Weight Training이 身體構成과 筋力에 미치는 效果

崔哲瑛,高忠煥 제주한라대학 1998 論文集 Vol.22 No.-

The purpose of this study was to observe the effects of 12 weeks weight training on Body composition and Strength. The healthy male in che ju are randomly selected as subjects. The procedure of this experiment are as follows. 20 subjects are divided into two groups : G - 1 (High load - 10 Reps) , G - 2 (Low load - 20 Reps). All two groups trained for 12 weeks: Monday, Wednesday, Friday. During each workout following lifts are used : Bench press, Leg press, Barbell curl. Lat pull-down, Standimg press, Triceps extension, Dumbbell fly and Sit-up. The conclusion were as follows: 1. Changes of physique of before and after training. Body weight, chest girth, bicep girth did not increase significantly in G - 2 but Body weight (3.4 %) , chest girth (3. 0%) , bicep girth (2. 4%) and thigh girth (2. 7%) increased significantly (P < 0.05) in G - 1. 2. Changes of body composition of before and after training. % Fat and Fat weight did not decrease significantiy in both groups. Lean body mass did not increase significantiy in G-2, but increased (4.2%) significantly (P < 0.05) in G - 1. 3. Changes of muscular strength of before and after training. Hand grip (left, right), back muscle strength, bench press and lgg press incresd(P <0.001) significantly in both groups. but high load group (G - 1) slightly more incresed than in low load group (G-2).

가압하의 SHS 반응에 의한 섬유강화 복합체의 제조

방환철,김봉섭,임동원,고철호,윤존도 경남대학교 신소재연구소 1999 論文集 Vol.11 No.-

고압연소소결법으로 TiC 섬유강화 금속 Ti 매트릭스와 Al2O3 매트릭스의 치밀 복합체를 제조하였다. 합성된 시편의 미세구조 관찰 결과 복합체는 대부분의 탄소섬유가 배향된 상태로 잘 분산되어 있었다. 합성된 TiC 치밀체는 반응시간이 증가할수록 첨가된 Ti의 몰 비가 증가할수록 밀도가 증가하였다. 섬유표면에 코팅되어 있는 사이징제를 제거한 섬유를 사용하였을 경우 탄소섬유와 매트릭스 사이에 존재하는 미세기공을 제거할 수 있었다. Dense composites of titanium matrix and A1203 matrix reinforced with fibrous Tic were successfully fabricated by combustion reaction under 30 MPa of uniaxial pressure with an aid of external heating in vacuum. Microstructural analyses by SEM showed that the fibers were found uniformly distributed, well-defind and aligned in the matrix. As a mole ratio of Ti/C or external heating time increased, the density of TiC composite increased. In case of using carbon fibers, from which the sizing agent was removed. micro pores around fibers disappeared.

수종의 엔진구동형 Nickel-Titanium file을 이용한 근관형성 방법이 근관만곡도 유지능력에 미치는 영향

이철환,조경모,홍찬의 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.1

There are increasing usage of Nickel-Titanium rotary files in modern clinical endodontic treatment because it is effective and fater than hand filing due to reduced step. This study was conducted to evaluate the effect of canal preparations using 3 different rotary Nickel-Titanium files that has different cross sectional shape and taper on the maintenance of canal curvature. Simulated resin block were instrumented with Profile(Dentsply, USA), GT rotary files(Dentsply, USA), Hero 642(Micro-Mega, France), and Pro-Taper(Dentsply, USA). The image of Pre-instrumentation and Post-instrumentation were acquired using digital camera and overspreaded in the computer. Then the total differences of canal diameter, deviation at the outer portion of curvature, deviation at the inner portion of curvature, movement of center of the canal and the centering ratio at the pre-determined level from the apex were measured. Results were statistically analyzed by means of ANOVA, followed by Scheffe test at a significance level of 0.05. The results were as follows; 1. Deviation at the outer portion of curvature, deviation at the inner portion of curvature were showed largest in Pro-Taper, so also did in the total differences of canal diameter(p<0.05). 2. All the groups showed movements of center. Profile combined with GT rotary files and Hero 642 has no difference but Pro-Taper showed the most deviation(p<0.05). 3. At the 1, 2, 3mm level from the apex movements of center directed toward the outer portion of curvature, but in 4, 5 mm level directed toward the inner portion of curvature(p<0.05). As a results of this study, it could be concluded that combined use of other Nickel-Titanium rotary files is strongly recommended when use Pro-Taper file because it could be remove too much canal structure and also made more deviation of canal curvature than others.

24주간 추적하는 임상 연구에서 한국인 남자 알코올 의존 환자의 비재발률

강철중,김성곤,남궁기,조동환,이병욱,최인근,최용성,박성봉,제영묘,김현경,김성연 大韓神經精神醫學會 2006 신경정신의학 Vol.45 No.1

Objetives : In order to provide useful data tbr the further clinical studies with Korean alcohol-dependent patients, enrollment and non-relapse rates were investigated while alcohol-dependent patients wcre followed up for 24 weeks. Methods : The subjects of this study were alcohol-dependent male patients who, for the first time, visited a hospital among 3 groups of hospitals, University Hospital, General Hospital or Mental Hospital, or those who needed to be followed up after discharge from those hospitals. After assigning 12 subjects to each hospital, we investigated enrollment and non-relapse rates while cognitive-behavioral therapy and pharmacotherapy were provided. Results : 1) Forty-eight patients were enrolled and the rate of enrollment was 36.4%. The enrollment rate in the University Hospital group was 52.1%, in the General Hospital group 50.0%. and in the Mental Hospital group 10.4%. 2) In 48 patients, non-relapse rate was 27.1% at 12 week and 18.8% at 24 weeks after starting follow-up. It was 24.4% and 20.0% at 12 and 24 weeks, repectively, in the University Hospital group while the General Hospital group showed 33.3% and 16.7%, respectively, and the Mental Hospital Group showed 20.0% at both 12 and 24 weeks. Conclusion : These results provide important data for further clinical studies of Korean alcohol-dependent patients.

생명의 신비에 대한 시각화 연구 : 태고(太古)의 여행 Travel of ancient times

황철환 한국사진학회 2003 AURA Vol.0 No.10

It is said that life itself is not an entity observed from the objective point of view. We often say that life is an substances not apprehensible in the terms of our cognitive description such that death itself is an unobserved substance not comprehensible in the our cognitive description. Our attempts, hence, to comprehend the world with our cognition is just kind of a confidence to enter the mystic world we have not known yet. It has been said that human DNA system consists of the combination of DNA cords A.G.C.T just like the combination of computer digital cords 0,1, giving much meaning to us. That is to say that we can't know completely the mystery of life. This scientific DNA study can't tell everything to the mystery of life. If we decipher one combination of DNA cords, the human DNA system makes up new combinations of Cords manifesting the much more mystic world. It is said that life is not just thing we are conscious of being alive but contains inorganic thing which contains life within life. So life has some peculiar energy to sustain on its own and hold its universe meaning which is marvelous and awesome to us.

합천 박실늪의 교란된 습지에서 식생의 회복 과정

김철수,오경환 경상대학교 환경보전연구소 1999 環境保全硏究所報 Vol.7 No.-

버들류 (Salix spp.)가 우점한 경남 합천군 박실지의 연안대에서 1997년과 1998년에 각각 3월부터 8월까지 인위적인 교란전·후의 식생구조와 토양환경을 조사하여 식생의 회복 과정을 밝혔다. 수생 및 습생 관속식물상을 비교한 결과, 교란 전에는 41과 91속 105종, 20변종으로 125종류, 교란 후에는 50과 119속 141종 24변종, 1품종으로 166종류가 각각 출현하여 종수가 증가하였다. 교란 전·후에 출현한 관속식물을 Swan (1970)의 기준에 따라 증가종 (increaser), 감소종 (decreaser), 중립종 (neutral), 침입종 (invader), 후퇴종 (retreater) 등의 5개 범주로 구분한 결과 전체 207종류 가운데 82종(40%)이 새로 나타난 침입종이고, 41종(20%)은 사라진 후퇴종으로서 모두 123종 (60%)의 종조성이 변화되어 식생 변화가 크게 나타남을 알 수 있었다. 교란 전·후의 생활형 조성은 Th-D_1-R_6-e형으로 동일하였고, 유사도지수는 CCs= 0.81 및 C=0.89이었으며, 종다양서지수는 2.45 및 2.52로서 약간 증가하였다. 교란 전·후의 토양 성분을 분석한 결과 pH는 5.14 및 6.18, 전기전도도 (㎛cm^-1)는 99.64 및 70.61, 유기물량 (%)은 2.17 및 1.46, 총질소량 (%)은 0.06 및 0.04, 유효인량 (mg/100g)은 0.15 및 0.08등으로서, 교란 후에 pH는 증가하였으나, 전기전도도, 유기물량, 총질소량 및 유효인량은 감소하였다. Vegetation structure and soil properties were investigated before and after artificial disturbance of willow forest to reveal the vegetative regeneration at the Parksil-nup wetland in Hapchoˇn-gun, Kyoˇngsangnam-do, Korea from March to August in 1997 and 1998. The flora of the undisturbed year was composed of 41 families, 91 genera, 105 species and 20 varieties or 125 taxa of the vascular hydrophytes and hygrophytes, and that of the disturbed year was 50 families, 119 genera, 141 species, 24 varieties and 1 form or 166 taxa of vascular plants, and total 207 taxa. Among 207 taxa, 82 taxa (40%) was classified as the invaders and 41 taxa (20%) as the retreaters by the Swan (1970). The biological spectra of the undisturbed and the disturbed year were same as Th-D_₁R_5-e. Similarity indices between the disturbed and the undisturbed years were CCs=0.81 and C=0.89, and species diversity indices (H') were 2.52 in the disturbed year and 2.45 in the undisturbed year. Sediment properties of the undisturbed and the disturbed year were pH 5.14 and 6.18, conductivity 99.64 and 70.61㎛ho㎝^-1, organic matter 2.17 and 1.46%, total nitrogen 0.06 and 0.04%, and available phosphrous 0.15 and 0.08 ㎎/100g, respectively. Conductivity, organic matter, total nitrogen, and available phosphorus decreased after the artificial disturbance.

사무직 근로자에서 직무스트레스 및 VDT작업과 목·어깨 근골격계 증상과의 관련성

이의철,김환철,정달영,김동현,임종한,박신구 대한산업의학회 2007 대한직업환경의학회지 Vol.19 No.3

볼트 접합된 반강접 보-기둥 죠인트에 대한 Component Method의 적용

양철민,김동환,김영문 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Beam-to-column joint transfer reactions from the beam to the column. When subjected to shear forces and in-plane bending moment, they deform, particularly in rotation. In other words, the primary distortion of a steel beam-to-column joint is its rotational deformation (θ), caused by the in-plane bending moment (M). Therefore, the joint behavior is substantially represented through M-θ, which is the most important input data for the analysis and design of semi-rigid frames. The study of the M-θ behavior of steel beam-to-column joints has increased dramatically. Several approaches to create nonlinear M-θ curves for various connection types have been used. In fact, even though simplified methods have been already developed for evaluating the rotational behavior of connections with angles, these models refer only to the behavior of the connection rather than to the joint as a whole, excluding the significant influence of the column components. The case of bolted connections with angles becomes even more complex than others. In this paper, a mechanical model to predict their M-θ curve is presented. To achieve this goal, the component method described in Annex J of Eurocode 3 (CEN, 1997) is used. Also, in order to verify the reliability of the component method, experimental test on bolted semi-rigid beam-to-column connection was conducted.

매복된 하악 제3 대구치 발치시 항생제 투여의 효용성

여환호,박주철,정종훈,강태호 大韓顎顔面成形再建外科學會 1999 Maxillofacial Plastic Reconstructive Surgery Vol.21 No.4

To evaluate the efficacy of antibiotic administration in the impacted mandibular third molar extraction the author investigated 107 patients requiring extraction of the lower third molar who visited at the Department of oral and maxillofacial Surgery. Chosun Dental Hospital and were healthy without medical problems and had no signs and symptoms of infection around the lower third molar. The patients were divided into 4 groups according to the method of antibiotics administration : 13 patients without antibiotics administration(group 1), 30 patients with only intravenous injection of Cefazoline 2.0g 30 minutes before the procedure(group 2), 39 patients with intravenous injection of Cefazoline 2.0g 30 minutes before the procedure and oral administration of follow-up dosages of Augmentin for 1 day(group 3), and 25 aptients with intravenous injection of Cefazoline 2.0g 30 minutes before the procedure and oral administration of follow-up disages of Augmentin for 3 day(group 4). Infection rates after extraction wer calculated and compared according to gender, the age of the patients, the level of impaction, and also compared between four groups. The results were as follows. 1. The overall infection rate was 8.4%. 2. The infection rate was higher in male(11.9%) than in female(4.2%), but there were statistically no significant differences between them. 3. Infection rate was lower in patients under age 30(7.2%) than in patients over age 30(12.5%), but there were statistically no significant between them. 4. Infection rate was higher in patients with complete bony impacted tooth(11.1%) than in patients with partial bony impacted tooth(6.5%), but there were statistically no significant differences between them. 5. Infection rate was 7.7% in group 1, 10.0% in group 2, 10.3% in group 3, 4.0% ingroup 4 and there were statistically no significant differences between groups. In summary, it is more important to extract the impacted lower third molar under aseptic condition and to minimize the injury of tissue if possible than to administer the preventive antibiotics in reducing the infection rate in healthy patients without medical problems who had no signs and symptoms of infection around the lower third molar.

무채색 영역과 유사색모집단을 이용한 주변 광원의 분광방사 추정

이철희,오주환 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(B)

본 논문은 채널로 입력된 영상으로부터 광원의 분광 방사 에너지 분포를 추정 할 수 있는 새로운 방법을 제안한다. 광원은 표면 반사(O(λ))에 대응하는 최대 무채색 영역(L(λ))의 반사되는 분광 방사 에너지 분포에 의해 추정된다. 3채널 영상으로부터 최대 무채색 영역의 분광 방사 에너지 분포를 획득하기 위하여 수정된 Gray-world assmption 알고리즘을 채택했다. 그리고 최대 표면 반사는 무채색 모집단으로 주성분 분석 방법을 사용해서 추정을 하였다. 무채색 모집단은 먼셀 컬러 색표에서 문턱값 보다 낮은 크로마 벡터를 사용해서 만들었다. 분리된 무채색 모집단의 제1에서 제3차까지의 누적 기여율은 약 99.75%이다. 무채색 모집단에 의해 광원의 분광 방사 에너지 분포의 재구성 그리고 여러 가지 광원 하에서 획득된 3채널 영상은 원본과 재현된 광원의 분광방사 에너지 분포를 RMSE에 의해 평가하고 실험 하였다.