지방대학 신입생들의 학업중단 영향요인간 구조적 관계 분석

남민우(Nam, Min-Woo),이해듬(Lee, Hae-Deum),백은주(Baik, Eun-Joo) 순천향대학교 인문학연구소 2016 순천향 인문과학논총 Vol.35 No.4

이 연구는 지방대학 신입생들을 대상으로 학업중단 영향요인간 구조적 관계를 분석하는 것을 목적으로 하였다. 이 연구를 위하여 학업중단에 영향을 미치는 내생변인으로 대학 만족도, 대학생활 적응도를 설정하였고, 가정생활ㆍ경제수준, 학 업적 자기효능감, 전공 적성 및 진로 부합도, 교수와의 상호작용성, 전공의 취업전망도를 외생변인으로 하는 연구 모델을 설정하였다. 지방소재 대학의 신입생 627명을 대상으로 설문자료를 수집하였으며, 연구 모델에 포함된 요인들의 상관 관계 매트릭스를 LISREL에 삽입하여 구조방정식 모델 분석을 수행하였다. 이 연구의 주요 연구결과를 요약하면 다음과 같다. 첫째, 이 연구에서 제시된 구조방정식 모델의 전반적 적합도 검증 결과는 RMSEA=.058, RMR=.048, GFI=.894, AGFI=.868, CFI=.927, IFI=.927, CN=244.91 등으로 분석되어 모델의 적합도는 양호하였다. 둘째, 구조방정식 모델에서 관계성을 분석한 결과 지방대학 신입생들의 학업중단 의도에 대해 대학 만족도, 대학생활 적응도, 전공 적성 및 진로 부합도, 학업적 자기효능감, 교수와의 상호작용성이 유의한 영향을 미치는 것으로 나타났다. 대학 만족도에는 전공 적성 및 진로 부합도, 교수와의 상호작용성이, 대학생활 적응도에는 대학 만족도, 학업적 자기효능감, 교수와의 상호작용성이 유의미한 직접효과가 있는 것으로 분석되었다. 결국 모델의 변인 간 직접ㆍ간접효과와 경로 관계를 분석한 결과 대학 만족도, 대학생활 적응도, 전공 적성 및 진로부합도, 교수와의 상호작용성이 학업중단의 영향요인 간 관계에서 핵심변인으로분석되었다. The study purpose was to identify what factors affect academic dropout intention of local university freshmen. A sample of 627 university freshmen participated in the research. According to the goodness-of-fit test results (RMSEA=.058, RMR=.048, GFI=.894, AGFI=.868, CFI=.927, IFI=.927, CN=244.91), the model turned out to be good enough to conduct the research. It was identified that university satisfaction, adaptability to university life, academic self-efficacy, major fitness/career relation, and professor-student interaction were significantly related to academic dropout intention. In terms of direct effect result, university satisfaction, academic self-efficacy and professor-student interaction had significant relationships with adaptability to university life. The study result also confirmed that university satisfaction was influenced by major fitness/career relation, professor-student interaction. Finally, university satisfaction, adaptability to university life, major fitness/career relation, and professor-student interaction were identified as key variable through their direct and indirect effect on academic dropout intention of local university freshmen.

지방대학 신입생들의 학업중단 예측도구 타당화

백은주,남민우,이해듬,Baik. Eun-Joo,Nam. Min-Woo,Lee. Hae-Deum 순천향대학교 인문학연구소 2015 순천향 인문과학논총 Vol.34 No.2

이 연구는 지방대학 신입생들에게 맞춤형으로 적용할 수 있는 학업중단 예측 도구의 타당성을 검증하는 것을 목적으로 한다. 이를 위해 학업중단 영향요인과 관련한 선행연구들을 심층 분석하여 다양한 변인들과 하위문항을 구성하였고, 도구의 타당화를 체계적으로 검증하였다. 선행연구 고찰과 전문가 내용타당도 검증을 통해 구성된 학업중단 예측도구를 지방대학 신입생 627명을 대상으로 자료를 수집하였다. 이 연구의 주요 연구결과를 요약하면 다음과 같다. 지방대학 신입생 들의 학업중단 예측도구는 가정환경ㆍ경제수준(4문항), 학업적 자기효능감(3문항),전공의 적성 및 진로 부합도(5문항), 교수와의 상호작용(3문항), 전공의 취업전망 도(3문항), 대학생활 적응도(5문항), 대학만족도(3문항)로 총 7개 요인, 26개 문항으로 최종 구성되었다. 최종 척도에 대한 신뢰도 검증을 위해서 내적합치도를 산출하였고, 측정모델을 활용한 확인적 요인분석을 통해 구인타당도를 검증하였다. 전반적인 분석결과는 본 학업중단 예측도구가 지방대학 신입생들의 학업중단 영향요인을 측정하는데 비교적 신뢰롭고, 타당한 도구로 활용될 수 있음을 보여 주었다. The purpose of this study was to conduct an in-depth analysis of previous studies related to causing factors of academic dropouts, construct various factors and sub-questions for a customized tool for the local university students, then lastly, systamatically verify the tool’s validity. The academic dropout prediction tool which was constructed by looking into previous studies and going through expert’s content validity test was used to collect data from 627 local university freshmen. The summary of the main results of this study came out as follows. The exploratory factor analysis resulted in 26 questions composed of 7 factors: home environment/economic standard(4 items), academic self-efficacy(3 items), major fitness/career relation(5 items), professor-student interaction (3 items), their current major’s possibility of employment(3 items), adaptability to university life (5 items), university satisfaction (3 items). For the varification of the final criterion, the internal consistancy was calculated, and through confirmatory factor analysis, the construct validity was confirmed. The overall analysis confirmed that the prediction tool was congruent and valid when measuring the factors that causes local university freshmens’ dropping out of their academic studies.

임상 : 앞머리쪽우묵 및 안장옆 부위의 종양에 대한 눈썹절개를 통한 눈확위 접근법

백병석 ( Byung Suck Baik ),조광욱 ( Kwang Wook Jo ),김영우 ( Young Woo Kim ),김상돈 ( Sang Don Kim ),박익성 ( Ik Seong Park ),백민우 ( Min Woo Baik ) 대한뇌종양학회 2008 대한뇌종양학회지 Vol.7 No.2

Objectives:Keyhole surgery through supraorbital route with eyebrow incision is minimal invasive technique for anterior cranial fossa pathology. Traditional method need to remove supraorbital rim, result in postoperative ecchymosis around eye. The authors performed surgery without removal of supraorbital rim and want to introduce the surgical technique and results. Methods:Among the patients who were found to have the tumor in the anterior cranial fossa and parasellar area, 9 patients were operated by supraorbital approach. There are 2 tuberculum sellar meningiomas, 3 anterior skull base meningiomas, 1 parasellar cavernous hemangioma, 1 Rathke`s cleft cyst, 1 metastatic tumor and 1 optic glioma. Skin incision was made along lateral two third of eyebrow. Small size craniotomy was made just upper part of supraorbital rim. The opening size was 1.5×2.5 cm. Next technique is almost same with traditional supraorbral approach. The surgical results were studied retrospectively. Results:Largest tumor was 4×5×5 cm in size. Gross total removal was possible in all the patients. There was no surgical mortality and imaging study showed no surgical complication without one case. One patient suffered from hypothalamic dysfunction and sustained moderately disabled state for 6 months but the others showed excellent outcome(modified Rankin Score 0 to 1). The average postoperative hospital day was 9.6 days except 1 patient. All patients were satisfied with cosmetic results. Short Form-36® health survey showed excellent self estimation after surgery. Conclusion:Minimal invasive approach through eyebrow incision can achieve same results like conventional craniotomy in selected case. Supraorbital rim removal is not an obligation during this procedure.

경막 성형술과 단락술로 치료한 외상성 척수 공동증 - 증례보고 -

오윤규,최영근,이강운,고원일,박익성,백민우,강준기,Oh, Yuun Kyu,Choi, Young Geun,Lee, Kang Woon,Ko, Won Il,Park, Ik Sung,Baik, Min Woo,Kang, Joon Ki 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.10

A case report of a post-traumatic syringomyelia in a 29-year old male, developed 15 years after an L1 burst fracture, is presented. On preoperative MRI, the syrinx extended cephalad above the fracture site through the whole thoracic and cervical cord. Serial myelo-CT was performed to evaluate the dynamics of CSF. It was managed by lysis of the arachnoid adhesions, syringosubarachnoid shunt, and expansile duraplasty. After surgery, the patient's symptoms improved, and marked decrease of the syrinx was seen on postoperative MRI. The pathophysiology, the role of preoperative diagnostic methods especially serial myelo-CT, and the contmporary management modalities for posttraumatic syringomyelia is reviewed along with the pertinent literature.

뇌기저부 종양제거 수술후 발생한 척추동맥의 거대가성동맥류 -증례보고-

홍현진 ( Hyun Jin Hong ),박익성 ( Ik Seong Park ),백민우 ( Min Woo Baik ),조광욱 ( Kwang Wook Jo ) 대한뇌종양학회·대한신경종양학회·대한소아뇌종양학회 2011 대한뇌종양학회지 Vol.10 No.2

A 33-year-old man initially presented with posterior neck swelling. He subsequently underwent removal of a brain stem tumor via a far lateral transcondylar approach four weeks prior to representation due to complications. A giant aneurysm originating from the extracranial vertebral artery was identified via digital subtraction angiography (DSA). Due to subsequent surgical exploration on the high cervical area, a pseudoaneurysm was found in it. In this paper, we describe the clinical presentation and treatment of this post-operative complication of a posterior fossa skull base approach.

고양이의 급성기 뇌지주막하출혈시 뇌혈류 변화에 대한 Naloxone 효과

백민우,강준기,박춘근,김영,조태훈,정철구,윤석훈,김달수,송진언 대한신경외과학회 1987 Journal of Korean neurosurgical society Vol.16 No.1

The immediate fall in cerebral blood flow(CBF) and the early clinical picture following subarachnoid hemorrhage (SAH) correlate well with the prognosis of most of the patients. But the cause of this fall in CBF is not fully understood. Recently attention has been focused on the role of endogenous opiates in the pathogenesis of cerebral ischemia. This research was planned to observe the acute change of regional cerebral blood flow (CBF) in experimentally induced SAH, to investigate whether endogenous opiate plays a role in the mechanism of the acute reduction in CBF following SAH, and to document the therapeutic value of naloxone. We have studied the effects of naloxone, an opiate antagonist, on CBF, cardiovascular system, intracranial pressure (ICP) and electroencephalography (EEG) in pentobarbital anesthetized cats. Twenty-five adult cats were divided into four groups as follows: control group(group Ⅰ; 5 cats), naloxone-treated control group (group Ⅱ; 5 cats), SAH group (group Ⅲ; 7 cats) and naloxone-treated SAH group (group Ⅳ, 8 cats). The measurement of CBF was done by hydrogen clearance methods, and carried out every 20 minutes from the beginning to 140 minutes following SAH. Naloxone (10 ㎎/㎏) was intravenously administered to cats, three times: 40, 80 and 120 minutes following SAH. The results were as follows: 1) We have induced SAH in 18 cats, in which 15 cats showed the immediate reduction in CBF following SAH( incidence rate: 83%). 2) Significant elevations in the mean arterial blood pressure (MABP: 141±10.7 to 146±12.3㎜Hg) and ICP(19±35 to 21±3.9㎜Hg) were observed immediately after SAH, followed by reduction respectively to the levels of baseline value within 40 minutes after SAH. Naloxone had no significant influence on the changes in MABP and ICP. 3) Baseline values of CBF in group Ⅰ and Ⅱ were 445±6.9 to 50,l±5.4㎖/100g/min, and were not changed by naloxone. 4) Induction of SAH resulted in a significant reduction of blood flow to 34.8±5.9 to 38.4±5.6㎖/100g/min(p<0.005), and the reduced value was not significantly changed through the experiment. Reduction in CBF was usually greater on the side of the lesion. 5) In group Ⅳ, the initial administration of naloxone made the reduced CBF increase to about 46㎖/100g/min(p<0.05), and the increased CBF value was maintained by the additional injections of naloxone. 6) Cats subjected to SAH exhibited progressive loss of amplitude and decreased frequency in EEG, which were improved by the administration of naloxone. These data suggest that endogenous opiate, which may cause decrease of cerebral metabolic rate and vasoconstriction, can play an important role in the mechanism of the acute reduction in CBF following SAH. Naloxone may induce increase in CBF by reversing the effects of endogenous opiate and its direct cerebral vasodilat or properties.

급성 뇌허혈증에 있어 만니톨의 효과에 대한 실험적 연구

조경석,홍용길,백민우,김달수,강준기,최창락 대한신경외과학회 1994 Journal of Korean neurosurgical society Vol.23 No.8

The development of postischemic irreversible brain damage depends upon the length of ischemia and its severity during arterial occlusion, although release of the occlusion always leads to restoration of normal or above n o d cerebral blood flow. This experiment was planned to determine the effects of mannitol on cerebral ischemia on subsequential izgional cerebral blood flow(rCBF) and somatosensory evoked potential(SEP) following reperfusion after ischemia and also define the proper time of vascular occlusion without irreversible brain damage. Cerebral ischemia was induced in cat by transorbital occlusion of the left MCA with a Sugita clip for period of 30 minutes and the ischemic brain was reperfused for 180 minutes by removing the clip. Foty adult cats, weighing 25 to 4.0㎏ were divided into 5 groups : control(Gmup Ⅰ, n=8), permanent MCA occlusion(Group Ⅱ, n= 8), permanent MCA occlusion with mannitol infusion (Group Ⅲ, n=8), permanent MCA occlusion with mannitol infUsion(Group Ⅲ, n=8), 30 minutes MCA clipping followed by reperfusion(Gmup Ⅳ, n= 8) and 30 minutes MCA clipping with mannitol infusion followed by reperfusion groups((group Ⅴ, n=8) respedvely. The rCBF and SEP measurents were carried out in each animal immediately, after MCA occlusion, at 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes and 180 minues followed by reperfusion. The rCBF was measured by the hydrogen clearance technique. Mando1 was given in bolus of l a g body weight as a 25% solution delivered via the femoral vein The results were as follows: 1) Gradual elevation of intracranial pressure(1CP) and systolic blood pressure were observed after MCA occlusion. Treatment with mannitol in MCA occlusion animals(Group Ⅲ & Ⅴ) decreased ICP immediately a k r idusion of mannitol. 2) Normal control rCBF(ml/100g/min) were 51.94±5.05 in the left temporal(LT) and 50.80± 4.87 in the left perietal lobes(LP). 3) The MCA occlusion resulted in a reduction of the blood flows to 72% of the normal control ones(LT : 14.29± 4.81ml/100g/min) at the left temporal area immediately after occlusion and also a reduction of flows to 80.4% of the normal control ones(LT : 1024± 3.69ml/100g/min) at 180 minutes after occlusion in Group Ⅱ. 4) In the mannitol-treated group(group Ⅳ), reperfwd animals, with removal of the clip on MCA had an improved postischemic recovely of blood flow and ipsilateral cerebral blood flows were restored to 42.5% of the normal control ones(LP : 212±4.13ml/100g/min) at 180 minutes after occlusion in Lt parietal CBF. 5 ) In the reperfusion group(group Ⅳ), reperfused animals, with removal of the clip on MCA had an increase in rCBF to the level of 833% of the control value(LT : 45.78± 6.80ml/100g/min) at 180 minutes after reperfusion and also reperfused animals, with treated mannitol had further increase the blood flow up to the level of 92s % of the control value(LT : 49.04± 43.6 ml/100g/min) at 180 minutes after repexfwion. 6) After the MCA occlusion, the SEP was present but markedly altered in shape and particularly the early components of the SEP were suppressed in the ipsilateral occlusion hemisphere. 7) In the mannitol-treated reperfusion group(Group Ⅴ) the amplitude of the SEP was restored to 80% of control value. The SEP was significantly suppressed if the rCBF fell below 10- 14ml/100g/min. These results suggest that provided CBF can be restored to above the 40% threshold well within 30 minutes, prevention of ischemic brain damage can be expected and also the mannitol may of benefit in prolongation of the time threshold for the formation of the cerebral ischemia after vessel occlusion.

총경동맥 폐쇄시간에 따르는 국소 뇌혈류 변화 : 실험적 연구 An Experimental Cat Model

강준기,성태경,조병일,백민우,김문찬,허춘웅,하영수,송진언 대한신경외과학회 1983 Journal of Korean neurosurgical society Vol.12 No.3

The microvasculature of the brain is also quite susceptible to ischemic insult, and substantial portions of the brain are not reperfused after restoration of the blood supply following overtime of critical ischemic periods. The purpose of this series of experiments was to determine the effects of ischemia on subsequential regional cerebral blood flow measurements and cortical electric activities following reperfusion after ischemia and also to define the proper time of vascular occlusion without irreversible neural damage. Cerebral ischemia was induced in cat by bilateral common carotid occlusions for periods of 10, 30, to 60 minutes, and the blood supply was reperfused for 3 hours after clamp-off. Regional cerebral blood flow(rCBF) was measured by hydrogen clearance technique following ischemia, restoration of blood supply and electroencephalogram recovery could be predicted according to the rCBF. Forty adult cats weighing 2.7 to 4.0㎏ were used in this study. The animals were divided into 4 groups of 10 cats each : normal control, 10 min-clamped, 30 min-clamped, and 60 min-clamped groups. The results obtained were as follows : 1) The mean rCBF was 24.6±7.0㎖/100g/min in control group. 2) Bilateral carotid occlusions resulted in a reduction of the rCBF(12.4±4.1㎖/100g/min) to 50% of control flow on both hemispheres. 3) Sequential changes of the rCBF after reperfusion : (1) There was restored the rCBF(21.3±5.1㎖/100g/min) to control flow in the 10 minutes-clamped group. (2) There was a 85% recovery of control flow in the 30 minutes-clamped group. (3) There was a only 25% recovery of control flow in the 60 minutes-clamped group. 4) A close correlation was found between cortical electrical activity and rCBF suggesting a threshold relationship. (1) The changes of cortical electric activity began to notice at rCBF less than 17.4±4.7㎖/100g/min. (2) The recovery of cortical electric activity noted at rCBF more than 10.2±2.3㎖/100g/min. 5) There was no evidence of ischemic involvement at the cortex, white matter and basal ganglia in the 10 minutes clamped group, but demonstrated a dense wedge shaped infarct at the cortex and uncus herniation in the 60 minutes clamped group. The rCBF and cortical electric activity restored to normal values in reperfusion within 10 minutes after occlusion of both common carotid arteries.

전교통 동맥류의 분류와 수술을 시행한 135 예에 대한 임상보고

백민우,김달수,김영,박춘근,김문찬,이상원,조태훈,조병일,이재수,윤석훈,하영수,강준기,송진언 대한신경외과학회 1986 Journal of Korean neurosurgical society Vol.15 No.1

During the 10-year period up to December 1984, 176 patients with anterior communicating aneurysm (ACOMA) among total 467 patients of intracranial aneurysms were admitted to this Catholic Medical Center. Of these, 135 cases of ACOMA were operated by direct intracranial procedures. To analyse the factors influencing the mortality involving in surgery of 135 patients with ACOMA, a classification of ACOMA was attempted. The origins and projections of aneurysms, anatomical variations were analysed with the aid of angiography, intraoperative findings and intraoperative photographs which permitted the establishment of a classification of ACOMA with their direction. Our classification of operated 135 cases of ACOMA are seven types: 32 anterior(23.7%), 30 anterior-rostral(22.2%), 42 anterior-caudal (31.1%), 3 posterior(2.2%), 18 posterior-rostral(13.4%), 4 posteriorcaudal (3.0%), caudal 6(4.4%), respectively. Most of ACOMA projecting anteriorly, anterio-rostrally were situated above or between the optic nerve, and the less frequent posterior-caudal and inferior aneurysms were in close proximity to hypothalamic branches of the anterior communicating artery and A₂ segment. There was on overall operative mortality of 6%. The surgical morbidity and mortality were significantly higher in the posteriorly projecting group, garticulary in the posterior-caudal direction. In direct surgery of ACOMA, subpial resection of the gyrus rectus was sffective for not only anteriorly, but also posteriorly directing aneurysms.

척수인견에 의한 국소 척수혈류 변화 : 실험적 연구 An Experimental Cat Model

백민우,이재수,박춘근,조태훈,하영수,김문찬,강준기,송진언 대한신경외과학회 1984 Journal of Korean neurosurgical society Vol.13 No.3

The tethered cord syndrome is a clinical entity manifested by progressive motor and sensory changes in the legs, incontinence, back or leg pain, and scoliosis in young children. Based on remarkable neurological improvement after release of cord tension by sectioning the filum, it might be concluded that the neurological deficit was effected by cord tethering. The main objective of this experiments was to elucidate the pathophysiology involved in the tethere cord by observing the effect of tethered cord on regional spinal cord blood flow (rSCBF) and somatosensory evoked potentials (SEPs) and define a threshold relationship between SEP and rSCBF. Thirty adult cats, weighing 2.7 to 4.2kg were used in this study. The cats were divided into three groups as follows: Control group= non-tethered ( 0 cats) 5g-traction group = cord traction with 5g weight (10 cats). 10g-traction group = cord traction with 10g weight (10 cats). The rSCBF and SEP measurements were performed immediately after cord traction in each animal, at 30, 60, 90, 120 minutes and the final rSCBF at 3 hours by the hydrogen clearance technique.