• 한국컴퓨터정보학회논문지
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• 제15권10호
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• pp.201-207
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• 2010

본 논문에서는 대규모 공공관리시스템에 그린IT 개념을 적용한 성능개선을 제안, 개발, 구현하여 관리, 비용, 인력 분야에 대하여 탁월한 성과를 도출하였다. 현재 운영 중인 시스템에 대하여 공공기관의 사용자들이 제시한 성능개선 사항을 분석하여 절감효과를 유발할 수 있는 리소스 중에서 그린IT 개념이 적용 가능한 항목을 선정하여 개선방안을 제시하고 시험운영을 거쳐 실제 시스템에 적용하는 절차로 구현하였다. 대규모 공공관리시스템으로는 국가자격 관리시스템을 대상으로 하여 기존의 개인별 시험용 저장장치를 보안처리를 강화한 온라인 처리과정으로 전환하여 비용 및 인력절감 효과와 관리상의 효율성을 확보하였다. 기존 운영시스템과 비교하여 볼 때 운영인력, 장애처리, 유지보수, 관리비용에서 2배에서 최대 12배의 효율성이 도출되었으며 년 간 최대 500만개의 개인 배포용 저장장치를 절감하였다.

• 한국지열·수열에너지학회논문집
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• 제19권4호
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• pp.27-38
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• 2023

The Government the Republic of Korea is showing a lot of interest in net zero-energy buildings (NZEBs) to reduce energy consumption of buildings and to promote green growth policy in construction sector. The application of building passive technologies and renewable energies is essential to achieving NZEBs. Green remodeling reinforced the insulation of the exterior walls and roofs of the buildings and replaced high-efficiency windows and doors. In this study, the energy performance before and after green remodeling applied in a detached house was comparatively analyzed for baseline scenario and three different ones, ALT 1, ALT 2 and ALT 3. A building modeling and simulation software (DesignBuilder V7.0) with EnergyPlus (V9.4) calculation engine was used to calculate the energy demand and energy consumption for each scenario. Based on the calculation results of the building's energy demand for baseline, it was determined that the target building required more heating energy than cooling energy. The simulation results also showed that the implementation of building envelope performance improvement technologies (ALT 1) could notably decrease the heating energy consumption of the building. After the remodeling (ALT 1), the source energy consumption per unit floor area was assessed to be reduced by 65.2%, compared to prior remodeling of 338.7 kWh/m² -y. Meanwhile, ALT 2 can achieve energy savings of 67.7% and ALT 3 can achieve savings of 73.1%. Following completion of the remodeling project, actual construction costs, and on-site measurements and verification results will be gathered and compared with the simulation results. Additionally, economic analysis including construction costs and payback period will be conducted using actual site data.

• 환경정책연구
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• 제9권4호
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• pp.3-27
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• 2010

중앙정부의 환경투자 관련 제조업의 비용구조를 트랜스로그 가변비용함수를 활용하여 분석하였으며, 주요 결과는 다음과 같다. 첫째, 중앙정부에서 진행하는 환경투자의 적정 여부를 파악하기 위해 충족도를 살펴본 결과, 적정수준인 1에 못미치는 0.7230으로 분석되었으며, 이에 따라 생산비효율이 발생하고 있다. 그러므로 중앙정부는 환경투자를 적정수준으로 끌어올릴 수 있는 방안을 마련해야 할 것이다. 또한 중앙정부는 환경투자의 부족에도 불구하고 잠재가격이 시장가격보다 작아 투자여건은 유리하지 않다. 그러나 중앙정부의 환경투자는 제조업체의 산출증대를 가져오고, 가변비용을 절감하며, 규모의 경제를 가져오는 것으로 분석되었다. 둘째, 제조업체의 공해방지투자와 중앙정부의 환경투자를 비교해 본 결과, 전자 후자 모두 투자가 적정수준에 못미치고, 투자여건이 양호하지 못하며, 규모의 경제를 가져오고, 산출 증대에 기여하는 것으로 나타났다. 특히 중앙정부의 환경투자는 정(+)의 잠재가격에 따라 효율적이므로 가변비용을 절감하게 된다. 이에 따라 제조업체는 중앙정부의 환경투자 부족이 가변비용을 증가시켜 생산비효율을 가져오고 있다. 그러나 제조업체의 공해방지투자는 부(-)의 잠재가격에 따라 비효율적이므로 가변비용을 절감하지 못하고 있다. 이러한 제조업체의 공해방지투자 부족은 오히려 가변비용을 절감시킴에 따라 생산효율을 가져오고 있다. 그러므로 제조업체는 공해방지투자를 적정수준으로 끌어올려 효율화함으로써 가변비용을 절감시켜 생산효율을 달성해야 할 것이다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2003년도 봄 학술발표회 논문집
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• pp.427-430
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• 2003

Steel piling for abutments of new and replacement bridges can be aesthetically attractive and cost effective. Use of embedded steel sheet piling brings savings in dead load, provides a compliant retaining wall, and permits speedier construction. In addition, for replacement bridge projects, traffic interruption can be minimized. It is hoped that this study will encourage designers and constructors to consider a steel substructure option more frequently during the conceptual and preliminary design phases of projects and thereby to take advantage of the Potential to construction more efficiently.

• The Korean Journal of Pain
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• 제25권3호
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• pp.143-150
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• 2012

Spinal cord stimulation has become a widely used and efficient alternative for the management of refractory chronic pain that is unresponsive to conservative therapies. Technological improvements have been considerable and the current neuromodulation devices are both extremely sophisticated and reliable in obtaining good results for various clinical situations of chronic pain, such as failed back surgery syndrome, complex regional pain syndrome, ischemic and coronary artery disease. This technique is likely to possess a savings in costs compared with alternative therapy strategies despite its high initial cost. Spinal cord stimulation continues to be a valuable tool in the treatment of chronic disabling pain.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2205-2216
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• 2011

Governments seek to advance public industry had planed to decreased by 50% of KORAIL management deficit in 2010, The transition to a profit in 2012. In addition. The government will not achieve the goal by 2010, management announced plans to review the case, and privatization. Office of unprofitable station and vehicle maintenance, maintenance work to make cost savings through outsourcing hed discussed how to create KORAIL advancement. April 2011 the government, "A study on th Efficiency of Conventional Railway Infrastructure Maintenance R&D Report" progresses, conventional railway infrastructure maintenance has focused attention on the field. However, the general maintenance of railway facilities without the knowledge and safety awareness, as compared to foreign railway personnel, and productivity has pointed out the contradiction. Economy and efficiency of the railway in order to pursue a public awareness and safety and professionalism is required. In this study, the conventional railway infrastructure maintenance in accordance with Facts would like to introduce efficiency measures.

• Journal of Hospice and Palliative Care
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• 제19권1호
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• pp.5-10
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• 2016

Purpose: This study reviewed what the location of death (LOD) means as an outcome and how to use LOD to assess end-of-life (EOL) care. This study also examined the reason why LOD is significant for the quality of EOL care. Methods: A literature review was performed, using LODs and home deaths as outcomes in the field of EOL care, and analyzed the findings associated with key fields in regards to LOD. Results: Palliative care research used LOD, in particular, hospital death (versus home death) as a significant outcome when examining cost savings, quality of life care, and patient and family preferences. Based on substantial evidence from previous research, home hospice or continuous palliative care in non-hospital settings (i.e. homes, nursing homes) have been designed and available for dying patients in developed countries. Conclusion: The LOD delivers practical significance as an outcome for diverse reasons. In-depth examination on LOD in South Korea is needed despite limitations to interpretation of its meaning in the country.

• Journal of Power Electronics
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• 제12권1호
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• pp.215-222
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• 2012

Lighting represents a significant component of commercial buildings, particularly office buildings. Fluorescent lighting is invariably used in all commercial, industrial and residential areas. A significant amount of lighting energy is wasted every day by leaving the lights on and not utilizing daylight energy. However, if daylight illuminance can be harnessed, this will reduce the electricity consumption of fluorescent lamps and save energy. This paper explains possible significant savings in lighting energy consumption and hence in costs, without reducing the performance and visual satisfaction in office or industrial buildings. It is proposed to obtain energy saving by reducing the supply voltage without degradation in lighting performance. Experimental results confirm that as much as 20% of electrical energy can be saved by reducing about 9% of the supply voltage, without noticeably affecting light output while complying with lighting standard limits.

• 한국유기농업학회지
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• 제21권4호
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• pp.501-522
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• 2013

This study has performed comparative analysis on benefit indicators in agricultural irrigation and drainage project cases between Korea and Japan. The irrigation and drainage project with publicity should do economic analysis of direct benefit factors as well as indirect benefit factors. However, traditional economic evaluations are used that benefit factors are lack of consistency and focused on direct benefits. Therefore, the purpose of this study was to develop indicators for the economic evaluation of irrigation and drainage projects. We conducted a case study between Korea and Japan. The resulting benefit factors was divided into direct factors and indirect factors. The direct benefit factors were increase in income, cost savings. The indirect benefit factors were protection of property due to flooding, agricultural promotion, aesthetic improvement. The implications of this study are that the indicators of economic analysis can be evaluated and easily applied. Moreover, these indicators could promote the feasibility of economic analysis.

• 설비공학논문집
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• 제30권1호
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• pp.10-16
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• 2018

The climate of summer in Korea is quite hot and humid. Many studies have been carried out to reduce the energy required for operating a dehumidifier. The dehumidifier is mainly connected to the cooling system since it operates in the summer. Conventional dehumidification methods often require additional cooling and energy for dehumidification. In this study, a system for increasing the efficiency by applying a membrane was analyzed. Its energy saving effect was analyzed when it was applied to residential buildings. Economic efficiency was also evaluated. As a result of this study, 9.0% energy savings were achieved for residential buildings. The investment recovery period was 28.9 years. Such long investment recovery period was because the initial investment cost was excessive and annual energy saving only appeared in the summer.