• The Journal of Information Systems
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• v.14 no.1
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• pp.67-85
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• 2005

This study is to find out empirically the success factors on the development stages of e-business in Korean enterprises, to formulate e-business strategy and to decide e-business policy. For this purpose, the study reviews the conceptual framework on the success factors for the development stages of e-business and the data is collected from 304 companies implementing e-business. The study is conducted in three ophases an follows; First, according to this study, the development stage of e-business in Korean Enterprises is between 'Information Access Stage' and 'Core Business Transaction Stage'. Second, four factors comsisted of 29 items derived from factor analysis are named as 'Environmental Adaptation','Customer Relationship management','Marketing' and 'Environment of Organization'. Third, the success factors of first stage(Information Access Statge) include 'Marketing' and 'Environmental Adapotation', the success factors of second stage(Electronic Collaboration Stage) include 'Environmental Adaptation' and 'Environment of Organization' and the success factor of third stage(Core Business Transaction Stage) include 'Environment of Organization'. The results of this study show that; 1) the Korean enterprise seems to be in the Electronic Collaboration Stage of e-business development, and 2) the success factors are 'Marketing' for first stage, 'Environmental Adaptation' for second stage, and 'Environment of Organization' for third stage.

• Convergence Security Journal
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• v.11 no.1
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• pp.49-56
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• 2011

Recently, the army make plans for the development of new conceptual military vehicles. As the development of military vehicles, we need selecting of considerable factors for solution of user's additional requirements, systematic and efficient development management of military vehicles. For this study, we made up questions from 4 specialist's groups about military vehicles as manager group, operator group, maker group, researcher group. There were 22 selected factors in the result of gathering the specialists' opinions and the result of this study will useful for hereafter development of military vehicles.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.753-755
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• 1993

Full Bridge Diode Rectification and Phase Controlled SCR Rectification are the most widely used methods of power conversion($AC{\rightarrow}DC$) in Power Electronic products such as UPS systems. But using these types of converters can lead to the following problems. First, they generate harmonics on the AC input side, which can cause interference in other equipment connected to the same commercial power line. Second, they deteriorate the power factor so that the input power capacity or the equipment becomes larger than the actual rated output capacity. As a means to overcome these problems an IGBT type PWM Converter, which applies a current control algorithm, is proposed. In this paper the enhancement of the converter performance is shown through simulation.

• Journal of Distribution Science
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• v.19 no.5
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• pp.5-12
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• 2021

Purpose: Research on supply chain sustainability is important for exporters When the factor of sustainable development is considered by the businesses as well as governments of all countries. Research on supply chain sustainability is important for exporters. Sustainable supply chain management and supply chain dynamics will help enterprises adapt to changes in the business environment. This study analyzes the impact of sustainable supply chain management, and supply chain dynamic capabilities on the sustainable development of exporting enterprises in Vietnam. Research design, data, and methodology: The research model and survey are designed based on previous studies after surveying export enterprises. With 185 samples collected from export enterprises. The Structural Equation Modeling (SEM) analysis technique is used. Data analysis is performed on SPSS and AMOS software (Reliability test, Confirmatory Factor Analysis, SEM). Results: Sustainable supply chain management and supply chain dynamic capabilities all have positive effects on the sustainable development of businesses (sustainable development is measured by distribution: measuring economic efficiency, social efficiency, and environmental performance). Conclusions: From the results of this study, the authors also made several recommendations to help export enterprises develop sustainability based on sustainable supply chain management and supply chain dynamic capabilities.

• Molecules and Cells
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• v.44 no.5
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• pp.292-300
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• 2021

Macrophages residing in various tissue types are unique in terms of their anatomical locations, ontogenies, developmental pathways, gene expression patterns, and immunological functions. Alveolar macrophages (AMs) reside in the alveolar lumen of the lungs and serve as the first line of defense for the respiratory tract. The immunological functions of AMs are implicated in the pathogenesis of various pulmonary diseases such as allergic asthma, chronic obstructive pulmonary disorder (COPD), pulmonary alveolar proteinosis (PAP), viral infection, and bacterial infection. Thus, the molecular mechanisms driving the development and function of AMs have been extensively investigated. In this review article, we discuss the roles of granulocyte-macrophage colony-stimulating factor (GM-CSF) and transforming growth factor (TGF)-β in AM development, and provide an overview of the anti-inflammatory and pro-inflammatory functions of AMs in various contexts. Notably, we examine the relationships between the metabolic status of AMs and their development processes and functions. We hope that this review will provide new information and insight into AM development and function.

• Food Science of Animal Resources
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• v.44 no.4
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• pp.966-966
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• 2024

• Korean Journal of Construction Engineering and Management
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• v.10 no.5
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• pp.37-46
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• 2009

This research will focus on the public agencies, designers, supervisors, building cooperation, and contractor who involved in urban development plan. By understanding the complexity and the priorities in urban development process, all problems of the urban development projects can be solved or improved. These priorities are specified using AHP (Analytic Hierarchy Process). A questionnaire survey is employed to identify the problems of urban development process and the methods of revitalizing urban in this research. Through the survey, 35 issues are drawn out. Factor analysis technique is applied to extract the underlying interrelationships possibly existing. Using latent root criterion and varimax rotation method, 9 factors are extracted(by using 34 issues after deleting 1 issue less than 0.4 of factor loading) These 9 factors named as PIF (Problem Improvement Factor) consist of integration estimation (PIF1), cooperation operation capability (PIF2), contractor corporation capability (PIF3), capital for infrastructure investment (PIF4), misunderstanding of effective land use (PIF5), financial capability (PIF6), obscure goal of project (PIF7), shortage of cooperation expertise (PIFS), administrative procedures (PIF9). PIF 6 is the most important factor and PIF 1 is the most widely effective factor to succeed urban land development projects. It is recognized that administrative office is most responsible for PIF1 cooperation is most responsible for PIF2, 7, 8 and 9; contractors is most responsible for PIF3 and PIF6; administrative agencies is most responsible for PIF4; cooperation and consultants are responsible for PIF5. From findings in this study, some suggestions are proposed for the revitalization methods of urban development projects through the land readjustment method.

• Proceedings of the KIEE Conference
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• 1996.07a
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• pp.619-621
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• 1996

This paper presents the study on the development of the power factor correction convener with ZVT Boost converter, which is better than the conventional PWM Boost converter to increase the switching frequency for high density and lower stress of switch. A simple DC and small signal model for the power factor correction converter with constant switching frequency is derived. The guide line for design of controller is summarized.

• Journal of Korean Society of Forest Science
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• v.97 no.2
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• pp.152-155
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• 2008

The Korean version of Perceived Restorativeness Scale was administered to 150 SanEum Recreational Forest visitors to investigate it's psychometric properties. Factor analysis revealed that the scale consists primarily of four factors related to compatibility, preference, being away and coherence. The internal consistency of the scale was positive. Based on these tests, it appears that the scale is a sound measure of restorativeness or psychological health benefits from forest experience.

• Proceedings of the KIEE Conference
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• 1999.07f
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• pp.2789-2791
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• 1999

This paper deals with the design of the HPS electronic ballast, which consists of the ignitor for turning-up and the resonant converter for driving the lamp. Also it contains Power Factor Controller to improve the electronic efficiencies such as power factor, crest factor, low distortion, etc. To make this circuit, it is necessary to simulate it on the computer before we implement it actually. In this paper, we try to modelize the HPS lamp and ballast, and have experiments with 150 watt-HPS lamp from Kwangjunsa.