• 농촌지도와개발
• /
• 제15권4호
• /
• pp.577-597
• /
• 2008

The purpose of this study is to examine the effects of residents' perceptions of tourism impact and conflicts on residents' participation in rural tourism village. Method of analysis involves factor analysis and regression analysis in this study. In order to measure the level of perception, three factors(economic benefits, social benefits, social and environmental cost) are derived from the factor analysis. And also in order to measure the level of conflict, two factor(openness of information, leading of operation) are derive from the factor analysis. The result of regression analysis indicate that perceived economic benefits and social benefits are rather greater impacts on residents' participation than social and environmental cost, and also openness of information is rather greater impacts on residents' participation than leading of operation.

• 비파괴검사학회지
• /
• 제29권3호
• /
• pp.230-234
• /
• 2009

As concrete ages, the surrounding environment is expected to have growing influences on the concrete. As all the impacts of the environment cannot be considered in the strength-estimating model of a nondestructive concrete test, the increase in concrete age leads to growing uncertainty in the strength-estimating model. Therefore, the variation of the model error increases. It is necessary to include those impacts in the probability model of concrete strength attained from the nondestructive tests so as to build a more accurate reliability model for structural performance evaluation. This paper reviews and categorizes the existing strength-estimating statistical models of nondestructive concrete test, and suggests a new form of the strength-estimating statistical models to properly reflect the model uncertainty due to aging of the concrete. This new form of the statistical models will lay foundation for more accurate structural performance evaluation.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1994년도 하계학술대회 논문집 C
• /
• pp.1505-1508
• /
• 1994

Lately in KEPCO, the power plant capacity has increasingly become larger than before and it has become difficult to get R.O.W for T/L. Therefore KEPCO decided to increase its system voltage level from 345kV to 765kV. By doing this, KEPCO would like to expand its transmission capability by less T/L route. In 765kV system, we should consider various kinds of environmental impacts that can be neglected in lower voltage level. These environmental impacts are very important factor in T/L design. That can be changed greatly according to the selected conductor. And also conductor selection has relation with the economy of T/L construction directly. This paper deals with some general factors to be considered and basic principles about the conductor and ground wire selection for 765KV T/L with referring to the experiences of foreign utilities.

• Earthquakes and Structures
• /
• 제2권1호
• /
• pp.1-24
• /
• 2011

During very strong earthquakes, seismically isolated buildings may experience large horizontal relative displacements, which may lead to poundings if an insufficiently wide clearance is provided around the building. This paper investigates, through numerical simulations, the effectiveness of using rubber bumpers, which could be attached at locations where it is likely to have impacts, in order to act as shock-absorbers. For the simulation of the dynamic behavior of such rubber bumpers during impacts, a nonlinear force-based impact model, which takes into account the finite thickness of the rubber bumpers, has been developed. Subsequently, a series of parametric analyses are performed to assess the effect of the gap size, the earthquake characteristics and the thickness, compressive capacity and damping of the bumpers. The stiffness of the moat wall is also parametrically considered during poundings of a seismically isolated building, as another potential mitigation measure for poundings of seismically isolated buildings.

• KIEAE Journal
• /
• 제11권2호
• /
• pp.45-57
• /
• 2011

As climate change and environmental degradation become more evident, the public's concern and knowledge on sustainable development requires planners to have regards to social impacts and long term economic viability, as well as environmental impacts. The main objective of this study is to analyze existing sustainability assessment tools for single detached houses. The most widely used oversea tools are selected. From analysis on the existing assessment tools, "Impact Estimator" by Athena Institute, "Bees 4.0" by NIST, "CASBEE for Home" by JSBC, "Envest for Housing" by Energy Saving Trust, "LISA" by Center for Sustainable Technology, "SBTool" by iiSBE (International Initiative for Sustainable Built Environment), it can be seen that the current sustainability assessment programs are in need of much improvement. The selected programs are analyzed on scope of program setting & running, data input & output, assessment categories, and strength & weakness. This study is to supplement the existing sustainability assessment tools for single detached houses, and provide information for the development of web-based program to assist architects or home owners to plan sustainable houses in Korea in the schematic design stage.

• Annals of Occupational and Environmental Medicine
• /
• 제35권
• /
• pp.20.1-20.7
• /
• 2023

The policy proposal by the current Korean government that proposes flexible overtime rules is causing social controversy. This study has explored the 612 experts' opinions on the occupational safety and health impacts of the policy using an online self-report survey. They expected short-term overwork (87.25%), overwork inequality (86.44%), irregular working hours (84.31%), chronic overwork (84.15%), long working hours (83.66%), and unpredictability of working hours (81.86%) as a result of the policy change. They also responded that the policy change would increase industrial accident deaths (87.25%), mental illnesses (87.09%), deaths due to overwork or cardiovascular diseases (83.84%), and accidents (83.33%). They disagreed that the government's flexibilization policy, while agreeing that the necessity of policies on regulating night work (94.77%), guaranteeing wages to eliminate overtime (90.36%), establishing working time regulations for the bogus self-employed (82.84%), and applying the 52-hour workweek system to all workplaces (76.47%). These expert opinions are consistent with previous research on the health effects of working hours.

• 산업경영시스템학회지
• /
• 제28권3호
• /
• pp.1-9
• /
• 2005

We developed the logical methods to analyze economic impacts of standardization and cleared up effects of performing KS in micro and macro aspects. This study is performed through analysing foreign studies and results from surveys. The advanced methods performing standardization as a form of 'Korean industrial standards' are suggested here, which are based on results of this study. The major consequences of this study are followings. The micro economic impact is that each company gets 604.5 millions won a year through performing KS A and F(discount rate 4.5%) and 1.46 trillions won is the macro economic impact through performing total KS A and F, which comes to 0.245% of GDP.

• Water Engineering Research
• /
• 제4권1호
• /
• pp.31-43
• /
• 2003

The impacts of climate change on soil moisture in sub - Arctic watershed simulated by using the hydrologic model. A range of arbitrary changes in temperature and precipitation are applied to the runoff model to study the sensitivity of soil moisture due to potential changes in precipitation and temperature. The sensitivity analysis indicates that changes in precipitation are always amplified in soil moisture with the amplification factor for flow. The change in precipitation has effect on the soil moisture in the catchment. The percentage change in soil moisture levels can be greater than the percentage change in precipitation. Compared to precipitation, temperature increases or decreases alone have impacts on the soil moisture. These results show the potential for climate change to bring about soil moisture that may require a significant planning response. They are also indicative of the fact that hydrological impacts affecting water supply may be important in consider-ing the cost and benefits of potential climate change.

• 환경영향평가
• /
• 제26권5호
• /
• pp.354-364
• /
• 2017

우리나라는 경제개발과 물류 유통의 증대를 위해 사회기반시설인 도로에 막대한 투자를 하고 있다. 이로 인해 생태적 보전가치가 있는 지역의 훼손과 생태계의 파편화, 생활환경의 악화 등의 환경적 문제가 야기되고 있다. 본 연구는 도로 건설로 인한 환경훼손을 사전에 방지하거나 최소화할 수 있도록 도로건설계획의 기본구상과 노선선정 단계에서 적용 가능한 계획지표를 도출하였다. 이를 위해 도로와 관련된 행정규칙과 전략환경영향평가서 검토의견, 기존 연구보고서 등을 분석하였으며, 선정된 계획지표에 대한 적용사례를 조사하였다. 또한 도출된 지표를 도로건설계획에 효율적 합리적으로 적용 평가하기 위한 방법으로 대안 평가를 제안하였으며, 대안 평가 시 계획지표에 대한 환경영향을 판단할 수 있는 기준을 마련하고 사례에 적용하였다. 이번 연구결과는 과거의 도로건설계획에 대한 친환경성 지표를 보완하고 계획지표의 합리적 적용을 위한 방안과 계획지표의 영향 여부 판단기준을 마련했다는 측면에서 의의가 있다.

• 한국산학기술학회논문지
• /
• 제17권5호
• /
• pp.325-331
• /
• 2016

본 연구에서는 홍수 시 부유물의 충돌하중을 고려하여 교량의 홍수 취약도 곡선을 도출하였다. 자연재해에 의해 불가피하게 발생하는 사회기반시설물의 손상 또는 기능 손실은 심각한 인명피해 뿐만 아니라 국가적으로 사회적, 경제적 손실을 불러올 수 있다. 따라서 국가주요시설물을 재난으로부터 효과적으로 유지관리하기 위해 취약도 곡선은 중요한 도구로 사용되고 있다. 특히 한국은 산지 지형이 많이 형성되어 있고 하절기에 강수량의 2/3이상이 집중되어, 홍수 피해 가능성이 매우 높다. 홍수 시 교량 파괴의 주원인으로는 부유물의 충돌과 하상세굴이 있는데, 부유물의 충돌은 여러 가지 불확실성으로 인하여 상대적으로 연구가 부족한 실정이다. 본 연구에서는 FERUM-ABAQUS 기반의 취약도 해석 시스템을 도입하여, 홍수시 부유물의 충돌에 대한 교량의 취약성을 평가하였다. 교량의 취약도 해석을 효과적으로 수행하기 위하여 한계상태함수, 손상도 지수, 확률변수, 유한요소모델, 취약도 해석 소프트웨어 시스템을 주로 고려하였으며, 가속도 및 변위 응답해석을 통하여 모델 상태를 확인하였다. 다음으로는 홍수 시 부유물 충돌에 발생 가능한 다양한 파라미터를 기반으로 교량의 취약도 곡선을 성공적으로 도출하였다.