유산소 운동과 서킷트 웨이트 트레이닝이 비만 여고생의 신체조성 및 혈청지질에 미치는 영향

한재웅,차성웅,염종우,남태호,김태운,백영호 한국운동영양학회 2000 Physical Activity and Nutrition (Phys Act Nutr) Vol.4 No.2

In this study, to find out the effects of aerobics exercise training and CWT on body compositin and serum lipid in obese highschool girls, for 12 weeks, aerobics exercise training group exercised by 60∼85% HRmax of intensity, 4times/week, 60min/days, while CWT group exercised by 40∼55% HRmax of intensity, 3times/week, 50min/days. Finally we have got the following results : 1. For the variations of weight among groups, aerobics exercise training group and obese CWT group showed more decrease than nonobese CWT group by statistically significant difference(p≤.01). For intra-group paired t-test, before and after experiment, all groups showed decrease. In addition, there were significant differences for nonobese aerobics exercise training group(p≤.001), obese aerobics exercise training group(p≤.01) and obese CWT group(p≤.01). 2. For the variations of BMI among groups, obese CWT group showed more decrease than nonobese CWT group by statistically significant difference(p≤.05). For intra-group paired t-test, before and after experiment, all groups showed decrease. In addition, there were significant differences for nonobese aerobics exercise training group(p≤.001), obese aerobics exercise training group(p≤.01) and obese CWT group(p≤.01). 3. For the variations of % fat among groups, obese aerobics exercise training group showed more decrease than nonobese CWT group by significant difference(p≤.05). For intra-group paired t-test, before and after experiment, all groups showed decrease with significant differences(p≤.01). 4. For the variations of LBM among groups, there were no significant differences. while for intra-group paired t-test, before and after experiment, all groups showed increasement. Only obese aerobics exercise training group showed significant differences(p≤.05). 5. For the variations of TC among groups, aerobics exercise training group show more decrease than that of CWT group by significant difference(p≤.001). For intra-group paired t-test, before and after experiment, aerobics exercise training group showed decrease while CWT group showed increment. In addition, there were significant differences for nonobese aerobics exercise training group(p≤.001), obese aerobics exercise training group(p≤01) and nonobese/obese CWT group(p≤.01). 6. For the variations of TG for intra-group paired t-test, before and after experiment, significant difference exist for aerobics exercise training group and nonobese CWT group(p≤.01). 7. For the variations of HDL-C for intra-group paired t-test, obese aerobics exercise training group(p≤.01), nonobese CWT group(p≤.01) and obese CWT group(p≤.001) showed significant differences. 8. For the variations of LDL-C among groups, CWT group showed more increased than aerobics exercise training group by significant difference(p≤.001). For intra-group paired t-test, before and after experiment, aerobics exercise training group showed decrease while CWT group increased. In addition, there were significant differences for nonobese aerobics exercise training group(p≤.001) and nonobese/obese CWT group(p≤.05). 9. For the variations of PLT among groups, obese aerobics exercise training group showed more increment than obese CWT group by significant difference(p≤.01). For intra-group paired t-test, before and after experiment, aerobics exercise training group and nonobese CWT group showed increment while obese CWT group showed decrease. In addition, there were significant differences for nonobese aerobics exercise training group(p≤.01) and obese aerobics exercise training group(p≤05). 10. For the variations of AI among groups, obese aerobics exercise training group showed more decrease than obese CWT group by significant difference(p≤.05). For intra-group paired t-test, before and after experiment, all groups showed decrease. In addition, there were significant differences for nonobese aerobics exercise training group(p≤.001), obese aerobics exercise training group(p≤.05) and obese CWT group(p≤.01). According to the results of this study, for all groups, the decrease of weight, BMI, %fat, TG and AI, the increment of LBM, HDL-C, PLT means that both aerobics exercise training and CWT can be helpful for improving health. Still much to be desired to clarify the contrary result on TC and LDL-C of aerobics exercise training group and CWT group.

R22 대체 냉매의 마이크로 핀관내 흐름 비등 열전달 특성

한재웅,김신종,정동수,김영일 대한설비공학회 2001 설비공학 논문집 Vol.13 No.8

Feasibility of Applying Conductive Heat and Convective Heat to the Drying Process of Safe Solar Salt

한재웅,김웅,이효재 한국농업기계학회 2019 바이오시스템공학 Vol.44 No.4

This study investigated drying characteristics for the production of safe solar salt. The drying characteristics were measured and analyzed at 10-min intervals by drying at 50, 75, and 100 °C for approximately 30 min using three dry heat sources, such as conductive heat (hereafter CDH), convective heat (hereafter CVH), and conductive and convective heat (hereafter CDCVH). The characteristics measured were moisture content, salinity, whiteness, b* (yellowness), and energy consumption. Moisture content tends to decrease with increasing drying time. In particular, the drying rate of the drying method using CDCVH was most rapid (1.22%, w.b./h). The deviation of the moisture content was further increased by using the CVH method. Salinity and whiteness were not significantly different for every experiment. Otherwise, the deviation of the b* value of the drying experiment using the CDCVH was largest. Energy consumption using the CVH method was similar to the drying method using CDCVH, but the cost of the heat generator for the drying method using the CDCVH was more expensive. Therefore, considering the deviation of moisture content after drying, the cost of the heat generator, and the change of the appearance quality (b* value), the drying method using the CVH was most suitable.

장애물 환경에서 과일 수확을 위한 로봇매니퓰레이터 제어에 관한 연구

한재웅,조재훈,김용태 한국지능시스템학회 2023 한국지능시스템학회논문지 Vol.33 No.6

본 논문은 장애물이 있는 환경에서 과일 수확을 위한 로봇 매니퓰레이터 제어 알고리즘을제안한다. 제안된 방법은 딥러닝 알고리즘을 통한 과일과 장애물 인식 결과를 바탕으로 로봇 경로 제어 알고리즘을 사용하여 수확 경로상의 장애물을 효과적으로 회피하게 한다. 먼저 카메라의 내부 파라미터를 추정하고, YOLOv5를 사용하여 과일을 탐지하여 과일 위치를추정하고, 추정된 3차원 좌표를 Hand-Eye 캘리브레이션과 ROS MoveIT 패키지를 사용해로봇 좌표계로 변환한다. 제안된 알고리즘의 경로 계획은 Octomap을 이용해 장애물이 포함된 3D 맵을 구축하고, OMPL(Open Motion Planning Library)의 RRT(Rapidly-exploringRandom Tree)를 사용한다. 실험 결과로 제안된 수확 로봇 제어 알고리즘은 장애물의 유무와 관계없이 효과적으로 목표 과일까지 도달할 수 있음을 확인하였다. This paper proposes a robot manipulator control algorithm for fruit harvesting in anenvironment with obstacles. The proposed method uses a robot path controlalgorithm to effectively avoid obstacles on the harvest path through fruit andobstacle recognition using a deep learning algorithm. First, the intrinsic parametersof the camera are estimated, the fruit is detected using YOLOv5 to estimate thefruit position, and the estimated 3D coordinates are converted to the robotcoordinate system using Hand-Eye calibration and the ROS MoveIT package. Forthe path planning of the proposed algorithm, a 3D map containing obstacles wasconstructed using Octomap and the Rapidly-exploring Random Tree (RRT) ofOMPL (Open Motion Planning Library) was used. As a result of the experiment, itwas confirmed that the proposed harvest robot control algorithm can effectivelyreach the target fruit regardless of the presence or absence of obstacles.

System Design and Performance Analysis of a Variable Frequency LED Light System for Plant Factory

한재웅,강태환,이승기,한충수,김웅 한국농업기계학회 2014 바이오시스템공학 Vol.39 No.2

Purpose: The purpose of this study was to design a variable frequency LED light system for plant factory which combinedred, blue, green, white, and UV lights and controlled the ratio of the light wavelength. In addition, this study evaluated theperformance of each combination of LED to verify the applicability. Methods: Four combinations of LED (i.e. Red+Blue,Red+Blue+Green, Red+Blue+White, Red+Blue+UV) were designed using five types of LED. The system was designed tocontrol the duty ratio of each wavelength of LED by 1% interval from 0~100%, the pulse by 1Hz interval from 1~20kHz. Response characteristics of the control system, spectral distribution of each combination, light uniformity and uniformityratio were measured to test the performance of the system. Results: Clean waveforms were measured from 10Hz to 10kHzregardless of duty ratio. Frequency distortion was observed within 5% of inflection point at frequencies above 10kHzregardless of duty ratio, but it was judged negligible. Spectra showed a normal distribution, and maximum PPF with dutyratio of 100% was 271.4즗mol좪m-2좪s-1 for the Red+Blue combination. PPF of the Red+Blue+Green combination was 258.9즗mol 좪m-2좪s-1, and that of the Red+Blue+White combination was 273.9즗mol좪m-2좪s-1. PPF of the Red+Blue+UV combination was267.7 즗mol좪m-2좪s-1. Uniformity ratio for the area excepting border showed 0.90 for the Red+Blue and Red+Blue+Whitecombinations, 0.87 for the Red+Blue+Green combination, and 0.88 for the Red+Blue+UV combination. The light wasirradiated evenly at the area excepting border, so it was suitable for plant growing. Conclusions: From the results of thisstudy, response characteristics of the control system, spectral distribution of each combination, light uniformity anduniformity ratio were suitable for applying into the plant factory.

R22 대체냉매의 수평원관내 흐름비등 열전달 특성

한재웅,김신종,정동수,김영일 대한설비공학회 2001 설비공학 논문집 Vol.13 No.4

순환식 병류형 곡물건조기 개발(II)-시뮬레이션모델의 검증-

한재웅,금동혁,김훈,홍상진 한국농업기계학회 2007 바이오시스템공학 Vol.32 No.5

This study was performed to develop a simulation model of circulating concurrent-flow rice dryer. The simulation model consists of drying model, tempering model and crack prediction model. The drying and tempering models were developed based on mathematical analysis, and the crack prediction model was developed by thin layer drying tests. Rice drying tests were done with three replications by use of a pilot scale dryer of holding capacity of 700 kg. Experimental values for moisture content, rice temperature, rice crack, and drying energy were compared with predicted values by simulation model. The RMSEs of predicted moisture contents were ranged from 0.5807%(d.b.) to 1.1951%(d.b.). and the coefficients of determination were 0.9688 to 0.9812. The RMSEs of predicted rice temperatures at the exit of the drying chamber were 1.83 to 3.81℃ and the coefficients of determination were 0.8834 to 0.9482. The results for moisture contents and rice temperatures showed very good relationships between predicted values and experimental values. The RMSEs of predicted value of crack ratio were 0.4082 to 0.7967% and the coefficients of determination were 0.8742 to 0.9547. 다음과 같다.1. 순환식 병류형 건조기의 시뮬레이션 모델에 의한 예측함수율의 RMSE는 0.58~1.2% (d.b), 결정계수는 0.9688~0.9812로 높게 나타났다..

하지 정맥류에 대한 광투시 전동형 정맥적출술의 초기보고

한재웅,한상윤,조지웅,윤호영,김지원,김병천,정봉화,정경석 대한외과학회 2004 대한외과학회 학술대회 초록집 Vol.2004 No.5

Association Between a Close Distal Resection Margin and Recurrence After a Sphincter-Saving Resection for T3 Mid- or Low-Rectal Cancer Without Radiotherapy

한재웅,이민재,박하경,신재호,하태권,김광희,배기범,김태현,최창수,오상훈,오민경,강미선,홍관희,안민성 대한대장항문학회 2013 Annals of Coloproctolgy Vol.29 No.6

Purpose: To maintain the patient’s quality of life, surgeons strive to preserve the sphincter during rectal cancer surgery. This study evaluated the oncologic safety of a sphincter-saving resection with a distal resection margin (DRM) <1 cm without radiotherapy in T3, mid- or low-rectal cancer. Methods: This retrospective study enrolled 327 patients who underwent a sphincter-saving resection for proven T3 rectal cancer located <10 cm from the anal verge and without radiotherapy between January 1995 and December 2011. The oncologic outcomes included the 5-year cancer-specific survival, the local recurrence, and the systemic recurrence rates. Results: In groups A (DRM ≤1 cm) and B (DRM >1 cm), the 5-year cancer-specific survival rates were 81.57% and 80.03% (P = 0.8543), the 5-year local recurrence rates were 6.69% and 9.52% (P = 0.3981), and the 5-year systemic recurrence rates were 19.46% and 23.11% (P = 0.5750), respectively. Conclusion: This study showed that the close DRM itself should not be a contraindication for a sphincter-saving resection for T3 mid- or low-rectal cancer without radiotherapy. However, a prospective randomized controlled trial including the effect of adjuvant therapy will be needed.

회절격자 주기의 랜덤 변이가 DFB 레이저 특성에 미치는 영향

한재웅,김상배,Han, Jae-Woong,Kim, Sang-Bae 대한전자공학회 2000 電子工學會論文誌-SD (Semiconductor and devices) Vol.37 No.8

회절격자 주기의 랜덤 변이가 DFB 레이저의 특성에 미치는 영향을 유효 굴절률 전달 매트릭스 방법을 이용하여 해석하였다. 레이저의 양 거울면은 완전 무반사 처리되었다고 가정하였으며, 회절격자 주기의 변이는 Gaussian 랜덤 변수로 표현하였다. 회절격자 주기의 랜덤 변이는 균일 회절격자 DFB 레이저와 QWS-DFB 레이저 스펙트럼의 대칭성을 깨뜨리고 유효 결합계수를 감소시킨다. 이에 따라 균일 회절격자 DFB 레이저에서는 ${\pm}$1모드 거울면 손실의 평균값이 증가하고 금지 대역폭이 감소하며, QWS-DFB 레이저에서는 단일모드 안정성과 파장 정확도가 저하된다. QWS-DFB 레이저의 거울면 손실 차이는 결합계수에 관계없이 회절격자 주기의 랜덤 변이가 카짐에 따라 감소하고, spatial hole-burning 효과는 정규화된 결합계수가 1.5보다 클 때에는 주는 데 반하여 작을 때에는 커진다. Effects of the random fluctuation in grating half-period have been studied by an effective index transfer matrix method in DFB lasers. The laser facets are assumed to be perfectly antireflection coated, and the period fluctuation is modeled as a Gaussian random variable. The random fluctuation breaks spectral symmetry in both uniform-grating and quarter-wavelength -shifted(QWS) DFB lasers, and decreases the effective coupling coefficient. This leads to increased average mirror loss of ${\pm}$1 modes and reduced stopband width in uniform grating DFB lasers, and degradation in the wavelength accuracy and the single mode stability in QWS-DFB lasers. Threshold gain difference decreases with increasing period fluctuation irrespective of grating coupling coefficient in QWS-DFB lasers, while spatial hole-burning effect is exacerbated or alleviated when the normalized coupling coefficient is lower and higher than 1.5, respectively.