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성인의 익스트림 스포츠 참가정도가 몰입 및 자아실현에 미치는 영향
이상구(Lee Sang Gu),임준택(Im Jun Taeg) 한국사회체육학회 2003 한국사회체육학회지 Vol.19 No.2
The purpose of this study was to examine a relation between the level of extreme sports, flow and self-actualization. This study was conducted by establishing a population consisting of participants over 20 years, in extreme sports in regions of Daejeon as of 2002 and then using cluster random sample a total of 1,200 persons ; however, the data of only a total of 1185, 708 males and 477 females, were actually used for the analysis. A questionnaire was used as a tool for this study: the level of participants in extreme sports, an independent variable, was systematically divided into period, frequency, and intensity as divided by Loy, Mcpherson, and Kenyon(1978). A parameter was composed of flow , and a Leisure Diagnostic Battery(LDB)(Witt & Ellis, 1987) adapted in Korean by Won Hyeong-jung (1989) was used as a tool to measure perceived freedom. And Personal Orientation Inventory(POl)(Shostrom, 1963), the adaptation by Seol Gi-mun(1995), was revised and complemented as a tool to measure self-actualization, a dependant variable. The self-administration method was used with questionnaires distributed by researchers and assistants who visited the site in person for sampling. The data were processed by computer with SPSS Windows 10.0 Version which is a statistical program; also used were descriptive statistics analysis, reliability analysis and standard multiple regression analysis. The conclusion drawn through the above process is as follows: First, the participate`s level of extreme sports influenced flow. Second, the participate`s level of extreme sports influenced self-actualization. Third, flow of participants in extreme sports influenced self-actualization.
Shot-Peening이 疲勞强度에 미치는 影響에 關한 實驗的 硏究
崔壯宇,任埈澤 弘益大學校 1989 弘大論叢 Vol.21 No.2
In this paper, to study shot-peening effect on the fatigue strength in elevated temperature, 10 and 15 min shot-peened smooth specimens which were made of SGD 41-D steel were experimented by the rotary bending test machine. And in order to study peening time effect on the fatigue strength, 20min shot-peened specimens were tested. The results are followed: 1. In the case of 200℃ test temperature, denoted at 10? cycle fatigue strength of not shot-peened, 10min and 15min shot-peened specimens tended to decrease 6.5%, 8.8%, 8.6% each and at 300℃ test temperature, these were increased 11.5%, 1.5% and 2.0% each compared with the fatigue strengths at room temperature. In case of 450℃ test temperature, these fatigue strengths were decreased just little bit. 2. Fatigue strength was shown the sequence; 15min shot-peened specimens, 10min shot-peened specimens and not shot-peened specimens at each temperature. The differance of the fatigue strength of not shot-peended specimens tested at each temperature was larger than that of any other specimens. 3. In case of room temperature and 200℃, the fatigue strength of not shot-peened specimens increased 20%, 18% as compared with the fatigue strength of not shot-peened specimens, and in case of 300℃ and 450℃ the difference of fatigue strength were very small. 4. In case of room temperature, the fatigue strength attendant upon peening time, shot-peened 10min increased 18.5% than not shot-peened, shot-peende 15min increased 3.2% than shot-peened 10min, and shot-peened 20min increased 1.1% than shot-peended 15min specimens. This results show that the fatigue strength increase ratio was diminish attendant upon peening time increment.