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이상돈,이해균 한국시각장애교육&재활학회 2010 시각장애연구 Vol.26 No.4
The purpose of this study is to survey visually impaired goalball players’ awareness about referees who are responsible for coordination of goalball matches; determine potential effects of referees’ judgments upon actual goalball match; deduce potential complainable factors and issues in various judgment situations of referees; and explore into possible positive ways to restore a relationship of trust between players and referees in the interest of developing goalball. In order to achieve these goals, this study used a restructured questionnaire to survey total 86 goalball players who participated in a visually impaired goalball tournament of the 28th National Games for the Disabled in Korea. And all survey data collected from them were statistically processed and analyzed to meet the goals of study. As a result, this study could come to the following conclusions:First, according to analysis on our visually impaired goalball players’ awareness about referees depending upon their sex, it is found that female players have a tendency toward higher awareness on reliability of referees than male ones, whereas male players have a tendency toward higher awareness on fairness and influence of referees than female ones. Secondly, according to analysis on visually impaired goalball players’ awareness about referees depending upon their match results, it is found that runner-up and 4th- or lower-ranking team players have a tendency toward to higher awareness on the promptness of referees than champion team players; champion, runner-up and 4th- or lower-ranking team players have a tendency toward to higher awareness on the reliability of referees than 3rd-ranking ones; and runner-up, 3rd- and 4th- or lower-ranking team players have a tendency toward to higher awareness on the fairness of referees than champion ones. Thirdly, according to analysis on visually impaired goalball players’ awareness about referees depending on their goalball career, it is found that 6-year or longer career group has a tendency toward to higher awareness about the influence of referees than 1-year or shorter career group. Fourthly, according to analysis on visually impaired goalball players’ awareness about referees depending on whether they ever have experiences in unfair judgment of referees, it is found that ‘unexperienced’ group has a tendency toward higher awareness on reliability and specialty of referees than ‘experienced’ group, while ‘experienced’ group has a tendency toward higher awareness on the influence of referees than ‘unexperienced’ group. Finally, according to analysis on visually impaired goalball players’ awareness about referees depending on their age, it is found that all of three age groups have a tendency toward ‘moderate’ or higher awareness about referees, but there is no significant difference among groups. 본 연구의 목적은 시각장애 골볼 선수들의 심판들에 대한 인식을 조사하여 심판 판정이 경기에 미치는 영향과 다양한 심판의 판정 상황에 대한 불만족 요인 및 문제점을 추출하고 그에 따른 선수와 심판 상호간의 신뢰회복과 경기 발전을 위한 개선책을 모색하는데 있다. 연구는 제28회 전국장애인체육대회 골볼 경기에 참가한 선수 86명을 대상으로 실시하였으며, 그 결론은 다음과 같다. 첫째, 시각장애 골볼 선수의 성별에 따른 심판에 대한 인식은 신뢰성에서는 여자선수가 남자선수보다 높으나, 공정성과 영향력에서는 남자 선수가 여자선수보다 높다. 둘째, 시각장애 골볼 선수의 경기성적에 따른 심판에 대한 인식은 신속성에서는 준우승, 4위 이하가 우승보다 높고, 신뢰성에서는 우승, 준우승, 4위 이하가 3위보다 높으며, 공정성에서는 준우승, 3위, 4위 이하가 우승보다 높다. 셋째, 시각장애 골볼 선수의 선수경력에 따른 심판에 대한 인식은 영향력에서 6년 이상인 집단이 1년 미만인 집단보다 높다. 넷째, 시각장애 골볼 선수의 부당한 판정경험 유무에 따른 심판에 대한 인식은 신뢰성과 전문성에서는 ‘없다’가 ‘있다’ 보다 높으나, 영향력에서는 ‘있다’가 ‘없다’ 보다 높다. 다섯째, 시각장애 골볼 선수의 연령에 따른 심판에 대한 인식은 세 집단 모두 ‘보통’ 이상의 인식을 보이고 있으나, 집단간 차이는 없다.
Association between coarse woody debris and small mammals and insectivores in managed forests
이상돈 한국생태학회 2012 Journal of Ecology and Environment Vol.35 No.3
Coarse woody debris (CWD) is generally considered dead woody material in various stages of forest decomposition and has been hypothesized to be an important habitat feature for mammals in forests of the Pacific Northwest, USA. Sherman and pitfall trapping were conducted for 2 years on three paired sites with low and high amounts of CWD. Deer mice was the dominant species with a total capture of 605 (45.6%). Four species of insectivores were captured, including Sorex moncicolus, S. trowbridgii, S. vagrans, and Neurotrichus gibbsii. A Poisson regression model was used to test whether 11CWD variables could predict insectivore captures. The volume of logs and mean decay were important variables for deer mice use of CWD. Mean distance from pieces of CWD to the capture point was significantly related to the total number of captures of trowbridge shrew (Sorex trowbridgii) and all insectivore species. Vagrant shrews (Sorex vagrans) were significantly associated with log volume. Retaining large size CWD should be part of a management plan for ground-dwelling insectivores in forests to secure their biodiversity.
거친 표면의 마찰온도 해석 및 온도측정 실험에 관한 연구
이상돈,조용주,Lee, Sang-Don,Cho, Yong-Joo 한국트라이볼로지학회 2007 한국윤활학회지(윤활학회지) Vol.23 No.2
The main object of this study is to compare the results that have been concluded by the experiment and to estimate the temperature rise that can cause the contacting surface to be damaged. The former studies are based on the Blok and Jaeger formula. By these formulas we assume that two of the contacted objects are a kind of semi-infinite solid and with this assumption we can make a temperature analysis. But this method doesn't consider lubrication conditions and the calculation time requires a lot of time in that we have to face many difficulties in measuring the actual temperature rise. In this study we combines the semi-infinite solid method and the finite volume method to analyze the temperature of the contacting surface. And we measure temperature rise of the contact surface by dynamic thermocouple.