건축물 파사드 디자인에 관한 연구 : 광주직할시 사무소 건축물을 중심으로 Focused on the Office Building in KwangJu City

이청웅,김주연 조선대학교 국토개발연구소 1994 국토개발연구 Vol.14 No.2

Continuously increasing this office buildings become to funtion gradually as mani element constituting municipal space and up to now, this buildings have repeated only increase of guantity of scale ; but gradually, because of improvement of a line of thinking and increase into gualitative demand, the demands that con give buildings symbology, artistic value, municipal characteristics, and etc have increased. And also, as not individual characer but a part of municpal environment, the office buildings in city constitue municipal image that has close relationship with the public life, and this is so-called the main element which creat municipal environment actively ; this buildings creat scenery of the street, and compose the public space, etc. So, in future, the office buildings need design of appearance form that can coincide with the region and work general and affirmative function, and to attain this purpose, first of all, we must grasp image and characteristics of a decorative design and moulding which office buildings have precisely. To correspond which this demand, in this study, I Would investigate how optical image is, in a view of owner, in order to focus optical side of human, when we plan the font pasad of building which prescribe the external form of buildings, and a variable which gives form to image in moulding.

상부요로계감염 환자에서 Gallium-67 Citrate 스캔 및 Tc-99m Dimercaptosuccinic Acid(DMSA)스캔의 임상적 의의

이강욱,강민규,장윤경,양종오,이상주,박기현,소영,신영태 충남대학교 의과대학 지역사회의학연구소 2000 충남의대잡지 Vol.27 No.2

It is often not certain whether the focal defect of renal cortex of Tc-99m Dimercaptosuccinic acid(DMSA) renal scan in patients with acute pyelonephritis means the cortical scar by previous inflammation or recent active inflammatory lesion. Gallium-67 citrate(Ga-67) also has been known to be accumulated at the active inflammatory lesion. In order to evaluate the usefulness of the Ga67 and Tc-99m DMSA renal scan in patients with acute pyelonephritis, we reviewed the results of both study and clinical findings. Nintecn patients with typical clinical findings of acute pyelonephritis and admitted to our institute from Jan. 1998 to Nov. 1998 were included in this study. Tc-99m DMSA and Ga-67 scan were performed mean 3.3 and 7.3 days after admission. Eleven of 19 patients (57.9%) showed abnormally increased focal renal uptake on the Gallium-67 citrate scan and 14 of 19 patients(73.7%) had a cortical defect on the kidneys in Tc-99m DMSA scan. Seven(36.8%) patients had an abnormality in both study. Seven(36.8%) patients had an abnormality only in Tc-99m DMSA scan and 4 (21.1%) patients had an abnormality only in Ga-67 scan. Of 7 patients who had an abnormality on both scan, 5 patients had. an abnormality at same region in both scan and 2 patients had an abnormality at the different sites on the kidneys. With the above results, we speculate that Ga-67 scan and Tc-99m DMSA scan play a complementary role in the patients with upper urinary tract infection.

치아삭제에 따른 유치법랑질의 산부식 양상과 레진전단결합강도에 관한 연구

이긍호,이연주 大韓小兒齒科學會 1992 大韓小兒齒科學會誌 Vol.19 No.1

The purpose of this study was to determine the effects of etching time and reduction depth on the etching pattern of primary anterior teeth, and the shear bond strength of composite resin. The 156 primary upper central incisors and lateral incisors recently exfoliated were used. They were stored in physiologic saline solution till they were prepared for this study. They were divided into three groups according to reduction depth, and each group was subdivided into four sub-groups according to etching time. GroupⅠ- Fifty-two teeth were subdivided into 4 groups according to etching time of 15, 30, 50 and 120 seconds. Enamel of these teeth were not reduced, but only the prophylaxis using pure pumice with rubber cup was performed. GroupⅡ- Fifty-two teeth were subdivided by the same manner as the group Ⅰ. Enamel was reduced only enough to remove the prismless layer(approximately 30um in thickness) using an abrasive white stone(Shofu Inc., Japan) and was polished using sand paper strip(#600). GroupⅢ-Fifty-two teeth were subdivided by the same manner as the group Ⅰ. Enamel was reduced about 0.4-0.5mm using diamond point(Edenta AG Switzerland 877.31.010 FG), and polished using abrasive white stone and sandpaper. From the each subgroup, tooth, total of 12 teeth, was selected randomly, and then prepared for the SEM. One hundred and forty four teeth were prepared for evaluation of the shear bond strength of composite resin to enamel. The shear bond strength of composite resin bonded to enamel of each specimen was tested with a universal testing machine. The results were as follows; 1. In all groups, the type 2 etching pattern(by Silverstone), in which the prism cores were left intact and prism peripheries were lost selectively, was observed. 2. The effective etching time was 60 seconds in group Ⅰ and 30 seconds in group Ⅱ(p<0.05). 3. In group Ⅲ, there was no significant difference in etching pattern according to etching time. 4. In the cases of which etching time was 15 and 30 seconds, the shear bond strength was greater in group Ⅰ than in group Ⅱ and Ⅲ(p<0.05), however in the cases of which etching time was 60 and 120 seconds, there was no significant difference among three groups.

연구개의 이소성 뇌조직 - 1예 보고-

최현주,이연수,김영신,이교영,강창석,심상인 대한병리학회 1998 Journal of Pathology and Translational Medicine Vol.32 No.11

폴리프로필렌을 이용한 경량바닥재 개발

이윤수,주명기 강원대학교 부설 석재복합신소재 제품연구센터 2003 석재연 논문집 Vol.8 No.-

본 연구에서는 강도 및 내구성이 우수한 폴리프로필렌을 이용한 경량바닥재를 개발할 목적으로 중질탄산칼슘 및 폴리머를 결합재로 하고 목분을 골재로 한 폴리머 모르타르를 제조하여 폴리머 모르타르의 흡수율, 휨 및 압축강도에 미치는 목분 혼입량의 영향에 대하여 검토하였다. 그 결과로, 폴리머 모르타르의 흡수율은 목분혼입량의 증가에 따라 증가하는 경향을 보였다. 또한 폴리머 모르타르의 휨 및 압축강도는 목분 혼입량의 증가에 따라 감소하는 경향을 나타냈다. In this study the lightweight polymer composites were made in which the polypropylene as binder, the heavy calcium carbonate as filler, the splinter as aggregate. The effects of splinter content on the water absorption, flexural and compressive strengths of lightweight polymer mortars with polypropylene and splinter are examined. As a result, the water absorption of the lightweight polymer mortars with polypropylene tend to increase with increasing splinter content. The flexural and compressive strengths of the lightweight polymer mortars with polypropylene tend to decrease with increasing splinter content.

외부온도에 따른 폴리머 콘크리트의 강도특성 변화

이윤수,주명기,최만용 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

불포화 에스터 수지의 큰 이용분야의 하나로 건축재료가 있으나 여기서 가장 문제로 되어 있는 것이 바로 열적 특성의 개선이다. 따라서 본 연구에서는 외부온도가 폴리머 콘크리트의 강도특성에 미치는 영향을 검토하기 위하여 외부온도 20∼120℃ 범위로 하여 폴리머 콘크리트의 물리·역학적 특성을 구명하는데 목적이 있다. 본 연구에서는 불포화 폴리에스터 수지를 결합재로 하고 탄산칼슘을 충진재로, 규사를 잔골재로 치환하고, 굵은골재를 쇄석으로하는 폴리머 콘크리트를 제조하여 외부온도에 따른 강도특성을 검토한 바, 폴리머 콘크리트의 사용 적정온도는 50℃이내가 적당할 것으로 판단되며, 50℃이상에서 사용할 경우는 난연성이 우수한 탄소섬유를 사용해야 할 것이다. In this study, the polymer concrete was made to investigate its strength properties, in which unsaturated polyester resin was used as s binder, calcium carbonate as the filler and silica sand as th fine aggregate, and crushed stone as the coarse aggregate. The effects according to the external temperature on strength properties of polymer concrete were examined. Test result showed that the compressive, flexural and tensile strengths of the polymer concretes decreased with increasing external temperature. The elasticity of modulus of the polymer concretes decreased with increasing external temperature.

높은 휨강도를 갖는 시멘트 모르타르 및 콘크리트의 개발

이윤수,주명기 강원대학교 부설 석재복합신소재 제품연구센터 2003 석재연 논문집 Vol.8 No.-

본 연구에서는 강도 및 내구성이 우수한 프리캐스트 판넬을 개발할 목적으로 폴리머 및 단섬유 혼입한 시벤트 모르타르를 제조하여 시벤트 모르타르의 물리ㆍ역학적 성질에 미치는 폴리머 및 단섬유 혼입의 영향에 대하여 검토하였다. 그 결과로, 고강도 모르타르에서는 보동강도 모르타르에 비해 섬유의 부착강도가 크게 되기 때문에 아라미드의 고장도 섬유를 혼입함에 따라 휨강도는 매우 증가하였다. 또한 폴리머 및 단섬유 혼입에 의해서 고강도 모르타르의 취성이 개선되어 휨 변형에 대한 신장능력이 뚜렷하게 증가하였다. A high flexural strength results in a reduction of wall thicknesses of precast concrete products such as curtain walls and permanent formworks which assists craneage requirements or allows for larger panels. In the previous paper, flexural strength of 24MPa can be attained in water-cured cement mortars by reducing W/C, and using an optimum grading high strength sand. In this study, the effects of polymer-modification and discontinuous short fiber reinforcement on the properties of high strength mortars in the fresh and hardened states were assessed experimentally. The studied variables include polymer-cement ratio(0 to 10%), polymer types(SBR, PAE and epoxy), fiber types(vinylon and aramid), fiber volume fractions(0 to 3%), strength of matrix mortar(compressive strength of 42MPa and 112MPa), and curing conditions(water, wet and dry). The test data generated in this study indicated that improvements in flexural strength and toughness characteristics of air-cured high strength mortars can be achieved by PAE and epoxy polymers with dosage of 10% of the cement amount. It is found that use of high strength fibers such as aramid, not only reduces the brittle nature of high strength cementitious matrices, but also increases the maximum matrix strength.

안구의 비색소성 모양체 상피에서 발생한 유두상 선암종 -1예 보고-

최현주,최영진,이연수,이은정,강석진,김병기,심상인 대한병리학회 1998 Journal of Pathology and Translational Medicine Vol.32 No.12

국내 중소도시 상수도관의 파손특성 및 영향인자 분석에 관한 연구

이현동,정원식,안윤주 대한상하수도학회 2002 상하수도학회지 Vol.16 No.4

This paper was performed to analysis the major factors and characteristics of pipe breaks for urban drinking water pipelines in Korea. The results from the characteristic analysis of pipe breaks by natural cause (77.6%) were showed represented to be highly related to the factors such as deterioration, water hammer, and external factors. And break rate with pipe types were showed PE 0.2056, CIP 0.1521, DCIP 0.06 No./Km/year, respectively. Break rate were showed represented to be weakly related to the pipe diameters, seasons, and laying year. Especially, break rate of winter season were not represented to highly the this study more than other cities such as Newyork, Philadelphia, Seoul, Taegu, Busan.

경량 인조대리석의 강도 개선 및 몰드의 균열저감에 관한 연구

이윤수,주명기 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

본 연구는 경량 인조석 제조공장의 애로사항 중 하나인 낮은 인조대리석의 강도와 몰드의 수축을 개선시켜 제조기술의 경쟁력을 높일 목적으로 수행된 것이다. 본 연구에서는 백색 시멘트 및 고강도 시멘트를 결합재로 하고 강모래를 잔골재로, 굵은 모래를 인공경량골재로 하는 경량 인조대리석을 제조하여 감수제 첨가량, 양생기간 및 경량골재 치환율에 따른 강도특성을 검토하였으며, 가소제 첨가량 및 EVA 첨가량에 따른 몰드의 건조수축을 검토하였다. 그 결과 경량 인조대리석의 휨 및 압축강도는 감수제 첨가량의 증가 및 양생기간의 경과에 따라 증가하였다. 또한 경량골재 치환율의 증가에 따라 강도는 감소하였다. 또한 몰드의 건조수축은 가소제 첨가량이 증가함에 따라 증가하였고, EVA 첨가량이 증가함에 따라서는 감소하는 경향을 보였다. In this study, an artificial lightweight marble was made to investigate the reduction of crack and improvement of strength, in which white cement and high-strength cement were used as a binder, river sand as the fine aggregate, and artificial lightweight aggregate as the coarse aggregate. The effect of shrinkage reducing agent content and of plasticizer content on drying shrinkage and the strength properties of artificial lightweight marble were examined. Test results show that the compressive and flexural strengths of the artificial lightweight marble increased with increasing shrinkage reducing agent content. The compressive strength of artificial lightweight marble decreased with increasing artificial lightweight aggregate content. The drying shrinkage of the mold increased with increasing plasticizer content, and decreases with increasing EVA content.