尖端技術産業團地의 淸州誘致에 따른 開發戰略

權尙俊 청주대학교 산업과학연구소 1991 産業科學硏究 Vol.9 No.-

The Strategy For Technopolis According To Developing In Chongju Area. In this study the strategy for technopolis according to developing in Chongju Area is suggested in order to promote research and development and prepare participants and residents for the construction of the technopolies in the area. There are new fields, which are concerned with the rapid growth and the high technologies ; mechatronics electronics, fine chemicals, new materials, agriculture, environments, etc. The strategy is based on finding new ideas for the construction of the technopolis ; to increase the effects on the development for the area, to have supports in the management and the intensification for R & D, to facilitate the high technologies in the area, and to make up complexes for industries and R & D, to facilitate the high technologies in the area, to make up complexes for industries and R&D, and to prepare the programs for the complexes. There are not only new ideas for the technopolis but also confrontations to the ideas ; to consider the factors for the environmental control planning to have regional basis for the development of the technopolis, and read just in planning the related cities and towns to the technopolis.

청주대학교 캠퍼스 내 옥외 편의시설물 이용실태 연구

김민중,김득곤,장태현 청주대학교 산업과학연구소 2001 産業科學硏究 Vol.18 No.2

The educational environment of university campus is very important. Because that the campus is creative environment and make emotional as place which make the intellectual and emotional humanbeing. In this university case, 1. The establishment of facilities in out of campus based the student's opinions 2. The place of establishment and facility things have to surveied when the university make the master plan about space, circulation, season and etc. 3. The environment and life mode of facilities are research by the environmental design aspects. 4. Every facilities in the campus require the opinion and participation of professionalists. 5. The University Environmental Design Committee composed in the school organized system. According to above the results, this article proclaimed the University administrative staff and relative professionalists seasch to effective methods and to approach solving the problems.

철골가새골조의 형상에 따른 동적변위제어 효과

김호수,이한주 청주대학교 산업과학연구소 2007 産業科學硏究 Vol.25 No.1

This study presents stiffness-based optimal design to control quantitatively lateral drift of tall steel braced frames subject to seismic loads and effect of dynamic displacement control according to the shape of steel braced frames. To this end, lateral drift constraints are established by introducing approximation concept that preserves the generality of the mathematical programming and can efficiently solve large scale problems. Also, the relationships of sectional properties are established to reduce the number of design variables and resizing technique of member is developed under the 'constant-shape' assumption. Specifically, the methodology of dynamic displacement sensitivity analysis is developed to formulate the approximated lateral displacement constraints.

2중 버블시트로 단열처리된 옹벽의 온도이력 및 결로 방지 특성

정은봉,장덕배,한천구 청주대학교 산업과학연구소 2013 産業科學硏究 Vol.30 No.2

This study investigates the effect of double layered bubble sheets on the side condensation of concrete cast for the retaining walls placed underground in practice. Temperature history was measured during summer and winter, in order to examine the level of the insulation performance of the double layered bubble sheets and to estimate the level of side condensation of the concrete structures applied in practice. Test results showed that in summer, the double layered bubble sheets applied to the outside of the retaining walls obstructed the low heat and moisture transfer, arising from the earth behind the walls. This effect maintained the temperature and the humidity of the retaining wall structures and thereby resulted in the protection of the side condensation. In addition, in winter, the similar effect of the double layered bubble sheets on the protection of the side condensation in the retaining walls was achieved. It is concluded that the double layered bubble sheets have a significant effect on insulating concrete structures, especially on the full protection of side condensation of the retaining wall during both summer and winter.

시멘트 제조과정 중 집진된 미분시멘트 및 CKD를 활용한 체육시설 바닥구축재용 고화재의 개발

한천구,한민철,백대현,송일범 청주대학교 산업과학연구소 2010 産業科學硏究 Vol.27 No.2

The objective of this study is to develop floor structuring materials used in various facilities, such athletics, walks, and bicycle roads. This study applied a mixed composition of average portland cement, fine cement, which is obtained by precipitating fine particles produced in a cement crushing process, and cement kiln dust, which can be obtained by precipitating the fugitive dust generated in raw material crushing and Clinker burning processes. The mixing ratio of these different materials for achieving the optimum mixing were determined by a 15 level with the percentages of 0, 25, 50, 75, and 100. As a result, the compressive strength and flextural strength increased according to the increase in the ratio of FC in matrices, but the fluidity decreased. Also, the fluidity and strength decreased according to the increase in the ratio of CKD. However, in a case that considers economical efficiency, it shows excellent results according to the decrease in the ratio of FC and the increase in the ratio of CKD. Therefore, in the results of the general analysis of the fluidity, strength characteristic, and economical efficiency, the optimum mixing ratio of these materials was determined as OPC : FC : CKD = 50 : 25 : 25. It can be seen that this ratio represented the most excellent performance as a stabilizer.

고밀도 스티로폼을 이용한 거푸집패널의 구조성능평가

김호수 청주대학교 산업과학연구소 2008 産業科學硏究 Vol.25 No.2

The form work is needed in order to maintain the shape and size of building, and also to resist the lateral pressure of concrete and working load. But, the form system as a temporary structure includes many dangerous factors during construction. This study presents the wall form system using high density styrofoam to provide the two functions of form and insulation, and to simplify the installation process without removal works. For the field application of this form system, the safety of the form should be secured. Therefore, this study first performs the tensile and shear experiments for the unit form system, and then evaluates the structural capacity of the system through the structural analysis.

하이브리드 Support Vector Regression을 이용한 고객 점수화 모형

전성해 청주대학교 산업과학연구소 2008 産業科學硏究 Vol.25 No.2

Support vector regression is a regression tool based on statistical learning theory by Vapnik. It is a good machine learning algorithm for supervised learning. In this paper, we propose a customer scoring model using hybrid support vector regression. Traditional support vector regression needs to determine parameters of kernel function and regularization constant subjectively. These are very important to the result of support vector regression. But, in many researches, the values have been determined by the arts of researchers. In this paper, we determine the parameters objectively by grid searching. We make experiment using data set from UCI machine learning repository. Also, we use e1071 package of R project for our experiment.

협동 다이버시티를 채택한 무선 애드혹 네트워크에서 전력 증폭기의 효율이 시스템 수신율에 미치는 영향

이광렬,김남수 청주대학교 산업과학연구소 2009 産業科學硏究 Vol.26 No.2

This paper is considered effect of the efficiency of power amplifiers to ad-hoc wireless networks with cooperative diversity system. The efficiency of a power amplifier is affected by the internal thermal power consumption of the amplifier. We analyse the effect of the efficiency of a power amplifier to the outage probability of ad-hoc wireless networks. It shows that the required SNRs are 16 dB, 12 dB, 10 dB, and 9 dB with the efficiency of 20 %, 50 %, 80 %, and 100 %, respectively, at the outage probability of . We noticed that the power gain increases non-linearly with the efficiency of the power amplifier.

문화재지정 벽돌조 건축물의 외벽체 보수보강기법

권순찬,김태영 청주대학교 산업과학연구소 2010 産業科學硏究 Vol.28 No.1

This paper is aimed to clarify the strengthening and repair treatment of load-bearing walls in modern architectural properties. This research was performed through the repair reports of modern cultural heritage from 1986 to 2008. The 220 repair reports of 130 modern architectural properties have been prepared until december 2008 in korea. The 134 repair reports of 70 modern architectural properties are selected as the subject of this study, these 70 modern architectural properties are classified with 31 case for timber, 32 case for masonry, 4 case for (reinforced) concrete, and 3 case for others by structure. Most of them are timber structure and masonry. The brick work is classified with repair of static cracks, pointing, and anchoring-retained facades. The frames of opening are almost altered with new materials

Penicillin G acylase 유전자의 발현에 미치는 cold-shock의 영향

류수향,이상만 청주대학교 산업과학연구소 2010 産業科學硏究 Vol.27 No.2

Pga gene incoding the penicillin G acylase(EC 3,5,1,11, benzylpenicillin acylase, PGA) was characterized by E. coli BL(DE3) harboring pga gene. PGA was a heterodimeric form consisted 65kD and 24kD subunit with SDS-PAGE and it was localized in cytoplasm. When E. coli BL(DE3) was cultivated at 37℃ and then shifted the temperature with 33℃ and 29℃, the cell growth was higher at 37℃ than 33℃ and 29℃, but the production of enzyme more increased at lower temperature than higher temperature. When the strain was cultivated at 37℃ and shifted gradually untill 29℃ during 40 hours, the maximum activity of the enzyme was 2.45 U/㎖