• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.1417-1421
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• 2005

현실에서 실제 존재하는 문제들은 단일 목적이 아닌 다수의 목적들로 이루어지는 경우가 대부분이다. 수자원 분야의 저수지군 연계운영 경우 용수공급 부족량의 최소화, 저수량의 최대화, 발전량의 최대화, 그리고 수계외 유출량의 최소화 등의 다중목적들로 이루어지는데 저수량의 최대화와 발전량의 최대화처럼 서로 상충되는 목적들이 존재하게 된다. 따라서 저수지군 연계운영 효과를 극대화하기 위해서는 위와 같이 상충되는 목적들 간의 trade-off를 고려한 여러 대안을 도출하여 댐운영 의사결정자들 간의 협의를 통한 적절한 대안이 선택되어야 할 것이다. 이를 위해서는 자료의 공유가 필수적이며 각 의사결정자들의 요구사항 및 평가기준들이 합리적으로 수용되어야 할 것이다. 본 연구에서는 웹을 활용하여 의사결정자들에게 상충된 목적들에 대하여 실시간으로 대안을 제공하고 의사결정자들의 의사를 바탕으로 합의된 저수지군 연계운영 방안의 도출을 지원하는 웹 기반 다기준 그룹의사결정지원 모형을 구현한다. 합의된 해 선정을 위한 대안들은 CBITP(CHIM based Interactive Tchebycheff Procedure)를 활용한 다중목적 계획법에서 제시한 방안들을 이용하며 그룹의사결정은 PROMETHEE(Preference Ranking Organization Method for Enrichment Evaluation) 기법을 사용한다.

• Journal of Industrial Convergence
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• v.22 no.1
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• pp.1-20
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• 2024

Regarding the discourse on the correlation between governmental financial support and firm performance, much emphasis has been placed on the role of individual corporate characteristics as well as spatial features. However, there is a notable scarcity of empirical research examining the integrated impact of corporate and cluster characteristics on managerial performance. This study addresses this gap by empirically analyzing the financial and non-financial outcomes resulting from specific allocations of governmental financial support. Additionally, it explores corporate and cluster characteristics predicted to moderate the influence between governmental financial support and firm performance. The analysis employs a two-level hierarchical linear model (HLM) at individual and group levels. The data, reorganized based on business registration numbers at the firm and cluster levels, ultimately utilized panel data from 83,395 firms and 641 clusters. The research findings indicate that governmental financial support demonstrates a positive effect (+) on both sales and patents for firms, suggesting its effectiveness in complementing market failures. Results from the hierarchical linear model analysis show that when combined with human capital capacity, absorptive capacity, and cluster network density, governmental financial support exhibits significant positive effects on sales. This study contributes theoretical and practical insights by analyzing the relationship between governmental financial support and firm performance using a two-level hierarchical linear model. It highlights the role of corporate characteristics such as human capital and absorptive capacity, along with cluster characteristics like cluster network density, in moderating the effects of governmental financial support on firm performance.

• Korean Journal of Culture and Social Issue
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• v.23 no.4
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• pp.527-556
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• 2017

The purpose of this study was to examine the effect of group success on organizational commitment in organizational situations. It also aimed to investigate the dynamics in the relevance of motivational attitudes to the individual and group level variables(collective efficacy, group cohesiveness). This study used a multi-level model and tested a series of hypotheses through meso-mediation procedure. The results from 613 naval officials in 36 groups provided evidence that; (1) collective efficacy mediated the relationship between group success and group cohesiveness, (2) the cross-level main effects of group success and collective efficacy were shown on vocationa[l self-efficacy, (3) group cohesiveness exerted positive influence on organizational commitment and (4) the meso-mediation effects among the variables at the multi-level were revealed. It was found that the degree of work motivation and motivational attitudes depended on the group's contextual factors, and that each group's shared perceptions on group performance outcomes could be an important motivational source and cornerstone leading to group cohesiveness. The implications and limitations of these study as well as the direction for future study were discussed.

• Journal of Korean Society of Transportation
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• v.26 no.4
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• pp.195-204
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• 2008

Multi-Criteria Analysis is one method for optimizing decisions that include numerous characteristics and objective functions. The Analytic Hierarchy Process (AHP) is used as a general Multi-Criteria Analysis considering many critical issues. However, since validation procedures for the decision reliability of AHP valuers had been left off existing methodologies, a new methodology including such validation procedures is required to make more reliable decisions. In this research, idea decision results are derived using Monte Carlo Simulation in cases where AHP valuers do not have expertise in the specific project, and these results are compared with the results derived from experts to develop a new analysis model to make more reliable decisions. Finally, this new analysis is applied to various field case studies of road and rail carried out by the Korea Development Institute (KDI) between 2003 and 2006 to validate the new analysis model. The study found that approximately 20% of decisions resulting from the existing methodology are considered prudent. In future studies, the authors suggest analyzing the correlation between initial weights and final results since final results are enormously influenced by the initial weight.

• The Korean Journal of Applied Statistics
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• v.35 no.3
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• pp.357-370
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• 2022

In this paper, Tobit and Heckit models are introduced. These models have been used for analyzing censored data. Censoring occurs at a specific point and a large number of observations are distributed with a positive probability at a certain point. Censoring can occur due to observing limitation or exogenous variables. Tobit and Heckit models are used to correct sample selection bias, which can occur when an ordinary linear regression model is fitted to censored data. However, the difference between the two models is not clearly accounted for; hence, they have often been used interchangeably. Therefore, the suitability of the models was validated through simulated data, and demonstrated through real data. As the result, it was confirmed that both Tobit and Heckit models are well-fitted to the data censored due to observing limitation, although Tobit model was fitted parsimoniously. In contrast, only Heckit model is well-fitted to the data censored due to exogenous variables.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.14 no.6
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• pp.143-153
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• 2019

This study This study analyzed the effectiveness of Corporate Entrepreneurship, using Human Capital Corporate Panel (HCCP) data from 2017. The attitude of workers, which is main link in the process of corporate entrepreneurship, has been studied at a singular level at individual and organizational levels due to the lack of data and analysis methods. Multi-level analysis using hierarchical and linear modeling was performed to improve the accuracy of the relationship estimation between variables. In addition, this study examined the moderating effect of the organizational level in the process of entrepreneurship. As a result, corporate entrepreneurship has had a positive effect on job satisfaction and turnover, which is due to the employees attitude and organization. Organizational trust in the process has been shown to perform an important role in the relationship between the corporate entrepreneurship and job satisfaction, and that the relationship between the corporate entrepreneurship and turnover has not been controlled. Based on these results, the implications, limitations, and future research tasks of the study are discussed.

• Research in Community and Public Health Nursing
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• v.21 no.1
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• pp.92-100
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• 2010

Purpose: This study was carried out to investigate the effects of improvement in self-rated health, self-efficacy, perceived benefit and health promotion behavior by running a health promotion program through the coalition of industries, universities and districts. Methods: This study was designed as non-equivalent control group research. Data were collected from 62 participants in a health promotion program who were enrolled in a community center (experimental group: 29, control group: 33). The program was applied from October to November, 2008. The health promotion program was composed of value, competence, action, and policy based on a multi-level health promotion model. Collected data were analyzed through $x^2$ test, t-test, and Wilcoxon test. Results: After participating in the health promotion program, the experiment group showed statistically significant increases in self-efficacy, perceived benefit and health promotion behavior but not in self-rated health. Conclusion: It was proven that the health promotion program enhanced the health promotion level in the community.

• Journal of Korea Planning Association
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• v.54 no.5
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• pp.76-90
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• 2019

The purpose of this study is to analyze the survival characteristics of the restaurant business by trade area type (major and side street). By the increase of the unemployment rate, the new foundation of selt-employment type is increasing. However, due to high competition and economic recession, the sustainability of new foundation is not high. Therefore, in this study, survival analysis was performed considering the individual and commercial characteristics focused on the ordinary restaurants. The major findings are as follow. First, the characteristics of parcel unit and adjacent area have a significant effect on the survival. This means the micro-scopic spatial characteristics should be considered for survival in the location choice. Second, the regional economic characteristics in trade area have a significant effect on survival. Furthermore, these characteristics are different by the trade area type. Third. the development characteristics have a different effect on survival by the building usage and trade area type. Finally, regional economic characteristics have a significant effect on survival. These results are expected to be used as basic data for commercial location selection and trade area analysis system in the private and public sectors.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.5
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• pp.905-914
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• 2017

We examine 554 state basic districts and 1832 householders in Busan metropolitan city to see whether the physical and walkable characteristics of housing influence apartment housing prices. We use two-level models modeling for a more accurate analysis. Walkable characteristics in level 2 state basic districts potentially explain 77% of the variation in housing values, with the highest impact on crime safety characteristics. Overall, our spatial multi-level analysis based on new state basic districts in Korea explained price variation better than previous studies, which considered each householder. The results provide policy opportunities for planners and citizen groups to pursue strategies that encourage the development of walkable and sustainable neighborhoods.

• Journal of Korea Technology Innovation Society
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• v.17 no.1
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• pp.146-173
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• 2014

Extant studies have explained that firm's innovations including technological product and process innovations contribute to its competitive advantage and growth, thereby supporting competitiveness and growth of industry. These studies, however, have focused mainly on the role and effect of technological change that is primarily measured by the patent numbers and R&D intensity. Aside from these traditional streams, there has been growing interest on the impact by various dimensions of innovation including non-technological innovations. Apart from the discussions on the dimensions and scope of innovation, stages or processes of innovation also have been studied. Extant studies on innovation process model, however, has limited its interests in the structure of the transformation of knowledge. This study have established a comprehensive model embracing operational and financial performance to investigate the causal paths between innovation and firm performance. Using multi-level generalized linear model with path analysis, this study have found results as follows: First, the processes from innovative activities to innovation output and outcomes including operational and financial performance at firm level were verified. Secondly, the influence of innovation decreases gradually as the distance away from the direct outputs of the innovation increase in the direction of financial outcomes. Third, the effect of innovation on the sales growth rate is higher for small businesses than for medium-sized businesses. The effect of innovation on the profit rate, however, is significant only for medium-sized businesses. For large businesses, innovation has no positive significant impact on any financial performance at all. Fourth, Fourth, the appropriability of innovation has positive impacts on innovative performance, patent applications, and operational performance.