• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 1997년도 추계학술대회논문집; 한국과학기술회관; 6 Nov. 1997
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• pp.222-226
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• 1997

The reproducibility of measured level is a prior condition for the reliable assessment of the sound insulation performance. To review the reproducibility of impact sound level, 20 floors were selected in highrise apartment house, and then impact sound levels of two kinds of typical floors were measured with 10 times in each receiving point. The impact sound insulation class values were derived with a standard tapping machine and bang machine. Inspection of the result showed that smaller scale of the room caused to lower the reproducibility and that the higher values of standard deviation in lower frequency caused to deteriorate the reliability of assesment. Thus to enhance the reproducibility of the impact sound insulation class, greater allowable deviation of measured level is required in lower frequency than in higher one.

• 대한전기학회논문지:전력기술부문A
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• 제49권4호
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• pp.195-198
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• 2000

This paper illustrates a new method for constructing composite power system effective load duration curve(CMELDC) at load points. The main concept of proposed method is that the CMELDC can be obtain from convolution integral processing of the outage probabilistic distribution function of not supplied power and the load duration curve given at each load point. The effective load duration curve (ELDC) at HLI plays an important part in probabilistic production simulation, reliability evaluation, outage cost assessment and power supply margins assesment for power system planning and operation. And also, the CMELDC at HLII will extend the application areas of outage cost assessment and reliability evaluation at each load point. The CMELDC at load points using the Monte Carlo method and a DC load flow constrained LP have already been developed by authors. The effective load concept at HLII, however, has not been introduced sufficiently in last paper although the concept is important. In this paper, the main concept of the effective load at HLII which is proposed in this study is defined in details as the summation of the original load and the probabilistic loads caused by the forced outage of generators and transmission lines at this load point. The outage capacity probabilistic distribution function at HLII can be obtained by combining the not supplied powers and the probabilities of the not supplied powers at this load point. It si also expected that the proposed CMELDC can be applied usefully to research areas such as reliability evaluation, probabilistic production cost simulation and analytical outage cost assessment, etc. at HLII in future. The characteristics and effectiveness of this methodology are illustrated by case study of IEEE-RTS.

• 한국농공학회논문집
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• 제55권2호
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• pp.47-57
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• 2013

This study is to assess the reduction of non-point source pollution loads for rice straw mulching of upland crop cultivation at a watershed scale. For Byulmi-cheon watershed (1.21 $km^2$) located in the upstream of Gyeongan-cheon, the HSPF (Hydrological Simulation Program-Fortran) and SWAT (Soil and Water Assesment Tool), physically based distributed hydrological models were applied. Before evaluation, the model was calibrated and validated using 9 rainfall events. The Nash-Sutcliffe model efficiency (NSE) for streamflow using the HSPF was 0.62~0.76 and the determination coefficient ($R^2$) for water quality (sediment, total nitrogen T-N, and total phosphorus T-P) were 0.72, 0.62, and 0.63 respectively. The NSE for streamflow using the SWAT were 0.43~0.81 and the $R^2$ for water quality (sediment, T-N, and T-P) were 0.54, 0.87, and 0.64 respectively. From the field experiment of 16 rainfall events, the rice straw cover condition reduced surface runoff average 10.0 % compared to normal surface condition. By handling infiltration capacity (INFILT) in HSPF model, the value of 16.0 mm/hr was found to reduce about 10.0 % reduction of surface runoff. For this condition, the reduction effect of sediment, T-N, and T-P loads were 87.2, 28.5, and 85.1 % respectively. By handling soil hydraulic conductivity (SOL_K) in SWAT model, the value of 111.2 mm/hr was found to reduce about 10.0 point reduction of surface runoff. For this condition, the reduction effect of sediment, T-N, and T-P loads were 80.0, 83.2, and 78.7 % respectively. The rice straw surface covering was effective for removing surface runoff dependent loads such as sediment and T-P.

• 설비공학논문집
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• 제14권11호
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• pp.981-988
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• 2002

Generally, the term "energy saving is economical" is appropriate for the national view point and for design and assessment of one system, but not appropriate when choosing the system by comparing alternative systems in the early design step. Sometimes, non-energy saving system is more economical than energy saving system because of the price of electricity, gas or oil, which are used for operating the air conditioning system. Therefore, when designing the system, we should consider the efficient alternatives through economic assessment of energy saving method. However, research on non-operating number control of the system is not sufficient because it is more common to use operating number control of the system for most economic assessment of air conditioning system. For this reason, this research can provide the economics through operating number control as basic design data. The data obtained through assesment of Life Cycle Cost based on amount of yearly energy use, were produced by system simulation of HASP/ACLD/8501 and HASP/ACSS/8502 for six alternative heating/cooling systems based on constant air volume conditioning system, which is widely used for medium and large office buildings in Busan.

• Korean Journal of Health Education and Promotion
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• 제3권1호
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• pp.71-81
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• 2001

This study was administered to analyze important needs for the health education among Chinese, Korean-Chinese adolescents in Gilin, China and Korean adolescents in Seoul, Korea. The data were collected from 400 chinese and 200 Korean-Chinese boys and girls of 3 high schools in Gilin, China and 396 boys and girls of 3 high schools in Seoul, Korea. The results were as follow: 1. The prevalence of smoking and drinking in Korean students was quite high among three groups. More than one third of Korean students had behaviors of smoking and drinking. Forty two point five percent of Korean students were sick during the past 4 weeks, but only 10.8% of Korean-Chinese students and 11.5% of Chinese students were sick during the past 4 weeks. More than 70% of Chinese and Korean-Chinese students had health concern, but only 22.7% of Korean students were interested in health status and education. 2. Korean-Chinese and Chinese students had higher health education needs than the Korean students. They were not interested in sex education. On the other hand, Korean students were interested in mental health and health habits. 3. Korean-Chinese students had more health education needs than Chinese or Korean adolescents and the difference was statistically significant (p<0.05). 4. For the Chinese and Korean-Chinese students, the higher prevalence of drinking behavior, the higher needs of health education, and the difference was statistically significant (p<0.05). 5. The Chinese students tended to need health education after their illness experience, but the Korean students, the higher the self- rating health status, the higher health education need scores were(p<0.05).

• 대한한의학회지
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• 제20권2호
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• pp.200-207
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• 1999

Herniation of intervertevral disc(HIVD) is the most common disease causing low back pain. Acupuncture, electroacupuncture and moxibustion has been used for treatment of HIVD. Bee venom (BV) also has been traditionally applied to relieve pain. Recently, it has been reported that BV is effective in treating HIVD. But more objective methods were required to assess the efficacy of BV on HlVD. So we assessed of BV-acupuncture effect on herniated disc patients by use of rating scale for low back pain. We researched 22 patients who were treated at Department of Acupuncture & Moxibustion, Kyung Hee Medical Center from January 1999 to June 1999. The patients were diagnosed by MRI as having a herniated disc. The results of treatment using rating scale for low back pain in HIVD showed that $43.77{\pm}14.39$ point of pre-treatment score and $84.5{\pm}3.97$ point post-treatment score. The improvement index showed $0.43{\pm}0.15$. Especially, clinical score of neurologic deficits showed most highest improvement index of $0.7{\pm}0.45$. Assessment of BV-acupuncture Effect by MRI finding were showed that protruded disc and extruded disc got more higher improvement index than bulging disc. Among 22 patients, satisfactory assessment of BV-acupuncture effect showed that 15(68.2%) were excellent, and 7(31.8%) were good. The result suggest that BV-acupuncture is good method for treatment of HIVD.

• 한국화재소방학회논문지
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• 제31권6호
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• pp.1-7
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• 2017

현재 국내에서 유통되고 있는 위험물질 가운데 인화성액체가 차지하는 비중은 87 wt% 이상이며 그 중 사용량이, 가장 많은 혼합위험물은 페인트 제품인 것으로 나타났다. 따라서 페인트 제품의 제조, 저장 및 운송에 대한 안전성 확보는 가장 시급하고 중요한 문제라고 할 수 있다. 본 연구에서는 국내 위험물안전관리법과 국제 GHS 시험방법 등을 조사 분석하였고 다양한 유성페인트에 대한 위험성 시험을 실시하여, 그 결과들 간의 연관성을 찾아냈으며, 더 나아가 국내 실정에 맞는 위험성 시험방법 및 판정기준을 제시하였다. 페인트는 인화점 시험, 가연성 액체량과 UN-연소지속성 시험 결과의 판정에 따라 위험물 또는 비위험물로 판정한다. 각각의 다른 수지가 사용되는 6종 유성페인트에 대하여 시험결과 그들은 고위험성을 갖는 제 류 위험물 및 제 류 위험물인 것으로 밝혀졌다.

• 한국물환경학회지
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• 제31권3호
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• pp.295-303
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• 2015

In Korea, Total Maximum Daily Loads(TMDLs) has been enforced to restore and manage water quality in the watersheds. However, some assesment of implementation plan of TMDLs showed that the achievement of the target water quality is not related to the proper allocation loads because difference of flow duration interval. In the United States, the discharge loads are determined by water quality modeling considering standard flow conditions according to purpose. Therefore, this study tried to develop the allocation method considering economical efficiency using water quality model. For this purpose, several allocation methods being used in the management of TMDLs is investigated and develope an allocation criteria considering regional equality and uniformity. Since WARMF(Watershed Analysis Risk Management Framework) model can simulate the time varying behavior of a system and the various water quality variables, it was selected for a decision support system in this study. This model showed fairly good performance by adequately simulating observed discharge and water quality in Miho watershed. Furthermore, the scenario simulation results showed that the effect of annual average water quality improvement to remove 1kg BOD is more than 25 times, even if point pollutants treatment facility is six times more expensive to operate than non-point pollutants treatment facility.

• 한국환경생태학회지
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• 제21권5호
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• pp.442-448
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• 2007

본 연구는 샛강 기슭 훼손부의 물리적, 생태적 안정화를 도모하고자 돌망태틀놓기공법 및 버드나무울짱얽기공법을 시공한 구간에서 생태환경 개선 효과를 검증하기 위하여 수행되었다. 샛강의 생태적 건강도 평가를 위해 규조군집의 종풍부도, 종다양도지수, 수질오염도지수, 오염 민감종의 구성비, Achnanthes minutissima의 구성비, 우점도지수의 6개 메트릭을 활용하였다. 구간 상류의 유입부(ST. 1)와 구간 내 지점(ST. 2) 및 하류 유출부(ST. 3)를 대상으로 6개 메트릭의 변화값을 종합하면 평균 33.9%의 높은 생태환경 개선 효과를 확인할 수 있었다. 이 결과는 본 조사에서 적용된 샛강의 생태공학적 안정화기술이 하천의 생태학적 건강도를 보존하는 데 있어 효과적임을 시사해주는 것으로 평가할 수 있었다.

• 한국비블리아학회지
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• 제24권3호
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• pp.135-156
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• 2013

최근 들어, 고등교육기관으로서의 대학은 교육성과와 품질을 보장해야 할 사회적 책무성에 직면해 있다. 대학평가인증제도는 대학교육의 책무성을 담보하기 위한 수단으로써 국제적으로 널리 이용되고 있다. 미국의 대학평가인증기준은 물적, 인적자원 등 투입요소 대신에 문제해결능력, 비판적 분석력, 창의력과 같은 학습성과를 강조하고 있다. 또한, 미국의 대학평가인증기준은 정보활용능력을 주요 학습성과로 간주하고 있다. 본 연구는 도서관 및 정보활용능력의 관점에서 한국과 미국의 대학평가인증기준을 비교 분석하고, 한국의 대학평가인증기준에 정보활용능력에 관한 사항을 어떻게 적용해야 할 것인가 하는 기본 방향을 제시하는데 목적이 있다. 한국의 대학평가인증기준은 학습성과를 강화하는 측면에서 정보활용능력을 반영하고, 단순 강의 수준을 벗어나 도서관 사서와 담당교수와의 협력수업을 기준에 반영할 필요가 있다.