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A Novel Boost-Input Full-Bridge Converter
Sonoda Takahiro,Ninomiya Tamotsu,Tomioka Satoshi,Sato Kei,Terashi Hiroto The Korean Institute of Power Electronics 2005 JOURNAL OF POWER ELECTRONICS Vol.5 No.3
In order to correct the power boost topology has been used for easy control. But conventional boost topology has the following drawbacks: switching voltage surge, cross conduction current and right-half-plane zero of its control transfer function. Furthermore, in this topology the output voltage is always higher than the input voltage. As a result, a first-stage boost PFC converter needs to be connected with a second-stage DC-DC converter. A new topology which can be used as single stage PFC converter is proposed in this paper.
Sonoda, Megumi 한국일어일문학회 1995 日語日文學硏究 Vol.27 No.1
This paper discusses the acquisition order of anaphoric use of Japanese demonstratives expressions 'ko-' 'so-' 'a-'. This study is based on results of the questionnaire which were taken by English speaking learners of Japanese as foreign language. Learners are divided into three groups according to total studying hours of the language. The main findings of the paper are as follows: 1) Usage of 'ko-' was most easiry acquired. 2) Acquisition order of 'so-' is as follows: 1. demonstrating 'subjunctive' or 'future' tense. 2. demonstrating 'new information' for speakers. 3. demonstrating assumption of partner's knowledge. 3) Usage of 'a-' was difficult, which is used when domonstrating common kowledge' between speakers and listeners.
A Novel Boost-Input Full-Bridge Converter
Takahiro Sonoda,Tamotsu Ninomiya,Satoshi Tomioka,Kei Sato,Hiroto Terashi 전력전자학회 2005 JOURNAL OF POWER ELECTRONICS Vol.5 No.3
In order to correct the power boost topology has been used for easy control. But conventional boost topology has the following drawbacks: switching voltage surge, cross conduction current and right-half-plane zero of its control transfer function. Furthermore, in this topology the output voltage is always higher than the input voltage. As a result, a first-stage boost PFC converter needs to be connected with a second-stage DC-DC converter. A new topology which can be used as single stage PFC converter is proposed in this paper.
Shigeto Sonoda,Hong Keun Jang,박준식(Joon Shik Park) 지역사회학회 2014 지역사회학 Vol.15 No.3
The rise of the Korean multinationals is one of the most dramatic stories of East Asian post-development era. Many of the front runners of Korean companies could even catch up with the Japanese multinationals and eventually became crucial global players in major manufacturing industries. The rise of the Korean companies in global business world has never been predicted by any of the existing social theories. In order to explain how companies really move in East Asia, we must look deeper into the managerial fields where real corporate people from different countries are working for the companies. This paper is a trial to find significant relations between ups and downs of Asian multinational companies in China by paying attention on human resources factors. This study is especially concerned on the role of Korean multinational expatriates in comparison with the Japanese and Taiwanese counterparts competing in China. We have been focusing on the uniqueness of Korean multinational expatriates and try to relate the recent achievement of the Korean multinationals with distinctive human factors of the Korean companies. This paper is trying to suggest meaningful connections between human factor and company performances, which has been largely neglected by existing political and economic theories. In conclusion, this paper is addressing 'human resources' as one of the essential factors explaining company performances. Even though it is very confined to limited number of global companies, Korean companies and their employees try to train, educate, and mobilize more experienced and talented international human resources in China compared with those of the Japanese and Taiwanese, and this may provide us one of the reasons for their higher performances.