fcc(face-centered cubic) structure의 에너지 밴드 측정

한성원,홍진수,배형철 순천향대학교 기초과학연구소 2011 순천향자연과학연구 논문집 Vol.17 No.2

Photonic band gaps(PBGs) are investigated for face-centered cubic structure composed of dielectric spheres and air spheres. It was found that PBGs exist for both cases. PBGs lie between the 6th-7th and 13th-14th for dielectric spheres and the 8th-9th for air spheres.

중ㆍ고등학생 응급처치 지식수준에 관한 실태 조사

홍경용,남철현,최상복,위광복,김기열 韓國保健敎育.健康增進學會 2001 보건교육건강증진학회지 Vol.18 No.3

This study was conducted to examine middle and high school students' knowledge level of first aid, health promotion, and safety. Data were collected from 1.165 students from March 6, 2000 to April 4, 2000. The results of this study are summarized as follows. 1.80.1% of the respondents felt the necessity of first aid. The sources of information about methods of first arid were school (43.9%), mass media (15.6%), and self-study (10.5%). 30.0% of them never leaned the methods of first aid. 2.In the case of obtaining information on first aid through mass media, 58.2% of them got it from TV. 7.3% of them obtained it from magazines, while 5.8% of them got it from newspapers. According to their viewpoints of adequate time to teach the methods of first aid, 38.6% of them thought that the methods had to be taught in the primary school and 25.2% of them thought that they had to be taught in the kindergarten. 24.9% of them replied that the methods had to be taught in the middle school, while 11.3% of them replied that they had to be taught in the high school. 3.The points for knowledge of first aid were 98.29±20.91 on the basis of 150 points (65.5 points on the basis of 100 points). The points showed significant differences in the variables of sex, education level, numbers of siblings, parents' education level, and guardian's occupation.

ZnSe-ZnS : Mn 직류 박막형 전자발광 소자의 제작 및 특성조사

洪性樂,崔致圭,金斗哲,玄東杰 제주대학교 1988 논문집 Vol.27 No.-

A ZnSe-ZnS : Mn dc thin flim electroluminescene device was fabricated electron beam evaporation method and investigated the charcteristics. The brightness-voltage characteristics for dc operation were measured . The threshold voltage was 32V and at 60V the maximum brightness was 95fL. The brightness depending on the layer thickness of thin flim increased and a brightness tended to saturate above 8000A and the optimum temperature of substrate was 200-230℃. The spectrum of this device had a maximum intenty at wavelength 585nm.

자동차 공조용 핀형 열교환기의 성능특성에 관한 연구

홍경한,전상신,이승재,박찬수,권일욱,김재열,김병철,하옥남 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.4

Fin-tube type(Fin-type) heat exchanger has been tested in order to replace the heat exchanger of parallel flow type(P.F-type) which is now widly used in automobile air conditioning system. The following conclusions are drawn by the comparison of the characteristics of the heat exchangers. Evaporator and condenser capacities and COP(Coefficience of performance) were varied as with the compressor speed, outdoor air temperature and air flow rate changed, which much influenced on the characteristics of the air conditioning system. Evaporator and condenser capacities were increased with increasing compressor speed and outdoor air temperature. Evaporator and condenser pressures of Fin- type were decreased by 7% and 5% respectively compared with those of P.F-type. The COP of Fin-type was decreased with increasing outdoor air temperature and compressor speed. The COP of P.F-type was decreased by 14% compared with that of Fin-type.

삼환계 항우울제(Dothiepin)가 우울증 환자의 수면에 미치는 영향 : 수면 다원 검사에 의한 연구 A Polysomnographic Study

홍승철,한진희,이성필,방승규 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.4

우울증환자군에서 삼환계 항우울제인 dothiepin 투여 후의 수면이 변화양성을 알아보며, 치료 후의 호전정도를 예측할 수 있는 치료 전과 치료 후의 수면변인을 조사하기 위하여 본 연구를 시행하였다. 수면상태는 수면다원검사를 실시하여 평가하였고, 우울증상의 심각도와 임상양상의 정도는 Hamilton 우울척도를 이용하여 평가하였다. 연구대상은 최소 14일 이상 약물을 투여 받지 않은 우울증 환자 16명(남자 7명, 여자 9명, 연령분포 23∼64세)으로 구성되었다. 수면다원검사는 약물을 투여하기 전과 약물투여 후 1주와 3주에 시행하여 다음과 같은 결과를 얻었다. 1) 항우울제 투여 1주와 3주 후 수면 연속성은 기준수면에 비하여 총수면 시간이 유의하게 증가하였고 수면잠재기는 단축되었으며, 수면도중 각성시간은 감소하였고, 수면효율은 증가되었다. 2) 항우울제 투여 1주와 3주 후 수면구조에서는 기준수면에 비하여 2단계 수면이 유의하게 증가하였다. 3) 항우울제 투여 1주와 3주 후 급속안구운동 수면은 기준수면에 비하여 유의하게 감소하였고, 급속안구운동 수면잠재기는 증가하였다. 4) 항우울제 투여 1주 후와 3주 후의 수면을 비교시 수면잠재기가 3주에 유의하게 감소된 외에는 수면 변인의 차이를 보이지 않았다. 5) 우울증상의 평가를 위하여 약물투여 1주 후와 3주 후에 시행한 Hamilton 우울척도 점수는 약물투여 전에 비하여 줄어들어 우울증상이 호전됨을 나타내었다. 6) 항우울제 투여 3주 후 치료반응이 좋았던 군의 수면특징은 기준수면에서 수면도중 각성시간이 증가된 경향을 나타내었고, 약물투여 1주 후의 수면에서는 4단계 수면의 양이 유의하게 감소되었다. 이상의 결과를 볼 때, 우울증환자에서 삼환계 항우울제인 dothiepin 투여 후의 수면변화는 치료초기에 나타났다. 기준수면에서 각성기간의 증가와 1주 후의 수면에서 4단계 수면의 감소는 약물치료에 좋은 반응과 관련된 수면변인으로 생각되었다. Objectives : This study was designed to investigate 1) sleep changes after antidepressant (dothiepin) treatment, and 2) sleep variables which seem to be associated with clinical response in the depressed patients. Methods : The subjects consisted of 16 patients who fullfilled the criteria for major depression by the Diagnostic and statistical Manual, (4th edition). Their sleep was recorded using polysomnography at the baseline and after one week and three weeks of dothiepin treatment. All subjects were further interviewed using Hamilton Rating Scale for Depression (HRSD) to rate the severity of their depression. High response to the drug was defined as a reduction of more than 50% of the HRSD score. Results : The results were as follows : 1) Depressed patients after dothiepin treatment showed more total sleep time(p=0.019), shorter sleep latency(p=0.05), less awake time(p=0.033), more sleep efficiency(p=0.018), more stage 2 sleep(p=0.002), less REM time(p=0.000), and longer REM sleep latency(p=0.004) than before treatment. 2) There were no differences in sleep variables between those who received 1 week and 3 weeks of dothiepin treatment except for the shortening of sleep latency after 3 weeks(p<0.05). 3) Depressive symptom scores on HRSD were reduced after 1 week and 3 weeks of dothiepin treatment as compared with the baseline. 4) High responders showed a tendency of increased wake time(p=0.054), while their stage 4 sleep decreased after 1 week of dothiepin treatment as compared with the low responders(p=0.0136). Conclusion : These results suggest that sleep of the depressed patients after dothiepin treatment tends to be normalized and sleep changes seem to appear early in the treatment phase. In addition, clinical response might be associated with greater wake time at the baseline and lesser stage 4 sleep after 1 week of dothiepin treatment.

새로운 중합체 용액에서 Laser 광산란 실험

홍성락,김두철 제주대학교 1986 논문집 Vol.23 No.-

A measurements of reduced viscosity and light scattering study on new polyamides solution containing crown ether moieties were made in the presence of a salt(K^(+).Cs^(+). Rb^(+)). The result was that the reduced viscosity of solution increased rapidly as the concentration of solution decreased even if it was different as a sort of salt. In study of light scattering experiment. the angular dependent intensities of scattered light from each solution were measured. The Rayleigh ratios calculated from these data suggested that a change in molecular shape from coil to rod was responsible for the increasein the reduced viscosity of the polymar solution with dilution The reduced visosity calculated from light scattering data agreed well with those measured with a viscometer.

몇가지 β-lactam 항생제의 약효평가를 위한 Minimum Inhibitory Concentration(MIC)의 비교

洪淳德,金鐘國,李東善,河相哲,李相瀚,李載蘭,安賢淑 慶北大學校 1991 論文集 Vol.51 No.-

In order to screen the new β-lactam antibiotics for clinical use. we were compared MIC values of various β-lactam antibiotics. We also tested the influence of pH, inoculum size, stability of antibiotics in medium and some kinds of media on MIC value. As a result, cefotaxime, cefoperazone, piperacillin, cefamandole, cephaloridine, cephapirin, cefazolin, cephalothin, cephaioylycn were scored in antimicrobial activity of MIC data.

구순 구개열 신생아에 적용한 Obturator의 효과에 관한 증례보고

홍성준,이긍호,최영철 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.2

구순 구개열 신생아는 출생시부터 수유의 어려움을 비롯하여 중이염, 언어장애, 부정교합, 부적절한 악안면 성장과 이로 인한 정신적 손상등에 직면하게 된다. 이런 복합적인 문제를 갖고 있는 신생아의 전반적인 치료를 위해서는 여러 관련분야 전문가들의 포괄적인 관리가 필요하다. 특히 수유의 어려움은 유아의 영양상태를 좌우할 수 있는 중요한 문제이므로 가장 먼저 관리하여야 할 부분이다. Obturator의 사용은 수유보조의 역할 뿐만 아니라 구강과 비강을 구분하여 중이염의 발생빈도를 감소시키고, 구개판의 성장을 촉진시키며, 정상적인 구강 안면조직의 발달을 유도할 수 있다. 소아치과 의사는 구순 구개열 신생아의 정상적인 성장, 발육을 위해 출생 직후 부모에게 적절한 수유방법의 조언과 함께 obturator를 장착해 주고, 다른 team과 긴밀한 협진을 통해 유치열기, 혼합치열기까지 지속적으로 치과적 관리를 제공하여야 한다. It has been reported that There is a relatively high incidence of congenital cleft lip and palate among congenital anomalies. Children with the cleft lip and palate confront various problems ranging from feeding difficulties as infants to frequebt ear infections, compromised speech, aberrant dentofacial development, malocclusion and esthetic impairment with its unfavorable effects on the psychosocial adaptation of the individual. Management of these patients is a process that starts in infancy and continues on into adulthood. Through a team approach, professionals from various fields convene to assess the needs of the child and to assist the parents in dealing with the situation. A pediatric dentist, one of the team, must advise the parents the way of feeding or make an obturator for normal feeding and weight gain of infants with cleft lip and/or palate. An obturator can aid nursing, stimulate orofacial development, help develop the palatal shelves, prevent tongue distortions, prevent nasal septum irritation, decrease chance of ear infections, expand collaped maxillary segments, constrict the expanded anterior part of the maxilla, reposition the premaxilla, and help the parents psychologically. Three cases of infants with cleft lip and palate were managed with the obturator at the Dept. of Pediatric Dentistry, Kyung Hee University. In all cases, infants showed normal feeding and weight gaining after the insertion of the obturator.

우수여자 유도선수들의 연간 트레이닝과 디트레이닝에 따른 무산소성 역치의 변화

홍관이,정정진,김학렬,김기진,조현철,손태열,노성규 龍仁大學校 體育科學硏究所 1992 體育科學硏究論叢 Vol.2 No.1

The seasonal variance for estimate of exercise intensity, energy expenditure, maximal oxygen uptake and anaerobic threshold of elite women judo players(Group Ⅰ:4,Group Ⅱ: 4) was measured during 3,5,7,9,10month. The results of this study is as follows. 1. Exercise intensity by %HRmax during seasonal training was shown range of 56.45-73.62, 65.56-82.15, 80.03-86.62, 62.06-68.83%HRmax, respectiveley, from 3 to 9month in the warm up, additional exercise, main exercise and cooling down. 2. Energy expenditure per min during seasonal training was shown range of 4.09-7.96, 5.41-8.66, 8.95-9.90 and 5.05-6.41Kcal/min, respectiveley, from 3 to 9month in the warn up, additional exercise, main exercise, main exercsie and cooling down. 3. Changes of maximal oxygen uptake(VO₂max)during seasonal training and detraining not significant difference between both group, and in the seasonal variance. However, maximal heart rate during detraining expressed significant difference(p<0.05) between both group. 4. Anaerobic threshold levels during seasonal training and detraining not significant difference between both group, and in the seasonal variance. However, AT-VE(1/min) and AT- work time(min) of group Ⅱ expressed significant difference(p<0.01) in the seasonal variance.

새로운 重合體 溶液에서 Laser 光散亂 實驗

洪性樂,金斗哲 濟州大學校 基礎科學硏究所 1988 基礎科學硏究 Vol.1 No.1

연구 대상인 중합체 분자에 염(??, ??, ??)을 일정한 비로 혼합하여 묽인 용액에 대한 광산란 실험결과로 부터 1) 산란각이 작은 영역에서 산출된 회전반경(??)이 농도가 묽어질수록, 그리고 염의 종류에 따라서는 ??>??>??순으로 증가하였다. 이는 Han이 측정한 환산점성도의 결과와 일치한다. 2) 산란각이 큰 영역에서 ??의 함수와 ??함수를 비교할 때 농도가 짙은 상태에서는 분자 모형이 코일형이며, 농도가 묽어짐에 따라 막대형으로 변하고 있음을 추정할 수 있다. 3) 광산란 실험 결과로 산출된 환산점성도 값(??)이 점성도계로 측정한 값(??)과 서로 잘 일치하며 농도가 묽어짐에 따라 분자의 축비율이 증가함을 알 수 있다. 이로부터 농도가 묽어짐에 따라 분자모양이 막대형으로 변하고 따라서 회전반경(??)이 커지고, 그 결과로서 환산 점성도가 증가된다고 볼 수 있다. A measurements of reduced viscosity and light scattering study on new polyamides solution containing crown ether moieties were made in the presence of a salt(??, ??, ??). The result was that the reduced viscosity of solution increased rapidly as the concentration of solution decreased even if it was different as a sort of salt. In study of light scattering experiment, the angular dependent intensities of scattered light from each solution were measured. The Rayleigh ratios calculated from these data suggested that a change in molecular shape from coil to rod was responsible for the increased in the reduced viscosity of the polymar solution with dilution. The reduced visosity calculated from light scattering data agreed well with those measured with a viscometer.