U-City 생활 안전을 위한 상황 예측 지원 시스템 설계

조재혁(Jae-Hyuk Cho) 한국정보기술학회 2010 한국정보기술학회논문지 Vol.8 No.8

There are many researches to realize intelligent life safety service for u-City's facility management, prevention of crimes, flood and watch of fire. I demands a complex and intellectual and real-time Context-Aware and Prediction technology based intelligent life safety system more than existent simplicity CCTV and situation control. In this paper, various sensors collect information as context and I proposes a context-aware reasoning system and can reflect user's intention that use empirical context management and presented system providing service to user. I Modeled object, context information that stand on the basis OWL of ontology language. Also, for example, I presented inference engine and mining search engine. Finally, life safety context aware and prediction service can support efficient by appling to scenario of real life.

과학기술 정보 활용도 제고를 위한 정보연계 구축 방안에 대한 연구

조재혁(Jae-Hyuk Cho) 한국정보기술학회 2009 한국정보기술학회논문지 Vol.7 No.5

Creation, spread and utilization of the quality science & technology knowledge has emerged as one of the main issues that a country needs to tackle in order to enhancing the productivity of the science & technology. But, the science & technology Information is insufficient link mutually because is constructed by breakup according to purpose and computerization, standardization for process of the science & technology research planning, achievement, outcome spread are unprepared state. Thus, this paper suggest to construct integrated database that use Web services, XML framework and other thing proposes to construct real-time link system that collects and stores and searches meta data and offers original paper. In case of use actively, this system will be able to construct transparent and open research support system because the science & technology relevant information is grasped seamless synthetically. Also, it may raise decision-making support and information usability degree through systematic spread and public ownership of the science & technology knowledge.

U-City에서 상황인지 및 예측을 위한 모니터링 시스템에 관한 연구

조재혁(Jae-Hyuk Cho) 한국정보기술학회 2010 한국정보기술학회논문지 Vol.8 No.4

Recently, there are many researches to provide Human's life and city life service efficiently based on an pervasive computing and u-City technology. In this study, we collect context information for context-awareness through various sensor of city, and we'll process this information to manage empirical context that can reflect users' intention and to predict post processing that take advantage of existing basis. It will provide users with service through their mobile devices and Internet. Using OWL(Web Ontology Language) which can construct information at sensor or device and express information of mutual relation, we performed connection test among contextual information in various intelligence space. we propose monitoring system that take advantage of several functions such as U-City's u-Life Safe, u-Light Management, u-Water Management, u-Waste Management, u-Structure Management, u-3D Construction.

ICT 기반 환경모니터링 센서 데이터 검증을 위한 원스탑 플랫폼

채민아,조재혁,Chae, Minah,Cho, Jae Hyuk ICT플랫폼학회 2021 JOURNAL OF PLATFORM TECHNOLOGY Vol.9 No.1

기존 환경측정기기는 전자파 및 친환경 제품 인증, 내구성 시험 위주이며, 센서 신뢰성 검증 및 측정 데이터에 대한 검증은 형식 승인 및 등록, 인수시험, 초기교정, 주기시험 등을 통해 센서 성능평가 위주로 수행된다. 본 플랫폼은 각 타겟 센서별 성능평가 뿐만 아니라 센서의 데이터 신뢰성에 대한 검증체계 지원 ICT 기반 환경 모니터링 센서 신뢰성 검증 체계를 구축하였다. 환경 정보에 대한 센서 데이터를 수집할 센서보드를 제작하였고 센서 및 데이터 신뢰성 평가 및 검증 서비스 체계를 규격화 하였다. 또한, ICT 기반 센서 데이터 신뢰성 평가 및 검증을 위해 LoRa 통신을 이용한 센서 데이터 플랫폼 모니터링 프로토타입을 제작하였고 이를 스마트 시티 등에 실증 테스트하였다. 해당 시스템을 통해 받은 데이터 분석을 위해 머신러닝을 이용하여 최적화 알고리즘 개발하였다. 이를 통해 신뢰성 검증을 위한 센서 빅데이터 분석시스템을 구축하였고 통합 평가 및 검증 시스템의 기반을 마련하였다. Existing environmental measuring devices mainly focus on electromagnetic wave and eco-friendly product certification and durability test, and sensor reliability verification and verification of measurement data are conducted mainly through sensor performance evaluation through type approval and registration, acceptance test, initial calibration, and periodic test. This platform has established an ICT-based environmental monitoring sensor reliability verification system that supports not only performance evaluation for each target sensor, but also a verification system for sensor data reliability. A sensor board to collect sensor data for environmental information was produced, and a sensor and data reliability evaluation and verification service system was standardized. In addition, to evaluate and verify the reliability of sensor data based on ICT, a sensor data platform monitoring prototype using LoRa communication was produced, and the test was conducted in smart cities. To analyze the data received through the system, an optimization algorithm was developed using machine learning. Through this, a sensor big data analysis system is established for reliability verification, and the foundation for an integrated evaluation and verification system is provide.

화면 인식 기반 AR 대학 시설 안내 시스템 개발

이재익(Jae-ik LEE),이정현(Jeong-hyun Lee),정현승(Hyun-seung Jeong),박연규(Yeon-kyu Park),조재혁(Jae-hyuk Cho),유철중(Cheol-jung Yoo) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.6

ICT 기반 환경 모니터링 센서 데이터의 신뢰성 검증을 위한 플랫폼

채민아(Minah Chae),조재혁(Jae Hyuk Cho) ICT플랫폼학회 2021 JOURNAL OF PLATFORM TECHNOLOGY Vol.9 No.1

등속성 운동이 노인 여성의 하지근력에 미치는 영향

조재혁,이승훈 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

The purpose of this study is to find whether isokinetic training has a good effect on decrease of the lower limbs muscular strngth caused by aging and find the isokinetic training Speed which has a good effect on muscular strength. The subjects of this study are 16 elderly women aged from 61 to 65. The subjects were distributed into two groups, low-speed isokinetic training program group(n=8) arid high-speed isokinetic training program group(n=8) respectively. The subjects of two groups participated in lower extremities isokinetic training program three times a week for 12 weeks. Changes of the lower limbs muscular strength after training were analyzed through repeated measures anova. Results of this study are following: 1. Change of knee extension isokinetic peak torque at the 60˚/ sec in the LS group after 12 week training was significantly different form HS groups. There was no significant difference in knee flexion peak torque among groups. 2. Change of knee extension isokinetic peak torque at the 180˚/sec in the HS group after week training was significantly different form LS groups. There was no significant difference in knee flexion peak torque among groups.

12주간의 등속성 운동이 노인 여성의 낙상관련 변인에 미치는 영향

조재혁,이승훈 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

The purpose of this study is to find whether isokinetic training has a good effect on decrease of falling fitness factors caused by aging and find the training program which has a good effect on physical factors. The subjects of this study are 15 elderly women aged from 61 to 65. The subjects were distributed into two groups, low-speed isokinetic training program group(n=8) and high-speed isokinetic training program group(n=7) respectively. The subjects of isokinetic training group participated in lower extremities isokinetic training program three times a week for 12. weeks. Changes of falling fitness factors(power, agility, gait speed, and balance) after training were analyzed through repeated measures anova. Results of this study are following: 1. There was a significant difference in balance test after 12. week training between high-speed isokinetic training group and low-speed isokinetic training group. 2. There was no significant difference in power test after 12 week training between high-speed isokinetic training group and low-speed isokinetic training group. 3. There was no significant difference in agility test after 12. week training between high-speed isokinetic training group and low-speed isokinetic training group. 4. There was a significant difference in gait speed test after 12 week training between high-speed isokinetic training group and low-speed isokinetic training group.

ELASTIC BAND 운동과 스트레칭 운동이 노인 당뇨환자의 혈당, 중성지질 및 근지구력에 미치는 영향

조재혁,이승훈,진종현 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

The purpose of this study s to find the effects of elastic band exercise and stretching exercise on glucose level, triglyceride and muscle endurance in elderly patient with NDDM. The subjects consisted of elderly patient(n=20) with NlDDM dstributed into resstance training group(n=10) and stretching exercise group(n=10). Both groups participated in resstance training and stretching exercise program respectively, 3times per wear during 9weeks. Repeated measures ANOVA was used for statstical analysis. The results of this study are following. 1. Glucose level of both groups decreased significantly after 9 weeks training. There was significant differences between groups in FBS and no significant differences between groups in PP2 after training. There was significant differences in PP2 at time and no significant differences in FBS at times. 2. There was significant decreases in triglyceride level of both groups after 9 weeks training, however no significant differences showed between goups. There was no significant differences between groups at time. 3. Muscle endurance of both groups increased after 9weeks training, however no significant differences showed between groups. There was no significant differences between groups at time.

12주간의 등속성 및 스트레칭 운동이 노인 여성의 체력요인에 미치는 영향

임순길,조재혁 龍仁大學校 體育科學硏究所 2003 體育科學硏究論叢 Vol.13 No.2

The purpose of this study is to find whether isokinetic training and stretching program has a good effect on decrease of physical factors caused by aging and find the training program which has a good effect on physical factors. The subjects of this study are 15 elderly women aged from 61 to 65. The subjects were distributed into two groups, isokinetic training program group(n=8) and stretching group(n=7) respectively. The subjects of isokinetic training group participated in lower extremities isokinetic training program three times a week for 12 weeks, and the subjects of stretching group participated in stretching program three times a week for 12 weeks. Changes of physical factors(power, agility, gait speed, and balance) after training were analyzed through repeated measures anova. Results of this study are following: 1. There was a significant difference in balance test after 12 week training between stretching group and isokinetic group. 2. There was a significant difference in power test after 12 week training between isokinetic group and stretching group. 3. There was a significant difference in agility test after 12 week training between isokinetic group and stretching group. 4. There was a significant difference in gait speed test after 12 week training between stretching group and isokinetic group.