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.

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.

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.

빅데이터 선호도 분석 에이전트 시스템을 위한 감성사전 구축에 관한 연구

손성일,박찬곤 청주대학교 산업과학연구소 2014 産業科學硏究 Vol.31 No.2

Due to the emergence of a variety of SNS(Social Networking Service) are created and disappear a lot of information. Because of the nature of the SNS is included subjective opinion or sentiment information. So, users can use a lot of information, including sentiment. Existing machine learning / text mining / Opinion mining techniques with the intention of the user engendered different results. In the study, In order to increase confidence in the results of the Big Data Preference Analysis Agent System is proposed. in addition, In order to increase the reliability of the sentiment analysis was constructed sentiment dictionary.

P3HT:PCBM 유기태양전지의 효율증대

박자영,정치섭 청주대학교 산업과학연구소 2016 産業科學硏究 Vol.33 No.2

The power conversion efficiency of the organic solar cells based on (3-hexylthiophene)(P3HT) doner and phenyl-C61-butyric acid methyl ester (PCBM) acceptor was studied. The optimum experimental conditions for achieving maximum exciton seperation were attained by analyzing the power efficiencies of solar cell with respect to the solar cell parameters.

운봉산 일대 알칼리성 현무암을 활용한 에너지의 증폭

이은석,이정우,이용준 청주대학교 산업과학연구소 2016 産業科學硏究 Vol.33 No.2

The densities of the three rocks from Unbongsan(Goseong-gun, Gangwon-do, Rep. of Korea(South Korea)) were 3.90g/cm3, 2.69g/cm3 and 5.90g/cm3. From the TG/DSC experiment for the sample UB-1 we confirmed the repetitive exothermic processes over 550℃. This means that considerable amount of energy could be extracted from Cheon-Jee using some indirect heat sources. The sample UB-3 gave off about 25 wt% of gases upto 800℃ which is different property from those of UB-1 and UB-2. In the 1st and 2nd demonstration, the two devices, HB-1(a conventional heat blower, electrical cap. 5kw, fan cap. 5kw) which is being sold in public market and HB-2(a heat blower privately made by us, electrical cap. 5kw, fan cap. 30kw) equipped with pellets of Cheon-Jee were run simultaneously. And we showed that the amount of heat from HB-2 was much more than that from HB-1. For the voltages of 160V and 200V, the respective average temperatures of HP-2(a ceramic panel coated with Cheon-Jee) were higher than those of HP-1(a ceramics panel for blank test). No distinct gamma ray radiation was detected from the pellet samples of Cheon-Jee.

Nd1-xBaxFeO3-y계의 고용체 합성 및 물성에 대한 연구

이주호,이은석 청주대학교 산업과학연구소 2016 産業科學硏究 Vol.33 No.2

The physical and chemical properties of the perovskites ; Nd1-xBaxFeO3-y system(x = 0.0, 0.1, 0.2, 0.3(NBFO system)) have been studied. XRD experiment showed that the XRD patterns of all the four samples fall under orthorhombic symmetries and the lattice volumes of x=0.0 to 0.2 decreased then increased back when x=0.3. Mohr salt analysis determined the mole ratio of Fe4+. The τ values and oxygen vacancies(y values) clearly increased with x value. And finally the nonstoichiometric chemical formulas were determined from these x, τ and y values. Significant weight changes were observed on TG/DSC experiment. That is, the four samples of NBFO system showed 3-stage weight decreases. The weight decrease is thought to be resulted from the changes of oxygen content.

안티몬을 도핑한 Si 박막의 형성 및 특성

김광호,천홍빈 청주대학교 산업과학연구소 2017 産業科學硏究 Vol.34 No.2

n+-silicon layers and n+p diodes on the SiO2/p-Si (100) and on the p-Si (100) substrates respectively, were fabricated and evaluated by remote plasma CVD using DIPAS(DiIsoPropylAminoSilane) and TDMASb(Tris-DiMethylAminoAntimony) sources. The concentrations of silicon were controlled from 1.02×1018 cm-3 to 5.6×1018 cm-3 in the fabrication of antimony-doped silicon films and the obtained results were well consistent with the result of typical phosphorus doped silicon. The crystallinity of the n+ silicon layers turned out to be amorphous phase. The ideality factor of n+p junction diode fabricated on the p-Si (100) substrate was about 1.3 and the interface at the junction of the diode was very good.

탈황석고 정제방법 및 골재 종류 변화가 고로슬래그 미분말 다량치환 모르타르의 품질에 미치는 영향

김민상,이동윤,한천구 청주대학교 산업과학연구소 2017 産業科學硏究 Vol.35 No.1

This study aimed to analyzed the refining methods and replacement ratios of desulfurized gypsum from high volume blast furnace slag mortar and the engineering characteristics of cement mortar in relation to aggregate kinds. As factors of the experiment, in case of desulfurized gypsum depending on the refining method Raw material, 0.3 mm Sieving, 500℃ Heating were used, and the replacement ratios were set at 5 levels of 0, 5, 10, 15, and 20 %. For aggregate kinds, natural fine aggregate and recycled fine aggregate were used and compared, respectively. Overall, the best refining method of desulfurized gypsum was found to be 0.3 mm sieving analysis and within 5 % of replacement ratios the aggregate was best for natural fine aggregate considering flow, air contents, and compressive strength

겨울철 버블시트 피복양생방법 변화에 따른 벽식구조 노출철근의 온도 특성

김태우,이제현,경영혁,한천구 청주대학교 산업과학연구소 2017 産業科學硏究 Vol.35 No.1

This study aims to identify temperature characteristics of exposed reinforcement by position in relation to the change in coating curing method of bubble sheet under Winter climate condition and suggest efficient insulation coating method of exposed reinforcement with wall structure. As experiment variables, water-cement ratio(W/C) 50 %, target slump 150 ± 25 mm, target air volume 4.5 ± 1.5 % were mix designed like the general construction site, and 2-layered bubble sheet was used as curing material. We planned changes in 4 types of surface-covered curing methods by modeling parts where slab and wall cross over and exposed reinforcement is constructed. As a result, curing method D, which coated bubble sheet on exposed reinforcement front, was identified as most superior in preventing early-frost damage, but B method, which cut out and coated bubble sheet by bar spacing, was also deemed outstanding if we additionally consider the efficiency and convenience of construction.