• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1143-1147
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• 2008

This test is performed to reduce slip/slide which are generated from VVVF inverter. when the adhesive force between wheel and rail is not ensured, slip/slide are mainly originated. In this paper, we carried out real test adopting acceleration changes to find optimized method minimizing the amount of generation of slip/slide. Through this real test, we obtained optimum result on reducing slip/slide and especially focused on decrease in slip. This method is currently applied to real train.

• 한국생산제조학회지
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• 제20권4호
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• pp.502-508
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• 2011

In this paper, we proposed vertical feeding mechanism for a slide parts feeder using the slide type method. This parts feeder of the slide type method have been proposed to suppress the dust generation from the feeding objects. The proposed parts feeder mechanism is composed with the casing hopper, the vertical feeding unit, the in-line feeder and linear shooter unit. And, these mechanisms did modularity through optimum design by means of mechanical and dynamical analysis using the RecurDyn(multi-body dynamics) analysis module. Also were carried out the virtual prototype using the 3-D CAD program. And it had been manufactured as the prototype of the slide parts feeder. The field test for validation of performance was performed directly at the inspection line of bolt and screw. In the field test, this slide parts feeder showed an efficiency of about 1.2 times the bowl feeder. It also showed an epoch reduction in the dust generation compared to the vibration bowl feeder. So this slide parts feeder will be applied useful in the vision inspection system for a screw and bolt.

• 한국수산과학회지
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• 제1권2호
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• pp.135-137
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• 1968

1938년 A. F. Spillaus에 의하여 Bathythermograph가 고안된 이내 현재까지 수차 개량된 것이 제작판매하게 되어 해양조사 또는 어장탐색에 총중한 측기로 세계 각국에서 널리 보급되었다. 이 측기는 항해중이라도 수심 270m까지 내렸다 올림으로써 수심에 대한 수온이 동시에 연속된 일선으로 도은 또는 Smoked한 유리 판상에 기록되어 신속하게 수온의 미세한 수직분포를 알 수 있어 어장탐사에 필요한 나층의 판별과 그 수탐 및 수온의 판단에 큰 도움을 준다. 여기에서는 1, 2연전 이내 수산진흥원 산하 각 해구 시험소 및 교육기관을 비롯한 해양조사 관계기관에 다수양이 공급되어 널리 사용되고 있는 B.T의 Smoked-glass slide가 없어 사용의 곤란성 및 일본 또는 미국으로부터의 수입의 귀찮은 수속을 해소시키기 위하여 본원에서 실험 제작사용한 결과로서 간단하게 B.T Smoked glass Slide를 제작할 수 있는 방법을 소개하고자 한다.

• 한국정밀공학회지
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• 제23권6호
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• pp.128-135
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• 2006

Rational dynamic modeling and analysis method f3r complex structures are studied with special attention to slide way joints. For modeling of slide way joints, a general modeling technique is used by using the influence coefficients method which is applied to the conversion of detailed finite element model to the equivalent reduced joint model. The theoretical part of this method is illustrated and the method is applied to the structure with slide way joint. In this method, the non-linearity of the contact surfaces is considered within a proper range and the boundary effect of the joint model could be eliminated. The proposed method was applied to finite element modal analysis of a clamp jointed cantilever beam and slide way joints of the vertical type lathe. The method can also be used to other kinds of joint modeling. The results of these analysis were compared with those of Yoshimura models and rigid joint models, which demonstrated the practical applicability of the proposed method.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.156-161
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• 2003

It is an interest problem to predict substance distributions in three-dimensional space. Recently, a research field as Geostatistics is advanced. It is a kind of inter- or extrapolation mathematically. Some useful means for the inter- and extrapolation are known, in which slide window method with neural networks is hopeful one. We propose multi-dimensional extrapolation using multi-layer neural networks and the slide-window method. The multi-dimensional extrapolation is not similar to one-dimension. It has plural algorithms. We researched line predictors and local-plain predictors I two-dimensional space. The both predictors are equivalent; however, in multi-dimensional extrapolation, it is very important to find the direction of predictions. Especially, since the slide window method requires information to predict the future in sampling data, if they are not ordered appropriately in the direction, the predictor cannot operate. We tested the extrapolation for typical two-dimensional functions, and found an excellent character of slide-window method based on local-plain. By using the method, we can extrapolate the function until twice-outer regions of the definitions.

• 한국식품위생안전성학회지
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• 제22권3호
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• pp.137-144
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• 2007

우리나라의 전통발효식품의 기초가 되는 곡자는 날곡류에 Aspergillus속, Rhizpous속 등 곰팡이류 , 효모 기타 미생물이 자연적으로 번식하여 효소를 함유하는 것이고, 입국은 곡류를 증자한 후 Aspergillus속, Rhizopus,속 등 곰팡이를 번식시켜 효소를 함유하는 것이다. 식품첨가물공전 천연첨가물 중 국(입국) 시험항목에서 잡균(Penicillium속)의 오염확인이 어려워 새로운 곰팡이 시험법의 확립이 필요하다. 그래서 곰팡이 특유의 포자, 분생자병 또는 균사의 격벽유무 등의 관찰이 용이한 slide culture법을 확립하였다. Slide culture 법은 slide glass위에 정방형의 잘라진 배지를 놓고, 양쪽 모서리에 포자를 접종하고 배양되는 과정동안 포자, 균사체 및 격벽 등을 관찰하였다. Slide culture법을 이용하여 대표적인 식품 관련 곰팡이의 형태학적 특징을 확인하여, 시중에서 유통되는 수입 또는 국내 생산되는 곡자, 입국 등을 수거하여 Penicillium속 오염 여부를 모니터링하였으며, 그 결과 Penicillium속의 오염율은 0%였음을 확인하였다. 최종적으로 식품첨가물공전의 국 중 잡균시험법 등 곰팡이시험법 제 개정의 기초자료로 활용하고자 한다.

• 한국광학회:학술대회논문집
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• 한국광학회 1990년도 제5회 파동 및 레이저 학술발표회 5th Conference on Waves and lasers 논문집 - 한국광학회
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• pp.82-86
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• 1990

A camera type optical bench system equipped with a lens collimator and an image analyzer is fabricated to measure the equivalent focal length and distortion of lenses. This system is automatized by the computer which controls stepping motors. A nodal slide optical bench system equipped with an off axis reflective collimator is fabricated and improved by using rotating arms and air bearing system. distortion measurement on a wide angle lens using the camera method and the nodal slide method is reported. Defocusing error in the distortion measurement with the nodal slide optical bench is analyzed and improved by iteration method to search the correct image point.

• KIEAE Journal
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• 제7권2호
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• pp.31-37
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• 2007

Despite of many supportive research to the usefulness of slide evaluation on environment of outdoor lighting, study method of using slides have provoked many discussions of its manifestation of reality of field conditions. This study aims to compare the results of slide survey with that of field survey. Distant view and short range view of nightscape of Seoul were selected. Field measurement of luminance and chromaticity were conducted and questionnaire survey were conducted. Frequency analysis, T-test, factor analysis were conducted. Results shows that distant view and short range view of field survey have better visual atmosphere than slide survey. In addition, slide survey on distant view shows lowest values. Difference between field survey and slide survey on distant view is much bigger than the results of short range view.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.814-819
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• 2003

Machine tool design concepts have evolved towards high efficiency, accurate precision. high structural integrity, and multi-functional systems. Like many other structures, machine tools are also composed of many parts. When these parts are assembled, many kinds of joints are used. In the finite element analysis of these assembled structures, most joints are commonly considered as rigid joints. But, to get the more accurate solution, we need to model these joints in a appropriate manner. In this study, rational dynamic modeling and analysis method for complex structures are studied with special attention to slide way joints. For modeling of slide way joints, a general modeling technique is used by influence coefficients method which is applied to the conversion of detailed finite element model to the equivalent reduced joint model. The theoretical part of this method is illustrated and the method is applied to the structure with slide way joint. In this method. the non-linearity of the contact surfaces is considered within a proper range and the boundary effect of the joint model can be eliminated. The proposed method was applied to finite element modal analysis of a clamp jointed cantilever beam and slide way joints of the vertical type lathe. The method can also be used to other kinds of joint modeling. The results of these analysis were compared with those of Yoshimura models and rigid joint models. which demonstrated the practical applicability of the proposed method.

• 농약과학회지
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• 제7권4호
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• pp.296-301
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• 2003

최근 경제작물 재배를 위해 시설재배 면적이 증가되고 있으며, 해충방제를 위해 사용된 농약의 부작용 문제로 인하여 농약과 천적의 조화로운 사용을 강조하는 해충의 종합적 방제 기술이 필요하게 되었다. 따라서 시설재배지에서 많은 피해를 주고 있는 점박이응애 및 총채벌레의 천적인 Amblyseius cucumeris와 Amblyseius fallacis에 대해 저독성약제를 선발하기 위해 2가지 생물검정기술 (slide dipping method, potter spray tower method)을 이용하였다. Potter spray tower method로 살포된 약제는 살충작용과 기피효과를 보였으며, 기피효과를 보이는 살충제는 slide dipping method 에 의해 살충율을 효과적으로 평가 할 수 있었다. 1994년에 선발 개발된 permethrin 저항성계통 A. fallacis 상품의 저항성 안정성을 평가한 결과 1999년 현재 같은 피레스로이드계통인 deltamethrin에 대한 저항성 감소는 보이지 않았으며, permethrin 저항성계통에 대해 imidacloprid, fipronil, chlorfenapyr, abamectin, spinosad 등의 약제가 비교차저항성을 보였다.