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이준선,서동우,고진석 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.1
Schlumberger soundings and dipole-dipole electrical surveys were carried out in and around the Pungam landfill in June and November, 1999. To elucidate the annual variation of resistivity structure in and around the landfill, 12 electrical soundings and 6 lines of dipole-dipole surveys were conducted. Interpretations of these data show that mean resistivity values become lower and thickness of contaminated layers by leachate thicker than those of the around the landfill. Especially, mean thicknesses of saturated layers with leachate increased by about 13.6m~46.2m and resistivities of bedrock decreased. From these results, resistivity variations in the landfill indicates contamination of layers is in progress. And it appears that contamination of weathered zone is in progress mainly inside and in the front area of the landfill.
구순 구개열 환자의 성장후 측모형태에 관한 두부계측방사선학적 연구
장익준,손우일,송재철,진병로 영남대학교 기초/임상의학연구소 2001 Yeungnam University Journal of Medicine Vol.18 No.1
Background: Cleft lip and palate deformity have unknown patterns of maxillofacial growth and development. The maxillofacial growth can be affected either by congenital or environmental factors such as infection and trauma. Surgical repair of cleft lip and palate may interfere the subsequent growth and development of maxillofacial region. The purpose of this study is to evaluate the characteristics of maxillofacial growth patterns in adult cleft lip and palate patients. Materials and Methods: The material for this study consisted of 17 adult male patients with cleft lip and palate. Cephalometric tracing and measurements were done by one investigator. The relationship between 17 cleft lip and palate patients and Korean norms were evaluated statistically Results: There were statistically differences in Na. perpendicular to point A, SNA angle, effective maxillary length, maxillofacial differencial, Wit's appraisal and upper incisor to point A(p<0.01). Pogonion to Na. perpendicular also statistically differed(p<0.05). Other measurements didn't statistically differ. Conclusion: It was evident that in adult cleft lip and palate patients, maxilla was retruded and short. Careful cleft lip and palate repair and treatment are recommended for facilitating normal growth of maxilla.
Ha Jun-Woo,Lee Yangkyu,Kim Kyung Hyun,Moon Bong Ju,Park Jeong Yoon,Chin Dong Kyu,Kim Keun Su,Jang Hyun Jun 대한말초신경학회 2024 The Nerve Vol.10 No.1
Isolated spinal artery aneurysms are rare vascular lesions of the spinal cord. Due to their rarity, the natural disease course and treatment guidelines have not been clearly defined. Here, we report a case of an angiography-negative isolated spinal aneurysm in the thoracic spine surgically that was treated without neurological compromise using indocyanine green (ICG) and intraoperative neurophysiological monitoring (IONM). A 52-year-old man without any prior medical history presented to the emergency room with acute lower back and bilateral leg pain accompanied by worsening voiding and difficulty defecating. Magnetic resonance imaging (MRI) of the lumbar spine showed a diffuse subarachnoid hemorrhage in the lumbar spine. The patient was initially treated conservatively with painkillers, but experienced a rapid recurrence of symptoms. A follow-up MRI scan showed subacute transformation and expansion of the subarachnoid hematoma, as well as a non-enhancing, intradural, extramedullary lesion at the T12/L1 level. Angiography did not show any remarkable findings, and surgical exploration revealed a thrombosed aneurysmal lesion. The lesion did not show ICG uptake, and temporary clipping of the caudal end of the lesion did not lead to changes in motor-evoked potential signals. A pathological examination revealed a capillary vascular structure in granulation tissue with organizing thrombi, favoring a thrombosed, granulated lesion over a vascular neoplasm. Ruptured, isolated spinal aneurysms can be especially difficult to diagnose and treat when angiography findings are negative. We report that a spinal artery aneurysm can be safely excised using intraoperative ICG and IONM.
EV Traction용 매입형 영구자석 동기전동기의 집중권/분포권에 따른 특성 비교
진준우(Jun-Woo Chin),박민로(Min-Ro Park),김해중(Hae-Joong Kim),홍정표(Jung-Pyo Hong) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
This paper deals with the characteristic of interior permanent magnet synchronous motor(IPMSM) for traction of electric vehicle(EV). EV is an excellent alternatve for conventional inner combustion engine(ICE) vehicle. As high torque and wide operation range are essential for EV traction motor, IPMSM is suitable for EV traction application. Concentrated and distributed winding differ in characteristics of interior permanent magnet motor. Thus, this paper compares electric characteristics of concentrated and distributed winding. The finite element analysis(FEA) is performed both for concentrated winding model and distributed winding model to calculate characteristics such as torque, power, losses and efficiency.
서혜부 탈장에서 전복막외 복강경 탈장교정술과 개방적 탈장교정술의 비교 분석
전강웅(Kang-Woong Jun),정헌(Hun Jung),김성집(Sung-Jeep Kim),전경화(Kyong-Hwa Jun),진형민(Hyung-Min Chin),김준기(Jun-Gi Kim),박우배(Woo-Bae Park) 대한외과학회 2009 Annals of Surgical Treatment and Research(ASRT) Vol.77 No.4
Purpose: Laparoscopic herniorrhaphy has been recognized as one of the treatment options for inguinal hernia. This study compared the short-term results of two methods of repair: totally extraperitoneal (TEP) repair and open tissue based repair. Methods: A retrospective review was conducted on all patients who underwent laparoscopic TEP repair (LH, 105 cases) and open repair (OH, 57 cases) at our hospital between September 2007 and December 2008. Posterior wall repairs in open technique follow as McVay (25 cases) and Bassini (32 cases). Demographic data, operation time, perioperative complications, consumption of analgesics, and hospital stay were compared. Results: There was no significant difference in relation to patient characteristics; age, gender, BMI, medical and surgical history and hernia type. Also, there was no difference of operation time for both groups. Patients in the LH group consumed fewer analgesics (P=0.002). Intraoperative complications occurred more frequently in the LH group (P=0.036) but postoperative complications were similar. Hospital stay was shorter in LH (P<0.001). There was no difference of recurrence between LH group and OH group for 16 months. Conclusion: Laparoscopic TEP repair shows similar postoperative complications and recurrences and with less postoperative pain and hospital stay, compared with open tissue based hernia repair. However, further study with longer follow up data is necessary.
Comparison of Outcomes between Primary Closure vs. Patch Angioplasty in Carotid Endarterectomy
Woo-Sung Yun,Dong-Ik Kim,Kyung-Bok Lee,Ui-Jun Park,Young-Wook Kim,Gyeong-Moon Kim,Chin-Sang Chung,Oh Young Bang,Keon-Ha Kim 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.78 No.5
Purpose: The aim of this study was to compare the short and long-term outcomes following carotid endarterectomy (CEA) with either primary closure (PC) or patch angioplasty (PAT) performed by single center vascular surgeons. Methods: Between November 1994 and March 2008, a total of 366 patients underwent 401 consecutive primary CEA procedures at our institution. We retrospectively reviewed patients’ medical records. Two vascular surgeons prefer routine PC and one vascular surgeon prefer routine patch closure using bovine pericardial patch. Postoperative neurologic complications were determined by clinical neurologists. Restenosis was defined as >50% stenosis on follow-up duplex scan. Data was analyzed to compare the early (≤30 days) and late results of CEA between PC group and PAT group. Results: The mean follow-up duration was significantly longer in the PC group than that in the PAT group (61.7 months vs. 41.2 months, P<0.001). Coronary artery disease and combined CEA with coronary artery bypass were more common in the PAT group (39% vs. 55%, P<0.002; 4% vs. 12%, P<0.004). Perioperative ipsilateral TIA/stroke rates in the PC and PAT groups were 1.5% and 0.7% (PC=4/270 vs. PAT=1/131, P=0.564). Regarding late outcomes, Kaplan-Meier analysis failed to show any difference between 2 groups on freedom from ipsilateral transient ischemic attack (TIA)/stroke, freedom from restenosis and TIA/stroke-free survival (P=0.851, P=0.232, P=0.103, log-rank test). Conclusion: Our results suggest that PC following CEA is not necessarily inferior to PAT for experienced surgeons.