경쟁력 확보를 위한 중소기업의 정보화 추진방안 : T 산업의 사례를 중심으로

권태윤,김은수 경운대학교 산업기술연구소 1999 産業技術硏究論文誌 Vol.2 No.1

This information system review for a case T-Corporation was conducted by the Taegu-Kyungpook Regional SMBA. The three aspects of review are architecture-oriented, data-oriented and process-oriented reviews for consulting better information system planning (ISP) as well as building a methodological consideration of competitive advantages. In the final section of this paper, several critical success factors (CSFs) for a successful MIS integration were suggested and recommended.

Resin infiltration을 시행한 법랑질 초기 우식 병소의 특성

김은영,권민석,김신,정태성 大韓小兒齒科學會 2012 大韓小兒齒科學會誌 Vol.39 No.1

The concept of resin infiltration which was born in an innovative philosophy to arrest the incipient caries. However, the structural changes of resin infiltrated lesions have not yet explained completely. The liquid resin might contribute not only to maximizing the penetration but to deteriorating physical stability. This study was performed to examine some physical and histological features of resin infiltrated incipient carious lesions. With the specimen of resin infiltrated lesions, microhardness by nanoindentation in depth profile, morphology of resin tags were revealed after HCl dissolution, and degree of microleakage were assessed. The percentage of microhardness of surface layer and lesion body of untreated specimen to sound enamel was 64.6% and 24.6% respectively, while that of resin-infiltrated lesions was 72.1%, showing significant difference (p<0.05). The resin tags observed under SEM had relatively homogeneous length of 433(282~501) ㎛ on the average. Among 20 specimens for microleakage assessment, 13 specimens showed no leakage while 5 and 2 showed leakage into outer and inner half of lesion respectively. It was thought the infiltrant resin penetrates deeply and homogeneously into lesion body and improves its hardness with relatively good physical stability. 본 연구는 infiltrant resin을 침투시킨 초기 우식 병소의 특성을 평가하기 위해 법랑질의 깊이에 따른 경도를 측정하고, 병 소 내로의 레진 침투양상을 분석하며, 미세누출 정도를 관찰하여 다음의 결과를 얻었다. 건전 법랑질에 대한 초기 우식 법랑질의 경도 백분율은 표층(5~40 ㎛) 64.6%, 병소본체(60~350 ㎛) 24.6%였으며, infiltrant resin을 침투시킨 병소의 경도 백분율은 72.1%로 나타났다. 5~350 ㎛의 전 깊이에서, infiltrant resin을 침투시 킨 병소는 비처치 우식 병소보다 경도가 유의하게 높았지만 정상 법랑질에 비해서는 경도가 유의하게 낮았다(p<0.05). FESEM 관찰 결과 탈회된 법랑질 내부로 비교적 균일하게 침투한 레진 테그가 관찰되었으며, 침투깊이는 433 ㎛(282-501)로 측정되었다. 열순환 처리 후 13개의 치아에서 미세누출이 관찰되지 않았고, 5개에서 병소 외측 절반, 2개에서 병소 내측 절 반까지 미세누출이 관찰되었다.

운동부하테스트에 따른 정상혈압자의 혈압상승도가 고혈압 발병요인에 미치는 영향

권은영,김정주,고인태 경희대학교 체육대학 한국체육과학연구소 2003 體育學論文集 Vol.31 No.-

It is well established that the elevation of systolic blood pressure during exercise is the risk factor for cardiovascular diseases. The objective of this study is to examine whether the elevation of systolic blood pressure during exercise is correlated with the pathogenesis of hypotension To fulfill this objective, this study assigned 31(46.2±7.0 yr) middle-aged women to low group(n=17) and high group(n=14) according to the criteria for the classification of hypertension(JNC-VI, 1997). Following this, this study analyzed cardiovascular factors(SBP, DBP, HR, VO₂, RER) and blood components(LDLC, HDLC, TC, TG, HDLC/LDLC). The results of the present study were as follows: (1) SBP was significantly increased at resting state, at 4 minutes, at 6 minutes and at endpoint(P<.05), (2) There was significant difference between SBPmax and SBPrest(P<.05), (3) DBP was significantly increased solely at resting state SBPmax (P<.05), (4) RER was significantly increased at 10 minutes. In addition, a statistical analysis revealed that SBPmax-SBPrest was significantly correlated with age(r=0.336), SBPmax(r=0.827) and DBPmax(r=0.335). In conclusion this study indicates that the monitoring of such cardiovascular indicators as SBP, DBP, HR, VO₂ and RER is essential in health promotion in patients with obesity or normal healthy people as weil as patients with hypertension.

한국판 사건충격척도 수정판의 신뢰도 및 타당도 연구

은헌정,권태완,이선미,김태형,최말례,조수진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.3

Objectives : The present study was conducted to explore the reliability and validity of the "Impact of Event Scale-RevisedKorean version" (IES-R-K). Methods : The subjects were college students who visited a college counseling center and patients who were admitted to a general hospital and two orthopedic local clinics.Those subjects who experienced catastrophic traumatic events were tested for CAPS, BDI, STAI-I, II, and MMPI-PTSD scale. Results : The range of correlations between item-total were .45 -.89. The coefficients of internal consistency were .69 -.83, of them were the Split-half reliability was .71 and the test-retest reliability was .89, all within expected ranges. Inter-corre-lations of IES-R-K, CAPS, BDI, STAI-I, II, and MMPI-PTSD scale were high. CAPS showed the highest correlation Coef-ficient. Factor analysis indicated 4 factors in IES-R ; avoidance, hyperarousal, intrusion, and sleep problem & numbness. IES-R-K can be a useful self-rating diagnostic instrument for PTSD symptoms to be a clinical concern by using 24/25 cutoff in total score. The partial PTSD cutoff score is 17/18. Conclusion : The IES-R-K was confirmed in it's reliability and validity. IES-R-K could be applied for screening of PTSD.

기흉으로 사망한 폐 림프관평활근종증 : 1부 검례

권태정,정낙은 大韓法醫學會 2000 대한법의학회지 Vol.24 No.2

Pulmonary lymphangioleiomyomatosis is a rare disease which is defined as an abnormal proliferation of smooth muscles around lymphatics, venules, and bronchioles. The most frequent presenting complaint is dyspnea, either in conjuction with pneumothorax, chylothorax, or on exertion. Common extrapulmonary features are retroperitoneal adenopathy, tuberous sclerosis and renal angiomyolipomas. This case was a 34-year-old pregnant woman who died of pneumothorax. She had no past history of illness. At autopsy, both lungs showed honey-comb appearance, and was proven histopathologically pulmonary lymphangioleiomyomatosis. The proliferating smooth muscles were immunoreactive for alpha-smooth muscle actin and HMB-45. Multiple angiomyolipomas of left kidney coexisted. However, no stigmata of tuberous sclerosis was present. Pregnancy was thought to aggravate her clinical course.

어린 가토에서 자가 연골 이식후 연골성장에 관한 실험적 연구

권택근,김태연,정전은,이동진 대한성형외과학회 1992 Archives of Plastic Surgery Vol.19 No.3

Does free transplanted autologous cartilage grow? Until now many autors have published different results about the growth potential of cartilage. Some authors have produced in their study that transplanted cartilages were able to grow, but others showed contradicting results. In this study, authors obtained cartilages from young rabbits'ear, 10 by 10mm in size and divided them into two groups ; the first group was cartilages with perichondrium and the second group was cartilages stripped perichondrium. We transplanted both groups of cartilages in the posterior nuchal area of rabbits. Then numbers of specimens of each group were evaluated and compared for assessment of cartilage growth. After observaton for six months, we took the cartilages from the posterior nuchal area and examined the surface area, the thickness, and the weight and finally confirmed the growth potential of the cartilage by histologic study. The results are as follows : 1, The surface area, the thickness, and the width of the transplanted cartilages were increased significantly in gross specimens and their measured values were statistically significant and cartilages with perichondrium showed more growth than cartilages stripped perichondrium 2. In histologic studies, we observed increased surface activities with numerous proliferatng cells and found no abnormal features compared with normal cartilages. Cartilages with pericondrium were thicker than cartilages with stripped perichondrium

Stented Graft의 임상경험

권태원,김호성,김도균,성규보,조용필,김건언 대한혈관외과학회 2000 Vascular Specialist International Vol.16 No.2

Purpose: Endovascular repair is a alternative treatment with favorable short-term result, but long term results are not available compared to standard operation. The authors have reviewed experiences of Asan Medical Center on stented graft, performed from Aug. 1998 to Feb. 2000, and the results as to age, operative indication, clinical condition, anatomic location, complication, follow-up are reported. Method: Seven patients who has received stented graft between Aug. 1998 and Feb. 2000 are reviewed retrospectively. Result: Of the seven patients, 6 were male and 1 was female. The mean age was 46.4 years (17~71). Indication for stented graft were two pseudoaneurysms, two iatrogenic arterio-venous fistulas, one thoracic aorta aneurysm, one abdominal aortic aneurysm, and one iliac artery occlusion with blue toe syndrome. Three different types of stented graft devices were utilized: Dacron-covered nitinol stented graft (made by the Asan Medical Center medical device team), Vanguard II (by Boston Scientific Corp.), and PTFE with nitinol stented graft (by Tae-woong). There was no perioperative mortality, and the technical success was achieved in five cases (71%). The patency at 14-month were 1009o (5/5). Two immediate complications are hemorrhage due to iliac & femoral artery avulsion requiring emergency bypass grafting, and deployment failure of stented graft requiring removal of retained graft device. Conclusion: Stented graft may be utilized even in complicated vascular situation but will need further development of device and more experience to prevent possible catastrophic complication. Indication should be decided by team approach and vascular surgeon should be prevent or participate during the procedure.

알코올성 치매의 신경심리학적 소견

김태유,김지원,김상윤,김준모,이동기,연권인,김민정,이은아,손정은 대한노인병학회 2004 대한노인병학회지 Vol.8 No.1

중학교 화학 분야의 개념 연구에 대한 문제점 분석

朴恩姬,姜대勳,白盛惠,朴國泰,金惠敬,蔡禹기,權鈞 한국교원대학교 과학교육연구소 1999 청람과학교육연구논총 Vol.9 No.1

중학교 화학 분야의 오개념 조사에 사용된 설문지의 문제점을 밝혀, 학생들의 정확한 오개념 조사를 위한 바탕을 마련하고자 한다. 기존의 중학교 화학 분야에 대한 오개념 조사 설문지가 연구 대상 학생들에게 잘못 사용되고 있었으며, 문항 내용 자체에도 오류가 있었음을 지적하고자 하는 것이다. 선행 연구들의 분석 결과들이 오개념이 아니라 무개념임을 확인하기 위하여 중학교 1학년 학생 182명을 대상으로 두 종류의 설문지 A와 B를 투입하여 조사하였다. 설문지 A는 오개념 연구를 위해 선행 연구들에서 사용한 문항들로 이루어진 것으로, 이를 투입한 결과를 선행 연구들의 결과들과 비교하기 위한 것이다. 그리고 설문지 B는 설문지 A에서 응답한 학생들의 구체적인 생각을 알아보기 위하여 새롭게 개발한 것이다. 설문지 A를 통해 얻은 결과와 선행 연구들에서 얻은 결과들을 비교할 때, 전반적으로 일관성이 없게 나타났으며, 중학교 1학년 학생들의 주관식 정답률이 객관식 정답률에 비해 매우 낮게 나타나는 공통점은 있었으나, 문항 자체의 오류들이 발견되었다. 설문지 B를 통해 학생들의 생각을 알아본 결과, 설문지 A에서 과학적 개념과 오개념으로 분류된 학생들 중에서 무개념으로 판단된 경우가 많았다. This study was to clarify the problems of questionnaires related to misconception researches of middle school chemistry and to prepare a ground for the correct misconception research for students. For these purposes, the questionnaires of the misconception researches related to chemistry in middle school were analyzed, and the mistakes of the questions which were used in 7th grade students were found, based on a definition of misconceptions in this study. Also, the errors in contents of the questionnaires were indicated. The results of the analysis revealed that most of the 7th grade students did not have misconceptions contrary to some of the previous researches conclusions. They only had no conceptions related to the contents. In order to support this analysis, two different questionnaire sets (questionnaire set A and B) for 182 7th grade students were used. After obtaining similar results to those of the previous researches by the questionnaire set A, the students' thoughts were examined by the questionnaire set B. From the results of this study, the correct answer rates of subjective questions were very low compared with those of objective questions in the questionnaire set A for 7th grade students. It was hard to find consistency among the results of the researches using the questionnaire set A. And many contents of the questions consisted of the questionnaire set A were not consisted with a definition of misconceptions. There were errors in the contents of the questions, too. The students classified as the having-science-concepts group and the having-misconceptions group by the questionnaire set A were classified as the having-no-concepts group by the questionnaire set B.

시간지연 시스템에 대한 출력궤한 H∞ 제어

정은태,김성미,권성하 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-

This paper presents an H∞controller design method for linear time-invariant systems with delayed state and control. Using the second method of Lyapunov, the stability for delayed systems is discussed. For delayed systems, we derive a sufficient condition of the bounded real lemma(BRL)which is similar to BRL for nondelayed systems. And the sufficient conditions for the existence of an output feedback H∞controller of any order are given in terms of three linear matrix inequalities(LMIs). Futhermore, we briefly explain how to construct such controllers from the positive definite solutions of their LMIs and give a simple example to illustrate the validity of the proposed design procedure.