• 전기학회논문지P
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• 제59권1호
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• pp.1-9
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• 2010

This paper summarizes an education and training system for the auto-reclosing of power transmission system using a real time digital simulator. The system is developed to understand the principle of reclosing and the sequence of automatic reclosing schemes, and practice the effects of reclosing actions to power system in real-time simulator. This study is concentrated into the following two parts. One is the development of real time education and training system of automatic reclosing schemes. For this, we use the RTDS(real time digital simulator) and the actual digital protective relay. The mathematical relay model of RTDS and the actual distance relay which is equipped automatic reclosing function are also used. The other is the user friendly interface between trainee and trainer. The various interface displays are used for user handing and result display. The conditions of automatic reclosing which is a number of reclosing, reclosing dead time, reset time, and so on, can be changed by the user interface panel. A number of scenario cases are reserved for the education and training. Through the test, we verified that the proposed system can be effectively used to accomplish the education and training of automatic reclosing.

• 경제분석
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• 제27권2호
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• pp.41-70
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• 2021

본 연구에서는 2017년과 2019년 이민자 체류실태 및 고용조사 자료를 이용하여 직업훈련 프로그램이 외국인의 노동시장 성과에 미치는 영향을 분석하였다. 성향점수매칭(propensity score matching)을 적용한 분석 결과를 살펴보면, 직업훈련은 평균적으로 외국인들의 고용률을 6.4%p 높였으며 월평균임금을 상승시키는 효과도 있었다. 또한, 체류자격에 따라 상이한 효과가 나타났는데 먼저 취업비자로 들어온 외국인은 훈련참여의 결과로 고용률이 크게 높아지지 않았지만 임금 상승효과는 상당히 컸다. 반면, 결혼이민자의 경우 임금에 대한 긍정적 효과가 관찰되지 않았다. 정주비자 소지자는 훈련을 통해 고용률과 임금이 모두 증가하였다.

• Physical Therapy Rehabilitation Science
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• 제12권3호
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• pp.251-258
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• 2023

Objective: The practice of breathing exercises involves altering the depth and frequency of respiration. Strengthening respiratory muscles plays a crucial role in maintaining overall health and well-being. The efficiency of the respiratory system affects not only physical activity but also various physiological processes including cardiovascular health, lung function, and cognitive abilities. The study evaluated the reliability of the developed device for inspiratory/expiratory training using pressure sensors and Bluetooth connectivity with a smartphone application. Design: Design & development research Methods: The research methodology involved connecting a custom-made respiratory sensor to an IMT-PEP BIC Breath device. Various pressure conditions were measured, and statistical analyses were performed to assess reliability and consistency. Results showed high Intraclass Coefficient Correlation (ICC) values for both inspiratory and expiratory pressures, indicating strong test-retest reliability. The device was designed for ease of use and wireless monitoring through a smartphone app. Results: This study conducted at expiratory pressure confirmed the proper operation of the IMT/PEP breathing trainer at the specified pressure setting in the product. The pressure sensor demonstrated high test-retest reliability with an ICC value of 0.999 for both expiratory and inspiratory pressure measurements. Conclusions: The developed respiratory training device measured and monitored inspiratory and expiratory pressures, demonstrating its reliability for respiratory training. The system could be utilized to record training frequency and intensity, providing potential benefits for patients requiring respiratory interventions. Further research is needed to assess the full potential of the device in diverse populations and applications.

• 한국실천공학교육학회논문지
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• 제4권1호
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• pp.140-145
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• 2012

본 논문은 정부가 2011년 9월 15일부터 시행하고 있는 내일배움카드제훈련의 제도개선내용을 직업훈련위탁사업의 성공조건의 이론적 틀을 토대로 평가한 후 추가적인 발전방안을 모색하고자 한다. 정부가 개선한 내일배움카드제는 기존의 직업훈련계좌제가 가지고 있었던 내일배움카드제훈련시장의 불안정성을 부분적으로 해소하고, 계좌 발급과 고용서비스 간의 연계를 강화하여 계좌의 남발을 억제하며, 내일배움카드제훈련의 운용과정에서 발생해온 경직성을 부분적으로 해소하는 등 그동안 지적되어온 여러 가지 문제점을 해소하는데 상당히 기여할 것으로 평가되었다. 그러나 아직도 훈련시장의 불안정성을 해소하면서 경쟁에 의한 더 나은 훈련 서비스를 유도하기에는 크게 미흡하고, 계좌 발급과 고용서비스와의 긴밀한 연계를 통해 필요한 사람에게 필요한 훈련서비스를 맞춤형을 제공하는데도 한계가 있는 것으로 분석되었다. 또한 적합훈련과정의 심사, 훈련의 품질 평가 및 모니터링, 훈련비의 적정성 검증 등을 강화하기 위한 인프라도 크게 확충하여야 내일배움카드제훈련이 정착될 수 있을 것으로 평가되었다.

• 실천공학교육논문지
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• 제6권1호
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• pp.37-42
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• 2014

자동 시각 검사 장비는 전 세계적으로 제조업 기반의 기업들의 공장 자동화 시스템의 주요 장비로 자리 잡고 있다. 반도체, LCD, 철강, 제지 등 다양한 분야에서 품질관리의 자동화를 위하여 필수적으로 활용되고 있다. 그러나 대학, 직업전문학교 등의 교육기관에서는 이에 대한 교육이 거의 이뤄지지 못하고 있다. 본 논문에서는 자동 시각 검사 시스템의 기술훈련을 위하여 라인스캔 카메라 기반의 자동 시각 검사 장비 교육을 위한 실습 장비에 대해서 다루고 있다. 제작된 시스템은 산업현장에 널리 사용되고 있는 X-Y stage 기반으로 구성되었으며, 영상의 픽셀해상도는 $10-30{\mu}m$의 범위에서 가변적으로 조절 가능하다. 또한 조명구조에 따른 영상효과를 확인하기 위하여, 측면 직사조명과 동축조명을 장착하여 활용할 수 있도록 구성되어 있다. 이는 훈련자가 실습환경에서 다양한 조건들을 변경시키며 실습을 수행할 수 있음을 의미하며, 실제 제조 현장에서 활용되는 라인스캔 카메라 기반의 머신비전 시스템과 거의 동일한 기능을 수행하도록 제작되었다.

• 디지털융복합연구
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• 제15권7호
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• pp.297-306
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• 2017

본 연구는 뇌졸중 환자에게 균형훈련과 동시에 장딴지근에 테이핑을 적용하여 발목관절 경직 및 균형능력에 미치는 영향을 알아보고자 진행된 연구이다. 뇌졸중 환자 25명은 장딴지근에 테이핑을 적용한 상태에서 균형훈련을 한 연구군 14명, 거짓 테이핑을 적용한 상태에서 균형훈련을 한 대조군 11명으로 나뉘었다. 경직 평가는 수정된 ashworth 척도로 점수화 하였고, 균형능력 평가는 기능적 팔뻗기와 일어나 걸어가기 검사, TETRAX를 이용하여 눈 뜨고 감은 상태에서의 안정성 지수(stability index), 왼쪽 오른쪽 체중지지도, 앞 뒤 체중지지도를 선택하여 분석하였다. 연구군은 경직, 기능적 팔뻗기, 일어나 걸어가기, 눈 뜨고 감은 상태에서의 안정성 지수, 왼쪽 오른쪽 체중지지도, 앞 뒤 체중지지도에 유의한 개선이 있었다. 두 군간 비교에서는 연구군이 대조군보다 기능적 팔뻗기, 일어나 걸어가기, 눈 뜬 상태에서 안정성 지수, 왼쪽 오른쪽 체중지지도, 눈 감은 상태에서 왼쪽 오른쪽 체중지지도 앞 뒤 체중지지도에 유의한 개선을 보였다. 테이핑 적용상태에서 단기간의 균형훈련은 뇌졸중 환자의 경직 및 균형능력에 효과적인 것을 알 수 있었다. 그러므로 피부에 손상 및 이상이 없는 뇌졸중 환자라면 균형재활에 있어 장딴지근 테이핑 적용을 적극 권고하는 바이다.

• 한국의류학회지
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• 제40권5호
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• pp.775-787
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• 2016

This study examined the wearing conditions of compression wear for weight training. Compression wear has recently received significant attention from the public and athletes as high-level functional sportswear. The survey was conducted on 373 men in their 20s for general information on purchase behavior, preferred brand, function, and preferred design. The majority of participants (n=181) were aware of the function of compression wear. The most selected reason for wearing compression wear was for its convenience during sports activities. Respondents had the greatest preference for designs with a round neckline, regular leggings type, upper arm-length sleeve, and thigh-length bottom. Respondents also wanted a stronger compression in the core muscle part (abdomen, back, and waist).

• Smart Structures and Systems
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• 제24권6호
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• pp.745-757
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• 2019

Road surface deteriorations such as potholes have caused motorists heavy monetary damages every year. However, effective road condition monitoring has been a continuing challenge to road owners. Depth cameras have a small field of view and can be easily affected by vehicle bouncing. Traditional image processing methods based on algorithms such as segmentation cannot adapt to varying environmental and camera scenarios. In recent years, novel object detection methods based on deep learning algorithms have produced good results in detecting typical objects, such as faces, vehicles, structures and more, even in scenarios with changing object distances, camera angles, lighting conditions, etc. Therefore, in this study, a Deep Learning Pothole Detector (DLPD) based on the deep region-based convolutional neural network is proposed for autonomous detection of potholes from images. About 900 images with potholes and road surface conditions are collected and divided into training and testing data. Parameters of the network in the DLPD are calibrated based on sensitivity tests. Then, the calibrated DLPD is trained by the training data and applied to the 215 testing images to evaluate its performance. It is demonstrated that potholes can be automatically detected with high average precision over 93%. Potholes can be differentiated from manholes by training and applying a manhole-pothole classifier which is constructed using the convolutional neural network layers in DLPD. Repeated detection of the same potholes can be prevented through feature matching of the newly detected pothole with previously detected potholes within a small region.

• International Journal of Advanced Culture Technology
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• 제7권1호
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• pp.209-215
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• 2019

In order to provide a safe free-weight-training environment to people without workout trainers, we suggest a smart bench press machine with an automatic weight control system sensitive to user tiredness. Physical weight plates on the machine are replaced with a hydraulic cylinder as a press load and the cylinder knob is coupled with a step motor to change its tensile force automatically in-between lifting exercises. Three subjects participated to verify the usability of the smart bench press machine. They were asked to lift a 6-RM press load 10 times with 3 different lifting conditions: 1) no assistance, 2) a human assistance, and 3) the automatic weight control. All subjects were not able to complete the 10 sets without assistance due to tiredness, but they finished the full sets under the two assistive conditions. Average lifting speeds under the automatic weight control condition showed the most consistent level. Normalized quasi-tension data based on surface electromyogram signals of both Pectoralis Majors revealed that the subjects maintained the target muscle activation level above 50% but not more than 80% throughout the 10 sets. Therefore, the smart bench press machine is expected to both keep pace with the lifting exercise and reduce risk of injuries due to excessive muscle tensions.

• The Journal of Korean Physical Therapy
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• 제26권5호
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• pp.365-371
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• 2014

Purpose: The aim of this study is to examine the effects of training in vestibular sensory stimulation on balance and gait of stroke patients. Methods: Twenty patients were randomly assigned to either the experimental group (n=10) or the control group (n=10). Patients in the experimental group received rotational stimulation training, vertical-horizontal stimulation training, gait training on a flat surface with vestibular sensory stimulation, and gait training on soft ground with vestibular sensory stimulation. Patients in the control group received general treadmill gait training. The intervention was applied four times per week, 25 minutes each time, for a period of four weeks. We measured Berg Balance Scale (BBS), Biodex Balance System, Timed up to Go (TUG) test and Dynamic Gait Index (DGI) to evaluate balance and gait ability. Results: BBS differed significantly in both groups between before and after the intervention (p<0.05) and changes in BBS after the intervention differed between the two groups (p<0.05). According to the Biodex Balance System test result, only the experimental group showed significant changes in balance in the conditions of static eyes open (SEC), dynamic eyes open (DEO), and dynamic eyes closed (DEC) (p<0.05). TUG test results differed significantly between prior to and after the training in both the experimental group and the control group (p<0.05) and changes in TUG after the intervention differed significantly between the two groups (p<0.05). DGI results showed significant change after the intervention in the experimental group only (P<0.05). Conclusion: Training in vestibular sensory stimulation was effective in improving static-dynamic balance and gait ability of stroke patients.