• 자원ㆍ환경경제연구
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• 제11권3호
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• pp.345-375
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• 2002

The purpose of this paper is to measure the change of the production efficiency which may happen when environmental regulation incurs technological constraint in the process of production, and to compute the opportunity cost of pollution reduction with the lost products based on the change of efficiency. The patterns of production technoloy in the paper are divided into the technologies of strong disposability and weak disposabilty to grasp the effect of the technological constraint due to the environmental regulation. The endowment of the technolgical constraints in the process of production is considered to bring the greatest restriction on firm's production. When the environmental efficiencies of Korean regional manufactures were measured with linear programming model, the lost products related with the constraint of production technology that environmental regulation incurred, was average 148.1 billion dollar per year(5.87% of one year overall products) for total manufactures in 1991~1998. The ratio of the lost products for total products was spread from 0.78% to 1l.08%. The average lost products of 15 regions were changed from 4.66% to 18.35% of total products. Generally the environmental efficiency index of regional manufactures being decreased continuously since 1991, it is estimated that the environmental performance of Korean manufactures has been more and more deteriorating.

• 한국안전학회지
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• 제27권3호
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• pp.77-82
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• 2012

The leakage of toxic chemicals impact seriously on human being and environment, therefore during their treatment process, a proper management system is necessary to control their toxic effect. This study was designed to suggest the management regulation that supports business managers and facilities management. There are no extra regulation to control emergency accidents and terrors in chemical facilities. Developed countries like USA operate the management standards to control the toxic chemical and facilities according to their toxicity and processes. In order to solve this problem, we have analysed the advanced nations standard methods of security in chemical plants to study the new security management regulation which helps to prevent the chemical accidents. Especially, in USA, CCPS (Center for Chemical Process Safety), SVA (Security Vulnerability Assessment) and RBPSs (Risk-Based Performance Standards) of DHS (Department of Homeland Security) were invest I gated. On the basis of the results, we have suggested the application methods of the security and safety regulation in Korea.

• KEPCO Journal on Electric Power and Energy
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• 제2권2호
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• pp.227-232
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• 2016

To test the effectiveness of using an energy storage system for frequency regulation, the Energy New Business Laboratory at KEPCO Research Institute installed a 4 MW energy storage system (ESS) demonstration facility at the Jocheon Substation on Jeju Island. And after the successful completion of demonstration operations, a total of 52 MW ESS for frequency regulation was installed in Seo-Anseong (28 MW, governor-free control) and in Shin-Yongin (24 MW, automatic generation control). The control system used in these two sites was based on the control system developed for the 4 MW ESS demonstration facility. KEPCO recently finished the construction of 184 MW ESS for frequency regulation in 8 locations, (e.g. Shin-Gimjae substation, Shin-Gaeryong substation, etc.) and they are currently being tested for automatic operation. KEPCO plans to construct additional ESS facilities (up to a total of about 500 MW for frequency regulation by 2017), thus, various operational tests would first have to be conducted. The high-speed characteristic of ESS can negatively impact the power system in case the 500 MW ESS is not properly operated. At this stage we need to verify how effectively the 500 MW ESS can regulate frequency. In this paper, the effect of using ESS for frequency regulation on the power system of Korea was studied. Simulations were conducted to determine the effect of using a 524 MW ESS for frequency regulation. Models of the power grid and the ESS were developed to verify the performance of the operation system and its control system. When a high capacity power plant is tripped, a 24 MW ESS supplies power automatically and 4 units of 125MW ESS supply power manually. This study only focuses on transient state analysis. It was verified that 500 MW ESS can regulate system frequency faster and more effectively than conventional power plants. Also, it was verified that time-delayed high speed operations of multiple ESS facilities do not negatively impact power system operations. It is recommended that further testing be conducted for a fleet of multiple ESSs with different capacities distributed over multiple substations (e.g. 16, 24, 28, and 48 MW ESS distributed across 20 substations) because each ESS measures frequency individually. The operation of one ESS facility will differ from the other ESSs within the fleet, and may negatively impact the performance of the others. The following are also recommended: (a) studies wherein all ESSs should be operated in automatic mode; (b) studies on the improvement of individual ESS control; and (c) studies on the reapportionment of all ESS energies within the fleet.

• 대한치위생과학회지
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• 제4권2호
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• pp.89-98
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• 2021

Background: To analyze the effect of self-regulation on the fear of dental treatment in order to use it as basic data for efficient oral health care among male adolescents. Methods: A survey was administered to 241 first graders of specialized high schools in Daegu using a self-entry method. Twenty questions about fear of dental treatment and fifteen questions about self-regulation were included. The higher the score, the higher the fear of dental treatment and the self-regulation ability, showing a high reliability of 0.972 and 0.750, respectively. Results: The mean score of the participants' self-regulation ability was 3.25±0.51 and that of the degree of fear for dental treatment was relatively low at 1.72±0.85. It was confirmed that the higher the academic performance (F=7.635, p<0.01), the better was the self-regulation based on self-diagnosis (F=3.142, p<0.05), and was associated with higher health awareness (F=5.894, p<0.01). The degree of fear for dental treatment was significantly higher in the self-diagnosis-induced poor health group (F=4.933, p<0.01) and associated with a lower awareness of health (F=3.093, p<0.05). The participants' self-regulation ability was significantly negatively correlated with the degree of fear regarding dental treatment (r=-0.269, p<0.01). Regression analysis was performed using the degree of fear as a dependent variable and including sub-area variables of self-diagnosis-based health status, perception of health, and self-regulation ability as independent variables (β=-0.163, p<0.05). Among the self-regulation abilities, controlled composition (β=-0.232, p<0.01) had a significant effect; the higher the composition, the lower the degree of fear. The total explanatory power of this variable was 8.5%. Conclusion: An appropriate customized education program that can encourage individuals to practice self-care and maintain oral hygiene along with a clear understanding of underlying individual oral health conditions during adolescence is essential for promoting oral health.

• 한국심리학회지 : 코칭
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• 제7권1호
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• pp.1-31
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• 2023

본 연구의 목적은 직장인의 정서인식이 부정적 피드백 수용의 관계에서 적응적 인지적 정서조절의 매개효과와 부하가 지각한 상사 정서조절의 조절효과를 검증하는 것이다. 이를 위해 국내의 다양한 기업에 종사하고 있는 비관리자 직장인 대상으로 설문조사를 실시하였고, 총 273명의 응답을 분석하였다. 측정도구의 신뢰도와 타당도를 검증하기 위해 AMOS 22로 확인적 요인분석을 실시하였고, 가설검증을 위해 SPSS Process Macro를 활용하여 매개효과와 조절효과를 살펴보았다. 본 연구의 결과를 요약하면 다음과 같다. 첫째, 정서인식은 적응적 인지적 정서 조절을 매개로 하여 부정적 피드백 수용에 간접적으로 영향을 미친다. 둘째, 상사의 정서조절은 정서인식과 부정적 피드백 수용의 관계를 조절한다. 구체적으로 상사의 정서조절이 낮을 때 정서인식과 부정적 피드백 수용 관계가 더 강해지는 것을 확인하였다. 연구결과를 바탕으로 직장인이 자신과 타인의 정서에 대한 인식 수준과 적응적 인지적 정서조절, 그리고 부정적 피드백을 받아들이는 심리적 과정을 확인하고, 부정적 피드백을 긍정적으로 수용하는 데 있어 상사의 정서조절이 갖는 중요성을 확인하였다. 마지막으로 연구 결과를 토대로 본 연구의 학문적 의의 및 코칭에서의 시사점, 그리고 제한점과 미래 연구 과제에 대해 논의하였다.

• Structural Engineering and Mechanics
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• 제39권1호
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• pp.147-168
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• 2011

To ensure safety and long term performance, structural control has rapidly matured over the past decade into a viable means of limiting structural responses to strong winds and earthquakes. Nonlinear response history analysis requires rigorous procedure to compute seismic demands. Therefore the simplified nonlinear analysis procedures are useful to determine performance of the structure. In this investigation, application of improved capacity demand diagram method in the control of structural system is presented for the first time. Developed pole assignment method (DPAM) in structural systems control is introduced. Genetic algorithm (GA) is employed as an optimization tool for minimizing a target function that defines values of coefficient matrices providing the placement of actuators and optimal control forces. The ground acceleration is modified under induced control forces. Due to this, performance of structure based on improved nonlinear demand diagram is selected to threshold of nonlinear behavior of structure. With small energy consumption characteristics, semi-active devices are especially attractive solutions for limiting earthquake effects. To illustrate the efficiency of DPAM, a 30-story steel moment frame structure employing the semi-active control devices is applied. In comparison to the widely used linear quadratic regulation (LQR), the DPAM controller was shown to be just as effective and better in the reduction of structural responses during large earthquakes.

• 한국지열·수열에너지학회논문집
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• 제18권4호
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• pp.22-32
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• 2022

To reduce energy consumption and CO₂ emission in building sector, a ground source heat pump system has been highly adopted due to its high efficient by many regulation. A certification system has been operated to distribute reliable and high-efficient heat pump units. In this study, the performance status of the recently certified ground source heat pump unit with components was investigated. All heat pump units certified from 2015 to 2020 were water to water heat pump types. Compared to the past, higher capacity systems over 400 kW have been certificed. The cooling COP of the heat pump unit based on certification criteria showed higher value than the heating COP. It is highly recommended to revise the certified criteria values considering operating conditions individually. Most of ground source heat pump units have employed scroll type compressors and plate type heat exchangers with HFC refrigerant.

• 한국보육지원학회지
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• 제11권1호
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• pp.153-171
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• 2015

본 연구는 유아의 내적표상 유형에 따라 가정에서의 코티솔 분비 패턴이 어떠한지를 탐색해보고자 하였다. 이를 위해 40명의 유아를 대상으로 이야기 완성과제(MacArthur Story Stem Battery, Breth erton et al. 1990)를 실시하였고, 가정에서 유아의 타액을 채취하여 수집하였다. 수집된 자료는 기술통계, 군집분석을 통해 분석하였다. 분석결과 유아의 내적표상 유형은 불안유형, 제한유형, 비조절된 공격유형, 회피유형, 친사회유형의 5개 유형으로 나타났으며, 유아의 가정에서의 코티솔 분비 패턴은 오전에 코티솔 분비가 많고 오후로 갈수록 떨어지는 패턴으로 나타났다. 또한 내적표상 유형에 따라 분비패턴이 다르게 나타났다. 이러한 결과를 통해 볼 때 유아의 내적 표상이 일상적 스트레스 상황과 부모와의 상호작용시에 유아의 반응과 스트레스 호르몬의 활성화 정도에 영향을 미칠 가능성이 있음을 조심스레 예측할 수 있다.

• 디지털융복합연구
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• 제17권10호
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• pp.199-207
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• 2019

본 연구는 기업 구성원의 집단적 문화성향이 변화적 조직시민행동에 미치는 영향 및 감성활용의 매개효과를 확인하는데 목적을 두고 분석하였다. 홉스테드의 문화차원인 집단적 문화성향은 아시아국가에서 높게 나타났으며 관련 선행연구는 학교 및 국가별 차원에서 대부분 분석되었다. 본 연구는 홉스테드 문화차원을 개인적 차원으로 설문화한 Yoo's Cultural Value Scale (CVSCALE) 사용하여 국내 S 전자회사의 임직원 200명을 상대로 자기기입식 설문지를 2주 동안 수집, SPSS 21.0을 통해 통계 분석했으며 결과는 다음과 같다. 구성원의 집단적 문화성향은 변화적 조직시민 행동에 유의한 (+) 영향을 미친다고 나타났으며 개인의 감성활용이 집단적 문화성향과 변화적 조직시민행동을 완전 매개한다는 결과가 나타났다. 본 연구 결과를 통해 구성원의 집단적 문화성향이 조직의 성과에 긍정적 영향을 준다는 점을 검증하였다. 본 연구결과를 통해 집단적 문화성향과 감성활용 능력이 조직시민행동의 선행요인의 가능성이란 새로운 시사점을 제공하였다. 또한 구성원들의 감성 활용 훈련 및 교육을 제도적으로 정착하여 개인 및 그룹차원의 성과를 향상하도록 제시하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.232-233
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• 2013

Recently Korea has imported and executed Performance Based Design for the method to settle the dangerousness on outbreak of fire of high-rise building. The overseas country's PBD is autonomic but It is unable to carry out the essential role of PBD as the performance based design that based the code based design in the domestic. Also It occurs the problems that different the classification standard of building as dualisation between the building code and the fire services act. In this study, We have investigated overseas's cases for the PBD of high-rise building and have drawn the improvement direction & the problem of domestic's PBD by comparing and the analysing the domestic regulation.