• Korean journal of applied entomology
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• v.45 no.1 s.142
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• pp.37-43
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• 2006

Catch of garden thrips, Frankliniella intonsa, on sticky traps was assessed by color and height in commercial plastic vinyl house strawberry crops grown on 40-cm-high trellises. Yellow, blue and white sticky cards were tested for color attractiveness, and upper (50 cm), lower (10 cm above the floor) and ground were for height. At each height, trapped thrips on yellow, blue and white were significantly different. Blue sticky cards were significantly greater than traps on yellow and white. The trapped thrips were also significantly greatest at 50 cm above the floor, less at lower and ground. However, there is no significantly different the population of garden thrips on the flower in each tested site.

• Korean journal of applied entomology
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• v.51 no.1
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• pp.67-72
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• 2012

This study was conducted to evaluate the scouting methods for larva and adults of the alfalfa weevil, $Hypera$ $postica$ Gyllenhal on Chinese milkvetch, $Astragalus$ $sinicus$ L. in the field. Three sampling methods, shake-bucket, shake-picking, and a sweeping net were evaluated for collecting alfalfa weevil larvae. We found significant differences among scouting methods and date in all survey fields. Sweep-net sampling was less able to detect small larvae than large larvae, which were not detected until early April whereas the shake-bucket, and shake-picking methods efficiently collected larvae from middle March. A Pitfall trap with three different baits - no bait, kidney bean seeds and sprouting kidney beans were compared for collection efficiency of alfalfa weevil adults. Collection efficiencies were significantly different by bait(p<0.018). Traps baited with sprouting kidney beans were the most efficient for collecting the alfalfa weevil. The number of alfalfa weevil caught was not significantly different between kidney bean seed and no bait in the pitfall trap. Therefore, the shake-bucket method for larvae and a pitfall trap baited with sprouting kidney beans for adults are recommended for scouting of the alfalfa weevil in a Chinese milkvetch field.

• Journal of Bio-Environment Control
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• v.6 no.2
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• pp.86-91
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• 1997

This study was conducted to improve group production structure of green pepper in greenhouse. Plant was trained 45$^{\circ}$ branching, erection after 45$^{\circ}$ branching and erection. Light absorption index was calculated to investigate relation of light intensity and leaf area in different plant type according to plant height. Group production structure was analyzed with relative light intensity and dry weight of plant. In total growing seasons, group production structures were good in order of erect type after 45$^{\circ}$ branching > erect type > 45$^{\circ}$ branching type in view of light absorption, leaf and stem distribution. Plant height of erect type was taller than any other case, and average node length of 45$^{\circ}$ branching type was shorter than any other case. But stem diameter, leaf area, fresh weight and dry weight of erect type after 45$^{\circ}$ branching were superior to any other case. Yield is order of erect type after 45$^{\circ}$ branching > 45$^{\circ}$ branching type > erect type.

• Proceedings of the KIEE Conference
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• 2005.07d
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• pp.2836-2838
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• 2005

본 논문에서는 다양한 조명하에서 실시간으로 눈을 검출하고 추적하는 새로운 방법을 제안하고자 한다. 기존의 능동적 적외선을 이용한 눈 검출 및 추적 방법은 외부의 조명에 매우 민감하게 반응하는 문제점을 가지고 있으므로, 본 논문에서는 적외선 조명을 이용한 밝은 동공 효과와 전형적인 외형을 기반으로 한 사물 인식 기술을 결합하여 외부 조명의 간섭으로 밝은 동공 효과가 나타나지 않는 경우에도 견실하게 눈을 검출하고 추적 할 수 있는 방법을 제안한다. 눈 검출과 추적을 위해 SVM과 평균 이동 추적방법을 사용하였고, 적외선 조명과 카메라를 포함한 영상 획득 장치를 구성하여 제안된 방법이 효율적으로 다양한 조명하에서 눈 검출과 추적을 할 수 있음을 보여 주었다.

• Journal of Korean Society of Disaster and Security
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• v.12 no.2
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• pp.47-56
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• 2019

Recently, in order to overcome the difficulty of entering a fire source due to the occurrence of a large amount of smoke in the event of a fire in a parking lot, it has used that a method of discharge smoke using air supply, exhaust fans and jet fans installed for ventilation of parking lots. In this study, the variation of flow in the smoke layer was observed using CCTV under two conditions, in which only the air supply fan operates and the manned fan operates together, and the temperature around the plume was compared to Albert eq. to assess its suitability as a parking lot ventilation performance evaluation method. As a result, it was found that the smoke layer could be disturbed if the Jet Fan was operated at the same time, which could lead to the possibility of an initial evacuation disturbance. However, the additional operation of the Jet Fan has been confirmed by the observation CCTV that the emission performance is improved, which is believed to help conduct the suppression operation. The temperature around the plume was measured and compared to Alpert eq, and was analyzed to be about $2^{\circ}C$ lower at the center axis of the plume and $9.0^{\circ}C$ higher at 8 m in the direction of the discharge of smoke. The results of temperature measurements around the plume were lower than the maximum temperature expected in AS 4391 and did not exceed the expected temperature risk caused by the experiment. As with these results, the temperature risk from the progression of hot smoke tests is foreseeable, so it will be available as one of the general evaluation methods for assessing smoke control performance in a parking lot without relevant criteria.

• Journal of Advanced Navigation Technology
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• v.25 no.6
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• pp.510-516
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• 2021

Recently, the range of utilization and demand for unmanned aerial vehicle (UAV) has been continuously increasing, and research on the construction of a separate operating system for low-altitude UAV is underway through the development of a management system separate from manned aircraft. Since low-altitude UAVs also fly in the airspace, it is essential to establish technical standards and certification systems necessary for the operation of the aircraft, and research on this is also in progress. If the operating standards and certification requirements of the aircraft are presented, a test method to confirm this should also be presented. In particular, the accuracy of small UAV's navigation required during flight is required to be more precise than that of a manned aircraft or a large UAV. It was necessary to calculate a separate navigation error. In this study, we presented a test method for deriving navigation errors that can be applied to UAVs that have difficulty in acquiring long-term operational data, which is different from existing manned aircraft, and conducted verification tests.

• 한국정보교육학회:학술대회논문집
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• 2007.08a
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• pp.129-134
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• 2007

학교 현장에서의 컴퓨터 교육은 여전히 시범실습위주로 이루어지고 있으며. 초등학교 컴퓨터 교육에서 많은 비중을 차지하는 소프트웨어 교육은 더욱 그러하다. 소프트웨어는 끊임없이 개발되거나 업그레이드 되고 있어 가르쳐야 할 내용이 많아져 새로운 학습방법이 필요하다. 즉 문제사태에서 필요한 기능을 찾아 스스로 문제를 해결하고 다른 응용소프트웨어에 전이 및 파지할 수 있는 능력을 길러주는 학습방법이 필요하다. 그 방법 중의 하나가 구성주의 학습 원리에 부합한 문제중심학습이며 학습의 효과를 높이기 위해서 온라인과 오프라인학습의 장점을 혼합한 B-러닝 방법이 필요하다. 따라서 본 연구는 응용소프트웨어의 적응력을 향상시키기 위해 한글 워드프로세서 학습내용을 학습자의 수준에 맞게 문제중심으로 재구성하고 온라인 학습을 위해 학급커뮤니티를 설계 및 구현하였다. 그리고 문제중심의 B-러닝에 적합한 학습모형을 설계하여 제시하였다. 문제중심의 B-러닝은 구성주의 학습 원리에 적합한 실생활의 문제를 학습내용으로 하고 면대면 교실수업의 장점과 온라인 학습의 장점을 혼합하여 자기주도적으로 탐구학습을 하는 것이므로 응용소프트웨어의 적응력은 향상될 것으로 기대한다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10e
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• pp.157-159
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• 2002

슈퍼컴퓨터 사용자들은 FTP(File Transfer Protocol)을 이용해서 파일을 전송한다. 전송되는 데이터들은 여러 분야에 걸친 연구관련 자료로서 고성능 슈퍼컴퓨터에 의한 연산 처리가 요구되며 그 결과들은 연구결과에 많은 영향을 준다. 사용자들의 연구 데이터가 담긴 대용량 파일의 전송할 때 성능향상 방법을 적용하고 네트워크 상태에 따라 QoS(Quality of Service)를 할당한다면 데이터의 손실률을 최소화하고 신뢰성 있는 네트워크 상태로 인하여 사용자들은 연산처리 결과가 더욱 정확하다고 신뢰할 수 있다. 본 고에서는 대용량 파일을 전송 할 때 성능을 향상시키는 방법과 QoS 적용 방법을 알아본다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.419-420
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• 2020

본 논문에서는 불법복제 영상 판단을 위한 RGB 변위값 측정을 통한 360도 영상 식별 기준 키 프레임 선정 방법을 제안한다. 방송 프로그램이나 영화 등과 같은 콘텐츠는 인터넷들을 통하여 국내뿐만 아니라 해외로도 대량 불법 유통됨으로써 국가적으로 큰 손실이 발생하고 있다. 본 논문에서는 이러한 불법복제 여부를 빠른 속도로 판단하기 위한 방법으로 360도 영상에서 추출된 각각의 프레임에서 RGB 변위값을 측정하여 동일한 장면으로 인식되는 프레임을 하나로 묶어 해당 장면의 키 프레임으로 선정한다. 본 논문에서 제안한 방법은 불법복제 영상의 판단 시간을 단축시키고 판단 정확도를 향상시킬 수 있는 효과가 있다.

• Journal of Bio-Environment Control
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• v.7 no.3
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• pp.226-236
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• 1998

If the lowest leaves of the cucumber were removed or training cultivable method was changed, a computer vision system could divide well the cucumber fruit from the others, and also an end-effector could reach and grip cucumber fruit and cut well its fruit stalk. Therefore, this study investigated whether removal leaves and training cultivable method of a cucumber could affect its growth and yield. They can help to be designed the vision system and the end-effector. A cucumber fruit grew by 6-l5cm long for 2 days regardless of removing leaves. Removal leaves didn't affect growth of cucumber fruit. Number of cucumber fruit was produced within 10% different values by three methods (A, B, C) of removal leaves. The first grade rate (best quality) of 4 B and C was 56.7%, 53.1%, 56.3% respectively. Consequently, proper removal leaves were better than traditional way, which does not remove a leaf, because they make cucumber plant ventilate more freely and absorb more light.