VDT 作業者의 自覺症狀에 관한 調査硏究

池亨來,曺永釵,李棟培 忠南大學校 環境問題硏究所 1991 環境硏究 Vol.9 No.-

The aims of this study were to examine the relevancy between the VDT(visuall display terminal) workers subjective symptoms which are increasing rapidly and to know the factors which exert an influence on the complaints of subjective symptoms perception. A questionnaire survey was conducted among 464 VDT workers and 312 control group workers from December 1, 1990 to February 28, 1991. The total 26 subjective symptoms were answered by NOTHING, SOMETIMES, and ALWAYS and groupied largely into eye symptom(8 items), musculoskeletal symptom(7 items) and psychoneurotic symptom(11 items). To analyze the influences of factors related to the subjective symptom, the auther allocated score 0 for the answer "nothing", score 1 for the answer "sometimes", and score 2 for the answer "always", Following conclusions were obtained. The proportion of complaints of subjective symptoms in VDT group was 62.7%, but that was 45.6% in control group. The major symptoms, complained, were eye strain(95.9%), fatigue(93.8%), shoulders or neck stiffness (89.0%), conjunctival injection(72.6%), low back pain(72.0%), sore eye(68.8%), pain in arms(63.1%) and blurring of distance(58.4%) in that order. The main score of psychoneurotic symptom was highest in both sexes. That was 6.49 in males and 7.87 in females. Only the mean score of musculoskeletal symptoms were highest in female group. The mean score of eye symptom was highet in over 40 age group but that of musculoskeletal symptoms was highest in the 30's age groups. The mean score of eye strain was highest among personal computer worker, but that of musculoskeletal symptom were highest among computer trade worker in the bank. The factors influenced to the amblyopia were work career, type of using VDT, hours of VDT working per a day, and using of a protective lenses. The mean scores of symptoms became increased with the average working hours per a day. Total years of VDT working and the mean score of subjective syptom showed positive correlation but age showed negative correlation with mean scores of subjective symptoms.

부신피질 기능저하증에 대한 치료 1례

김지은,박형진,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2011 動物醫科學硏究誌 Vol.18 No.1

A 11-year-old castrated mongrel dog with the hypoadrenocorticism was referred to the Veterinary Medical Teaching Hospital of Chungnam National University. Hypoadrenocorticism was diagnosed by the clinical signs, the physical examination, laboratory examinations(complete blood count, serum chemistry), ACTH stimulation test and radiography. Clinical signs were improved after fludrocortisone treatment on the basis of ACTH stiluation test.

危險事業에 대한 차입재원의 최적배분원리의 도출

金知瀅 漢陽大學校 産業經營硏究所 1991 産業經營硏究 Vol.3 No.-

상부요로에 있어서 방사선 검사상 보이는 충만 결손에 대한 고찰

김형지 단국대학교 1998 論文集 Vol.33 No.-

Purpose : The problem of differential diagnosis of radiolucent filling defects in the upper urinary tract has long been a challenge for urologist. Radiolucent calculi, blood clots and malignent tumor are usually considered in the differential diagnosis. And so various diagnostic methods were used to distinguish them, including intravenous urography, retrograde pyelography, ultrasonography, computed tomography and/or ureterorenoscopy. Materials and methods: 68 cases with radiolucent filling defects on intravenous urography and/or retrograde pyelography were evaluated retrospectively for exact diagnosis. Results: The size and shape of filling defects were variable and not typical. The locations of filling effects were pelvicaliceal system in 26 cases and ureter in 42 cases, especially lower ureter in 21 cases. Among diagnostic methods, computerized tomography was used most frequently and ureterorenoscopy in 11 cases. Ureterorenoscopy was used for accurate diagnosis mainly when other studies were not definite, and in 3 cases, urothelial tumor were identified through ureterorenoscopic biopsy. The causes o filling defects were the radiolucent stone in 27 cases, soft tissue masses related to tumors in 14 cases, benigh ureteral stricture in 7 cases and blood clots in 5 cases, etc. Conclusion: When the radiographic filling defects are seen in the upper urinary tract, all diagnostic methods should be focused to diagnosis of the malignancy as possible, and if needed, the urologic endoscopy be used through invasive.

음낭외상시 초음파 촬영술의 유용성

김형지,진정환,이해원,이길호 대한응급의학회 2000 대한응급의학회지 Vol.11 No.3

Background: Testicular rupture is a surgical emergency which command immediate repair. If surgery is delayd, a hematoma causes severe pain and loss of spermatogenesis as well as hormonal functions. Scrotal ultrasonography has been helpful in early diagnosis of testicular rupture. But disadvantage of ultrasonography include a relatively low signal-to-noise level, tissue nonspecificity, lack of contrast media, a small field of view, and dependence on the operators skill and the patients physique. Also the diagnostic accuracy, sensitivity or specificity of scrotal ultrasonography was variable in regard to authors. And so, a diagnostic accuracy of scrotal ultrasonography was evaluated in scrotal trauma. Methods·. We reviewed 38 patients of scrotal trauma from May, 1994 to March, 1998. 6 patients were treated conservatively fellowing sonography and 10 patients treated only surgical exploration without ultasonography Surgical exploration was performed in 22 case, which were evaluated by ultasound before surgical treatment. In a such 22 cases, diagnostic accuracy of scrotal ultasonography was evaluated. Results: We compared ultrasound before treatment with surgical exploration finding in a such 22 cases. The ultrasonographic features in 7(31.8%) out of 22 cases, which showed testicular ruptured, but surgical exploration revealed testicular rupture in5 and epididymal rupture in 1, simple hematocele in 1. In 15(68.2%) out of 22cases the simple hematocele was diagnosed by ultrasonography, but surgical finding feature in of the 7 cases revealed testicular rupture, epididymal rupture in 1, simple hematocele in 7. The sensitivity and specificity for the ultrasonography are 42.9% and 87.5%, and the positive and negative predictive values are 86.5%and 46.7%, respectively. Ultrasonography is low sensitive in identifying testicular rupture. Conclusion: 7trasonography include a relatively low signal-to-noise level, tissue nonspecificity, lack of contrast media, a small field of view, and dependence on the operators skill and the patients physique. Therefore, early surgical exploration for saving the testis should be performed that sonographically by seeing hypoehoic peripheral lesions and disappearance of normal ovoid form of testis, hematocele in scrotal sac.

Capacitated Minimum Spanning Tree 문제를 위한 쌍대기반 해법

김형욱,노형봉,지원철 한국경영과학회 1989 한국경영과학회 학술대회논문집 Vol.- No.1

We develop a dual-based procedure for solving the capacitated minimum spanning tree problem (CMSTP). Dual ascent procedure generates a good feasible solution to the dual of the linear programming relaxation of CMSTP. A feasible primal solution to CMSTP can then be constructed based on this solution. The procedure can be used either as a stand-alone heuristic or, else, it can be incorporated into a branch and bound algorithm. A numerical result is given with quite favorable results.

Bezier Spline을 이용한 용접 로봇의 새로운 Weaving Motion 궤적 생성 알고리즘

정원지,김대영,서영교,홍형표,홍대선 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.3

In this paper, we propose a new weaving trajectory algorithm for the are welding of a articulated manipulator. The algorithm uses the theory of Bezier spline. We make a comparison between the conventional algorithms using Catmull-Rom curve and the new algorithms using Bezier spline. The proposed algorithm has been evaluated based on the MATLAB environment in order to illustrate its good performance. Through simulations, the proposed algorithm can result in high-speed and flexible weaving trajectory planning so that it s trajectory cannot penetrate into a base metal compared to the conventional algorithm using Catmull-Rom curve.

枸杞 Lycium chinense Miller의 果實이 實驗的 糖尿에 미치는 影響

李珩九,姜孝信,鄭址昌 中央醫學社 1975 中央醫學 Vol.28 No.6

The influence of fruit of Lycium chinense Miller on the blood sugar levels and serum transaminase (SGP-T, SGO-T) activities from alloxan-diabetic rabbits were observed. The Lycii Fructus were extracted with methanol, and the extracted sample was orally administrated to normal and alloxan diabetic rabbits. As for the blood sugar levels and serum transaminase activities of normal rabbits no significant variation were detected by administration of the extracted sample. The blood sugar levels and serum transaminase activity of normal rabbits were significantly increased by administration of the alloxan. The increased blood sugar levels of 'the alloxan-diabetic rabbits were gradually decreased by administration of the extracted samples, and were returned to the control levels after 12 day. The increased transaminase activities in serum of the alloxan-diabetic rabbits were significantly decreased after 96 hours. According to the above results, it would be concluded that the extract of Lycii Fructus influences for the recovery of the increased amount of blood sugar levels and serum transaminase activities by alloxan.

척수 손상으로 발생된 신경인성 방광 환자의 요역동학 검사상 고위험 인자 분석

김형지,송인호,이근호 단국대학교 1998 論文集 Vol.32 No.-

Purpose : Spinal cord injury is one of the most devastating states of infirmity encountered by today's health care professional. Historically, urologic complication have been the major source of morbidity and mortality among spinal cord injury patients. The main objective in management of neuropathic bladder is the preservation of renal function because the renal deterioration is the most serious problem of neuropathic bladder. We investigated risk factors for renal dysfunction in neuropathic bladder from spinal cord injury. Materials and methods : A total 36 spinal cord injury patients of neuropathic bladder with voiding dysfunction was evaluated by urodynamic study and we analyzed the risk factors associated with upper urinary tract deterioration. Results : In cases of spinal cord injury, detrusor external sphincter dyssynergia and high detrusor pressure were risk factors of upper tract deterioration. Conclusions : In management of neuropathic bladder, the abnormalities of individual lesion-specific urodynamic parameters(detrusor sphincter dyssynergia, low compliance, high detrusor pressure) should be factored into the assessment of upper urinary tract deterioration.

전신성 색전증으로 발현된 감염성 심내막염 3례

김지수,박대균,박경창,홍경순,두영철,한규록,오동진,유규형,임종윤,고영박,이광학,이영 대한순환기학회 1999 Korean Circulation Journal Vol.29 No.8