온라인 태권도 품새대회 참여자의 참여동기가 스포츠 태도 및 운동지속의도에 미치는 영향

이정학(Lee, Jeoung-Hak1),김도엽(Kim, Do-Yeop),최경환(Choi, Kyung-Hwan),조혜경(Cho, Hye-Kyung) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.3

This research aims to provide basic data for the revitalization of online Taekwondo Poomsae Games and the increase of the population of Taekwondo trainees by understanding the impact of participation motivation on sports attitude and exercise duration. The online questionnaire was distributed to participants of the online Taekwondo Poomsae competition, and a final analysis of all 283 copies of the data was conducted. The data processing methods are frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, and multiple regression analysis using SPSS 22.0. The results and discussion conclusions are shown below. Firstly, the motivation to participate in the online Taekwondo Poomsae competition had a positive effect on the physical, social and emotional attitude. Secondly, the motivation to participate in the online Taekwondo Poomsae competition had a positive impact on the continuity of the movement. Thirdly, the attitude of the online Taekwondo Poomsae competition has had a positive impact on the continuity of the exercise.

적층형태 및 보강방향에 따른 복합적층판의 종방향 모멘트 무시효과

이봉학,홍창우,이정호,김경진 江原大學校 産業技術硏究所 1998 産業技術硏究 Vol.18 No.-

The most of the design engineers for construction has academic background of bachelors degree. Theories for advanced composite sturcutures are too difficult for such engineers and soe simple but accurate enough methods are necessary. The senior athor has reported that soke laminate orientations have decreasing values of D?, B?, D? and B? stiffnesses as the ply number increases. Such plates behave as special orthotropic plates and simple formulas developed by the author can be used. Most of the bridge and building slabs on girders have large aspect ratios. For such cases further simplification is possibe by neglecting the effect of the longitudinal moment terms(M?) on the relvant partial differential equations of equilibrium. In this paper, the result of the study on the subject problem is presented.

제4경추의 형태와 초경을 통한 성숙지표에 관한 연구

이규홍,황용인,김윤지,박양호,백승학,차경석 대한치과교정학회 2008 대한치과교정학회지 Vol.38 No.1

본 연구는 측모 두부 규격 방사선사진을 이용하여 성장 중인 아동의 제4경추 형태를 경추 몸체부 하연의 만곡 정도에 따라 분류하고 초경의 시기와 수완부 골 성숙 단계를 평가하여, 성장 중인 아동의 골격적 부정교합의 진단 및 악정형 치료를 위한 성장 시기 평가에 제4경추의 형태 변화가 진단의 참고자료로 활용될 수 있는지를 연구하였다. 11-14세 여자 환자 중, 같은 날짜에 촬영된 측모 두부 규격 방사선사진과 수완부 방사선사진이 모두 있는 81명을 대상으로 환자의 측모 두부 규격 방사선사진상 제4경추 몸체부 하연의 만곡 정도에 따라 세 그룹으로 분류하였다. (Group A - 제4경추 몸체부 하연의 만곡 정도가 1.05 mm 이하, Group B -제4경추 몸체부 하연의 만곡 정도가 1.05- 2.07 mm 사이, Group C -제4경추 몸체부 하연의 만곡 정도가 2.07 mm 이상)세 그룹에서 각각 제4경추 몸체부의 수직 길이, 수평 길이, 수직/수평 비율, 초경의 시기, 수완부 골 성숙 단계를 측정한 결과 다음과 같은 결론을 얻었다. 평균 수완부 골 성숙 단계는 Group A가 SMI 5.67 ± 2.57단계, Group B는 SMI 8,73 ± 2.41 단계, Group C는 SMI 10.00 ± 1.47단계로 나타났다. GroupA에서 Group B, Group C로 갈수록 제4경추의 수직 길이, 수평 길이, 수직/수평 비율, 수완부 골 성숙 단계에 있어서 각각 유의하게 더 큰 값을 보였다. 본 연구대상 아동의 평균 초경 시기는 11.64 ± 0.92세를 보였다. 제4경추 몸체부 하연의 만곡 정도, 수직 길이, 수평 길이, 수직/수평 비율은 수완부 골 성숙 단계와 각각 서로 유의한 양의 상관관계를 나타냈다. 초경을 경험한 그룹이 초경을 경험하지 않은 그룹에 비해 제4경추의 수직 길이, 수평 길이, 수직/수평 비율, 수완부 골 성숙 단계에 있어서 유의하게 큰 값을 보였다. 연구 결과 측모 두부 규격 방사선사진상 제4경추 하연의 만곡 깊이가 2.07 mm 이상인 경우 성장의 완료 단계에 가까운 시기로 나타나 이 시기의 악정형적 치료는 큰 효과를 얻을 수 없을 것으로 사료된다. Objective: This study analyzed the morphologic changes of the fourth cervical vertebra body to determine the skeletal age of orthodontic patients during growth. Methods: Eighty-one female patients aged from 11 to 14 who had cephalograms taken on the same day were examined. The subjects were divided into three groups depending on the depth of the concavity of the lower border of the fourth cervical vertebra (Group A: less than 1.05 mm, Group B: 1.05 - 2.07 mm, Group C: greater than 2.07 mm). Menarcheal timing, SMI stage, length, width and ratio of length and width of the fourth cervical vertebra body were analyzed and the following results were obtained. Results: The average SMI stage of group A,B and C were 5.67 ± 2.57, 8.73 ± 2.41, and 10.00 ± 1.47, respectively. Length, width, ratio of length and width, and SMI stage were greater in group B than group A and in group C than group B. Mean menarcheal timing was 11.64 ± 0.92 years. Concavity depth, length, width, ratio of length and width showed a significant positive correlation with SMI stage, especially with the concavity depth. Conclusion: The results of this study propose a simple method for determining the timing of orthopedic treatment by measuring the concavity depth of the fourth cervical vertebra on the cephalogram.

韓國人 下顎骨에 관한 體質人類學的 硏究

李在學,朴景蘭,金源式 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.1

Korean mandibles(male 71, female 23) were measured and analysed physical anthropologically, and compared with those of early 1900s Korean and with those of other nations. The results were as follows: 1. According to the Thomson index, the mandibular type of early 1900s Korean was mesognath, but changed into dolichognath lately. 2. It was considered that the national differences and chronologic changes in the same species were affected by genetic and environmental factors, but the environmental factors, such as improvement of nutritional conditions, changes of foodstuffs and the changes of living pattern etc. should be encountered more significantly.

폴리프로필렌 纖維用 Carbene染料의 開發에 關한 硏究

李學沂,林龍進,민경은 慶北大學校 1982 論文集 Vol.33 No.-

Reactive dyes, which reaction center is carbene, were prepared and the dyeability of polypropylene fiber by those dyestuffs was investigated. Furthermore, a new say of dyeing and an applied technique for pretreating polypropylene with carbenic precursor were studied to improve dyeability. In this experiment, ketones were used as starting materials because these are mostly common functional group in dyes and dyestuff intermediates. Ketones could be changed to tosylhydrazone derivatives by tosylhydrazine in methanol at 0℃ in the presence of aqueous hydrochloric acid. Reactive carbenic dyes were prepared by the reaction of n-butyllithium and these hydrazone derivatives in ethly ether solvent. Dyed polypropylene showed excellent endurance to the light and preserverance to laundry, which were confirmed by means of blue and gray scales. The fact that polypropylene was bonded covalently to dyestuff molecules was confirmed by extraction and reprecipitation. Using the aldehyde as the starting material, carbenic precursor was also prepared analogous route to the dyestuff. After pretreating polypropylene fiber with this precursor, dyeing pattern of fiber in acidic media with butyl orange showed similar adsorption curve which is the typical results of acidic dyeing process. It means that polypropylene could be dyed easily in acidic media if it had pretreated by carbenic precursor.

절삭가공조건의 데이터베이스 구축에 관한 연구

이정길,손덕수,이우영,유중학,임경화 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

There was not the evident analysis about the cutting process of CNC machining, and wouldn't be difficult to estimate the result of machining for the various cutting conditions. Therefore they were not founded the systemic technology about the optimum cutting conditions and selection of cutting tools. So this study have investigated the common facts for needs through the end-mill cutting machining by Machining-Centers or High-speed cutting machines, and developed the user-centered intelligent decision system to selection of the methodology about cutting conditions to improve the machining efficiency of end-mill cutting process.

重金屬Ion과 Chelate를 形成하는 Aminocarboxylic Acid 樹脂의 合成

李學沂,金祐埴,민경은,權五亮 慶北大學校 1980 論文集 Vol.29 No.-

Crosslinked polyacrylamide was prepared from acrylamide and divinylbenzene by the radical polymerization in methanol to prepare crosslinked polyvinylamine by the Hofmann reaction. Crosslinked aminocarboxylic acid resin was finally prepared by the reaction of crosslinked polyvinylamine and chloroacetic acid. The adsorption of crosslinked aminocarboxylic resin for Cu^+2, Zn^+2, Ni^+2, and Co^+2 varies with pH and the resin shows a high adsorption in the range of pH 6-7. The order of adsorption for heavy metal ions was Cu^+2>Zn^+2>Ni^+2>Co^+2 at the above pH region.

포도에 대한 Captafol 수화제의 안전사용기준 설정

李載球,慶箕性,金學南 충북대학교 농업과학기술연구소 1993 農業科學硏究 Vol.11 No.1

In order to establish the criteria for the safe use of the fungicide captafol on grapes, 12 plots with different spray frequency and different spray time were placed and sprayed on stems and leaves with the captafol wettable powder up to 3, 7, 15, 30, 45, 60 days before harvest. The results of the analysis of captafol residues on the sample grapes were as follows : 1- Recovery values obtained from fortified control samples were 85.3 and 90.0%, respectively, at the 0.1 and 1.0 ppm levels, the detection limits being 0.06 ng(0.015 ppm). 2. Captafol residues were detected in all samples, ranging from 0.25 to 5.79 ppm. 3. Captafol residues had a tendency to become the more, the more spray frequency and the closer spray time to harvest. 4. The captafol residues on grapes were within the maximum residue limits in the samples sprayed 4 times involving those sprayed up to 3 days before harvest, whereas the residues in the samples sprayed 5 times were beyond the limits. 5. It was recommended that the captafol WP should be sprayed on grapes 4 times up to 7 days before harvest.

활성탄 종류에 따른 골프장 사용농약의 흡착 특성

이용두,김학모,송희경 제주대학교 해양과환경연구소 2005 해양과환경연구소 연구논문집 Vol.29 No.2

두부 손상이 골절 칭 촉진 시동물 모델 및 유전자 발현 분석

김경희,김학선,문성환,김향,권언해,이환모,박희완,한수봉,문은수 대한정형외과연구학회 2003 대한정형외과연구학회지 Vol.6 No.2