GaAs 및 InP에서의 photoreflectance 특성 연구

이정열,배인호,김인수,장광수 嶺南大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.16 No.-

We investigated photoreflectance(PR) characterization of the Ⅲ-V group compound semiconductors with respect to modulation sources, those are, measured temperature and furnace annealing effect(FAE) of each sample. The band gap(??), broadening parameter(?), and dimensional number(n) of the critical point model by means of the band-to band transition were fitted by least-sqare root method for Aspnes' theoretical equation, and determined from the observed Franz-Keldysh oscillation(FKO). In particular, the Varshni equation and Bose-Einstein expression have been compared with the experimental results. After the thermal annealing, the crystallinity and the type conversion of each sample are observed and discussed.

정신과 의약분업에 대한 5년 후 추적조사

박정수,정재열,홍진표,백기청,박영현,박종익 大韓神經精神醫學會 2006 신경정신의학 Vol.45 No.4

Objectives : This study is designed to discuss the pros and cons related to the 'separation of drug prescription and dispensation' system when 5 years have passed by since the introduction of this system. Methods : The 592 psychiatrists from 1,107 working places took part in nationwide survey by mail or E-mail from June to September, 2005. The response rate was 23.8%, most of respondents came from private clinics. Results : The average age of psychiatrist was 44.6 years old, ranging from 25 to 75, most of them was predominantly male. The main results were as followings : 1) The ratio of psychiatric prescription out of hospital based on out-patients departments was the lowest in clinics, following by hospitals, general hospitals and university hospitals by order. 2) The main reasons of customer's preference for out of hospital prescription were economic advantage and self-awareness of prescription. As for the disliking for it, the most complaints were the anxiety about disclosure of psychiatric treatment, in convenience for delay and concern about drug change. Conclusion : Five years didn't seem to give a change on how the psychiatrists perceive the 'separation of drug prescription and dispensation' system at all. The confidentiality and human right issues on the part of psychiatric patients should never be ignored in order to manage this system successfully.

Al_(0.3)Ga_(0.7)As/GaAs HEMT 구조에서의 Photoreflectance에 관한 연구

이정열,김기홍,배인호,박성배,신영남 대구대학교 기초과학연구소 2000 基礎科學硏究 Vol.16 No.2

The optical characteristics of Al_(0.3)Ga_(0.7)As/GaAs HEMT structure were investigated by using the photoreflectance method. From the PR measurement, 2DEG transition energy related signal were obtained by between GaAs buffer and Al_(0.3)Ga_(0.7)As/GaAs spacer layer at the temperature of below about 150 K. And the transition energy is shift to low energy about 21 meV. We obtained that 2DEG transition energy, interface field and carrier concentration are 1.455 eV, 5.26 × 10⁴ V/cm and 7.18 × 10⁴cm^(-3), respectively.

Ⅲ-Ⅴ족 화합물 반도체에서의 Varshni 및 Bose-Einstein 계수 결정

이정열,김인수,배인호 嶺南大學校 基礎科學硏究所 1995 基礎科學硏究 Vol.15 No.-

The band gaps of the undoped semi-insulating and Si heavily doped n-GaAs(100) bulks were measured through photoreflectance spectra in the temperature range of 77 to 300K. Those values were fitted by least-square root method for Aspnes' theoretical equation, and determined from the observed Franz-Keldysh oscillation. Singularity, the Varshni equation and Bose-Einstein expression have been compared with the experimental results.

공조기 필터차압관리에 의한 팬동력 에너지 저감 평가 및 운용시스템 개발

곽노열,원근호,정광우,허정호 대한건축학회 2004 대한건축학회논문집 Vol.20 No.5

This paper presents the results of research into the problem of air filter management related with the air filter-associated fan energy consumption. Both energy performance data and air filter differential pressure of AHU in real commercial buildings were monitored and analyzed to investigate quantitatively energy impact as dust buildup level on air filter grows. An empirical equation was suggested through the regression analysis of multiple independent variables. An air filter differential pressure management model is also proposed and described as being an economical strategy in preventing high energy consumption. The system can create a useful alarm on a real time basis which would detect when an air filter needs to be changed and alert the building operator to do so, thereby minimizing the energy consumed by the air conditioning system.

副腎皮質 腺腫을 同伴하는 原發生 Aldosteronism

이기형,전정열 慶熙大學校 1983 論文集 Vol.12 No.-

A 41-year-old-woman with hypertension and hypokalemia underwent adrenalectomy for primary aldosteronism, She was found to have and adenoma in right adrenocortical region on pathologic result. The diagnosis was made by finding low plasma renin activity, which could not be stimulated, and unsuppresable elevated plasma or urin aldosterone. The localization of an adenoma was accomplished by adrenal angioraphy, venography ultrasonogram, and CT. The CT was more helpful to identify the localization of the tumor than other radiologic studies. The patient was recovered completly from hypertension and hypokalemia after operation.

과령, 후숙 여부 및 종자 크기에 따른 'Earth Ace' 멜론 종자의 건열처리 반응

최성민,이정명,백종열 경희대학교 생명자원과학연구원 2004 硏究論文集 Vol.23 No.-

멜론 과실의 년령 및 후숙 여부, 그리고 종자의 성숙정도에 따라 건열처리를 하였을 때 후숙을 시키지 않은 미숙종자에서만 유묘 출현이 다소 저조하였을 뿐 적숙종자와 과숙종자에서는 건열처리를 하지 않은 처리구에 비하여 최종 유묘 출현율에서는 유의차를 보이지 않았다. 그러나 파종 후 7일에 조사된 초기출현율에서는 건열처리에 의해 묘 출현이 현저히 지연되었는데 특히 후숙되지 않은 종자에서 그 정도가 심하였다. 유묘의 생체중과 건조중은 건열처리보다 무건열처리가 약간의 차이로 조금 더 무거웠으며, 건전묘의 발생조사에서는 후숙을 하지 않은 미숙종자를 제외하고는 건열처리 시 모두 양호한 정상묘 출현율을 보였다. 지하부 발달은 모든 처리구에서 건열처리에 따른 특이한 차이는 발견되지 않았다. 결론적으로 완숙한 과실을 수확하더라도 필히 일정 기간 이상의 후숙 과정을 거친 다음에 탈종하여야 건열처리에 의해 유발될지도 모르는 피해나 초기출현 지연현상을 최소화할 수 있었다. Experiments were conducted to investigate the effects of dry heat treatment (DHT) of seeds of 'Earth Ace' melon as affected by fruit maturity at the time of fruit harvest, duration of after-ripening, and seed sizes. Final seedling emergence percentages were not significantly influenced by dry heat treatment, except in those seeds extracted from immature fruit without after-ripening. However, early emergence rate, examined 7 days after sowing, was significantly lower in DHT seeds, especially those seeds extracted from the fruit without after-ripening. Seedlings grown from DHT seeds showed slightly lower seedling fresh and dry weight. No abnormal growth was noticed in root systems in all tested seedlings. In conclusion, a certain period of after-ripening of fruit is judged to be necessary to reduce the possible negative effective of DHT even though in fully-ripen fruits.

청소년의 식이행태 조사 : 서울·양평 두 지역간 비교 The Comparison of Urban and Rural Areas

최준호,안동현,최보율,강윤주,백영석,조연규,고복자,남정현 漢陽大學校 精神健康硏究 1998 精神健康硏究 Vol.17 No.-

청소년 식이태도와 식이행동의 횡문화적 연구

백영석,안동현,조연규,남정현,최보율,강윤주,고복자 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.3

연구목적 : 청소년을 대상으로 장애가 있는 식이태도 및 식이행동과 관련된 요인들에서 인종과 문화적 차이가 있는가를 보는 것이다. 방 법 : 1996년도에 3129명의 중고등학교 남녀 학생을 대상으로 학교 장면에서 신체 계측과 설문지를 통하여 수집하였으며 연령은 13세부터 16세 사이의 학생들로 분포되었다. 학생들의 분포는 서울 지역의 663명, 양평 지역의 821명, 조선족이 사는 연길 지역의 830명 그리고 한족이 사는 길림 지역의 815명이었으며, 그들은 모두 키, 몸무게, 신체질량지수, 부모의 수입, 아버지의 학력, 체중조절 설문지, 신체상 척도 및 식이태도검사 등의 내용을 완성하였다. 결 과 : 신체질량지수(BMI)에서는 지역, 성별, 사회경제적 상태에 따른 차이가 없었다. 연길과 길림 지역의 학생들이 서울과 양평 지역의 학생들보다 심한 저체중과 심한 과체중을 갖는 학생들이 많았다. 연길과 길림 지역의 학생들이 서울과 양평의 학생들보다 식이태도검사(EAT-26)의 평균치가 높아 식이태도와 식이행동이 나빴다. EAT-26의 20점 이상인 식이장애의 고위험군은 연길 지역의 학생이 6.9%로 네 집단 중에서 가장 많았다. 한국의 양평지역과 서울 지역의 학생들이 신체상 척도(BIS)의 평균치가 연길 지역과 길림 지역의 학생들보다 의미있게 높았다. 즉 한국의 학생들이 중국의 학생들보다 자신의 신체에 대하여 부정적인 생각을 갖고 있었다. 체중조절 행동의 유병율은 서울 지역 학생들이 26.7%, 양평 지역 학생들이 23.2%, 연길 지역 학생들이 10.6%, 그리고 길림 지역 학생들이 4.6%이었다. 식이조절과 운동은 한국의 학생들이, 식이조절과 약물사용은 중국의 학생들이 가장 많이 하는 방법이었다. 결 론 : 본 연구를 통하여 한국과 중국에서도 식이장애가 결코 적지 않을 것이라는 사실을 확인하였고, 식이장애는 인종과 사회문화적 요인에 의해 크게 영향을 받는다는 것, 마지막으로 식이태도와 식이행동 및 그와 관련된 요인들을 통해서 네 지역간의 문화전이 상태를 확인할 수 있었다. Objectives : The goal of this research was to attempt to examine ethnic and cultural differences in factors associated with disordered eating attitudes and behaviors. Methods : Data were collected from the four groups of 3,129 high school students aged between 13 and 16 years who completed school-based survey conducted in 1996. The students (663 Korean urban, 821 Korean rural, 830 Korean-Chinese and 815 Chinese adolescents) completed an instrument which assessed weight, height, Body Mass Index(BMI), parental income, father's level of education, weight control questionnaire, Body Image Scale(BIS), and eating attitudes and behaviors using the Eating Attitude Test-26(EAT-26). Results : BMI did not vary significantly by race, sex, and socioeconomic status. There were many severely underweight and severely overweight students among Korean-Chinese and Chinese than among Korean urban and Koran rural students. The EAT-26 mean scores of Korean-Chinese and Chinese subjects were significantly higher than those of Korean urban and Korean rural subjects. The EAT-26 mean score of Korean-Chinese was the highest among the four racial groups. The prevalence of high risk EAT-26(EAT-26≥20) students of Korean-Chinese was 6.9% which was the highest among the four groups. The BIS mean scores of Korean rural and Korean urban subjects were significantly higher than those of Korean-Chinese and Chinese subjects. The Korean subjects were more dissatisfied with their body than the Chinese. The prevalences of weight control behaviors were 26.7% in Korean urban, 23.2% in Korean rural, 10.6% in Korean-Chinese, and 4.6% in Chinese subjects. Dieting and exercise were most popular for weight reducing in Korean subjects. Dieting and drug use were most popular in Chinese subjects. Conclusion : These data suggest that there must be many eating disorder patients in Korea and China, and the eating attitudes and behaviors are influenced by ethnic and cultural factors. Implications for understanding sociocultural influence on eating attitudes and behaviors and acculturation are discussed.

수무지 다지증의 교정

차규호,최시호,설정현,김기열 대한성형외과학회 1992 Archives of Plastic Surgery Vol.19 No.3

There has been steady decrease in the number of traumatic injuries and inflammatory diseases of the hand, hence, the relative percentage of congenital malformation of the hand is becoming greater. The most common congenital anomaly of the hand is polydactyly and the principal goal of correction is the accurate establishment of the longitudinal skeletal axis. We have experienced 11 cases of duplicted thumbs and type IV by Wassel's classification was the most common type. For surgical correction, we used bone -ligament flap for joint rein forcement. Unnecessary metacarpal head was trimmed on both sides for centralization. We obtained a favorable results.