FeTaN 연자성 박막을 이용한 자기 평면 인덕터 소자의 고주파 특성에 관한 연구

金充植,南勝義,韓相龍 弘益大學校 科學基術硏究所 1999 科學技術硏究論文集 Vol.10 No.2

In accordance with tendency to miniaturization and high frequency operation of electronic products, extensive efforts of miniaturizing magnetic devices such as inductors, transformers which can be applicable to the small scale power supply (DC-DC converter). To fabricate high performance inductors in small area, several important factors should be considered, such as magnetic films with good soft magnetism, induction coil with low resistance, and well-designed geometrical inductor structures. Usually, permalloy or Co-based amorphous films have been used for the soft magnetic films. However, in order to improve the inductor performance, especially for the high current applications such as DC-DC converters, a soft magnetic material with a higher saturation magnetization (4πMs) and extrinsic anisotropy field is needed. Inductor performance without any planarization process for the upper magnetic layers was far less than that expected from the theoretical calculation. Nevertheless, uniaxial magnetic anisotropy was induced to the magnetic flux direction, the soft magnetic properties and the inductor performance were degraded due to the grating topology of upper magnetic films. Glass bonding is a useful method for achieving a completely planar inductor structure. The planar inductor with glass bonding shows excellent performance: inductance(L)of 1.2 μH, figure of merit(Q) 7.5 (at 5 MHz), and the dc current capability up to 100 mA. In order to reveal the effect of anisotropy field on inductor performance, hard axis of magnetic layer was controlled as 0, 45 and 90 degree from magnetic field generated at rectangular spiral coil. Inductance is drastically decreased with increasing DC current over saturation current, and as increasing the angle miss match, the saturation current is appeared at low current.

거대첨규 콘딜로마로부터 속발된 음경암 1치험예 : A Case Report

김수현,정충식,노준,박도영,장대수 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.2

The giant condyloma or carcinoma-like condylima is relatively rare. Although the disease is considered clinically mailgant. the possiblity of maligant changes from them are controversial even among the investigators but cannot be entirely overlooked. Most authorists consider that they get the possibility of malignant change. A case of malignancy of the penis which have apparently been transformed from giant condyloma acuminatum of the penis is herein presented with review of literature.

효율적인 기업의 인트라넷 구축방안에 관한 소고

金甲植,楊天錫,李忠權 대구산업정보대학 1998 논문집 Vol.12 No.2

New technology has always carried two faces, which are the opportunity and the crisis. Intranet, recently appeared in the computing world, is being accepted as a replacement of traditional Client/Server technology. Since intranet has not been completely built even in its concept, it will give a company the crisis rather than the opportunity. To take the new opportunity for a business and organizational innovation through the intranet, its builder should necessarily acquire the knowledge of the preliminary considerations to the building. The purposes of this article are to define the concept of intranet, to investigate the cases and the building methodologies, and to discuss the preliminary considerations to the building.

Dactinomycin 이 흰쥐 橈骨의 骨端軟骨板의 基質合成에 미치는 영향

金光會,崔忠植,李圭植 한양대학교 의과대학 1986 한양의대 학술지 Vol.6 No.1

Dactinomycin, one of the antibiotic anticancer drug, is isolated from the culture media of Streptomyces chrysomallus. The flat portion of this molecule intercalates into the double-helical DNA between successive G∼C base pairs, producing a inhibition of DNA replication and RNA synthesis. Therefore, it is very effective against tumor cell proliferation but as well as may demage on the proliferating normal cells. So that, the author undertook to pursue the effect of the dactinomycin on the synthesis of the mucopolysaccharide in the chondrocyte of the epiphyseal plate. The pregnant albino rats, Wistar strain, were used as an experimental animals. The albino rats were administered with 0.2 ㎍ of dactinomycin per gram body weight at 8th day of pregnancy and its neonates were sacrificed at 1st and 3rd day of neonatal life. The specimens obtained from the radius were stained with hematoxylin-eosin to observe the morphological changes of the epiphyseal plate and stained with alcian blue (pH 2.5), alcian blue (pH 2.5)-PAS for acid and neutral mucopolysaccharide, and stained with alcian blue (pH 2.5)-0.3M MgCl₂, alcian blue (pH 1.0)-PAS, alcian blue (pH 0.4), and aldehyde fuschin (pH 1.7)-alcian blue (pH 2.5) for the sulfation of the matrix. The results were as follows: 1. The narrowing reserving zone, widened proliferating zone, and reduced number of cells in each lacuna were observed in the epiphyseal plates of the experimental groups. 2. The reduction of the acid mucopolysaccharide content was detected in the epiphyseal plate of the experimental groups. 3. The increase of the sulfated and strong sulfated mucin contents were shown in the epiphyseal plate of the experimental groups. From the results, it is assumed that dactinomycin inhibits the synthesis of the mucopolysaccharide in the epiphyseal plate of the radius and also accelerates the sulfation of the mucin.

인터넷 비즈니스에서 효과적인 소비자 관계관리(Customer Relationship Management)를 위한 데이터 마이닝 기법의 응용에 대한 연구

김충영,장남식,김상욱 한국산학경영학회 2002 산학경영연구 Vol.15 No.-

본 연구에서는 고객 세분화를 위하여 고객프로필과 사이트 접속자료를 통합, 분석하는 분석적 CRM을 시도하였다. 실제 고객 데이터를 분석하여 고객의 특성과 기호, 방문행태 등을 이해할 수 있다면 이를 기반으로 고객 세분화(segmentation)가 가능할 것이다. 예를 들어 고객의 거주지, 재산정도, 교육수준, 연령 등 진적정보를 토대로 동일 사이트에 접속하는 고객의 공통점을 찾게 된다면 이들 고객에 접근할 수 있는 적절한 마케팅 미디어가 무엇인지, 어느 페이지에 홍보ㅜㄹ을 게재하는 것이 효과적일 것인가 등을 결정하는 데 도움을 줄 수 있을 것이다. 한편 웹 기반 마이닝의 핵심은 웹으로 부터의 자료를 어떻게 하면 효율적으로 수집할 것인가, 또한 이렇게 수집된 자료를 다양한(multiple) DB와 어떻게 통합하고 분석하여 필요한 정보를 추출할 것인가 일 것이다. 본 연구에서는 실제 인터넷 사업자의 사용자 그룹의 비율에 따라 구성된 패널을 활용하여 효율적인 자료수집 방안을 모색하였다. 패널 구성원에 대한 웹 데이터를 수집함으로써 신뢰성과 대표성을 확보하면서 분석대상 자료의 양을 적절한 수준으로 유지할 수 있었다. 또한 고객자료 분석에서는 OLAP과 데이터 마이님 기법(의사결정나무)을 동시에 사용하여 그 분석 결과를 비교함으로써 각 기법의 결과를 상호 확인하고 보완할 수 있었다. 이 결과는 데이터 마이닝 기법에 의해서 발견된 패턴을 분석 하고 확인하는 작업에서 OLAP이 유용하게 사용될 수 있다는 과거 연구의 주장을 확인하였다. In this study, an analytical CRM for customer segmentation is exercised by integrating and analyzing the customer profile data and the access data to a particular web site. We believe that effective customer segmentation will be possible with a basis of the understanding of customer characteristics as well as behavior on the web. One of the critical tasks in the web data-mining is concerned with both ?how to collect the data from the web in an efficient manner??and ?how to integrate the data(mostly in a variety of types) effectively for the analysis??This study proposes a panel approach as an efficient data collection method in the web. For the customer data analysis, OLAP and a tree-structured algorithm are applied in this study. The results of the analysis with both techniques are compared, confirming the previous work which the two techniques are inter-complementary.

위암 조직에서 발현되는 새로운 유전자 Reg Ⅳ

김수령,서은영,이웅희,이증훈,이충식 충남대학교 의과대학 의학연구소 2002 충남의대잡지 Vol.29 No.2

A search for the genes expressed only in gastric cancer may help to define molecular alterations or aid in diagnosis of gastric cancer. Recently, suppression subtractive hybridization (SSH) has been used as an effective technique for detection of differentially expressed genes. We discovered a noble gene which belongs to the Reg family in stomach cancer tissue using the SSH technique. We identified and named the Reg Ⅳ gene that is highly expressed only in gastric tumor tissue. The Reg family gene has a lot of functions of the growth factor and gene regulation. The cathepsin L-12 gene, which is known to exhibit increased expression in breast cancer and some inflammatory conditions, is also expressed in stomach cancer. Expressions were verified by reverse Northern blot analysis and Northern blot analysis. We expect these genes to be used as an important tool for the diagnosis and/or understanding of the pathogenesis of gastric cancer.

Angiotensin Ⅱ 수용체 선택적 길항제 Losartan이 Spontaneously Hypertensive Rat 적출 대동맥의 수축에 미치는 영향

김춘식,한형수,김중영 慶北大學校 醫科大學 1994 慶北醫大誌 Vol.35 No.4

목적 : SHR의 장간막을 적출하여 장간막 혈관 관류를 시켰을 때 losartan을 2주간 처치한 군에서 대조군에 비해 norepinephrine을 투여하여 나타나는 관류압의 상승에 대한 전기자극에 의한 관류압의 비가 감소되어 나타났다. 이러한 현상의 원인을 검정하고자 하였다. 대상 및 방법 : SHR의 적출 대동맥에 90분 동안 losartan을 처치하였을 때 처치전후에 phenylephrine과 KCl에 의한 수축력의 차이를 비교하였다. 결과 : losartan 처치로 수축력이 감소됨을 확인하였다. 또 내피세포를 가진 대동맥 절편이 내피를 제거한 절편보다 수축력의 감소가 더 현저하게 나타내었다. 한편 losartan에 의한 수축력 감소 현상은 2주간 ACEI인 enalapril을 식수에 타서 먹인 경우에는 나타나지 않았다. 결론 : losartan에 의해 KCl이나 phenylephrine에 의한 수축력이 감소하는 것은 혈관에 존재하는 RAS 특히 angiotensin Ⅱ의 다른 수축제의 작용을 증가시키는 작용이 차단됨에 따른 것임을 짐작할 수 있었다. 또 내피세포를 가진 대동맥 절편이 내피세포 제거한 절편에서보다 losartan에 의한 수축력 감소를 더 현저히 보이는 현상은 내피세포가 losartan의 영향을 받아 생긴 것으로 사료된다. The perfusion pressure ratio, electrical field stimulation(40 V, 5 msec, 40 ㎐, 30 sec)-induced pressure change/norepinephrine(10^-5M, 15 ㎖)-induced pressure change, in isolated mesenteric bed was evaluated. Losartan-treated (30 ㎎/㎏/day, 2 weeks) SHR showed decreased perfusion pressure ratio compared with control. To evaluate the cause of the decrease in perfusion pressure ratio we used isolated aorta. Incubation with losartan (10^-4M, 90 min) decreased the contractile response induced by phenylephrine(10^-7M) and KCI(50 mM) and the decreased response was not shown in enalapril treated(5 ㎎/㎏/day, 2 weeks) SHR. The decreased contractile response by losartan was more prominent in endothelium intact strip and less remarkable in denuded strip. From these results we can assume that losartan decreased the contractile response by eliminating local renin angiotensin system, particularly in the endothelium of aorta and therefore by reducing the contraction amplifying effect of angiotensin Ⅱ.

종합검진센터 내원자에서 관상동맥질환 위험요인들의 분포

이충원,이종영,박종원,윤능기,김영조,이현우,이무식,서석권 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.3

1991년3월부터 8월사이에 대구시에 소재한 1개의 대학병원의 종합검진센타에 내원해서 종합검진을 받은 남자 422명(69.9%)과 여자 182명(30.1%)을 대상으로 하여 심헐관계질환의 위험요인들의 전체적인 분포를 보았다. 평균 연령은 남자가 43.3(표준편차, 10.3), 여자가 44.4(표준편차, 10.8)였다. 남자에서 연령에 따라 0.05 수준에서 통계적인 유의성을 보인 위험인자는 혈청 총콜레스테롤(TC). 트리글리세라이드(TC), 고밀도 지단백콜레스테롤(HDL), 저밀도 지단백콜레스테롤(LDL), 수축기혈압, 비체중, A형행동양상이었으며 생활습관으로서는 음주, 흡연, 규칙적인 운동, 우유와 커피섭취, 수면 등이었다. 여자에서는 TC, TG, LDL, 수축기와 확장기혈압, 비체중 그리고 커피섭취와 수면 등이었다. 남자에서 총콜레스테롤의 평균은 181.7mg/dl(표준편차, 32.2), 여자는 182.5mg/이(표준편차, 42.2)였다. 대부분의 위험인자들은 구미의 수준에 미치지 못했으나 남자에서 흡연율이 전체적으로 61.8%로 높으 수준이었으며 특히, 20~29세가 72.9%, 30~39세가 75.2%로서 다른 연령군에 비해 상대적으로 높았다. 여자에서는 전체적으로 6.0%에 지나지 않았다. 확장기혈압 90mmHg 이상을 고혈압자로 정의했을 때의 유병률이 여자 전체대상자에서 24.7%로 높았으며 50-59세는 표본수가 적어서 문제가 되었으나 53.1%였다. 어떤 인구집단내에서 총콜레스테롤의 평균이 200mg/dl 미만이면 고혈압과 흡연의 인구집단의 수준에 관계없이 관상동맥질환(coronary heart disease)의 발생은 드문 것으로 보고가 되고 있으므로 당분간 관상동맥질환 발생률의 급속한 절대적인 증가는 힘드리라 사료된다. 그러나 이러한 결과는 본 연구의 대상자들이 대표성을 지니지 못하며 건강검진센터에 자발적으로 내원한 사람들이므로 해석에 주의를 요한다. Authors examined the distributions of the risk factors for the coronary heart disease in the 422 male (69.9%) and 182 female (30.1%) visitors to the health examination center of a university hospital located in Taegu March to August 1991. Mean age of males was 43.3(standard deviation, SD 10.3) and that of females was 44.4(SD 10.8). Total cholesterol(TC), triglyceride (TG), high-density lipoprotein and low-density lipoprotein cholesterol(LDL), systolic blood pressure, Quetelet index, and Type A Behavior Pattern, and some of life habit variables(alcohol intake, smoking, regular exercise, milk and coffee intake and sleeping) were statistically significant in age groups of the males(P<0.05). In the females, TC, TG and LDL, systolic and diastolic pressure, Quetelet index, coffee intake and sleeping were statistically significant in age groups (P<0.05). Mean of total cholesterol was 181.7㎎/dl(SD,32.2) in males and that of females was 182.5㎎/dl(SD,42.2). Most of the risk factors levels were lower than the Euro-Americans', while smokers were high with 61.8%, especially 72.9% in 20-29 age group and 75.2% in 30-39 age group in males. In females, smokers were just 6.0%. Hypertensives defined by more than 90mmHg diastolic pressure were 24.7% in females, particularly 53.1% in 50-59 age group, but size of the strata was rather small(N=49). In the light of the report that coronary heart disease is uncommon irrespective of population levels of smoking and hypertension, where average total blood cholesterol level in a population is low(<200mg/dl), it is not likely that the absolute increase of the number of the coronary heart disease will increase markedly in the near future. But cautions should be exercised in interpreting the results of this study due to the lack of representativeness and volunteerism. .

스포츠 관광 활성화를 위한 마케팅 전략

조충현,김홍식,이동헌 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.4

This study was the marketing strategy based on sports tourism, which affects the tour industry. The study used the simple random sampling method in the group of the Kwang-Ju district citizens. The group representatives were directly interviewed, and 277 interviewees replied with concern. The rest of the interviewees were not interested in the survey. The general characteristics of the interviewees -- gender, age, education, job, monthly salary. --were used to analyze the items related to the marketing strategy for the traditional wrestling. In the product selling strategy, there was a significant difference depending on the job and age difference. The interest put on the game changed according to the age difference. The suggested policy is as follows. There is a need for a certain space, in order to provide the public relations of the date and location of the sports tourism match, which will be the product selling strategy. Also, the promotion strategy, using various events, is required urgently. Moreover, it would be good to have more than just viewers of family and friends, but to develop more active programs with higher participation level. This study is, valuable, in the sense that it offers fundamental information related to the traditional wrestling and its marketing strategy, when there is no such information in this field. It is expected for the readers to utilize this study to investigate more into the field, or to look up for new plans to activate the sports tourism.

선 그래프 해석과 이해의 지각·인지 과정에 관한 모형 : 힘과 운동 관련 선 그래프를 중심으로

문충식,김범기 한국교원대학교 과학교육연구소 1998 청람과학교육연구논총 Vol.8 No.1

선그래프는 과학에서 정보를 전달하는 수단으로써 뿐만 아니라 실험의 결과를 해석하는 수단으로 유용하게 활용된다. 그러나 학생들은 그래프의 시각적이면서도 추상적인 특징 때문에 해석이나 이해에 상당한 어려움이 있다. 따라서 선그래프 이해의 지각ㆍ인지 과정을 분석하는 것이 매우 중요하다. 본 연구의 목적은 선그래프 해석과 이해에 관한 지각ㆍ인지 과정에서의 한 모형을 제시하는 것이다. 이 모형은 Pinker의 그래프 도식 이론과 Fisher의 정보 처리 이론에 기초를 두고 있으며, Lohse, Shah, Winn 등의 연구를 참고하여 제시하였다. 그리고 이 모형의 특징은 선그래프 문제를 해결하는 과정을 내용 독립적인 선그래프 해석과정과 내용 의존적인 선그래프 이해과정으로 나누었다. Line graphs are particularly effective in communicating relationships. They can convey vast amounts of information that cannot be communicated effectively by words or numbers alone. Thus, line graphs allow us to communicate scientific information and to see scientific data analyses. However, students are weak in their ability to comprehend line graphs because the features of line graphs are visual and abstract. McDermott et al. (1983) have shown that this is a problem even for many university students in the sciences. Then, it is very important to analyze the perceptual and cognitive processes in the comprehension of line graphs. The purpose of this study is to propose a model of line graph comprehension that includes perceptual and cognitive processes. This model is based on the graph schema theory of Pinker (1990) and the information processing theory of Fisher (1992). The major processes are the interpretation process and the comprehension process. In the interpretation process of line graphs, defined that the visual information of graphs is assimilated with the graph schema and is simultaneously accommodated to graph schema. The comprehension process of line graphs is one in which the result of the graph interpretation is assimilated with the existing conceptual schema on graphs and is simultaneously accommodated to the existing conceptual schema on graphs.