• Journal of the Korean Statistical Society
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• 제27권3호
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• pp.369-383
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• 1998

This paper deals with a robust regression estimator. We propose an efficient one-step GM-estimator, which has a bounded influence function and a high breakdown point. The main idea of this paper is to use the Mallows-type weights which depend on both the predictor variables and the residuals from a high breakdown initial estimator. The proposed weighting scheme severely downweights the bad leverage points and slightly downweights the good leverage points. Under some regularity conditions, we compute the finite-sample breakdown point and prove the asymptotic normality. Some simulation results and a numerical example are also presented.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 B
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• pp.858-860
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• 2000

Recently, optical pickup actuators have been designed to have structures that extruded lens to decrease their height, because they are used in very thin drive for notebook computers. However because of discordant and undesirable of forces that are supposed to happen in this design feature, subsidiary resonance such as rolling and pitching mode exert bad influence on actuator. In this paper, we presented force constituents to clarify the cause of subsidiary resonance analysis to evaluate characteristics of actuators. As a result. we could find out design parameters to diminish the influence of subsidiary resonance. Sample actuators designed with appropriate parameters were fabricated and put to practical tests. Comparing analysis with experimental results, we verified the accuracy of the analysis and the effectiveness of the method presented.

• 한국정밀공학회지
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• 제14권2호
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• pp.74-83
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• 1997

The non-periodic angular accelerations of engine are the major cause of gear rattle. This gear rattle is based on the existence of a backlash between the drive gear of input shaft and the free gear of output shaft in the gearbox. Especially, the neutral gear rattle have a very bad effect on the ride quality. Test-rig was constructed in order to evaluate the parameter influence upon the neutral gear rattle. Also, each different 4 type torsional characteristic of clutch was manufactured. Experimental conditions are the use of each different 4 type torsional characteristic of clutch and oil temperature variation in gearbox. In case of the same stiffiness of pre-damper type clutch at idling, the clutch of large hysteresis showed dam- ping effects at the 2nd input gear and the 2nd output gear. Also, the main-damper type clutch was shown to large resonance phenomenon at the 2nd input gear. Accordingly, main-damper type clutch was unapp- roriate at idling.

• 한국보건간호학회지
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• 제32권3호
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• pp.388-399
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• 2018

Purpose: The aim of this qualitative study was to identify the experiences of smoking and smoking cessation in out-of-school youth. Methods: The participants were 12 out-of-school youths belonging the Youth support Center located in A and B area. The data were collected from January 8 to 15, 2018, using a FGI(Focus Group Interview). The main sub-domains of the experiences of smoking and smoking cessation in out-of-school youth by 7 questions were categorized from the intrapersonal, interpersonal, organizational, and community factors in ecological model. Results: The motivation, continuity, disadvantage of smoking experiences of out-of-school youth were analyzed in 10 sub-domains (curiosity, friend's invitation, mood of adapted group, habit, relieving stress, providing breaks, friendship, physical damage, loss of money, a bad sight of smoker). The reason, difficulty, advantage, reason for restarting smoking cessation experiences of out-of-school youth were analyzed in 15 sub-domains (physical damage, for future hope, invitation of others, influence of family, weight gain, emotional stress, worsening friendship, improvement physical condition, saving money, better relationships, not with bad friends, withdrawal, smoking of friends, drinking, separated a lover). Conclusion: Based on the results, it is expected that a Specialized Smoking Cessation Education Program will be developed for out-of-school youth's health activities in ecological factors.

• 산업진흥연구
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• 제6권3호
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• pp.37-47
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• 2021

이 연구는 명리고전 이론서 중 『적천수천미(滴天髓闡微)』 「상관론(傷官論)」을 지침삼고 그 외 명리고전에 나타난 과거 상관론에 관한 고찰 연구이다. 원문에서 상관(傷官)에 대한 첫마디는 "상관견관과난변(傷官見官果難辨)"이라 하였다. 정관이라 함은 왕정국가 사회에서 국가의 중책을 맡게 되는 속성을 지닌 인물에 대한 해석을 담고 있는데 그것을 해치는 것이 상관(傷官)이니 어찌 소홀히 쉽게 풀이할 수가 있는가라는 염려가 담겨져 있다. 현대와 달리 과거에는 사회적으로 성공하고 재물을 모을 수 있는 방법은 관직에 나아가는 길 이외는 다른 방법이 없었다. 성공할 여건과 기회가 주어지기 어려운 시대에 길흉과 성공의 기준이 현대와 큰 차이가 있을 수밖에 없었다. 즉 과거는 관(官)을 극하는 상관(傷官)은 몹시 해로운 작용을 하는 것으로 보았다. 그러나 현 과학사회에서는 관의 극을 향하던 상관의 쓰임이 매우 다양한 곳에서 빛을 보게 되었다. 하여 본 연구는 고전의 상관론 고찰을 통하여 시대에 맞는 재해석과 활용방법에 대한 확장성의 기반을 마련하는 것이다.

• 한국농공학회지
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• 제39권3호
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• pp.128-137
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• 1997

In this study, examined influence of consolidation effect that had affected by location of pump inlet that was set collection well for drainage of pore water discharged by embankment on soft ground through the field test. The results of this study are summarized as follows; 1 Initial consolidation curve value were larger than theoritic value, the cause of these phenomena were thought influence of secondary consolidation and three dimensional strain of soft clay. 2. The settlement value of Hosino method was larger than that of Hyperbolic method, but settlement value of Hyperbolic method was accurate more than that of Hosino method in the prediction of settlement. 3. When pump inlet in collection well came down from GL+O.3m to GL-1.5m, settlement value increased about 10cm and when the ground water level was made insitu after pumping had completed , settlement was expanded about 7~8cm. So it is found that location change of pump inlet bad an influence on settlement remarkably. 4. If location of pump inlet in collection well for large scale estate or wide road site is lowered than original ground level, the settlement will be accelerated effectively, and at this stage automatic pump must be used in pumping.

• The Journal of Asian Finance, Economics and Business
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• 제8권8호
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• pp.103-115
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• 2021

This study investigates the relationship between family ownership and the stock price crash risk. It believes that this relationship would never be in direct connection. The authors design and then find that family ownership is predisposed, in the first place, to the related party transaction, then the related party transaction causes the future stock price crash. This study infers that employing the power of family ownership creates the Type I agency problem, although this is not relevant for the Type II problem. From the perspective of the hoarding theory, family ownerships produce opaque accounts by blurring financial information. The blurred information is probably hidden in the related party transactions. This study, therefore, splits these transactions into accounts receivable, other accounts receivable and other receivables. Finally, this research concludes that the family ownership affects related party transactions. These then are used as an instrument to influence the leaded related party transaction. The latest, leaded related party transactions influence the future stock price crash. This study infers that related party transactions are abusive practices, especially on the types of receivables. It implies corporate governance's revitalisation.

• 한국산학기술학회논문지
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• 제21권8호
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• pp.205-214
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• 2020

본 연구의 목적은 고객불량 행동, 직무소진, 긍정심리자본이 간호사의 직무착근도에 미치는 영향을 파악하기 위함이다. 자료수집은 2개 광역시에 소재한 종합병원 3곳에 근무하는 간호사 198명을 대상으로 구조화된 설문지를 이용하여 2019년 7월 1일부터 7월 31일까지 실시하였다. 자료분석 방법은 SPSS 21.0 통계프로그램을 이용하여 t-test, ANOVA, Scheffe' test, Pearson's correlation coefficients 및 Multiple regression으로 분석하였다. 분석 결과, 고객불량 행동은 직무소진과 유의한 정적 상관관계(r=.24, p=<.001), 긍정심리자본(r=-.37, p=<.001), 직무착근도(r=-.48, p=<.001)와는 유의한 부적 상관관계가 있었고, 직무소진은 긍정심리자본(r=-.44, p=<.001), 직무착근도(r=-.31, p=<.001)와 유의한 부적 상관간계, 긍정심리자본은 직무착근도(r=.49, p=<.001)와 유의한 정적 상관관계가 있었다. 회귀분석 결과, 직무착근도에 유의한 영향을 미치는 요인은 개인적 특성 중 직위(β=-.19, p=.001)와 독립변인 중고객불량 행동(β=-.34, p<.001), 긍정심리자본(β=.32, p=.004)이었고, 이들 변인은 직무착근도를 38% 설명하는 것으로 확인되었다. 본 연구결과를 기반으로 간호사의 직무착근도를 높이기 위해서는 고객불량 행동을 근절하고 관리하기 위한 전략을 개발하고, 긍정심리자본을 강화하고 발전시킬 수 있는 다양한 프로그램 개발이 필요하다.

• 한국생활과학회지
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• 제22권4호
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• pp.539-558
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• 2013

The purpose of this study is to examine relationships among university students' self-differentiation, self-esteem and mental health. The subjects were 400 students of four universities in Busan and Gyungnam area. A questionnaire survey was done. The results of this study are as follows : First, the levels of university students' self-differentiation and self-esteem were high. Second, university students' self-differentiation and self-esteem were correlated positively. Third, the levels of university students' depression and anxiety were relatively low. It showed that the subjects' mental health of this study were not bad. Fourth, depression had no significant difference by gender. However, female students had higher anxiety than male students had. Fifth, university students' self-differentiation and self-esteem had negative correlation with depression and anxiety, and self-esteem played a role of mediating variable between self-differentiation and mental health. Sixth, family projection, family regression and self integration of self-differentiation had indirect influence upon the students' mental health through self-esteem, while cognitive-emotional function had direct influence upon mental health and had indirect influence upon mental health through self-esteem as well. In this study, university students' self-differentiation and self-esteem were found to be important variables having influence upon mental health, and self-differentiation had indirect influence upon mental health through self-esteem. Counselling intervention strategies should be established considering self-differentiation and self-esteem of the students who complained about their maladjusted emotion and human relation problems at schools. Also, programs enhancing self-differentiation and self-esteem of university students should be developed and the execution of these programs will be needed to help the university students who experienced mental health problems such as depression, anxiety and so on.

• 콘크리트학회논문집
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• 제18권4호
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• pp.459-467
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• 2006

최근 하천골재의 부존량 감소와 건설수요의 증가로 양질의 모래가 고갈되었고, 바닷모래와 같이 자연상태에서 얻을 수 있는 골재도 그 품질이 저급화되면서 골재의 품질에 대한 관심을 갖게 되었다. 따라서 잔골재를 바닷모래에만 지나치게 의존하고 있는 공급원의 편중을 다양화할 필요가 있으며, 바닷모래를 대체할 수 있는 골재원을 하루빨리 발굴할 필요가 있다. 한편 국내 건설현장에는 다양한 잔골재가 콘크리트에 사용되고 있으나, 이런 잔골재가 콘크리트에 미치는 영향에 대해 체계적으로 검토한 연구가 거의 없다. 따라서 본 연구에서는 최근 국내 건설현장에서 비교적 많이 사용되고 있는 잔골재가 콘크리트의 품질에 미치는 영향을 검토할 목적으로 잔골재 종류가 굳지 않은 콘크리트의 물성 및 경화된 콘크리트의 강도에 미치는 영향을 분석하였다. 그 결과, 부순모래는 바닷모래 및 강모래와 같은 천연골재에 비해 콘크리트의 유동성과 공기 연행성을 저하시키거나 블리딩을 증가시키고, 특히 입도 입형이 불량한 부순모래를 사용한 경우에는 더욱 콘크리트의 물성이 저하되는 것으로 나타났다. 그리고 W/C 55%, 45%에서 잔골재 종류가 강도에 미치는 영향은 거의 없으나, W/C 35%에서 부순모래는 천연골재에 비해 강도를 저하시키는 것으로 나타났다. 또한 입도 입형이 불량한 부순모래를 천연골재와 혼합하여 사용하는 경우에는 굳지 않은 콘크리트의 특성을 향상시키며, 강도에도 나쁜 영향을 미치지 않는 것으로 분석되었다.