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.

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.

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.

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.

고주파 마그네트론 스퍼터링 방법에 의해 MgO(100) 기판위에 증착된 (Pb, La) TiO_3 박막의 제작과 특성연구

張志根,張鎬廷,金敏寧,嚴于鎔 단국대학교 1995 論文集 Vol.29 No.-

Pyroelectric (Pb, La) TiO_3 (PLT) thin films have been prepared on Pt coated MgO(100) substrate by RF magnetron sputtering method in an atmosphere of mixed gas of Ar and O_2. PLT file deposited at 580℃ showed perovskite single phase with prominent C-axis orientation perpendicular to the substrate surface. The full width at half maximum (FWHM) of the PLT film was 0.45 degree indicating good crystallinity. From the RHEED observation, the PLT film showed spotty pattern, indication a single crystal phase with rough film surface. The relative dielectric constant(ε_r) and dielectric loss(tanδ) of the perovskite PLT film deposited at 580℃ were 75 and 0.006 at 1kHz, respectively. From the hysterisis loop analysis using sawyer-tower circuit, the remanent polarization(P_r) and coercive field(E_c) were about 10μC/㎠ and 160kV/㎝, respectively.

고농도 도핑된 n+-Si 영역상에 Co/Ti 이중막 실리사이드의 형성과 특성연구

장지근,신철상 단국대학교 1999 論文集 Vol.34 No.-

We have studied the formation of Co/Ti bilayer silicide with low resistivity and good thermal stability on the heavily As doped n^+-Si region. In this paper, Co/Ti bilayer silicides were fabricated by depositing Co(150Å)/Ti(50Å) films on the As-implanted n^+-Si region in an E-beam evaporator and performing the two step RTA process (first annealing:650℃/20sec. second annealing:800℃/20sec) in a N_2 ambient with the pressure of 10^-1atm, Co/Ti bilayer silicides obtained from our experiments exhibited the low resistivity of about 19μΩ-㎝ and the uniform thickness of about 500 Å without increase of sheet resistance and occurrence of agglomeration under the long post-annealing time up to 1000℃.

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.

태음인 체질의 비만아동에 대한 운동처방

박기호,정연희 仁川敎育大學校 科學敎育硏究所 2003 과학교육논총 Vol.15 No.-

본 연구는 비만해소 방안과 효과의 검토 및 자료를 제시하기 위하여, 비만도 20% 이상 초등학교 5·6학년 남학생 중 체질진단결과 태음인체질의 10명을 대상으로 10주 동안 주4회, 50∼70% HRmax의 강도로 운동처방프로그램을 실시하여 운동처방 전·후의 신장, 체중, 혈압, 심박수, 체지방량의 신체적 변화와 특수 인성검사A의 심리적 변화를 측정하였으며, 자료분석은 SPSS통계프로그램의 비모수 검정의 Wilcoxon 부호순위 검정을 이용하였다. 신체적 변화에서는 신장은 근사 유의확률이 P < .005, 혈압은 수축기와 이완기에서 P < .011과 P < .026, 체지방량은 P < .028로 유의한 것으로 나타났으나, 신장은 운동처방에 의한 영향이라고 볼 수 없으므로 유의한 차이가 없는 것이 타당하다. 체중과 심박수에서는 유의한 차이가 나타나지 않았다. 심리적 변화에서는 타당도 척도(Validity Scales), 일반 성격척도(General Personality Scales), 특수적응척도(Special Adaptation Scales)에서는 유의한 차이가 나타나지 않았다. 아동비만을 사상의학의 바탕인 체질의학에서 체질적 특징과 비만에 대한 신체적·심리적 특징을 파악하여 체질에 맞는 10주간의 짧은 기간이지만 규칙적으로 꾸준히 운동을 실시한다면 비만을 억제하거나 치료할 수 있고, 나아가 성인비만으로 이환될 가능성을 예방할 수 있을 것이라 생각된다. The purpose of this study was to investigate the effective anti-obesity measures and its effects. The research was conducted to ten boys(the 5th and 6th graders in elementary school) whose obesity degree is over 20 percent. The subjects with Taeeum-In constitution are exposed to exercise programs with 50 to 70 HRmax for 10 weeks. The exercise prescription program was implemented 4 times a week. The physical and psychological changes was measured by the pre & post-program. The analysis of data was relied on Wilcoxon Signed Ranks Test among nonparametric tests(significant level P<.05). The results of this research are as follows: 1) in respect of the physical changes, the blood pressure is significant(P<.011 and P<.026) in the contraction period and the relaxation period respectively. The amount of body fat is significant(P<.028). But heights is not significant(in spite of P<.05) because it was not influenced by the exercise prescription. Weights and heart beats are also not significant; 2) in respect of the psychological changes, the desirability of validity scales and General personality scales and special adaptation scales are not significant. This study suggests that regular exercise in accordance with human constitution may treat obesity and prevent transferability for adult obesity.