불투수성 아스팔트의 구조성능에 관한 실험적 연구

김인중, 김경진 韓國交通大學校 1967 한국교통대학교 논문집 Vol.51 No.-

An existing asphalt pavement has a case that is broken in a short period of time to the public degradation of durability often occurs. Also it exerts a serious influence on the stability of the structure in the penetration of chlorides, such as excellent by the porthole caused by the porosity of the asphalt pavement. Therefore, economical packaging technique is required to increase the common period to increase the durability. A study of the asphalt pavement to date made for the general study of the water impermeable asphalt mixture of asphalt is insufficient state. Therefore, this study was carried out to minimize the porosity of the performance review of the new concept of packaging material with impervious asphalt properties.

불투수성 아스팔트의 신도성능에 관한 실험적 연구

김경진, 김인중 한국교통대학교 2017 한국교통대학교 논문집 Vol.52 No.-

In order to ensure the stable quality of the asphalt pavement, the asphalt binder must secure sufficient deformation capacity at low temperatures as well as adhesion and elasticity of the asphalt binder itself. This study aims to enhance the performance of asphalt binder at low temperatures, comparing the performance of the asphalt binder that is currently commercialized and the asphalt binder manufactured based on macromolecule GMA Styrene resin(Styrene Isoprene Styrene, SIS). Ductility test was performed for this. The result has shown that the newly manufactured binder had higher viscosity and ductility at low temperature than the current binder, and also excellent in adhesion and elasticity.

백서에서 당뇨유발후 미세혈관 문합술에 대한 실험적 연구

조경숙,김한중 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.1

The comparative risk of microvascular anastomotic failure in diabetic patients undergoing more routine reconstructive procedures is unknown because of the small number of diabetic patients in published clinical series. While the suggestion that diabetes be regarded as a contraindication to microsurgery is probable not justifiable, this study confirms the theoretical possibility that diabetes has a deleterious effect on anastomotic healing. A study of the process of endothelial healing and of patency rates in microvascular anasotmoses in the diabetic state has been undertaken in an animal model using scanning electron microscopy. The mean area of re-endothelialisation at 10 days,200 microns on either side of the experimental microarterial anastomosis was 61.3% in non-diabetic controls compares to 16.6% in the untreated diabetic group and 13.2% in the insulin treated diabetic group. The degree of intimal repair was significantly lower in the diabetic group compared to controls.(p<0.01) Defective re-endothelialisation may contribute to anastomotic failure in clinical practice.

자연 교과에서 地域 地質素材의 活用에 관하여 : 지묘동 일대 암석을 중심으로 focusing on the rocks in Chimyo-dong area

金在慶,金重旭 大邱敎育大學校 科學敎育硏究所 1989 과학·수학교육연구 Vol.13 No.-

The field geologic materials which are applicable to the geology unit in science textbook are investigated in Chimyo-dong area. It is found that this area offers several unique advantages in topography and geology which are as follows. First, this area is geographically located in the suburbs of Taegu and thus is easily accessible by bus. Secondly, the principal rock units in this area are composed of conglomerate, sandstone, mudstone, shale, basalt, granite, and gneiss etc. Thirdly, many outcrops are topographically exposed along the road cut and streams crossing the rock units. These outcrops are densely spotted to narrow area of Chimyo-dong and show large three-dimensional views of tops or bottoms freshly. And finally, geological features and data of each site are applicable to the learning subjects in teacher's guidebook for the science textbook. It is suggested that Chimyo-dong area is very suitable to field trip for further understanding of the geology units in science textbook of primary school.

麥酒麥의 (1-3,1-4)-β-glucanase 遺傳子의 構造와 發現 樣狀

유남희,윤성중,최경구,김제환,박충웅 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.16 No.-

禾穀類 種子 發芽時 호분층과 ??組織의 細胞壁에 多量 含有되어 있는 (1-3, 1-4)-β-glucan을 分解하여 種子의 發芽에 必要한 加水分解酵素의 分泌 및 擴散 浸透를 돕는다. 本 硏究에서는 國內 麥酒麥의 (1-3, 1-4)-β-glucanase 遺傳子의 構造 및 發現 에 대한 基礎 情報를 얻기 위하여 生化學的 및 分子生物學的 方法을 利用하여 發芽種子 및 어린 잎에서의 酵素活性과 遺傳子의 發芽樣狀 그리고 遺傳子의 構造 等을 調査하였다. 麥酒麥 發芽種子中 (1-3, 1-4)-β-glucanase 活性은 發芽 7日째에 제일 높았다. (1-3, 1-4)-β-glucanase의 活性測定에 使用한 (1-3, 1-4)-β-glucan이 (1-4)-β-glucanase에 의해 分解될 可能性이 있으므로 (1-4)-β-glucanase의 活性도 測定하였는데 (1-4)-β-glucanase의 活性이 매우 낮게 나타나서(1-4)-β-glucanase가 (1-3, 1-4)-β-glucanase을 分解하여 (1-3, 1-4)-β-glucanse의 活性에 影響을 미쳤을 可能性이 매우 낮았다. 麥酒麥의 (1-3, 1-4)-β-glucanase 遺傳子 構造를 PCR을 利用하여 調査하였던바 國內 麥酒麥의 (1-3, 1-4)-β-glucanase 遺傳子 構造는 外國의 다른 品種들이나 귀리의 遺傳子 構造와 대단히 類似하였다. 酵素活性 測定과 귀리의 (1-3, 1-4)-β-glucanase cDNA clone을 ?識子로 利用한 보리의 mRNA 分析에 의해서 發芽傳子 및 어린 잎에서 (1-3, 1-4)-β-glucanase가 種子發芽 以外에도 生育中인 組織細胞의 伸張과 發育 및 β-glucan 再利用에 泌要한 β-glucan 代謝에 關與하고 있음을 示唆하는 結果라 생각된다. (1-3, 1-4)-β-glucans hydrolysis of cell wall (1-3, 1-4)-β-glucanas accompanies degradation of endosperm cell walls during cereal seed germination. To investigate (1-3, 1-4)-β-glucanase expression pattern in Korean malting barley, (1-3, 1-4)-β-glucanase activity, gene structure and mRNA expression patterns werre examined. (1-3, 1-4)-β-glucanase activity increased as germination proceeded and the highest enzyme activity was detected in seeds germinated for 7 days. Because (1-4)-β-glucanase have a potential to degrade (1-3, 1-4)-β-glucans, (1-4)-β-glucanase activity was also determined. (1-4)-β-glucanase activity, however, was very low minimizing possibility of (1-4)-β-glucanase action on (1-3, 1-4)-β-glucan substrate. PCR technique was employed to investigate (1-3, 1-4)-β-glucanase gene structure. The amplification product of the expected size from the targeted sites of Dusan #29 indicated that (1-3, 1-4)-β-glucanase systems were conserved in different barley varieties and even in oats. (1-3, 1-4)-β-glucanase activity and mRNAs were detected in young leaves as well as in germinating seeds. This may suggest that (1-3, 1-4)-β-glucanase are also involved in β-glucan metabolism required for cell elongation and β-glucan reutilization during leaf growth and developmetn.

한국인 태아 및 사산아에서 얼굴신경에 대한 형태학적 연구

강양수,김종중,김복,정상봉,문영민,설경수,정윤영 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.3

It is critical that the accurate anatomy of the facial nerve IS known for uncomplicated successful facial surgery. Such an operation is hazardous because of the intimate relationship between the facial nerve and the expressional muscles. It is hoped that such basic information will be helpful to those who treat conditions involving the facial region. In order to define the detail of this relationship, many studies have been undertaken on dissected adult specimens. This study was based on Korean fetus and stillborn infant cadaveric dissections, and describes anatomical variations of the peripheral branches of the facial nerve that pose a potential danger in a number of surgical procedure on the face. The branching patterns were classified into six types: the frequencies of occurrence were: type I, 4.9%; type II, 24.4%; type III, 34.1%; type IV, 19.5%; type V, 12.2%; and type VI, 4.9%. Types II, III and IV together accounted for almost 80% of the specimens. In the discussion we compare the results of the present study with those of others and try to clarify the anatomical characteristics of the facial nerve in infants, which demand that special attention be paid to the avoidance of injuries during facial surgery.

ESPI法을 利用한 點 熔接部의 面內變位 測定에 關한 硏究

차용훈,김덕중,이연신,채경수,성백섭 조선대학교 생산기술연구소 1997 生産技術硏究 Vol.19 No.1

Electronic Speckle Pattern Interferometry(ESPI) using the Model 95 Ar laser, a video system and an Image processor was applied to the in-plane displacement measurements. Unlike traditional strain gauges or Moire method, ESPI method requires no special surface preparation or attachments and can be measured in-plane displacement with no contact and real time. In this experiment specimen was loaded in parallel with a loadcell. The specimen was the cold rolled steel sheet of 2mm thickness. which was attached strain gauges. The study provides an example of how ESPI have been used to measure strain displacement in this specimen. The results measured by ESPI compare with the data which was measured by strain gauge method in tensile testing.

용접판재의 피로강도에 미치는 잔류응력 평가

차용훈,김덕중,이연신,채경수,성백섭,박회식 조선대학교 동력자원연구소 1997 動力資源硏究所誌 Vol.19 No.1

The objective of this thesis is to investigate the influence of the initial residual stress on the fatigue crack growth after the distribution of the initial residual stress is measured when the crack is growing from the compressive residual stress to the tensile residual stress field. In the case of as welded material, respective of load ratio, the span of the fatigue is the shortest in base metal, while in weld metal and HAZ, the crack growth was retarded due to the effect of the compressive residual stress at the crack tip as well as the span of the crack is longer than base metal. In region II that is in stable growth state of the fatigue crack, da/dN=C(ΔK)^m of power law was satisfied. Also, it was considered that the value of m is not affected by residual stress. Superimposing welding residual stress intensity factor K_res on ΔK, the value of ΔK_eff calculated was lower than ΔK in the same value of da/dN, while the ΔK_eff is almost the same at the high ΔK.

사람의 비후성 반흔에서 면역조직화학기법에 의한 형질전환인자 알파와 표피성장인자 발현의 차이에 관한 면역조직화학적 연구

박영란,김현곤,김종중,문정석,송준섭,설경수,정윤영 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.2

Background and Objectives: Transforming growth factor-α (TGF-α) and epidermal growth factor (EGF) are polypeptides which interact with the epidermal growth factor receptor (EGFR) to produce their biological effects. The aim of the present investigation was to elucidate the immunolocalization of TGF-α and EGF in normal human skin, hypertrophic scar with skin graft on soft tissue defect, and postburn hypertrophic scar without graft. Methods: The data presented in this paper focused attention on differences of expression between two kinds of hypertrophic scars in relation to skin graft using immunohistochemistry. Formalin-fixed and paraffin-embedded tissues from 3 normal skin tissues, 3 hypertrophic scars after skin graft and 8 postburn hypertrophic scars without graft were immunolabelled with antibodies directed against TGF-α and EGF. Results: In normal epidermis of skin, strong TGF-α immunoreactivity (IR) was observed in all epidermal layers except the stratum (S.) basale, whereas EGF was immunopositive in a few cells over all epidermal layers. The staining for TGF-α was found in cell membrane, and EGF was seen either diffuse cytoplasmic or peripheral part of cells in normal epidermis. In hypertrophic scar after six months postoperation, TGF-α IR was observed in the upper part of S. spinosum and S. corneum, whereas EGF was diffusely expressed in the S. spinosum, also its intensity was slightly increased compared to normal skin. In hypertrophic scar without skin graft, very strong expression of EGF was detected in the S. spinosum and S. corneum, and intensity of EGF was increased when compared to normal skin and postoperative hypertrophic scar. EGF and TGF-α coexisted in the cells of S. spinosum in normal skin as well as hypertrophic scars. Double-labeled cells were increased in postburn hypertrophic scar compared to normal skin and postoperative hypertrophic scar. In addition, intensity of EGF and TGF-α double IR was the strongest in postburn hypertrophic scar. Conclusion: These results indicate that EGF may have a more complex regulatory role not only in the early stages of wound healing but also in hypertrophic scar.

스마트 공정에 필요한 이상 탐지 방법에 대한 포괄적 실험 연구

Kyeong-Joong Jeong,Jin-Duk Park,Won-Yong Shin 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2

본 논문은 저자들의 기존 연구에서 제안한 이질적 다변량 시계열 데이터에 적용 가능한 두 단계 이상 탐지 방법(T-DAD: Two-stage Deep Anomaly Detection)의 우수성 검증 및 model-agnostic 성질 검증을 위한 포괄적 실험을 보인다. 먼저, 단일 모델을 사용한 state-of-the-art (SOTA) 이상 탐지 방법들과의 비교 실험을 진행한다. 또한, model-agnostic 성질 검증을 위해 다양한 SOTA 방법들을 기저 모델로서 활용한 실험을 진행한다. 이러한 포괄적 실험 연구를 통해 단일 모델 기반의 SOTA 이상 탐지 방법 대비 T-DAD 방법의 우수성을 확인하고, T-DAD 방법 내 기저 모델로서 여러 다양한 결합이 가능하고, 이러한 활용을 통한 성능 개선이 존재함을 관찰한다.