優秀選手의 性格的 不適應에 관한 硏究

表內淑,趙榮濟 釜山大學校 附設 體育科學硏究所 1989 體育科學硏究所 論文集 Vol.5 No.-

This study was proposed to explore the present level of personal maladjustment in Pusan elite athletes. In order to achieve the purposed of the study 112 high school male and 68 university male students were selected by systematic sampling from the list of the students in Pusan elite athletes. They were asked for completing a questionnaire of Derogatics' Symptom Check List-go for personal maladjustment. The following conclusion were delineated. In Personal maladjustment, high school maleplayers showed higher personal maladjustment level than that of university male players on the whole. Among them, high school volleyball players, basketball players and university wrestlers showed the highest level of maladjustment personality.

種目別 運動選手들의 競技不安에 關한 調査 : 少年體典釜山市 代表選手를 中心으로 Centering on Representative Athletic Meeting of the Whole of Country Body and Girls in Pusan

表內淑,趙榮濟 釜山大學校 附設 體育科學硏究所 1988 體育科學硏究所 論文集 Vol.4 No.-

The purpose of this study is to develop the standard level of anxiety for competition, which can be effectively used to lessen the level of anxiety and then increase athletic performance in various categories of sports. For this study SCAT method developed by Martens was applied to 22 non players and to 88 players who were to participate in the athletic meeting of the whole of a country boys and girls. The results of my investigation summarized as follows; 1) The scores of SCAT difference wasn't between the groups of elementary school players and middle school players. But the groups of Handball player were t=2.94>t=2.58(p=0.01). The anxiety scores of the groups of middle school players were lower than those of elementary school players. The difference of the score is significant at the level of significance,1%. 2) In the groups of middle school players showed between Track and field players and non players, between swimming player and non players at the level of significance 5%. Namely, the anxiety score of the groups of Track and field and swimming players were higher than those of various categories of sports. 3) The score difference between the groups of individual sport players and that of team sport players showed significant at the level of significance 1%. In the groups of middle school player showed between the groups of individual sport players and that of team sport players were t=3.30>t=2.58(p=0.01). The anxiety scores of the groups team sport players were lower than those of individual sport players. The difference of the score is significant at the level of significance 5%.

세라믹/금속접합재에 대한 접합계면의 응력특이장해석

박영철,허선철,윤두표,강재욱 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.1

Since the ceramic/metal joints at high temperature, the residual stress will develops during when it is cooled from bonding temperature due to remarkable difference of thermal expansion coefficient betwen ceramic and metal. Moreover, the edge of jointed interface makes singular stress field in the ceramic/metal joints and this singular stress field much influences on the strength of joints. In this study, the influence of residual stress, mechnical load and repeat thermal cycle were estimated in the ceramic/metal joints. According to this influence, the change of singular stress field was analyzed. The results are as follow : 1) Strength of joints was evaluated by the stress singularity index λ and the intensity K of singular stress field. 2) the stress singularity index λ and the intensity K of singular stress field also increase as adding temperature of thermal cycle and its number of cycle. 3) In the case of mechanical load, the influence of residual stress reduces since the difference(Δλ) of stress singular index between existence and inexistence of residual stress decreases in proportion to the increasing of tensile load.

빔 구조물의 손상평가를 위한 임피던스 기술의 응용

홍동표,홍용,왕고평,김병진,김영문,이재정,김재열 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-

This paper presents a primary study for a new method of enhancing measurement using impedance analysis method, which is widely used for structure health monitoring. Many of skyscrapers, bridges, tunnels, which have been built up several years, and nearly reached their operating life due to aging crack, material deterioration, and so on. therefore, the health monitoring technique has obtained considerable attention. The goal of this research is to show basic information to evaluate structural health condition using piezoelectric sensors. The piezoelectric materials have various merits. It is easy to shape various forms and can be embedded on the materials more conveniently. Moreover, the excitation frequency can be changed and the piezoelectric sensors cost less. All these features make the piezoelectric-based system applicable to structural healthy monitoring. This work presents a study for the development of a practical and quantitative technique for assessment of the structural health condition by piezoelectric impedance-based technique associated with longitudinal wave propagation. To estimate the damage condition numerically, we suggest the evaluation method Cov (Covariance) and CC (Correlation Coefficient) in this paper.

鹽水中에서의 疲勞强度에 關한 硏究

李榮培,表東根,吳在一 弘益大學校 1985 弘大論叢 Vol.17 No.2

Since the fatigue strength of steel under the corrosive environment, corrode and fatigue at the same time, thus fatigue strength is lowered eminently by these effects. Also, the fatigue limit does not appear in artificial sea water, but appear in air. As the N? increases, the fatigue strength decreases accordingly. Therefore the fatigue designs of machinery or steel structures, which are used under the corrosive environment, must be limited life-design. The estimation of life is a very important factor. The purpose of this investigation is to obtain the saturated values of fatigue strength. We investigated the rotary bending test (cyclic rate: 0.5cpm) with smooth bar specimen of SM50B steel (JIS) in two different environments which are air and artificial sea water and compared with results concerning of the 7.5cpm under the same condition. The following results are obtained. 1) The fatigue life decreases by about 46% in artificial sea water in comparison with that in air. 2) S-N curves of 7.5cpm and 0.5cpm are same, so that we conclude, at the 0.5cpm is the saturated value of fatigue strength. 3) The ratio of fatigue strength decreases minutely by the number of cycle to failure increases. 4) In artificial sea water, the corroded oxidation occured in the location where the stress was concentrated.

Ad-hoc Network에서 동적 임계값을 이용한 부하균등 라우팅 프로토콜

이춘재,한욱표,정영준 강원대학교 정보통신연구소 2004 정보통신논문지 Vol.8 No.-

The bad balancing of a routing protocol in an ad-hoc network has been one of critical issues in perfomance determination due to the trade-off of a mobility and a transmission delay. SLAHSimpIe Load-balancing Ad-hoc routing Protocol) has considered the load balancing but it is lack of flexibiliy in traffc congestion and topology changes. In this paper, we present a load balancing routing protocol in the ad hoc nebyork, which uses dynamic thresholds for traffic congestion control and for adaptation of mobility and network changes. The proposed protoco1 has been simulated with GloMoSm and compared with ADOV, DSR, and SLASP, in respect with mobility, delay, and packet transmission.

NC 선반에서 직선 사이클 평면 위치결정 정도 측정 시스템의 구성

김영석,김재열,송인석,곽이구,정정표,한지희 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-

It is very important to measure linear cycle plane positioning accuracy of NC lathes as they affect those of all other machines machined by them in industries. For example, if the linear cycle plane positioning accuracy of each, axes directions is had, the accuracy of works will be wrong and the change-ability will be bad in the assembly of machine parts. In this paper, computer software systems are organized to measure linear displacements of ATC(Automatic tool changer) of NC lathes using linear scale and time pulses comming out from computer in order to get data at constant time intervals from the sensors. And each sets of error data gotten from the test is expressed to plots by computer treatment and the results of linear cycle plane positioning error motion estimated to numerics by statistical treatments.

관상동맥 풍선성형술 후 발생한 관상동맥 박리의 초기 조영술적 고찰

고영엽,강지인,장재혁,강민정,정중화,장경식,홍순표 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.1

Background and Objectives: Percutaneous coronary intervention (PCI) is widely utilized in the treatment of symptomatic coronary artery disease (CAD). Althouth it has numerous benefits, intimal tear or dissection, serious and potentially life-threatening complications of plain old balloon angioplasty (POBA) can occur. The aim of this study was to assess the implications of coronary dissections after ballon angioplasty. Methods: 78 consecutive patients (age, 62 +/- 11 years; 46 men, 32 women) identified to two groups as having with or without dissection (dissection (D) group or non-dissection (ND) grouP) underwent balloon angioplsty for CAD were studied. All patients with dissection could be managed by successful stent implantation to rescue the artery. The morbidity of ischemic complication and mortality were evaluated for 30days after PCI. Results: Coronary dissection developed 44 lesions (38%) in 31 patients out of 117 lesions in 78 patients after POBA and a good final angiographic result was obtained in all patients with dissection, Significant correlates of a development of dissection were the lesion morphology of ACC/AHA type B and C (P<0.05). There were no significant correlations of clinical pictures, whether POBA in single vessel disease or in multivessel disease, diameter stenosis before POBA, and balloon/coronary artery diameter ratio. Morphologic feature of dissection was type A in 15 (34%), type B in 13(30%), type C in 12 (27%), and type D in 4 (9%). After PCI, there was no ischemic complication or death related coronary dissection during follow-up period for 30days. Conclusions: Coronary dissection after angioplasty occurred in 44 lesions (38%) out of 117 lesions of 78 consecutive patients underwent POBA. Coronary dissection after POBA significantly correlated with the severity of lesion morphology. Coronary stenting is effective in the management of acute coronary dissections after angioplasty.

효율적인 군 전직지원체제 정립 방안

정철영,고재관,황원채,윤희철,박가열,김재호,이성식,김동승,표성일,이건남,양안나,최수정,김은석 한국직업능력개발원 2008 직업능력개발연구 Vol.11 No.1

이 연구의 목적은 제대군인에 대한 효율적인 전직지원을 위해서 현행 전직지원 프로세스에 대한 개선 안과 이에 따른 국방부, 국가보훈처 등 제대군인 전직지원관련 기관 간의 역할분담 및 연계방안에 대해서 제안하는 것이다. 연구는 크게 세 가지 과정을 거쳤다. 첫째, 국내 군 전직지원 실태를 분석하여 문제점과 시사점을 도출하였다. 둘째, 이러한 문제점과 시사점, 군 전직지원 선행연구를 종합하여 효율적인 군 전직지원 프로세스 안을 제시하였다. 셋째, 구축한 군 전직지원 프로세스 안에 따라 주요 군 전직지원 관련 기관인 국방부, 국가보훈처의 역할 분담 안을 제안하였다. This study aims to suggest an improvement plan for the support process of effective occupation change for discharged soldiers and then role assignments among related institutions for supporting discharged soldiers such as Ministry of Defense, Ministry of Patriots and Veterans Affairs, Ministry of Labor and the cooperation plan among the institutions. The study was made in three steps. First, after analyzing currents support facts and status for discharged soldiers, it induced its problems and implications. Second, integrating the findings of previous studies related to support plan on occupation changes for the discharged soldiers, Problems and implications mentioned above, it constructed effective occupation change process for discharged soldiers. Then, according to the established process, it suggested role assignments such as Ministry of Defense, Ministry of Patriots and Veterans Affairs, Ministry of Labor.

구개골내 정중치에서 발생한 함치성낭종 1례

조원표,김재영,서경식 건국대학교 의과학연구소 1995 건국의과학학술지 Vol.5 No.-

Dentigerous cyst may occur any place around jaw. Dentigerous cyst can develop from unerupted tooth, and cyst from supernumerary tooth is rare. Among dentigerous cyets, palatal dentigrous cyst from a mesiodens is a very rare case. So we report a large(2.5×2.5㎝) dentigerous cyst arising from a mesiodens which was found at left premaxillary area eroding palate, premaxilla, nasal floor and roots of left upper central and lateral incisors. En bloc enucleation of the cyst was performed and the large bony defect was filled with antibiotic and thrombin-impregnated Gelfoam. The incision site was closed with meticulous water-tight interrupted 5-0 nylon sutures. We report with follow up CT scans after 4 months. So far as we have followed up the patient, filling the bony defect with thrombin and ??, a absorbable gelatin sponge revealed a good tissue replacement material.