• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2006.06a
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• pp.10-24
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• 2006

• Proceedings of the Korea Port Economic Association Conference
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• 2006.08a
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• pp.145-158
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• 2006

• Proceedings of the KIEE Conference
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• 1987.11a
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• pp.359-361
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• 1987

It is known that the reactive component of AC power in the Power system gives no energy to outside and causes enlargement of power apparatus, voltage fluctuation and unstability of power system. The power conversion system and control system which are composed of power semiconductor devices such as Thyrisor, transistor, GTO and so on have been appeared as new sources of Harmonics. So the reduction of harmonics in power semiconductor system is one of impending problems on the point of energy conservation and improvement of power factor. This paper treates the fundamental review of the harmonics reduction by Current type PWM-Inverter. This Inverter-detects not only the fundamental wave but also that of all harmonics created in the power semiconductor system and is scheduled to control by sampled value.

• Geotechnical Engineering
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• v.23 no.7
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• pp.35-47
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• 2007

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2017.10a
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• pp.191-191
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• 2017

• Geotechnical Engineering
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• v.25 no.4
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• pp.62-75
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• 2009

• Journal of Acupuncture Research
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• v.17 no.3
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• pp.233-249
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• 2000

Objectives : Gimun-chimbub(Jimen-zhenfa) is the method of needling which is based on Gimun-hak (Jimen-xue), and it is the most excellent method of needling than any other methods. In spite of the superiority of Gimun-chimbub(Jimen-zhenfa), there are few documents which explain it in details. The purpose of this study is to make clear principle of Gimun(Jimen) & apptication of Gimun-chimbub(Jimen-zhenfa) so many clinicians can make good use of it. Methods : Through investigation of many documents concerning Gimun(Jimen), Gimun-chimbub(Jimen-zhenfa) and Bosa(buxie), the author first explained principle of Gimun(Jimen) and then made clear how to apply it in needling and how to perform Bosa(buxie). Conclusions : 1. Gimun-hak(Jimen-xue) is constituted combinations of infinite change of Chen-Gy-In Samje(Tianrendi Sancai) and Hado lakse(Hetu Luoshu). Gimun-hak(Jimen-xue), is the study which shows us the change of space time e- ntangling at once, and it is applied to troublous times and critical situations. Gimun-chimbub(Jimen-zhenfa) combines of the method of needling with the time when Chen(Tian) opens and closes. So according to each cases, doctor must consider the adequate time. For example, in case of acute disease, the first day when the patient got ill is ta - ken. In case of chronic disease, the day when the patient came to see a doctor is taken. In Gimun-chimbub(Jimen-zhenfa), first it uses Jik-Sa-Mun(zhishimen) which can ac - cept Chen-Gi(tianqi). When needling, doctor must find the accurate acu-points and perform Bosa(buxie). Finally it uses Saeng-Mun(shengmen) which stirs up the vit - ality. Using Saeng-Mun(shengmen) decreases the rate of relapse of diseases.

• The Korean Journal of Community Living Science
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• v.13 no.1
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• pp.15-23
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• 2002

There are a few alternatives to support the ‘Saeng-hwal-ji-do-sa’(Home Improvement Extention Specialist:community welfare specialist) ‘Family Welfare Specialist’(Ga-jeong-bok-ji-sa) are recommended to inhance the family life. Saeng-hwal-gwa-hak(human ecology) which is anticipated to lead the social empowerment and social movement applies to the community welfare. 1. Education program and data of Saeng-hwal-gwa-hak are to be based to community information welfare. 2. Community level workshop is to be practiced. 3. Education program and counseling are to be served in advance and the cure level. So research must be followed as community level and the result of it ought to be flown community welfare policy and administration.

• Journal of Korean Philosophical Society
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• v.105
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• pp.321-350
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• 2008

The purpose of this paper is to identify the difference between Sangsan-Simhak(象山心學) and Yangming-Simhak(陽明心學). This means that the whole history of Sung Confucianism needs to be understood based on changing philosophical paradigm according to the times, not general perception which regards the whole history of Sung Confucianism as Li-Hak (理學) and Sim-Hak(心學). This kind of perception is caused by the general perception which divides Sung Confucianism into Sim-Hak and Li-Hak. We regard the former as Chung-Chu study and the latter as Liu-Yang study. Because of this, Sangsan study is recognized as the former stage study of Yangming study and can not be placed in independent position in whole history of Sung Confucianism. And Sang is regarded that it takes diametrical opposition with Chuhsi study. So it is said that there is no point of sameness among them. But Sangsan study was generated from 'Song-Hak(宋學)' based on paradigm of Li-Hak and Yangming study was generated from 'Ming-Hak(明學)' based on paradigm of Sim-Hak. The difference between 'Song-Hak' and 'Ming-Hak' is generated from proposition called 'Sim is Li (心卽理)' that most research has overlooked. To identify these things, this paper examine the philosophical difference between 'Song-Hak' and 'Ming-Hak' and analyze the proposition 'Sim is Li(心卽理)' that regards Sangsan study and Yangming study as same philosophical system. And this paper identify the philosophical difference between Sangsan study and Yangming study by examining the method that the concept of 'Sim is Li(心卽理)' is applied in moral cultivation. This paper shows that the difference of interpretation about the concept of Li(理), between 'Song-Hak' based on Li paradigm and 'Ming-Hak' based on Ki-Hak(氣學) paradigm, causes different meaning in 'Sim is Li(心卽理)'. Through these, this paper demonstrate the difference between the paradigm of 'Song-Hak' that Chuhsi study and Sangsan study have and the paradigm of 'Ming-Hak' that Yangming study has and the fact which Sangsan study is systematic philosophy of Sung Confucianism in itself not former stage of Yangming study.

• Journal for History of Mathematics
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• v.27 no.1
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• pp.31-45
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• 2014

The book Su Hak Ip Mun(數學入門, Introduction to Mathematics) is one part of 5 sections of the book Seung Aeh Ill Chan(升厓日簒), which is a hand written manuscript in Chinese characters and the author and the date of writing is unknown. The book Seung Aeh Ill Chan begins with the song of division table so called Guguiga(九歸歌). We first investigate and compare the writing pattern of this with other old Korean mathematical books. Next, we investigate typical expression and calculation methods of mathematical contents and terminologies used in Su Hak Ip Mun and also figure out oddities of writing pattern of mathematical expression and cultural circumference of several problems dealt in the book. From these analysis and investigation, we estimate the writing date of Su Hak Ip Mun later than the year 1723 on which Su Ri Jeong On(數理精蘊) was first published. And we presumably guess that Guguiga and Su Hak Ip Mun are made not for practical use or theoretical purpose but for text to teach students.