• Title/Summary/Keyword: stepwise

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A Study on the Coping Strategies and Marital Satisfaction of Dual-Earner Men and Women Across the Family Life Cycle (가족생활주기에 따른 맞벌이 남녀의 대처전략과 결혼만족도 연구)

  • Lee, Eun-Hee
    • Korean Journal of Social Welfare
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    • v.45
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    • pp.288-314
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    • 2001
  • The purpose of this study is to examine the strategies that may influence the marital satisfaction of dual-earner men and women. General linear model, Pearson's correlation analysis, Stepwise multiple regression were employed for data analysis. the subjects are 396 dual-earner men and women. The result from the research were as follows: 1) coping strategy use differs significantly by life cycle stage. 2) The following strategies significantly correlated with the level of marital satisfaction: cognitive restructuring, delegation. using social support, modifying standards, personal time reducing. 3) The result of stepwise multiple regression analysis indicated that strategies which predict the level of marital satisfaction were cognitive restructuring, delegating, using social support, personal time reducing. these finding give us significant practical implications for social work intervention.

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Stress, Yangsaeng and Subjective Happiness Among Female Undergraduate Nursing Students in the Republic of Korea (여자 간호대학생의 스트레스, 양생(養生)과 주관적 행복감)

  • Park, Hye Sook
    • The Journal of Korean Academic Society of Nursing Education
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    • v.20 no.4
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    • pp.471-481
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    • 2014
  • Purpose: This study investigates the relationship among stress, Yangsaeng and subjective happiness in female undergraduate nursing students in the Republic of Korea. Method: The subjects of this study were 283 female undergraduate nursing students in Korea. Data were collected using a self-reporting questionnaire. Data analysis included descriptive statistics, Pearson's correlation coefficients, independent t-tests, one-way ANOVA, Scheffe test, Stepwise multiple regression and Cronbach's ${\alpha}$. Results: Yangsaeng negatively correlated with stress (r=-.299, p<.001) but positively correlated with subjective happiness (r=.440, p<.001). Stress negatively correlated with subjective happiness (r=-.238, p<.001). Stepwise multiple regression revealed that Yangsaeng and satisfaction with the field of nursing explained 25.4% of subjective happiness. Conclusion: The Yangsaeng oriental health care regimen could lower stress and heighten subjective happiness. Therefore, Yangsaeng could be recommended as a feasible means of promoting health and subjective happiness.

Kinetics and Mechanism of the Pyridinolysis of Aryl Cyclopropanecarboxylates in Acetonitrile

  • Koh, Han-Joong;Kang, Suk-Jin;Kim, Cheol-Ju;Lee, Hai-Whang;Lee, Ik-Choon
    • Bulletin of the Korean Chemical Society
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    • v.24 no.7
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    • pp.925-930
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    • 2003
  • Kinetic studies of the reaction of Z-aryl cyclopropanecarboxylates with X-pyridines in acetonitrile at 55.0 ℃ have been carried out. The reaction proceeds by a stepwise mechanism in which the rate-determining step is the breakdown of the zwitterionic tetrahedral intermediate, $T^{\pm}$. These mechanistic conclusions are drawn base on (i) the large magnitude of ρx and ρz, (ii) the positive sign of ρxz and the larger magnitude of ρxz than normal $S_N2$ processes, (iii) a small positive enthalpy of activation, Δ$H^≠$, and a large negative, Δ$S^≠$, and lastly (iv) adherence to the reactivity-selectivity principle (RSP) in all cases.

Affecting Factors on Job Satisfaction, Nursing Professional Attitudes of New Nurses according to Transformational Leadership (프리셉터의 변혁적 리더십이 신규간호사의 직무만족과 간호전문직태도에 미치는 영향)

  • Yang, Nam-Young
    • Journal of Korean Academy of Nursing Administration
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    • v.12 no.2
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    • pp.305-310
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    • 2006
  • Purpose: This study was to identify affecting factors on job satisfaction, nursing professional attitudes of new nurses according to transformational leadership of preceptors. Method: The subjects were 101 new nurses who were working for the 4 of university hospitals in Seoul, Daejeon and Kyong Ki. This study was conducted from Aug to Oct 2005. The data was collected by questionnaires and were analyzed using descriptive statistics, pearson correlation coefficient, stepwise multiple regression. Result: Transformational leadership of preceptors were significantly correlated between Job satisfaction, nursing professional attitudes of the new nurses. The stepwise multiple regression analysis for job satisfaction, nursing professional attitudes revealed that the most powerful predictor was charisma. Conclusion: The findings indicated that the transformational leadership of preceptors is important for improving job satisfaction, nursing professional attitudes of the new nurses. Therefore it may be necessary further to develop of the leadership training program for effective preceptorship.

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Dynamic Lot-Sizing with Stepwise Transportation Costs (계단형 수송비용을 고려한 동적 로트 크기 결정)

  • Kim, Jae-Gon;Lee, Dong-Ho;Choi, Seong-Hoon;Lim, Seung-Kil
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.30 no.4
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    • pp.127-132
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    • 2007
  • 본 논문에서는 운송비용과 재고유지비용의 합을 최소화하는 것을 목적으로 유한 계획기간 동안의 수요를 충족시키는 동적 랏사이징 문제를 다룬다. 운송비용을 고려하는 기존의 랏사이징 모형들과는 달리 운송 트럭의 대수에 따라 계단형으로 운송비용이 증가하는 경우를 다루고 있다. 이 문제를 선형정수모형으로 모델링하며 그리디 방식의 휴리스틱을 제안한다. 제안된 휴리스틱의 성능을 평가하기 위해 계산실험을 수행하며, 그 결과 매우 짧은 시간 안에 최적해에 가까운 해를 찾을 수 있음을 보여준다.

Study on the Critical Storm Duration Decision of the Rivers Basin (중소하천유역의 임계지속시간 결정에 관한 연구)

  • Ahn, Seung-Seop;Lee, Hyeo-Jung;Jung, Do-June
    • Journal of Environmental Science International
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    • v.16 no.11
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    • pp.1301-1312
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    • 2007
  • The objective of this study is to propose a critical storm duration forecasting model on storm runoff in small river basin. The critical storm duration data of 582 sub-basin which introduced disaster impact assessment report on the National Emergency Management Agency during the period from 2004 to 2007 were collected, analyzed and studied. The stepwise multiple regression method are used to establish critical storm duration forecasting models(Linear and exponential type). The results of multiple regression analysis discriminated the linear type more than exponential type. The results of multiple linear regression analysis between the critical storm duration and 5 basin characteristics parameters such as basin area, main stream length, average slope of main stream, shape factor and CN showed more than 0.75 of correlation in terms of the multi correlation coefficient.

A Study on Minimum Cost Expansion Planning of Power System by Branch and Bound Method (분지한정법에 의한 전력계통의 최소비용에 관한 연구)

  • 송길영;최재석
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.33 no.1
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    • pp.9-16
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    • 1984
  • This paper describes the minimum cost expansion planning which is based on the economical aspect under the various conditions on the power system expansion planning. It presents not only linear cost characteristics analysis but also stepwise cost characteristics analysis which satisfies practical condition in the power system. The latter analysis must be handled by integer programming (IP), because the relation between the cost and the capacity has stepwise characteristics. In order to proceed the latter analysis, the solving procedure is illustrated in detais by using branch and bound method which includes the network flow theory and maximum flow-minimum cut theorem.

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Nonlinear Control using Stepwise Fuzzy Moving Sliding Surface (계단형 퍼지 이동 슬라이딩 평면을 이용한 비선형 제어)

  • 유병국;양근호
    • Proceedings of the Korea Institute of Convergence Signal Processing
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    • 2003.06a
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    • pp.153-156
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    • 2003
  • This short paper suggests a control strategy using a stepwise fuzzy moving sliding surface. The moving surface is a Sugeno-type fuzzy system that has the angle of state error vector and the distance from the origin in the phase plane as inputs and a first-order linear differential equation as an output. The surface initially passes arbitrary initial states and subsequently moves towards a predetermined surface via rotating or shifting. the proposed method reduces the reaching and tracking time and improves robustness. The asymptotic stability of the fuzzy sliding surface is proved. The validity of the proposed control scheme is shown in computer simulation for a second-order nonlinear system.

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The Effects of Retail Area and Shopping Mall Images on Consumer Behaviors (상권 및 패션쇼핑몰의 이미지가 쇼핑몰 이용객의 행동에 미치는 영향)

  • 윤남희;박경애
    • Journal of the Korean Society of Clothing and Textiles
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    • v.26 no.7
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    • pp.1005-1014
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    • 2002
  • The purpose of this study was to examine the effects of retail area image and shopping mall image on consumer behaviors in the retail area and in the shopping ma]1. Data were obtained from a survey to a stratified sample selected at the exits of five different malls. A total of 740 questionnaires were distributed, and 661 responses were analyzed. Stepwise regression analysis revealed that two retail area image factors of variety of stores and atmosphere significantly affected all three consumer behaviors (shopping, service facility visits, social activities). Stepwise logistic regression showed that facility and atmosphere of the retail area image and product & service and convenience of the fashion shopping mall image affected seven consumer behaviors in the shopping mall. The results indicate that the retail area image as well as the shopping mall image affects a variety of consumer behaviors in the shopping mall though no shopping mal1 image affects behaviors in the retail area.

Purification of Streptococcal nuclease from Streptococcus sp. (Streptococcus sp.로부터 Streptococcal nuclease의 분리 정제)

  • Oh, Jung-Hwa;Ko, Young-Hwan;Song, Kyung-Bin
    • Applied Biological Chemistry
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    • v.37 no.5
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    • pp.334-338
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    • 1994
  • Streptococcal nuclease was completely purified by stepwise CM-Sepharose column chromatography from crude extracts isolated from Streptococcus sp. The active enzyme fraction was eluted with the buffer containing 0.2 M NaCl. The purified enzyme showed a homogeneity on SDS PAGE and had a molecular weight of 35,000 daltons. The optimum pH and temperature for the enzyme were 9.0 and $50^{\circ}C$, respectively.

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