• 한국자원공학회지
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• 제55권6호
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• pp.624-634
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• 2018

인도네시아는 신규 유전 발견이 줄어들고 원유 순수입국으로 전환됨에 따라 석유 생산을 늘리고자 공동개발계약(Kerja Sama Operasi, KSO)을 통해 소규모 광구 개발을 위한 국내 투자 유치 활성화에 노력하고 있다. 하지만 KSO는 계약자 고위험 저수익의 계약형태이며, 계약자가 석유개발에 대한 모든 비용을 지불하기에 사업 타당성 판단을 위한 경제성 평가가 필수적이다. 이 연구에서는 KSO 계약 조건을 적용하여 인도네시아 소규모 광구 개발에 대한 경제성 평가를 수행하였으며, 민감도 분석을 통해 경제성 평가 시 주요 변수를 파악하였다. 그 결과 유가, CAPEX, OPEX가 경제성 평가에 영향을 미치는 것으로 나타났으며, 소규모 광구에서 상업적인 생산은 다소 어려운 것으로 판단되었다. 향후 이 연구는 국내 기업이 인도네시아 자원개발 투자 시 참고 자료로 활용할 수 있을 것이다.

• 웰빙융합연구
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• 제6권3호
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• pp.13-18
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• 2023

Purpose: The small-scale environmental impact assessment has been in operation since its implementation in August 2000, and is a system that meets the purpose of sustainable development in consideration of the environment in areas requiring conservation. However, when preparing a small environmental impact assessment report, the contents of the reduction measures are too qualitative, or reports are prepared to simply list the compliance stipulated by individual laws, and the contents of consultations prepared by consultative agencies and review agencies are not much different. In addition, the direction of consultation on development projects for similar locations of the same project type is frequently changed by reflecting the subjective judgment of the consultative officer of the Ministry of Environment (Environment Agency). Therefore, this study attempted to improve the establishment of measures to reduce the existing simple listing of qualitative contents and the inconsistent presentation of review opinions by consultative agencies and review agencies. Research design, data and methodology: The research method extracted absolute evaluation items and relative evaluation items among small environmental impact assessment items, analyzed and presented detailed items, and prepared a distribution table for each section according to the details of the relative evaluation items, and presented them as a table. Results: This study was conducted to derive uniform results with objective indicators in the preparation and consultation process of a small-scale environmental impact assessment. Conclusions: Once a quantitative evaluation is established, the consultant can objectively determine and process the environmental impact.

• 대한간호학회지
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• 제35권1호
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• pp.95-103
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• 2005

Purpose: The purpose of this study was to develop an instrument of task performance evaluation for clinical nurses, thus testing the validity and the reliability of the scale. Method: Data was collected from 84 Head Nurses and 255 General Nurses. A conceptual framework, composed of 4 factors of meaning in task performance evaluation, was identified through review of the relevant literature. A total of 78 items were developed and were used on a five-point likert scale. Through factor analysis, items whose factor loading was below 0.50 were deleted, thus 35 items remained. To test the validity and reliability of the instrument, the SPSS 11.0 windows program was used. Result: The results of the factor analysis indicated that 4 factors were classified and the cumulative percent of variance was 67.54%. The results of the reliability test indicated that Cronbach's coefficient of the total 35 items was over 0.9176. The results of the factor analysis indicated that factor loadings of all items was over 0.50. Conclusively, the validity and the reliability of the scale were proven. Conclusion: This study was identified as a tool with a high degree of reliability and validity.

• 한국연소학회지
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• 제15권2호
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• pp.1-11
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• 2010

Power generation systems based on the oxy-coal combustion with carbon dioxide capture and storage (CCS) capability are being proposed and discussed lately. Although a large number of lab scale studies for oxy-coal power plant have been made, studies of pilot scale or commercial scale power plant are not enough. Only a few demonstration projects for oxy-coal power plant are publicized recently. The proposed systems are evolving and various alternatives are to be comparatively evaluated. This paper presents a proposed approach for performance evaluation of a commercial 100 MWe class power plant, which is currently being considered for 'retrofitting' for the demonstration of the concept. The system is configurated based on design and operating conditions with proper assumptions. System components to be included in the discussion are listed. Evaluation criteria in terms of performance are summarized based on the system heat and mass balance and simple performance parameters, such as the fuel to power efficiency and brief introduction of the second law analysis. Also, gas composition is identified for additional analysis to impurities in the system including the purity of oxygen and unwanted gaseous components of nitrogen, argon and oxygen in air separation unit and $CO_2$ processing unit.

• 대한후두음성언어의학회지
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• 제19권2호
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• pp.89-95
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• 2008

주관적 음성평가는 음향분석기기를 이용한 객관적 음성 평가와 함께 음성분석에 유용하고 의미있는 평가방법이며 현재 알려진 검시법정 중에서 GRBAS 음성평가, VHI, patient self-perceptual voice rating이 가장 널리 사용되고 있고 인정받는 방법이다. 주관적 음성평가는 음성의 상태를 모두 대변할 수은 없으며 객관적인 음성평가에 대한 보완적인 의미를 가진다. 현재 개발되어 있는 주관적 음성평가 방법들이 유용한 평가도구이긴 하지만 나름대로의 문제점과 제한점을 가지고 있기 때문에 이에 대한 개선과 보완을 위한 지속적인 연구와 개발이 요구된다.

• 한국군사과학기술학회지
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• 제21권6호
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• pp.776-783
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• 2018

This paper proposes an improved test and evaluation methodology to be conducted for a in-flight threat-countermeasure encounter scenario. Although the conventional test method adopted in the precedent researches allows high precision and safety, such full-scale method is practically not appropriate to apply to small-scale test rounds for evaluating the subparts of the ammunition. To address this problem, this study suggests a readily-applicable, small-scale test and evaluation method of the subpart of the ammunition in firing test. In the threat-countermeasure encounter scenario, the results of several tests demonstrate that the proposed technique does not deteriorate the precision when the engagement point should be adjusted.

• 상하수도학회지
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• 제24권2호
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• pp.143-155
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• 2010

Fouling by inorganic scales needs to be prevented to effectively operate sea water reverse osmosis(SWRO) membrane systems. The extents of inorganic scaling with different array designs including one-pass, two-pass and several hybrid designs were evaluated using seawater from southern sea near the city of Chang-Won. The used methods for evaluation were Stiff and Davis Index(S&DSI) calculation and several laboratory experiments. The formation potential of inorganic scale fouling was quite great under the examined conditions, which was confirmed by the laboratory experimental results. The inorganic scale was not avoidable fouling if any anti-scaling measures were not applied. The RO showed decreased flux under the scale formation conditions. The increases in S&DSI from 1.43 to 5 made small decreases in flux, which indicated that formation of inorganic scales had more substantial effects on RO flux than amount of inorganic scales.

• Structural Engineering and Mechanics
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• 제33권4호
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• pp.429-446
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• 2009

Three-scale homogenization procedure is proposed in this paper to provide estimates of the effective thermal conductivities of porous carbon-carbon textile composites. On each scale - the level of fiber tow (micro-scale), the level of yarns (meso-scale) and the level of laminate (macro-scale) - a two step homogenization procedure based on the Mori-Tanaka averaging scheme is adopted. This involves evaluation of the effective properties first in the absence of pores. In the next step, an ellipsoidal pore is introduced into a new, generally orthotropic, matrix to make provision for the presence of crimp voids and transverse and delamination cracks resulting from the thermal transformation of a polymeric precursor into the carbon matrix. Other sources of imperfections also attributed to the manufacturing processes, including non-uniform texture of the reinforcements, are taken into consideration through the histograms of inclination angles measured along the fiber tow path together with a particular shape of the equivalent ellipsoidal inclusion proposed already in Sko ek (1998). The analysis shows that a reasonable agreement of the numerical predictions with experimental measurements can be achieved.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2011년도 춘계학술대회
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• pp.19-20
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• 2011

• 한국진공학회:학술대회논문집
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• 한국진공학회 1996년도 제11회 학술발표회 논문개요집
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• pp.132-133
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• 1996