• 한국기계기술학회지
• /
• 제13권2호
• /
• pp.9-19
• /
• 2011

Most real world design evaluation and risk-based decision support combine quantitative and qualitative (linguistic) variables. Decision making based on conventional mathematics that combines qualitative and quantitative concepts always exhibit difficulty in modelling actual problems. The successful selection process for choosing a design/procurement proposal is based on a high degree of technical integrity, safety levels and low costs in construction, corrective measures, maintenance, operation, inspection and preventive measures. In this paper, a design decision support framework using a composite structure methodology grounded in approximate reasoning approach and evidential reasoning method is suggested for design evaluation of machinery space of a ship engine room at the initial stages. An illustrative example is used to demonstrate the application of the proposed framework.

• 대한안전경영과학회:학술대회논문집
• /
• 대한안전경영과학회 2008년도 추계학술대회
• /
• pp.623-631
• /
• 2008

In this study, with the objects of 173 institutions of university and research institutions, investigation was carried out through visit investigation and questionnaire investigation. Frequency and strength of occurrences was acquired mainly through universities and research institutions which have reported occurrences of accidents to the Ministry of Education, Science, and Technology. Quantitative danger evaluation was conducted through frequency and strength of occurrences. Case study was carried out by selecting bio science laboratory of university and as the result of this study, degree of danger among the inspection objects of bio science laboratories, laboratory work place was evaluated as the most dangerous with the scores of 155.00 and as the result of average danger level, compression gas cylinder was evaluated as the most dangerous with the scores of 6.4000.

• Membrane and Water Treatment
• /
• 제10권2호
• /
• pp.149-154
• /
• 2019

The information matter-element system was built to assess safety of water source. Based on the thought of multiindex fusion, fuzzy matter-element model evaluating water source behavior was constructed by matter-element transform. This model can process comprehensively hydrogeological data, ecological environment, water pollution, surface disturbance, and so on. Water source safety behavior can be described by the qualitative and quantitative manners. According to the development trend of quantitative results, water source safety behavior can be expressed dynamically. As an example, the proposed method was used to assess safety status of 7 water sources in the region. The numerical example shows that the proposed method is feasible and effective, and the evaluation results are reasonable.

• 기술혁신학회지
• /
• 제13권3호
• /
• pp.494-512
• /
• 2010

전 세계적으로 융복합 지향적 연구활동이 강화됨에 띠라 연구분야의 다양성과 새로운 연구분야의 개척은 물론 국가간 협력을 통한 연구가 활발히 진행되고 있다. 이러한 새로운 형태의 연구가 계속 발굴되고 있는데 반해 그 연구를 정확히 평가하고 객관적으로 검증하는 방법에는 한계가 있는 현실이다. 동료평가(peer Review)만으로는 정확한 연구과제 평가가 제한적이라는 인식이 확대되고 있으나 이를 보완할 객관적인 평가방법의 제사는 아직 실증적으로 검증되지 못하고 있다. 따라서 본 논문에서는 최근 새롭게 추진된 국가연구개발사업에 동료평가와 신규 계량지표에 의한 평가를 적용하여 그 결과의 반영비율 및 상관도를 측정하였다. 그 결과 계량지표의 적용이 실증적으로 유의미한 결과를 갖는 것으로 분석되었다.

• 농촌계획
• /
• 제22권4호
• /
• pp.25-36
• /
• 2016

The purpose of this study is to construct a quantitative evaluation method that can analyze the policy effectiveness with the construction of a implicit composite index incorporating spatial econometrics models. In order to propose a methodological framework for the program evaluation, this study conducts an empirical analysis with the application of the Comprehensive Rural Village Development Project (CRVDP) which explicitly claims to achieve comprehensive goal of community development. The present study pays particular attention to quantifying the composite evaluation index and drawing net effect through the application of a series of spatial econometrics models. The spatial unit of the analysis is drawn at Eup-Myeon level in rural areas in Korea, and the time horizon is in between 2005 and 2010. We utilize the Korean Agricultural Census data in 2005 and 2010. Three steps of methodological processes are needed to satisfy the objective of the present study. First, we apply factor analysis to construct the composite index that represents comprehensive settlement environment in rural area. The index should be matched with the main objective of the CRVDP. Second, we apply the derived index to a series of spatial econometrics model as dependent variable. Lastly, utilizing the estimated coefficients of the econometrics models, we apply decomposition technique to estimate CRVDP's net effect from both cross-sectional and longitudinal perspectives. We find that the results of the decomposition analysis by the execution of the CRVDP are positively associated with the explicit object of the project.

• 대한인간공학회지
• /
• 제29권2호
• /
• pp.203-210
• /
• 2010

For the development of a better product which fits to the target user population, physical workloads such as reach and visibility are evaluated using digital human simulation in the early stage of product development; however, ergonomic workload assessment mainly relies on visual observation of reach envelopes and view cones generated in a 3D graphic environment. The present study developed a quantitative assessment method of physical workload in a digital environment and applied to the evaluation of a Korean utility helicopter (KUH) cockpit design. The proposed assessment method quantified physical workloads for the target user population by applying a 3-step process and identified design features requiring improvement based on the quantified workload evaluation. The scores of physical workloads were quantified in terms of posture, reach, visibility, and clearance, and 5-point scales were defined for the evaluation measures by referring to existing studies. The postures of digital humanoids for a given task were estimated to have the minimal score of postural workload by finding all feasible postures that satisfy task constraints such as a contact between the tip of the index finger and a target point. The proposed assessment method was applied to evaluate the KUH cockpit design in the preliminary design stage and identified design features requiring improvement. The proposed assessment method can be utilized to ergonomic evaluation of product designs using digital human simulation.

• 한국방사선학회논문지
• /
• 제8권4호
• /
• pp.147-153
• /
• 2014

디지털 Mammography영상에서 압축률에 따른 화질의 특성에 대해 정량적 평가와 정성적평가를 실시하였다. ACR Accreditation phantom을 대상으로 JPEG2000, JPEG 압축알고리즘을 적용하여 압축한 후 Detection Score를 측정하여 압축률에 상관없이 10점 인정기준을 충족하였다. 또한 실제미세병소 영상을 선정하여 압축을 실시하여 확대율에 따른 진단능의 변화를 측정하여 20:1 이상 압축 후 50% 이상 확대 시 진단능에 영향을 미칠 수 있음을 알 수 있었다. 또한, 정량적 평가방법인 PSNR, RMSE, MAE, SSIM등을 측정하여 압축률에 따른 원본영상과의 차이점은 비교적 허용 가능한 오차범위 내의 값이 측정되었다. 또한 MTF 측정을 통해 Full Field Digital Mammography 영상의 화질이 진단에 적합한 영상임을 알 수 있었다.

• 한국방재학회 논문집
• /
• 제9권5호
• /
• pp.1-7
• /
• 2009

피난안전성의 정량적인 평가를 위해 고려되는 정량적요소로는 피난거리와 피난장해를 대표적으로 들 수 있으며, 선행 연구에서 이론적인 증명과 단순모델 및 실재평면모델을 이용하여 일반성과 적용성에 대하여 검토되었다. 그러나 보다 현실적인 평가수법의 개발을 위해서는 피난경로상에 산재해 있는 다양한 피난장해에 대한 종합적인 검토가 가능해야 하며, 이를 위해서는 각 피난장해와 피난자의 피난조건이 피난안전성에 미치는 영향력에 대한 정량화가 필요하다. 따라서 본 연구에서는 피난장해와 피난자의 피난조건에 대한 이론적 검토를 통하여 피난경로상에 예상되는 다양한 피난장해의 정량화 함수를 도출하고, 선행연구에서 제시된 피난안전성 평가수법에 대입하고, 단순모델을 이용하여 피난자의 피난조건과 피난장해를 동시에 고려한 평가법의 적용성과 타당성에 대한 검토를 행하는 것으로, 보다 현실적인 피난안전성에 대한 정량적인 평가수법개발로의 연구적 발전을 도모한다.

• 한국기후변화학회지
• /
• 제9권1호
• /
• pp.81-90
• /
• 2018

"The Framework Act on Low-Carbon Green Growth" specifies the requirements for the development and verification of emission factors for establishing reliable national greenhouse gas statistics. The scope of the regulations covers the development and validation of energy, industrial processes, solvents and other product use, agriculture, land use, land use change and emission and absorption coefficients of the forestry and waste sector as defined in the 1996 IPCC Guideline and GPG 2000, The minerals sector to be covered in this study belongs to industrial processes. As a representative method for quantifying and evaluating GHG emission factors, there are emission grade quality grading and DARS (Data Rating Rating System) in the 'Procedures for Preparing Emission Factor Documents (1997)' reported by US-EPA. However, the above two methods are not specific and comprehensive, and lack the details for accurate emission factor verification. Therefore, there is a need for a method for verifying and quantifying certified greenhouse gas emission factors that reflects characteristics of each industry sector in Korea and accord with IPCC G/L and GHG target management. In this study, we conducted a weighted study on quantitative and evaluation lists of emission factor using questionnaires to develop a more accurate methodology for quantifying national greenhouse gas emission factors in the mineral sector. Quantification and evaluation of emission factor are classified into essential verification and quality evaluation. The essential verifications are : administrative compatibility, method of determining emission factors, emission characteristics, sampling methods and analysis methods, representativeness of data. The quality evaluations consisted of the quality control of the data, the accuracy of the measurement and analysis, the level of uncertainty, not directly affect the emission factor, but consisted of factors that determine data quality.

• 대한방사선기술학회지:방사선기술과학
• /
• 제42권5호
• /
• pp.329-334
• /
• 2019

This study was purpose to quantitative evaluation of noise power spectrum(NPS) and studied the quantitative evaluation and characteristics of modulation transfer function(MTF) by obtain the optimal edge image by using Coil in magnetic resonance imaging(MRI) equipment through Fujita theory using edge method. The MRI equipment was used (Tim AVANTO 1.5T, Siemense healthcare system, Germany) and the head matrix coil were 12channels(elements) receive coil. The NPS results of showed the best value of 0.004 based on the T2 Nyquist frequency of $1.0mm^{-1}$, and the MTF results of showed that the T1 and T2 values were generally better than the T1 CE and T1 CE FC values. The characteristics of this study were to explain the characteristic method of image quality evaluation in general. To present the quantitative evaluation process and results in the evaluation of MRI image characteristics in radiology.