질소이온주입에 의한 알루미늄의 표면개질특성

강혁진(Hyuk-Jin Kangㅠ),안성훈(Sung-Hoon Ahn),이재상(Jae-Sang Lee),김경균(Kyung-Gun Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5

The research on surface modification technology has been advanced to improve the properties of engineering materials. Ion implantation is a novel surface modification technology to enhance the mechanical, chemical and electrical properties of substrate’s surface using accelerated ions. In this research, nitrogen ions were implanted into aluminum substrates which would be used for mold of rubber materials. The composition of nitrogen ion implanted aluminum alloy and nitrogen ion distribution profile were analyzed by Auger Electron Spectroscopy (AES). To analyze the modified surface, properties such as hardness, friction coefficient, wear resistance, contact angle, and surface roughness were measured. Hardness of ion implanted specimens was higher than that of untreated specimens. Friction coefficient was reduced, and wear resistance was improved. From the experimental results, it can be expected that ion implantation of nitrogen enhances the surface properties of aluminum mold.

혈관을 통한 생체항상성과 그에 대한 그리스도교적 인간학의 평가

강혁준 가톨릭대학교 인간학연구소 2000 인간연구 Vol.- No.1

유아 로타바이러스 설사증에 대한 IgY 난황 항체의 효과시험

정동혁, 박효선, 김경미, 정규항, 김강영, 정후길, 윤숭섭, 전호남, 강신영 충북대학교 동물의학연구소 2006 Journal of Biomedical and Translational Research Vol.7 No.2

본문참고

광조형 시스템의 정밀조형을 위한 지지대 자동 생성 시스템 개발

강혁준,이형국,김효찬 동의공업대학 2000 論文集 Vol.26 No.1

Support structures are used to support a component during building process and must be removed once the building is complete. For precise building this paper specified types of support structures by means of geometry characteristics. They are point, line and area. And found a new algorithm for detecting geometries which need support structures. For easy of removing support structure teeth profile generation and interferences avoidance algorithm was studied.

實驗機器의 效率的인 活用을 위한 敎授-學習資料의 開發

姜理錫,남궁척,鄭秀永,權赫茂 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(A)

In this study, teaching-learning processes were reviewed and instructional materials were developed on 15 different tasks and subjects through the combined efforts of 4 departments. Experimental manuals were developed for every tasks and subjects and audio-visual supportive materials, slides, OHP's and models, were made to promote the complete teaching-learning. Tasks and subjects for developed instructional materials are as follows; 1) Sawing on the radial-arm saw. 2) Sawing on the circular, or table, saw. 3) Sawing on the band saw. 4) Sawing with the portable electric handsaw. 5) Planing for thickness. 6) Planing on the jointer. 7) Shaping on the shaper and the router-shaper. 8) Sanding on the sanding machines. 9) Sanding with portable electric sanders. 10) Drilling holes with portable electric drills. 11) Melting practice of cast iron by high frequence induction melting. 12) Method for determining compression strength for foundry sands. 13) NC lathe operation and programming experiment. 14) Electric discharge machine operation and machining experiment. 15) Air flow demonstration experiments.

박달재길(구38번국도) 주행경관 특성에 관한 연구

강혁진 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

This study focused on the characteristic analysis on the driving landscape of Pakdaljaegil. Especially, the study has a concern about the relation between the visual preference and dynamic vision amount change rate. As a type of sequence landscape, the driving landscape can be defined as a continuous and accumulated memory by car driving. By reviewing former related researches, the study had established the frame work for analyzing the driving landscape of Pakdaljaegil. The basic methods the study suggested are using animation and the concept of dynamic vision amount change rate. Then, by using the real movie animation the study could collect the preference rate for every 10 second time frame. And by using Mesh analysis, the vision amount and its change rate were calculated for each time frame. With the SPSS analysis tool, the study had a result of the relation only between the preference and vision amount of distance views. However, the study could get a result of the characteristics of driving landscape of Pakdaljaegil. It could be characterized as a surrounded landscape type by trees near by the road. and also, the study could carefully suggest the possibilities the relationship between the preference and other elements of dynamic vision amount change rate.

Flowable 및 microfill 복합레진으로 충전된 제 5급와동에서 load cycling 전,후의 미세변연누출 비교

강석호,김오영,오명환,조병훈,엄정문,권혁춘,손호현 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.2

Low-viscosity composite resins may produce better sealed margins than stiffer compositions (KempScholte and Davidson, 1988; Crim, 1989). Flowable composites have been recommended for use in Class V cavities but it is also controversial because of its high rates of shrinkage. On the other hand, in the study comparing elastic moduli and leakage, the microfil had the least leakage (Rundle et al. 1997). Furthermore, in the 1996 survey of the Reality Editorial Team, microfills were the clear choice for abfraction lesions. The purpose of this study was to evaluate the microleakage of 6 composite resins (2 hybrids, 2 microfills, and 2 flowable composites) with and without load cycling. Notch-shaped Class V cavities were prepared on buccal surface of 180 extracted human upper premolars on cementum margin. The teeth were randomly divided into non-load cycling group (group 1) and load cycling group(group 2) of 90 teeth each. The experimental teeth of each group were randomly divided into 6 subgroups of 15 samples. All preparations were etched, and Single bond was applied. Preparations were restored with the following materials (n=15) : hybrid composite resin [Z250(3M Dental Products Inc. St.Paul, USA), Denfil(Vericom, Ahnyang, Korea)], microfil [Heliomolar RO(Vivadent, Schaan, Liechtenstein), Micronew(Bisco Inc. Schaumburg, IL, USA)], and flowable composite[AeliteFlo(Bisco Inc. Schaumburg, IL, USA), Revolution(Kerr Corp. Orange, CA, USA)]. Teeth of group 2 were subjected to occlusal load (100N for 50,000 cycles) using chewing simulator(MTS 858 Mini Bionix Ⅱ system, MTS Systems Corp., Minn, USA). All samples were coated with nail polish 1mm short of the restoration, placed in 2% methylene blue for 24 hours, and sectioned with a diamond wheel. Enamel and dentin/cementum margins were analyzed for microleakage on a sclale of 0 (no leakage) to 3 (3/3 of wall). Results were statistically analyzed by Kruskal-Wallis One way analysis, Mann-Whitney U-test, and Student-Newmann-Keuls method. (p=0.05) Results: 1. There was significantly less microleage in enamel margins than dentinal margins of all groups. (p<0.05) 2. There was no significant difference between six composite resin in enamel margin of group 1. 3. In dentin margin of group 1, flowable composite had more microleakage than others but not of significant differences. 4. There was no significant difference between six composite resin in enamel margin of group 2. 5. In dentin margin of group 2, the microleakage were R>A=H=M>D>Z. But there was no significant differences. 6. In enamel margins, load cycling did not affect the marginal microleakage in significant degree. 7. In dentin margins, load cycling did affect the marginal microleakage only in Revolution. (p<0.05)

여재 특성에 따른 생물막여과 공법의 처리특성에 관한 연구

강용태,양희천,송근관,권혁원 동아대학교 건설기술연구소 1999 硏究報告 Vol.23 No.2

In the biofilteration process, the removal of turbidity, color, KMnO₄consumpion, NH₄^(+)-N and UV254 reached 98%, 95%, 70%, 85%, 79% respectively. The stable removal efficiency was obtained by the direct filteration after coagulant dosage, though the influent was muddy and highly polluted. The exhausted GAC was used as the media of biofilter, which obtained stable removal efficiency compared with the other medias such as GAC, ZEOCARBON. Effluent of sorptived THMs was not found after 45 days during filter run time. And the case of dual media filteration was prior to single media filteration in the headloss development and quality of effluent. In the case of the ozone dosage rate was determined the color of biofilteration in the AAWTS system. 1㎎/L ozone dosage was proper when the color was below 8 unit.

全南住民에 있어서 惡性腫瘍의 統計的 觀察 (第2報)

曺圭赫,柳柱容,尹康爀,鄭相愚,梁東旭,李珉撤,崔燦 全南大醫大 1983 전남의대학술지 Vol.20 No.4

항진균성 활성물질을 생성하는 토양방선균의 분리

권혁구,강병곤,이장훈 한국환경독성학회 2003 환경독성보건학회지 Vol.18 No.2

Anti-fungal materials producing bacteria were isolated from soil by bennett's agar and actinomycete isolation agar medium. The bacteria were identified as synonym of Actinomycetes. Based on the data obtained from its morphological and colony characteristics. The medium for production of anti-fungal materials was YEME (yeast extract 4g, malt extract 10g, glucose 4g, D.W 1l, pH 7.0±0.2). The culture conditions were 30℃, 7 days and 200 rpm in shaking incubator. No.13, No.15 and No.28 strains were produced anti-fungal materials against fungal plant pathogens. Specially, The No. 28 strain showed a powerful biopesticide activity and broad spectrum effects of anti-fungal materials on Collectrichum coccodes, Botrytis cinerea, Ciadosporium cucumerinum, Didvmella bryoniae,.