신경회로망을 이용한 용접잔류응력 예측에 관한 연구

차용훈,김일수,김하식,이연신,김덕중,성백섭,서준열 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.6

In order to achieve effective prediction of residual stresses, the series experiment were carried out and the residual stress-es were measured using the backpropagation algorithm from the neural network and the sectional method. Using the experimental results, the optiomal control algorithms using a neural network should be developed in order to reduce the effect of the external disturbances on residual stresses during GMA welding processes. The results obtained from the comparison between the measured and calculated results, showed that the neural network based on backpropagation algorithm can be used in order to control weld quality. This system can not only help to under-stand the interaction between the process parameters and residual stress, but also, improve the quantity control for welded structures. The development of the system is goal in this study.

근위 대퇴정을 이용한 대퇴 전자부 골절의 치료

문영완,서동현,강신택,권덕주,지용남,이기병 대한골절학회 2003 대한골절학회지 Vol.16 No.1

목 적 : 근위 대퇴정을 이용한 고령 환자의 대퇴전자간 골절의 치료결과에 대해 보고하고자 한다. 대상 및 방법 : 2001년 4월부터 2002년 2월까지 대전자부에서 소전자에 이르는 횡선골절 및 소전자 주위 분쇄골절로 압박고 나사 고정이 용이하지 않은 전자간 골절, 일반적인 전자간 골절에 대해 근위 대퇴정을 사용해 치료한 80례 중 추시가 가능했던 71례를 대상으로 하였으며, 추시과정 중 골유합 시기, 대퇴경간각, 지연나사의 활강, 수술시간 및 출혈량, 술중 및 술후 합병증 수술시 주의사항을 조사하였다. 결 과 : 평균연령은 77.5세, 평균추시기간은 9개월이었다. Evans의 분류법으로 골절을 분류하여 안정성, 불안정성 골절은 30례, 41례였다. 평균 골 유합 시비는 13.8주였고, 대퇴경간각은 수술직후 131.9 ± 5.21˚, 129.9 ± 6.04˚ 였으며 평균지연나사의 활강은 4.21±4.13㎜였다. 수술시간은 평균 61분, 출혈량은 평균 0.67pint(134cc)였다. 술중 합병증으로는 정복 실패 1례, 원위고정나사 삽입시 피질골 골절 1례, drill bit 파손 1례가 있었으며, 술후 합병증으로는 대퇴 경간각 소실(5도이상) 12례, 경부골절의 발생이 2례, 지연나사의 관절내 돌출 1례였다. 결 론 : 대퇴골 전자부 골절의 치료로 근위 대퇴정은 정확한 삽입 위치, 삽입시의 조심스러운 확공, 지연나사의 연골하 골에 단단하게 고정시키는 등의 주의를 한다면 수술시간, 출혈량 감소 등의 술중 합병증을 줄이고, 견고한 내고정을 통한 조기 보행을 가능하게 하며, 좋은 골유합 등이 기대되므로, 특히 고령, 분쇄골절, 역행성 골절, 골다공증이 심한 경우에서 바람직한 수술방법으로 사료된다. Purpose : To evaluate the treatment results of geriatric intertochanteric fractures using a proximal femoral nail. Materials and Methods : From April 2001 to February 2002, 71 cases of the intertrochanteric fractures involving lesser trochanter, transverse or reverse oblique intertrochanteric fracture. We evaluated the bone union time, neck-shaft angle, lag screw sliding by follow up radiographs, operation time, blood loss and complications. Results : The average age was 77.5 years old, the mean duration of follow-up was 9 months and the mean duration of bone union was 13.8 weeks. The average neck-shaft angle on immediate postop. x-ray was 131.9 ± 5.21˚ and 129.9 ± 6.04˚ at last follow up and the average lag screw sliding was 4.21 ± 4.13㎜. The average operation time was 61 minutes and blood loss was 0.67 pints(134cc). Intraoperative complications were inadequate reduction in one case, difficulty in distal transfixing in one case and drill bit failure in one case and postoperative complications were loss of neck-shaft angle(more than 5 degree) in 12 cases, femur neck fracture in 2 cases and intraarticular cutting out of femur neck screw in one case. Conclusions : The use of the proximal femoral nail could be appropriate for the fixation of communited or reverse oblique intertrochanteric fracture in elderly, osteroporotic patients for early ambulation, preventing shortening and rotation deformity, and reducing operation time and blood loss.

보리 telotrisomic 個體의 後代轉達比率과 初期生育特性

Duck Yong Suh(徐得龍),Eun Gi Cho(趙銀基),Soon Jong Kweon(權純鍾),Hyung Soo Suh(徐亨洙) 한국육종학회 1991 한국육종학회지 Vol.23 No.1

Transmission rate of extra telocentric chromosomes and some agronomic characteristics were studied at early leaf stage in 11 monotelotrisomics and 4 ditelotrisomics, compared with each their sist-diploids of barley. Mean transmission rate of 11 monotelotrisomics was 27.5%, but that of 4 ditelotrisomics was 20.2% in next selfing generation. Observed the mitosis of Triplo 3S and 5S, 2n=14+2 telos and 2n=15 plants were found. Besides, in ditelotrisomics of Triplo 5S and 7S, 2n=15+1 fragment were found also. On the other hands, compared with sist-diploids, at eraly leaf stage, leaf color of Triplo 1L, 2L and 2S were dark green, and those leaf shapes of Triplo 1L and 2L were very long and narrow. In tillers of main stem, Triplo 1L, 1S and 2L were more than each their sistdiploids. But Triplo 1L and 2L were drooping shape in plant type, while the others wer erect or semierect. Root-system of Triplo 1L and 2L were well developed, long and more, but Triplo 4L and 7S were very poor. Ditelotrisomic 5S and 7S were almost the same in plant type, leaf shape and leaf color to each monotelotrisomic ones.

Comparison of surgical-site infection between open and laparoscopic appendectomy

Yong Joon Suh,Seung-Yong Jeong,Kyu Joo Park,Jae-Gahb Park,Sung-Bum Kang,Duck-Woo Kim,Heung-Kwon Oh,Rumi Shin,Ji Sun Kim 대한외과학회 2012 Annals of Surgical Treatment and Research(ASRT) Vol.82 No.1

Purpose: An inflamed appendix can be removed either openly (open appendectomy [OA]) or laparoscopically (laparoscopic appendectomy [LA]). Surgical-site infection (SSI) is a representative healthcare-associated infection and can impose serious economic burdens on patients as well as affect morbidity and mortality rates. The aim of this study was to compare LA with OA in terms of SSI. Methods: The medical records of 749 patients (420 males; mean age, 33 years) who underwent appendectomy (OA, 431; LA, 318) between September 1, 2008 and April 29, 2010 were retrospectively reviewed for demographic and pathologic characteristics, recovery of bowel movement, length of hospital stay, and postoperative complications. Results: The frequency of purulent/gangrenous or perforated appendicitis was not significantly different between LA and OA groups (83% [263/318 cases] vs. 83% [359/431 cases], P = 0.183). The time to first flatus after surgery was not significantly different between the two groups (1.38 ± 1.07 days for LA, 1.33 ± 0.90 days for OA, P = 0.444), but the length of hospital stay was significantly shorter in LA group than in OA group (3.37 ± 0.12 days vs. 3.83 ± 0.12 days, P = 0.006). The frequency of overall SSI was not significantly different between the two groups (2.8% for LA, 4.6% for OA, P = 0.204), but that of superficial incisional SSI was significantly lower in LA group (0.6% vs. 3.9%, P = 0.016). Conclusion: The results of this study suggest that LA may lead to a shorter length of hospital stay and may have a lower risk of superficial incisional SSI than OA.

Agropyron × triticum 由來 多年生 小麥 agrotricum의 主要特性과 遺傳

Duck Yong Suh(徐得龍),Bong Ho Lee(李泰鎬),Hyung Soo Suh(徐亨洙) 한국육종학회 1987 한국육종학회지 Vol.19 No.4

Major agronomic characteristics of the progenies of the crosses between Agrotricum and Triticum cultivars and their perennial plant segregations were studied. Crossability of Agrotricum and Triticum was depending upon the crossed Triticum parents diversed from 18% to 44%. Perennial plants were segregated with 20% in F₁ and 12% in F₂ generation of Agrotricum × Olmil. Spikes per plant and grains per spike were less than those of Agrotricum. From the ratoon after first grain harvest, second harvest could be done. Spike length and yield components in second harvest were shorter and less than first ones, but little degree of decrease in grain weight and grains per spike were observed. The grain yield of promising perennial hybrid plant H26, was 40% of first harvest in the second.

보리 早熟 多收性 品種育成 硏究 Ⅰ. 熟期類型 및 播種期에 따른 收量 및 收量構成要素의 比較

Duck Yong Suh(徐得龍)Dal Ung Kim(金達雄) 한국육종학회 1987 한국육종학회지 Vol.19 No.1

A study was carried to get basic information of barley breeding for early and high yielding varieties. In isogenic analysis, early variety was 19-2% lower in grain yield than late one. The grain yield was higher in the maturing type which flower early but mature late, while lower in other maturing type, flower late but mature early. In a tipical maturing type of Korean barley cultivars, which flower early and mature early, number of grains per spike and 1000-grains weight were major factors to increase the grain yield. In the different seeding date, maturing period of early variety was longer than late one. On the while, grain yield and number of spikes per square meter were decreased severely by the delay of seeding date, but number of grains per spikes and 1000-grains weight were not.

보리 品種의 耐倒伏性과 節間特性과의 關係

Duck Yong Suh(徐得龍),Eun Gi Cho(趙銀基),Hyung Soo Suh(徐亨洙) 한국육종학회 1991 한국육종학회지 Vol.23 No.2

A study was carried out to find the relationship between internode characters and lodging resistance in barley varieties. Regardless of 8 varieties or 3 lodging resistance groups, the first internode length from the top was the longest, and that shorter and shorter go to lower internode. Among the internodes, positive correlationship between the one and the next were highly recognized except between the second and the thrid. The percentage ratios of each internode length to the culm length were in diversity according to varieties. But this phenomina were little different among the groups, especially between strong and weak ones. The third internode diameter in all varieties was the thickest. Mean internode diameter of strong lodging resistance group was thicker than that of the other groups. In the relationship of each internode diameter, most of them were highly positive correlationship except between the first and the forth and fifth, the second and the fifth internode. Of the mineral content in culm, phosphoric acid and kalium content were lower, but calcium content was higher of strong lodging reistance varietal group than those of the other groups. On the while, magnesium content was almost the same among groups, but silicic acid content of strong lodging resistance group(4.30%) was higher than that of the weak group(2.38%) and medium group(2.76%).

脫芒性 보리의 까락特性과 遺傳

Duck Yong Suh(徐得龍),Hee Seang Park(朴熙生),Hyung Soo Suh(徐亨洙) 한국육종학회 1994 한국육종학회지 Vol.26 No.2

The genetic segregation of awn-brittleness (da2) and awn characteristics of a barley variety Milyang 55 were exammined. Awn of Milyang 55 shattered at 35~40 days after heading in the field. Its culm length was 85㎝ and head length was 3.2㎝. Heading date of this variety was April 23 and maturing date was May 30. Among yield components, number of spikes per ㎡ was 606, number of grains per spike was 52, and 1,000-grain weight was 31.9g. Grain yield per 10a was 268㎏ with lodging resistance. All F₁ plants of Milyang 55/Alchanbori showed normal awn. But F₂ progenies of this cross were segregated with the ratio of 13(normal) : 3(brittleness). This suggested that the inhibiting factor acts on the expression of awn-brittleness. In the cross of Milyang 55 and Milyang 6, the same genetic pattern also recognized. Milyang 55 and its progenies have very good agronomic characteristics, especially grain shape with awn-brittleness.

보리 早熟 多收性 品種育成 硏究 Ⅱ. 收量構成要素의 品種間 差異

Duck Yong Suh(徐得龍),Hyung Soo Suh(徐亨洙) 한국육종학회 1991 한국육종학회지 Vol.23 No.1

To obtain the information of selection index for early maturing varieties of barley with high yield, 2 maturing groups which have 25 different varieties were applied. In early maturing group, the heritability of heading date was highest, and that maturing date, 1000 grain weight, grains per spike, spikes per ㎡ and grain yield were the next higher ones in order. But in late maturing group, this order was very similar to early group one except 1000 grains weight. On the point of correlationship between characteristics related with grain yield, in the early maturing group, there were positive correlationship between earliness and grains per spike, grain yield, while negative correlationship was there with spikes per ㎡. In the late maturing group, even if heading date and maturing date were high positive correlationship with grains per spike and with spikes per ㎡, there were negative correlationship between spikes per ㎡ and grains per spike. On the path-coefficient analysis, direct effect of grains per spike to grain yield was highest, in the early maturing varieties of yield components, while the one of 1,000 grain weight on grain yield was highest in the late ones.

A New Black Soybean Cultivar, “Geomjeongsaeol” with Large Seed,Early Maturity and Lodging Tolerance

In-Youl Baek,Keum-Yong Park,Jung-Kyung Moon,Yong-Ho Kim,Sun-Lim Kim,Ja-Hwan Ku,Yeong-Ho Lee,Yong-Hwan Ryu,In-Youl Baek,Won-Young Han,Hyun-Tae Kim,Jun-Hyeon Cho,Jong-Min Ko,Doo-Chull Shin,Duck-Yong Suh 한국육종학회 2005 한국육종학회지 Vol.37 No.5

A new black seed coated soybean cultivar with yellow cotyledon, Geomjeongsaeol was developed at the YeongnamAgricultural Research Institute (YARI) in 2004. Geomjeongsaeol was selected from a cross Keunol/ Geomjeongol. The prelimi-nary, advanced, and regional yield trials for evaluation and selection of this line (Milyang 123) were carried out from 1999 tospherical seed shape, oval leaflet shape, and large seed size (31.1 grams per 100 seeds), and it was 4 days later in maturity than thecheck variety Geomjeongol. In the seed quality such a crude protein, oligo-saccharide, and anthocyanin contents, Geomjeongsaeolwas higher than check variety, and it has good adaptability for cooking with rice. It also has been identified to have resistance tosaeol was 2.34 ton per hectare in the regional yield trials (RYT) carried out for two years from 2003 to 2004 which was 26 percenthigher than the check variety Geomjeongol.