• 생물환경조절학회지
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• 제19권4호
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• pp.240-245
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• 2010

절화장미의 새로운 수경재배 방식으로 용기재배를 제시하기 위하여 배수구의 높이와 적정 배지를 설정하는 두가지 시험을 수행하였다. 용기재배 시 적정한 배수구 높이를 설정하기 위하여 규격이 $30{\times}30{\times}25cm$인 사각용기에 배수구를 0, 3, 6, 9cm 높이로 처리하였을 때 수량은 3cm 배수구 처리가 많았으나 절화품질은 처리간 차이가 발생하지 않았다. 정식후 생존율은 각각 100, 100, 92, 92%였다. 배수구 높이와 배지조성의 관계를 구명하기 위하여 배수구 높아가 0, 3cm인 용기에 배지을 코이어와 펄라이트 단용 및 혼용하여 7가지 배지를 조성하였다. 수분센서를 이용하여 수분함량이 -5kPa에 도달했을 때 급액을 했을 때 코이어 혼합비율이 높은 배지와 3cm 배수구 높이 처리가 급액횟수가 감소하였다. 화중을 제외한 절화의 상품성과 2차 수확까지의 절화 수량은 배수구의 높이에 따른 차이는 인정되지 않았고 3차 수확이후의 수량은 3cm 배수구 처리가 많았다. 배지별로는 코이어의 혼합 비율이 높은 처리에서 수량과 상품성이 우수하였다. 수량은 배수구를 높인 처리구가 절화품질과 수량이 많았으며, 펄라이트의 혼합비율이 높은 배지에서 수량이 감소하는 경향을 나타내었다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 춘계학술대회논문집
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• pp.165-171
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• 2000

The study about a drainpipe of water closet was performed as reduction plan on drainage noise for water closet, which of noise in plumbing systems was being indicated the major point at issue in apartment houses. A drainpipe of water closet is divided into a sleeve, a joint elbow and a traversing pipe, through the result of experiment, for an effective noise reduction in a drainpipe a threefold joint elbow is proposed among parts. And through the experiment of performance with glasswool, the removal of glasswool should be in the economical efficiency aspect.

• Tribology and Lubricants
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• 제22권4호
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• pp.225-229
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• 2006

The issue with the drainpipe now a day is that they are laid underground. Causing us to perform additional work to repair, such as digging up the ground and peeling off the insulator that surrounds the pipe. And such series works are difficult that concession appears from government and municipal office. However, if we can save time and money. Performance of piping robot that we are studied in existing session through fixing unit and improvement of cutting bit shorten and wished to heighten work efficiency. And we are trying to develop a unit that can cut up the projecting parts which connects with the interior part of the drainpipes.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2003년도 춘계학술대회 논문집
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• pp.143-148
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• 2003

The issue with the drainpipe now a day is that they are laid underground. Causing us to perform additional work to repair, such as digging up the ground and peeling off the insulator that surrounds the pipe. And such series works are difficult that concession appears from government and municipal office. However, if we can save time and money. Performance of piping robot that we are studied in existing session through fixing unit and improvement of cutting byte shorten and wished to heighten work efficiency. This is why we are trying to develop a unit that can cut up the projecting parts which connects with the interior part of the drainpipes.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2008년도 추계학술발표대회
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• pp.269-270
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• 2008

In this paper, we discuss the design of an urban drainpipe system based on Geographic Information System (GIS). First we introduce the reasons why we establish this system, and then analyzed the construction, database architecture, network architecture of the system, at last we give a develop direction in the future.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1166-1169
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• 2003

The issue with the drainpipe now a day is that they are laid underground Causing us to perform additional work to repair, such as digging up the ground and peeling off the insulator that surrounds the pipe. And such series works are difficult that concession appears from government and municipal office. However, if we can save time and money. Performance of piping robot that we are studied in existing session through fixing unit and improvement of cutting byte shorten and wished to heighten work efficiency. This is why we aye trying to develop a unit that can cut up the projecting parts which connects with the interior part of the drainpipes.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2001년도 추계학술대회논문집 I
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• pp.120-126
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• 2001

The study was performed as reduction plan on drainage noise in a toilet, which of noise in plumbing systems was being indicated the major point at issue in apartment houses. The reduction plan is four items, which are water closet, isolating system for the base of water closet, low noise drainpipe, and a ceiling tex. Through the result of experiment, it was showed that noise reduction is about 9dB(A) within a toilet and above 5dB(A) in a bedroom.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2001년도 춘계학술대회논문집
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• pp.881-885
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• 2001

The study about a drainpipe of water closet was performed as reduction of drainage noise for water closet. The Drainage noise is composed two characteristics. One is Low frequency noise and the other is high frequency noise. Low frequency noise is dominant in the first stage and high frequency noise is dominant in the last stage. This is due to water splashing and that is caused by formation of chamber pot. In this experiment, for the purpose for reducing the noise, we choose the hollow rubber pipe element. As a result, we reduced drainage noise about 11㏈A.

• 설비공학논문집
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• 제17권5호
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• pp.452-458
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• 2005

In Korea, pumping pipe using gravity way by water is most popular method in drainage system. But, it is difficult to repair a drainpipe in this method because the drain pipe diameter is increased as using this method. In this research, we propose a new drainage system. The system aim for an adaptedness with buildings, freedom of plan, construction and renewal in water pipe equipments, etc. The new system is not need of incline of piping, and it uses drainage power that is changed potential energy by high velocity flow as making Siphonage at vertical pipe. Therefore, the diameter of piping can decreased than existing piping system established in the ceiling. Also because connecting position will be located at the lower part, it is changed the potential energy of drainage to the high velocity flow. In addition, drainage will be smooth because the fixture drain is linked by each drain pipes.

• 설비공학논문집
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• 제19권11호
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• pp.789-796
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• 2007

It has been noted, in case of the apartments in collective form, the drainage noise from cleaning of toilet causes many problems in the basement and adjacent rooms, mainly hampering the pleasant housing environment. The problems are increasingly raised by civil complaints with the public offices. Therefore, if the drainage noise generates when wash out of toilet bowl is grasped how the characteristics change according to the sorts of drainpipe, it is considered that the establishment of an effective sound insulation countermeasure could be possible when a civil petition against the drainage noise of apartment house is submitted hereafter. On such viewpoint, this study measured and analyzed the characteristics of drainage noise per the type of drainage pipe, according to KS A ISO $1996-1{\sim}3$, with the horizontal branch pipe and riser pipes in the drainage noise experiment chamber which has the characteristics of the anechoic room. In the result, the pipe type with excellent noise reduction function. The result of this study is considered to become available as fundamental data, to take actions on reduction of drainage noise of the ceiling piping method.