• Journal of Korean Society of Industrial and Systems Engineering
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• v.45 no.3
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• pp.204-213
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• 2022

Most of the prior studies on the servitization of manufacturing companies have been actively studied, focusing on the performance and cases of servitization at the single company level. According to the results, most of the servitization at the single company level has been expanded based on the relevance of the company's core products. However, the form of companies that form a large axis of the Korean economy is a large-scale business group, and these business groups incorporate service affiliates for various purposes, so they show different characteristics from that of a single corporate. In addition, since the purpose of forming a business group is different for each business group, the service relevance between affiliates within the business group is different. Therefore, this study aims to examine the effect of service relevance between affiliates within a business group on the management performance of each business group. To this end, an empirical analysis will be conducted using panel data for 10 years from 2011 to 2020 for a total of 98 affiliates listed on KOSPI and KOSDAQ of 9 domestic business groups. Based on these results, the direction for improving management performance and establishing future servitization strategies for large business groups in Korea will be expected to be made.

• Journal of the Korea Society for Simulation
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• v.16 no.4
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• pp.33-41
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• 2007

Service-Oriented Architecture(SOA) define the interaction method between two computing entities that one entity performs a unit task instead of another entity. This, unit task, is called "Service" and interaction of these services should have independency and loosely coupled task. The effect of SOA's main functions such as loosely coupled task and independent interoperability with influence the possibility of flexible message communication between different way and different users. In this article, we analyzed the performance about system stabilization between general web service and SOA based application that implemented through WCF based messaging framework using .NET Framework and integrated data presentation method. As the result of test, we confirmed that SOA environment using WCF have more advantages.

• Journal of Information Technology Services
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• v.12 no.1
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• pp.323-340
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• 2013

As the importance of collaboration becomes critical in today's open and complex business environment network, the issues and solutions on compatibility and reusability between different kinds of applications are being increasingly important as well in systems analysis and design. And therefore, service-centered SOA is receiving attention in such business environment as a strategic approach that makes possible for prompt action according to the needs of users and business process. Various implementation methodologies have been proposed for SOA, however, in practical aspects most of them have some problems since they fail to propose specific policies in definition and identification of services for the exact user requirements and business situations. To solve or alleviate those problems, this paper suggests a new service identification model based on hierarchical ontology, where three different ontologies such as business ontology, context ontology and service ontology are proposed to define the relationship and design the link between user requirements, business process, applications and services. Through a suggested methodology in this paper, it would be possible to provide proactive services that meets a variety of business environments and demands of user. Also, since the information can be modified adaptively and dynamically by hierarchical ontology, this study is expected to play a positive role in increasing the flexibility of systems and business environments.

• Journal of the military operations research society of Korea
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• v.2 no.1
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• pp.177-184
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• 1976

As the organizational size of a military service or business increases and its management becomes complex, the success in its management depends less on static type of management but more on careful, dynamic type of management. In this thesis, an operations research technique is applied to the problems of determining optimal air traffic control rule and of optimal capacity of air base for a military air base. An airport runway is regarded as the service facility in a queueing mechanism, used by landing, low approach, and departing aircraft. The usual order of service gives priority different classes of aircraft such as landings, departures, and low approaches; here service disciplines are considered assigning priorities to different classes of aricraft grouped according to required runway time. Several such priority rules are compared by means of a steady-state queueing model with non-preemptive priorities. From the survey conducted for the thesis development, it was found that the flight pattern such as departure, law approach, and landing within a control zone, follows a Poisson distribution and the service time follows an Erlang distribution. In the problem of choosing the optimal air traffic control rule, the control rule of giving service priority to the aircraft with a minimum average waiting cost, regardless of flight patterns, was found to be the optimal one. Through a simulation with data collected at K-O O Air Base, the optimal take-off interval and the optimal capacity of aircraft to be employed were determined.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.6
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• pp.1343-1355
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• 1997

Full motion video data is the most effective data type that transmits information in multimedia enviornment. VOD service is system that uses network to transmit full motion video data interactively. Therefore VOD service system must satisfy the following requirements. First, it should transmit high quality full motion video. Second, it should be able to control a large quantity of full motion video. Third, a user should be able to retrieve the full motion vide effectively. However the existing VOD service system is established based n file system that not only does it have disadvantages in managment such as transaction control but also it is not suitable for distributed multimedia environment. The goal of this research is to build a VOD service system that provides high-quality full motion video assuming information retrieval. In order to mainly search video data's bibliographical information and to manage related information, VOD service system and DBMS system are to be closely related. Also, to transmit high quality full motion video data, we use MTP$^{TM}$(Media Transfer Protocol) developed by StarLight. MTP$^{TM}$ guarantees high bandwidth that is necessary to tansmit high quality full motion video data effectively. In other hand TCP/IP which is used for information search does not guarentee high bandwidth as that in MTP$^{TM}$. Therfore VOD service system that seraches information managed by DBMS and transmits requried full motion video data should control different kinds of protocol simultaneously. This paper describes the configuration of VODB system that has solved these problems, implementation and efficiency of data applied system.stem.

• Journal of Internet Computing and Services
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• v.7 no.3
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• pp.13-30
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• 2006

In this paper, a telematics service platform, which supports the management and diagnosis of automobile and controls the automobile's convenience equipment is designed and implemented. Using the service platform, telematics software can be developed independent of the lower part of automobiles's network devices, each hardware devices, and wireless network devices. The platform classifies each device's service and provides it with the fixed form of API(Application Programming Interface). This API consists of the wireless connection for a mobile device, the CAN network for controlling an automobile, the receiving part of GPS data for location base service, and the message parser for different data formats of different network.

• Korean Journal of Human Ecology
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• v.20 no.3
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• pp.561-582
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• 2011

The purpose of this study was to investigate the current status of pre-service curriculums for child care teachers at universities and colleges in Korea. To accomplish this, a survey was implemented to gather the lists of courses from each department training pre-service child care teachers. A total of 225 departments at universities and colleges across Korea participated in the survey. The results showed that the 37 different courses offered for child-care teacher licensure were different by school type (university or college) and major. Departments in colleges with specific majors such as early childhood education and social welfare offer courses that are also required for other certificates, including kindergarten teachers or social workers, so pre-service child care teachers may not have the opportunity to take courses specifically designed for their specific teaching needs or interests. Accordingly, there may be a restricted number of courses from which to choose during pre-service training periods. Based on the findings from this study, several political implications for improving child-care teacher professionalism were suggested.

• Journal of Korea Society of Industrial Information Systems
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• v.21 no.3
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• pp.57-71
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• 2016

Even though the Korean military continued to develop military logistics support systems, sufficient research on logistics service has not been conducted. The main purpose of the research is to examine employees' job satisfaction of logistics units by logistics functions (the ordnance, the supply, the food), and further the relationship between the job satisfaction of logistics units and service quality of the user(combat) units. Some results are as follows. First, the job satisfaction among logistics units was significantly different by functions. Second, the tangible among service quality factors of user units was been significantly different among functional units. Finally, through the post hoc analyses, some meaningful results on service quality were also identified.

• Journal of the Korean housing association
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• v.19 no.1
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• pp.39-48
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• 2008

The purpose of this study was to examine the characteristics of service facilities, and needs for service facilities using for leisure in multi-family housing properties. The multi-family housing complexes in Seoul were selected in this study. Site visits, analysis of drawing of complex and questionnaire survey were conducted. The statistical techniques used for data analysis included frequencies. The research results were as follows; The studied apartment complexes provided the appropriate and adequate service facilities in accordance to the regulations of multi-family housing. Playground for children, senior center, resting place were found in all the complexes, but the presence of exercise facilities, shared spaces, green spaces, and community parks was somewhat different across the studied complexes. Satisfaction with leisure facilities were different with the apartment complexes. The respondents who had lived older apartment complexes were more likely to increase dissatisfaction, and the reason was attributed to no presence of the leisure facilities they wanted to use. The respondents said that such service facilities using for leisure facilities as playground for children, senior center, community parks, walkways, reading room, and fitness center were highly needed.

• Journal of the FoodService Safety
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• v.2 no.1
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• pp.36-43
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• 2021

The development of food poisoning prevention guidelines aims to prevent food poisoning in advance and improve the safety of children's meals through hygiene management of children's feeding facilities, especially infants' facilities. Therefore, the composition of the content should be designed so that it can be fully understood from the point of view of the layperson. In terms of meal service management, various standards must be fully reflected and reviewed to increase utilization in the field. Daycare centers and kindergartens have different administrative agencies, similar application laws and guidelines, but different parts exist and various types of facilities, so management standards are often ambiguous. Therefore, such management requires easy guidance, not special guidance, and it should be universally applicable to any facility. Prior studies have shown that the management of meal facilities is the most efficient, but it is difficult to hire and deploy specialists due to the operation of children's meal facilities, so guidance, facilities managers and workers need to voluntarily practice them. It is time to prepare hygiene guidelines that reflect the characteristics of these children's cafeterias, and it is necessary to prepare and utilize guidance suitable for reality until it is institutionalized for the deployment of manpower exclusively for meals.