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최종우 전력전자학회 2004 전력전자학회지 Vol.9 No.4
전동기는 전기 에너지를 이용하여 회전축에서 기계적 회전력(토크)을 얻는 장치이다. 많은 응용분야에서 평균 토크를 제어하는 것만으로도 충분한 제어 성능을 얻을 수 있지만 로봇. 수치제어선반 등과 같은 정밀 제어 분야의 경우 전동기의 순시 토크를 제어하여 속도 및 위치를 제어하여야 한다.(중략)
Rennet-induced gels and their mechanical properties
최종우,Choi, Jong-Woo Institute of Agricultural Science 2011 Korean Journal of Agricultural Science Vol.38 No.4
Casein micelles are the basic building block of rennet-induced gels. The stiffness of these gels is increased with reaction time. This is probably due to the continuous participation of activated casein micelles into growing network. Dual binding model of casein micelles, which explains assembly of casein and colloidal calcium phosphate, can provides fairly reasonable explanation for the changes in mechanical properties of rennet-induced gels made from different milk pHs and varying colloidal calcium phosphates. The changes in stiffness of these gels would be used for controlling textural properties of cheeses.
3D 프린팅으로 제작된 AlCrFeNi 고엔트로피 합금의 분말 입도에 따른 특성 분석
최종우,박혜진,강결찬,정민섭,오기태,홍성환,김현길,김기범 한국분말재료학회 2022 한국분말재료학회지 (KPMI) Vol.29 No.1
Conventionally, metal materials are produced by subtractive manufacturing followed by melting. However, there has been an increasing interest in additive manufacturing, especially metal 3D printing technology, which is relatively inexpensive because of the absence of complicated processing steps. In this study, we focus on the effect of varying powder size on the synthesis quality, and suggest optimum process conditions for the preparation of AlCrFeNi high-entropy alloy powder. The SEM image of the as-fabricated specimens show countless, fine, as-synthesized powders. Furthermore, we have examined the phase and microstructure before and after 3D printing, and found that there are no noticeable changes in the phase or microstructure. However, it was determined that the larger the powder size, the better the Vickers hardness of the material. This study sheds light on the optimization of process conditions in the metal 3D printing field.
치주질환 심도에 따른 치아동요도와 교합력의 상관관계에 관한 연구
최종우,이만섭,권영혁,Choi, Joug-Woo,Lee, Man-Sup,Kwon, Young-Hyuk 대한치주과학회 1993 Journal of Periodontal & Implant Science Vol.23 No.2
The purpose of this study was to investigate the change of tooth mobility and bite force according to periodontal disease severity. Tooth mobility and biting force due to change of viscoelastic property of periodontium were influenced by inflammation of periodontal tissue. 30 patients participated in this study, the periodontal disease severity is evaluated with SBI and attachment loss. SBI and attachment loss were examined by periodontal probe. Tooth mobility was tested two times to each tooth using periotest (Siemens Co, Germany) and bite force was evaluated with MPM-3000 (Nihon Kohden Co, Japan). Statistical analysis was applied to correlation ($r^2$) and regression analysis. The obtained results were as follows : 1. As the attachment loss increased, tooth mobility increased with significance, and they had highly positive correlation ($r^2=0.68$) on entire dentition. 2. As the SBI increased, tooth mobility increased with significance, and they had positive correlation ($r^2=0.37$) on entire dentition. 3. As the attachment loss increased, bite force decreased with significance, and they had highly negative correlation ($r^2=0.42$) on maxillary anterior dentition but low negative correlation ($r^2=0.20$) on the other portion of dentition. 4. As the SBI increased, bite force decreased with significance, and they had highly negative correlation ($r^2=0.31$) on maxillary anterior dentition but low negative correlation ($r^2=0.16$) on the other portion of dentition. 5. As tooth mobility increased, bite force decreased with significance, and they had highly negative correlation ($r^2=0.32$) on maxillary anterior dentition but low negative correlation ($r^2=0.16$) on the other portion of dentition.
최종우,장성준,방준학,이해룡,김진서,Choi, J.W.,Chang, S.J.,Bang, J.H.,Lee, H.R.,Kim, J.S. 한국전자통신연구원 2019 전자통신동향분석 Vol.34 No.4
The olfactory bio technology is largely based on its corresponding recognition technology and smell stimulus that acquires, analyzes, and processes volatile organic compounds present in chemical molecules, which are present in the breath or air evoked by an electronic nose artificially imitating the human biological nose. The olfactory bio technology is also based on a scent display technology that automatically diverges various digital flavors based on aesthetics, concentration, duration, and intensity information required to enhance the sensibility using a computer. Recently, attempts have been made to apply noninvasive screening of dementia by sensing, analyzing, encoding, and transmitting bio information obtained through an olfactory interface, both domestically and externally; further, the olfactory medical content technology has been applied to delay or reduce the onset of dementia. In this study, we will focus on early screening of dementia using olfactory biology information and dementia cognitive enhancer content that delays or reduces the onset of dementia.
崔鍾宇,朴涇錫 慶熙大學校 1985 論文集 Vol.14 No.-
This study has been made to observe the effect of vaporization of injected fuel under the several important factors on the carburetor for gasoline engine. To measure the vaporization rate of mixture in the carburetor, the key point of consideration for divising the cyclone which is devised to be able to separated injected fuel with drop diameter 10-30㎛. By using a transparent tube type model of the carburetor, like one of conventional gasoline engines, this experiment has been performed. Results of the study are summarized as follow. 1. In the conditions of this study, Ve=12.6 - 50.4㎧, θ=30 - 90, t = 25.℃ - 50℃, the vaporization rate is 10-50% 2. The vaporization rate increase in proportion to decreasing of throttle valve angle, to rising air temperature and growing air - fuel ratio. 3. When air velocity is increased, the injected fuel flows with thin thickness of liquid film on the inner wall of intake pipe. As air temperature is increased, it flows with more thin.
3차원 관절 전기측각기를 이용한 정상성인의 보행분석결과
최종우,김세주,서관식,고성범,윤준식 대한임상신경생리학회 2003 Annals of Clinical Neurophysiology Vol.5 No.2
Background: The aim of this study is to present the basic reference data of kinematic gait analysis of normal Korean adults with 3 dimensional electrogoniometer, DomotionⓇ. Method: The basic kinematic gait parameters of hip, knee and ankle joints on the sagittal plane were obtained from 10 healthy adults with 5 repetition for each. Three-dimensional gait analysis was performed with DomotionⓇ electrogoniometer in 10 meters long flat floor. Each data collected was processed with IBM PC equipped with gait analysis program. R e s u l t s: Mean maximal hip flexion was 23.05°±4 . 6 2°and mean maximal hip extension was 6.46°±1 . 3 0°. Knee flexion was observed with two peak values. The first peak knee flexion was 6.50°±2.07°at 20.4% of gait cycle and the second peak flexion was 50.34°±2.23°at 75.8% of gait cycle. Mean maximum ankle dorsiflexion was 5.57°±1.19°at 44% of gait cycle and mean maximum ankle plantar flexion was 15.51°±1.73°at 68.5% of gait cycle. Conclusion: We concluded three dimensional gait analysis with electrogoniometer DomotionⓇ offers a valid and reliable kinematic data and the application of this tools for clinical gait evaluation will be helpful in management of pathological gait.