• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.11a
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• pp.37-42
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• 1999

This paper was studied on change for Marine Administration of telecommunications. Analysis method was studied of Policy Delphi. The three kinds of telecommunications network influence on Marine administration is National Information Infrastructure Network, Integrated Services Digital Network and Local Area Network. The five kinds of telecommunications service influence on Marine administration is Telecommuting Service, Electronic Approval Service, Teleconference Service, Electronic Data Interchange Service, and Internet Service. The results of this as follow: First, all Marine agency must be innovation. Second, Marine Administration must be use Telecommunications. Marine Administration must be for customer.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.50 no.3
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• pp.120-130
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• 2001

We present an approach to parallelizing optimal power flow that is suitable for distributed implementation and is applicable to very large interconnected power systems. This approach can be used by utilities to optimize economy interchange without disclosing details of their operating costs to competitors. Recently, it is becoming necessary to incorporate contingency constraints into the formulation, and more rapid updates of telemetered data and faster solution time are becoming important to better track changes in the system. This concern led to a research to develop an efficient algorithm for a distributed optimal power flow based on the Auxiliary Problem Principle and to study the convergence rate improvement of the distributed algorithm. The objective of this paper is to find a set of control parameters with which the Auxiliary Problem Principle (Algorithm - APP) can be best implemented in solving optimal power flow problems. We employed several IEEE Reliability Test Systems, and Korea Power System to demonstrate the alternative parameter sets.

• Asia pacific journal of information systems
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• v.10 no.4
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• pp.1-20
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• 2000

Electronic Data Interchange(EDI) has the potential to improve business operations by expediting the exchange of business documents. It will also provide substantive operational and strategic benefits to the trading firms. However, the successful implementation of EDI systems requires the mutual trust and cooperation between the trading firms. The extent of EDI diffusion and performance depends on inter-organizational, intra-organizational, as well as innovation factors. Researches based on the sociopolitical process framework in the use of IT, organizational theory, resource dependence theory, and innovation diffusion theory have identified 3 inter-organizational variables(transaction climate, dependence, external IS expert support) and 4 intra-organizational variables(strategic IS planning, infrastructure, top management support, education/training,), and 3 innovation variables(compatibility, relative advantage, cost) that affect EDI diffusion. In this study, a multi-dimensional measure on EDI diffusion has been developed to capture the external and internal integration. Then, the influence of these 10 variables on the extent to which the EDI adopting firms pursue diffusion has been examined. Whether more diffusion leads to superior performance has also been studied. International trade managers from 107 firms in the trade industry participated in a field survey. The results based on a structural equation model(SEM), developed using AMOS, provide quite a strong support for the hypothesized relations. Both education/training and IT infrastructure influenced external and internal diffusion of EDI systems. Internal diffusion of EDI enables the adopting firms to improve operational and strategic performance, whereas external diffusion contributes only to operational performance.

• Asia pacific journal of information systems
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• v.9 no.1
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• pp.165-191
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• 1999

The telecommunications of previous years have been utilized for internal usages, but those in current years have widely extended even to usages for Interorganizational Information System(IOIS) beyond its internal uses. Electronic Data Interchange(EDI), a subsidiary form of IOIS which permits interorganizational electronical exchanges of transaction documents through the telecommunications networks between and among computers, is expected to bring forth various innovative results with improved efficiency and productivity through the improvement and simplification of transaction processes, And it became needed and significant to review studies with practical values and necessity. This study is implemented on the basis of a judgement that Korea businesses can improve some of their structural problems of high costs by successfully adopting and implementing EDI system in their organizations. And it's also realized that more studies on the related subjects will benefit and be valuable for various applications. The major objectives of this research is to identify factors influencing in the implementation of EDI system by Korean business entities. Business which already implementation EDI system in their organizations were subjected to the survey. Also, this study intended to identify variables influencing in the implementation of EDI system and further provide directions needed in establishing or managing EDI system.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2007.11a
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• pp.468-474
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• 2007

가상기업(virtual enterprise)은 21세기에 고객의 요구가 매우 다양해지고 기술은 점점 더 복잡해지는 상황에서 정보네트워크 기술의 발전을 이용한 새로운 기업간 협력을 통해 극복하려는 경쟁전략의 일환이다. 현재까지의 가상기업에서는 주로 EDI(Electronic Data Interchange)를 이용한 국한된 정보의 교류가 이루어졌다. 그러나 이러한 국한된 정보이외에도 실제 가상조직 내에서는 규칙 또는 제약식 형태의 정보의 교류 또한 필요한 실정이다. 이러한 정보의 교류에 시맨틱 웹 플랫폼을 이용하게 되면 더욱 쉽고 유연한 정보의 전달이 가능하다. 현재 웹 온톨로지 언어인 OWL과 시맨틱 웹 규칙언어인 SWRL을 통해서 사실 및 규칙의 포맷은 갖추어져 있는 상황이지만 제약식의 표현에 있어서는 뚜렷한 포맷이 정해져 있지 않아 가상조직 내에서의 구성원간의 제약조건의 교류에 문제가 있는 상황이다. 본 논문에서는 가상기업조직에 있어서 각각의 구성 기업들간의 제약식 공유가 이루어 질 수 있도록, 시맨틱 웹 표현의 대표적 언어인 OWL 기반으로 하는 제약식 표현언어(Semantic Web Constraint Language)를 응용한다. 또한 실제로 이러한 SWCL이 가상기업 문제에 얼마나 효율적으로 적용될 수 있는지 증명하기 위해 실례를 적용해 보고자 한다.

• Korean Journal of Remote Sensing
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• v.24 no.5
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• pp.497-506
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• 2008

The needs for digital models of real environment such as 3D terrain or cyber city model are increasing. Most of applications related with modeling and simulation require virtual environment constructed from geospatial information of real world in order to guarantee reliability and accuracy of the simulation. The most fundamental data for building virtual environment, terrain elevation and orthogonal imagery is acquired from optical sensor of satellite or airplane. Providing interoperable and reusable digital model is important to promote practical application of high-resolution satellite imagery. This paper presents the new research regarding representation of geospatial information, especially for 3D shape and appearance of virtual terrain. and describe framework for constructing real-time 3D model of large terrain based on high-resolution satellite imagery. It provides infrastructure of 3D simulation with geographical context. Web architecture, XML language and open protocols to build a standard based 3D terrain are presented. Details of standard-based approach for providing infrastructure of real-time 3D simulation using high-resolution satellite imagery are also presented. This work would facilitate interchange and interoperability across diverse systems and be usable by governments, industry scientists and general public.

• Nuclear Engineering and Technology
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• v.55 no.8
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• pp.2905-2918
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• 2023

The valve assembly used in nuclear power plants is important safety-related equipment. In the new standard, the physical attributes are measured using a valve diagnosis test, which is used in the expansion to other non-tested valves using a quantitative test-basis methodology. With a motor-operated actuator, the state of stem's lubrication is related to physical attributes such as the stem factor and the friction coefficient. This study analyzed the numerical transient of fluid and solid lubrication with a squeeze film effect due to the loading rate on the stem and the stem nut using the experimental data. The differential equation that governs the motion mechanism of the stem and stem nut is established and analyzed. The flow rate, the fluid and the solid contact forces are calculated with the friction coefficient. Finally, we found that a change in the friction coefficient results from a change of the shear force in the solid contact mode during the interchange process between the solid contact mode and the fluid contact mode. The qualitative understanding of the squeeze film effect is expanded quantitatively for forces, thread surface distance, velocity, and acceleration, with consideration of the metal solid contact and fluid contact.

• Culinary science and hospitality research
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• v.16 no.5
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• pp.149-163
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• 2010

This study planned study model through documentary research and drew hypothesis to analyze how teamwork of servant leadership has an influence on job satisfaction aiming at full time employee under department head and contract worker of five star hotel in Busan. As a survey term, from April 5th, 2010 to April 23th, 2010, it distributed total 300 questionnaires, 60 questionnaires for each hotel, and then 242 questionnaires were used for empirical analysis. It analyzed data using SPSS WIN Version 12.0 statistics package program, and verified through frequency analysis, reliability analysis, factor analysis, regression analysis. As a result of verification for influence of servant leadership on interchange which is one of teamwork, it showed that community formation factor has a positive influence on interchange, and as a result of verification for influence on communication which is one of teamwork, I could find out that higher the level of bond of sympathy formation and community formation factor are, higher the communication becomes. As a result of verification for influence on interdependence which is one of teamwork, it showed that community formation, stewardship, vision, commitment to growth factor have a positive influence on interdependence. As a result of verification for influence of teamwork factor on job satisfaction, it showed that all factors have a positive influence. As a result of this study. I could find out that member' positive perception on leader in hotel organization can be a basis deriving job satisfaction though teamwork.

• Korea Journal of Hospital Management
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• v.6 no.1
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• pp.18-40
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• 2001

This study purports to investigate the readiness of the university hospital employees in the knowledge-based management. Data were collected from 550 employees including administrative, nursing, and technical staff of 9 university hospitals located in Seoul and Kyunggi Province through the self-administered questionnaires. The response rate was 79% and 425 questionnaires were used as final data and analyzed using 2 test, t-test, and ANOVA. The main findings of the study are as follows. 1) It seems that most employees of the study hospitals have basic knowledge on the concept of knowledge-based management. This finding implies that the implementation of the knowledge-based management in Korean university hospitals will not likely to face strong resistance from their employees. 2) The results show that Korean hospital employees are still not so accustomed to using e-mail as the main communication tool. This finding suggests that it is necessary to use various communication tools which include electronic data interchange, teleconference, and cyber chatting for facilitating the knowledge-based management in Korean university hospitals. 3) It is desirable to appoint a chief knowledge officer(CKO) for operating knowledge-based management system effectively. 4) A reward system for employees who show a distinguished performance in the creation and sharing of new knowledge should be established. Knowledge mileage system, selection of the best knowledge employee and team will be a good example of the effective reward system. 5) The participation and support from the chief executive officers (CEO) of the hospitals is an important factor for successful knowledge-based management. Furthermore, to make physicians actively participate in the knowledge-based management is another important factor for obtaining valuable outputs from the system. 6) It is found that the knowledge and skills of the hospitals employees on the information technology (IT) are not sufficient for making knowledge-based management more popular. This implies that it is very important to select IT-oriented employees and educate them continuously on the knowledge-based management.

• Journal of Korean Academy of Nursing
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• v.33 no.1
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• pp.122-129
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• 2003

Purpose: The purpose of this study is to examine the difference of direct nursing activity and patient outcomes as mortality rate, complication rate, readmission rate and length of stay related to graded fee of nursing management for inpatient. Method: The subjects of this study were 44 general hospitals with more than 500 beds. Data totaled to 86,044 claims provided to inpatients in Jan. 2001 requested by an electronic data interchange from a Health Insurance Review Agency. The data was analyzed by SPSS win(ver.10.0) and statistical methods used were frequency, one-way ANOVA, $X^2$-Test and regression. Result: Synthetic judgment through performance index and 95% confidence interval, direct nursing activity showed to provided adequate quality of nursing care on 2nd, 3rd, 4th and 6th nursing degree. Also, patient outcomes showed difference by graded fee of nursing management for inpatient. Mortality rate of 2nd was the lowest with P.I. 67.9, 3rd, 5th, 6th, 4th in order. In case of complication rate, 2nd, 3rd and 4th were lower than other nursing degree. Readmission rate of 4th and 5th was the lowest. Length of stay of 2nd was the shortest with P.I. 88.3, 3rd, 4th, 5th, 4th, 6th in order. Conclusion: The findings from this study showed that, the higher nurse-to-patient ratio, the greater amount of direct nursing care activity for the patient. Also, the more direct nursing activities influenced a lower mortality rate, complication rate and readmission rate, shorter length of stay.