자동차 Instrument Panel에 대한 사출 성형 해석 ( Injection Molding Analysis of a Car Instrument Panel )

최천,김형준,김재수,이원상 대한기계학회 1995 대한기계학회 춘추학술대회 Vol.- No.-

대학 운동선수의 사회적지지가 진로결정 자기효능감 및 진로성숙도에 미치는 영향

최천,송은일 한국무예학회 2024 무예연구 Vol.18 No.1

This study, a total of 217 survey responses from college athletes were used as final analysis data to find out the effect of social support on career decision-making self-efficacy and career maturity of college athletes, and the following conclusions were drawn through statistical tests of correlation analysis and multiple regression analysis using the SPSS 21.0 statistical program. First, social support (leader support) was found to affect career decision self-efficacy. Second, it was found that social support (support for leaders, support for friends) affects career maturity (determinism). Third, career decision self-efficacy (general efficacy) has been found to affect career maturity (determination, preparation).

1.5Box 차량의 실내 소음ㆍ진동 육성사례

최천 한국소음진동공학회 1998 한국소음진동공학회 세미나 Vol.1998 No.10-1

초등학교 태권도 수련생의 신체활동 즐거움 및 자기표현

최천,전재진,곽정현 세계태권도문화학회 2011 세계태권도문화학회지 Vol.- No.3

The purpose of this study is Taekwondo school that occupies a large proportion of students have the pleasure of students and that self-expression through the educational effectiveness of training Taekwondo motivation to participate and to provide basic data about the necessity and purpose of the study shall have the following results was obtained. Students according to the pleasure of the first difference of the background variables gender analysis showing significant differences in the self-confidence was found to be higher than boys girls. However, the difference in sex ratio, caution is advised because of the size. Select the reason for the difference due to the enjoyment of taekwondo fun and team spirit was showing no significant differences in the interests of the elements according to the Taekwondo fun factor of the difference was showing no significant difference in the subsequent post-validation results did not appear interested in Poomsae many students have shown you can see the most high. Gender differences in self-expression for significant differences in expression were seen, women have shown higher than students of these men can be seen students. However, as with joy because of the size difference in sex ratio should be taken.

태권도 지도자들의 학교브랜드에 대한 인식과 브랜드애착, 공동체 의식, 조직몰입 간의 관계

최천,송은일 한국무예학회 2017 무예연구 Vol.11 No.1

The purpose of this study is to investigate the effects of Taekwondo masters on brand recognition, brand attachment, community consciousness and organizational commitment. The following conclusions were obtained. First, there was a difference in attachment, community consciousness and organizational commitment of college brand of Taekwondo master according to alumni brand recognition. Brand attachment and community consciousness were significantly different in all factors, and organizational commitment was significant in emotional commitment There was a difference. Second, the influence of Taekwondo master 's brand attachment on community consciousness had a significant effect on all factors. Third, emotional commitment and persistent commitment had significant influence on brand love, and normative commitment had no significant effect on all factors in the effect of brand attachment of Taekwondo masters on organizational commitment. 본 연구는 예비태권도경영자들의 학교브랜드인식과 브랜드애착, 공동체의식 및 조직몰입에 대한 영향을 살펴봄으로써 향후 그들의 도장명을 선택하는데 기초자료를 제공하고자 연구를 진행한 결과를 토대로 다음과 같은 결론을 얻었다. 첫째, 배경변인에 따른 태권도지도자의 학교브랜드에 대한 애착, 공동체의식 및 조직몰입에는 부분적으로 차이가 있었는데 브랜드애착과 공동체 의식은 모든 요인에서 유의한 차이가 있었고, 조직몰입에서는 감정적 몰입에서 유의한 차이가 있었다. 둘째, 태권도 지도자의 브랜드애착이 공동체의식에 미치는 영향에서 모든 요인에서 유의한 영향을 미치고 있었다. 셋째, 태권도 지도자의 브랜드애착이 조직몰입에 미치는 영향에서 감정적몰입과 지속적몰입은 브랜드사랑에서 유의한 영향을 미쳤으며, 규범적몰입에서는 모든 요인에서 유의한 영향을 미치지 않았다.

태권도 지도자의 직무스트레스가 이직의도에 미치는 영향

최천,송은일,최봉준 한국무예학회 2016 무예연구 Vol.10 No.1

The purpose of this study is to examine the effects of job stress on job commitment and turnover intent with targets of those who are working in Taekwondo Leader. A total of 129 answered questionnaires were used as final data. The following conclusions were obtained by conducting correlation analysis and multiple regression analysis using SPSS 18.0 statistical program. First, it is found that turnover intent affects some sub-factors of job stress such as inappropriate compensation. Second, it is found that turnover intent affects some sub-factors of job stress such as job requirements. 태권도 지도자들은 높은 보수나 개인의 자아실현, 여가운용을 위한 삶의 여유와 만족을 추구하고자 하는 성향이 증가하고 있어 년 간 지도자 배출 대비 태권도 지도자 부족현상이 심화되고 있다. 따라서 본 연구는 태권도 지도자를 대상으로 직무스트레스와 이직의도와의 연관성과 이에 따른 기초자료 및 시사점을 제공하는데 목적이 있다. 본 연구는 대전, 충남, 충북에 근무하고 있는 태권도 지도자(사범) 총 129명을 대상으로 진행하였으며, 수집된 자료는 SPSS 18.0 통계프로그램을 이용하여 상관관계분석 및 중다회귀분석의 통계적 검정을 통해 다음과 같은 결론을 도출하였다. 첫째, 직무스트레스 하위요인 중 보상부적절은 이직의도에 영향을 미치는 것으로 나타났다. 둘째, 직무스트레스 하위요인 중 직무요구는 이직의도에 영향을 미치는 것으로 나타났다. 향후 태권도 지도자의 애로사항을 주기적으로 파악하고 대응할 수 있는 노력이 지속적으로 이루어져야 하며, 기업의 혁신적이고 창의적인 조직 개발기법 등을 벤치마킹할 필요가 있다.

안전관리 사례 : 발파 공사를 중심으로

최천일,Choi, Chun-Il 한국건축시공학회 2004 한국건축시공학회지 Vol.4 No.2

이온크로마토그래피를 이용한 토양 중 퍼클로레이트 정량에 관한 국제표준(안) 연구

최천일,이군택,박민기,정문주,김지양,강지영,류지영,Choi, Cheon-il,Lee, Goon-taek,Park, Min-ki,Jeong, Moon-ju,Kim, Ji-yang,Kang, Ji-young,Ryu, Ji-young 한국지하수토양환경학회 2015 지하수토양환경 Vol.20 No.6

Based on the literature study for the determination of perchlorate in soil we chose the ion chromatography as a measurement method and decided to use 70 mM KOH as an eluent to avoid the interference derived from the co-elution of pyrophosphate (P₂O₇⁴⁻), tripolyphosphate (P₃O₁₀⁵⁻). Also we proposed to use air dried soil through 0.15 mm sieve and distilled water as an extractant. Under the these basic concepts, we carried out the experiments to set up the detail procedure like solid to liquid ratio (S/L ratio), extraction time, device for extraction and indicating factors for quality control (e.g. precision, accuracy, MDL, LOQ). In case of time and device for extraction, 5 hours of mechanical shaking or 1 hour of centrifugation showed better precision and accuracy than that of sonication for 1 hour According to these results, we proposed the extraction method combining 5 hours of mechanical shaking with 1 hour of centrifugation. From the aspect of S/L ratio, the ratio of 1/2 or 1/3 showed resonable precision and accuracy. In case of the ratio of 1/2, there would be some problems in the separation process when the proportion of fine particle is high. Therefore, we proposed the extraction ratio of solid to liquid as 1/3 instead of 1/2. With the consideration of cost effectiveness and soil salinity, we proposed the use of cartridge for removing the interfering anions like chloride, sulfate and carbonate in specific sample such as saline soil.

Open Problems in Regular Operator Theory

Choi, Chun-In,Lee, Woo-Young 성균관대학교 1992 論文集 Vol.42 No.2

본 논문에서는 정칙작용소의 여러가지 특별한 경우를 살펴보고, 이에 관한 몇가지 미해결 문제를 제시한다.

SPECTRA의 連續性에 관하여

김용태,최천인 성균관대학교 기초과학연구소 1996 論文集 Vol.47 No.2

The restriction of the spectrum a to the set fo totally paranormal operators is continuous Let L(H) denote the algebra of bounded linear operators on an infinite dimensional complex Hilbert space H. Let K denote the set, equipped with the Hausdorff metric, of all compact subsets of C. The spectrum can be viewed as function σ : L(H) → K, mapping each operator T to its spectrum σ(T). It is well-known that the function σ is upper-semicontinuous and that σ does have points of discontinuity. Of interest, therefore, is the identification of points of spectral continuity, as in [1], and of classes C of operators for which σ becomes continuous when restricted to C. Perhaps the most accessible result in the latter direction is the one of J. Newburgh [7]: when restricted to the set of normal operators, σ is a continuous function (cf. Solution 104 of [3]). Another interesting result is([2,4]) that the restriction of σ to the set of Toeplitz operators with the most of well-known symbols is continuous. In this note we show that the restriction of σ to the set of all totally paranormal operators is continuous. Our first observation is, basically, due to Newburgh [7]: 1. Lemma. Suppose that T, T_n ∈ L(H) for n ∈ Z^+, are such that T_n converges to T. If mere exists C > 0 for which (1.1) ∥(T_n - λ)^-1 ∥ ≤ Cr((T_n - λ)^-1) for each n and for each λ ?? lim inf σ(T_n) then lim σ(T_n), where γ(·) denotes the spectral radius. Proof Since lim inf σ(T_n) ⊆ σ(T), it suffices to show that σ(T) ⊆ lim inf σ(T_n). Assume λ ?? lim inf σ(T_n). Then there exists an ε-neighborhood N_ε(λ) of λ which does not intersect infinitely many σ(T_n). Thus we can choose a subsequence {T_ni} of {T_n} such that T_ni - λ is invertible. Furthermore, we have that γ((T_ni - λ)^-1) ≤ 1/ε, and hence, by assumption. ∥(T_ni - λ)^-1∥≤ C/ε. Thus for each I, j(j>i), ∥[(T_ni - λ)^-1] - [(T_nj - λ)^-1]∥ ≤ ∥[(T_ni - λ)^-1]∥∥[T_nj - T_ni∥∥[(T_nj - λ)^-1]∥ ≤ C^2/ε^2 ∥[T_nj - T_ni∥??0, which says that (T_ni - λ)^-1 converges to, say S. Therefore (T-λ)S = lim(T_ni-λ) lim(T_ni -λ)^-1 = lim(T_ni - λ)(T_ni -λ)^-1 = 1 and similarly, S(T- λ) = 1. Therefore λ?? σ(T).