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시멘트 製品의 品質에 관한 硏究 : 釜山市中 生産品을 中心으로 Available in Busan Area
朴春根,金明鎭 동아대학교 공과대학 부설 한국자원개발연구소 1975 硏究報告 Vol.1 No.1
Cement bricks or blocks are commonly used for the bearing wall or the curtain wall. But the commercially available mass producted cement products (Cement Bricks or Blocks) have many defects as the constituents of a structure. In this study, the authors carefully examined through the experimentation and reviewed the qualities of the cement products made by the manufacturing enterprises scattering in Busan Area. The results are as follows. (1) In order that more than 80% of the products have the second class strength, the fineness modulus of aggregate should be more than 3.1 (in view point of the standard compressive strength). In case of Busan Area, the best products can be produced by use of YANGSAN (2) raw aggregate. (2) There was a big difference as much as 2.3 times in the compressive strength under loose quality control for curing even among the products manufactured by the same company (under a given condition of production method, curing, mix by volume, ratio of cement and water, and quality of aggregates.) The compressive strength is proportional to the weight and the average strength of the wet products decreased about 16.2~28.69% compared with that of the dry products. (3) If the applications (use for bearing wall, or curtain wall) according to the strength of the products of the same specifications are classified and the quality grades are allocated, the selections of the products will become easier for their suitable applications, and also the safety and longer life of the structures can be expected. (4) In the regulation of installation for the cement product enterprises, especially the installation requirements of the curing room should be emphasized.
스치로폴 粒子를 使用한 輕量벽돌에 관한 實驗的 硏究 Ⅱ
朴春根,姜丙熙 동아대학교 공과대학 부설 한국자원개발연구소 1985 硏究報告 Vol.9 No.1
The purpose of this experimental study is to analyze the physical character of the lightweight cement brick to be mixed the polystyrene beads. The results of experiment is as follows. 1. The more the grading of polystyrene beads is small and it is lean mixture, the thermal conductivity is low value than the specimen which polystyrene beads is not mixed. 2. The coefficient of water absorption is low value in any case than the reasonable coefficient of water absorption of the general cement brick. ("A" class, 9% and less) 3. The compressive strength of post-baking is reduced value than pre-baking and if it is rich mixture, its width is increased, and the more the mixture factor of polystyrene beads is increased, the more its width is reduced.
朴春根,徐利洙,朴仁東 동아대학교 공과대학 부설 한국자원개발연구소 1986 硏究報告 Vol.10 No.1
It is important to design a pump suction sump with proper dimensions and configuration which will greatly influence the pump performance. This study was carried out to examine pump performance caused by vortex phenomenon and to research relation between critical submergence and width of suction sump, bell to bottom clearance, bell to rear wall clearance and suction bell outer diameter. The results obtained by this experiment are as follows. Sc is decreased with the increase of suction sump width x, and though the variation of Sc with variation Y is not clearly observed, in general, Sc tends to decrease with the increase of Y. Sc is increased with increase of Z and velocity, but Sc is decreased with the increase of D.
朴春根,全哲昊,徐海成 동아대학교 공과대학 부설 한국자원개발연구소 1984 硏究報告 Vol.8 No.2
A numerical and experimental study have been performed on the heat transfer in rectangular solid owned heat source. The effects of thermal conductivity k, heat transfer coefficient h, temperature of surrounding fluid To and the rate of heat flow Q were studied numerically by F. E. M. The experiment were studied by given rectangular solid. The results of F. E. M. and experimental are as follows. 1) The F. E. M. to calculate the temperature distribution in rectangular solid showed good agreement with experimental. 2) Thermal conductivity influenced strongly temperature distribution in the solid but heat transfer cofficient influenced only surface. 3) Temperature gradient in the solid was unconcerned by temperature of surrounding fluid and rate of heat flow but temperature in the solid changed at a fixed rate.
學校建築의 設計計劃에 관한 硏究 (Ⅱ) : 學校施設關係令 및 施設水準에 관한 考察 Servey of School Facility and Standard
朴春根,兪吉濬 동아대학교 공과대학 부설 한국자원개발연구소 1986 硏究報告 Vol.10 No.1
This study is on the point at issue of primary and middle school building planning to the betterment of teaching environment. The conclusions are as follows ; 1. It need to establishment of definition about the land areas occupied by school and improvement about the standard of land areas. 2. It need to flexibility of the school building design and regulation about the standard of building areas.
박남천,채건식,김영국,설정식,손인호 慶南大學校 附設 基礎科學硏究所 1997 硏究論文集 Vol.10 No.-
We have measured the energy gap in ZnSe as a function of temperature by Laser-Generaeted Photocharge Voltage Spectroscopy(PVS). Trap levels were calculated quasi equibrium, peak shape, initial rise methods. And We have measured the Photocharge Voltage as a function of temperature with varing heating rate. The trapping cross-section of ZnSe was calculated by the methods of Grossweiner.
日本의 海岸砂防에 관한 연구(II) : 沖繩縣의 海岸保安林을 중심으로;On Seaside Protection Forest in Okinawa Prefecture
全槿雨,李在善,朴完根,幸喜善福,中島勇喜,江崎次夫 江原大學校 森林科學硏究所 2004 Journal of Forest Science Vol.20 No.-
우리나라에 있어서 海岸林의 多面的 機能과 時代的 價値觀의 변화를 파악하고, 海岸砂防의 참고자료를 얻기 위해 일본의 海岸林과 海岸砂防에 대한 각종 자료를 수집·분석하고 있다. 전보(全槿雨 등, 2002)에 이어 日本 沖繩縣의 海岸防災林을 중심으로 海岸林의 槪要, 海岸保安林의 實態와 각 島嶼別 주요 海岸砂防用 樹種 및 대표적인 海岸保安林에 대하여 분석·정리하였다. Management system of coastal erosion-control forest in Japan together with coast sand dune fixation and stabilization were investigated and analyzed to introduce to Korean researchers the many-sided importance and function of coastal forest and its chage from the standpoint of social value. In this study some suggestions and ideas were proposed for establishment of coastal forest including some suggestions and idea were proposed for establishment of coastal forest including seaside protection forest characteristics and tree species for coastal dune fixation, based on the analysis of date which were collected from the seaside protection forest in Okinawa Prefecture in Japan.
박남천,송재홍,채건식,오재근,김영국,손인호 慶南大學校 附設 基礎科學硏究所 1995 硏究論文集 Vol.7 No.-
We studied the native defects of dilute magnetic semiconductors Zn₁-xFexSe epilayer by using SAW device. The energy gap of Zn₁-xFexSe for each epilayer(x=0.0213, 0.0915) was 2.57eV, 2.74eV at room temperature (294K). The trap level for x=0.0213, 0.0915 were calculated by measuring Transverse Acoustoelectric Voltage(TAV). Also we can calculated cross section.
朴春根,全哲昊,徐海成 동아대학교 공과대학 부설 한국자원개발연구소 1983 硏究報告 Vol.7 No.2
A numeical and experimental study has been performed on heat transfer in square duct. The effects of distant P between dry solides and Reynolds number were studied numerically by Finite Element Method(F.E.M.) The experiment were studied according to F.E.M. analysis by Universal Digital Measuring system. The results of F.E.M. analysis and experimental are as follows. 1) Comparison between mumerical and experimental results showed good agreement. 2) Heat transfer increases according to decrease of the P/D ratio and increase of H/L ratio too.
非定常流의 亂流領域에서 오리피스 形狀에 따른 損失 및 流量에 관한 實驗的 硏究
朴春根,徐利洙 東亞大學校 大學院 1984 大學院論文集 Vol.8 No.2
To loss and discharge coefficients of several types of orifices are studied experimentally for Reynolds numbers for 10⁴to 10?, and square-edged and sharp-edged orifices are varied thickness and angle of inclinations. experimental results, for thickness front direction of flow scarcely ever be varied loss and discharge coefficients, but back direction of flow are changed loss and discharge coefficients when angle of inclination are varied, for back direction of flow if angle of inclination be increased, loss coefficients be decreased and discharge coefficients be increased.