• The Journal of the Korea Contents Association
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• v.15 no.10
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• pp.362-373
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• 2015

This study analysed the effectiveness of aluminium(Al) filter in the added compound filtration for the removal of characteristic radiation from high atomic number material by DQE and image evaluation. 1mm Al was applied to each 0.1, 0.2, 0.3 mm copper and befere and after use were evaluated. Beam quality and DQE were tested by IEC regulations and image quality was evaluated by PSNR, MAE, MSE, CNR, SNR and qualitative analysis was performed by 7 items for resolution and contrast from chest x-ray criteria of national cancer checkup. MTF 10 and 50% were the same by 4.6, 2.54 cycle/mm and NPS, DQE, PSNR MAE, MSE, CNR, SNR and qualitative analysis were all the same or slightly better when Al was not used. PSNR is over 30dB and all significant and at the qualitative analysis, the p-value of t-test was over 0.05. The DQE and image quality evaluation have little difference between before and after use of Al filter and it is effective to use the Al filter for the reduction of skin dose by removal of characteristic radiation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.1 no.1
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• pp.83-90
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• 2000

DEA is a newly developed analyzing tool to measure efficiency evaluation of decision making units (DMU). It compares DMU by radial Projection on the efficient frontier. The purpose of this study is to show reference point approach used for searching solution in multiple objective linear Programming can be usefully used to determine flexible efficient frontier of each DMU In reference point approach, the minimization of ASF Produces an efficient points in frontier and enhances the usefulness of DEA by Providing flexibility in DEA and optimally allocating resources to DMU. Various DEA models can be supported by reference point method by changing the projection direction in order to choose the targets units, standards costs and management benching-marking.

• Journal of Environmental Policy
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• v.10 no.1
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• pp.129-150
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• 2011

This paper proposes an improvement to differentiate assessment procedure for projects in consideration of their environmental impact as a means to improve efficiency in environmental impact assessment ("EIA") procedure. The targets of analysis were limited to lower impact projects. The current EA system in Korea has already attempted to introduce separate proceedings for certain projects.Tangible results from these efforts, however, have been limited. Other countries have adopted a "screening" system to determine whether EIA is applicable to a particular project, and if so, what procedure will be used therein. Therefore, this study suggests the screening as the process wherein need for EIA is determined with respect to projects which have undergone Prior Environmental Review System(PERS) and which appear to have comparatively negligible environmental impact. In this case, EIA can be omitted and the developer can then draft a mitigation plan instead. This study found that exempting certain projects deemed as having low environmental impact can considerably shorten the duration required for both environmental assessment and consultation, thereby improving efficiency. Other expected effects from the adoption of this screening include reduction in delays in project execution due to environmental assessments and reduced red tape through the provision of increased autonomy to developers and the approving authorities.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.8
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• pp.3563-3571
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• 2011

In this research, we analyzed the efficiency of 20 public health centers of Gyeongnam Province during 2007-2009, so weakness of input and output factor were found. We used the CCR, BCC model of Data Envelopment Analysis as a method of evaluation, made a choice human resource as the input variable, made a selection the performance of public health care center, ward as the output variable. The results of this study show that the efficiency of 20 public health centers have got better because Government and Gyeongnam have provided administrative, financial support. It is expected that this research can give good information for effective management of public health centers.

• The Journal of the Korea Contents Association
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• v.19 no.2
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• pp.491-507
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• 2019

The result of this study was to measure the relative efficiency of 133 colleges in south korea and to investigate the differences in the results of college basic competency evaluation. As a result of the study showed that the average difference of efficiency according to the background variables was no significant according to the scale, location, and college evaluation. but differences in the type of establishment were found to vary significantly in S.E model. In addition, it was analyzed that the efficiency of the college with limited funding for the efficiency distribution is highly distributed, which indicates that it is necessary to continuously improve the existing university methods and to assess whether they are being managed effectively. Finally, the limitations of this study are that it used only quantitative data and that additional indicators could result in different outcomes from the results of this study.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.30 no.6
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• pp.452-466
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• 2019

As the spectrum demand increases, securing spectrum resources in a timely manner becomes necessary. This paper proposes a spectrum-band prioritization scheme for establishing an efficient spectrum-use policy. The criteria for spectrum-band prioritization are derived from articles of the Radio Waves Act, and a four-level matrix for priority evaluation is proposed, considering both demand urgency and supply ease. The prioritization processes and items to consider for measuring each criteria are also proposed in order to implement the proposed prioritization scheme. It is expected that the proposed scheme can help secure the spectrum in a timely manner, protect incumbent users properly, and promote new spectrum-based businesses.

• 대학교육
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• s.70
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• pp.92-99
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• 1994

대학의 목적 성취에서 행정직원의 역할은 증대되고, 그들에게 투입되는 인건비는 대학재정의 상당 부분을 차지한다. 대학 조직의 효과성을 제고하고 자원의 효율적인 활용을 도모하기 위하여 행정직원에 대한 평가는 거부될 수 없으며, 조직구성원으로서 감수해야 할 의무라고 할 수 있다. 행정직원에 대한 평가가 실시된다면 하위직뿐만 아니라 상위직까지 모두가 그 대상이 되어야 한다. 행정직원에 대한 평가에는 인적.물적 자원이 소요되고, 평가 결과는 대학의 인적 자원 관리에 많은 기여를 할 수 있다. 따라서 평가는 효율적.효과적으로 수행되어야 하며, 그 결과도 유용하게 활용되어야 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10a
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• pp.193-195
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• 2001

이동체는 끊임 없이 위치 정보를 변경하는 특징을 가지고 있다. 빈번한 데이터 변경이 발생하는 이동체에 대한 효율적인 색인 기법의 대한 연구가 필요하다. 이 논문에서는 이동체의 공간 데이터 표현 방법과 색인 변경 정책을 제안한다. 그리고 제안한 색인 변경 정책에 따른 공간 색인별 성능 평가와 구축된 공간 색인의 영역 질의 처리에 대한 성능 평가를 위한 실험 평가기를 설계한다. 실험을 통해 이동체 데이터베이스에서 효율적으로 사용 가능한 색인을 도출해 낼 수 있으며, 실험 결과물의 하나인 성능 평가기를 사용하여 향후 개발할 이동체를 위한 새로운 색인에 대한 성능 평가도 수행할 수 있다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.12 no.4 s.27
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• pp.233-239
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• 2006

This paper aims to evaluate the operation efficiency of Korean RCC(Rescue Co-ordination Center)/RSC(Rescue Sub-Center) using DEA(Data Envelopment Analysis). for this evaluation, this paper use the quantitative data for DEA analysis with two inputs and four outputs and a qualitative data analysis with the use of expert assessment. The tool for integrating heterogeneous data is fuzzy logic model to decision support system. In this paper, therefore, RCC/RSC evaluates the priority for operation efficiency. The result are found as order as Inchon, Mokpo, Jeju, Donghae, Busan, Pohang, Yosu, Sokcho, Tongyeong, Ulsan, Taean, Gunsan RSC.

• Proceedings of KOSOMES biannual meeting
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• 2005.05a
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• pp.67-72
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• 2005

This paper aims to evaluates the operation efficiency with two inputs and four outputs with the use of DEA(Data Envelopment Analysis), a qualitative data analysis with the use of expert assessment in Korean RCC(Rescue Co-ordination Center)/RSC(Rescue Sub-Center). The tool for integrating heterogeneous data is model that applies fuzzy logic to decision support system In this paper, therefor, RCC/RSC evaluates the priority for operation efficiency. The result are found as order as Inchon, Mokpo, Jeju, Donghae, Busan, Pohang, Yosu, Sokcho, Tongyeong, Ulsan, Taean, Gunsan RSC.