• 한국철도학회논문집
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• 제20권4호
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• pp.474-481
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• 2017

국내에서 태양광 발전설비 설계 시 설계 단계에서의 태양광발전소의 발전량 예측은 국내 현장임에도 불구하고 PVsyst, PVWatts 등 해외 발전량 예측 프로그램과 해외 기상 자료를 이용하여 발전량을 예측하는 경우가 대부분을 차지하고 있는 실정이다. 본 논문에서는 기상정보를 활용한 발전량 예측 비교 연구를 위하여 현재 운영중인 2개 지역의 국내 태양광발전소를 대상지로 선정하였다. 발전량 예측 프로그램인 PVsyst를 활용하여 Meteonorm 7.1과 NASA-SSE의 해외 기상정보를 이용한 발전량 예측값과 국내 기상청 (Korea Meteorology Administration) 기상정보를 활용한 발전량 예측 정확성을 비교하였다. 추가적으로, 기상자료 비교 분석을 통한 발전량 예측 개선 방안을 연구하고, 최종적으로 실제 발전량과의 비교 분석을 통해 기후요소가 고려된 태양광 발전량 예측 수정 모델을 제시하였다.

• International Journal of Human Ecology
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• 제16권2호
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• pp.33-44
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• 2015

Malaysian modern housing typologies (such as bungalows, semi-detached houses and terrace houses) are influenced by international style and constitute unique regional characteristics because they are modified in accordance with climatic conditions and unique social, ethnic housing cultures. This research identified unique characteristics and planning principles of how rooms and spaces of a house are related and organized into coherent patterns of form and space. For the analysis, we surveyed twenty-two residential precincts that identified twenty-five unit plan types for landed properties built in Ara Damansara, Malaysia. The methodology adopted in this study consisted of a document review and field surveys. It is difficult to find unique characteristics of space organization (except for the location of bathrooms) because the form of terrace houses is standardized and limited in design from the aspect of space organization. However, the organization of bedroom space and kitchen space has strong regional characteristics that have become stereotyped for semi-Ds and bungalows. General guideline for areas of unit plans are proposed based on the results of area analysis. We also found that the areas of L + D and MB increase as the total area of the house increases; however, the remaining rooms do not increase in area as long as they satisfy appropriate standards due to the addition of multi-purpose extra rooms. This study only examined limited cases in Ara Damansara and it is difficult to generalize the findings of other new towns in Malaysia. Nevertheless, it is worthwhile to collect and systematically organize data according to typologies. Finally, the authors were able to understand the unique regional design factors to be considered for landed property housing planning in Malaysia.

• 한국의류산업학회지
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• 제1권1호
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• pp.12-17
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• 1999

The actual clothing conditions were surveyed to diagnose clothing condition of collegians in the view point of adaptation to the thermal environment in fall. Then, clothing climate, physiological responses, and subjective sensation were investigated through wearing trials on human subjects in climatic chamber based on the results from the survey. Factors to evaluate validity of clothing condition were clothing weight, clothing climate, physiological responses of human body, and subjective sensation. Adaptability of this research to thermal environment was compared to the results of Toda's and Duno's of Japan, Chung's results of Korea rural area, and Winslow's clo value. The standard values for wearing trials were values at comfortable zone, such as $32{\pm}1^{\circ}C$ of temperature and $50{\pm}10%$ of humidity inside clothing, $36.5{\sim}37.3^{\circ}C$ of ear temperature and $32.2{\sim}34.3^{\circ}C$ of mean skin temperature. Clothing weight per body surface area was 680.9 $g/m^2$ in male and 526.7 $g/m^2$ in women. Cold resistance ability of collegians was superior to Japanese and American, and similar to rural male in Korea. According to the examination of clothing adaptability with clothing weight from the investigation on physiological responses and the actual clothing conditions survey, following were found. Temperature inside clothing ($29.8{\sim}32.3^{\circ}C$) was normal, and humidity inside clothing (32.2~54.8%) was at comfortable zone. Mean skin temperature was at its comfortable zone. Therefore, 615 $g/m^2$ in male and 525 $g/m^2$ in female were a desirable wearing condition.

• Journal of Plant Biology
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• 제12권1호
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• pp.7-14
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• 1969

Korea has a lots of margin for security of farm land from her coastal region. The area of saline soil may be reached about 10% of present farm land if the reclamation works are finished. This paper was conducted as a part of studying the possibilities of desalination of saline soil through the experiment of some halophytes. The halophytes in this works were Salicornia herbacea L., Suaeda glauca Bunge, chenopodium acuminatum Willd, and Scirpus triquerter L. Of the above halophytes, Salicornia was proved the most effective plant for desalination of saline soil referring to the following results; 1) The seasonal uptake of chloride by Salicornia was the highest of all. However, the general tendencies of all plants showed a decrease on August. 2) Salinity of soil showed the lowest value on the site where Salicornia was grwon densely. Comparing the other sites grouped by age of saline soil with the above site, the salinity of rice-paddy (10 years after reclamation) is similar to those of the site wehre Salicornia were as well as the 50 cm below the surface soil. 3) The maximum water holding capacity of surface soil appeared in the site of Salicornia, but in 50 cm below the surface, the maximum water holding capacity are almost on equat terms having no connection with the age of saline soil. Soil pH, other chemical compositions such as organic matter, magnesium, potassium, phosphorous, and nitrate were determined to elucidate the relationship between the changes of soil properties and chemical uptakes by certain halophytes. It is assumed that the above chemical compositions are frequently affected by the factors such as coastal circulation of salts, exchangeable base, microbial growth, climatic conditions, and irrigation of water.

• 농업과학연구
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• 제47권2호
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• pp.381-394
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• 2020

Accelerated soil wind erosion still remains to date to cause severe economic and environmental impacts. Revised and updated models to quantitatively evaluate wind induced soil erosion have been made for specific factors in the wind erosion equation (WEQ) framework. Because of increasing quantities of accumulated data, the WEQ, the revised wind erosion equation (RWEQ), the wind erosion prediction system (WEPS), and other soil wind erosion models have been established. These soil wind erosion models provide essential knowledge about where and when wind erosion occurs although naturally, they are less accurate than the field-scale. The WEQ was a good empirical model for comparing the effects of various management practices on potential erosion before the RWEQ and the WEPS showed more realistic estimates of erosion using easily measured local soil and climatic variables as inputs. The significant relationship between the observed and predicted transport capacity and soil loss makes the RWEQ a suitable tool for a large scale prediction of the wind erosion potential. WEPS developed to replace the empirical WEQ can calculate soil loss on a daily basis, provide capability to handle nonuniform areas, and obtain predictions for specific areas of interest. However, the challenge of precisely estimating wind erosion at a specific regional scale still remains to date.

• 한국지반공학회논문집
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• 제18권5호
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• pp.67-72
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• 2002

포장내의 흙들의 함수비는 강우, 온도 등의 기후적 요인에 따라 계절적으로 변화한다. 그것은 강우로인한 동수경사가 습기의 흐름을 유발하고, 온도변화로 인한 온도경사가 직.간접적으로 열흐름뿐만아니라 습기의 흐름을 유발하기 때문이다. 포장내의 흙들은 보통 불포화상태로 존재한다. 그리고 열의 흐름과 습기의 흐름은 상호간에 복잡한 작용을 하는 복합적인 과정들로 인식되어 왔다. 이 논문은 불포화토내의 복합적인 열의 흐름과 습기의 흐름에 대해 유한요소법을 이용한 하나의 일차원적 분석모델을 제시한다. 이 모델은 온도와 함수비 변화뿐만아니라 시간에 따른 동상을 예측하기 위하여 사용될 수 있다. 온도 및 함수비의 변화 그리고 동상의 예측은 포장의 설계 및 유지관리를 위해 의미 있는 일이 될 것이다. 이 모델은 다른 모델의 결과들과 비교를 통해서 검증된다.

• 한국지반환경공학회 논문집
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• 제17권5호
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• pp.17-25
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• 2016

지표에 노출되는 암석은 기상작용 등의 영향으로 풍화가 가속되며, 풍화작용은 광물의 성질을 변화시켜 암석의 안정성을 저하시키게 되므로 암석의 풍화에 대한 저항은 광물의 조성을 파악하는 것이 중요하며 이는 풍화 민감도 분석을 통해 이루어진다. 따라서 본 연구에서는 시추된 시료에 대한 현미경 박편 시험을 실시하고 모드분석을 통해 풍화 취약광물의 구성비를 측정하였으며, 이를 통해 대상사면의 암석학적 광물학적 풍화요인을 평가하였다. 또한, X-Ray 회절분석을 이용하여 암석을 구성하는 실제적인 광물조성을 정량적으로 측정하고 주사현미경관찰을 통해 이차광물을 동정하여 풍화의 진행 정도를 파악하였다. 이러한 풍화 민감도 기법을 통하여 풍화 저항도를 판단할 수 있는 적절한 지시자를 결정할 수 있으며 화학적 풍화속도를 이용한 풍화등급의 예측이 가능할 것으로 분석되었다.

• 한국지리정보학회지
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• 제12권4호
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• pp.59-73
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• 2009

본 연구에서는 국내 산사태 발생이력 자료을 기반으로 GIS 기법을 적용하여 산사태 위험도 분석을 수행하였다. 이를 위해 한국도로공사에서 조사한 3년 동안의 총 596개 산사태 발생이력 자료와 산사태 발생요인 정보(기상정보, 지형정보, 토질정보)를 기초로 산사태 발생과 발생요인 간의 통계적 분석을 수행하여 상관관계를 산출하였다. 그 후 산출된 상관관계 토대로 총 6개의 래스터 래이어에 대한 가중치 및 위험도 인덱스를 도출하고, 최종적으로는 가중치를 적용한 래스터 계산기법을 통해 산사태 위험지도를 작성하였다. 본 연구의 적용 결과 산사태 위험도 산출을 위해 GIS 기법을 적용할 경우, 산사태 위험지도 작성을 위한 다양한 발생요인의 통합과 분석을 보다 손쉽고, 효율적으로 수행할 수 있을 것으로 판단되었다.

• 농업생명과학연구
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• 제44권5호
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• pp.35-43
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• 2010

백두대간의 마루금일대에 자라는 소나무 연륜생장과 기후와의 관계를 알아보기 위하여 21개 지역에서 48본 시료의 연륜을 분석하였다. 모든 지역의 소나무 연륜패턴이 서로 크로스데이팅 되어 우리나라 소나무의 생장이 기후에 크게 영향을 받는다는 것을 알 수 있었다. 이들 연륜연대기는 3개의 군집으로 구분할 수 있었는데, 지역적으로 그리고 해발 고도에 따라 분류되지 않아 백두대간에 분포하는 소나무의 연륜생장은 지역이나 고도보다는 미소 (microsite) 생육환경에 따른 생장량의 대소에 따라 분류되는 것을 알 수 있었다. 백두대간 소나무의 연륜생장과 기후(월 강수량과 월 평균기온)와의 관계를 상관계수로 분석한 결과, 백두대간 소나무의 연륜생장은 강수보다는 기온에 영향을 많이 받으며, 생장이 양호한 군집이 기후의 영향을 덜 받는 것으로 나타났다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2018년도 학술발표회
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• pp.154-154
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• 2018

To interpret the climate projections for the future as well as present, recognition of the consequences of the climate internal variability and quantification its uncertainty play a vital role. The Korean Peninsula belongs to the Far East Asian Monsoon region and its rainfall characteristics are very complex from time and space perspective. Its internal variability is expected to be large, but this variability has not been completely investigated to date especially using models of high temporal resolutions. Due to coarse spatial and temporal resolutions of General Circulation Models (GCM) projections, several studies adopted dynamic and statistical downscaling approaches to infer meterological forcing from climate change projections at local spatial scales and fine temporal resolutions. In this study, stochastic downscaling methodology was adopted to downscale daily GCM resolutions to hourly time scale using an hourly weather generator, the Advanced WEather GENerator (AWE-GEN). After extracting factors of change from the GCM realizations, these were applied to the climatic statistics inferred from historical observations to re-evaluate parameters of the weather generator. The re-parameterized generator yields hourly time series which can be considered to be representative of future climate conditions. Further, 30 ensemble members of hourly precipitation were generated for each selected station to quantify uncertainty. Spatial map was generated to visualize as separated zones formed through K-means cluster algorithm which region is more inconsistent as compared to the climatological norm or in which region the probability of occurrence of the extremes event is high. The results showed that the stations located near the coastal regions are more uncertain as compared to inland regions. Such information will be ultimately helpful for planning future adaptation and mitigation measures against extreme events.