• 전기의세계
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• v.44 no.2
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• pp.21-27
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• 1995

인류과학 문명의 발달은 전기문명의 발전없이는 생각할 수 없음은 자명한 사실이다. 그러나 화석 에너지의 고갈로 인한 전기 에너지의 생산의 타개책으로 인간의 지혜는 원자력발전이란 귀한 에너지원을 확보하게 되었음은 실로 다행한 일이며 인간역사가 계속 이어질 수 있는 바탕을 마련하였다고 볼 수 있다. 또한, 이 원자력 에너지는 화석 에너지의 결점인 환경오염으로부터 완전해방이 되었을 뿐만 아니라 경제성 측면에서 비교우위에 있음이 확실하다. 그러나 원전은 안전성을 담보로 하기 때문에 설비의 운영관리에 많은 제약이 뒤따르고 있다. 그러므로 원전은 그 관리능력이 인정될 수 있는 국가와 국민만이 화석 에너지가 갖지 못하는 혜택을 누릴 수 있는 것이다. 그래서 원전의 안전 규제 체제는 사업자에게만 그 책임을 지울 수 없으므로 국가적인 차원에서 안전관리의 목표와 정책을 수립하고 이것을 효과적으로 시행하기 위한 법적, 제도적 장치를 마련하고 있다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.39-39
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• 2003

우리나라는 얼마 전까지만 해도 어업허가제도에 의하여 어업자원을 관리하여 왔다. 그러나 어업기술의 발달로 상대적으로 과거에 비해 어획노력의 증대와 더불어 대부분의 수산자원이 남획상태에 이르게 되었다. 허가제도하에서는 과잉노력량에 대한 조정이 곤란하고 현실적으로 불법ㆍ남획어업이 자행되어 어업자원 고갈현상이 가속화되고 해양오염 증가와 매립ㆍ간척으로 인한 어장축소 등으로 어업생산성 저하됨으로서 새로운 어업관리제도의 필요성 대두되어 간접적 자원관리방식의 전통적 방법에서 어획량을 직접 관리하는 TAC제도로의 전환 필요성 증대되었다. (중략)

• Korean Journal of Microbiology
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• v.54 no.4
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• pp.309-319
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• 2018

Previously, six Schizosaccharomyce pombe mutants that induce pheromone even in the presence of nitrogen source were isolated from a bank of temperature sensitive mutants. In this report, one of these mutants, pws6 was further characterized. The pheromone induction in pws6 mutant cells was specific to nutrient: the M-factor pheromone was induced without nitrogen starvation but not without glucose starvation. This result suggests that the pws6 mutant might have a specific defect in the pathway for nitrogen starvation. The pws6 mutant induces P-factor pheromone as well as M-factor without starvation of nitrogen in temperature sensitive mode, suggesting that the pheromone induction phenotype of pws6 mutation is not cell-type specific. From cloning of the $pws6^+$ gene by complementation of the temperature sensitive growth defect, three plasmids containing 8.1 kb, 3.3 kb, and 4.8 kb yeast DNA were recovered. These plasmids complement the growth defect of the pws6 mutant by 100%, 70%, and 10~20%, respectively. The abilities of these plasmids to complement pheromone induction phenotype of pws6 mutant cells were correlated well with the efficiencies of complementation of the growth defect. With comparison of their open reading frames to the complementation efficiencies, it is concluded that the open reading frame, SPBC19C7.06 is responsible for the complementation of temperature sensitive phenotype of the pws6 mutant. This open reading frame, named prs1, contains one long exon with no intron and encodes a putative prolyl tRNA synthetase. The putative Prs1 protein exhibits significant similarities to the prolyl tRNA synthetases of other species.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.40 no.6
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• pp.583-592
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• 2020

This study assessed source depletion in the vadose zones of contaminated sites. The possible range of infiltration rate in Korea was statistically analyzed. The results showed a trend of decreasing leachate concentration of 13 pollutants used for risk assessment. Among them, benzene, ethylbenzene, toluene, and xylene showed a lower leachate concentration in groundwater over time due to their low distribution coefficient and also possible biodegradation effects. The average values of the relative concentration could be taken as a default index due to a very small range of uncertainties. In the case of heavy metals, it was shown that the leachate concentration in a pollutant does not decrease over time. Considering the annually different infiltration, a site-specific source-depletion scenario was applied to Cheongju in North Chungcheong Province. The result was expressed as a time series of the relative concentration of the leachate concentration, and this was compared to the trend by averaged Korean infiltration. Finally, an open-source code that used Python was used to help calculate the leachate concentration by this site-specific infiltration scenario.

• Journal of Industrial Convergence
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• v.20 no.8
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• pp.163-172
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• 2022

Public officials are volunteers for the people, and the police are in charge of the safety of the people. In particular, the marine safety of Korea, which has three sides of the sea, is very important. The education of maritime police is a very important factor due to the specificity and risk of the sea. In particular, since the new curriculum is linked to the job while in office, factors related to educational performance are more important. In this study, the relationship between personality characteristics and academic burnout was examined for 200 new maritime police officials. Among the five factors of personality characteristics, extroversion factors, neurotic factors, and emotional exhaustion factors were extroversion factors, neurotic factors, and cynicism factors, and extroversion factors, neurotic factors, and integrity factors. In particular, the five factors of personality characteristics that have the greatest influence on academic burnout were neurotic. For the educational satisfaction and effectiveness of the new maritime police officer, it is necessary to minimize the psychological margin and stress of the new maritime police officer.

• Korean Journal of Social Welfare Studies
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• v.42 no.4
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• pp.187-216
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• 2011

This study examined the effects of elderly care facility social workers' work environment (role conflict, role ambiguity, role overload, and adequacy of the reward system) and personal tendency (emotional empathy, cognitive empathy, external attribution, and internal attribution) on their burnout (emotional burnout, low personal achievement, and depersonalization about clients) and suggested strategies for preventing burnout in social workers at elderly care facilities. For this purpose, we conducted a questionnaire survey of social workers working at institutions designated as elderly long-term care facilities and collected a total of 312 questionnaires. According to the results of analyzing the data using a structural equation model, among the sub-factors of work environment, role ambiguity had a significant positive effect on low personal achievement and depersonalization about clients, role conflict on emotional burnout, and role overload on depersonalization about clients. Among the sub-factors of personal tendency, cognitive empathy and internal attribution had a significant negative effect on low personal achievement, and external attribution had a significant positive effect on emotional burnout and depersonalization about clients. This study is meaningful in that it illuminated social workers' burnout not only from the aspect of work environment but also from that of personal tendency.

• Environmental and Resource Economics Review
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• v.13 no.1
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• pp.33-47
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• 2004

Even though the price of extracted but unprocessed coal has been available in Korea, the use of it as scarcity index would be inappropriate because of price subsidy. Following Halvorsen and Smith(1984), Kim and Lee(2002) derived estimates of the shadow price of unextracted coal by estimating the restricted cost function and differentiating with respect to the quantity of coal extracted. In Korea, however, due to the limited data the capital prices have been computed inconsistently case by case without relying on the robust formula like the Christensen-Jorgenson methodology used in US, which could result in biased estimators of the restricted cost function. In the paper the shadow prices of the resources in situ are obtained by measuring an input distance function defined by Shephard (1970), which requires only the data on the quantities of inputs and output. Empirical results for the Korean coal mining industry show that these shadow prices as a coal scarcity have increased fast by approximately three times in comparisons with those obtained by Kim and Lee.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2005.04a
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• pp.72-75
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• 2005

본 연구에서는 야외규모 TCE (trichloroethylene) 질량전이역학을 평가하기 위해 TCE의 대수층 내 유입 및 용해상 거동을 고해상도 수치 모사를 실시하였다. 공간적으로 불균질한 대수층 $10{\times}10{\times}10m$ 도메인 내부의 유입된 TCE 분포를 모사하기 위해 본 연구를 통해 개발된 정성적 침투모델(percolation model)이 이용되었다. 이를 기초로 하여 연계되어진 (coupled) 지하수 유동 및 용해상 거동 장기 (long-term) 모사를 실시하였다. 지엽적으로 일어나는 질량전이는 기존 연구를 통하여 발표되어진 실험실규모 연구에 기초하였다. 지하수가 도메인을 지나 흘러나가는 경계면에서 측정되어진 용해상 (aqueous phase) TCE의 질량선속 (mass flux)을 통해 실질 야외규모 질량전이 상수가 계산되었다. 관찰된 바 야외규모 질량전이 상수는 실험실 연구를 통해 측정된 값에 비하여 휠씬 작은 값을 보였으며 이는 지하수 유속 및 TCE의 불균질한 분포에 기인한다. 야외규모 질량전이 상수는 평균 지하수 유속에 직접 비례하는 것으로 관찰되었고 이는 기존 실험실 연구를 통해 알려진 평균 지하수 유속의 0.7승이라는 결과와 대조되는 것이다. 또한 모사를 통해 관찰된 야외규모 질량전이 상수는 상대 TCE 질량의 고갈상수 승에 비례함을 보였다. 이러한 고갈상수는 TCE가 측방으로 퍼지는 현상이 강한 대수층, 즉 저투수성 층의 발달이 양호한 대수층, 에서는 1보다 작은 값을 갖고 그렇지 않은 대수층, 즉 저투수성 층의 발달이 미약한 대수층, 에서는 대체적으로 1보다 높은 값을 갖는 것으로 관측되었다. 이는 DNAPL의 측방 퍼짐이 강한 대수층에서는 용해로 인한 시간에 따른 오염원 부근에서의 농도 감소가 미약하기 때문인 것이며, 그와 반대로 DNAPL의 측방 퍼짐이 약한 대수층에서는 시간이 지남에 따라 용해에 의해 지속적으로 오염원 부근에서의 농도가 감소 또는 소멸함으로 인하여 측정되는 용해상 DNAPL의 질량 선속 역시 계속적으로 감소되는 것으로 밝혀졌다.

• Journal of the Korean GEO-environmental Society
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• v.25 no.5
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• pp.21-27
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• 2024

Limestone-based cement has been well utilized as a construction material throughout the world, but as civil and architectural development accelerates, limestone will gradually be depleted. The use of cement, the main material for civil engineering and construction, is rapidly increasing in modern times, and the depletion of high-quality limestone resources will be greater than expected in the future. Therefore, if existing resources can be used as construction materials to replace cement based on accumulated technology, the depleting limestone resources can be utilized for a longer period of time. In order to determine whether Hwang-toh, which forms about 10% of the surface layer of Korea's terrain, can be partially utilized as a construction material, this study aims to develop a Hwang-toh accelerator agent and prove whether it can be applied to the field through indoor tests.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.10a
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• pp.43-46
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• 2003

복합재료는 경량성, 내식성, 절연성 등이 우수한 기계적 특성을 가지고 있으므로 자원, 에너지 고갈 그리고 환경오염과 같은 문제를 해결하는데 기여할 수 있는 재료이다. 복합재료 중에서 열가소성 복합재료가 각광을 받고 있으므로 열가소성 복합재료의 파괴거동을 예측하기 위한 기초자료로서 열가소성복합재료의 충격시험을 통하여 복합재료의 파괴거동에 영향을 미치는 인자에 대한 연구가 필요하다. (중략)