建物의 部位別 材料의 熱的性能에 關한 硏究 : 外斷熱, 中斷熱 祖積壁을 中心으로

金光瑞,柳泳鎬,梁克永 圓光大學校 1985 論文集 Vol.19 No.2

The study is aimed at offering the basic materials of the effective insulatin supported system in the building construction place by estimating the thermal energy storage number and thermal performance and analyzing theoretical and experimental value in the insulating masonry wall structure. The results obtained were as follows 1. The experimental value of the thermal flow ratio in the inner and middle insulation wall structure is 5 ~ 10% higher than the theoretical value, while the experimental value in the experiment installed edge insulation is 3 ~ 7% lower than the theoretical value. 2. Both the theoretical and experimental value in the outer insulation is similar without the edge insulation construction. 3. If the thickness of each building material is same, "K" value of the wall structure is constant without the position of the insulation materials. But the temperature form in the structure is changeable according to the change of the insulation material position. 4. The experimental result of the thermal flow ratio like the theorectical function is in proporsition to the thermal transmission of the insulation materials. 5. The domestic insulation material capacity was confirmed by abtaining a desirable value from the thermal experiment of the outer wall installed by the domestic insulation materials, STYROPOR, and ISOPINK. In case of the middle insulation wall structure, the thermal resistance, 0.09㎡ h℃/kcal is obtained in the construction between the wall structure materials and insulation. 6. In case of the middle insulation wall, which is constructed only in korea, there is so large a difference of the thermal flow according to the outer wall's right edge, there is or not the edge-beam insulation of outer wall and construction sureness that extra insulation structure construction is necessary. When the cement masonry wall is installed by the insulation materials in indoor, outdoor and middle wall. The following results are gained through the analysis of the thermal performance. 1) In the outer and middle insulation wall structure, according to the increase of the insulation material thickness, the energy storage storage number is increasing but decreasing oppositely in the inner insulation wall structure. The erergy storage number depends on the position of the insulation materials. 2) The increase of the vapor expansion resistance ratio is in proporsition to the thickness of the insulation materials without the installation position of the insulation materials. 3) The relation of phase, the scale of which is the largest in the outer insulation, second in the inner insulation, third in the middle insulation, is in proporsition to the thickness of the insulation materials. 4) According to the outer air temperaure, the change of the indoor surface temperature reaches 20℃ by increasing the thickness of the insulation materials that it makes the indoor environment comfortale in the thermal point.

방위특징 탐지 단순신경세포들의 배열순서에 관한 연구

김길중,김정국,서광명,서용수 동서대학교부설연구소 1998 연구소 논문집 Vol.3 No.-

Cells in avisual cortex line in columns which are perpendicular to the cortical surface and the cortical cells in a column prefer to respond to an orientation of each line segments of an sesory image. orientation preference of each cortical column is highly correlated to those of nearbycolumns and varies smoothly anlong the surface of the cortex. To elucidate the mechanism of this columnar organization, we propose a simple model consisting of orientation selective neruons(OSNs) with local facilitation and lateral inhibition. it is playsible that modifiable connections play an important role in forming and refining the organization togher with the sensory experience. Thus the feed-forward connections between OSNs and LGN cells are modifiable. The interactions between OSNs in the same layer take place by way of feedback pathways and are excitatory and inhibitory. The behavior of the model is described by a STM equations of Growwberg and critical parameter of negative one dimensional ??G function, σ would give variety to the differences in detected orientations.

建物의 部位別 材料의 熱的性能에 關한 硏究 : 內斷熱 組積壁을 中心으로

金光瑞,梁克永,柳泳鎬 圓光大學校 1984 論文集 Vol.18 No.2

This Research is the basic study on the thermal performance of internal thermal insulating masonry structure, the experiment of the heat flow, for the efficiency at the spot of the insulating structure through the thermal copacty experiment. We gained that conclusion by comparing such results through the 12 external experiments.

벼 잡종초기세대에서 이삭줄기 대유관속 수와 이삭 특성의 분리양상

김광호,안종국,서경인 建國大學校附設農業資源開發硏究所 2001 農資源開發論集 Vol.23 No.-

The segregation modes and the selection efficiency of large vascular bundle(LBV) number and panicle characteristics were measured in three hybrid populations of rice. F_1 plants of the three crosses showed different direction and degree of dominance in vascular bundle number and panicle characteristics. The panicle neck diameter(ND), number of primary branches(PB) and LVB showed a typical normal distribution in F_2. When F_2 plants were divided into two groups up culm length of 90cm, the distribution of LVB number and panicle characteristics were not different between two populations. The selected and non-selected F_3 populations showed no difference in distribution of LVB number and panicle characteristics. However, F_3 populations grouped by culm length of 90cm showed different distributions in LVB and 100-grain weight among six characteristics observed. In F_2 populations, ND showed positive correlationship with PB, LVB number and grain number per panicle(GN). ND was positively correlated with PB, LVB number, GN and panicle length in selected and non-selected F_3 populations.

炭素鋼의 摩擦熔接에서 熔接面의 形狀에 관한 硏究

鞠賢雨,閔宅基,金光日,金茂成 忠南大學校 産業技術硏究所 1994 산업기술연구논문집 Vol.9 No.2

This report deals with a study on figure of friction welding of carbon steel. It is investigated to vary figure. Main result obtained in this study are as follows; 1) In friction welding of carbon steel, the optimization of figure experiments on several type [C(120 )>A(180 )>B(150 )>D(90 )type]. The optimization of figure is C-type(120 ) 2) The tensile strength under 1.0-1.4sec heating time is shown 43.2kgf/㎟, which is the higher than base metal (42kgf/㎟) in C-type. 3) The horizontal hardness is similar to base metal. Heat affected zone where hardness is lower than base metal spreads 3mm far from the friction weld interface in C-type

발육중인 생쥐 하악 과두에서 연골 및 골의 특이 유전자 발현

지국섭,윤영주,박주철,김광원 대한치과교정학회 2004 대한치과교정학회지 Vol.34 No.2

하악과두 연골이 발생하고 분화하는 과정에서 나타내는 특성을 규명하기 위하여, 발생 16, 18일과 출생 1일, 5일, 10일, 20일 및 30일 후의 ICR생쥐의 하악과두를 형태학적으로 분석하고, 생쥐 Ⅰ형, Ⅱ형, X형 교원질, Indian hedgehog(IHH) 및 BMP-4 등의 mRNA 발현을 in-situ hybridization 방법으로 연구하였다. 1. 생쥐 Ⅰ형 및 Ⅱ형 교원질 mRNA는 하악과두의 발생 및 성장과정에서 모두 발현되었다. Ⅰ형 교원질 mRNA는 휴지층과 증식층의 상부에서 관찰된 반면 Ⅱ형 교원질은 휴지층과 증식층 그리고 비대연골층의 상부에서 관찰되었다. 2. 하악과두 연골은 성장에 따라 비대연골층이 계속 증가하는 소견을 보였으며, 비대 연골층의 세포들은 특징적으로 X형 교원질 mRNA의 발현을 보였다. 3. BMP-4 mRNA는 하악과두 연골 원기와 골화중인 하악골체에서 모두 발현되었다. 4. IHH mRNA는 하악과두의 발생과정에서 증식 연골층의 하부와 비대연골층의 상부에서 선택적으로 관찰되었다. It has not been elucidated whether the initiation of condylar development of the mandible is related with the periosteum of the mandible, or if it derives from a separate programmed blastema not related with the mandible. Also, although the mandibular condylar cartilage is known to promote growth, few studies have dealt with molecular-biologic mechanisms such as the expression of specific genes according to the differentiation of the mandibular condyle. To elucidate the unique cellular characteristics, development, and differentiation process of the mandibular condyle, an examination of expressions of genes characteristic of cartilage and bone were carried out using RT-PCR and mRNA in situ hybridization. 1. Type?collagen mRNA was detected with type Ⅱ collagen mRNA in the differentiation and growth process of the cartilage of the mandibular condyle. Type Ⅱ collagen mRNA was demonstrated in the whole resting and upper part of the proliferative zone, whereas type Ⅱ collgen mRNA was observed in the resting, proliferative and upper hypertrophic cartilage zone of the mandibular condyle. 2. The condylar cartilage rapidly increased in size due to the accumulation of hypertrophic chondrocytes as characterized by the expression of type Ⅱ collagen mRNA during postnatal development. 3. BMP-4 mRNA was present in the anlage of the future condylar process and also in the ossifying mandibular body. 4. IHH mRNA was limited exclusively to the lower part of the proliferative zone and the upper part of the hypertrophic cartilage zone during condylar development. These findings were different from those in the growth-plate cartilage of the long bone, indicating a characteristic feature of the differentiation of the chondrocytes in the condylar cartilage present in prenatal and postnatal development. Furthermore, it was also suggested that chondroblasts of condylar cartilage rapidly differentiate into hypertrophic chondrocytes with increased functional Load force such as muscle activity and mastication.

작업일보를 이용한 현장관리시스템 개발에 관한 연구

나광수,김태희,김선국 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

The management of working manpower is very important due to the variety of work trades and activities. Although various project management systems have been developed to effectively deal with various tasks in site, they are not in practical use due to the non-cooperative attitude of sub constructors. This is the reason the systems are not developed in the focus of sub constructors, but main constructors and the detail information about daily report is omitted or lost in the collection process by constructors. Therefore, this paper is to propose a system that collects the information about daily reports prepared by sub constructors and uses it to manage sub constructors' workers efficiently. The sys is applied to manage, based of internet, the workers in site by real time.

정상교합자의 미소시 구순 형태에 관한 연구

지국섭,김광원 대한치과교정학회 1996 대한치과교정학회지 Vol.26 No.2

이 연구는 악안면 영역의 심미적 개선에 필요한 미소의 형태에 대한 기준을 설정하기 위하여 시행하였다. 성인 정상교합자 62명(남자:30명, 평군연령;22.7세, 여자;32명, 평균연령;21.8세)을 대상으로 안정위시와 미소시의 얼굴 정면 사진을 촬영하였고, 미소시 입술의 형태변화, 그리고 입술과 치아와의 관계를 계측, 분석하였다. 이 연구로부터 얻어진 결과는 다음과 같다. 1. 하순 상연의 만곡과 상악 절단연과의 평행관계인 smile line ratio는 0.09이었고, buccal corridor ratio는 0.63, smile symmetry ratio는 0.96이었다. 2. 미소시 양 구각주 간의 거리는 안정위시 구각부 간 거리의 1.31배였으며, 얼굴 폭의 0.48배였다. 3. 미소시 상순의 수직길이는 안정위시 길이의 0.69배였고, 하순의 수직길이는 안정위시 길이의 0.96배였다. 4. 상악 전치의 노출량은 9.96mm이었고, 상악 전치의 노출은 미소시 상순의 수직길이의 변화율이 었고, 미소시 구각부 길이의 비, buccal corridor ratio등과 관계 깊었다. This study was performed to mark the criteria of the eathetic smile that was necessary to improve the esthetic problem in oral maxillo-facial region. The facial straight photographs of 62 adults(30 males, 32 females : 19-24 years old) in resting position and during smile were taken. The measurements and proportion of lip-teeth relationship during smile were statistically analized with photogrammetry. The following results were obtained: 1. In the evaluation of the change of lips, smile line ratio was 0.93, buccal corridor ratio was 0.63, and smile symmetry ratio was 0.96. 2. The width of mouth during smile was 1.31 times of the width in the resting position and 0.48 times of face width. 3. The upper lip height during smile was 0.69 times of the height in the resting position and the lower lip height during smile was 0.93 times of the height in the resting position. 4. The mean exposed lenght of upper central incisor was 9,.96mm. Maxillary incisor exposure was significantly correlated with the upper lip change ratio, mouth width changer ratio, and buccal corridor ratio.

유동층을 이용한 탈황제의 마모특성에 관한 연구

오광중,김형국,최은화,조기철 부산대학교 환경문제연구소 1999 環境硏究報 Vol.17 No.1

For the efficient energy use and the protection of environmental pollution, attrition characteristics, depending on the component and the condition of sorbent for the purification of fuel gas, were analyzed by a fluidized-bed tester. Results of these studies can be summarized follows. 1) When Mn-based sorbent(M, MT, MFT) prepared with varying addictives and induration conditions was compared in terms of particle size distribution and AI(Attrition Index), MT and MFT possessing TiO2 and Fe203 had much higher attrition resistance than M. Attrition resistance of M, MT and MFT increased as bentonite contents and induration temperature increased, when bentonite contents induration temperature were changed from 2 to 5% and from 1000 to 1100℃, respectively. Therefore when powdery catalysts are prepared, the attrition rate can be considerably affected by the controls of addictive, binder and induration temperature. 2) Attrition tests using MT1100-5 were performed under the conditions that particle size distribution was uniform and had much more over +270mesh and under -325mesh. AI due to attrition was 8.83, 21.54 and 1.67%, respectively. Thus, initial particle size distribution showed a great influence on both produced fines distribution and attrition loss. Therefore, the size distribution of particles injected initially and the particle size that carried over showed be considered to reduce the loss of particulate materials and the replacement cost due to attrition. 3) An experiment using MT1100-5 sorbent was also carried out to predict AI as a function of time and particle size distribution during 23hr. AI of prepared sorbent was 4.54, 7.73, 9.08, 11.35 and 12.48 after 1.5, 3, 5, 9 and 23hr. respectively. Thus, it was shown that the amount of produced fines during the same time was shorten with the increase of time. The operating condition of dust capturing equipment and the rate of powder exchange needs to be considered because most of the fines due to fluidization of particulate material was generated at initial operation.

建築材料의 熱傳導特性에 關한 硏究 : 콘크리트 熱傳導率을 中心으로 Laying Stress on the thermal conductivity concrete

梁克永,金光瑞 圓光大學校 1984 論文集 Vol.18 No.2

This object aims to study the influence of different kind of building raw materials of thermal conductivities upon concrete by experiment and came to the conclusion as follows. 1. When the unit quantity of cement and fine aggregate showed the rate of increase the thermal conductivity is appeared to be higher figure. 2. Even in the unit weight of cement, fine aggregate ratio and water cement ratio are equal, the figure of the thermal conductivities of different kinds of aggregates. because the materials such as slag, of which the surface are rough, have strong adhesive power of aggregate and mortar, is relatively appeared to be high. But on the other hand as the materials such as texes, of which the surface are smooth have weak adhesive force, the figure of the thermal conductivity is appeared to be low.