MOSFET의 Capacitor 에 관한 연구 ( A study on the Capacitor of MOSFET )

윤현민,이상목,김학선 한국통신학회 1992 한국통신학회 학술대회논문집 Vol.11 No.1

데이터마이닝을 활용한 해군함정 수리부속 수요예측

윤현민,김수환 한국산업경영시스템학회 2017 한국산업경영시스템학회지 Vol.40 No.4

Recent development in science and technology has modernized the weapon system of ROKN (Republic Of Korea Navy). Although the cost of purchasing, operating and maintaining the cutting-edge weapon systems has been increased significantly, the national defense expenditure is under a tight budget constraint. In order to maintain the availability of ships with low cost, we need accurate demand forecasts for spare parts. We attempted to find consumption pattern using data mining techniques. First we gathered a large amount of component consumption data through the DELIIS (Defense Logistics Intergrated Information System). Through data collection, we obtained 42 variables such as annual consumption quantity , ASL selection quantity, order-relase ratio. The objective variable is the quantity of spare parts purchased in f-year and MSE (Mean squared error) is used as the predictive power measure. To construct an optimal demand forecasting model, regression tree model, randomforest model, neural network model, and linear regression model were used as data mining techniques. The open software R was used for model construction. The results show that randomforest model is the best value of MSE. The important variables utilized in all models are consumption quantity, ASL selection quantity and order-release rate. The data related to the demand forecast of spare parts in the DELIIS was collected and the demand for the spare parts was estimated by using the data mining technique. Our approach shows improved performance in demand forecasting with higher accuracy then previous work. Also data mining can be used to identify variables that are related to demand forecasting.

애니메이션 겨울왕국에 대한 만 5세 유아의 선호요인 및 학부모?교사 인식

윤현민,이수형,이신애 한국어린이미디어학회 2014 어린이미디어연구 Vol.13 No.2

본 연구의 목적은 디즈니 애니메이션 ‘겨울왕국’을 관람한 유아를 대상으로 유아가 선호하는 애니메이 션의 실용적 속성(핵심적, 주변적) 및 감성적 속성(즐거움, 자극)을 고찰하고, 학부모와 교사가 인식 하는 긍정적, 부정적 영향을 탐색하고자 하는 것이다. 만 5세 유아 51명을 대상으로 구조화된 면담을 실시한 결과 유아들이 가장 선호하는 실용적 속성은 주인공 엘사를 중심으로 한 스토리, 캐릭터, 배 경, 마법, 음악이고, 가장 선호하는 감성적 속성은 울라프가 주는 재미와 행복감이었다. 남녀 간 선호 하는 속성에 있어 차이가 나타났는데 특히 남아의 경우 주인공 ‘엘사’의 예쁜 외모와 악인과의 대적 장 면이 주요 선호 요인이었다. 학부모?교사 설문 결과 유아의 이러한 선호는 문구, 도서 등 다양한 ‘겨 울왕국’ 관련 제품 구매로 이어졌고 이는 가정 및 유치원에서의 주요 갈등원인이 되기도 했다. 부모, 교사 모두 ‘겨울왕국’이 유아에게 미치는 영어 교육, 정서적, 사회적인 긍정적 영향을 인정했지만, 과 도한 시청 및 관련 상품에 대한 구매 요구로 인한 문제점을 지적하였다. 이러한 연구결과는 유아 애니 메이션 연구에 대한 이론적 기초 뿐 아니라 교육적 성찰을 제공하고 산업적으로 유용하게 활용될 수 있을 것이다.

도인기공체조가 여성의 肩臂痛에 미치는 效果

윤현민,김미영,김이순,임진섭 대한침구의학회 2005 대한침구의학회지 Vol.22 No.1

Objective : This study intends to identify the effects of the Doin Gigong Exercise on the shoulder-arm pain in Women. Methods : The study was performed with nonequivalent control group pretest-posttest design. A total of 45 subjects were divided into 25 persons in experimental groups and 20 persons in contrastive group by convenience sampling. The data were collected by using questionnaires and measured values from June, 2004, to August, 2004. Results : The results of the study are as follows: 1. The homogeneity testing revealed that most study variables were equally distributed between experimental and control groups. 2. The first hypothesis: The experimental group who performed the Doin Gigong Exercise and who decreased on the subjective symptom scale was supported(t=10.245, p=.000). 3. The scond hypothesis : The experimental group who received Doin Gigong Exercise and who decreased on the subjective pain(VAS) was supported(t=6.816, p=.000). 4. The third hypothesis: The experimental group who received Doin Gigong Exercise and who decreased on the muscular stiffness measured techniques(UNIQUE) was supported (t=7.114, p=.000). Conclusion : Based on the results described above, it is considered that the Doin Gigon Exercise is clearly effective in all an values of the 5 measured. Therefore, the Doin Gigong Exercise can be thought of as effective nursing intervention for the reduction of shoulder-arm pain in women.

음향반향신호의 제거를 위한 개선된 직교투사법

윤현민,Yun Hyun-min 한국정보통신학회 2005 한국정보통신학회논문지 Vol.9 No.4

본 논문에서는 음향반향 제거기에서 음성에 대하여 반향제거를 위한 진보된 새로운 기술인 개선된 직교투사법을 제안하였다. 이 결과를 NLMS(normalized least mean square) 적응 알고리즘과 비교하여 보면 개선된 직교투사법은 큰 자기상관을 갖는 신호에 대하여 음향제거 과정이 개선되는 것을 보여준다. 본 논문에서 제안한 개선된 직교투사법의 과정을 검증하기 위하여 프로그램을 작성하여 컴퓨터 모의실험을 실행하여 잡음과 음성에 대해 두개의 적응 알고리즘을 사용하여 수렴곡선을 관찰하였다. 이 두개의 입력신호의 모의실험 결과로부터 본 논문에서 제안한 방법을 음성과 잡음에 적용시킨 결과 빠른 수렴과 ERLE(echo return loss enhancement)가 높음을 보여주었다. This paper proposes the improved orthogonal projection method as a new technique advancing the performance of the echo cancellation for speeches in the acoustic echo canceller. Comparing with the used NLMS adaptive algorithm, it shows that this method improves the performance of the echo cancellation for signals with the large auto-correlation. In order to testify performances of the orthogonal projection method whom this paper proposes, we have coded a simulation program and executed computer simulations. We observed convergence curves by using two adaptive algorithm for noises and speeches. From simulation results for two input signals, the proposed method shows the high ERLE and the fast convergence and the stable operation in case of using speeches as well as noises.

帶下의 鍼灸治療에 關한 文獻的 考察

尹炫珉,安昌範 동의대학교 한의학연구소 1999 동의한의연구 Vol.3 No.-

The purpose of this reivew was to study acupunture and moxa treatments for abnormal leukorrhea. Normal leukorrhea is always secreted in female vagina. It increased usually by infection(Trichomoniasis and Candidiasis), turmor and so on. In acupunrure therapy meridians of Bladder, Stomach and Spleen were mostly used for them in connection with the functions of each meridians. In particular, Chung-guk(cv3), Kwan-won(cv4) points of Conception vessal Meridian and Samum-gyo point of Spleen meridian are frequently applied in leukorrhea.

아동을 위한 지능형 서비스 로봇 활용 방안

윤현민 한국어린이미디어학회 2010 한국어린이미디어학회 학술대회 자료집 Vol.2010 No.6

원발성 월경곤란증의 침치료 효과에 대한 임상시험

윤현민,김철홍,박재홍,한민석,이인선,최선미,박지은,김규곤 대한침구의학회 2008 대한침구의학회지 Vol.25 No.3

Objectives : Korean tradithional acupuncture Theory, Sa-am’s 5 phases acupuncture method was ori- ginated in 1644-1742, in the middle of the Cho Sun dynasty. This study was to vertify the effect of Sa-am Acupuncture Treatment on Primary dysmenorrhea of Women. Methods : The subjects were 80 volunteers who was suffering for dysmenorrhea, employed using Mea- sure of Menstrual Pain (MMP) questionnaire. Subjects were divided into two groups including Sa-am acupuncture treatment group(n=25), minimal acupuncture treatment group(n=22). They had agreed to take part in this experiment, with didn’t take any anodyne drugs. In the acupuncture group, subjects were stimulated at G41, SI3, B66, SI2(Small intestine jung-guk), SP6, CV6 and one points were inserted additionally depending the symptoms among ST36 or LI2. In the control group, subjects were needled at 5 non-acupuncture points have any effect on Dysmenorrhea. A total of 8 acupuncture sessions were performed for each patient depending on the individual menstruation cycle The MMP score by using 7 questions and the Menstrual Symptom Severity List(MSSL-D) was mea- sured before and after menstruation cycle. Collected data were analyzed as frequency, percentage, paired t-test, independent t-test using SPSS 10.0 WIN Program. Results : Acupuncture treatment produced a significant decreasing the symptom of Primary dysme- norrhea in two groups, but a statistically significant difference was not shown in the acupuncture group compare to control group. Conclusions : Based on the above results, it was verified that Acupuncture Treatment was effective in decreasing the symptom of Primary Dysmenorrhea.

胡桃藥鍼이 人間의 신경교종 細胞에 유발된 低酸素症에 대한 防禦效果

尹炫珉,許宰榮,安昌範 대한침구의학회 2003 대한침구의학회지 Vol.20 No.1

胡桃藥鍼이 人間의 신경교종 細胞에 유발된 低酸素症에 대한 防禦效果

3차원 정상상태의 드리프트-확산 방정식의 해석 프로그램 개발

윤현민,김태한,김대영,김철성 대한전자공학회 1997 電子工學會論文誌, D Vol.d34 No.8

The device simulator (BANDIS) which can analyze efficiently the electrical characteristics of the semiconductor devices under the three dimensional stationary conditions on the IBM PC was developed. Poisson, electon and hole continuity equations are discretized y te galerkin method using a tetrahedron as af finite element. The frontal solver which has exquisite data structures and advanced input/output functions is dused for the matrix solver which needs the highest cost in the three dimensional device simulation. The discretization method of the continuity equations used in BANDIS are compared with that of the scharfetter-gummel method used in the commercial three-dimensional device. To verify an accuracy and the efficiency of the discretization method, the simulation results of the PN junction diode and the BJT from BANDIS are compared with those of the commercial three-dimensiional device simulator such as DAVINCI. The maximum relative error within 2% and the average number of iterations needed for the convergence is decreased by more than 20%. The total simulation time of the BJT with 25542 nodes is decreased to about 60% compared with that of DAVINCI.