• 월간낙농육우
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• v.17 no.7 s.183
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• pp.102-105
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• 1997

한우를 사육하는데 있어 하절기는 생산활동을 저해하는 환경요인을 제공하고 있으므로 기온, 습도, 일사, 바람, 기압, 공기 및 흡혈곤충의 피해를 최소화 할수 있도록 노력 해야한다. 기온이 높으면 사료섭취향이 떨어지고 파리, 모기 진드기등에 의해 건강상태가 부진해지면 특히 임신우의 경우 일사병과 소화장애를 가져올수 있다. 현재 한우를 사육하고 있는 축사의 구조를 보면 계류식우사, 개방식우사, 지붕개폐식 개방식우사, 단방식우사등 여러형태를 볼수 있으며, 여름

• Feed Journal
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• v.2 no.7
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• pp.90-93
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• 2004

소에 있어서의 하절기 고온다습은 체력의 저하와 평상시에 비해 사료섭취량의 감소로 인한 유량이나 유질 등의 우유생산성, 분만 후 생식기의 회복이 지연되어 자궁내막염이 많이 발생됨에 따라 번식률이 저하되는 등 나쁜 영향을 미칠 뿐만 아니라 질병발생이 많아지게 한다.<중략>

• Feed Journal
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• v.2 no.7
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• pp.96-99
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• 2004

고온 스트레스를 받고 있는 상황에서 사료 배합비를 조절하거나 급여 방식을 조절하는 것은 젖소에게 고온 스트레스를 극복하는데 도움을 줄 수 있다. 사료배합의 조절은 기온이 올라가기 전에 미리 천천히 조절하여 젖소의 사료섭취량이 줄어드는 것을 막도록 해야한다.<중략>

• Korean Journal of Construction Engineering and Management
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• v.5 no.6 s.22
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• pp.170-178
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• 2004

Public construction companies have strictly followed a rule that they should not work in the wet area such as structural frame for a certain period during the winter season. It is usually known that the non-working period during the winter causes increase of the project duration, and the project cost escalation. Also, it makes negative effects on national economy because it reduces workers income. Therefore, the site work for the structural frame should be performed even during the whiter season. But the site work for the structural frame during that period cannot proceeds in the same way as during other periods, and requires a different method for estimating project duration. Through an analysis of time scheduling mechanism, actual working days are obtained for 1 cycle of typical floors in the structural frame during these periods, and non-working days of 5 years average are calculated based on calendar day using data of 5 years weather forecasts for that season. This study proposes an optimized way of estimating project duration for 1 cycle of typical floors in the structural frame during these periods. This estimating method uses the combined actual working days and non-working days of 5 years' average, and the estimated results are confirmed by being compared with field data. This study is expected to be used in estimating the construction duration of the structural frame during the winter season.

• Korean Journal of Construction Engineering and Management
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• v.7 no.1 s.29
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• pp.148-158
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• 2006

Public construction companies have strictly followed a rule that they should not do the works using water such as concrete pouring for the structural frame for a certain period during the winter season. It is usually known that the designated non-working period during the winter causes increase of the project duration and the project cost escalation. The halted work also makes negative effects on national economy because it reduces worker's income. However, the situation would be a lot better if the work for the structural frame is allowed under some conditions. The structural framework done alone without being followed by finish works gives a lot of stresses on the finish works. In this sense, this study examines how the structural framework performed during the winter season affect on the critical path of the finish works. To accomplish the objective of this research, the subnet for the finish works as well as a master network are prepared along with critical paths for a virtual construction site. Using the prepared networks, simulations are carried out to see the effects described above. This study is expected to be used in estimating the construction duration of high-rise apartment housing when the site work for the structural frame should be performed during this period.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.33 no.4
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• pp.1611-1617
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• 2013

Information about trafficability or the condition of road with regard to its being traveled over by vehicles is one of the most critical factors for roadway operation in winter. Specifically, when traveling on snowy or icy surfaces, the traction force varies per vehicle type including tire types, geometric characteristics of roads, and conditions of road surfaces. In general, front-wheel drive or four-wheel drive vehicles have better traction performance on snowy or icy surface than rear-wheel drive vehicles, and the latter type vehicle causes more serious traffic congestion when there is unexpected snowfall. Thus, traffic information regarding trafficability with respect to vehicle types, geometric characteristics of roadway sections, and roadway surface conditions can provide a foundation to make a decision whether to use the associated roadway sections for roadway operators as well as users. Based on the preceding premise, the objective of this study is to present a methodology for developing a trafficability index with respect to vehicle types, geometric characteristics of roadway sections, and roadway surface conditions.

• Proceedings of the KSRS Conference
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• 2001.03a
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• pp.85-90
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• 2001

대기복사모델인 MODRAN를 이용해 다목적실용위성 2호 탑재체인 Multispectral Camera (MSC)의 총복사량에 대한 계산을 수행하고 그 결과를 분석해 보았다. 모델계산은 4계절 조건을 모의실험하기 위해 1월 15일, 4월 15일, 7월 15일과 10월 15일에 대해 중위고 동절기 및 하절기, 그리고 US 표준대기를 사용했다. 다목적실용위성 2호 궤도 조건과 각 계절에 대한 대표적인 태양천정각 (solar zenith angle)을 이용하였다. 사정거리는 대류권 에어로솔 소광계수 (tropospheric aerosol extinction)에 해당하는 50 km를 사용하고 지표의 알비도는 맑은 날 지구 연평균 값에 해당하는 0.135가 사용되었다. 위 4개월 평균치로써 연평균 총복사량은 MSC 계약서에 명시된 값들과 상당한 차이를 보였고 심지어 파장에 따른 경향조차도 서로 다름을 알 수 있었다. 가시광선 대역에서 근적외선 대역으로 파장이 증가함에 따라 두 값의 차이가 커짐을 보였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.603-604
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• 2017

In this paper, we propose system that automatically controlls greenhouse to make best environment to grow crops. The proposed system is consist of the function to automatically open and close water-roof, control the tublar well of groundwater and remote monitor information of greenhouse.

• Proceedings of the SAREK Conference
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• 2004.11a
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• pp.72-72
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• 2004

• 월간낙농육우
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• v.35 no.11
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• pp.152-156
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• 2015

필자는 동절기 대비 젖소의 번식 성적유지와 효율 개선을 위해 번식관련 사양관리상 중요한 요점을 설명하고자 한다. 대부분의 젖소농가에서 동절기에 임박해서 대비를 하는 경향이 있는데 미리 준비를 하는 것이 젖소의 번식효율 유지와 사양 관리상 발생할 수 있는 문제점을 줄이는 방법이다. 본고에서는 번식우의 생리적 활성화 방법, 자축의 환절기 관리법, 육성우의 번식관리법, 농후사료 및 조사료 급여 요점을 기술하고자 한다.