1998년과 2007년 사이 12∼13세 남녀 청소년의 체격, 골격성숙도, 체력 비교

송종국(Jong Kook Song),채서연(Seo Yeon Chae),채주희(Joo Hee Chae),김현배(Hyun Bae Kim),강효정(Hyo Jung Kang) 한국사회체육학회 2008 한국사회체육학회지 Vol.0 No.34

The purpose of the present investigation was to compare physique, skeletal maturation and physical fitness in Korean adolescents measured between 1998 and 2007. Subjects participated in the study were a total of 473 Korean adolescents aged 12 to 13 years. In 1998, 349 adolescents were selected from a middle school, located in Sungnam city and 124 middle school students aged 12-13, located in Yongin city were participated in 2007. All measurements were conducted by one of the reseachers (Jong-Kook Song) with two different group of investigators between 1998 and 2007. Anthropometric characteristics were body mass, body height, sitting height, circumferences taken at sites of upper arm, flexed upper arm, chest, waist, hip, thigh, and calf, bone breadth taken at the sites of humerus, and femur, skinfold thicknesses taken at the sites of triceps, subscapular, suprailiac, thigh and medial calf. Skeletal maturity was assessed by TW3 (Tanner et al., 2001). Maturity scores for Radius-Ulna-Short bones (RUS) and bone age were calculated. Physical fitness parameters included flamingo balance, sit and reach, grip strength, sit-ups, standing long jump, bent arm hang, 50m shuttle run and multi-stage shuttle run. All data were analyzed by SAS Enterprise 3.0. Means and standard deviations were calculated by descriptive statistics. Independent t-test was applied to compare dependent variables between measurements. The level of significance was set at p<0.05. Results of the study showed that male adolescents aged 12-13years in 2007 had significantly higher (p<0.0001) femur diameter than adolescents in 1998. Male adolescents in 2007 had higher (p<0.05) chest, waist and calf circumferences than those of adolescents in 1998. Although no difference were found for RUS and bone age in males adolescents between 1998 and 2007 female adolescents in 2007 were significantly delayed for their skeletal maturity level compared to female adolescents in 1998. For physical fitness parameters male adolescents aged 12 years in 2007 performed better for flamingo balance (p<0.01), and 50m shuttle run (p<0.05) than those of adolescents in 1998. However, stand long jump and bent arm hang were significantly decreased in male adolescents in 2007. Female adolescents aged 12-13 years in 2007 had significantly higher flamingo balance, but female adolescents aged 12 years in 2007 performed significantly less for standing long jump (p<0.0001), bent arm hang (p<0.001) and speed (p<0.05) than those of female adolescents in 1998. In conclusions this study suggest that chest circumference for both male and female adolescents in 2007 was significantly higher than those in 1998. Skeletal maturity for female adolescents in 2007 were significantly delayed compared to female adolescents in 1998. Further study is needed to evaluate consistent various.

Hepatic Cirrhosis Occurring in a Young Woodchuck(Marmota monax) Due to Vertical Transmission of Woodchuck Hepatitis Virus(WHV)

Kyu-shik Jeong,정원일,Jae-yong Chung,Mi-young An,Chae-yong Jung,Gyoung-jae Lee,Jong-soo Kang,Byeong-cheol Kang,Young-heun Jee,Bruce H Williams,Young-oh Kwon,Da-hee Jeong 대한수의학회 2003 Journal of Veterinary Science Vol.4 No.2

Cirrhosis Occurring in a Young Woodchuck (Marmota monax) Due to Vertical Transmission of Woodchuck Hepatitis Virus (WHV)Da-hee Jeong, Won-il Jeong, Jae-yong Chung, Mi-young An, Chae-yong Jung, Gyoung-jae Lee1, Jong-soo Kang1, Byeong-cheol Kang2, Young-heun Jee3, Bruce H Williams4, Young-oh Kwon5 and Kyu-shik Jeong*College of Veterinary Medicine, Kyungpook National University, Daegu 702-701, Korea1Shinwon Scientific Co., LTD, Research Institute, Suwon, Korea2Clinical Research Institute, Seoul National University, Seoul 110-744, Korea3College of Veterinary Medicine, Jeju National University, Jeju 690-756, Korea

Fibrous Glass Board의 열전도도 측정

채희백,김종철 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.1

FIbrous glass board is widely used for the heat-insulation material. Thermal conductivity of these material is low. NIST prepared the cirtified reference material which is used for the comparison and verification of the apparatus for thermal conductivity measurements Guarded hot plate method is used to measure thermal conductivity and the results are compared with NIST data. Heat conduction path has three modes, such as through the fiber glass itself, air between the fiber and by radiation. The apparent thermal conductivity of fiber glass board 1450b is 3.5~4.2x10-2 W/m K in a temperature range from ambient to 345K. It's in agreement with NIST data within ±1.5%.

1995년도 대구지역 법의 부검 통계

채종민,이숙희,정민희,곽정식 大韓法醫學會 1996 대한법의학회지 Vol.20 No.1

This is a statistical observation by authors based on data of deaths brought to department of forensic medicine, Kyungpook National University School of Medicine for medicolegal autopsy by all of law enforcement agencies in Taegu area during the year of 1995. The report aims to reveal facts on various causes of death in Taegu area in attempt to analyse 205 cases statistically. The following are the summary of results ; 1. The total numbers of autopsy were 205 cases, of these 121 cases (58%) were males and 83 cases (40%) were females. 2. The violent deaths were 135 cases (66%) and the natural deaths were 63 cases (31%) and unknown cases were 7 (3%). 3. The percentage of autopsied cases with 30's age group was 28.2% (the most), 20's was 17.2%, 40's was 13.8%, 10's was 13.8%... in violent deaths. The percentage of autopsied cases with 30's age group was 31%, 40's was 20%, 20's was 20%, 50's was 15.5%...in natural deaths. 4. For the violent deaths, the percentage deaths due to injury was 52.9%, asphyxia was 29.8%, intoxication was 10.4% and abnormal temperature(hypothermia or fire) or electrocution was 6.7%. 5. For deaths due to injuries, the percentage of deaths due to blunt injury was 45.7%, sharp force injury was 29.5%, fall was 17.1%. and traffic accident was 7.1%. 6. For the natural deaths, 60 cases were recorded and the death due to the disese of the cardiocascular system was taking the most of the total percentage with 53%. 7. For deaths due to injuries, the percentage of accidental death was 57.3%, homicide was 22% and suicide was 14.7%. 8. 31 subjects (51.7%) of 128 violent deaths have positive blood alcohol concentrations (0.05% and above) , and 8.1% of natural deaths were associated with alcohol intake. 9. For deaths by medical dispute, 7 cases were recorded and deaths combined with operation were taking the most of the total percentage with 43%.

무릎골절 환자에 발생한 폐동맥의 안장 색전증 : An autopsy case report

정민희,채종민,곽정식 大韓法醫學會 1996 대한법의학회지 Vol.20 No.1

Pulmonary embolism is a complication principally in patients already suffering from some underlying disorder, such as cardiac disease or cancer, or who are immobilized for long periods. It appears to be particularly a disease of modern developed and industrialized countries. The incidence if believed to be much lower in African and Asian populations than in the Western world. Sudden death often ensues, owing largely to the blockage of blood flow through the lungs. Because of the rarity of the incidence, it seems worthwhile to present an example studied at autopsy. Pulmonary embolism was associated with sudden death in a hospitalized patient who was immobilized for long periods after fracture surgery. There was a large embolus from deep femoral vein lying at bifurcation of main pulmonary arteries, extending into left and right branches.

자기 소호형 소자를 사용한 D급 고주파 인버터의 특성 평가 및 설계에 관한 연구

노채균,김동희,김종해,배영호 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2

This paper investigates and compares operating characteristics of the main power conversion circuit and extension of safety operating zone etc in case of use switching device of voltage-fed type high frequency Inverter with self-turn-off device to a case of using nature-commutated type devices. In addition, this paper induced operating characteristics of the main power conversion circuit by examination to normalized parameter. This paper propose that a base data of the main power conversion circuit of characteristics evaluation for frequency characteristics, output characteristics and load characteristics etc.

ZVS를 이용한 SEPP 고주파 공진 인버터의 특성해석

김동희,노채균,김종해,민병재,배상준 嶺南大學校 工業技術硏究所 1997 工業技術硏究所論文集 Vol.25 No.1

Applied the high frequency switching technology to the ower conversion circuits, the turn on and off loss of switch point out practically large the point at issue, in order to reduce switching loss, the switching method using tank resonant circuit be connected serial and parallel with load have been continuously investigated. This paper was described about principle and form of proposed circuit made use of soft switching technology ZVS(Zero Voltage Switching) and ZCS(Zero Current Switching) to reduce turn on and off loss at switching. Also, the analysis of the proposed circuit is described generally by using normalized parameter and basic operating principle and driving characteristics have been evaluated as to switching frequency and load parameter. Based on the charactristics value, a method of circuit design is proposed. In addition, Pspice's simulation and experimental waveforms are compared with theoretical ones. The experimental results shows that the proposed Inverter can be used practically such as power source system for induction cooker etc.

소아에서의 Nd : YAG Laser를 이용한 치은착색제거술 YAG Laser in children

모경희,박헌동,박종휘,김효석,정현구,설재헌,이병채 조선대학교 구강생물학연구소 2003 口腔生物學硏究 Vol.27 No.1

Melanin is normally found in the skin of all people, and normal pigmentation of the intraoral tissues is a relative frequent finding. Gingival hyperpigmentation may cause esthetic problems and embarrassment, especially in patients with a gummy smile. Melanin pigmentation is related to etiologic factor such as hormon, systemic factor, drug, smoking and gingival inflamation. Depigmentation procedure can be Performed by gingival epithelium removing procedure, gingivectomy, free gingival graft, laser therapy, dry ice, Vitamin C and phenol-alcohol method. We could obtain favorable esthetic results by procedures such as Nd: YAG laser. The Nd:YAG laser was set at 4 watt, 50mJ, 80 pulse per second. The procedures were performed with contact mode in all pigmented areas by using a handpiece with a 320㎛ diameter fiber optic. Ablation of the gingival hyperpigmented gingiva appeared healthy, pink, and firm. No recurrence of hyperpigmentation had been found in 6 months of follow-up.

초등학교 초임교사의 교과지도 경험에 대한 내러티브 탐구

김재춘,박정순,박정순 이화여자대학교 사범대학 교육과학연구소 2010 교육과학연구 Vol.41 No.1

이 연구는 초등학교 초임교사가 ’교사되기’의 길을 걷는 과정에서 어떤 교과지도 경험을 하는지, 교과지도 경험은 어떻게 성장하는지를 파악하기 위한 것이다. 이를 위해 2007년 9월 1일자로 발령받은 초임교사 두 명에 대해 2009학년도 1학기까지 2년간에 걸친 내러티브 탐구를 통해 두 초임교사의 교과지도 경험을 연구하였다. 2년간의 교과지도 경험을 통해 김 교사가 깨달은 것은 다음과 같았다. 첫째, 교과지도는 재미와 학습목표 달성간의 균형을 필요로 한다. 둘째, 공개수업은 보여주기 위한 수업이 아니라 수업 후 피드백과 반성을 통해 자신의 수업을 개선하기 위한 활동이다. 셋째, 수업은 실수를 반성하고 고민하면서 자란다. 동일한 2년간의 교과지도 경험을 통해 초임교사인 이 교사가 깨달은 것은 다음과 같았다. 첫째, 학교교육은 학원교육과의 차별화를 꾀해야 되며, 그렇게 하기 위해서는 교사들의 해당 교과에 대한 전문성을 기를 필요가 있다. 둘째, 초임교사로서 고학년 담임은 명확한 원칙과 뚜렷한 주관이 없으면 학생들에게 휘둘리게 된다. 셋째, 제대로 된 교육은 학습할 내용의 결과나 공식만을 기억하도록 하는 것이 아니라 학습할 내용의 의미와 원리를 파악하도록 가르치는 것이다. 초임교사는 교사되기의 과정에서 첫째, 예기치 못한 문제와 대면하는 단계, 둘째, 시행착오 하는 단계, 셋째, 고민과 개선의 노력을 통해 자신만의 방법을 찾아가는 단계를 거쳐 교과지도 능력을 성장시켜 가는 것으로 나타났다. This study sought to understand two newly-appointed teachers' experiences in elementary schools through narrative inquiry. The research findings are as follows: After two years of teaching in an elementary school, the first teacher came to realize three things. First, a balance between fun-seeking and goal- oriented concerns can be achieved through educational activities. Second, teachers open classes to parents and the public not to show off their teaching competence, but to improve their abilities through feedback from parents and others. Third, new teachers' instructional competence can grow through making mistakes, reflective thinking, and problem-solving. After two years of teaching, the second teacher also came to realize three things. First, teaching in schools should be differentiated from teaching in hagwons, and such distinction should be based upon teachers' improved teaching competence. Second, teachers who are in charge of upper grades could be influenced by students' opinions apart from their own philosophy and principles of teaching. Third, meaningful teaching in schools involves helping students understand the meaning and fundamental principles of what they are learning, not merely learning by rote.

LSD 설계법을 이용한 합성보 설계의 경제성에 관한 연구

朴鍾圓,蔡淑熙 홍익대학교 산업기술연구소 2000 産業技術 Vol.10 No.-

Use of the Limit State Design may have an economy over the Allowable Stress Design especially in the design of composite beams. In this study, strength and serviceability limit states are checked using the two methods and the differences in the design methodologies are compared. The investigation shows that as spans increase, designs by the LSD method give lighter beam weights and require fewer shear connectors resulting in substantial savings in material costs.