A Study on Real-Time Slope Monitoring System using 3-axis Acceleration

유소월,배상현 조선대학교 기초과학연구원 2017 조선자연과학논문집 Vol.10 No.4

The researcher set up multiple sensor units on the road slope such as national highway and highway where there is a possibility of loss, and using the acceleration sensor built into the sensor unit the researcher will sense whether the inclination of the road slope occur in real time, and Based on the sensed data, the researcher tries to implement a system that detects collapse of road slope and dangerous situation. In the experiment of measuring the error between the actual measurement time and the judgment time of the monitoring system when judging the warning of the sensor and falling rock detection by using the acceleration sensor, the error between measurement time and the judgment time at the sensor warning was 0.34 seconds on average, and an error between measurement time and judgment time at falling rock detection was 0.21 seconds on average. The error is relatively small, the accuracy is high, and thus the change of the slope can be clearly judged.

A Study on Efficient Cluster Analysis of Bio-Data Using MapReduce Framework

유소월,배상현,이광옥 조선대학교 기초과학연구원 2014 조선자연과학논문집 Vol.7 No.1

This study measured the stream data from the several sensors, and stores the database in MapReduce framework environment, and it aims to design system with the small performance and cluster analysis error rate through the KMSVM algorithm. Through the KM-SVM algorithm, the cluster analysis effective data was used for U-health system. In the results of experiment by using 2003 data sets obtained from 52 test subjects, the k-NN algorithm showed 79.29% cluster analysis accuracy, K-means algorithm showed 87.15 cluster analysis accuracy, and SVM algorithm showed 83.72%, KM-SVM showed 90.72%. As a result, the process speed and cluster analysis effective ratio of KM-SVM algorithm was better.

A Study on Emergency Monitoring Robot System by Back-Propagation Algorithm

유소월,배상현,이광옥,김미애 조선대학교 기초과학연구원 2014 조선자연과학논문집 Vol.7 No.1

This study aims to implement the emergency monitoring robot system which predicts the current state of the patients without visiting the medical institutions by measuring the basic health status of the user's blood pressure, heartbeat, and basic health status of body temperature in the disaster emergency situation based on the Smart Grid. By arranging a large number of sensor(blood pressure, heartbeat, body temperature sensor) and measuring the bio signs, so the attached wireless XBee sensor can be stored in DB of robot, and it aims to draw the current state of the patients by analysis of stored bio data. Among 300 data obtained from the sensor, 1st data to 100th data were used for learning, and from 101st data to 300th data were used for assessment. 12 results were different among the total 300 assessment data, so it shows about 96% accuracy.

파노라마 이미지 기반 3차원 공간 구성 시스템 설계

유소월,김태연 사단법인 인문사회과학기술융합학회 2019 예술인문사회융합멀티미디어논문지 Vol.9 No.2

In this paper, we want to construct a 3D space with panorama images without additional equipment. In other words, the panorama images taken by the user are input to the system proposed in this paper, and then the edge feature points of the image are extracted. In addition, we construct a 3D space using extracted feature points and construct a space by measuring relative distances between feature points by using Euler angle and 3D-TM algorithm. The conventional triangulation method does not know the height measured by the user since the result is two dimensional. In this paper, we tried to solve these problems by using 3D triangulation method. In order to evaluate the performance of the proposed panorama image-based 3D spatial composition system, the error rate of the proposed system was obtained by comparing the measured Kreal value with the measured k value of the experimental environment. As a result of the performance evaluation, the system of this paper using the proposed algorithm has an error of less than 35cm and an error rate of 1.279%. Therefore, we expect the efficiency of the proposed system to be high. 본 논문에서는 추가적인 장비 없이 파노라마 이미지로 3차원 공간을 구성하고자 하였다. 즉, 사용자가 촬영한 파노라마 이미지를 본 논문에서 제안한 시스템으로 입력받은 후 영상의 모서리 특징점을 추출하였다. 또한, 추출한 특징점을 이용하여 3차원 공간을 구성하고 오일러 각과 3D-TM 알고리즘을 이용하여 특징점들 위치 사이의 상대적 거리를 측정하여 공간을 구성하였다. 기존의 삼각측량법은 2차원으로 결과가 나오기 때문에 사용자가 측정한 높이를 알 수 없다. 이에 본 논문에서는 3차원 삼각측량법을 이용하여 이와 같은 문제점을 해결하고자 하였다. 제안한 파노라마 이미지 기반 3차원 공간 구성 시스템을 성능 평가하기 위해 실험환경의 실측 데이터인 Kreal값과 측정된 k값을 비교하여 제안한 시스템의 오차율을 구하였다. 성능 평가 결과 제안한 알고리즘을 사용한 본 논문의 시스템은 35㎝이내의 오차가 측정되었으며 1.279%의 오차율을 보였다. 이에 본 논문에서 제안한 시스템의 효율성이 높을 것이라 기대한다.

가속도센서를 이용한 도로비탈면 실시간 센싱 시스템 구현

유소월 ( So-wol Yoo ),강동식 ( Dong-shik Kang ),배상현 ( Sang-hyun Bae ) 조선대학교 공학기술연구원 2017 공학기술논문지 Vol.10 No.1

A real time road slopes sensing system using acceleration sensor implemented in this study is able to sense the slope and risk conditions along expressways and highways in real time, to detect slope collapse and a dangerous situation on the basis of the sensing data, and thereby to notify the sensing system of the state in real time and give a warning to drivers on road to minimize damage. This study produced a sensor unit to detect the slope state along road and a control unit, and designed a photovoltaic unit to supply power in consideration of difficult power supply situation. To evaluate the performance of the implemented system, the sensor unit connected through RS-485 communication line was fixed at an experimental model slope. In the experiment, an impact was imposed on the sensor unit in various motion directions. As a result, the monitoring system displayed a sensor warning message when there was continuous oscillation more than 5 seconds or an inclination of more than 5 degrees, and displayed a rockfall detection message when there was a upper falling rock impact.

스트레스에 따른 감성 LED 제어 시스템 설계 및 구현

유소월(So-Wol Yoo),오시덕(Si-Duck Oh),배상현(Sang-Hyun Bae) 한국정보기술학회 2010 Proceedings of KIIT Conference Vol.2010 No.-

스트레스에 따른 감성컬러 LED매칭 시스템은 스트레스 측정 단말기, 생체정보 DB, 감성컬러 표준화 DB와 조명제어 시스템으로 구성된다. 스트레스 단말기로부터 Zeegbee 무선통신을 통해 전송된 스트레스 지수를 DE-Algorithm을 통해 표준화, 단계화 하고 감성컬러와 매칭한 후 그 컬러 값에 해당하는 LED조명 시스템을 설계 및 구현한다. A sensitivity color LED matching system according to the stress is composed of a stress measurement terminal, living body information DB, sensitivity color standardize DB, a lighting control system. We conformed a stress exponent to be sent from a stress terminal through the Zeegbee wireless communication through the DE-Algorithm. And LED lighting system which corresponds to a color price was a design and implementation after matching sensitive color.

생체 신호를 이용한 스마트 헬스케어 모니터링 시스템 설계 및 구현

유소월(So-Wol Yoo),배상현(Sang-Hyun Bae) 한국정보전자통신기술학회 2017 한국정보전자통신기술학회논문지 Vol.10 No.5

인간의 건강에 대한 관심 증가에 맞춘 상시적인 질병 관리를 위해 다수 개의 측정센서를 이용하여 측정된 생체신호를 융합한 임계값을 분석하여 개개인의 맞춤형 진단을 위한 모니터링 시스템을 구현하고자 한다. 성능평가 결과 생체 신호의 분석을 위한 SVM 알고리즘은 평균 2%의 오차율이 나타났으며, 윈도우의 크기를 5000으로 분할했을 때 저장 공간의 최대 19.2%를 축소함으로써 효과적임을 보였다. 분류의 정확도는 윈도우 크기를 5000으로 분할했을 때 97.2%로 가장 높은 정확도를 보였다. 또한 총 5000개의 생체 신호 집합의 분석 결과 중 84개의 결과가 다르게 나왔으나 시스템으로부터의 결과가 전문가의 진단 결과보다 더 낮은 경우는 발생하지 않았으며, 약 98%의 정확도를 보였다. This paper intend to implement monitoring systems for individual customized diagnostics to maintain ongoing disease management to promote human health. Analyze the threshold of a measured biological signal using a number of measuring sensors. Performance assessment revealed that the SVM algorithm for bio-signal analysis showed an average error rate of 2 %. The accuracy of the classification is 97.2%, and reduced the maximum of 19.2% of the storage space when you split the window into 5,000 pieces. Out of the total 5,000 bio-signals, 84 results showed that results from the system were differently the results of the expert’s diagnosis and showed about 98 % accuracy. However, the results of the monitoring system did not occur when the results of the monitoring system were lower than that of experts. And About 98% accuracy was shown.

PPG 센서 기반 지능형 제어 시스템의 설계

김태연,유소월 사단법인 인문사회과학기술융합학회 2019 예술인문사회융합멀티미디어논문지 Vol.9 No.12

Sleep is an essential part of human life, as it is a time of human physical and mental relaxation and compensation, as well as a basic human physiological need. The inability to sleep normally due to various obstructions is in line with the fact that it does not lead to a normal life. Therefore, in this paper, we propose an intelligent Light Emitting Diode (LED) lighting control system, which is controlled according to five stages of defined sleep, after obtaining biometric information with Photoplethysmography (PPG) sensors within wearable devices worn on the user's wrist to reduce sleep degradation and improve sleep quality. The intelligent control system measures the user's heart rate through PPG sensors in wrist band-type wearable devices and stores data analyzed through PPG signal analysis algorithms in a biometric information database. The stored data are transferred to the standardized database and classified and stored according to the five stages of sleep defined in this paper. It implements brightness values corresponding to sleep stage through LED lighting system and can check user's heart rate, sleep level, brightness and list through Smart Phone application. For the performance evaluation of the proposed system, an average of 86.947% accuracy was obtained through 10-fold cross-validation. The response time of the system was evaluated as instant response time (0.738 seconds) and the response speed of the PPG sensor was instantaneous (0.157 seconds). 수면은 인간의 기본적인 생리적 욕구임과 동시에 인간의 신체적, 정신적 휴식 및 보상의 시간으로서 인간 삶의 필수적인 요소라 할 수 있다. 다양한 방해 요소로 인하여 정상적인 수면을 취하지 못한다는 의미는 곧 정상적인 생활을 영위하지 못한다는 의미와 일맥상통한다. 이에 본 논문에서는 빛에 의한 수면의 질 저하를 줄이고 수면의 질을 높이기 위해 사용자의 손목에 착용 되어있는 웨어러블 디바이스 내의 PPG(Photoplethysmography) 센서로 생체 정보를 획득한 후 수면상태의 깊이를 정의하고 정의된 수면의 5단계에 따라 제어되는 지능형 LED(Light Emitting Diode) 조명제어 시스템을 제안하고자 한다. 지능형 제어 시스템은 손목 밴드형 웨어러블 디바이스 내의 PPG 센서를 통해 사용자의 심박 수를 측정한 후 PPG 신호 분석 알고리즘을 통해 분석된 데이터를 생체 정보 데이터베이스에 저장한다. 저장된 데이터를 표준화 데이터베이스로 전송하여 본 논문에서 정의한 5단계의 수면 단계에 따라 분류하여 저장한다. 수면 단계에 대응되는 밝기 값을 LED 조명 시스템을 통해 구현하며 스마트 폰 애플리케이션을 통해 사용자의 심박 수와 수면 단계, 밝기, 리스트를 확인할 수 있다. 제안한 시스템의 성능 평가를 위해 10겹 교차 검증을 통해 평균 86.947%의 정확도를 구할 수 있었으며 시스템의 응답속도는 0.738초로 즉각적, PPG 센서의 응답속도는 0.157초로 순간적으로 평가되었다.

ESG-oriented Governance Work System for Smart Highway Implementation

윤봉식,유소월 (사)한국스마트미디어학회 2022 스마트미디어저널 Vol.11 No.10

This study was promoted to prepare an ESG-oriented work system for Korea Expressway Corporation through sustainable highway construction, IOT-based smart highway preparation, and establishment of a broad convergence business governance system between multiple ministries and implementing entities. Based on the 2nd Basic Plan for Landscape Policy (2020~2024) and the Public Design Promotion Act (2018~2022), the study was conducted through the improvement of the highway design method to be applied for four years from 2021 to 2024, the changes in construction and social conditions related to expressways, the analysis of policies and plans to secure consistency with the 'Korean New Deal', and the analysis of the project performance and work promotion system that the Korea Expressway Corporation's business execution organization has promoted together with each government department. The results of this research are expected to help the Korea Expressway Corporation establish the 21st Innovation Plan for the phased construction of a "100-years landscape with people" and the preparation of a sustainable future highway environment creation project for the lives and safety of the people.

온라인콘텐츠 개발프로세스의 효율성 측정방법 연구

윤봉식,유소월 (사)한국스마트미디어학회 2022 스마트미디어저널 Vol.11 No.1

With the development of online commercializing technology and the growth of online market, it has become extremely important for companies that aim to commercialize their products and services to control time and resources. Even when a single company has control over the entire process, it is necessary to maintain the efficiency among the process of development. In particular, when there is a lot of cooperation throughout the course of development, requiring many parties to communicate with each other, the issue of declining efficiency becomes much clearer. The timing of when to launch a product or service has become just as important as completing and testing them for companies. Companies have developed new tools to prevent situations that may lead to inefficiency in the development process, including an increase in the amount of resource used or issues with security maintenance. However, there is a lack of proper measurement tool that assesses what kind of additional benefits the entire process of the company is bringing, or whether or not the processes need to be improved in certain areas. Thus, this study aims to suggest a method to measure efficiency, to provide an empirical efficiency measurement method for the development process of online content. 온라인 사업화 기술의 발달과 온라인 시장의 확대로 콘텐츠를 개발하고 사업화하는 기업에게는 시간과 재원을 통제하는 것이 매우 주요한 과업이 되었다. 단일 기업이 전 프로세스를 통제하는 경우에도 개발공정 간의 효율성은 매우 중요하며 특히 소통주체가 많아지는 협력과정을 통한 개발의 경우에는 협업 공정 간 효율성이 저하되는 문제점이 보다 크게 나타나게 된다. 기업들에게 개발품의 완성과 검수 못지않게 출시 시점이 중요해졌고, 개발 기간의 정체에 따른 투입 재원의 증가와 보안 유지 문제 등 개발 효율성이 저해될 수 있는 여건들을 개선하기 위해 새로운 툴을 갖추게 되었다. 하지만 기업들이 적용 중인 전사적 공정이 어떠한 효익을 부가적 성과로 내고 있는지 또는 개선이 필요한지에 대해 측정 도구가 적정치 않다. 이에 본 연구에서는 효율성 측정방법의 제안과 기업들의 프로세스 개선 결과에 대한 효율성 측정실험을 통해 콘텐츠개발 프로세스의 실증적 효율성 측정방법을 제안하고자 한다.