퍼지제어기를 이용한 실하중 토크 표준기의 제어

김갑순 경상대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.16 No.-

This study describes the control of the deadweight torque standard machine using a self-tuning fuzzy controller. The torque standard machine should generate the accurate torque for calibrating a torque sensor. In order to reduce the relative expanded uncertainty of the torque standard machine, when a weight was hanged to the end of the torque arm for generating the torque, the sloped torque arm should be accurately controlled to the horizontal level. If the slope of the torque is larger due to the inaccurate control, then the error of the torque becomes larger. This applies the inaccurate torque to a torque sensor to calibrate, and the measuring error of the torque sensor is generated from it. Therefore the torque arm of the torque standard machine is accurately controlled. In this paper, the self-tuning fuzzy controller was designed using a fuzzy theory, and the torque arm of the torque standard machine was accurately controlled. The control gain of the fuzzy controller, that is the membership function size of the error, the membership function size of the error change and the membership function size of the controller were determined from the self-tuning. The control results of the torque standard machine were the overshoot within 0.0076 mm, the rise time within 16.70 s and the steady slate error within 0.0076mm.

SEM 측정법에 의한 초정밀 표면가공 특성연구

강순준,오상록,이갑조,김종관 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

The purpose of this paper is to look at the characteristics of surface finishing which is one of the form accuracies and to obtain the fundamental technical data from the process of machining with diamond tool through experiment and theoretical analysis. The experiments were conducted with domestic made ultra-precision machine and MCD·PCD tool, with aluminum alloyed material and brass being used for the work pieces. The goal of the size accuracy was set to 100nm. The most suitable tool nose radius and machining conditions were selected, and the variations of the surface roughness were observed using SEM method while machining the distance of up to 500km. These data were evaluated and they examined the variation of the machined surfaces while cutting up to 500km of machining distance. At the same time, the state for the wear of diamond tool nose was analyzed and carefully examined through the newest measuring device. Additionally, the characteristics of ultra-precision machining technology were studied through visual analysis.

한국인 집단의 효소의 다형형상에 대한 연구 : 태반과 혈액에서의 MDH, LDH 그리고 GPI에 대하여 MDH, LDH and GPI in Placental and Blood

鄭瑢載,姜順子,金甲英 梨花女子大學校 韓國生活科學硏究院 1990 韓國生活科學硏究院 論叢 Vol.45 No.-

한국인 집단의 태반조직과 혈액 내에서의 Malate dehydrogenase(MDH), Lactate dehydrogenase(LDH) 및 Glucose phosphate isomerase(GPI)에 대한 다형현상을 알아 보고자 horizontal starch gel 전기영동법을 이용하여 조사한 결과는 다음과 같다. 1. MDH 동위 효소는 혈액에서는, 한가지 표현형, HDHs1이 나타났으며, 태반에서는 Soluble-MDH와 Mitochondrial-MDH의 두 form이 모두 나타나는데 태반조직의 MSHs locus에서는 MDHs1 유형만이 나타났고 MDHs locus에서도 보편적 유형인 MDHm1 표현형이 나타났다. 2. LDH 동위 효소는 효현형이 혈액에서 normal LDH isozyme인 LDH1, LDH2, LDH3, isozyme이 나타났고, 태반에서는 LDH1(LDHB4) isozyme 한가지 유형만 나타났다. 3. GPI 동위 효소는 혈액과 태반에서 표현형이 모두 같은 형인 GPI1으로 나타났으며 변이형은 한국인 집단에서 발견되지 않았다. 4. 따라서 한국인 집단의 혈액과 태반에서 MDH, LDH, GPI 효소는 모두 monomorphic한 것으로 나타났으나 LDH의 경우만은 혈액과 태반에서 검출된 isozyme의 종류가 상이하였다. Genetic polymorphisms of three placental and blood cell enzymes malate dehydrogenase(MDH), lactate dehydrogenase(LDH) and glucose phosphate isomerase(GPI) in Korean population was studied by starch gel electrophoresis. The results obtained were as follows : 1. MDH phenotype was found to be only MDH_2 1 in blood cells. Both of MDHs and MDHm were found in the placental. Only MDHs 1 was found at the MDHs I locus. 2. LDH phenotype was found to be the normal LDH isozyme-LDH1, LDH2 and LDH3 isozyme in blood cells. And LDH1(LDHB4) isozyme was found only in the placental extracts. 3. GP I phenotype was found to be only GP I1 in blood cells and the placental extracts, and no variant type was found in Korean population. 4. Based on the above results, MDH, LDH and GPI isozymes are monomorphic in blood cells and placental extracts of Korean population.

한국인 집단의 효소의 다형현상에 대한 연구 : 태반과 혈액에서의 MDH, LDH 그리고 GPI에 대하여 MDH, LDH and GPI in Placental and Blood

鄭瑢載,姜順子,金甲英 이화여자대학교 생명과학연구소 1990 생명과학연구논문집 Vol.1 No.-

한국인 집단의 태반조직과 혈액 내에서의 Malate dehydrogenase(MDH), Lactate dehydrogenase(LDH) alc Glucose phosphate isomerase(GPI)에 대한 다형현상을 알아 보고자 horizontal starchgel 전기영동법을 이용하여 조사한 결과는 다음과 같다. 1. MDH 동위 효소는 혈액에서는 , 한가지 표현형, HDHs1이 나타났으며, 태반에서는 SolubleMDH와 Mitochondial-MDH의 두 form이 모두 나타나는데 태반조직의 MDHs locus에서는 MDHs1 유형만이 나타났고 MDHs locus에서도 보편적 유형인MDHm1 표현형이 나타났다. 2. LDH 동위 효소는 표현형이 혈액에서 normal LDH isozyme인 LDH1, LDH2, LDH3, isozyme이 나타났고, 태반에서는 LDH1(LDHB4) isozyme 한가지 유형만 나타났다. 3. GPI 동위 효소는 혈액과 태반에서 표현형이 모두 같은 형인 GPI1으로 나타났으며 변이형은 한국인 집단에서 발견되지 않았다. 4. 따라서 한국인 집단의 혈액과 태반에서 MDH, LDH, GPI 효소는 모두 monomorphic한 것으로 나타났으나 LDH의 경우만은 혈액과 태반에서 검출된 isozyme의 종류가 상이하였다. Genetic polymorphisms of three placental and blood cell enzymes malate dehydrogenase(MDH),lactate dehydrogenase(LDH) and glucose phosphate isomerase(GPI) in Korean population was studied by starch gel electrophoresis. The results obtained were as follows: 1. MDH phenotype was found to be only MDHs 1 in blood cells. Both of MDHs and MDHm were found in the placental. Only MDHs 1 was found at the MDHs I locus. 2. LDH phenotype was found to be the normal LDH isozyme-LDH1, LDH2 and LDH3 isozyme in blood cells. And DH1(LDHB4) isozyme was found only in the placental extracts. 3. GPI phenotype was found to be only GPI 1 in blood cells and the placental extracts, and no variant type was ound in Korean population. 4. Based on the above results, MDH, LDH and GPI isozymes are monomorphic in blood cells and placental extracts of Korean population.

1999년에 발생한 기상재해 유형별 벼 수량반응조사 연구

주영철,임갑준,한상욱,박중수,조영철,김순재 한국농림기상학회 2000 한국농림기상학회지 Vol.2 No.1

The objectives of this study were to investigate weather conditions which induced discolored grains and viviparous germination, and to evaluate yield responses following viviparous germination during mid- and late- ripening stage, the submergence during reproductive growth stage, and lodging in the yellow ripe stage. Weather conditions which caused glume discoloration at heading stage were 21.3-26.4℃ in average temperature, 75.2-98.4% in relative humidity, 19.3 in transpiration coefficient and 10.8-13.8 m/sec. in wind speed. Yield reduction was 26-27% and 10∼17%, respectively, when the glume discoloration rates were 63.2-65.7% and 38.3-45.2%, obviously due to the decrease in percent of fertile grain and ripening ratio. Weather conditions during continuous rain for 7 days were 96% in relative humidity, 18.9℃ in average temperature, 21.9℃ in maximum temperature, and 16.8℃ in minimum temperature, causing the most viviparous germination in Juanbyeo(45.5%), followed by Jinbubyeo(14.5%), Bongkwangbyeo(14.2%), and Obongbyeo(12.6%). Lateral tillers started to occur when the submergence at the depth of 1.5-2 m lasted one day during the reproductive growth stage. The submergence for 2-3 days at 3-4 m of water depth induced 269-571 lateral tillers/㎡, supporting 32-52% of the total yield. The rice yield in the paddy fields which were left under the lodging conditions until harvesting was not different compared to that of the paddy fields which were kept upright by tieing them together after lodging, but perfect grain ratio decreased about 9.1% in the transplanting culture and 12.5% in the direct seeding culture on dry paddy field because of the increase in immature grains.

Uncertainty Evaluation of a multi-axis Force/Moment Sensor

Gab-Soon Kim 한국정밀공학회 2002 International Journal of Precision Engineering and Vol.3 No.3

Design of a Robot's Hand with Two 3-Axis Force Sensor for Grasping an Unknown Object

Gab-Soon Kim 한국정밀공학회 2003 International Journal of Precision Engineering and Vol.4 No.3

Design and Strain Analysis of Precision 3-component Load Cell

Gab-Soon Kim,Se-Hun Rhee 한국정밀공학회 2000 International Journal of Precision Engineering and Vol.1 No.1

Offline Handwritten Numeral Recognition Using Multiple Features and SVM classifier

Kim, Gab-Soon,Park, Joong-Jo Institute of Korean Electrical and Electronics Eng 2015 전기전자학회논문지 Vol.19 No.4

In this paper, we studied the use of the foreground and background features and SVM classifier to improve the accuracy of offline handwritten numeral recognition. The foreground features are two directional features: directional gradient feature by Kirsch operators and directional stroke feature by local shrinking and expanding operations, and the background feature is concavity feature which is extracted from the convex hull of the numeral, where the concavity feature functions as complement to the directional features. During classification of the numeral, these three features are combined to obtain good discrimination power. The efficiency of our scheme is tested by recognition experiments on the handwritten numeral database CENPARMI, where SVM classifier with RBF kernel is used. The experimental results show the usefulness of our scheme and recognition rate of 99.10% is achieved.

Comparison of facet joint degeneration in firefighters and hospital office workers

Kim, Dong Hyun,An, Yon Soo,Kim, Hyung Doo,Jeong, Kyoung Sook,Ahn, Yeon-Soon,Kim, Kun-Hyung,Kim, Youngki,Song, Han-Soo,Lee, Chul-Gab,Kwon, Young-Jun,Yoon, Jin-Ha Springer Nature 2017 Annals of occupational and environmental medicine Vol.29 No.1

<P><B>Background</B></P><P>There are few published studies on the relationship between occupational lumbar load and facet joint degeneration (FJD). This cross-sectional study was conducted to evaluate the effect of physical lumbar load on FJD by comparing magnetic resonance imaging (MRI) findings of firefighters (FFs) and hospital office workers (HOWs).</P><P><B>Methods</B></P><P>We randomly sampled 341 male FFs and 80 male HOWs by age stratification. A questionnaire and clinical examination, including MRI of the lumbar spine (T12-S1), were conducted. FJD was diagnosed and graded by using the classification of Pathria et al., and reclassified into two groups as follows: no FJD (grade 0) and FJD (grades 1, 2, and 3). The prevalence of FJD was analyzed according to occupational group.</P><P><B>Results</B></P><P>The prevalence of FJD ranged from 31% (L1–L2) to 75% (L4–L5) in the FFs, and from 18% (L1–L2) to 69% (L4–L5) in the HOWs. After adjustment for age, body mass index, and frequency of physical exercise, the adjusted odds ratios (OR) for FJD in the FFs were significantly higher than those in the HOWs at all lumbar spinal levels, except for L3–L4 (L1–L2: OR, 2.644; 95% confidence interval [CI], 1.317–5.310; L2–L3: OR, 2.285; 95% CI, 1.304–4.006; L4–L5: OR, 1.918; 95% CI, 1.037–3.544; L5–S1: OR, 1.811; 95% CI, 1.031–3.181).</P><P><B>Conclusion</B></P><P>This study shows that FFs exhibit a greater likelihood of having FJD than HOWs after controlling for other risk factors of FJD. This suggests that the physical occupational demands of FFs affect their risk of developing FJD.</P>