• KIEAE Journal
• /
• v.12 no.5
• /
• pp.85-92
• /
• 2012

This research was executed to analyze the problems of Korean type of 'Light-weight' Greening that has been applied similarly by the type of 'Intensive Greening,' and to suggest the better way. To achieve this purpose, we compared and analyzed the theory about the definition of Korean type of Roof Greening and the type of Greening of FLL. And we researched documents and fields of 18 sites of Seoul City that applied the type of 'Light-weigh' Greening, and produced improvement issues and directions. To resolve the confusion of the type definition and site application, arising from considering 'weight of greening' as the main viewpoint to classify the type of Greening, we have to change the term 'Light-weight' with more suitable for contents-based definitions. According to a 'Light-weight' Greening field survey, only 5 among 18 sites are suitable for Extensive Greening and the rest sites show the character of Intensive Greening. Korean concept of 'Light-weight' Greening corresponds with the definition of 'Weight of Greening', but has a problem that does not correspond with the viewpoint of 'Maintenance of Greening'. This problem comes from the fact that the surveyed Light-weight(extensive) Greening sites are designed and executed for use. Therefore, Extensive Greening is proper to be applied for sites, excluded from use. 5 sites, determined suitable for Extensive Greening, adopts 'Sedum-herbaceous Planting' or 'Sedum-grasses Planting' forms of Greening, based on Sedum. So, it has to precede with selecting and breeding plants for developing various forms of Greening, suitable for Extensive Greening including 'Grasses-herbaceous Planting.'

• Journal of the Korean GEO-environmental Society
• /
• v.4 no.1
• /
• pp.11-17
• /
• 2003

The existing geotextile reinforced soil wall methods have a demerit in terms of esthetic view because concrete panel or block are used as wall facing of the methods. If grass planting walls could be used in reinforced soil slope or wall methods, efficiency of the methods would be increased with maximization of advantage of the methods. In this study, some possible methods in which grass planting wall is used as wall facing are devised. A series of laboratory model tests were performed to investigate the behavior of newly devised methods in order to compare with the results of each others. As a major result, it was found that this kinds of grass wall facing methods could be accepted as a new construction method even in the sense of stability.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2015.05a
• /
• pp.449-449
• /
• 2015

최근 비정상성을 띄는 강우 사상으로 인해 도심지에서는 유출량이 증가하여 많은 피해를 보이고 있다. 이를 해결하기 위해 투수성 포장재, 옥상 녹화, 침투 트렌치, 빗물 정원 등의 연구가 활발히 진행되고 있다. 하지만 이를 유역에 속해 있는 전체 도심지에 적용하기에는 많은 자원이 소비된다. 이에 본 연구는 서울시의 청계천 유역을 대상으로 강우유출 모형인 SWMM을 이용하여 소유역 별로 투수성 포장재와 옥상 녹화 사업을 적용하여 유출저감 효과를 분석하였다. 적용된 강우는 강우강도에 따라 각 시설들이 갖는 한계점을 분석하기 위해 서울(108) 지점을 기준으로 재현기간 80년, 지속기간 24시간에 대해 초과확률 50%에 해당하는 Huff 3분위를 채택하였고, 투수성 포장재와 옥상녹화는 서로 적용 위치가 달라 두 가지 사업의 조합을 통해 각각의 효과를 분석하였다. 또한 사업 우선순위를 위해 소유역별 사회, 환경적인 자료를 취합하여 우선순위화 하였다. 이를 통해 한정된 자원 내에서 최적의 개발 지역을 선정하여 최대한의 효과를 도모하고자 한다.

• Journal of Convergence for Information Technology
• /
• v.9 no.3
• /
• pp.30-35
• /
• 2019

An unattended recording system based on smartphone based image image tracking is rapidly developing. Among the existing products, a system that automatically tracks and rotates the object to be photographed using an infrared signal is very expensive for general users. Therefore, this paper proposes a mobile unattended recording system that enables automatic recording by anyone who uses a smartphone. The system consists of a commercial mobile camera, a servomotor that moves the camera from side to side, a microcontroller to control the motor, and a commercial wireless Bluetooth Earset for video audio input. In this paper, we designed a system that enables unattended recording through image tracking using smartphone.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.19 no.4
• /
• pp.1-6
• /
• 2019

CCTV video recording system is recognized as evidence value of video data, and is widely used in real life for the purpose of security of facilities or security control, and it is developing in order to process high-resolution and high-capacity data in real time through network. However, there is no description of redundancy to prevent the loss of image data due to defects of unexpected equipment or external attack, and even if the redundancy is implemented, a high-capacity video stream is transmitted through the network, network overload can not avoided. In this paper, we propose and verify a failover method based on rules that can operate the redundancy scheme without inducing network overload in CCTV network video recording environment.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.40 no.6
• /
• pp.190-197
• /
• 2012

The purpose of this study was to evaluate thermal environment and heat budget of light thin layer green roof through an experiment in order to quantify its heat budget. Two concrete model boxes($1.2m(W){\times}1.2m(D){\times}1.0m(H)$) were constructed: One experiment box with Zoysia japonica planted on substrate depth of 10cm and one control box without any plant. Between June 6th and 7th, 2012, outside climatic conditions(air temperature, relative humidity, wind direction, wind speed), evapotranspiration, surface and ceiling temperature, heat flux, and heat budget of the boxes were measured. Daily maximum temperature of those two days was $29.4^{\circ}C$ and $30^{\circ}C$, and daily evapotranspiration was $2,686.1g/m^2$ and $3,312.8g/m^2$, respectively. It was found that evapotranspiration increased as the quantity of solar radiation increased. A surface and ceiling temperature of those two boxes was compared when outside air temperature was the greatest. and control box showed a greater temperature in both cases. Thus it was found that green roof was effective in reducing temperature. As results of heat budget analysis, heat budget of a green roof showed a greater proportion of net radiation and latent heat while heat budget of the control box showed a greater proportion of sensible heat and conduction heat. The significance of this study was to analyze heat budget of green roof temperature reduction. As substrate depth and types, species and seasonal changes may have influences on temperature reduction of green roof, further study is necessary.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.42 no.5
• /
• pp.88-100
• /
• 2014

The purpose of the study is to analyze the regional effectiveness of wall-plantings by applying a biotope area ratio when wall-plantings are constructed in high density areas. For this, this study required a sample of the wall-planting's regional plan. Therefore, types of wall-planting were determined and applied to a sample site. Four types of wall-plantings were developed by formative features and functional features. Type "A" had simple and functional features, Type "B" had both mixed and functional features, Type "C" had both simple and landscape features and Type "D" had mixed and landscape features. Jung-gu District in Seoul was chosen as the sample site. Total investigations were performed three times for three months from June to August, 2011. Total green-able walls were located in 498 places with a total length of 8,449m and gross vertical area of $23,754.90m^2$. The classification results of total green-able walls by the four types were Type "A" at $1,936.65m^2$, Type "B" at $5,875.30m^2$, Type "C" at $12,487.85m^2$ and Type "D" at $3,455.10m^2$. This study analyzed how all facade areas of the green-able walls impacted the biotope area ratio at the site. First, the biotope area ratio regarding all the zones in Jung-gu District was defined as the gross biotope area ratio while the biotope area ratio regarding all of the artificial zones was defined as the net biotope area ratio. In the case of the gross biotope area ratio, 17.97% is current ration with a projected increase to 0.10% after wall-planting. In the case of the net biotope area ratio, 4.73% is the current ration with a projected increase to 0.11% after wall-planting. This 0.11% is about 2.28% of 4.73%. This study looks at all wall-plantings that have been constructed throughout a high density area to observe their impact on the improvement of ecological function therein. With consideration of the landscape value of the facade, the regional effectiveness of wall-planting is expected to increase even more.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 2008.04a
• /
• pp.355-358
• /
• 2008

미국, 일본 등 해외 선진국에서는 교통사고를 과학적으로 분석하기 위해서 많은 연구가 활발히 이루어지고 있다. 특히 교통사고가 발생하면 어느 차량이 가해차량 이고 피해 차량인지 판단하기가 매우 어려운 실정이다. 본 논문에서는 이러한 문제점을 해결하기 위해서. 교통사고 발생 전후 일정 시간 동안 진행차량의 주변 상황을 자동 녹화하고, 특히 충돌방향으로 카메라의 방향을 이동시켜서 충돌 시에 차체의 방향이 변경되더라도 그에 따라 카메라의 촬영 각도를 변경시켜 충돌전후의 상황을 정확하게 녹화할 수 있는 시스템을 제안하였다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2010.06d
• /
• pp.196-201
• /
• 2010

영상보안 시장은 DVR(Digital Video Recorder)을 중심으로 아날로그 시스템을 디지털로 빠르게 대체하며 네트워크를 이용한 고화질 시장으로 발전을 거듭하고 있다. DVR의 핵심적인 기능인 녹화, 검색 기능은 시스템에서 상대적으로 속도가 느린 디스크 자원의 의존도가 높은 기능으로 성능에 직접적인 영향을 미치는 녹화 파일 포맷이 최적화 되지 않을 경우 심각한 성능 문제를 일으킬 수 있다. 본 논문에서는 인덱스를 이용하여 고속 탐색 및 재생 성능을 유지하면서 비디오와 오디오 데이터 외에도 다양한 형태의 이벤트 데이터를 수용하여 DVR의 녹화와 검색 기능의 실제 운용 환경에 적합한 AMS (Advanced Multi-channel Streaming) 파일 포맷을 설계하고 최근 DVR 전용 파일 포맷으로 제안된 ESP 파일 포맷과의 비교 실험을 통하여 기능 및 성능이 향상되었음을 확인 하였다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2014.11a
• /
• pp.902-904
• /
• 2014

사람감지를 통한 영상녹화 시스템은 컴퓨터가 입력받은 영상으로부터 사람인 부분을 감지하고 녹화하는 시스템이다. 영상처리를 기반으로 한 사람감지 방법은 그 내용이 비교적 난해하고 학습량이 방대하기 때문에 관련 분야의 입문자들이 직접 구현하기에 어려움이 수반된다. 따라서 이 논문은 초보자들이 해당 분야에 보다 쉽게 접근할 수 있도록 하기 위해 공개 소스 컴퓨터 비전(OpenCV) 라이브러리의 사람 감지 API를 제공한다. 또한, 이를 이용해 웹캠을 통해 입력받은 영상에서 사람인 부분을 표시해주고, 녹화하는 시스템을 구현하였다.