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ON THE ARC LENGTH UNDER INVERSION
현진오,양창홍 濟州大學校 師範大學 科學敎育硏究所 1993 科學敎育 Vol.10 No.1
Two points P and P' of the plane are said to be inverse with respect to a given circle (0)_(R), if OP·OP'=R^(2) and also if both points are on the same side of O. Circle (O)_(R) is called the circle of inversion and the transformation which sends point P into point P' is known a s an inversion. In this paper we consider the curves in two dimensional Euclidean space R^(Z) and prove that the length of a regular new curve segment β(t) of the inside curve α(t) under inversion is equal to the length of a regular curve segment a(t) by scalar multiple.
현진오,오창은 濟州大學校 師範大學 科學敎育硏究所 1998 科學敎育 Vol.15 No.-
This study approaches geometrically to different means such means such as arithmetic, the geometric, and the harmonic mean which are handled in the present cumculum of highschool mathematics and tries to give different definitions to these means and to find out another mean. It compares these means with each other on figures through Euclidean geometry. It makes a special study of the properties of each mean and the rrlations among these means about positive real numbers. It also introduces Inverse points and Harmonic points by generalizing more the geometric and the harmonic means.
남 북한 수학교과서의 내용체계 및 용어에 대한 비교분석 : 북한의 고등중학교 교과서를 중심으로
현진오,강태석 한국수학교육학회 1999 수학교육 Vol.38 No.2
The aim of this study is to determine a way to make mathematics textbooks after Korea is reunited. For this, the analysis of curriculum in South·North Korea must be made before unification. Therefore this study compares and analyzes the contents, organization and mathematics terms used in the latest middle school textbooks(1995-1996). And it also compared and contrasted the two textbooks while determining the best points of each. In this way, this study will be a very useful guide for making new educational curriculum and new mathematics textbooks after South and North Korea be unified.
A Transformation in the Product of Wiener Spaces
현진오,고봉수 제주대학교 1984 논문집 Vol.17 No.-
In this paper we extend Bearman's results, rotations in the product of two Wiener spaces, and give several results which prove useful in dealing with transformations in Wiener space.
Variable Acoustics in performance venues- A review
현진오,정대업 한국음향학회 2021 韓國音響學會誌 Vol.40 No.6
Domestically, demands for multi-purpose performance venues which accommodate various performance genres have increased. However, those venues have limited capability and confined to a primary performance. The present work investigated various methods for controlling the acoustics of room for required performance genres by reviewing aurally presented and published materials. The method of varying the acoustics of a space is called Variable Acoustics, and adjusted in either passive and active ways. Passive control encompasses variable absorption, variable volume, coupled volume, and canopy reflectors, where the acoustics of a room is controlled in an architectural way. Active control includes In-line, Regenerative, and Hybrid systems where the acoustics of a room is manipulated electronically. The mechanism and application of each passive control system in existing venues are reviewed and their pros and cons are discussed. Also, the concept of each active systems and product applications are looked at through literature reviews. Lastly, some considerations that need to be taken into in the planning and design stage of a multi-purpose hall using Variable Acoustics are suggested.
독도의 생태①-울릉도보다 180만년 앞서 생겨 생물도 다르다
현진오,Hyeon, Jin-O 대한결핵협회 2006 보건세계 Vol.53 No.9
대한결핵협회가 10월 1일 발행 예정인 "올해의 씰" 주제는 독도입니다. 많은 사람들이 "독도는 우리땅". "I love dokdo"라고 이야기하지만 독도에 대해 얼마나 알고 있는지는 의문입니다. 이에 보건세계는 2회에 걸쳐 독도의 자연환경과 생태에 대해 연재하고자 합니다. 2회의 연재를 통해 독도의 모든 것에 대해 알 수는 없겠지만, 독도에 대해 한 발짝 가까이 다가가는 기회가 될 것입니다.
중기하함(中氣下陷)으로 진단된 안검하수 환자와 요실금 환자의 한방치료 치험 각 1례
현진오,김진수,최동준,정승현,임성우,신길조,이원철,한창호,Hyun, Jin-Oh,Kim, Jin-Su,Choi, Dong-Jun,Jung, Seung-Hyun,Lim, Seong-Woo,Sin, Gil-Jo,Lee, Won-Chul,Han, Chang-Ho 대한한방내과학회 2006 大韓韓方內科學會誌 Vol.27 No.4
Junggi-haham (中氣下陷) is a term referring to lethargic symptoms such as digestive system disorder originating from energy deficiency. The authors applied therapy including Bojungikgi-tang(or Seungyangikgi-tang) and Bi-jeonggyuk method to two patients, one having ptosis and the other stress urinary incontinence, respectively, as Junggi-haham. Bojungikgi-tang is an herbal medication preparation and Bi-jeonggyuk is an acupuncture therapy method, and both are used to treat Junggi-haham symptoms. The combined treatment showed positive outcome, and the result suggests that Bojungikgi-tang and Bi-jeonggyuk are effective treatments for patients diagnosed as Junggi-haham.