2조형(條型) Combine의 이용(利用)에 관(關)한 연구(硏究)

이상우,김성래,Lee, Sang Woo,Kim, Soung Rai 충남대학교 농업과학연구소 1976 Korean Journal of Agricultural Science Vol.3 No.1

도입(導入)된 2조용(條用) Combine으로 통일(統一) 및 밀양(密陽) 15호(號) 수도품종(水稻品種)에 대(對)한 포장수확작업(圃場收穫作業)을 실시(實施)하여 Combine의 작업정도(作業精度) 작업성능(作業性能) 기계적(機械的)인 적응성(適應性)을 파악(把握)하고 한국(韓國)에서의 보급전망(普及展望)을 분석검토(分析檢討)한바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 장간종(長稈種)인 밀양(密陽)15호(號)에 대(對)한 Combine 수확작업(收穫作業)은 수확적기(收穫適期)로 부터 13일(日) 경과후(經過後)까지 5회(回)에 걸쳐 시기별(時期別)로 수확작업(收穫作業)을 실시(實施)한바 완숙도(完熟度)에 관계(關係)없이 수확작업(收穫作業) 양호(良好)하였으며 포장손실율(圃場損失率) 1% 미탈곡율(未脫穀率) 1%로 양호(良好)한 편(便)이었다. 2. 단간종(短稈種)인 통일(統一)에 대(對)한 Combine 수확작업(收穫作業)은 완숙기(完熟期)로 부터 수확시기(收穫時期)가 경과(經過)될 수록 포장손실(圃場損失)이 Fig 1과 같은 경향으로 5.13%에서 10.34%로 증가(增加) 하였으며 통일(統一)벼 수확(收穫)을 위(爲)하여는 기계적(機械的)인 개선(改善)이 많이 요망(要望)되었다. 3. 공시(供試)된 Combine은 장간종용(長稈種用)의 기종(機種)이어서 벼 이삭의 높이가 균일(均一)치 못한 단간종(短稈種) 통일(統一)벼는 탈곡부(脫穀部)의 공급(供給) Chain과 급실(扱室)과의 거리가 커서 급동(扱胴)의 급치(扱齒)에 못미치는 부분(部分)이 있어 미탈곡립율(未脫穀粒率)이 평균(平均) 1.6%이었다. 4. Combine 탈곡부(脫穀部) 급동(扱胴)의 회전수(回轉數)(240~350R.P.M)와 동할미(胴割米)의 관계(關係)는 통일(統一) 및 밀양(密陽)15호(號) 양품종(兩品種) 모두 동할율(胴割率)이 1% 미만(未滿)으로 유의차(有意差)가 없었다. 5. 통일(統一)벼는 벼 이삭이 잎속에 들어 있어 탈곡시(脫穀時) 검불의 양(量)이 많으며 특(特)히 생탈곡시(生脫穀時)는 검불량이 더 많이 생기므로 양곡부(揚穀部) 및 배진구(排塵口)에서 폐쇄현상(閉鎖現像)이 자주 일어남으로 선별(選別) 및 배진장치(排塵裝置)의 개선(改善)이 요망(要望)된다. 6. Combine의 접지압(接地壓)은 $0.19kg/cm^2$로 Fig3과 같은 약(弱)한 지내력(地耐力)의 토양(土壤)에서 Combine의 Track이 25cm 침하(沈下)하여도 Combine의 주행(走行)은 가능(可能)하였다. 그러나 지내력(地耐力)은 지점(地点)에 따라 균일(均一)치 않아 침하(沈下)의 깊이가 균일(均一)치 못함으로 침하(沈下) 5cm정도(程度)에서는 예취(刈取) 높이의 조정(調整)없이 수확작업(收穫作業)이 가능(可能)할 것으로 인정(認定)된다. 7. 관행수확작업(慣行收穫作業)과 Combine 수확작업(收穫作業)의 경제성(經濟性)을 검토(檢討)한바 수도맥작(水稻麥作)의 연간(年間) 사용일수(使用日數)를 40일(日)로 하고 작업일수율(作業日數率) 60% 포장작업효율(圃場作業效率) 56%로 할 때 작업속도(作業速度)를 0.273m/sec로 하여 분석(分析)한바 1일작업시간(日作業時間)을 8시간(時間)으로 할 때 연간부담면적(年間負擔面積)이 4.7ha로 ha당(當) 수확작업비용(收穫作業費用)이 관행수확작업비용(慣行收穫作業費用)과 일치(一致)함으로 통일(統一)벼 수확작업(收穫作業)에 이용(利用)될 수 있도록 Combine의 기계적(機械的)인 보완개량(補完改良)이 뒤따르면 Combine의 흡착(吸着)은 경제적(經濟的)으로 타당(妥當)하다고 인정(認定)된다. 8. 장간종(長稈種)의 현(現) Combine을 통일품종수확(統一品種收穫) 작업(作 This study was conducted to test the harvesting operation of two kinds of rice varieties such as Milyang #15 and Tong-il with a imported two furrow Japanese combine and was performed to find out the operational accuracy of it, the adaptability of this machine, and the feasibility of supplying this machine to rural area in Korea. The results obtained in this study are summarized as follows; 1. The harvesting test of the Milyang #15 was carried out 5 times from the optimum harvesting operation was good regardless of its maturity. The field grain loss ratio and the rate of unthreshed paddy were all about 1 percent. 2. The field grain loss of Tong-il harvested was increased from 5.13% to 10.34% along its maturity as shown in Fig 1. In considering this, it was needed that the combine mechanism should be improved mechanically for harvesting of Tong-il rice variety. 3. The rate of unthreshed paddy of Tong-il rice variety of which stem was short was average 1.6 percent, because the sample combine used in this study was developed on basisof the long stem variety in Japan, therefore some ears owing to the uneven stem of Tong-il rice could nat reach the teeth of the threshing drum. 4. The cracking rates of brown rice depending mostly upon the revolution speed of the threshing drum(240-350 rpm) in harvesting of Tong-il and Milyang #15 were all below 1 percent, and there was no significance between two varieties. 5. Since the ears of Tong-il rice variety covered with its leaves, a lots of trashes was produced, especially when threshed in raw materials, and the cleaning and the trashout mechanisms were clogged with those trashes very often, and so these two mechanisms were needed for being improved. 6. The sample combine of which track pressure was $0.19kg/cm^2$ could drive on the soft ground of which sinking was even 25cm as shown in Fig 3. But in considering the reaping height adjustment, 5cm sinking may be afford to drive the combine on the irregular sinking level ground without any readjustment of the resaping height. 7. The harvesting expenses per ha. by the sample combine of which annual coverage area is 4.7 ha. under conditions that the yearly workable days is 40, percentage of days being good for harvesting operation is 60%, field efficiency is 56%, working speed is 0.273m/sec, and daily workable hours is 8 hrs is reasonable to spread this combine to rural area in Korea, comparing to the expenses by the conventional harvesting expenses, if mechanical improvement is supplemented so as to harvest Tong-il rice. 8. In order to harvest Tong-il rice, the two furrow combine should be needed some mechanical improvements that divider can control not to touch ears of paddy, the space between the feeding chain and the thrshing drum is reduced, trash treatment apparatus must be improved, fore and rear adjust-interval is enlarged, and width of track must be enlarged so as to drive on the soft ground.

분사구멍의 길이가 수직 분사구멍 내부에서의 3차원 유동에 미치는 영향

이상우,주성국,Lee, Sang Woo,Joo, Seong Kuk 대한기계학회 1998 大韓機械學會論文集B Vol.22 No.9

Effects of a length-to-diameter ratio, L/D, on the three-dimensional flow and aerodynamic loss within an injection hole, which is normally oriented to the mainflow, have been investigated by using a straight five-hole probe. The length-to-diameter ratio of the injection hole is varied to be 0.5 and 2.0 for blowing ratios of 0.5, 1.0 and 2.0. Regardless of the blowing ratio, flows within the hole and at the jet exit are strongly affected by the length-to-diameter ratio. In the case of L/D=0.5, the inside flow is considerably influenced by the mainflow, and the exit flow variation is found to be the greatest. The aerodynamic loss in this case is usually attributed to jet -mainflow interactions. In the case of L/D=2.0, the flow separation and reattachment in the inlet region are completely separated from the complicated exit flow, and the aerodynamic-loss production is mainly due to the inlet flow separation.

XLPE 절연체의 트리 채널내 보이드방전에 의한 AE신호로 절연열화 검출 기법 연구

이상우,Lee, Sang-Woo 한국조명전기설비학회 2006 조명·전기설비학회논문지 Vol.20 No.2

본 논문은 전력 케이블의 절연체인 XLPE 시료에 상용주파수 교류전압을 인가하였을 때, 절연열화에 의한 보이드방전 펄스신호와 AE신호 및 트리진전 특성을 검출하고 관찰하였다. 또한 XLPE 절연체의 트리 채널내 인가전압에 따라 보이드방전 펄스신호와 AE신호를 각각 관측하였다. 실험 결과 전력 케이블의 절연체인 XLPE 시료의 보이드 존재 유 무에 따른 트리진전 형상은 보이드 존재시에는 수지형으로 성장하였으나, 무보이드시에는 수초형으로 성장하였다. XLPE 절연체내의 트리진전 특성은 보이드 존재시에는 열화시간이 경과함에 따라 급격히 증가하였으나, 무보이드시에는 열화 시간이 경과함에 따라 트리의 성장 형상은 감소되는 것으로 나타났다. 전력 케이블 절연체인 XLPE의 트리 채널내 보이드방전에 의한 AE신호의 주파수 스펙트럼으로 분석한 결과, AE신호의 크기에 따라 변화되었으며 그 주파수 영역은 대략 1.0[MHz] 이하의 분포인 것으로 관측되었다. In this paper, to detect and observation the void discharges pulse signal, AE signals and tree growth characteristics in case the high voltage is applied to a XLPE sample for a power cable. We also examined the partial discharge current pulse and AE signals with the increase of the applied voltage in XLPE insulation. The experimental results show that a branch-type tree grows in the presence of the voids, and a bush-type tree grows in the absence of the voids in both samples. A rate of tree growth increases abruptly in proportional to the deterioration time in the presence of the of the voids, but in the absence of the voids, a rate of tree growth decreases as time goes by and finally a breakdown occurs. The frequency band of AE signals that are generated from the partial discharges in a XLPE sample, one of solid dielectric materials, is about 1.0[MHz].

상자형 복부판의 좌굴 거동에 관한 연구

이상우,권영봉,Lee, Sang Woo,Kwon, Young Bong 한국강구조학회 1997 韓國鋼構造學會 論文集 Vol.9 No.1

The buckling behavior of the web of steel girders are largely dependent on the size and the location of stiffeners and the restraining effect of top and bottom flanges. Elastic and inelastic buckling analyses based or the Spline Finite Strip Method were executed to study the stiffening effect of the longitudinal stiffener on the web of box girders and to find how the top and bottom flanges had effects on the web, where geometric boundary conditions were limited by both hinged, both fixed and the flange sections. The basic assumption for the longitudinal end boundary conditions was that the vertical stiffeners had the rigidity enough to force nil deflection line on the web panel so that the junction line between web and vertical stiffener was assumed to be hinged boundary conditions. The provisions on the longitudinal stiffener of the plate and box girders of the Korean Standard Highway Bridge Specifications(1995) and AASHTO Specifications(1994 LRFD) were compared with the results obtained numerically for the various longitudinal stiffener size of box girders. Simple equations and design curves for the longitudinal stiffener of the web were proposed for the practical use.

중국증권시장의 정보이전효과에 관한 연구

이상우,이의경,Lee, Sang-Woo,Lee, Eui-Kyung 한국데이터정보과학회 2012 한국데이터정보과학회지 Vol.23 No.6

본 논문은 중국의 상해, 심천, 홍콩증권시장간의 정보이전효과를 연구한 것이다. 세 개의 중국 증권시장은 모두 미국의 증권시장수익률에 강하게 영향을 받는데 그 정도는 개방화가 제일 잘된 홍콩증권시장이 가장 크며 상해증권시장, 심천증권시장의 순으로 영향을 받는 것으로 나타나고 있다. 상해증권시장이나 심천증권시장은 서로 간에 수익률이전효과나 변동성전이효과가 존재하지 않지만 이 두 시장은 모두 홍콩증권시장수익률의 영향을 받는 것으로 나타났다. 하지만 미국증권시장의 움직임을 통제하면 이러한 효과는 사라지게 되어 중국의 증권시장간의 정보이전효과는 존재하지 않는 것으로 나타나고 있다. 이러한 결론은 중국의 세 개의 증권시장이 상호독립적인 성격이 강하다는 것을 의미하며, 중국의 증권시장 연구 시 시장 간의 독립성을 반영해야 할 것으로 생각된다. This study examines stock market co-movement among three China stock markets: Shanghai stock market, Shenzhen stock market, Hongkong stock market. US stock market leads three China stock markets and Honkong stock market leads Shanghai and Shenzhen stock market. But there are no lead-lag effects among China stock markets after controlling US stock market effect. These results could be important for the investors and firms that are interested in China stock markets.

공간통계기법을 이용한 도로교통기반의 온실가스 관한 연구 -대구광역시를 대상으로-

이상우,이승욱,이승엽,홍원화,Lee, Sang Woo,Lee, Seung Wook,Lee, Seung Yeob,Hong, Won Hwa 한국공간정보학회 2014 한국공간정보학회지 Vol.22 No.1

본 연구는 대구광역시의 주요도로를 대상으로 공간통계기법을 이용하여 도로교통 온실가스 배출량을 신뢰성있게 예측하여 추정된 배출량으로 행정구별에 따라 도로교통에서 발생한 온실가스 배출량을 산정하는 것을 목적으로 하였다. 첫째, 주요도로의 교통량 관측지점에서 실시간으로 조사한 교통량을 이용하여 관측지점에서 발생한 온실가스 배출량을 산정하였다. 둘째, 일반 크리깅(Universal Kriging)기법을 이용하여 공간적 상관성에 의해 미 관측지점의 온실가스 배출량을 신뢰성 있게 추정하기 위해 적합한 베리오그램 모델링을 설정하였다. 이에 교차검증을 통하여 적합한 베리오그램 모델과 크리깅 기법의 타당성을 검증하였다. 셋째, 검증된 크리깅 기법으로 미 관측지점의 도로교통에서 발생한 온실가스 배출량을 예측하여 행정구별로 도로교통 온실가스 배출량을 추정하여 산정하였다. 그 결과, 도로교통 온실가스 배출량을 행정구별로 보면 북구가 약 $291,878,020kgCO_2eq/yr$로 가장 많은 온실가스를 배출하는 것으로 나타났다. This study was intended to reliably predict the traffic green house gas emission in Daegu with the use of spatial statistical technique and calculate the traffic green house gas emission of each administrative district on the basis of the accurately predicted emission. First, with the use of the traffic actually surveyed at a traffic observation point, and traffic green house gas emission was calculated. Secondly, on the basis of the calculation, and with the use of Universal Kriging technique, this researcher set a suitable variogram modeling to accurately and reliably predict the green house gas emission at non-observation point suitable through spatial correlation, and then performed cross validation to prove the validity of the proper variogram modeling and Kriging technique. Thirdly, with the use of the validated kriging technique, traffic green gas emission was visualized, and its distribution features were analyzed to predict and calculate the traffic green house gas emission of each administrative district. As a result, regarding the traffic green house gas emission of each administration, it was found that Bukgu had the highest green house gas emission of $291,878,020kgCO_2eq/yr$.

남북한 분단체제와 신상옥의 영화

이상우(Lee Sang-Woo) 한국어문학회 2010 語文學 Vol.0 No.110

This article examine the relation between Korea’s division system and the films of Shin Sang-ok, who was one of very famous Korean film directors in the golden age of Korean cinemas. Shin Sang-ok has been maybe the only Korean director, who produced his films in two Koreas. Before he was kidnapped by North Korean kidnap gangs, he was an outstanding film director in South Korea, who produced several popular films, as like 〈A Romance Papa〉, 〈King Yeonsan〉, 〈the evergreen tree〉, 〈a guest and mother)〉, 〈the Red muffler〉, and so on. Also, He managed the biggest film company ‘Shin Film’ and the biggest film studio ‘Anyang Film Studio’ in South Korea in 1960s, he maintained to good relation with the president Park Chung-hee’s government at that time. However, as Shin criticized the film policy of Park Chung-hee’s government, especially the problem of film censorship, the conflicts between them went to worse way in 1970’s. And then Shin was kidnapped with his ex-wife a famous Korean film actress Choi Eun-hee to North Korea. Shin abd Choi stayed in there during the 8 years and produced 7 films in North Korea’s Monolithic Ideal Logical System by Kim Jung-il’s enforcement and immense supports. At that time, Shin produced several remarkable films in North Korea, as like 〈not returned the emissary〉, 〈the salt〉, 〈a story of the escape〉. Finally, Shin and Choi escaped from North Korea for obtaining the freedom to the Western world. Two Koreas’s division system brought the restriction of creative film making to a film director Shin Sang-ok.

수확기(收穫機)의 성능향상(性能向上)에 관(關)한 연구(硏究)(I) - 수도(水稻)의 탈립저항력(脫粒抵抗力)에 관(關)하여

이상우,허윤근,Lee, Sang Woo,Hur, Yun Kun 충남대학교 농업과학연구소 1981 Korean Journal of Agricultural Science Vol.8 No.2

충남농촌진흥원(忠南農村振興院) 포장(圃場)에서 표준시비법(標準施肥法)으로 재배(栽培)한 Japonica형(型) 품종(品種) 이이(裡里)348호(號), 이이(裡里)345호(號) 및 밀양(密陽)15호(號) 3개斗(個)와 Indica ${\times}$ Japonica hybrid형(型) 품종(品種) 밀양(密陽)23호(號), 이이(裡里)342호(號), 수원(水原)294호(號)의 4개(個), 계(計) 7 개(個) 품종(品種)에 대해 적정수확기간(適定收穫期間)을 중심(中心)으로 9월(月)28일(日)부터 10월(月)20일(日)까지 2일간격(日間隔)으로 3축방향(軸方向)에 대(對)하여 탈립저항력(脫粒低抗力)을 측정(測定)하였다. 10월(月)1일(日) 채취(採取)된 시료(試料)를 실험실(實驗室)에서 자연건조(自然乾燥)시키면서 함수율별(含水率別) 탈립증항력(脫粒拯抗力)을 측정(測定)하였다. 본(本) 연구(硏究)의 결과(結果)는 다음과 같다. 1. 외력(外力)이 지경(枝梗)과 평행방향(平行方向)으로 작용(作用)될 경우 Japonica형(型) 품종(品種)의 탈립저항력(脫粒低航力) 평균(平均) 113grdljTEk. 2. 외력(外力)이 지경(枝梗)과 $90^{\circ}$ 측방향(側方向)으로 작용(作用)될 경우의 탈립증항력(脫粒拯抗力)은 평행방향(平行方向)과 비교(比較)하여 Japonica형(型) 품종(品種)은 33~50%인 59.8~115.0gr이었고, Indica ${\times}$ Japonica hybrid형(型) 품종(品種)은 7~21%인 9.8~28.2gr으로 현저(顯著)히 작았다. 3. 기온(氣溫)이 영하(零下)로 강하(降下)하지 않은 본실험기간중(本實驗期間中) 예취일(刈取日)에 따른 탈립심지항력(脫粒甚至抗力)의 변화(變化)는 크게 없었다. 4. 예취후(刈取後) 자연건조(自然乾燥)에 따른 탈립심지항력(脫粒甚至抗力)은 함수율(含水率)의 감소(減少)와 함께 감소(減少)하였다. 5. 이삭 부위별(部位別) 탈립서항력(脫粒鼠抗力)은 상부측(上部側)에 비(比)해 하부측(下部側)에서 약간 큰값을 나타냈다. Threshing forces of seven varieties, that is, three Japonica type varieties-Irri 348, Irri 345, and Milyang 15, and four Indica type varieties-Milyang 23, Irri 342, Suweon 294 and Suweon 287-, which have been cultivated in the standard fertilization field being at Chungnam Provincial Office of Rural Development, Youseong, Chungnam-do, they were measured every other day in the period from September 28 to October 20 which were included the proper harves ting time. Also the threshing forces were checked in three-dimensional directions. Relationships between threshing forces and moisture contents of the unthreshed rice were examined in the laboratory as dried in the natural condition. The results of this study were as follows; 1. The mean threshing force of Japonica type varieties was about 1969r. and that of Indica type varieties was about 113gr. when external force was loaded in the direction parallel to the grain. 2. The threshing force bent to the grain was about 9.8through 28.2gr. equal to 7 through 21 percent to the threshing force parallel to the grain in Indica type varieties meanwhile about 59.8 through 115.0gr equal to 33 through 50 percent in Japonica type varieties. 3. Under the warmer temperature than $0^{\circ}C$, the change of threshing forces was not great in this experimental period on the harvesting dates. 4. The threshing force decreased s lightly as moisture content decreased in natural drying under the shade after cutting. 5. The threshing force of the lower portion was a little biger than that of the upper portion in an ear.

물리화학적 처리를 이용한 군부대 사격장 내 중금속 오염 토양의 정화

이상우,이우춘,이상환,김순오,Lee, Sang-Woo,Lee, Woo-Chun,Lee, Sang-Hwan,Kim, Soon-Oh 한국지하수토양환경학회 2021 지하수토양환경 Vol.26 No.5

This study evaluated the feasibility of combined use of physical separation and soil washing to remediate heavy metals (Pb and Cu) contaminated soil in a military shooting range. The soils were classified into two types based on the level of heavy metal concentrations: a higher contaminated soil (HCS) with Pb and Cu concentrations of 6,243 mg/kg and 407 mg/kg, respectively, and a lower contaminated soil (LCS) with their concentrations of 1,658 mg/kg and 232 mg/kg. Pb level in both soils exceeded the regulatory limit (700 mg/kg), and its concentration generally increased with decreasing soil particle size. However, in some cases, Pb concentrations increased with increasing soil particle size, presumably due to the presence of residues of bullets in the soil matrix. As a pretreatment step, a shaking table was used for physical separation of soil to remove bullet residues while fractionating the contaminated soils into different sizes. The most effective separation and fractionation were achieved at vibration velocity of 296 rpm/min, the table slope of 7.0°, and the separating water flow rate of 23 L/min. The efficiency of ensuing soil washing process for LCS was maximized by using 0.5% HCl with the soil:washing solution mixing ratio of 1:3 for 1 hr treatment. On the contrary, HCS was most effectively remediated by using 1.0% HCl with the same soil:solution mixing ratio for 3 hr. This work demonstrated that the combined use of physical separation and soil washing could be a viable option to remediate soils highly contaminated with heavy metals.

공간지리 가중회귀모형(GWR)을 이용한 유역 녹지비율과 하천수질의 비균질적 관계 검증

이상우,Lee, Sang-Woo 한국조경학회 2013 韓國造景學會誌 Vol.41 No.6

This study aims to examine the presence of non-stationary relationship between water quality and land use in watersheds. In investigating the relationships between land use and water quality, most previous studies adopted OLS method which is assumed stationarity. However, this approach is difficult to capture the local variation of the relationships. We used 146 sampling data and land cover data of Korean Ministry of Environment to build conventional regressions and GWR models for BOD, TN and TP. Regression model and GWR models of BOD, TN, TP were compared with $R^2$, AICc and Moran's I. The results of comparisons and descriptive statistics of GWR models strongly indicated the presence of Non-Stationarity between water quality and land use. 본 연구는 낙동강 대권역에서 공간지리 가중회귀모형을 이용하여 녹지지역과 BOD, TN, TP를 포함하는 수질과의 지역적 비균질적 관계를 검증하고자 수행되었다. 대부분 기존의 상관분석 혹은 회귀분석은 OLS (Ordinary Least Square)기법에 기초한 균질적 관계의 분석에 초점을 두어 왔다. 이러한 녹지지역과 수질의 균질적 관계에 기초한 분석은 지역적으로 변화를 고려하지 않는 단점이 있다. 연구대상지는 낙동강 대권역내 146개 지점이며, 수질자료와 토지피복 자료는 환경부 자료를 활용하였다. BOD, TN, TP에 대하여 일반 회귀모형과 모델과 GWR 모델을 추정하여 비교하였다. 비교결과, BOD와 TN의 GWR 모델이 OLS 모델에 비하여 우수한 것으로 나타났다. GWR 모델의 $R^2$와 녹지지역의 계수 값의 기초통계량을 분석한 결과, 지역적으로 큰 변동이 확인되었다. 이러한 결과는 유역 토지이용과 수질과의 관계가 공간적으로 비균절적이라는 것을 입증하여 주었다.