• 보존과학회지
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• 제25권2호
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• pp.179-196
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• 2009

논산 개태사지석불입상(보물 제219호)은 담회색을 띠고 부분적으로 장석 반정을 함유하고 있는 중립 내지 조립질의 화강섬록암으로 구성되어 있다. 구성암석의 전암대자율은 평균 12.06(${\times}10^{-3}$ SI unit)으로 개태사지 배후의 천호산 ($0.19{\times}10^{-3}$ SI unit) 노두와는 많은 차이를 보이고 있어 석재의 외부 유입 가능성이 제기된다. 이 석불입상은 우협시불의 박리(35.2%), 본존불의 시멘트 보수물질(21.1%) 및 먼지(25.0%)가 주요한 손상현상으로 밝혀졌다. 초음파 속도는 본존불 2850.2m/s, 좌협시불 2648.4m/s, 우협시불 2644.5m/s로 측정되었다. 이를 통해 산정한 일축압축강도는 우협시불이, 부위별로는 대좌에서 상대적으로 낮은 강도를 나타내어 손상도 평가 결과와 일치하였다. 석불입상이 봉안된 보호각 내부의 연평균 기온은 $13.7^{\circ}C$, 상대습도는 79.0%로, 계절에 따른 보호각 내부의 환경 변화는 근본적으로 외부의 변화를 따르나 미기후 변동이 심하지 않아 비교적 안정된 실내 환경이 유지되고 있다. 석불입상의 대좌 표면에서는 봄과 여름철에 결로가 발생하는 것으로 확인되었으며, 겨울철에는 동결파괴가 우려된다. 이는 훼손도 평가와 초음파 탐사 결과에서 나타난 대좌의 풍화 및 강도 저하의 근본적인 요인일 가능성이 매우 크다. 따라서 봄과 여름철에 집중 강우 시 실내의 제습과 한겨울에 기온 강하를 저감시킬 수 있는 조치가 필요하다.

• 한국사회복지학
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• 제47권
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• pp.107-147
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• 2001

In the 1990s, with enacting of the laws on the family violence in Korea, agencies such as helpline 1366, counseling center and shelter for the female victims have been rapidly increasing in number. Also police and medical center have been viewed as having major responsibility for delivering services and social workers in community welfare center and public social worker have been expected play a role in community-based delivery systems for the female victims. The purpose of this study is to measure the level of the inter agency coordination and to find out the factors affecting the inter-agency coordination in family violence and to make policy implications for a better delivery system. The data were obtained from a social survey of family violence agencies, counselling center/shelter/helpline 1366, police, medical center, social workers of community center and of public sector in Seoul and Kyeongi area. The major results are as follows: 1) the level of inter-agency coordination is low, specially the referal cases of police and medical center is very poor. 2) The type of inter-agency coordination is referals and information sharing among agencies. 3) the factors affecting inter-agency coordination is agency type, wills and efforts of agency, information sharing, experience of family violence education. The current findings suggest that the delivery system to promote inter-agency coordination efforts and for police and medical center, social worker in private and public agency to respond promptly and properly would be built up.

• 한국태양에너지학회 논문집
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• 제31권5호
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• pp.77-84
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• 2011

Korea and some other countries located in the northern hemisphere employ the air conditioner for the space cooling in the hot summer season and also some kinds of heaters for the space heating in the cold winter season. Especially in Korea, a great number of air conditioners of about 12,700,000 sets have been used these days. However, they are used for a short operation period of only 58 days a year, which results in the material and economic losses. To solve this problem and employ this system for the emergency shelter, a new conversion unit which could convert the existing air conditioner to a heat pump system for simultaneous heating and cooling was developed in this study, and the thermal performance was tested. The results indicated that the indoor air could be heated from $27^{\circ}C$ to $39^{\circ}C$ by the air conditioner converted to a heat pump system with the ambient temperature variation of $-10^{\circ}C{\sim}10^{\circ}C$, and cooled from $20^{\circ}C$ to $15^{\circ}C$ by the converted system with the ambient temperature variation of $20^{\circ}C{\sim}35^{\circ}C$. And also the heating COP increased from 3.3 to 5.3 in case of the heat exchange of the super cooling(HESC) circuit and from 3.0 to 4.0 in case of the By-pass with the ambient temperature variation of $-10^{\circ}C{\sim}10^{\circ}C$, respectively, whereas the cooling COP decreased from 3.1 to 2.1with the increase of the ambient temperature from $20^{\circ}C$ to $35^{\circ}C$.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제4권4호
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• pp.135-140
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• 2015

WDSS는 네트워크 연동구간을 이용한 DDoS 대피소 시스템에 L7 스위치와 웹캐시서버를 추가 구성하여 웹 응용계층 DDoS 공격에 대한 방어성능을 향상시킨 시스템이다. WDSS는 웹 DDoS 공격 발생 시 백본 네트워크로부터 트래픽을 우회한 뒤 비정상 요청은 DDoS 차단시스템과 L7 스위치에서 차단하고 정상적인 클라이언트의 요청에 대해서만 웹캐시서버가 응답하게 함으로써 소규모 트래픽 기반의 세션 고갈형 DDoS 공격에 대응하고 정상적인 웹서비스를 유지한다. 또한 정상 트래픽을 웹서버로 재전송하기 위한 IP 터널링 설정이 없이도 공격 대응이 가능하다. 본 논문은 WDSS를 국내 ISP 백본 네트워크상에 구축하여 시스템 작동에 대한 유효성과 웹 응용계층 DDoS 공격 방어성능을 검증한 결과를 다룬다. 웹 DDoS 방어성능 평가는 실제 봇넷과 동일한 공격 종류와 패킷수의 공격을 수행할 수 있는 좀비 PC로 구성한 DDoS 모의테스트 시스템을 이용하여 실시하였다. 웹 응용계층 DDoS 공격 종류와 강도를 달리하여 WDSS의 웹 DDoS 방어성능을 분석한 결과 기존의 DDoS 대피소 시스템에서 탐지/방어하지 못한 소규모 트래픽에 기반하며 동일 플로우를 반복적으로 발생하지 않는 웹 DDoS 공격을 탐지/방어할 수 있었다.

• 대한공간정보학회지
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• 제13권3호
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• pp.41-52
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• 2005

오늘날 도시지역은 인구밀집과 건축물의 고밀화로 인하여 자연재해나 인위적 재난이 발생할 경우 대형사고로 확산될 가능성이 매우 높다. 본 논문에서는 지형공간정보체계를 이용하여 도시지역의 종합적인 재해위험도를 평가하였으며, 이를 위해 도시지역 재해위험도를 침수위험도, 화재위험도, 건물붕괴위험도, 대피위험도 등 4가지로 세분하고 재해위험도를 평가하였다. 이러한 재해위험도 평가결과는 각종 도시관리계획을 수립할 때 재해를 최소화 시킬 수 있는 유효한 자료로 활용될 수 있다. 향 후 본 연구의 체계화와 전문성을 위하여 보다 많은 재해요소를 포함하고 관련분야의 전문가가 참여하는 공동연구 수행이 필요하다고 생각된다.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2004년도 유체기계 연구개발 발표회 논문집
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• pp.321-326
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• 2004

The pressure and differential pressure(DP) transmitters are used for gas flow rate calculation on the orifice gas metering system. On site, the pressure and DP transmitters are installed in a shelter to diminish the affects of environmental change such as an ambient temperature. But there has been an argument about the effectiveness of the shelter and this brought up the necessity to verify the affects of ambient temperature. These experiments were performed to verify the ambient temperature effects as observing the output of transmitters when the ambient temperature were changed from $-30^{\circ}C$ to $50^{\circ}C$. The results showed that the most of transmitters were operated in the spec range of performance criteria presented by manufacturer but the rapid change of ambient temperature could cause the larger measurement error for the DP transmitter of low span than others. Therefore the pressure and DP transmitters need to be operated and controlled within the proper range of ambient temperature.

• Wind and Structures
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• 제29권5호
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• pp.313-321
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• 2019

The wind blowing at high velocity in an open storage yard leads to wind erosion and loss of material. Fence structures can be constructed around the periphery of the storage yard to reduce the erosion. The fence will cause turbulence and recirculation behind it which can be utilized to reduce the wind erosion and loss of material. A properly designed fence system will produce lesser turbulence and longer shelter effect. This paper aims to show the applicability of Support Vector Machine (SVM) to predict the recirculation length. A SVM model was built, trained and tested using the experimental data gathered from the literature. The newly developed model is compared with numerical turbulence model, in particular, modified $k-{\varepsilon}$ model along with the experimental results. From the results, it was observed that the SVM model has a better capability in predicting the recirculation length. The SVM model was able to predict the recirculation length at a lesser time as compared to modified $k-{\varepsilon}$ model. All the results are analyzed in terms of statistical measures, such as root mean square error, correlation coefficient, and scatter index. These examinations demonstrate that SVM has a strong potential as a feasible tool for predicting recirculation length.

• Journal of the Korean Institute of Landscape Architecture International Edition
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• 제2호
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• pp.178-184
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• 2004

The Yatomi - Aioiyama line is a city-planning road that was notified in 1957 and subsequently prepared by land readjustments. Currently, approximately 900m of road pass in the inside of the Aioiyama green area has not been constructed. The surveying briefing session for inhabitants was held in July 1992, the project was authorized by the Ministry of Land, Infrastructure and Transport in September 1993, and the project briefing session for inhabitants was held in September 1993. The site purchase has been completed. At the May 2000 briefing session, inhabitants of the area began voicing dissenting demanding the conservation of the natural environment of this green area. The inspector system serves as the third party, independent of both the administration and the inhabitants. Before finalizing the geometric line form of the road to be constructed, some surveys of animals and plants found along the walking trails carried out intensively in the northern area, which is approximately 50 ha, of the Aioiyama green area. The natural environment inspector submitted a plan for changing the geometric line form of the road decided upon by city planning, and it was approved by the city planning council. If the shelter structure or the retaining wall structure is adopted at the location where large slope faces are produced by excavation or landfill, and if the bridge structure is adopted at the place where stream-lines and walking trails intersect, it leads to a reduction of approximately $40\%$ in the areas for which change is planned. Furthermore, approximately $20\%$ of the area to be changed is restored by returning soil to the roof of the shelter.

• 원예과학기술지
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• 제34권1호
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• pp.15-23
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• 2016

A study was conducted to evaluate the effects of irrigation (amount, interval) on tree growth, fruit quality, and cracking of organic 'Campbell Early' grapevine in 2012 and 2013. Three irrigation treatments were applied using a sprinkler system from mid-June to mid-August in 2012 and 2013, as follows: 10 mm was applied daily (10 mm-IR), 20 mm was applied every two days (20 mm-IR), and 30 mm was applied every five days (30 mm-IR). Soil electrical conductivity (EC) and temperature were found to be greatest in the 10 mm-IR treatment in both years. Soil moisture content ranged between 20-40% in the 10 mm-IR, between 20-60% in the 20 mm-IR, and between 20-70% in the 30 mm-IR treatment plots. The total number of leaves per shoot and shoot growth were found to be greatest in the 20 mm-IR and 30 mm-IR treatments, respectively. Cluster and berry weights, and cluster and berry sizes were not consistently affected by the treatments. The 10 mm-IR treatment resulted in an increase in fruit SSC, SSC/acidity ratio, and berry skin pigmentation ($b^*$; blue). Approximately 5% of fruit cracking was observed on average over both years in the 10 mm-IR-treated fruit, while the 30 mm-IR treatment resulted in nearly 18% of cracking in 2012. Average marketable fruit yield per year over two years was greatest for the 10 mm-IR treatment ($24.4t{\cdot}ha^{-1}$) followed by the 30 mm-IR treatment ($22.7t{\cdot}ha^{-1}$) and lastly the 20 mm-IR treatment ($22.2t{\cdot}ha^{-1}$). Thus, the 10 mm-IR treatment represents a suitable irrigation regimen for controlling leaf and shoot growth of vines grown under a rain-shelter system in sandy loam soils, while improving fruit sugar contents and skin color and limiting fruit cracking.

• 한국정보통신학회논문지
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• 제27권1호
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• pp.117-123
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• 2023

여름철 집중적인 태풍이나 호우로 인해 침수 및 범람으로 인명 피해가 존재한다. 이러한 피해로 인해 제일 큰 재해는 홍수이며 인명 피해를 줄이기 위해 본 논문에서는 Map API를 활용한 최단 거리 알고리즘 기반 보행자 경로 탐색 연구를 제안한다. 본 시스템은 Map API를 비교분석을 통하여 선정하고 최단 경로를 제공한다. 탐색 된 경로는 JSON 형태와 대피소의 데이터를 데이터베이스에 저장한다. 이 데이터를 기반하여 설계 및 구현한 경로 탐색 시스템은 보행자의 위치를 파악하여 돌발 홍수 발생하였을 때 대피 경로를 제공한다. 또 대피 경로로 이동 중 진입하지 못하는 경로일 경우 보행자의 현재 위치를 파악하여 경로 재탐색하여 새로운 경로를 제공한다. 이에 본 논문에서 제안하는 보행자 경로 탐색 시스템은 안전사고에 예방할 것으로 사려된다.