雪嶽山 신갈나무林의 植物社會學的 硏究

이우철,白元基,金文基 江原大學校 附設 環境硏究所 1994 環境硏究 Vol.11 No.-

A phytosociological study on the Mongolian oak forest was carried out on Mt, Sorak by the Z-M method. The Mongolian oak forest was classified into one oder, two alliances, one association and three communities : Rhododendro-Quercetalia mongolicae Kim 1990 Lindero-Quercion mongolicae Kim 1990 Vaccinium hirtum v. koreanum-Quercus mongolica Community Lespedeza maximowiczii-Quercus mongolica Community Pino koraiensis-Quercion mongolicae Kim 1992 Typical community Lichno-Quercetum mongolicae Kim 1992 Total vascular plant species in investigatied sites consisted of 193 taxa, and their life-farm composition Was H-D_(1)-R_(5)-e type.

컴퓨터 내장형 비파괴검사용 초음파탐상기 개발

김양래,이원흠,김선형,이순흠,최관순,김진구 韓國非破壞檢査學會 1997 한국비파괴검사학회지 Vol.17 No.2

현재 널리 사용되고 있는 비파괴검사중의 하나인 초음파탐상검사(ultrasonic testing)는 교량, 발전소, 석유화학프랜트 및 중공업분야 등에 사용되는 각종 구조물의 사용전ㆍ중검사에 폭넓게 응용되고 있으며, 구조물의 안전관리와 품질관리에 필수적으로 요구되고 있다. 또한, 이들 구조물에 존재하는 결함에 대한 정량적 평가 및 검사 데이타의 해석에 많은 연구가 진행되고 있다. 기존의 초음파탐상검사에 사용되는 휴대용 초음파탐상기의 단점을 보안하기 위해 컴퓨터 내장형 초음파탐상기가 선진국에서 개발되고 있으며 다양한 소프트웨어의 사용에 따른 검사 신뢰도가 향상되고 있다. 본 연구는 컴퓨터 내장형 초음파탐상기를 구성하고, 이를 콘트롤할 수 있는 프로그램, 검사결과의 저장 및 신호 처리 해석이 가능한 소프트웨어를 개발하였다. Ultrasonic testing is one of the most widely used method of nondestructive testing for pre-service inspection(PSI) & in-service inspection(ISI) in structures of bridges, power plants, chemical plants & heavy industrial fields. It is very important to estimate safety, life, quality of structures. Also, a lot of research for quantities evaluation & analysis inspection data is proceeding. But traditional portable ultrasonic flaw detector had been following disadvantages. 1) Analog ultrasonic flaw detector decreased credibility of ultrasonic test, because it is impossible for saving data & digital signal processing. 2) Stand-alone digital ultrasonic flaw detector cannot effectively evaluate received signals because of lack of its storage memory. To overcome this shortcoming, we develop the computer based ultrasonic flaw detector for nondestructive testing. It can store the received signal and effectively evaluate the signal, and then enhance the reliability of the testing results.

결핵성 중이염의 임상적 고찰

박병원,조우령,석상렬,김서규,김명구,권오준,김병헌 대한이비인후과학회 1999 대한이비인후과학회지 두경부외과학 Vol.42 No.8

면접조사를 통한 초등학생의 영양교육 실태 및 실천도 조사

오유진,이영미,김정현,안홍석,김정원,박혜련,서정숙,김경원,권오란,박혜경,이은주,성현이 대한지역사회영양학회 2008 대한지역사회영양학회지 Vol.13 No.4

This study investigated the experience and practice of elementary school students on nutrition education. The data were collected from 217 male and female students attending 5-6th grade elementary schools in Seoul and Kyunggi-Do from March to June 2007, interviewing face to face by a nutrition teacher and 3 interns of a nutrition teacher. The results were as follows: 86.5% of the subjects learned about ‘Table etiquette’, ‘Reasons for eating fruits and vegetables’ (78.7%), ‘Food waste and environment’ (72.3%), ‘Healthy snacks’ (55.7%), ‘Food sanitation’ (52.3%), ‘Food culture of foreign countries’ (48.1%). Nutrition education experience was significantly different by gender. A total of 43.5% boys responded that they never learned about ‘basic food preperation’ (p < 0.01). They had learned ‘Nutrients for body’ and ‘Food waste and environment’ in school, ‘Healthy weight loss’, ‘Food culture of foreign countries’, ‘Food circulation’ on television, Most content (‘Table etiquette’, ‘Simple cooking’, ‘Food sanitati n’, ‘Eating behaviors for health’, ‘Reasons for eating fruits and vegetables’, ‘Healthy snacks’) was learned from parents. The practice after nutrition education was higher in ‘Table etiquette’ (2.14), ‘Eating fruits and vegetables’ (2.07) than others compared with education experience. The most reason of non-practice on nutrition information was ‘Troublesome’. In ‘Nutrients for body’, a boy answered ‘Difficult for practice’ 20.0%, a girl answered ‘Difficult to understand’ 32.6%, showing a significant difference between the gender groups (p < 0.001). They remembered the ‘Nutrients for body’ (49.6%), ‘Food sanitation’ (44.5%) because of ‘important content’,‘Basic food preparation’ (40.6%), ‘Food culture of foreign countries’ (36.3%) because of ‘interesting content’, ‘Healthy weight loss’ (52.0%), ‘Eating behavior for health’ (44.5%) and ‘Healthy snacks’ (33.7%) because of ‘need for my health’.

H9c2 심근 세포주에서 외인성 nitric oxide가 허혈에 의한 세포 독성에 미치는 영향

정성구,장현용,김명천,고영관,정주호,배영미,박원서,김대중,유영민,김성수,임성빈 대한응급의학회 2001 대한응급의학회지 Vol.12 No.4

Background: Nitric oxide(NO) is known to have protective effects on an ischemic heart and to exert triggering effects on ischemic preconditioning. However, the effects of NO during the ischemic period have not been investigated. To investigate the role of exogenous nitric oxide in a model of ischemic heart cell death, we studied the effects of ischemic preconditioning and ischemia in a normal and an ischemic buffer. Methods: Rat cardiac myoblast cells(H9c2) were cultured in a normal and an ischemic buffered medium. For the ischemic culture of heart cells, the cells were cultured in a dessicator with GasPak for 5 hrs. In ischemic preconditioning, the cells were pretreated with ischemic buffer for 5 min and then perfused with normal medium for 30 min. For the measurement of the cytotoxicity, a MTT(3-4-Sdimethylthiazol-2-yl-2,5-diphenyl tetrazolium bromide) assay was performed. A DAPI(4',6-diamidino-2-phenylindole dihydrochloride) staining procedure and a flow cytometry analysis were performed to confirm apoptotic cell death by ischemia. Results: Cell viability, as determined by using a MTT assay, showed that the preconditioned group treated with NO showed more cell death than with the not-preconditioned groups in both normal and ischemic buffers. But, In normal medium and not-preconditioned groups, NO showed protective effect according to the concentrations(100,1000μM) . No treatment with NO produced the different results. In normal medium, the protective effect of ischemic preconditioning was demonstrated, but no protective effect of ischemic preconditioning could be seen in the case of the ischemic buffer. The DAPI staining and flow cytometry analysis of heart cells showed characteristic apoptotic features. Conclusion: NO added in the ischemic phase had deterious effects on heart cells. Ischemic preconditioning was more harmful than ischemia alone. The toxicity of the cells was characteristic apoptosis.

高脂肪性食餌로 因한 高脂血症 白鼠에 首烏延壽丹이 미치는 影響

金庸柱,최달영,김준기,박원환 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

This study was done in order to investigate the effect of Suoyensudan on hyperlipidemia. Results: 1. The level of serum total cholesterol was decreased with the significance in the sample groups as compared with the control groups. 2. The level of serum HDL-cholesterol was increased with significance in sample groups as compared with the control groups. 3. The level of serum phospholipid was increased with significance in Sample 1 group as compared with Control 1 group, but Sample 2 group did not show significance as compared with Control 2 group. 4. The level of serum β-lipoprotein was decreased with the significance in Control 1 group, but control 2 group did not show significance. 5. Rate of total cholesterol vs. HDL-cholesterol and total cholesterol vs phospholipid were increased in the sample groups as compared with the control groups. Conclusion; It is considered that Suoyensudan respectively had recovering effect on the Hyperlipidemia induced by cholesterol in male rats. So it can be use to prvent and treat hyperlipidemia and related deseases.

가우시안 혼합 모델을 이용한 문장 및 화자 독립 감정 인식

김원구 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

The pattern recognition algorithms and feature parameters for emotion recognition are studied. In this paper, KNN algorithm was used as the pattern matching technique for comparison, and also VQ and GMM were used for speaker and context independent recognition. The speech parameters used as the feature are pitch, energy, MFCC and their first and second derivatives. Experimental results showed that emotion recognizer using MFCC and their derivatives as a feature showed better performance than that using the pitch and energy parameters. For pattern recognition algorithm, GMM based emotion recognizer was superior to KNN and VQ based recognizer.

다중 평행판 축전기형 전송회로를 사용한 질소레이저의 제작과 출력 특성의 기체 온도 의존성

김원호,양준목,추한태 충남대학교 기초과학연구소 1994 忠南科學硏究誌 Vol.21 No.1

We have studied the operational characteristics of a nitrogen laser system which consists of a laser tube of 200 ㎜ in length, multiple parallel plate capacitor type transmission circuitry, pulse type high voltage power source and temperature control system for the nitrogen gas. The optimum operational condition is measured to be 30 ℃ in gas temperature, 70 torr in gas pressure, and E/P of 411 (V/㎝.torr) at 4 ㎜ in spark gap spacing and 20 ㎐ in repetation rate. With increasing the nitrogen gas temperature, the optimum nitrogen gas pressure is found to be increased but the optimum value of E/P is decreased. These results are in accordance with the theory of other studies so far.

경쟁제한적 기업결합

김재걸,김원규 牧園大學校 社會科學硏究所 1997 産經硏究 Vol.13 No.-

오늘의 우리 경제는 부도 직전에 IMF로부터의 긴급지원으로 가까스로 위기를 면하게 된듯하다. 그러나, 그 대가로서 감수해야 할 고통이 예상되는 것도 주지의 사실이다. 그 중에서도, 외국인의 국내기업에 대한 주식투자 한도가 무제한으로 됨에 따라, 국내 기업은 외국인 투자가들의 사냥감이 되게 되었고, 만일 외국인에 의한 인수 ( 합병을 저지하고자 한다면 국내 투자가들에 의한 인수 ( 합병이 있어야 하는 등, 소위 기업의 인수 ( 합병(M&A)이 예상되고 있다. 이러한 시점에서 본 논문은, 기업의 인수 ( 합병의 개념을 파악하고, 이러한 경우에 있어서의 독점규제 및 공정거래에 관한 법률의 규제 대상(일정한 거래분야에 있어서 경쟁을 실질적으로 제한하는 기업결합)이 되는 기업의 인수 ( 합병은 어떠한 것이며, 또한 이러한 것을 가려내는 방법 즉 판단기준은 무엇인가에 관하여, 우리 나라 공정거래위원회 및 일본의 공정거래위원회의 구체적인 심결례를 통하여 서술한다. 그러나, 현행 독점규제 및 공정거래에 관한 법률에 의할 경우에는 그 판단이 곤란한 점이 많기 때문에, 이를 보완하기 위한 법적 조치가 필요함을 지적한다.

피치 변환 기법을 사용한 실시간 음성 변환 알고니즘

김원구 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-

In this paper, real-time voice change method using pitch change technique is proposed to change one's voice to the other voice. For this purpose, sampling rate change method using DFT (Discrete Fourier Transform) method and time scale modification method using SOLA(Synchronized OverLap and Add) method is combined to change pitch. In order to evaluate the performance of the proposed method, voice transformation experiments were conducted. Experimental results showed that original speech signal is changed to the other speech signal in which original speaker's identity is difficult to find.