밀페공간 내에 가연성가스가 누출될 때 가연혼합기 생성에 관한 이론적 연구

나기대,홍명석,정낙규,박기남 조선대학교 환경공해연구소 1998 環境公害硏究 Vol.14 No.-

Numerical simulation have been conducted to obtain the basic information for the prevention of explosion in a rectangular enclosure with n-Butane(n-C_(4)H_(10)) gas leak. A numerical Model was established to predict the characteristics of flammable mixture formation with the variation of variables: leak location, leak time. leak velocity and aspect ratio. When the gas leaks from the bottom of the rectangular enclosure, the closer the leak location is to the side wall, the faster mass transfer towards the horizontal direction than the vertical direction is as the leak velocity increases, the fuel reaches higher and in the case of the same leak velocity and leak time, mass transfer in the leak direction is less than that in the horizontal direction because of the gravitational force. Aspect ratio of the rectangular enclosure also affects the formation of the flammable mixture proportional to the leak time and the leak velocity.

밀폐공간 내에 가연성가스가 누출될 때 가연혼합기 생성에 관한 이론적 연구

나기대,홍명석,정낙규,박기남 조선대학교 환경연구소 1998 環境硏究 Vol.14 No.1

Numerical simulation have been conducted to obtain the basic information for the prevention of explosion in a rectangular enclosure with n-Butane(n-C_4H_10) gas leak. A numerical Model was established to predict the characteristics of flammable mixture formation with the variation of variables: leak location, leak time, leak velocity and aspect ratio. When the gas leaks from the bottom of the rectangular enclosure, the closer the leak location is to the side wall, the faster mass transfer towards the horizontal direction than the vertical direction is as the leak velocity increases, the fuel reaches higher and in the case of the same leak velocity and leak time, mass transfer in the leak direction is less than that in the horizontal direction because of the gravitational force. Aspect ratio of the rectangular enclosure also affects the formation of the flammable mixture proportional to the leak time and the leak velocity.

21세기 대구 · 경북의 성장 동력으로서 『문화자본』의 의미

권찬태,권기정,김진수,이영기 慶北大學校出版部 2005 經商論集 Vol.32 No.2

본 연구에서는 문화자본의 의미를 바탕으로 대구 · 경북이 본래 가지고 있지만, 활용하지 못하고 있던 문화자본을 대구 · 경북 지역의 성장동력 산업으로 이끌기 위한 전체적인 방향을 제시하고자 하였다. 첫째, 대구 · 경북은 문화의 21세기에서 창조적이고 차별화된 문화자본을 축적하기 위해 지역 내 숨겨진 자원을 발굴하고, 개발해야 한다. 둘째, 사회 · 문화 주동적 성향을 토대로 창의적이고 미래지향적인 문화상품을 개발해 나가야 하고, 세계 속에 대구 · 경북을 알릴 수 있는 대표 브랜드 상품 개발에 주력해야 한다. 셋째, 풍부한 문화유산, 자연환경 등의 유 · 무형의 자원을 최대한 활용하여야 한다. 본 연구에서는 이러한 세 가지 방안의 실천을 위한 행정기관, 기업, 언론 및 교육기관에 따른 방법 또한 제시하였다. 먼저, 지역정부는 문화인프라 구축의 중요성을 인식해야한다. 다음으로, 기업은 문화자본 축적을 비용으로 생각하기보다는 투자로 생각할 수 있는 인식의 전환이 필요하다. 마지막으로, 언론 및 교육기관에서는 선진문화지역으로 도약하기 위한 지역 주민들의 자긍심과 인식이 확대될 수 있도록 도와주어야한다. This paper suggested that the role of cultural capital to be economic growth engine in Daegu and Kyungpook region. Daegu and Kyungpook's role is as followed ; The first, Daegu and Kyungpook should develop and unearth hidden cultural resources, and the second, should develop creative cultural goods based on social and cultural propensity, the third should use the tangible and intangible resources such as cultural inheritance and nature. Besides this, this paper also suggested the roles of local government, local business, local press and local educational institution in Dageu and Kyungpook region. At first, local government should recognize the importance of cultural infrasturcture, the local business needs the concept of cultural capital, and the local press and educational institution should help local citizens have the pride of local culture.

고강도 철근콘크리트 부재의 부착특성

申鍾學,河基柱,朴秉基 慶一大學校 1997 論文集 Vol.14 No.2

In this experimental study, thirty-six specimens were constructed and tested to determine bond stress-slip characteristics of reinforcing bar embedded in concrete. Considering actual bond stress-slip relationships in the interface between reinforcing bar and concrete allows for a realistic prediction of cracking. Based on the test observations and the analysis of the test data, the following conclusions are made. (1) Bond stress-slip relationships were found in variance with concrete strength, concrete cover, bar diameter, and bond length, which were very important factors to evaluate the bond characteristics. (2) In this experimental program each specimen were showed the splitting failure, pull-out failure, and bond yielding failure mode due to the combination of design factors through this experimental program. For the high-strength concrete, test specimens, used in small size diameter(D13), were showed in splitting failure with impact sound. And it was also found that the failure mode were difference in the bar diameter. (3) in the same case of concrete strength concrete, it was found that the maximum bond stress was deeply influence in embedded bond length. (4) Maximum bond stress from test results was very higher than values by ACI 318-89 Code. Therefore, ACI 318-89 Code for the bond design was very satisfactory in reinforced concrete structures. It was thought that the optimal formulas of maximum bond stress should be proposed for the optimal design.

Reference Map of Soluble Protenis from Salmonella enterica Serovar Enteritidis by Two-Dimensional Electrophoresis

김곤섭,Eung-goo Lee,Yong-hwan Kim,정태성,Yong-seung Shin,Gee-wook Shin,Hui-guen Cha,Mi-rim Park 대한수의학회 2003 Journal of Veterinary Science Vol.4 No.2

Map of Soluble Proteins from Salmonella enterica Serovar Enteritidis byTwo-Dimensional ElectrophoresisMi-rim Park, Eung-goo Lee, Yong-hwan Kim, Tae-sung Jung, Yong-seung Shin, Gee-wook Shin, Hui-guen Cha and Gon-sup Kim*Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, KoreaReceived May 17, 2003 / Accepted July 23, 2003J. Vet. Sci. (2003), 4(2), 143-149JOURNAL OFVeterinaryScience*Corresponding author: Gon-sup Kim Laboratory of Veterinary Biochemistry, Collage of Veterinary Medicine, Gyeongsang National University, 900 Gazwa, Jinju 660-701 Korea Tel: +82-55-751-5823, Fax: +82-55-751-5803 E-mail: gonskim@nongae.gsnu.ac.kr

경마 투자의 정당성 확보와 저변확대를 위한 발전방안

권기정 김진수 이미정 청주대학교 사회과학연구소 2005 한국사회과학연구 Vol.27 No.2

The purpose of this study is to demonstrate that horse racing is not gambling but investment. To demonstrate this, we used two methods. the first is logical reasoning three standards; information usage degree, benefit promotion degree, expected revenue degree is used. The second method is questionaire research of university student and professional group. The result of logical reasoning shows horse racing is not gambling but rational investment and the result of questionaire research is general public has blind prejudice that horse racing is a gambling. On the base of these result , this study suggested three step plans to improve and gain public favor in horse racing investment. the first step plan is marketing and education strategy to building human infrastructure in the short term. The second step plan is offering rational and unbiased horse racing investment infomation in the middle term, The last step plan is establish horse racing university to improve and gain scientific reasonableness. 본 연구에서는 투자와 도박을 판단히는 세 가지 기준인 정보의 이용정도, 효익 증대의 정도, 기대수익의 정도를 이용하여 경마가 도박이 아닌 '투자’ 라는 사실을 이론적이고 논리적으로 증명하였다. 또한 전문가와 일반인들의 경마에 대한 인식현황 파악을 위해 이론적 연구와 더불어 전문가 집단과 일반 학생 집단에 대해 간이설문조사를 실시하였다. 설문조사의 결과 대부분의 사람들이 투자와 도박에 대한 일정한 판단기준 없이 단지 ‘선입관’이나 ‘편견’에 따라 경마를 도박으로 보고 있었다. 이러한 이론적이고 논리적인 토대를 바탕으로 본 연구에서는 경마투자의 정당성 확보와 저변 확대를 위한 발전 방안을 3가지 제시하였다. 첫째, 본 연구에서는 단기적으로 인적 인프라를 구축할 수 있는 대 · 내외적인 홍보전략과 교육전략을 제시하였다. 둘째, 중기적으로 투명하고 공정한 경마정보의 제공방안을 정보의 신뢰성, 정보의 공유성, 정보의 차별성, 정보의 통제성, 정보의 적시성 측면에서 상세하게 제시하였다. 셋째, 본 연구에서는 장기적으로 학술장려 및 연구지원을 통해 경마를 새로운 사회과학이리는 학문영역(예, 경마투자론,경마투자학 등)으로 자리잡을 수 있는 방안을 제시하였다. 또한 최종적으로는 경마의 모든 분야를 포함할 수 있는 경마종합대학을 설립함으로써 일반인들에게 정당성과 타당성을 자연스럽게 인정받을 수 있는 학문적인 체계를 구축할 수 있도록 하였다.

4-대칭 LMT구조를 이용한 3차원 반도체 자기센서(Ⅱ) : 감도특성 Sensitivity

장지근,전병조 단국대학교 신소재기술연구소 1993 신소재 Vol.3 No.-

3차원 자계를 측정할 수 있는 새로운 구조의 4대칭 LMT 반도체 자기센서를 설계하고, 소자의 전·자기적 특성을 이론적으로 모델링하였다. 제안된 소자는 물리적 변수가 X_jc=2.4∼2.6㎛, N_B=10^16cm^-3, X_b=10∼12㎛, L=5∼10㎛로 실현될 때 최적설계가 이루어지며, 소자의 감도특성은 V_CB=10V, B≤0.4[T]에서 S_rxx(S_ryy)≒35[%/T], S_rzz=15[%/T]로 나타났다. 최적 설계인 4대칭 LMT 소자는 종래의 3차원 반도체 자기센서에 비해 넓은 자계범위에서 높은 채널상대감도 특성을 나타내며, 114×114×5㎛^3의 미소 공간분해능으로 5[T]까지의 자계크기를 감지할 수 있다. We have designed a new semiconductor device capable of measuring 3-D magnetic field using four symmetrical LMT structures. This device can be optimally designed when physical parameters are as follows: a depth of collector is in a range of (2.4∼∼2.6)㎛ and a length/doping concentration of the base is in a range of (10∼12)㎛/10^15cm^-3, and a distance between collector pairs is in a range of (5∼10)㎛, respectively. The optimally designed magnetic sensor has a spatial resolution of(114×114×5)㎛^3 and exhibits a sensitivity characteristics of S_rxx(S_ryy)≒35[%/T] in the x(y)-channel and S_rzz≒15[%/T] in the z-channel under the condition of V_CB=10V, B≤0.4[T]. This device shows a good performance in the electromagnetic characteristics with little of cross-sensitivities in comparison to other devices reported so far having an upper measuring limit of approximately 5[T].

비만검사의 준거지향기준 설정

이기봉 서울대학교 체육연구소 2000 서울大學校 體育硏究所論集 Vol.21 No.1

The propose of this study was to establish the Criterion-Referenced Standards(CRS) of Obesity Test for the male middle and high school students. The subject of the study were 1,152 male students, ranging from seventh grade to twelveth grade and consist of 192 each from those grades. Skinfold test, Body girth test, and Body mass index test were used to measure obesity, and CRS were established using empirical method and normative method. The results were as follows; 1) CRS using empirical method were established according to estimated criterion, The cut off point which is the cross of score distributions between obesity group and ordinary group. CRS of triceps were 15mm for middle school, 16mm for high school, and CRS of calf were 18mm for middle school, 16mm for high school, and CRS of skinfold sum were 33mm for middle school,32mm for high school. CRS of abdomen girth were 71cm for middle school, 79cm for high school, and CRS of abdomen-neck girth were 38cm for middle school, 43cm for high school, CRS of BMI were 21 for middle school, 23 for high school. 2) CRS using normative method were established as the 30, 40, 50 percentile scores of national norm of Korea and Canada. CRS of triceps were 8.5, 9.3, 10.3mm for middle school, 7.9, 8.6, 9.6mm for high school, and CRS of calf were 9.0, 9.9, 10.9mm for middle school, 8.3, 9.1, 10.0mm for high school, CRS of skinfold sum were 17.8, 19.4, 21.4mm for middle school, 16.3, 18.0, 19.6mm for high school. CRS of abdomen girth were 65.0, 65.9, 67.1cm for middle school, 70.0, 72.0, 73.4cm for high school, and CRS of abdomen-neck girth were 33.4, 34.0, 35.1cm for middle school, 35.4, 36.4, 37.6 cm for high school. CRS of BMI were 18.4, 19.0, 19.5 for middle school, 20.2, 20.7, 21.1 for high school.

가족주기에 따른 부부적응의 변화

이기숙 新羅大學校 1984 論文集 Vol.17 No.-

This study was devised to research the changes on marital adjustment over the family life cycle(FLC). Marital Adjustment Scales were composed of three subfactors such as Consensus, Sexual intimacy and Satisfaction with the marriage and mate. The number of the subjects were 430, who were living in Pusan and they divided into six stage family life cycle. This study was surveyed by Mean scores on marital adjustment and three subfactors and tested by ANOVA for one-way and Pearson correlation. The results were as follows: 1. The changes on marital adjustment over the FLC categories were significant at P=.005 2. The changes on consensus over the FLC categories were significant at P=.001 3. The changes of sexual and affectional intimacy over the FLC categories were significant at P=.0001 4. The changes on satisfaction with the marriage and mate over the FLC categories were significant at P<.05 5. There was a highly correlation between marital adjustment and its subfactors at P=.001) 6. The nature of the trend of marital adjustment over the FLC was a significant orgive curvilinear or ∽-shaped mode.

Laser 반사측정법을 이용한 상악 전치부 함입시 저항중심의 수평적 위치에 관한 연구

박기호,손병화 대한치과교정학회 1993 대한치과교정학회지 Vol.23 No.4

Tooth movement by segment is one of themeans which are frequencly used in daily orthodontic practice. When we retract or intrude a tooth or teeth, we should recognize the center of resistance of the certain tooth or teeth. There have been many studies about the center of resistance of a single tooth, not so much was about the tooth-segment. At the present study the center of resistance of the maxillary anterior segment is experimentally investigated by using laser reflection technique and metal splints on the human dry skull. The variables of intrusive force magnitude are divided into two groups, 50g and 100g group. The results were as follows ; 1. The center of resistance of the maxillary anterior segment composed of the central and lateral incisors was at the mesial portion of canine crown at the coronal level. 2. The center of resistance of the maxillary anterior segment composed of the central and lateral incisors and canines is between the canine and the 1st premolar crowns at the coronal level.