• Journal of Korean Society on Water Environment
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• v.26 no.4
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• pp.557-565
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• 2010

Recently, regulations on toxic compounds in aquatic environment have been strengthened in korea due to the increasing public awareness of the water quality. Typically, these regulations include introduction of emerging toxic compounds and stricter effluent limitations for the already regulated compounds. However, too strict regulations may cause excessive burden on the industry. Therefore it is also important to assess the economic impacts when the new effluent limitation guidelines are introduced. The estimation of the additional cost for the wastewater dischargers to meet the new guidelines are based on the selected treatment technology to handle the hazardous substances and the regulatory levels for effluent limitations. To explore the procedures for cost estimation in enforcing new effluent limitations, a case study was performed specially for 1,4-dichlorobenzene. The pollutants of concern are surveyed for different industrial categories and various treatment technologies. For a given pollutant, the general performances of the treatment technologies are surveyed and a representative technology is selected. For a given technology, the capital cost and annual Operation and Maintenance (O&M) cost was calculated. The calculation of baseline costs to operate ordinary treatment technologies is also important. The ratio between the cost for introducing new treatment process and the baseline cost required for conventional technology was used to evaluate the economic impact on the industry. For 1,4-dichlorobenzene, steam stripping and activated carbon processes were selected as the specific treatment technologies. The cost effects to the regulation of the compound were found to be 6.4% and 14.5% increase in capital cost and O&M cost, respectively, at the flow rate over $2,000m^3/d$ for the categories of synthetic resin and other plastics manufacturing industry. For the case of petrochemical basic compounds manufacturing industry, the cost increases were 5.8% and 12.4%, respectively. It was suggested that cost effect analysis to evaluate the economic impacts of new effluent limitations on the industry is crucial to establish more balanced and reasonable effluent limitations to manage the industrial wastewater containing emerging toxic compounds in the wastewater.

• Korean Journal of Social Welfare Studies
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• v.42 no.2
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• pp.323-350
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• 2011

Work ability is a fundamental factor to determine who are the recipients of disability benefits or employment services. Disability Grade based on medical impairments is used as a work ability assessment in Korea, but it has been heavily criticized that it does not assess disabled person's work ability adequately. This study tried to find out an index which explains employment status of disabled persons the best among four work ability assessment indexes of disability grade, level of ICF activity limitations and participation restriction, level of help needed with daily activities, and self-assessed health status. As a result, the level of ICF activity limitations and participation restriction explained the employment status the best, and help needed for daily activities is the second, disability grade is the third, and self-assessed health status is the last. In conclusion, level of ICF activity limitations and participation restriction is the best work ability assessment in Disabled People Pension and Employment Policy for Disabled People. Therefore, it is the basic premise to develop a new work ability assessment index which consists of items in ICF activity limitations and participation restriction.

• The Journal of Society for e-Business Studies
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• v.4 no.3
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• pp.235-246
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• 1999

There have been several approaches to integrating heterogeneous database systems in enterprises. Due to their inherent limitations, however, it has been difficult to apply them to actual situations in enterprises. In this paper, we propose EasyConnection, a system that is based on the flexible and extensible architecture and overcomes the limitations of the previous approaches, EasyConnection consists of Wrappers, Sharing Manager, and Clients, and the connections among these components are based on CORBA. It can also be used as the information management mechanism for such application systems as ERP, PDM, and EAI.

• Korean Management Science Review
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• v.13 no.2
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• pp.193-203
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• 1996

There is no generally accepted definition of information technology (IT) although this is an important issue in the management information systems (MIS) area. In an effort to address this issue, the evolution of IT is reviewed from a historical perspective. A historical review on IT suggests that its evolution be broken down into three stages in a systematic way. Further, the identification of mainstream research interests at each stage makes a contribution in part to defining IT. Two approaches to defining IT are identified, and limitations of each approach are discussed. Finally, a better way to address these limitations is suggested.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06d
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• pp.366-368
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• 2012

Network Coding approach to IP tracback was proposed by Sattari et al. [5] in order to reduce number of packets required to trace the source of a single attack scenario. In this paper, we analysis and point out limitations and problems of their proof for benefit of network coding to IP traceback.

• Journal of the Korean housing association
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• v.1 no.2
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• pp.67-80
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• 1990

This study aims to analyze the reserch result about housing history of multi-disciplines especially archeology, cultural anthropology, folklore, geography, archtecture and dwelling science. Each discipline has acted an important role to develop the research on housing history, even though they have some limitations. They usually failed in clarfying the relationship among physical housing, habitants and social environment. In order to overcome these limitations, this study suggests microsociological approach, so called "Housing Adjustment Model".del".uot;.

• 한국전기화학회:학술대회논문집
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• 2003.11a
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• pp.153-168
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• 2003

Polymer electrolytes - solid polymeric membranes with dissolved salts - are being intensively studied for use in all-solid-state lithium-metal-polymer consumer electronic device. The low ionic conductivity at room temperature of existing polymer electrolytes, however, has seriously hindered the development of such batteries for many applications. The incorporation of salts molten at room temperature (room temperature ionic liquids or RTILs) into polymer electrolytes may be the necessary solution to overcoming the inherent ionic conductivity limitations of 'dry' polymer electrolytes.

• 제어로봇시스템학회:학술대회논문집
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• 1992.10a
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• pp.159-164
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• 1992

In this paper, the complex nonlinear dynamics of a satellite is obtained. And it is shown that several limitations exist when the magnetorquer is used as an active actuator to attitude control. Such limitations cause a delayed convergence of pitch and roll angle. The simulation results insure that the roll angle bias is dependent on the z axis spin rate. And a heuristic algorithm is applied to control the attitude libration through the computer simulations.

• Proceedings of the IEEK Conference
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• 1999.06a
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• pp.1125-1128
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• 1999

This paper presents a speed controller for the Sinusoidal type BLDC motor using the sliding mode. Since the sliding mode control has some practical limitations such as the chattering phenomenon and reaching phase problems, the technique of overcoming these limitations is proposed in a practical realization. This proposed speed control technique is composed of an smooth integral variable structure control(IVSC), and chattering prediction method.

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.115-116
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• 2013

There are other limitations on B2C e-commerce that have the potential to cap its growth rate and ultimate size. Table 1.4 describes some of these limiting factors. Some limitations may be minimized in the next decade. For instance, the price of an entry-level computer such as a netbook has fallen to $200-$300, although this still represents a substantial amount of money to many.