6포트 수신기용 전력 검출기 설계

이경준(Kyeong-Jun Lee),이문규(Moon-Que Lee) 대한전기학회 2019 대한전기학회 학술대회 논문집 Vol.2019 No.7

회전 분리수거를 위한 장치에 대한 연구

이경준(Kyeong-Jun Lee),박민호(Min-Ho Park),이시형(Si-Hyung Lee),김정한(Jeong-Han Lee),이진경(Jin-Kyung Lee) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.7

이진화된 컨볼루션 신경망에 최적화된 시스톨릭 어레이 구조와 신경망 공동 최적화

이경준(Kyeong-Jun Lee),김재영(Jae-Yeong Kim),심재윤(Jae-Yoon Sim) 대한전자공학회 2022 대한전자공학회 학술대회 Vol.2022 No.6

산업용 로봇의 힘측정 시스템을 위한 힘측정 및 통신장치 개발

이경준(Kyeong-Jun Lee),김갑순(Gab-Soon Kim) 제어로봇시스템학회 2016 제어·로봇·시스템학회 논문지 Vol.22 No.2

This paper describes the design of a force measurement and communication system for the force measuring system in industrial robots. The force measurement and communication system is composed of a multi-axis force sensor and a controller for measuring the forces (x-direction force, y-direction force and z-direction force) and sending the measured forces to the robot’s controller (PLC: Programmable Logic Controller). In this paper, the force measurement and communication system was designed and fabricated by using a DSP (Digital Signal Processor). An environment test and a grinding and deburring test using an industrial robot with the force measurement and communication system with three-axis force sensor were carried out to characterize the system. The tests showed that the system could safely measure the forces from the three-axis force sensor and send the measured forces to the industrial robot’s controller while the grinding and deburring test was performed. Thus, it is thought that the fabricated force measurement and communication system could be used for controlling the force for an industrial robot’s grinding and deburring.

정규압밀 해성점토의 강도증가율

이경준(Lee Kyeong-Jun),임종철(Im Jong-Chul) 대한토목학회 2007 대한토목학회논문집 C Vol.27 No.4

부산 신항, 평택항 그리고 목포 간척지 인근 해안지역에 분포하는 액성한계 약 30~110% 범위의 해성 퇴적 점토를 이용하여 표준압밀시험으로 평가한 선행압밀압력의 약 1.5, 2.5 또는 4.0배의 압밀압력으로 삼축 셀에서 등방 및 Ko 압밀 이후 축입축 시험을 수행하였다. 시험결과에서 최대 주응력비에 대응하는 비배수 전단강도를 이용하여 정규압밀점토의 비배수 전단강도와 등방압밀압력(등방압밀시료) 또는 유효 연직압력(Ko 압밀시료)의 관계를 나타내었으며 그 결과와 기존의 경험식 및 주요 연구 결과와 비교하였다, 소성지수 40 이상의 점토 퇴적층의 정규압밀 상태의 강도증가율은 (S<SUB>u</SUB>/σ<SUB>vo</SUB>')<SUB>I</SUB>,≒0.22~0.23(평균 0.225) 및 (S<SUB>u</SUB>/σ<SUB>vo</SUB>')<SUB>Ko</SUB>≒0.20~0.21(평균 0.205)로 거의 일정하며 (S<SUB>u</SUB>/σ<SUB>vo</SUB>')<SUB>I</SUB>/(S<SUB>u</SUB>/σ<SUB>vo</SUB>')<SUB>Ko</SUB>≒1.1이다. 반면, 소성지수 40 이하(또는 액성한계 60% 이하)의 점토 퇴적층의 정규압밀 상태의 강도증가율은 일정한 관계를 정의하기 어려우나 액성한계 또는 소성지수의 값이 작을수록 증가하는 경향을 나타낸다. Triaxial compression tests were conducted on normally consolidated samples in isotropic and Ko anisotropic states. The tests were conducted on marine clay deposits, which were collected from the seashore regions of the Susan new Port, Pyeng-Tack Port and Moe-Po reclaimed land. Consolidation pressures were applied on the order of about 1.5, 2.5 or 4.0 times preconsolidation pressure estimated in oedometer tests to make samples be normally consolidated in triaxial cell before shearing them. As the results of triaxial compression tests, the relations between the undrained shear strength at a maximum stress ratio and the normal consolidation pressure (Isotropic or Ko anisotropic states) are almost constant in the marine clay with the plasticity index more than 40, which are (S<SUB>u</SUB>/σ<SUB>vo</SUB>)<SUB>I</SUB> ≒ 0.22~0.23 and (S<SUB>u</SUB>/σ<SUB>vo</SUB>)<SUB>Ko</SUB> ≒ 0.20~0.21 respectively. And the ratio of (S<SUB>u</SUB>/σ<SUB>vo</SUB>)<SUB>I</SUB> to (S<SUB>u</SUB>/σ<SUB>vo</SUB>)<SUB>Ko</SUB> is about 1.1. However the marine clay with the plasticity index less than 40 (or with the liquid limit less than about 60%) shows the tendency to increase with the decrease of plasticity index (or liquid limit). In addition, these estimated strength increment ratios are compared with existing results.

손가락 힘측정장치의 3축 힘센서 설계

이경준 ( Kyeong Jun Lee ),김갑순 ( Gab Soon Kim ) 한국센서학회 2016 센서학회지 Vol.25 No.2

This paper describes the design and fabrication of a three-axis force sensor with three parallel plate structures(PPSs) for measuring force in a finger force measuring system for a spherical object catch. The three-axis force sensor is composed of a Fx force sensor, Fy force sensor and a Fz force sensor, and the elements of Fx force sensor and Fy force sensor are a parallel plate structure(PPS) respectively and Fz force sensor is two PPS. The three-axis force sensor was designed using FEM(Finite Element Method), and manufactured using strain-gages. The characteristics test of the three-axis force sensor was carried out. As a test results, the interference error of the three-axis force sensor was less than 1.32%, the repeatability error of each sensor was less than 0.04%, and the non-linearity was less than 0.04%.

해성 점토의 압밀응력과 비배수 전단강도에 관한 실험적 연구

이경준(Lee Kyeong Jun),임종철(Im Jong Chul) 대한토목학회 2004 대한토목학회 학술대회 Vol.2004 No.10

발생빈도를 고려한 연관성분석 연구

임제순,이경준,조영석,Lim, Je-Soon,Lee, Kyeong-Jun,Cho, Young-Seuk 한국데이터정보과학회 2010 한국데이터정보과학회지 Vol.21 No.6

데이터마이닝 분야에서 연관성분석은 가장 많이 사용되고 있는 기법으로 데이터 내에 포함되어 있는 특정 항목들의 연관성을 수치화시켜 나타내는 방법이다. 기본적으로 연관성규칙은 지지도, 신뢰도, 향상도를 계산하여 연관성의 유무를 판단한다. 기존에 제시된 관련 논문에서는 관심변수의 발생유무만을 바탕으로 연관성규칙을 이용하였고, 빈번하지 않은 데이터에 대한 문제점과 순위결정함수를 통한 해결방안을 제시하였다. 하지만 실제 데이터에서는 발생이 빈번하지 않은 데이터 뿐 아니라, 발생이 많이 일어나는 데이터도 존재한다. 따라서 발생빈도를 고려한 연관성규칙이 필요하다고 생각한다. 본 논문에서는 각 케이스 내의 발생빈도를 고려한 새로운 연관성 측정 도구를 제시하였다. 또한 실제 예제를 통하여 기존의 연관성규칙과 새로운 연관성규칙의 결과를 비교해 보았다. 그 결과, 새로 제시한 연관성규칙이 기존의 연관성규칙보다 더 세밀하게 구분하는 것을 확인할 수 있었다. In data mining, association rule is a popular and well researched method for discovering interesting relations between variables. There are three measures for association rule, support, confidence and lift. But there are some problem in them. They don't consider the frequency of variable in case. So, we need the new association rule which consider the frequency.In this paper, we proposed the new association rule. We compared the proposed association rule with the original association rule from example data. As a result, we knew our function was better than the original function in terms of sensitivity.

16주 복합운동프로그램을 통한 저체력군 고등학생의 대사증후군 지표와 자율신경계의 변화

한진만,이경준,양정옥,Han, Jin-Man,Lee, Kyeong-Jun,Yang, Jeong-Ok 한국데이터정보과학회 2012 한국데이터정보과학회지 Vol.23 No.4

본 연구의 목적은 PAPS를 실시하여 4, 5급에 해당하는 저체력군 학생을 대상으로 16주 복합운동프로그램을 통해 대사증후군과 자율신경계에 어떠한 변화가 나타나는가를 규명하는 것이다. 16주 복합운동프로그램은 주 5회에 걸쳐 준비운동, 본운동, 정리운동으로 구성하고 1회 50분씩 실시하였다. 자료처리는 SPSS 19.0 통계프로그램을 이용하여 모든 종속변인들의 평균과 표준편차를 산출하였다. 샤피로-윌크 검정값을 이용하여 정규성 검정을 실시하였고, 복합운동집단과 통제집단의 모평균 차이를 위하여 독립표본 t-검정을 실시하였으며, 16주 복합운동프로그램 전 후 각 집단 내변인들의 변화를 알아보기 위해 대응표본 t-검정을 실시하였다. 모든 통계치의 유의수준은 ${\alpha}$=.05로 처리하여 다음과 같은 결과를 얻었다. 본 연구 결과 대사증후군 지표에서는 허리둘레, 중성지방, 공복혈당, HDL-C에서 유의한 차이를 나타냈고, 자율신경계 요인에서는 통계적으로 모두 유의한 차이가 나타나 저체력군 고등학생에 긍정적인 영향을 미친 것으로 사료되어 진다. The aim of this study is to closely examine the changes in their metabolic syndrome index and autonomic nerve systems after the 16-weeks's combined exercise program is carried out on low-level physical strength group (PAPS 4-5 level students). They were divided into two groups; exercise training group (15) and control group (15). This program consisted of five-times-a-week's warm-ups, main activities and warm-downs and it takes 50 minutes per trial. Through SPSS 19.0, all averages and standard deviations of dependent variables were calculated. We first performed Shapiro-Wilk's normality test of the variables. Before verifying the effect of combined exercise program, we tested the equality of means of the variables between combined-exercise-programmed-group and control group through a two-sample t-test and carried out a paired t-test to check if the changes in the variables of two groups before and after 16 weeks are statistically significant. Every statistical test is performed at a significance level of ${\alpha}$=.05. The results are as follows. When it came to metabolic syndrome index, there were statistically meaningful changes in waist measurement, triglyceride, glucose with empty stomach and HDL-C. Also, when it came to autonomic nerve system, there were meaningful changes in all variables. Consequently, it seems that the 16-weeks combined exercise program has positive effects on low level physical strength students.

저수온기(13-15℃) 치어기 참돔(Pagrus major) 사료 내 비타민 C 대체제로써의 감귤착즙박 및 발효감귤착즙박의 이용 가능성

이초롱 ( Chorong Lee ),김유정 ( Youjeong Kim ),이경준 ( Kyeong Jun Lee ) 한국수산과학회 2015 한국수산과학회지 Vol.48 No.4

This study compared the effects of dietary supplementation of citrus by-product (CBP) and CBP fermented with Bacillus subtilis (F-CBP) on growth performance, feed utilization, intestinal histology and innate immunity of red seabream Pagrus major with three commercial immune-boosting products. The six experimental diets were supplemented with L-ascorbyl-2-polyphosphate (LAPP; the control diet), CBP or F-CBP at a concentration of 100 mg vitamin C equivalent/kg diet or one of three commercial immune boosters. The Experimental diets were fed to triplicate groups of 17 fish (initial body weight, 116 g) for 8 weeks. The water temperature during the feeding trial was maintained at 13-15℃. Growth and feed utilization did not differ significantly among the six dietary treatments, nor did the phagocytic activity, superoxide dismutase or total immunoglobulin concentrations. However, myeloperoxidase activity was significantly higher in the CBP groups. For the intestinal histology, the intestine diameter, villi and enterocyte heights and number of goblet cells did not differ significantly among groups. Therefore, CBP or F-CBP can be used as a valuable eco-friendly byproduct in diets for fishes including red seabream to maintain their normal growth and health.