• Journal of Environmental Impact Assessment
• /
• v.24 no.4
• /
• pp.317-331
• /
• 2015

A major barrier to the spread and vitalization of renewable energy lies in its economic infeasibility. And yet, there is a disparity in estimating the economic feasibility between supply and demand sides. Taking this into account, we calculate an appropriate level of mini-solar panel subsidies provided by the Seoul metropolitan government. More pointedly, this research investigates the receptivity and social equity of the subsidy program based on the analysis of the program's financial feasibility. The results show that the subsidies can have anticipated effects for the heavy electricity consumption group but not for the low electricity consumption group. Specifically, estimated pay-back periods for groups of 401kWh ~ 500kWh (per month) users, 201 kWh ~ 400kWh users and 101kWh ~ 200kWh were approximately 5years, 8 ~ 9 years and 12 years, respectively. This implies that differential scales of the subsidies can better contribute to reducing regressive difference between the groups and meeting the goal of social equity in regards to energy justice.

• The Journal of Engineering Geology
• /
• v.9 no.3
• /
• pp.187-206
• /
• 1999

A computer program to numerically predict the permeability tensor of fractured rocks is developed using information on discontinuities which Borehole Televiewer and Borehole Image Processing System (BIPS) provide. It uses orientation and thickness of a large number of discontinuities as input data, and calculates relative values of the 9 elements consisting of the permeability tensor by the formulation based on the EPM model, which regards a fractured rock as a homogeneous, anisotropic porous medium. In order to assess feasibility of the program on field sites, the numerically calculated tensor was obtained using BIPS logs and compared to the results of pumping test conducted in the boreholes of the study area. The degree of horizontal anisotropy and the direction of maximum horizontal permeability are 2.8 and $N77^{\circ}CE$, respectively, determined from the pumping test data, while 3.0 and $N63^{\circ}CE$ from the numerical analysis by the developed program. Disagreement between two analyses, especially for the principal direction of anisotropy, seems to be caused by problems in analyzing the pumping test data, in applicability of the EPM model and the cubic law, and in simplified relationship between the crack size and aperture. Aside from these problems, consideration of hydraulic parameters characterizing roughness of cracks and infilling materials seems to be required to improve feasibility of the proposed program. Three-dimensional assessment of its feasibility on field sites can be accomplished by conducting a series of cross-hole packer tests consisting of an injecting well and a monitoring well at close distance.

• Journal of the Korean Society for Marine Environment & Energy
• /
• v.17 no.4
• /
• pp.274-282
• /
• 2014

The Korean government is considering the implementation of the marine debris pollution abatement technology program (MDPATP) to mitigate the negative impacts of marine debris and systematically manage marine debris through scientific researches such as monitoring and environmental impact assessment of marine debris. In this regard, this study attempts to analyze the economic feasibility of the MDPATP in order to provide policy-maker with useful information. To this end, the indices for economic feasibility such as net present value (NPV), benefit/cost (B/C) ratio, and internal rate of return (IRR) are presented. The results show that NPV, B/C ratio, and IRR are computed to be 45.7 billion won, 2.72, and 17.12%, respectively, which are bigger than 0, 1.0, and 5.5%, and that the MDPATP passes the cost-benefit analysis. Thus, it is concluded that it is socially profitable to conduct the MDPATP.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
• /
• v.7 no.3
• /
• pp.55-63
• /
• 2012

This study evaluated the economic feasibility for the Oriental Medicine Hospital is established in W-city. To analyze the demand and supply of Oriental Medicine Hospital status and population trends were analyzed inthe hospital service area. As a result, the Service Area of the demand for Oriental Medicine were met by the S-Oriental Hospital. Thus, On the demand side to assess the adequacy of Oriental Hospital established does not make sense. So, Oriental Hospital of 50 beds and 70 beds, separated by the economic feasibility was evaluated. As a result, the Oriental Hospital opened was found to be not economically feasible.

• Journal of Korean Neurosurgical Society
• /
• v.44 no.1
• /
• pp.15-18
• /
• 2008

Objective : C2 laminar screw fixation is considered as an excellent alternative to Magerl's transfacetal approach or Harms construct for the atlantoaxial stabilization. However, to our knowledge, there is no report on the feasibility of the new approach to Korean population. We investigated morphometric parameters of the dorsal arch of the C2 to provide the quantitative data for the feasibility of laminar screw fixation. Methods : One-hundred-and-two patients' cervical computed tomography had been reconstructed and investigated on the anatomical parameters related with C2 laminar screw placement. Sixty patients were male and forty-two patients were female. Measurements included the laminar thickness and slope, spino-laminar angle, and maximal screw length. Results : Ages ranged from 20 to 81 and the mean age was 48.4. Mean laminar thickness was 5.7 mm (${\pm}1.0$) (5.8 mm in male and 5.4 mm in female). Fifty-one patients (50%) had a laminar thickness smaller than 5.5 mm at least unilaterally, therefore the patients were considered as inappropriate candidates for the laminar screw fixation in the smaller side of the laminae. Mean value of maximal length of screw was 33.3 mm (34.3 mm in male and 31.9 mm in female). Mean spino-laminar angle was $43.2^{\circ}$ and mean slope angle was $32.9^{\circ}$. Conclusion : Half of patients had inappropriate laminar profiles to accommodate a 3.5 mm screw in at least one side of the axis. The three-dimensional computed tomography reconstruction is mandatory for the preoperative assessment for the feasibility of the C2 lamina.

• 한국항공운항학회:학술대회논문집
• /
• 2016.05a
• /
• pp.108-116
• /
• 2016

Structured Checklist of System Aviation Safety Oversight had been categorized by HFACS. In this Study, Findings of Aviation Safety oversight, have been categorized by HFACS. Thus, those two categorized results have difference in incongruity clause that can be concluded that Structured Checklist has lack of elements. Therefore, we are able to identify validity and suitability of checklist that need to be restructured and redeveloped by performing test analysis through this study.

• Journal of Ocean Engineering and Technology
• /
• v.22 no.4
• /
• pp.72-77
• /
• 2008

General aspects of deepwater petroleum exploration and production were identified and related technical challenges were addressed. Historical perspectives, insight, processes, and engineering applications are reviewed to enhance the design capability of the domestic offshore industry. The technical challenges and unique aspects of deepwater exploration and production were identified. The assessment of deepwater exploration, drilling, and production systems is a key stage for performing the front end engineering design (FEED). The global trends in deepwater development, including the feasibility for Korea, were reviewed.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
• /
• 2003.09a
• /
• pp.354-355
• /
• 2003

In this study, a risk-based cleanup approach using the leaching potential was suggested for the soil vapor extraction (SVE) process. A multi-component model was adopted with local equilibrium assumption (LEA), and Raoult's law was applied to estimate the leaching potential for BTEX. Finally, a risk analysis was conducted based on the leaching pontential calculated. To complete the feasibility of this approach, more investigations and discussions will be required in future.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2005.07a
• /
• pp.805-807
• /
• 2005

A basic assessment is presented of the technical, economic and strategic challenges expected for manufacturing displays in a roll-to-roll format. Two general pathways are considered; one that results in dramatic cost reductions but results in sacrificing product performance, and another which is an extension of the conventional FPD cost-reduction from increased substrate size. While Roll-to-Roll fabrication is fundamentally possible, feasibility experiments will be required to address the most significant technical challenge: achieving and managing acceptable yield. In all respects, the efforts to achieve RTR manufacturing will be assisted by overlapping interests in other application areas such as flex circuit, photovoltaics and large area lighting.

• Journal of Environmental Impact Assessment
• /
• v.9 no.4
• /
• pp.349-362
• /
• 2000

In the study, the feasibility of landscape ecological measures as indices system for interpretation and evaluation of regional ecosystem was investigated through the application to Yongin City. Each patch metrics well showed the class structure and supplemented the class metrics, and class metrics also showed well the landscape structure and supplemented the landscape metrics. And the change analysis through subtraction of two set of landscape ecological measurement in two point of time showed the dynamic trends very well. One of the dynamic trends in Yongin City was the rapid fragmentation. While there was no landcover data on Yongin City, using Landsat data and remote sensing techniques were proved to be efficient and effective to produce the digital landcover data.