• Journal of Soil and Groundwater Environment
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• v.18 no.1
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• pp.1-5
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• 2013

Global climate changes affect the local hydrologic cycle, and subsequently, require changes in water resource management strategies of Korea. Variations in precipitation and urbanization have adverse effects on the reasonable and efficient utilization of groundwater resources. Groundwater management strategies of Korea have been implemented based on the evaluation of "sustainable yield", which is calculated from the amount of annual recharge. However, this sustainable yield has no consideration of natural discharge and dynamic equilibrium of the groundwater system. Therefore, for the effective groundwater management strategies of the following decades, we need representative and reliable observations, and have to develop methods for the systematic analysis and interpretations of the data to draw valid information in linkage of natural and societal environmental changes.

• The Journal of Society for e-Business Studies
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• v.8 no.1
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• pp.121-139
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• 2003

Currently, it is not popular to use the STEP based product information in the construction drawing files, in spite of the importance and possibility of using various product data in drawing files on the CALS/EC environment. This paper aims to demonstrate a construction drawing information management system based on ISO 10303/STEP. To achieve this aim, the authors have analyzed the current construction drawing information classification hierarchy widely used for domestic and international, and examined the material data connection mechanism within CAD drawing data, and finally investigated the management systems for construction documentations and drawings in a public companies. Therefore, the expected benefit of the proposed system is that STEP drawing information management will be done standardization and the information of STEP construction drawing can be managed, shared and supported design business through materials data connection.

• Journal of the Korean Society of Marine Environment & Safety
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• v.18 no.3
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• pp.261-266
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• 2012

This study provides for the enabling role of RFID technology in effecting supply chain management and logistics development. Furthermore, the findings of study reveal the recent application of RFID in international logistics and analyze the reason as the key factor of RFID widespread adoption and usage among suppliers.

• Journal of Korea Multimedia Society
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• v.18 no.10
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• pp.1231-1240
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• 2015

Nowadays, in islands where electricity should be provided autonomously, stand-alone microgrid technologies using renewable energy such as sunlight generation and wind power generation come into wide use. The microgrid electricity generation using renewable energy is greatly affected by the natural environment of a site. In order to maintain stable electricity supply for fluctuating electricity generation due to natural environment, the energy management via EMS is positively necessary. In existing stand-alone microgrid EMS, system operation logic is not changeable flexibly because compiled or builded codes are released into the EMS of a site, respectively. In this paper, we designed a flexible operating script-based microgrid EMS Framework for various sites and applied it to some island sites. We could confirm its usability.

• Journal of the Korean Operations Research and Management Science Society
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• v.14 no.2
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• pp.67-74
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• 1989

This paper considers single-product production and inventory management problem where cumulative demands up to each time period are mutually independent random variables(known) having continuous probability distributions and the associated cost-minimizing production schedule (when to produce and how much to produce) need be determined in rolling horizon environment. For the problem, both the production cost and the inventory holding and backlogging costs are included in the whole system cost. The probability distributions of these costs are expressed in terms of random demands, and utilized to exploit a solution procedure for a production schedule which minimizes the expected unit time system cost and also reduces the probability of rist that, for the first-period of each production cycle (rolling horizon), the cost of the "production" option will exceed that of the "non-production" one. Numerical examples are presented for the solution procedure illustration.cedure illustration.

• Journal of the Korea Safety Management & Science
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• v.14 no.2
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• pp.253-263
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• 2012

Although the national technical qualification scheme has a historical background for thirty-five years, it hasn't any study of an obvious cause analysis, effective counterplan and analysis relation to its historical changes. This paper analyses the internal and external factors of technical qualification policy of the Human resources development service of Korea using PEST and SWOT and surveys the influence on its environment and the variation cause of the ratio of successful applicants to the qualification scheme. This paper also suggests systematically the direction for development of the technical qualification scheme using FMEA. Thus, this study assists to construct rapidly a correspondence system to the environment change simultaneously to determine decision making to the marketing policy.

• Journal of Intelligence and Information Systems
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• v.13 no.4
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• pp.45-63
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• 2007

Recently as ubiquitous environment comes to the fore, information density is raised and enterprise is being able to capture and utilize customer-related information at the same time when the customer purchases a product. In this environment, a need for the recommender systems which can deliver proper information to the customer at the right time and right situation is highly increased. Therefore, the research on recommender systems continued actively in a variety of fields. Until now, most of recommender systems deal with item recommendation. However, in the market in ubiquitous environment where the same item can be purchased at several stores, it is highly desirable to recommend store to the customer based on his/her contextual situation and preference such as store location, store atmosphere, product quality and price, etc. In this line of research, we proposed the store recommender system using customer's contextual situation and preference in the market in ubiquitous environment. This system is based on collaborative filtering and Apriori algorithms. It will be able to provide customer-centric service to the customer, enhance shopping experiences and contribute in revitalizing market in the long term.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.34 no.3
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• pp.189-192
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• 2024

Objectives: To protect researchers using chemicals, it is necessary to monitor whether the working environment is well managed through the performance evaluation of the local exhaust system in the research laboratory. These results need to be reflected in the work environment management policy of research laboratories in the future. Methods: By measuring the capture velocities of fume hoods and arm hoods, which are the most commonly used local exhaust systems in research laboratories in a domestic research institute, we tried to confirm the degree to which the actual capture velocity values and legal standards were satisfied. The capture velocities were measured using a hot wire wind speedometer (TSI 9565-P, USA, 2016 with all exhaust systems in operation in the laboratory. As for the measurement position for each local exhaust system, in the case of the fume hood, the wind speed in the center of the opening surface was measured after opening 50% of the door of the hood. For the arm hood the capture velocities were measured at a distance of 10 cm vertically from the opening surface of the hood Conclusions: The total number of arm hoods measured was 546, and the average capture velocity was 0.61 m/sec with an S.D of 0.49. Among them, 99 satisfied the capture velocity standard of 1m/sec, meaning only 18.1% of the total satisfied with the standard. The total number of fume hoods measured was 625, and the average control wind speed was 0.48 m/sec with an S.D. of 0.17. Among them, the number of fume hoods that satisfied the capture velocity standard of 0.4 m/sec was 518, meaning 82.9% of the total satisfied the standard. Therefore, research institutes that operate local exhaust systems to protect researchers from chemicals should further strengthen the capture velocity management of hoods, and government agencies need to reflect this in work environment management policies based on further evaluation results.

• Journal of Korea Society of Industrial Information Systems
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• v.14 no.5
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• pp.257-270
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• 2009

In the ways of coping with the rapidly changing environment, the information technology is recognized a critical factor in order to rethink the effectiveness of business management, and enterprise resource planning(ERP) system has emerged as an essential method for strengthening the competitiveness on the strategic level. This empirical study has revealed the following. First, well-organized system management and the strong will and leadership of top management have significantly positive influence on the reduction of cost and time. Second, system management, users' participation, and the strong will and leadership of top management have significantly positive influence on the improvement of management and informational environment. It also proposes the guidelines of how to establish an ERP system successfully in the public enterprises.

• Journal of Korean Society on Water Environment
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• v.33 no.1
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• pp.15-33
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• 2017

Based on the existing pollutant emissin standards which are armed at the pollutant concentration of each pollution source, government formulated and implemented new management system of total water pollutant emission. By virtue of this new management system, pollution loading amount of individual watershed could be controlled, which achieved the requirement of water quality management such as TP and BOD. In initiate stage of it's implement, BOD was selected as object of water quality management, While it's necessary to consider the continuity of water quality data and established pollutant management laws and policy. During the ongoing management, TP management was added into the system while simply BOD management was not enough. However, the frequency of algae bloom in Han-river showed a trend of same, even though TP was treated as additional control target. Therefore, this paper will analyze different water quality parameters and characteristic of water quality, so that this study can be provide as reference for watershed management of water quality, by which the applicable management period and target pollutant can be selected in the future.