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녹비의 토양환원 방법(무경운, 경운)에 따른 토양 이화학성 변화 평가
임정은 ( J E Lim ),이상수 ( S S Lee ),정세희 ( S H Jeong ),이병모 ( B M Lee ),이영한 ( Y H Lee ),최용범 ( Y B Choi ),옥용식 ( Y S Ok ) 강원대학교 농업생명과학연구원 2012 농업생명환경연구 Vol.24 No.4
In this study, the effects of application methods of green manure on soil properties were evaluated by investigating the soil physicochemical properties. The maize field located in Gangwon province was selected and two plant species, rye (Secale cereale L.) and hairy vetch (Vicia villosa Roth), were grown in the field and used as green manure. After harvesting, the crop residues were mixed with the 0-25 cm top soil with conventional tillage (GCT) and were top dressed on the soil surface with no-tillage (GNT) on June 21, 2011. To ensure the changes in soil physicochemical properties, soil samples were collected at 10 cm depth and the bulk density was also determined on August 26, 2011. Soil layers were divided into two parts of 0-30 cm and 30-60 cm for determining soil biological properties such as soil microbial biomass. At 0-25 cm, the differences of soil physical properties such as bulk density (GNT, 1.29 Mg/m3; GCT, 1.52 Mg/m3) and porosity (GNT, 51.4%; GCT, 42.5%) were observed. It was mainly affected by seasonal rainfall rather than the application methods. Lower pH (GNT, 4.61; GCT, 5.29), higher EC (GNT, 0.34 dS/m; GCT, 0.07 dS/m) and higher nitrate content (GNT, 34.30 mg/kg; GCT, 3.18 mg/kg) were found under GNT than those under GCT. Soil microbial biomass under GCT was higher than that under GNT. It may be resulted from increasing soil C and N from the addition of green manure crops.
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Prediction of Wind-induced pressure Difference in Buildings
이영,Lee, Y. 대한설비공학회 1988 설비저널 Vol.17 No.4
바람은 건물 외벽에서의 압력차의 주요인의 하나이다. 바람에 의한 압력차를 정확히 예측할 수 있다는 것은 외벽에 있어서의 풍하중, 건물내로 투입되는 공기양의 설계치 결정, 그리고 건물을 사용하는 거주인의 병리학적 면에서 보다 중요한 것이다. 단열재로 잘 설계된 건물에서는 투입되는 공기에 의한 열부하가 전체 열부하의 30 ~ 50%도 될 수 있으며, 화재시 화염과 연기의 확산에도 중요한 문제이다. 20층 아파트를 사용해서 실물실험을 한 후 측정된 여러가지 값을 예측할 수 있는 방법을 고찰했으며 본 연구에서는 건물에서 바람에 기인되는 압력차를 예측하는 modeling과 Simulation에 있어서의 고찰할 여러가지 재원을 제시했다. 또한 Model을 이용한 실험결과는 Simulation에 있어서 적합한 조건을 충족시키면 풍동을 사용하여 바람에 기인하는 압력차를 예측할 수 있다는 것이 증명되었다.
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추호렬,우건석,이영인,문수호,Choo, H. Y.,Woo, K. S.,Reed, David K.,Lee, Y. I.,Moon, S. H. 한국응용곤충학회 1988 한국응용곤충학회지 Vol.27 No.1
Phytophagous insects were surveyed for biological control of weeds in the southern part of korea from April 20 to July 31, 1987. Phytophagous coleopteran insects representing 12 families, 52 genera and 61 species, hemipteran insects 7 families, 18 genera and 20 species, homopteran insects 4 families, 16 genera and 21 species, hymenopteran insects 2 families, 2 genera and 3 species, and orthopteran 2 familes, 6 genera and 6 species were recorded from 58 weeds. Some chrysomelids and orthopteran insects were potential agents for biological control of weeds.
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임신 28 주에서 42 주의 자궁내 성장제한 태아와 정상 태아의 심박동 양상의 비교
이영 ( Y Lee ),김수평 ( SP Kim ),신종철 ( JC Shin ),이종승 ( JS Lee ),이선영 ( SY Lee ),송희영 ( HY Song ),황지영 ( JY Hwang ),임채춘 ( Chae Chun Rhim ),김기범 ( KB Kim ) 대한산부인과학회 1998 Obstetrics & Gynecology Science Vol.41 No.8
In order to evaluate the functional state of fetus, cardiotocography was performed on 67 cases of asymmetrical intrauterine growth restriction pregnancy (experimental group) and 85 cases of normal pregnancy (control group) at 28 to 42 weeks` gestation. The signal loss rate, baseline fetal heart rate, oscillation frequency and amplitude were obtained by analyzing the cardiotocographies which were measured by autocorrelated HP 8040-A. The results were as fallows: 1. Mean signal loss rate of experimental group (0.67%) was significantly higher than that in control group(0.38%). 2. Mean of baseline fetal heart rate was significantly higher in experimental group (145.3 bpm) than in control group (142.9 bpm) and was significantly decreased with increasing gestational weeks in both groups(r=-0.60, -0.49). 3. Proportions of oscillation frequency of the cardiotocogram below 2 cpm and between 2-6 cpm were significantly higher in experimental group (4.2%, 83.1%) than in control group (1.7%, 78.7%) however, those above 6 cpm was significantly lower in experimental group (12.7%) than in control group (19.6%). With increasing gestational weeks in both groups, these proportions were significantly increased in frequency above 6 cpm and decreased in frequency between 2∼6 cpm. 4. Proportions of oscillation amplitude below 5 bpm and between 5∼10 bpm were significantly higher in experimental group (6.0%, 63.3%) than in control group (1.5%, 51.2%), however, those between 10∼25 bpm and above 25 bpm were significantly lower in experimental group (27.0%, 3.7%) than in control group (40.3%, 7.0%). With increasing gestational weeks, these proportions were significantly decreased in amplitude between 5∼10 bpm and increased in amplitude between 10∼25 bpm and above 25 bpm in both groups. From the above findings, it suggested that the variability of cardiotocogram be significantly decreased in intrauterine growth restriction fetus than in normal fetus, however, be significantly increased with increasing gestational weeks in both groups.
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