FDM에서 경사면의 표면과 면적오차법의 관계에 대한 연구

전재억,정진서,황영모,김수광,김준안,계중읍,하만경 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-

In any rapid prototyping process, the layer by layer building process introduces an area error between the staircase and the surface line specified by the computer-aided design model. This affects the dimensional accuracy as well as the surface finish for different part build orientations. This paper describes a methodology for computing the area error for any orientation of the part built by the fused deposition modelling system. This technique can be applied to determine the best build orientation of the part, based on the minimum area error. This technique is verified by comparing the results with the experimental measurements of the area error of the parts built at different orientations.

Cyclophosphamide로 유도된 백서의 방광염에서 염증전구물질 MIF의 발현

김준모 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

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K3에 축적된 내부 응력이 피로 파절에 미치는 영향

김준영,김진우,조경모,박세희 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2

Objectives: This study aimed to evaluate the relationship between the cyclic fatigue of a K3 file and internal stress intentionally induced until the activation of the auto-stop function of the torque-controlled motor. Materials and Methods: K3 (Sybron Endo) .04 and .06 taper, size 25, 30, 35, 40 and 45 were used in this study. To give the internal stress, the K3 files were put into the .02 taper Endo-Training-Bloc (Dentsply Maillefer until the activation of the auto-stop function of the torque-controlled motor. The rotation speed was 300 rpm and torque value was 1.0 N·cm. K3 were grouped by the number of induced internal stress and randomly distributed to 4 experimental groups (n = 10, Stress 0 [control], Stress 1, Stress 2 and Stress 3). For measuring the cyclic fatigue failure, the K3 files were worked against a sloped glass block and time for file separation was recorded. Data was statistically analyzed Statistical analyses were performed using two-way ANOVA and Duncan post-hoc test at p < 0.05 level. Results: Except .04 taper size 30 in Stress 1 group, there were statistically significant differences in time for file separation between control and all experimental groups. K3 with .04 taper showed higher cyclic fatigue resistance than those of .06 taper. Conclusion: In the limitation of this study, the cyclic fatigue of the K3 file was influenced by the accumulated internal stress from use until the auto-stop function was activated by the torque-controlled motor. Therefore, clinicians should avoid the reuse of the K3 file that has undergone auto-stops. (Restor Dent Endod 2012;37(2):74-78)

혈청 전립선특이항원 2.5-20ng/ml인 환자에서 전립선암 발견의 예측인자

김준모 순천향대학교 의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

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溫膽湯 煎湯液이 心臟機能에 미치는 影響

任俊模,文炳淳,金世吉 圓光大學校 韓醫學硏究所 1993 원광한의학 Vol.3 No.1

The present experiment was designed to investigate the effects of Ondamtang(溫膽蕩) on the heart function. And thus the blood preassure and heart rate were measured after injecting the drug and bile. In order to understand the action mechanism of the Ondamtang on the cardiac muscle cell, Mg^2+ -Ca^2+ -ATPase activity and Na^+ -K^+ -ATPase activity at the presence of the drug were also measured. The results were obtained as follows : 1. Ondamtang decreased the blood pressure in the anesthetic rabbits. 2. It seems that Ondamtang doesn't stimulate the antonomic nerves for decreasing the blood pressure and heart rate. 3. Ondamtang activated the Mg^2+ -Ca^2+ -ATPase activity of cardiac sarcoplasmic reticulum, therefore Ca2+ ions of sarcoplasm reticulum were concentrated into the membrane system. 4. Ondamtang inhibited the Na^+ -K^+ -ATPase activity of brain cortex nerve cell. 5. Bile injection decreased the blood pressure and heart rate. According to the above results, Ondamtang inhibits the cardiac muscle contraction and nerve conduction, on the other hand the drug changes the bile content and thus decreases the blood pressure.

기성시가지 도시설계 지구에서의 대지의 물리적 조건이 개발행위에 미친 영향분석

姜俊模 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

The increasing interest for the quality of urban environment brought out the introduction of Urban Design in 1980's and Detailed District Planning in 1990's. But these plans need the development activity of private sector to achieve the goal. So the purpose of this study is to analyze the effect to development activity regarding lots characteristic and result of this study is to actualize urban desing plan. For the analysis, this study chooses Shin-chon Urban design district as the site which has a various lots characteristic and logit model is performed conditioning lots, accessibility, and building as independent variable and the result of building activity, building type and development activity as the dependent variable. As the result of analysis, the primary factors effecting the private building activity are width of sided road, construction year, floor area ratio, building structure. The primary factors effecting the private building type are lors form, number of sided road, building structure. The primary factors effecting the primary development activity are lots area, construction year, floor area ratio, building use. Supposing prerequisition of Private development to actualize Urban design plan, this study has the significance to present the methodology for forecasting the development activity and to propose alternative regarding development potential.

마찰기인 진동의 실험적 연구

김준모,최연선 成均館大學校 科學技術硏究所 1999 論文集 Vol.50 No.1

The dynamic characteristics of friction-induced vibration are investigated. The value of friction coefficient depends on material, relative velocity, and normal force. As a result, the governing equation of a mechanical system including friction effect is inherently nonlinear. In this research, friction-induced vibration characteristics of automotive brake lining pad are investigated by experiments and numerical simulation. The measured responses of pin-on-disk type apparatus which was designed and made for this research show limit cycles of quasi-harmonic vibrations and beating phenomena with the variation of the operation speed and the normal force of the system. Friction coefficient curve which depends on relative velocity was obtained by using Lienard method. Numerical integration was also performed by using the fitted friction coefficient curves. The numerical results of calculated amplitudes and mean displacements show good agreements with those of experiments. Throughout this research, most of the experimentally observed phenomena in friction-induced vibration were successfully explained theoretically and numerically.

접촉연소검지방식을 이용한 후막형 메탄가스센서의 제조 및 그 특성

박준식,이재석,홍성제,박효덕,신상모 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1

본 연구에서는 스크린 프린팅 기술을 이용한 병렬저항열원을 갖는 후막형 가연성 가스센서를 제조하고, 메탄가스에 대한 감도특성을 조사하였다 알루미나 기판의 양면 위에 제조된 병렬형 백금 후막발열체는 후막형 백금 저항체로 사용된 백금페이스트 온도 감지 특성과 표면 특성을 조사하여 paste A로 선정하였다. 제조된 백금 후막 발열체는 평균저항값이 1.8Ω이고, TCR값은 3685ppm/℃이었다. 제조된 백금 발열체상에 Pt과 Pd이 첨가된 촉매 페이스트를 제조하고 가지부는 Pt과 Pd가 첨가된 촉매를 스크린 프린팅하여 후막을 형성하고 열처리하여 제조하였다. 제조된 후막형 센서는 메탄가스에 대해 4.3mV/1009ppm의 감도를 보였으며, 소비전력은 2.12W이었다. We fabricated the sensors with parallel Pt heaters using screen printing process and investigated sensitivities to hydrocarbon gases. The paste A was selected as Pt paste for heater by investigated the properties of TCRs and thick film microstructures. The average resistance of parallel Pt heaters was 1.8Ω, and the best TCR obtained was 3685ppm/℃. On the top of the Pt heaters, a sensing layer added with Pt and Pd as catalyst paste was screen printed and heat treated. The sensitivity of fabricated the sensor was 4.3mV/1000ppm to methane. The power consumption of the sensors was 2.12watts

경험적 분류 모델을 이용한 객체지향 데이터베이스 시스템의 설계

김준모 기전여자대학 1999 論文集 Vol.19 No.-

경험적 분류 모델을 이용한 새로운 객체 지향의 데이터 모델을 제시한다. 이와 같은 모델 설정을 위해 경험 추론 클래스를 도입하였으며, 이 클래스들을 연산하기 위한 경험 추론 연산 클래스를 설계하였다. 또한, 확장된 객체 지향의 데이터 모델하에서 정보의 검색과 변경을 위한 질의어 형식을 제시하였고, 이를 처리하기 위한 모듈을 설계 하였다.

관계성을 이용한 효율적인 객체 지향 데이타 모델의 설계와 구현

김준모 기전여자대학 1992 論文集 Vol.12 No.-

본 논문에서는 기존의 객체 지향 데이타 모델에서의 관계성을 확장한 새로운 객체 지향의 데이타 모델을 제시한다. 이와 같은 모델 설정을 위해 관계성 클래스를 도입하였으며, 이 클래스들을 연산하기 위한 관계성 연산 클래스를 설계하였다. 또한, 확장된 객체 지향 데이타 모델하에서 정보의 검색과 변경을 위한 질의어 형식을 제시하였고 이를 처리하기 위한 모듈을 설계하고 구현하였다.