• Title, Summary, Keyword: processing condition

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A Study on Geotechnical Lineament Analysis by Image Processing Method (영상사진을 이용한 지반공학적인 선구조분석 연구)

  • 이수곤;금동헌
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.593-600
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    • 2000
  • Most of ground investigations can be grasped geological distribution which like rock name, geological structure, soil condition, underwater condition, land slide, ground cave-in, ground collapse by geological survey. But geological survey is limited to part region geological structure, not wide region. Therefore, Image Processing Method must need to grasp wide region geological structure. The object of this research is presented analysis data of geotechnical engineering in first step investigation.

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Analysis of Wear Debris for Machine Condition Diagnosis of the Lubricated Moving Surface (기계윤활 운동면의 작동상태 진단을 위한 마멸분 해석)

  • Seo, Yeong-Baek;Park, Heung-Sik;Jeon, Tae-Ok
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.21 no.5
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    • pp.835-841
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    • 1997
  • Microscopic examination of the morphology of wear debris is an accepted method for machine condition and fault diagnosis. However wear particle analysis has not been widely accepted in industry because it is dependent on expert interpretation of particle morphology and subjective assessment criteria. This paper was undertaken to analyze the morphology of wear debris for machine condition diagnosis of the lubricated moving surfaces by image processing and analysis. The lubricating wear test was performed under different sliding conditions using a wear test device made in our laboratory and wear testing specimen of the pin-on-disk-type was rubbed in paraffine series base oil. In order to describe characteristics of debris of various shape and size, four shape parameters (50% volumetric diameter, aspect, roundness and reflectivity) have been developed and outlined in the paper. A system using such techniques promises to obviate the need for subjective, human interpretation of particle morphology in machine condition monitoring, thus to overcome many of the difficulties in current methods and to facilitate wider use of wear particle analysis in machine condition monitoring.

Effects of processing Factors on Filling Imbalances in Multi-cavity Injection Mold. (다수 캐비티 사출금형에서 성형 인자가 충전 불균형에 미치는 영향)

  • Kang C. M.;Jeong Y. D.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.54-57
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    • 2004
  • Almost all injection molds have multi-cavity runner for mass production, which are designed with geometrically balanced runner system in order to minimize filling imbalance between cavity to cavity during processing. However, even though geometrically balanced runner is used, filling imbalances have sometimes been observed. These filling imbalances have historically been considered as result of uneven mold temperature and mold deflection, but it actually results from non-symmetrically shear, pressure, temperature distribution within melt material as it flows through the runner system. Filling imbalance could be decreased by modifying processing conditions that are related to shear, pressure, temperature such as injection rate, mold temperature, injection pressure, melt temperature. In this study, a series of experiment was conducted using Taguchi method to determine which processing condition influence as the primary cause of filling imbalance in geometrically balanced runner system. As a result of experiments, this paper could present an optimal processing condition to minimize variable that brings about filling imbalance geometrically balanced runner system

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Optimal Processing Condition of Seafood-like flavoring Sauce by RSM

  • Kim, Hun;Cho, Woo-Jin;Jeong, Eun-Jeong;Lee, Young-Mi;Cha, Yong-Jun
    • Proceedings of the Korean Society of Fisheries Technology Conference
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    • pp.85-86
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    • 2003
  • As seafood processing by-products, enormous seafood processing waste waters (SPWWs) are produced at most seafood processing plants, but management of these waste waters are becoming great burden at small capacity processing plant. Hence, almost of them have been discarded without suitable application methods. And these SPWWS might causes of marine environmental pollution and waste in potential food resources. (omitted)

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The Effect of Processing Condition on Physicochemical Characteristics in Pine Nut Gruel (잣죽의 제조조건이 이화학적 특성에 미치는 영향)

  • Zhang, Xian;Lee, Fan-Zhu;Kum, Jun-Seok;Eun, Jong-Bang
    • Korean Journal of Food Science and Technology
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    • v.34 no.2
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    • pp.225-231
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    • 2002
  • The physicochemical characteristics of pine nuts gruel were investigated to find the effects of processing condition during the processing. Three-dimensional response surface methodology was applied to investigate effects of ratio of water volume and pine nuts weight to rice weight and heating time on dependent variables of the physicochemical characteristics. The dependent variables in physicochemical characteristics were viscosity (cP), spreadability (cm), pH, soluble solid content (%), color, total sugar (%) and amylose content (%). The F-value of ratio of water volume and pine nuts weight to rice weight and heating time to viscosity were 8.91, 4.54 and 5.02 respectively and they are significantly different at 5% level. The F-value to spreadability were 5.44, 7.88 and 8.04 respectively and they are significantly different at 5% level. These results suggest that water volume, pine nuts weight and heating time greatly affect the viscosity and spreadability of pine nuts gruel. The processing condition also affect the soluble solid content. The changes of the processing condition did not affect the pH of pine nuts gruel. We found that the L, a, b value were affected more by ratio of water volume and pine nuts weight to rice weight than by heating time. The water volume affected more the total sugar and amylose content of pine nuts gruel than pine nuts weight and heating time.

Extraction Condition of Beverage Base for the Processing of Hydrangea serrata Seringe (수국차(Hydrangea serrata Seringe)의 액상 가공을 위한 추출조건 설정)

  • 김인호;정낙희;한대석;이창호;오세욱
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.32 no.7
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    • pp.1168-1171
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    • 2003
  • Water extraction of Suguk (Hydrangea serrata Seringe) was conducted for optimum condition of beverage processing on the boil or dip in water. Extraction samples for sensory evaluation (color, flavor, sweetness, bitterness, astringency) of the plant were boiled in water ranging 0.1%∼0.4% (w/v) or dipped in water ranging 0.2%∼1.0% (w/v) during 2 min. Samples boiled in water were evaluated low sensory quality with strong bitter and astringent taste. Samples dipped in water showed higher value than that boiled in water on the sensory evaluation. Sample 0.5% (w/v) dipped in water at 10$0^{\circ}C$ during 2 min. was decided as an optimum condition for beverage processing of the plant.

Optimization of Etching Profile in Deep-Reactive-Ion Etching for MEMS Processes of Sensors

  • Yang, Chung Mo;Kim, Hee Yeoun;Park, Jae Hong
    • Journal of Sensor Science and Technology
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    • v.24 no.1
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    • pp.10-14
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    • 2015
  • This paper reports the results of a study on the optimization of the etching profile, which is an important factor in deep-reactive-ion etching (DRIE), i.e., dry etching. Dry etching is the key processing step necessary for the development of the Internet of Things (IoT) and various microelectromechanical sensors (MEMS). Large-area etching (open area > 20%) under a high-frequency (HF) condition with nonoptimized processing parameters results in damage to the etched sidewall. Therefore, in this study, optimization was performed under a low-frequency (LF) condition. The HF method, which is typically used for through-silicon via (TSV) technology, applies a high etch rate and cannot be easily adapted to processes sensitive to sidewall damage. The optimal etching profile was determined by controlling various parameters for the DRIE of a large Si wafer area (open area > 20%). The optimal processing condition was derived after establishing the correlations of etch rate, uniformity, and sidewall damage on a 6-in Si wafer to the parameters of coil power, run pressure, platen power for passivation etching, and $SF_6$ gas flow rate. The processing-parameter-dependent results of the experiments performed for optimization of the etching profile in terms of etch rate, uniformity, and sidewall damage in the case of large Si area etching can be summarized as follows. When LF is applied, the platen power, coil power, and $SF_6$ should be low, whereas the run pressure has little effect on the etching performance. Under the optimal LF condition of 380 Hz, the platen power, coil power, and $SF_6$ were set at 115W, 3500W, and 700 sccm, respectively. In addition, the aforementioned standard recipe was applied as follows: run pressure of 4 Pa, $C_4F_8$ content of 400 sccm, and a gas exchange interval of $SF_6/C_4F_8=2s/3s$.

Synthesis and analysis CdSe Quantum dot with a Microfluidic Reactor Using a Combinatorial Synthesis System (조합 합성 시스템의 미세유체반응기를 이용한 CdSe 양자점 합성 및 분석)

  • Hong, Myung Hwan;Lee, Duk-Hee;Kang, Lee-Seung;Lee, Chan Gi;Kim, Bum-Sung;Kim, Nam-Hoon
    • Journal of Korean Powder Metallurgy Institute
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    • v.23 no.2
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    • pp.143-148
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    • 2016
  • A microfluidic reactor with computer-controlled programmable isocratic pumps and online detectors is employed as a combinatorial synthesis system to synthesize and analyze materials for fabricating CdSe quantum dots for various applications. Four reaction condition parameters, namely, the reaction temperature, reaction time, Cd/Se compositional ratio, and precursor concentration, are combined in synthesis condition sets, and the size of the synthesized CdSe quantum dots is determined for each condition. The average time corresponding to each reaction condition for obtaining the ultraviolet-visible absorbance and photoluminescence spectra is approximately 10 min. Using the data from the combinatorial synthesis system, the effects of the reaction conditions on the synthesized CdSe quantum dots are determined. Further, the data is used to determine the relationships between the reaction conditions and the CdSe particle size. This method should aid in determining and selecting the optimal conditions for synthesizing nanoparticles for diverse applications.

Decision of Friction Condition for Materials of Automobile Transmission by Theory of Intelligence (지능이론을 이용한 자동차 트랜스미션 소재의 마찰조건 판정)

  • Cho Yonsang;Kim Younghee;Park Heungsik
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • pp.312-315
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    • 2004
  • A lubricated state of an automobile transmission can not be inspected directly with eyes. Thus, it needs to develop a more general method. Wear debris can be collected from the lubricants of operating transmission of an automobile and its morphology is directly related to the fiction condition of the interacting materials from which the wear particles originated in lubricated transmission. In this paper, to identify the friction condition for transmission gear by neural network, the wear test of ball-on-disk type and the analysis of friction state were carried out for carburized SCM420 and nitrocarburized NT100 under different experimental conditions. The four shape parameters($50\%$ volumetric diameter, aspect, roundness and reflectivity) of wear debris were calculated by the image processing system. They were used as input values to identify the moving condition of transmission gear by the neural network.

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