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Optimal Reservoir Operation Using Goal Programming for Flood Season (Goal Programming을 이용한 홍수기 저수지 최적 운영)

  • Kim, Hye-Jin;Ahn, Jae-Hwang;Choi, Chang-Won;Yi, Jae-Eung
    • Journal of the Korean Society of Hazard Mitigation
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    • v.11 no.2
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    • pp.147-156
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    • 2011
  • The purpose of multipurpose reservoir operation in flood season is to reduce the peak flood at a control point by utilizing flood control storage or to minimize flood damage by controlling release and release time. Therefore, the most important thing in reservoir operation for flood season is to determine the optimal release and release time. In this study, goal programming is used for the optimal reservoir operation in flood season. The goal programming minimizes a sum of deviation from the target value using linear programming or nonlinear programming to obtain the optimal alternative for the problem with more than two objectives. To analyze the applicability of goal programming, the historical storm data are utilized. The goal programming is applied to the reservoir system operation as well as single reservoir operation. Chungju reservoir is selected for single reservoir operation and Andong and Imha reservoirs are selected for reservoir system operation. The result of goal programming is compared with that of HEC-5. As a result, it was found that goal programming could maintain the reservoir level within flood control level at the end of a flood season and also maintain flood discharge within a design flood at a control point for each time step. The goal programming operation is different from the real operation in the sense that all inflows are assumed to be given in advance. However, flood at a control point can be reduced by calculating the optimal release and optimal release time using suitable constraints and flood forecasting system.

The Effects of Supervisors on Goal Orientations and Sales Performance of Department Store Salespeople (백화점 판매원의 목표지향성과 성과에 미치는 판매관리자의 영향: 패션제품 판매원을 중심으로)

  • 박경애;허순임;사공수연;신수임
    • Journal of the Korean Society of Clothing and Textiles
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    • v.24 no.1
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    • pp.116-127
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    • 2000
  • This study investigated the effects of sales supervisors on salespeople's goal orientations and sales performance in fashion retail setting. Specifically, it examined: 1) the differences in salespeople's goal orientations by salespeople characteristics; 2) the effects of supervisor's behavioral orientations on goal orientations of salespeople; and 3) the effects of salespeople's goal orientations on performance. A total of 343 questionnaires collected from salespeople in various apparel and accessory selling departments at four department stores in Korean were analyzed. Variables included supervisor's behavioral orientations(end-results, activity and capability), salespeople's goal orientations(learning and performance), sales performance and salespeople characteristics. MANOVA revealed that three was no difference in goal orientations by salespeople characteristics except by selling department. Multiple regression analysis revealed that supervisor's end-result orientation affected salespeople's learning orientation and performance orientation while activity and capability orientations did not. The study suggests that for long-term performance supervisors and retail organizations need to develop various supervisory behaviors, stimulate learning demands of salespeople, and provide training programs to achieve the learning goal.

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An Impact of Budgetary Goal Characteristics on Performance: The Case of Vietnamese SMEs

  • LE, Thang Ngoc;NGUYEN, Dung Duc
    • The Journal of Asian Finance, Economics and Business
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    • v.7 no.9
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    • pp.363-370
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    • 2020
  • The paper aims to investigate the impact of budgetary goal on profit growth directly and indirectly through managerial performance. Two main characteristics of budgetary goal mentioning in the study are the clarity of budget goal and the difficult of budget goal. Data of the research collected from survey with 197 department managers and supervisors of 80 SMEs in Hanoi and Ho Chi Minh City who have budgeting responsible. Firstly, by using quantitative research method Cronbach's Alpha and Exploratory Factor Analysis, the research show that characteristic of budgetary goal has significant and positive impact on profit growth directly. Secondly, the regression analysis among variables show that budget goal clarity was positively and significantly related to growth of sale revenue, growth of profit and managerial performance. Therefore, the empirical findings show that that managerial performance has mediating role in the relationship between budgetary goal characteristic and financial performance. The findings of this study suggest that that managers need focus on setting clearer and more difficult but attainable budget goals to increase firm performance. This paper also provides a new insight the relationship between managerial performance and financial performance. Budgetary goal characteristics still have positive but insignificant impact on growth of sales revenue.

Effects of CEO's Entrepreneurship in Small and Medium Enterprises and Goal Orientation of Employees on Collective Efficacy: Approaching Structural Equation Model (중소기업 경영자의 기업가정신과 조직구성원의 목표지향성이 조직효능감에 미치는 영향: 구조방정식 모형 접근)

  • Kang, Sung-Doo;Kang, Young-Soon
    • The Journal of the Korea Contents Association
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    • v.12 no.10
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    • pp.439-452
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    • 2012
  • The purpose of this study is to identify the best structural model among CEO's entrepreneurship(innovation proactiveness and risk-taking) in small and medium enterprises, group goal orientation(learning and performance goal orientation) and collective efficacy of employees. The result of verifying the best structural model is as follows. First. it indicated that innovation proactiveness of CEO's entrepreneurship positively affected group learning goal orientation and group performance goal orientation of employees while it did not affect risk-taking. Second, it indicated that group learning goal orientation and group performance goal orientation of employees positively affected collective efficacy. Third, it indicated that CEO's innovation proactiveness positively affected collective efficacy through group goal orientation of employees(learning and performance goal orientation). In this study, we targed 162 CEOs and 486 employees in small and medium enterprises located in Seoul, Gyeonggi and Jeju and applied the reponses of employees to 162 enterprises by using the average value measured in three divisions of each enterprise. We conducted a survey as a study method and conducted covariance structure analysis to verify the study model. Implications of the research are as below. First, we provided academic discussions by expanding the study category of goal orientation with an individual level into a group level. Second, we expanded the study category with individual goal orientation and collective efficacy into group goal orientation. Third, we suggested the possibility of another mechanism's effect between entrepreneurship and collective efficacy.

Effective Project Management Strategy Depending on Individual Self-efficacy and Task Characteristics under Multitasking Situation (멀티태스킹 상황에서 업무적 특성과 개인의 자기 효능감을 고려한 효율적인 프로젝트관리 전략)

  • Park, Jun-Young;Park, Do-Hyung
    • The Journal of Information Systems
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    • v.28 no.4
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    • pp.1-25
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    • 2019
  • Purpose The purpose of this study is to investigate cognitive mechanism of goal relations (Single-goal vs. Multiple-goals) and to-do list (Packing vs. Unpacking) and also verify the role of self-efficacy in the perspective of motivation belief. The perspective of cognitive mechanism is related to the effects of how the relations of multitasking environments affects to facilitating relation or conflicting relations. In pursuit of a single goal, judgement of task importance can be facilitated by unpacking effect due to relations of strongly associated project components including to-do list. On the other hands, in pursuit of multiple goals, judgement of task importance can be conflicted due to mutually exclusive relations of multiple goals. Additionally, the cognitive mechanism can be regulated from the role of self-efficacy, which contributes to motivation belief on how much a person is confident in achieving given tasks. In the end this research is to identify self-efficacy as boundary condition in inhibiting the effects of facilitation and conflict. Design/methodology/approach This study conducted Two-way ANOVA (Packing/ Unpacking * Single-goal/ Multiple-goals) to explore the effects of cognitive mechanism on task importance. After that we performed Three-way ANOVA, 2 (To-do list: Packing/ Unpacking) * 2 (Goal relation: Single-goal/ Multiple-goals) * 2 (Self-efficacy: Low self-efficacy/ High self-efficacy) to verify the role of self-efficacy between goal relations and to-do list. Findings In the cognitive mechanism, the task importance is not significantly different between in packed and in unpacked condition in pursuit of a single goal. But multitasking with multiple goals causes goal conflict, which means packed condition indicates significantly higher task importance than unpacked condition. Additionally, for a group with low self-efficacy unpacking leads to conflicting relation, which implies that packed condition is more efficient strategy than packed condition. On the other hands, in pursuit of mulitple goals, either packing or unpacking has no distinctive effects on task importance. However, participants with high self-efficacy are no longer affected by facilitating relation and conflicting relation as well in pursuit of either a single goal or multiple goals as well.

The Effect of Obesity-Related Quality of Life on selecting a Goal for Weight Management in Overweight and Obese Patients (과체중 여성 환자들에서 비만 관련 삶의 질이 목표체중 설정에 미치는 영향)

  • Chun, Min Young
    • Korean Journal of Community Nutrition
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    • v.20 no.4
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    • pp.281-290
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    • 2015
  • Objectives: Obesity is known to influence physical and mental health as well as the general quality of life. The aim of this study was to evaluate the effect of obesity related quality of life on selecting a goal for weight management in overweight and obese female patients. Methods: A total of 140 overweight or obese (Body mass index $23kg/m^2$) female outpatients aged ${\geq}20$ and ${\leq}60$ years from one clinic participated in this study. Patients' desired weight (goal weight, ideal weight, satisfactory weight, acceptable weight and disappointed weight) and obesity related quality of life measures were evaluated. Univariate and multivariate analysis were performed to evaluate the effect of obesity related quality of life on goal weight reduction (%) and goal body mass index (BMI). Results: Mean BMI of overweight group, mild obesity group and severe obesity group were $62.0{\pm}4.8kg$, $68.5{\pm}5.5kg$ and $83.5{\pm}9.6kg$, respectively. Mean weight loss expectations of the three groups were $16.4{\pm}4.7%$, $19.5{\pm}5.3%$ and $30.2{\pm}6.8%$, respectively and goal weight was significantly different among the three groups. Severe obesity group had a lower total quality of life score including physical, work-related, daily living domains than overweight or mild obesity groups. In univariate and multivariate regression analysis, psychosocial domain of quality of life had an effect on goal weight reduction (%) and goal BMI. Conclusions: The results of this study demonstrated that the obese patients with poorer quality of life and psychosocial health tended to choose higher goal weight reduction and lower goal BMI.

Placement and Operation of Dispersed Generation Systems using Fuzzy Goal Programming (Fuzzy Goal Programming을 응용한 분산형전원의 설치 및 운영)

  • 송현선;김규호
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.18 no.1
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    • pp.146-153
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    • 2004
  • This paper presents the method for the placement and operation of dispersed generator systems(DGs) using fuzzy goal programming in distribution systems. For the placement and operation of DGs the problem is formulated with reduction of search spaces and flexibility of system situations. Especially, the original objective function and constraints are transformed by fuzzy goal programming to evaluate their imprecise nature for the criterion of power loss minimization, the number or total capacity of DGs and the bus voltage deviation, and then solve the problem using genetic algorithm.

The Relationship of Parental Academic Achievement Pressure to Self-efficacy of Elementary Students : Mediation Effects of Achievement Goals (부모의 학업성취압력이 초등학생의 자기효능감에 미치는 영향 : 목표지향성의 매개효과를 중심으로)

  • Lee, Su Jin;Cho, Sang Chul;Heo, Il Beom
    • Korean Journal of Child Studies
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    • v.29 no.3
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    • pp.289-301
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    • 2008
  • The present study examined the relationship between parental academic achievement pressure and self-efficacy mediated by student's achievement goal orientation among elementary school students. The 638 participants were fifth graders living in a metropolitan area. Analyses revealed that children who were high both in performance-goal and mastery-goal orientation reported highest perceived parental academic achievement pressure and self-efficacy. Performance-goal orientation played a mediation role in the relationship between parental academic achievement pressure and self-efficacy, while mastery-goal orientation did not. The limitations of the present study and suggestions for future research were discussed.

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Update of Sepsis: Recent Evidences about Early Goal Directed Therapy

  • Cho, Woo Hyun
    • Tuberculosis and Respiratory Diseases
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    • v.78 no.3
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    • pp.156-160
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    • 2015
  • Severe sepsis and septic shock is a life-threatening disease. It is combined with multi-organ failure. In the past decade, early goal directed therapy has been proposed as an effective treatment strategy for better outcome. Recent epidemiologic studies showed that the outcome of sepsis has been improved with the introduction of early goal directed therapy. However, it is unclear which elements of early goal directed therapy contributed to the better outcome. Recent prospective and randomized trials suggested that some elements of early goal directed therapy did not have any effect on the outcome benefit. In this paper, recent articles about early goal directed therapy will be reviewed and the effectiveness of individual elements of early goal directed therapy will be discussed.

The Preservice Elementary Teachers' Achievement Goal Orientations for Science Teaching and Their Science Teaching Efficacy Belief (초등학교 예비교사의 과학 교수 목표 지향성과 교수 효능감)

  • Jeon, Kyung-Moon
    • Journal of Korean Elementary Science Education
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    • v.30 no.4
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    • pp.504-513
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    • 2011
  • The preservice elementary teachers' achievement goal orientations(mastery/ability-approach/ability-avoidance/work-avoidance goal) for science teaching were measured. The student teachers(91 males and 127 females) tended to have the mastery or ability-approach goals rather than the ability-avoidance or work-avoidance goals for science teaching. The male students were more learning focused than were the females, while the female students reported stronger work-avoidance goal orientation than did the males. This study also examined how the preservice teachers' achievement goal orientations were related to their science teaching efficacy beliefs(personal science teaching efficacy belief/science teaching outcome expectancy). As expected, the results showed that there were significantly positive relationships between the mastery or ability-approach goals and science teaching efficacy beliefs, while the significantly negative relationships were found between the ability-avoidance or work-avoidance goal and personal science teaching efficacy belief. The educational implications and future directions were discussed.