干拓地土壤의 除鹽을 위한 石膏處理效果

具滋雄 全北大學校 1989 論文集 Vol.31 No.-

This study was performed to analyze the effects of gypsum treatments for the desalinization of reclaimed tidelands and to obtain the basic data for determiniing the appropriate amount of gypsum. Desalinization experiments with various gypsum treatments were conducted through two water management practices, namely, the leaching method and the rinsing method, using the samples of silt loam soil and silty clay loam soil sollected in reclaimed tidelands. The results obtained from this study were summarized as follows: 1. In accordance with the USDA classification system of salt affected soils, the sample soils, the sample soils used in this study were saline-sodic soils with the high electrical conductivity and the high exchangeable sodium percentage. 2. The gypsum treatments had great effects on the desalinization of reclaimed tidelands by the leaching method, but had no effect on the desalinization of reclaimed tidelands by the rinsing method. 3. The vlaue of pH showed a tendency to increase during the desalinization of reclaimed tidelands and could be decreased in some degree by gypsum treatments. 4. The remarkable effects of gypsum treatments for the desalinization by leaching could be considered to desalinize readily by proving the permeability of soils and to reduce the leaching time elapsed.

“은행나무” 根端部位別의 酸素消費量

李載斗,蘇雄永 成均館大學校 1962 論文集 Vol.7 No.-

The average rate of oxygen consumption by the 0∼1, 1∼2, 2∼3 mm. segments of Ginkgo biloba root tip was measured in a Warburg apperatus. This data was 0.35±0.12 (O_2 uptake) for 0∼1 mm., 1.04±0.18 for 1∼2 mm., 0.57±0.06 for 2∼3 mm. Consequently, the average O_2 consumption is greater in the differentiation part than in the enlargement part and division part, and, in enlargement part is more increased than in division part. Therefore, it is found that oxygen consumption is constant related to histological aspect in root Tip of Ginkgo bolaba.

전남쌀의 가격차별화 현황과 발전방향

이기웅,허상만,박준근,구자옥 全南大學校 農業科學技術硏究所 1996 農業科學技術硏究 Vol.31 No.-

Competitiveness of rice comes from higher quality and lower price. The latter accrues from cost reduction which is in turn possible through the economies of scale. Economies of scale is, however, very difficult to achieve because of small-scaleness of rice acreage in Chonnam Province and expensive land price. Therefore, rice competitiveness should be complemented by utilizing quality differentiation both vertically and horizontally. Chonnam rice is somehow treated as a lemon good among the metropolitan consumers like in Seoul. It is a problem to be coped with. According to our research results, Chonnam rice carried the lowest price in the rice markets of the big cities. In Taegu city, Chonnam branded rice was not sold at the department stores, and it was sold only at one place in Pusan. In other words, Chonnam rice is treated as a lemon good and shunned by some localities across the nation. In order to remedy this unfavorable situation, Chonnam rice should be differentiated both vertically and horizontally in terms of variety selection, storage, milling and processing, packaging, etc. Especially, development of new brands and quality guarantee is ncccss. Besides, both publicizing and improving rice quality should be emphasized to promote Chonnam rice at the national level.

水稻作 耕地의 區劃規模에 따른 農業機械의 作業性能(Ⅱ) : 乾畓直播 栽培 Direct-Seeding in dry Land

유수남,구자웅 全南大學校 農業科學技術硏究所 1997 農業科學技術硏究 Vol.32 No.-

본 연구는 건답직파 수도재배의 경우 농업기계 이용측면에서 포장의 대구획화에 따른 경지정리의 적정 구획규모 결정을 위한 기초자료와 영농의 효율화와 생산성 향상을 위한 영농방법 및 이에 따른 기계화 작업체계 수립의 기초자료를 제공하고자 경지구획(경구)의 규모와 형상에 따른 대형 고성능 농업기계의 포장작업능률, 포장작업효율 등을 분석하였으며, 그 연구결과를 요약하면 다음과 같다. 1. 장변 길이가 길어짐에 따라 이앙작업을 제외한 모든 작업에서 포장작업능률과 포장작업효율은 높아지는 것으로 나타났으며, 이에 따라 ha당 총작업소요시간도 줄어들었다. 2. 단변의 길이 증가에 따른 포장작업능률과 포장작업효율은 구동경운, 정지, 파종작업 등에서는 약간씩 증가하였으며, 수확작업에서는 거의 일정하게 나타난 반면, 제초제 살포와 병충해약제 살포 등 방제작업과 추비살포작업에서는 약간씩 낮아지는 것으로 나타났다. 한편 시비작업(기비살포)에서는 단변의 길이 변화에 따라 크게 변동하였다. ha당 총작업소요시간은 대체적으로 방제작업의 비중이 상대적으로 크기 때문에 단변의 길이 증가에 따라 약간씩 감소하는 것으로 나타났다. 3. 포장작업능률은 거의 모든 작업에서 동일한 구획규모에서는 장단변비의 증가에 따라 대체적으로 증가하였으며, 또한 같은 장단변비에서는 구획규모가 클수록 증가하는 것으로 나타났다. 총작업소요시간은 동일한 구획에서는 장단변비가 커질수록 감소하며, 같은 장단변비에서는 구획규모가 클수록 적어짐을 보였다. 그러나 장단변비가 커질수록 포장작업능률 증가율과 총작업소요시간의 감소율은 떨어지는 것으로 나타났다. 4. 대구획화를 위하여 장변의 길이를 길게하는 것은 단변을 길게하는 것보다 거의 모든 작업에서 효과적으로 포장작업능률과 포장작업효율을 높일수 있는 것으로 나타났다. 현행 농업기계 체계를 고려해 볼 때 장변의 길이는 100∼150 m, 단변의 길이는 60∼80 m로 각각 제한되어 적정 구획규모는 약 0.6∼1.2 ha 정도인 것으로 판단되며, 포장의 배수성 개선, 대형 트랙터에 적합한 부착작업기의 채용,포장주행이 가능한 방제 및 추비살포기계의 개발이 이루어진다면 농업기계능률을 높이기 위하여 1.2∼1.6 ha의 구획규모로 경지를 대구획화하는 것이 바람직 할 것으로 보인다. This study was carried out to evaluate the effect of field size on field capacities of farm machines and their operating times for determining the optimum field size in direct-seeding of rice in dry land. As long side length increases, the field capacities and field efficiencies increased and total operating time per ha of the machines decreased in most works. As short side length increases, the field capacities and field efficiencies increased slightly in rotary tilling, pulverizing, and seeding works, and were almost constant in harvesting work. But those were changed irregularly due to the wide effective working width in fertilizing work, and were decreased slightly owing to the time loss for resting in weedicide and pesticide application works. Total operating time per ha of the machines decreased slightly as the short side length increases. As the ratio of long side length to short side length increases under same field size, the field capacities of the machines increased and total operating time per ha of the machines decreased. But, increasing rates of field capacities and decreasing rate of operating time per ha were reduced gradually. In the case of same ratio, field capacities increased and total operating time per ha decreased as the field size increases. Increase of the long side length is more effective than that of the short side length for improving the field capacities of machines and reducing their operating times. Long side length is limited by the loading capacities of chemical distributers and short side length is limited by the effective working width of machines. And therefore long side and short side can be lengthende up to 100 - 150 m and 60 - 80 m, respectively and optimum field size is in the range of 0.6 - 1.2 ha under the current farm machine system. But, if improvement of drainage, and development of chemical distributer which can run in the field are achieved, field size in the range of 1.2 - 1.6 ha is desirable for improving field capacities of machines.

Improvement of Dynamic Respiration Monitoring Through Sensor Fusion of Accelerometer and Gyro-sensor

Ja-Woong Yoon,Yeon-Sik Noh,Yi-Suk Kwon,Won-Ki Kim,Hyung-Ro Yoon 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.1

In this paper, we suggest a method to improve the fusion of an accelerometer and gyro sensor by using a Kalman filter to produce a more high-quality respiration signal to supplement the weakness of using a single accelerometer. To evaluate our proposed algorithm’s performance, we developed a chest belt-type module. We performed experiments consisting of aerobic exercise and muscular exercises with 10 subjects. We compared the derived respiration signal from the accelerometer with that from our algorithm using the standard respiration signal from the piezoelectric sensor in the time and frequency domains during the aerobic and muscular exercises. We also analyzed the time delay to verify the synchronization between the output and standard signals. We confirmed that our algorithm improved the respiratory rate’s detection accuracy by 4.6% and 9.54% for the treadmill and leg press, respectively, which are dynamic. We also confirmed a small time delay of about 0.638 s on average. We determined that real-time monitoring of the respiration signal is possible. In conclusion, our suggested algorithm can acquire a more high-quality respiration signal in a dynamic exercise environment away from a limited static environment to provide safer and more effective exercises and improve exercise sustainability.

A method to measure of the liquid suspension nanoparticle size in aerosols

Ja Young PARK,Minjeong KWAK,Nam Woong NAM WOONG 한국진공학회 2016 한국진공학회 학술발표회초록집 Vol.2016 No.8

A Case of Recurrent Superficial Acral Fibromyxoma

Ja Woong Goo,Ye Jin Jung,Jae Hong Kim,Sung Yul Lee,Sung Ku Ahn 대한피부과학회 2010 Annals of Dermatology Vol.22 No.1

Superficial acral fibromyxoma (SAFM) is a rare myxoid tumor that was first described in 2001. The presence of a very slow growing solitary tender mass in the subungual area is the typical clinical feature at presentation. Histopathologically, SAFM is composed of stellate cells in a myxocollagenous matrix with a poorly circumscribed margin. This tumor is thought to be benign, but its natural course is not fully understood. We describe a 15-year-old patient with recurrent SAFM and discuss the proper treatment and follow up. (Ann Dermatol 22(1) 110∼113, 2010)

염해토양개량에 있어서 수리전도도 (水理傳導度)의 영향

구자웅(Ja Woong Koo),남우(Woo Nham) 전북대학교 농업과학기술연구소 1986 농업생명과학연구 Vol.17 No.-

대구획화 (大區劃化) 경지정리에 있어서 용 (用) 배수관리상 제한요소의 검토

구자웅(Ja Woong Koo),손재권(Jae Gwon Son),최진규(Jin Kyu Choi) 전북대학교 농업과학기술연구소 1995 농업생명과학연구 Vol.26 No.-

소아 형제에서 연속적으로 발생한 급성 전신성 발진성 농포증

구자웅 ( Ja Woong Goo ),최응호 ( Eung Ho Choi ) 대한피부과학회 2007 대한피부과학회지 Vol.45 No.3

Acute generalized exanthematous pustulosis (AGEP) is clinically characterized by the abrupt onset of erythema, non-follicular superficial pustules, fever and rapid spontaneous healing. Other findings such as peripheral neutrophilia and histologically neutrophilic spongiosis and microabscess also suggest AGEP. Its cause was focused on drug and viral infection, but the latter lacks objective evidence as a causative factor. We report two cases of AGEP that serially occurred in siblings without obvious drug history, which strongly suggests there is a possibility that AGEP could be caused by viral infection. (Korean J Dermatol 2007;45(3):271~274)