• Korean Management Science Review
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• v.13 no.2
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• pp.25-48
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• 1996

Mixed Model Assembly Lines (MMALs) are increasingly used to produce differentiated products on a single assembly line without work-in-process storage, Usually, a typical MMAL consists of a number of (1) stations doing exactly the same operation on every job, (2) stations involving operations with different choices, and (3) stations offering operations that are not performed on every job, or that are performed on every job but with many options. For stations of the first type there is no sequencing problem at all. However, for the second type a set-up cost is incurred each time the operation switches from one choice to another. At the third type of stations, different models, requring different amounts and choices of assembly work, creates an uneven flow of work along the line and variations in the work load at these stations. When a subsequence of jobs requires more work load than the station can handle, it is necessary to help the operations at the station or to complete the work elsewhere. Therefore, a schedule which minimize the sum of set-up cost and utility work cost is desired. So this study has developed Fixed Random Ordering Rule (FROR), Fixed Ascending Ordering Rule (FAOR), Fixed Descending Ordering Rule, and Extended NHR (ENHR). ENHR is to choose optimal color ordering of each batch with NHR, and to decide job sequence of the batch with it, too. As the result of experiments, ENHR was the best heuristic algorithm. NHR is a new heuristic rule in which only the minimum addition of violations from both partial sequence and unassigned sequence at every branch could be considered. And this is a heuristic sequencing rule for the third type of stations at MMAL. This study developed one more heuristic algorithm to test the performance of NHR, which is named as Practical Heuristic Rule (PHR).

• Journal of Environmental Impact Assessment
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• v.16 no.2
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• pp.107-120
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• 2007

The introduction of strategic environmental assessment (SEA) has strengthened and extended the value of environmental impact assessment (EIA) as a foundational tool for sustainable development. In particular, SEA helps to overcome the limitation of project EIA as a 'stand alone' approach, applied relatively late in the decision making cycle. SEA is applied to policy, plan and programme (3P) proposals, when major alternatives are open and systematic consideration can be given to their environmental effects. This process also corresponds to options appraisal of development proposal to find the best practical outcome having regard to all potential impacts. There are imperatives for sustainable development (SD) that are shaping future directions for EIA and SEA internationally, regionally and locally. There is a shift toward more integrative approaches of using EIA and SEA as sustainability tools in cooperated environmental management system (EMS). Korea has established and applied EIA for over twenty years for various projects. Given its coverage, the current EIA system is SEA exclusive. The Prior Environmental Review System (PERS), which is a SEA-type of system, was applied in the late 1990s, mainly for various developing planning programs. The current PERS has been modified as a SEA type system, but in general, policy is not going to be covered.

• Journal of the Korean Society for information Management
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• v.21 no.2
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• pp.23-44
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• 2004

This study proposed a theoretical framework that could explain the service use of a community informatics. The proposed community informatics use model was developed based on three theoretical models: (1) Ajzen's Theory of Planned Behavior (TPB) from social psychology: (2) Uses and gratifications approaches from media use research; and (3) Technology Acceptance Model(TAM) from information technology use research. The proposed model consists of three basic components: expectations of the outcomes from use, approvals from important others, and perceivied controllability over using the service. The initially proposed model was assessed using structural equation modeling, and then re-sepcified in order to propose a better fitting model. The initially proposed and revised community informatics use models were discussed with their theoretical and practical implications.

• Journal of the Korean Society for information Management
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• v.33 no.4
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• pp.159-174
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• 2016

In order to apply the concept of switching costs to the library context, this study aims to identify library users' perceived switching costs, develop and validate a measurement scale for switching costs. A survey involving 210 university students was performed in order to examine the influence of switching costs on the affective commitment and behavioral commitment. Library users' perceived switching costs refer to the procedural and relational costs involved in switching from one library to another. The results of this study show that two types of switching costs as well as library service satisfaction have positive influences on affective commitment, which in turn affects behavioral commitment. The theoretical and practical implications of this study are discussed.

• Journal of the Korean Society for information Management
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• v.34 no.3
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• pp.67-87
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• 2017

This study aims to investigate the effects of college students' library satisfaction on college life satisfaction. In order to test this relationship, two surveys were conducted involving 360 college students at two universities in Seoul. The results of the first survey show that after controlling for the educational service satisfaction and facilities satisfaction, there is a significant influence of college students' library satisfaction on college life satisfaction. The second study added variables for the three components of library service quality (librarian service quality, library resources and service quality, and library facilities and environmental quality). The results of the second survey show that there is a significant influence of library service quality on college library satisfaction, and again a significant influence of college students' library satisfaction on college life satisfaction. Moreover, the results of two group analysis show that the influence of college library satisfaction on college life satisfaction is stronger in high usage group than low usage group. The theoretical and practical implications of this study are discussed.

• Journal of the Korean Society for information Management
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• v.35 no.3
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• pp.165-187
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• 2018

Despite repeated efforts to develop a methodological foundation for assembling collaborative authority data in South Korea, issues such as the establishment of a standard authority model and standard authority construction as well as the reconfiguration of existing entities in authority building have prevented such research from generating a cooperative push for nation-wide authority data and progressing toward concrete implementation. The formulation of a collaborative and well-utilized collection of national authority data accordingly calls for 1) a practical approach to supporting both established authority data contributors and newly organized avenues of mutual participation in authority building, 2) committed involvement on the part of national institutions capable of providing the project with sustained assistance, and 3) a standard identification system which allows multiple organizations to merge their data. This study addresses the challenges of the current environment by taking stock of the key components necessary for the creation of collaborative authority data and using a Semantic Web-based interoperable VIVO ontology model to propose a viable national authority data framework.

• Journal of the Korean Society for information Management
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• v.35 no.3
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• pp.245-270
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• 2018

In order for school library to fully serve as a key educational element of a school, teachers' positive perception on the library's role is essential. Due to the lack of the perception, however, school libraries are not closely related to class activities in practice. Since teachers' perception on school library has been regarded as an given environmental factor in the field of school libraries, alternatives for revitalizing school libraries proposed in previous studies were not effective in practice. We developed a hypothesis that activities in school libraries have a certain impact on the teachers' perception, and tested the hypothesis and identified library factors to the perception in this study. Through a series of statistical analyses with the data from a questionnaire survey with teachers in elementary schools, we identified that the teachers perceived the library as non-curricular element, their perceptions were affected by the library. Consequently, the school library can influence the teachers' perveption. This study has implications to explore practical alternatives to improve the teachers' perception on school libraries by activities in school libraries.

• The Korean Journal of Health Service Management
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• v.6 no.1
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• pp.195-203
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• 2012

The purpose of this study was to identify clinical practice (clinical training education) and satisfaction depend on university hospital availability according to a survey with 850 healthcare-affiliated students. The collected data were analyzed with the SPSS17.0 program. The result was shown statistically significant difference depends on gender, major departments and satisfaction of college life. In addition, there were significant differences in satisfaction of clinical training education in the environmental aspects of practice depending on whether affiliated hospital or not. There were no significant correlation found between degree of satisfaction of clinical training education and the need for affiliated hospital (r = .204, p <.01). As a result, Attached to the university hospital can be helpful to healthcare-affiliated students on environmental and educational aspects of clinical training education. Therefore, the effective and practical training programs using university-affiliated hospitals are surely needed to develop and to apply the active support.

• Journal of the Korean Society for information Management
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• v.27 no.3
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• pp.83-102
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• 2010

This study aims to understand and compare the characteristics of two major approaches to solving global environmental problems - an academic approach including scholarly activities of environmental sciences and a practical approach of environmental movements led by NGOs - by employing informetric analysis methods. Knowledge structure of environmental sciences is depicted through co-citation networks of subject categories assigned to the cited journals in the discipline of environmental sciences for the 10-year period from 2000 to 2009. Furthermore, major interests of environmental NGOs are identified on the basis of external link data collected from web sites of the NGOs. Co-word analyses are also performed using the texts of journal papers in environmental sciences as well as news articles provided by NGO sites. Through the analyses, dominant subject areas of environmental sciences and environmental movements are identified demonstrating similarities and differences between the two approaches.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.40 no.1
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• pp.24-30
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• 2007

We developed an ecosystem indicator (EI) for the coastal and offshore areas of Korean waters. One of the major scientific challenges of this undertaking was to translate broad policy statements for ecosystem-based fisheries management (EBFM) into practical terms. Fish reproduction potential (FRP) was defined as an EI to describe the reproductive probability of adult fisheries resources in Korean waters. The FRP was estimated as the ratio of adult fish composition to total catch, catches (in metric tons) by species and by ecosystem, and fishery effort (in horse power per metric ton). The FRP indices of the East/japan Sea Ecosystem (EJSE), Yellow Sea Ecosystem (YSE), and East China Sea Ecosystem (ECSE) began to decrease after the mid-1980s, and the current indices have decreased further, at 0.63 (EJSE), 1.22 (YSE), and 0.68 (ECSE) index points compared to the indices of 1975, when similar catch amounts were recorded. Lower FRPs in the Korean marine ecosystems were the result of higher proportion of immature fisheries resources in the total catch. Because this kind of ecosystem-level indicator is thought to reflect scientific approaches to EBFM and to provide an important tool for assessing the current status of marine ecosystems with respect to both quantity and quality, more EIs should be developed for Korean waters.