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박오현 ( Oh Hyun Park,),박윤철 ( Yun Chul Park ),이동규 ( Dong Gyu Lee ),김호현 ( Ho Hyun Kim ),박찬용 ( Chan Yong Park ),김정철 ( Jung Chul Kim ) 대한외상학회 2013 大韓外傷學會誌 Vol.26 No.3
Purpose: Abdominal trauma rarely causes injuries involving duodenum. But, it is associated with higher rate of the complication and mortality than other abdominal injuries. There are many options for the management of duodenal injuries. Herein we are to review our experiences and find out the risk factors related to the morbidity and the mortality in traumatic duodenal injuries. Methods: The medical records of total 25 patients who managed by surgical managements and survive more than 48 hours were conducted from January 2006 to December 2012. The clinical characteristics, treatments, and outcomes are reviewed. Results: Among 25 patients, most of them (n=17, 68.0%) were managed by the pyloric exclusion and the gastrojejunostomy. The 3rd portion is the most injured site (n=15, 60.0%), and the majority exhibited grade 2 severity (n=14, 56.0%). Most of patients had blunt abdominal traumas (n=23, 92.0%) so that many of them (n=14, 56.0%) had other combined abdominal injuries. The mean ISS is 11.5±6.2. The surgery related mortality rate was 28.0%. There was no statistical significance between each factors and the mortality except leakage (p=0.012). But, we could find some trends about traumatic duodenal injuries in this study. The mortality rates of them who older than 55 years were higher than others. And, all 3 patients who delayed the operation more than 24 hours after the trauma had some complications or died. Also, the patients who had the 2nd portion injury, grade 3 injury, or combined abdominal injury were less survived. Conclusion: Duodenal injury is related to high rate of morbidity(47.8%) and mortality(28.0%). Age, portion of injury, OIS grade, ISS>15, combined intra-abdominal operation, and trauma to operation time over 24 hrs have some trend with attribution to mortality. Especially leakage of duodenal injury is related to mortality.
송창섭 ( Song Chang Seob ),김명환 ( Kim Myeong Hwan ),박오현 ( Park Oh Hyun ),우제근 ( Woo Jea Kuen ),김기범 ( Kim Gi Beom ) 한국농공학회 2021 한국농공학회논문집 Vol.63 No.3
Reclaimed land was mainly used as agricultural land for rice production. As a higher value-added business in the agriculture has recently been activated, green houses are being constructed. In case of green house construction on the reclaimed land, it is generally soft ground with high soil water content, so it is important to design the foundation for greenhouse construction. The object of this study, a pull-out test was conducted to derive the base line data of the wooden pile foundation when constructing a green house. To reproduce the actual site, 30% of soil saturation and 70% of soil saturation were created in the soil box. Groove number and depth were set as design factors of the wooden pile, and a pull-out test was conducted. As a result of the test, pull resistance increased as the number of grooves increased, pull-out resistance according to groove depth was different according to soil saturation. Also, after the experiment, we want to compare the set-up effects over time.
박오현, 송창섭, 김명환, 김기범 충북대학교 농업과학기술연구소 2020 農業科學硏究 Vol.36 No.1
In this study, the characteristics of shear strength parameters of weathered granite soils were???? observed. The test was cyclic wetting and drying process using the direct shear tester. The wetting state than drying state had lower the cohesion and internal friction angle. The higher fine-grained soil content than the lower content soil was measured smaller the cohesion and internal friction angle. The cohesion result of cyclic test was increased after a decreased, internal friction angle was decreased constant ratio. The large grain size soil was small the change of cohesion by the influence of water, the internal friction angle was increased. The ground should be well thought out because it’s hard to confirm the effect of rainfall infiltration and ground saturation over time. Therefore, using this study, It will be able to analyze the characteristic by soil classification, particle and cyclic load.