• 자원ㆍ환경경제연구
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• 제19권2호
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• pp.283-301
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• 2010

이 논문은 벡터자기회귀모형을 사용하여 종이 공급에 펄프 가격이 미치는 영향의 정도와 지속기간을 추정하고, 종이 수요에 국내총생산이 미치는 영향의 정도와 지속기간을 추정하였다. 종이 공급을 분석한 결과에 의하면 펄프 가격의 변화가 종이 공급 변화의 약 12%를 설명하고, 종이 가격의 변화가 종이 공급 변화의 약 29%를 설명하였다. 즉, 펄프 가격이 종이 공급에 큰 영향을 미치지 않는다. 그리고 펄프 가격의 변화에 대한 종이 공급의 반응은 약 6개월간 지속되며, 종이 가격의 변화에 대한 종이 공급의 반응도 약 6개월간 지속되었다. 펄프 가격이 상승하는 경우에 펄프 가격의 상승분을 종이 가격에 반영하지 못하면 일시적으로 수익률이 감소할 수 있다. 즉, 종이 가격이 펄프 가격의 상승 속도를 따라가지 못하면 수익률이 하락한다. 이와 같은 경우에 수익률을 회복시키기 위해서는 제품단가를 인상하여야 한다. 종이가 과잉 공급되면 펄프 가격의 인상을 종이 가격에 반영할 수 없다. 그러나 우리나라의 종이 공급은 과잉 상태가 아니어서 펄프 가격의 상승을 종이 가격에 반영할 수 있다. 즉, 원료 가격이 상승하면 제품 가격도 인상되고 있다. 이 연구 결과에 의하면 펄프 가격의 변동이 종이 공급에 영향을 미치는 기간은 6개월이다. 즉, 펄프 가격의 인상이 종이 가격에 반영되어 종이 생산의 수익률 하락을 회복하기까지 6개월이 소요된다고 해석할 수 있다. 종이 수요를 분석한 결과에 의하면 국내총생산의 변화가 종이 수요 변화의 약 28%를 설명하고, 종이 가격의 변화가 종이 수요 변화의 약 17%를 설명하였다. 즉, 국내 총생산이 종이 수요에 상당한 영향을 미친다. 그리고 국내총생산의 변화에 대한 종이 수요의 반응은 약 6개월간 지속되며, 종이 가격의 변화에 대한 종이 수요의 반응도 약 6개월간 지속되었다.

• 한국환경보건학회지
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• 제35권5호
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• pp.426-432
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• 2009

Asbestos is a commercial term of natural occurring silicated minerals and forms long, thin fibers. Chrysotile, the serpentine asbestos, accounts for most use in commercial use. Asbestos is well known health hazard material and it is proved that inhalation of asbestos fibers leads to increased risk of developing several diseases such as lung cancer, mesothelioma, asbestosis. In these days, people most at risk for exposure are maintenance and construction workers and general citizens who are working on and close to the work area at which asbestos containing material is disturbing. Non asbestiform, though its chemical composition is same with regulated asbestos, is known to be less hazardous than asbestiform. Exposure guideline, 0.01 f/ml, is not safe level in terms of health risk. It is reasonable to take preventable action when asbestos is suspicious. In Korea, it is necessary to clarify the concept between hazard and risk, to differentiate asbestiform from non asbestiform, to make regulations for compensation for asbestos related patients, to manage future exposure for general citizens.

• International Journal of Railway
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• 제3권4호
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• pp.126-133
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• 2010

The thermal buckling analysis of curved continuous welded rail (CWR) is studied for the lateral buckling prevention. This study includes a thermal buckling theory which accounts for both thermal and vehicle loading effects in the evaluation of track stability. The parameters include rail size, track lateral resistance, track longitudinal and torsional stiffnesses, initial misalignment amplitude and wavelength, track curvature, tie-ballast friction coefficient and truck center spacing. Parametric studies are performed to evaluate the effects of the individual parameters on the upper and lower critical buckling temperatures. The results show that the upper critical buckling temperature is highly affected by the uplift due to vehicle loads. This study provides a guideline for the improvement of stability for dynamic buckling in curved CWR track.

• 자원환경지질
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• 제27권6호
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• pp.601-609
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• 1994

Uranium resources of Mongolia are generally confined to sediments deposited during Jurassic to Cretaceous volcanism. Territory of Mongolian uranium deposits is divided into four districts as follows; Mongol-Priargun, Gobi-Tamtsag, Hentii-Dauer, North-Mongolian. Potential uranium deposits were discovered by Airborne Gamma ray Spectrometric Survey(AGSM). One of them, Haraat deposit, which was interested to us, has been under detailed survey for exploitation by one of American companies, Concord company. The Erdes uranium mine is partly operated by about hundred Russian staffs at the open pit, while underground mining facilities such as the main hoist are almost closed. Ore minerals of the Erdes Mine are coffinite and pitchblende. Uranium content in ore ranges from 0.06% to 1%, averaging 0.2%. Ore reserves of uranium ore in the Dornod deposit including the Erdes Mine accounts 29,000 ton. It is reported that Uranium resources of Mongolia are 1,471,000 ton.

• 한국지반환경공학회 논문집
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• 제20권9호
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• pp.13-19
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• 2019

Dynamic earth pressure is considered an important parameter in the design of embedded structures. In current engineering design simplified methods developed either for yielding or non-yielding structures are utilized to predict resultant dynamic pressure. The applicability of these equations to embedded structures have not yet been reported. In this study we perform a suite of equivalent linear time history analysis for a range of embedded structure configurations. Numerically calculated dynamic pressure is shown to depend on the flexibility ratio (F), aspect ratio (L/H) of the embedded structure, and ground motion. Increase in L/H and intensity increases the magnitude of dynamic pressure. An increase in F decreases the dynamic pressure. Overall, the trends highlight the need for development of new method that accounts for F and L/H to calculate the dynamic pressure for the performance-based design of embedded structures.

• 한국미생물·생명공학회지
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• 제46권4호
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• pp.434-437
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• 2018

Pseudomonas aeruginosa accounts for a significant proportion of nosocomial infections. This study examined the antimicrobial susceptibility pattern and clonal relatedness of P. aeruginosa isolates of clinical and environmental origin. These isolates displayed susceptibility to levofloxacin, ciprofloxacin, gentamicin, imipenem, and ceftazidime of 65.0%, 62.5%, 90.0%, 100%, and 85%, respectively. PCR-RAPD analysis of the P. aeruginosa isolates revealed marked variation. No correlation was observed between the antibiotic resistance profiles and the DNA typing patterns.

• Asia Marketing Journal
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• 제24권4호
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• pp.143-151
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• 2023

In emerging countries, traditional retail, such as wet markets, still accounts for a large proportion of retail sales. Traditional retail has poor infrastructure compared to modern retail, and is often associated with problems of waste, water, and environmental pollution. Therefore, traditional retail faces extreme difficulties in achieving sustainability. This study aimed to determine what value traditional retail contributes to sustainability. We generated and applied a conceptual framework of sustainability to explore this question. We used a single case study of a small-scale wet market in Vietnam. The results showed that wet markets have significant value for the development of sustainable retail, including economic, environmental, social, and community value. This study extends the literature by providing a comprehensive and accurate view about the value of traditional retail in contributing to sustainability. It suggests strategies for traditional retail in emerging countries to survive sustainably.

• 산학경영연구
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• 제11권
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• pp.295-317
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• 1998

환경회계는 환경비용을 식별하고 측정하여 기업의 이해관계자들에게 제공하는 것이다. 따라서 본 연구의 목적은 첫째, 환경비용의 측정방법과 인식기준을 고찰하고 둘째, 환경비용의 공시방안을 제시하는 것이다. 본 연구는 국내외 관련문헌과 연구논문을 중심으로 한 문헌조사방법을 이용한 이론적 연구이다. 본 연구의 주요결과는 다음과 같다. 첫째, 환경비용은 발생원천과 기능 및 형태를 고려하면 환경오염 비용과 환경보전비용으로 크게 구분할 수 있다. 둘째, 환경비용의 측정방법은 다양하지만 거의 주관적이고 자의적인 것이어서 환경비용의 정확한 측정은 아직까지 어려운 실정이다. 셋째, 환경비용의 인식은 발생주의 원칙에 따라 전기오류수정손익으로, 당기비용 또는 손실로, 차기로 이연하여 자본화한다. 넷째, 환경비용의 공시는 재무제표확대모형, 절충적 모형, 독자적 보고모형 등이 있으나 단기적으로 전통회계의 틀 속에 계정을 추가하거나 보충명세서로 환경관련정보를 공시하는 재무제표의 확대모형이 적용하기 쉽다. 본 연구의 내용은 우리나라의 환경비용회계처리기준의 제정에 공헌할 것으로 기대된다.

• 한국주거학회논문집
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• 제24권5호
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• pp.69-76
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• 2013

The seriousness of greenhouse gas exhaustions and energy use of the building has increased, the world is making an effort with many requests and the consultation for sustainable development. For this reason, Green Building Certification Criteria has been implemented to reduce environmental load, high-performance and environmentally friendly in the United States, the United Kingdom and Germany. In response to the global trend like this, the Korean Government has induced the eco-friendly construction and sustainable development to implement the G-SEED (Green Building Certification Criteria of Korea) in 2002. However, in spite of the many authentication result, G-SEED has been pointed out that it needs for improve in the evaluation system of Apartment sector which accounts for more than 40% of the authentication. Therefore, the purpose of this study is to suggest improvements in the evaluation system. To achieve this, this study have selected for LEED, BREEAM, DGNB of comparison target, drawn improvements through comparing transition process in G-SEED.

• 한국대기환경학회지
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• 제24권1호
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• pp.63-71
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• 2008

Local meteorological conditions exert a strong influence over day-to-day variations in air pollutant concentrations. Therefore, the meteorological fluctuations have to be removed in order for air quality planners and managers to examine underlying emissions-related trends and make better air quality management decisions for future. In this study, the meteorologically adjusted $PM_{10}$ trends in Seoul are investigated over the period $1999{\sim}2006$ using Kolmogorov-Zurbenco (KZ) filter. The result indicated that meteorologicaJ variability accounts for about 25% of $PM_{10}$ variability. Both the meteorologically adjusted and unadjusted Jong-term daily $PM_{10}$ concentrations had a significant downward trends and the difference between the meteorologically adjusted and unadjusted was small. So it was assumed that in long-term daily $PM_{10}$ changes, localized changes in emissions is more important than the changes caused by meteorological conditions.