CORBA 기반의 분산 오디오/비디오 스트림 서비스 프레임워크의 설계 및 구현

박세철,김종현 동의공업대학 2001 論文集 Vol.27 No.1

This paper presents a design and implementation of a distributed audio/video stream services based on CORBA distributed objects and JMF(Java Media Frameworks). Our design abstracts software components concerning the processing of audio/video streams as distributed objects. And we separate the transmission path of control data and media data for efficient stream transfer. CORBA RPC calls are used as control signals such as connection establishment, call control, device control. But media streams are transmitted by a RTP(Realtime Transport Protocol) directly. Distributed objects are designed by IDL(Interface Definition Language) and implemented using Java and various JMF components. We show a connection establishment and flow control procedure of streams. And we introduce an implementation environments and evaluate a performance.

尋常性白斑에 對한 8-Methoxypsoralen 局所療法

李世鎭 醫藥係社 1960 綜合 醫學 Vol.5 No.3·4

슬관절 전치환술시 슬개골 비치환술

조세현,정운화,천충우,윤영필 대한슬관절학회 2002 대한슬관절학회지 Vol.14 No.2

슬개골-대퇴골 관절의 합병증은 슬관절 전치환술 후 가장 흔한 합병증 중의 하나로, 이런 합병증을 예방하기 위해 슬관절 전치환술 시 슬개골을 치환할 것인가, 아니면 보존할 것인가에 대하여 아직도 많은 논란이 되고 있다. 1993년 8월부터 200년 8월까지 퇴행성 관절염 및 류마티스 관절염으로 슬개골 치환을 하지 않고 인공슬관절 전치환술을 시행한 환자 중 2년이상 추시가 가능했던 36명, 43례를 연구대상으로 하였다. 전례에서 슬개골의 퇴행성 변화에 관계없이 슬개골 보존술(즉 슬개골을 치환하지 않고 슬개골 성형술만 실시함)을 시행하였으며, 추시 기간은 최단 2년에서 최장 10년으로 평균 54개월이었다. 수술전 슬개골의 방사선 사진으로 정상 슬개골을 A군 (10례), 중등도의 퇴행성 변화를 B군 (20례), 심한 퇴행성 변화를 C군 (13례)으로 분리하여 세군의 슬관절 전방부 동통, 운동범위, 계단 오르기 능력 등의 임상적 소견과 슬개골 경사(patellatilt) 및 외측 슬개골 전위(lateral patella shift)의 두 가지 방사선사학적 소견을 비교 분석하였다. 35명중 퇴행성 관절염이 29명, 류마티스 관절염이 6명였으며, 임상적 분석은 American Knee Society Score(KSS)를 사용하였다. 최종추시시 평균 Knee Society Score (KSS)는 A군 93.1점, B군 92.7점, C군 94.2점이었다. 총 43례중 슬관절 전방부 동통을 호소한 예는 A군 2례, C군 2례로 4례 (9.3%)뿐이었으며, 이들은 보행 시는 동통이 없으나, 쪼그린 자세나 계단을 오르내릴 때 동통을 호소하였다. 세군간의 슬관절 운동범위, 계단 오르기 능력 등의 비교에서는 유의한 차이가 없었으며, 방사선학적 비교에서 외측 슬개골 전위는 유의한 차이가 없었고, 슬개골 경사는 A군과 B군에서는 유의한 차이가 없었으나, C군에서는 유의하게 차이가 있었으므로 술전 슬개골의 퇴행성 변화가 심할수록 슬개골 경사가 증가됨을 알 수 있었다(p=0.01). Patello-femoral problem is one of the common complications in total knee arthroplasty and whether to replace the patella or retain it has long been controversial in order to prevent the complications. 43 cases (35 patients) of total knee arthroplasty with patellar retention performed by single surgeon between August 1993 and August 2000 were reviewed retrospectively. The follow-up period averaged 54 months (range, 24-120months). The whole cases were divided into three groups according to the preoperative radiographs. Group A was normal patella (10 knees), Group B was borderline arthritic patella (20 knees), and Group C was severely deformed patella (13 knees). All of 43 knees, regardless of preoperative radiological degree of arthritis received patelloplasty including removal of osteophytes, subchondral shaving and lateral retinacular release was performed in 20 knees (47%). Each groups was evaluated in terms of the objective criteria of anterior knee pain, range of motion, stair climbing ability, and roentgenographic findings. All 35 patents were diagnosed as osteoarthritis in 29 and rheumatoid arthritis in 6. American Knee Society Score (KSS) was assessed for the clinical analysis and lateral patella shift and patella tilt were assessed for roentgenographic analysis. The mean Knee Society Score at final follow-up was 94 in group A, 93 in group B, and 94 in group C. Mild anterior knee pain was reported in 9.3% (Group A: 2 cases, Group C: 2 cases). patellar tilt was significantly higher in C group (oneway ANOVA test, p=0.01), representing that advanced patello-femoral arthritis caused increased patellar tilt. There was nither significant difference in terms of range of motion, and stair climbing ability nor of patellar shift among all three groups. TKA with patelloplasty, not resurfacing the patella, provided satisfactory results without significant problems regardless of the preoperative degree of patello-femoral arthritis.

웨이트 트레이닝과 에어로빅 트레이닝이 비만 여중생의 생리적 변인에 미치는 효과 비교

김세환 강원대학교 체육과학연구소 2000 江原大學校附設體育科學硏究所論文集 Vol.- No.23

The purpose of this investigation was to determine the effects of low intensity circuit weight training on physiological variables such as body composition, blood lipid profile and cardiopulmonary function in obese middle school girls. Thirty obese middle school girls (%fat>25%) were divided low intensity into weight training (CWT; n=10), aerobic training(AeT; n=10), and control(CTL; n=10) groups. The participants in the training groups had trained 50 min each day three times pre week for 10 weeks. The results were summarized as the follows: 1.Anthropometry and body composition The height(P<.01) increased significantly. Although the body weight did not show statistically significant changes, it decreased. W/H decreased 11.34%, even though it was not statistically significant increase in LBM. After the 10-week training, there were no significant differences between the CWT and AeT groups in all the variables related to body composition. 2.Blood lipid profile There was a significant decreases in all blood lipid profile. With 10-week training, there was significant difference in TC and TG between the CWT and CTL groups, However, there were no significant difference between the CWT and AeT groups in all the blood lipid profiles. 3.Cardiopulmonary function There was a significant increase in VO2max/kg. There were significant differences between the CWT and CTL groups in VO2max/kg and VO2max/LBM. However there were no significant differences between the CWT and AeT groups. HRrest and Hrmax did not change signicantly. With 10-week training, did not result in significant difference between the groups in all the cardiopulmonary function variables

사출조건 변화에 따른 기계적 성질의 영향에 대한 금형설계 및 제작에 관한 연구

민세홍,임기창 경원전문대학 1999 論文集 Vol.21 No.-

Injection molding technique is directly related to high quality, low cost which customer needs. Injection molding process is very importantly dealt with the sharp increase of resin consumption and so is studied very actively nowadays. The influential factors to injection molding parts are material melting temperature, mold temperature, injection speed, injection pressure melting temperature are especially important. The boundary and contents of research and development are design injection molding making test specimen of KS rules, manufacturing injection mold, injection varied on mold temperature, injection pressure and melting temperature, mechanical properties injection test specimen, and analysis of test. In this study the specimen for tensile and impact strength tests were made under various cylinder and mold temperatures. Measurements were done to find optimum region of mechanical strength through the tests. And me found that mechanical strength decrease by increasing mold temperature and decreasing melting temperature. Therefore if the molding process is done under the optimum injection characteristics of resin for the final parts can by optimized as well as formability.

청소년의 생활습관이 대뇌각성수준에 미치는 영향

김근국,김세환 江原大學校附設體育科學硏究所 1994 江原大學校附設體育科學硏究所論文集 Vol.- No.18

The purpose of this study was to examine effects of adolescents' life styles, such as sleeping and meal patterns, on their arousal level in school. The experiment was conducted on a sample of 253 male students, 202 first graders and 51 third graders in junior high schools. The Korean edition of "A self assessment questionnaire to determine morningness-eveningness," originally prepared by Horne and Ostberg, was used to judge the morningness or the eveningness of the students. In order to check the validity of the questionnaire, the students' body temperatures from 7 : 00 a. m. to 12 : 00 p. m were taken, and the presence of a difference in fluctuations of the body temperatures between the morningness group and the eveningness group was confirmed. Their life style were surveyed using a our-own made questionnaire, while their arousal levels were measured by the Flicker test. Between the morningness group and the eveningness group, their are statistically significant differences in the patterns of rising (P<0.05), the appetite in the morning (P<0.05), and physical and mental conditions (P<0.01), Especially, the morningness group shows a significantly higher arousal level during schooltime from 9 : 00 a. m. to 4 : 00 p. m. than the eveningness group. Comparison of life styles of the groups shows that students in the eveningness group the tendencies to stay up till late, get up without recovering from their fatigue, and suffer from loss of appetite when they begin their daily work in the morning. Further, since the eveningness group shows a much lower arousal level in school than the morningness group, it seems that a special care should be paid to the former group not only for the enhancement of the efficiency in their learning but for prevention of various possible accidents. As a results, persistent and good guidance is required to lead adolescents to a sound life style.

세팍타크로 경기의 공격기술과 공격포지션에 따른 성공률 분석

김석주,김세환 江原大學校附設體育科學硏究所 2003 江原大學校附設體育科學硏究所論文集 Vol.- No.26

The purpose of this study is to expand the base of population for Sepaktakraw, through enhancing an interest in the event of Sepaktakraw, to seek for a scientific and systematic training method, by particularly finding out which attack-skill type and attack position are more important among competitions, and to obtain the reference data helpful to coaching a player such as the enhancement of sports performance and the operation of competitions. Aiming to achieve this goal of a study, targeting players who did take part in the competitions of Sepaktakraw by event for men and women nationwide, 1) it did analyze the attempt rate and success rate for male and female players depending on an attack-skill type, 2) it did survey and analyze the attempt frequency, attempt rate, success frequency and success rate depending on the attack position (a left striker, a right striker), thus it did obtain the conclusions as follows. First, as a result of analyzing the attempt rate and success rate depending on a type of attack skills, in terms of a type of attack skills, it was shown to be highest in the attempt rate and success rate of scissors spike, as for both men and women, and it was shown to be the highest in the attempt rate and success rate of rolling spike as to high-school division by event for men. Second. as a result of analyzing the attempt rate and success rate depending on attack positions, in terms of attack positions, it was shown to be highest in the attempt rate and success rate of right-striker attack, as for both men and women, and in relation to right-striker attack. the high-school department was shown to be higher in the attempt rate and success rate than the university division and the general division, in any event for men.

생리 중 수업태도에 따른 체육수업 기피요인

이병화,김세환 江原大學校附設體育科學硏究所 2002 江原大學校附設體育科學硏究所論文集 Vol.- No.25

My researching targets are the girls' high school students. The objects of my research are to grope out the improvement course of the effective physical education guidances as examining the avoiding factors closely and classifying, studying and analyzing the attitudes in the physical education classes with two variables - the independent variable, dependent one. The former is the participating attitudes in the study hour under the menstruation. The latter is the main factors such as physical, characteristic, psychological, athletic items and facilities and teacher's factor. The conclusion is as follows. 1. Physical factor- The more active the students are in the class attitude under the menstruation, the more they are influenced by the physical pains, everyday life, schoolwork and physical activities. 2. Characteristic factor - the extrovert students have a tendency to be passive in the studying attitude. 3. Psychological factor - the menstruating students who are participating actively in the class tend to feel much anxiety. 4. Factor of the athletic items - the menstruating students who are participating actively in the class tend to be hindered in the factor of the athletic items and facilities. 5. Teacher factor - the menstruating students who are participating actively in the class would like to go to the nursing room and take part in the light exercises

남자 중학생의 24시간 에너지 소비량에 관한 연구

이상건,김세환 江原大學校附設體育科學硏究所 1997 江原大學校附設體育科學硏究所論文集 Vol.- No.21

This is study was to provide the basic data for improving the health problems following life style change of teenagers. I examined the life time and energy of 18 middle school students on the third grade according to the measurement of oxygen intake and heart rate for 24hors with dividing them into group : attending-to-school-by-bus group (belows B-group), on-foot group (F-group), by-car group (A-group), and by-bicycle group (C-group). the results were as follows : 1) Energy expenditure for one day of B-group was 2443㎉, that of F-group was 2597㎉, that of A-group was 2282㎉, that of C-group was 2860㎉ and so, 2546㎉ as average. 2) Energy expenditure per weight of B-group was 39.6㎉, that of F-group was 42.7㎉, that of A-group 34.6㎉, that of C-group was 51.5㎉ and so, 42.1㎉ as average. 3) Energy expenditure per minute for each kind of activity was P < 0.003 only when going to school and differed from group to group. 4) Heart rate for one day of B-group was 83.8beats/m, that of F-group was 75.3beats/m, that of A-group was 82.2beats/m, that of C-group was 81.9beats/m, and so, 80.0beats/m as average. 5) Heart rate for each kind of activity was P < 0.001 only when going to school and differed from group to group. 6) Time for each kind of activity did not differ from group to group and the middle school students on the third group has similar life patterns. 7) Energy expenditure for each kind of activity differed from group to group only when going to school (P < 0.005) and coming back home(P < 0.05). 8) It was the studying time at home and also in school that mostly effected on the energy expenditure for one day of the middle school students and related as 49% of the whole. This study examined only energy expenditure and so, in other to collect the data for improving the health problems, it needs to examine the energy intake and much more objects.

체육고등학교 남학생의 에너지 발란스에 관한 연구 : 육상선수를 중심으로

조희신,김세환 강원대학교 체육과학연구소 2001 江原大學校附設體育科學硏究所論文集 Vol.- No.24

The athletic high-school was established to discover young players having good character early, bring them up to good players by scientific training program and related guide, to develope athletics of local society and enhance national glory finally(1982, Department of Sports). The capacity of energy-consuming is an element that decides athletic ability. Adoption of large-energy is caused to growing corpulent, so athletic ability is decreased. Also adoption of little-energy becomes stoppage-factor of training. If that is so, this research produces several conclusions and opinions to provide an athlete, especially students of athletic high-school, with a criterion of nutrition-supply. (The object of this research is students of K-athletic high-school ) 1)All capacity of energy-adoption per a day is 4349±513kcal, capacity of energy-adaption per a kilogram is 60.24±7 kcal. 2)All capacity of energy-consuming per a day is 4553±491 kcal, capacity of energy consuming per a kilogram is 63.81±14 kcal. 3)The time, students consumes energy most, is in exercise. At this time, the capacity of energy-consuming is 2084±613kcal. 4)The average of the HR per a day is 73 per a minute. When students take exercise, HR is 107 per a minute and is fastest. 5)The relation between 'all capacity of energy-adoption per a day' and 'all capacity of energy-consuming per a day', namely energy-balance, is 0.959. The result shows (-). This result means 'all capacity of energy-consuming per a day' is more than 'all capacity of energy-adoption per a day', but it is difficult to say "this result is energy-unbalance." These are several opinions, based on above conclusions, about the nutrition-condition of K-athletic high-school students. 1)'All capacity of energy-consuming per a day' is more than 'all capacity of energy-adoption per a day', but it is possible to say "Nutrition-balance of K-athletic high-school students is normal." 2)So, students have to adopt more, 10% of 'all capacity of energy-consuming per a day'. The reason is that students of K-athletic high-school are in growth period, so students need capacity of energy-adopting used in order to grow up, only so students is in nutrition- balance. 3)I think that 'The proper capacity of energy-adoption per a day' of K-athletic high-school students is 'all capacity of energy-adoption per a day', 4349±513kcal, and 10% of 'all capacity of energy-adoption per a day', RDA is 5000 kcal. (but, this is not applicable to all sports.) 4)The capacity of energy-consuming in this research is more than preceding research This result means the exercise of students of K-athletic high-school is too much.