특발성 좌심실빈맥(Idiopathic Left Ventricular Tachycardia)의 성공적인 전극도자절제술을 위해 단극전기도(Unipolar Electrogram)가 유용한가?

최기준,남기병,강덕현,홍명기,송재관,김재중,박성욱,박승정,박종훈,김유호 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.4

벼 생육 및 수집에 대한 대체농자재의 영향

문영훈,최정식,엄미정,한성수 한국환경농학회 2003 한국환경농학회지 Vol.22 No.4

본 시험은 환경농업기술을 직접 농가에 파급시킬 목적으로 3년간('96~'98)수행하였던 연구결과를 토대로 1999년에 환경농업 시범마을인 남원시 대강면 방산리의 일반농가포장에서 수행한 결과이다. 계분 발효퇴비와 깻묵을 시용한 환경농업과 절충형농업 시험구의 벼 생육은 화학비료를 시용한 일반관행농업 시험구에 비하여 저조하였으며, 왕우렁이(Ampullarius insularus)를 이용한 잡초방제 효과는 제초제 2회(초·중기)살포효과보다 우수하였다. 목초액의 병해충 방제효과는 저조하였고 또한 환경농업과 절충형농업 시험구의 정조수량은 일반관행농업 시험구에 비하여 3~5% 감소 되였다. 수질은 환경농업과 절충형농업 시험구가 일반관행농업 시험구에 비하여 COD, NO₃-N, SO₄^(2-), Cl^(-)이 낮았으며, 물벼룩의 밀도는 높았다. The aim of this study was to apply the new agricultural technique developed for three years(96-98) by demonstration at an model farm of environmental agriculture located in Bangsan-ri, Dagang-myun, Namwon-city. Rice growth of environmental farming plot, which supplied with oil cake and compost fermented with chicken manure was reduced compared to that of conventional farming plot, which supplied with chemical fertilizers. Weed control by using of Ampullarius insularus in the rice paddy field was effective compared to that of control, which treated with chemical herbicide twice. The yield of rice was decreased of 3-5% in both environmental and eclectic farming good compared to that of conventional farming plot. The water quality of environmental not and eclectic farming plot were good compared to conventional farming plot. Density of water flea was high in environmental and eclectic farming plot compared to that of the conventional farming plot.

뇌경색증의 급성기에 발생한 변비에 대한 연구

최윤이,김소이,김성은,정혜경,김태헌 이화여자대학교 의과학연구소 2015 EMJ (Ewha medical journal) Vol.38 No.1

Objectives: The prevalence of constipation is high after stroke. Multiple factors such as long-term bed-ridden status, comorbidity, medical illnesses are combined in this condition. However, the change of bowel movement during the early stage of stroke remainsuncertain. Methods: Patients with first stroke who admitted in a single institute from 2008 to 2009 were reviewed retrospectively and 36 patients were enrolled. As a control group, 47 consecutive orthopedic patients needing bed rest without surgery in the same period were enrolled. Data of stroke associated factors, frequency of BM (bowel movement) during 5 weeks, use of gastrointestinal medications, and outcomes were collected from the medical records. Results: The cumulative incidence of decreased (<3/week) and severely decreased BM (<1/week) were 80.6% and 69.4% in stroke patients and 53.2% and 14.9% in control group (P<0.05). The cumulative incidence of increased BM (>3/day) was 38.9% in stroke and 14.9% in control group. In acute stroke, 58% of patient showed severely decreased BM in first week, and the proportion was rapidly decreased below 15% from second week. However, laxative use increased with hospital days. The occurrence of severely decreased BM in stroke patients was associated with National Institutes of Health Stroke Scale (NIHSS; P=0.004). Severely decreased BM was not associated with poor outcomes including death, morbidity, and stroke recurrence. Conclusion: Decreased BM is common in acute stroke. The occurrence of severely decreased BM is associated with NIHSS. However, the severe manifestation occurred mainly in the first week, and considered to be well controlled by laxatives.

부산지역 산성강우의 장기적인 화학적 성상의 변화

황성욱,전보경,김찬훈,서정민,최금찬 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1

It is important to know the impacts of acid rain because of soil acidification, reduced biological productivity. Many researchers were interested in regional acid problems, and former research were focued in short-term trends of acid rain. It is not easy to evaluate acid rain problems because of many parameters relating to meteorological factors, which are wind, temperature, humidity and other factors. Rainfall sampling for this study was done from September 1933 to December 2000 in Dong-A University, Busan. All Samples were collected in separately to early fraction and succeeding fraction. Also, the samples were measured for pH, and EC, cations and anions were analysed by ion Chromatography.

잔류진동 억제를 위한 가상모드 입력성형기 개선

박상원,최훈석,홍성욱 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-

Input shaping is an efficient tool to eliminate residual vibration caused by motion of mechanical systems. However, the presence of input shapers may increase the rise time of system. This paper is concerned with the rise time reduction when using input shaping. To this end, this paper proposes an input shaper design method for an undamped single mode vibration system using virtual modes, which are not actual mode but reflected in the design process. This paper proposes a new input shaper which has multiple impulses as if a single mode system has more than one modes: one actual mode and several virtual modes. The natural frequencies of the virtual modes are design parameters to change the rise time of the system. This paper discusses the characteristics of the 1 virtual mode and 2 virtual mode input shapers. The performance of the proposed input shapers is tested by experiments.

마우스 골수 소핵 시험에 의한 디젤분진, HgCl_(2) 및 Pb(Ac)_2의 유전독성효과

허문영,최성규,유기선,손동헌 江原大學校 附設 環境硏究所 1989 環境硏究 Vol.6 No.-

The clastogenic effects of the diesel emission particle extrace(DEPE), mercuric chloride and lead acetate were examined by the mouse bone marrow micronucleus test. DEPE had a potent clastogenic effect by intraperitoneal injection with dose-response between 100 and 300mg/kg b.w.. Mercuric chloride and lead acetate also gave a clastogenic effects but mercuric chloride only had a dose-response between 1 and 3mg/kg b.w.. When DEPE was administrated with mercuric shloride or lead acetate, the frequency of micronucleated cells was slight but not significant incresase in comparision to a single treatment with DEPE alone.

중학생의 개인적 특성에 따른 자아정체감에 관한 연구

민수진,최웅재,김성훈 한국학교체육학회 2003 한국학교 체육학회지 Vol.13 No.1

본 연구는 중학생의 개인적특성에 따른 자아정체감을 살펴봄으로써 성장기의 자아정체감을 확립하는데 도움이 되는 기초자료를 제시하는데 그 목적이 있다. 본 연구의 연구대상은 2002년 현재 서울지역 중학교에 재학중인 학생으로 하였고, 층화표본추출법(Cluster random sampling)을 사용하여 서울을 강남과 강북으로 분류한 후 서울시 교육청에 등록된 학교에 난수표를 부여한 후, 각각 1개교씩 2개교를 선정하였다 선정된 학교에서 교사의 양해를 얻어 250명씩 총 500명을 표집하였다. 연구대상 500명 중 불성실하게 응답하거나 신뢰성이 떨어지는 53부를 제외한 447부가 본 연구의 분석자료로 사용되었다. 본 연구에서 사용한 측정도구는 설문지로 박아청(1996)이 제작한 한국형 자아정체성 검사 중 '정체감 유예'와 '정체감 혼미'를 제외한 '주체성', '자기수용성', '미래확신성', '목표지향성', '주도성', '친밀성'의 6개 영역을 각 8문항씩 총48문항으로 재구성한 류청렬(1999)의 검사지를 수정·보안하여 본 연구에 적합한 설문지를 완성하였다. 본 연구에서 자료분석을 위하여 사용된 분석방법은 SPSS 10.0 version 프로그램을 이용하여 신뢰도 분석(Reliab Analysis), T-검증(T-Test), 교차 분석(Crosstabs Analysis), 일원변량분석(one-way ANOVA) 및 요인 분석(factor Analysis)등의 통계기법을 사용하였다. 본 연구의 자료분석 결과와 논의를 통해 얻어진 결론은 다음과 같다. 개인적 특성의 변인으로 성별, 학년, 학업성적, 경제수준에 따라 자아정체감에서 성별은 '친밀성' 요인에 있어서는 여학생들이 남학생들보다 높게 나타났다. 학년은 '주도성', '목표지향성'. '자기수용성', '천밀성' 순으로 높게 나타났다. 학업성적은 학업성적이 높으면 전체 자아정체감이 높았으며, '친밀감', '자기수용성', '미래확신성', '주체성' 순서로 높게 나타났다. 경제수준은 '주체성'이 높게 나타났다. This study was intended to present the basic materials helpful for middle school students in their middle school days and establishing their self-identify in a period of growth. For this purpose, this study attempted to identify what effect middle school students' participation had on the formation of self-identity through the investigation of the relationship between their participation in self-identity. The questionnaire research was conducted for middle school students attending middle schools in Seoul as of 2002. For this purpose, 500 students were sampled using the duster random sampling method. 447 questionnaires returned from them were used as data for analysis of this study. Such statistical analysis techniques as reliability analysis, t-test, crosstabs analysis, one-way ANOVA and factor analysis were used to analyze data using the SFSS 10.0 version program. Based on the findings of this study, the following conclusion was drawn: First, an attempt was made to investigate self-identity according to such individual characteristic variables as sex, school year, school records and economic level. Middle school girls showed the higher level of intimacy than the schoolboys in terms of sex. Self-identity was shown to be higher in the ascending order of 'initiative', 'goal orientedness 'self-acceptance and 'intimacy' in terms of school year. Middle school students with better school records, showed the high overall self-identity, which was shown to be higher in the ascending order of 'intimacy', 'self-acceptance', 'future assurance', 'subjectivity'. They showed the high level of 'subjectivity' in terms of economic level.

GIS 및 지진취약도 분석기법을 활용한 창원시 교통망의 내진위험도 분석

이형진,김성훈,최승용 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

Recently seismic fragility analysis method has been widely used for the seismic probabilistic risk assessment of infrastructures such as nuclear power plants, buildings and bridges because of its probabilistic characteristics. Furthermore, this technique has been applied to large-scale social system consisted of each infrastructures by combing GIS. In this paper, the applicability of this technique to domestic infrastructure system. Example studies were performed about Changwon city. Nonlinear time history analysis, with a maximum likelihood approach were analysis of whole infrastructure systems. The results shows that it can be very useful to predict seismic probabilistic risk assessment of this domestic transportation network. However, it is also shown that further studies such as more suitable damage criterion to domestic structure and precise nonlinear analysis techniques should be developed to predict more precise results.

감마선과 Methyl Bromide 처리가 사과의 생리화학적 품질에 미치는 영향

강호진,정헌식,조덕조,변명우,최성진,최종욱,권중호 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2003 한국식품저장유통학회지 Vol.10 No.3

감마선(0, 0.5, 1, 2, 3 kGy) 조사와 methyl bromide(MeBr, 26 g/㎏, 4hr) 훈증 및 이들의 처리시기가 사과의 생리화학적 품질특성에 영향을 비교하여, 검역처리를 위한 ◁그림 삽입▷ (원문을 참조하세요) 감마선 조사의 응용성을 검토하였다. 감마선과 MeBr 처리에 따른 사과의 생리화학적 품질평가에서 2kGy 이상의 감마선 조사와 MeBr 훈증은 사과의 일부 생리화학적 품질특성의 변화를 촉진시키는 것으로 나타났다. 감마선과 MeBr의 처리시기별로는 수확 직후보다는 저온(0℃)에서 40일 정도 보관 후 처리한 대체적으로 품질손상이 적은 것으로 나타났다. 따라서 1kGy 이하의 감마선 조사와 지연조사는 사과 과실의 품질을 비교적 양호한 상태로 유지할 수 있어 검역처리 기술로 활용성이 있는 것으로 생각된다. 'Fuji' apples were treated by gamma irradiation (0∼3 kGy) or methyl bromide fumigation at commercial conditions (MeBr, 25 g/㎏, 4 hr) for quarantine purpose at two different treatment timing after harvest and stored under air a 0℃ for 4 months. Associated with the treatment timing of irradiation or fumigation, after 40 days of storage at 0℃ following harvest was more adequate than immediately after harvest in keeping qualities of stored apples. However, more than 2 kGy irradiation and MeBr fumigation were detrimental to physiological and chemical qualities of the fruits. These results show that less than 1 kGy irradiation at the delayed timing has a possibility to be applied as a quarantine procedure without significant changes in the quality of apples.

Junctional Rhythm을 보인 한국형 출혈열 1례

이성원,이수훈,최대현,손영기,차광수,손춘희,정원태,김성은,김종성 동아대학교의과대학 1997 동아의대학술지 Vol.9 No.1