ringing. Of these patients, approximately 80% had migraine without aura, and were asymptomatic before migraine onset. In addition, we measured the effects, dosages, and treatment durations of anti-epileptic drugs commonly prescribed as migraine prophylactics in 172 patients (age ~ standard deviation: 55.8 ~ 14.3 years) with cephalic hypersensitivity symptoms. Our results suggested that the electroencephalogram abnormalities related to cephalic hypersensitivity symptoms were associated with age and photophobia. Anti-epileptic drugs for cephalic hypersensitivity symptoms may be effective for reducing cerebral hypersensitivity. Statistics show that the drugs were markedly effective in about 28% of patients, moderately effective in 52% of patients, and not effective in 20% of patients. Our study suggests that erroneous migraine treatment methods from childhood may exacerbate hypersensitivity of the brain leading to the development of dizziness, tinnitus, or cephalic ringing, and shows that anti-epileptics are effective for treating this condition. 展开更多
关键词 HYPERSENSITIVITY MIGRAINE prophylactic medication EEG.
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