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        • KCI등재

          스마트폰 앱 기반의 물 사용량을 활용한 실시간 독거노인 관리 시스템 개발

          유재현(Jae-Hyun Yoo),김계현(Kye-Hyun Kim),박용길(Yong-Gil Park),염경택(Kyung-Taek Yum) 한국디지털콘텐츠학회 2020 한국디지털콘텐츠학회논문지 Vol.21 No.6

          고령인구의 급격한 증가로 인한 복지 문제는 사회적인 문제로 부각되고 있고, 이를 관리하기 위한 콘텐츠는 증가하고 있다. 또한 수자원 기술과 ICT 기술 용합은 실시간 물 사용량 정보를 사용자가 제공받을 수 있는 환경이 조성되었다. 물 정보는 일상생활에 필수 요소로써, 이를 통해 독거노인 실시간 모니터링과 위험상황 관리 등 복지서비스를 지원할 수 있다. 따라서 본 연구에서는 스마트폰 앱 기반의 물 사용량을 활용하여 실시간으로 독거노인을 모니터링하고 관리할 수 있는 시스템을 개발하였다. 시스템은 물정보의 실시간 현황 및 통계 정보를 제공하며, 독거노인의 물 사용량 실시간 모니터링을 통해 사용량 변화 감지 시 대처가 가능하도록 하였다. 이러한 시스템을 이용하여 사용자에게 제공된 물 정보는 국민의 알권리를 충족시키고 물의 중요성에 대한 인식 제고 및 나아가 물 절약에도 기여할 수 있다. 나아가 독거노인을 체계적으로 관리함으로써 복지 사회의 구현에 보다 많은 기여를 할 것으로 사료된다. The issue of welfare that results from the rapid increase in aging population is emerging as a social problem and there is an increase in the amount of contents that are being developed to manage this matter. Additionally, the fusion between water resource technology and ICT technology shaped an environment so that real-time water use can be provided to the users. Information about water is an essential element in daily life, and through this, welfare service like monitoring the alone elderly and risk management can be provided. Therefore, this study developed a system with a smart phone application to provide water information by applying real-time amount of used water as well as management of the alone elderly. The system provides information about water and real-time status and statistics data about enabled coping measures during the outbreak of risks by monitoring the amount of water used by the alone elderly. The information about water provided to the users will satisfy the citizens right to know and also enhance awareness about water. Furthermore, it is anticipated for welfare service to improve further by managing the alone elderly.

        • KCI등재

          운동 전 흡연 유,무에 따른 %SO₂, 무산소성 역치 및 심폐운동능력의 비교연구

          유재현(Jae Hyun Yoo),지용석(Yong Suk Jee),김은경(Eun Kyung Kim) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.40

          Cigarette smoking is an important risk factor for cardiovascular disease, cancer, hypertension and premature mortality. The purpose of this study is to examine the responses of %SO2, anaerobic threshold & cardiorespiratory capacities during the exercise according to cigarette smoking and nonsmoking on smokers. The subjects of this research were 16 healthy men, subjects were randomly treat into two methodology; smoking treatment and non-smoking treatment at interval of one week. The statistical analysis indicated that non-smoking treatment had significantly higher at the %SO2(97.81 vs 94.25), Maximal oxygen consumption(56.25±6.27㎖/kg/min vs. 53.20±5.87㎖/kg/min), anaerobic threshold(30.60±4.08㎖/kg/min vs. 28.15±3.62㎖/kg/min) and exercise duration time(836.69±73.97sec vs. 804.13±84.85sec) compare to smoking treatment. The results suggest that the acute cigarette smoking before exercising contribute negative effects on pulmonary function, aerobic power and peripheral blood flow. In conclusion, the cigarette smoking before exercising decrease approximately 1MET in maximum oxygen consumption.

        • KCI등재

          비만 여성의 β-3 AR 유전자 다형성에 따른 신체적 특성, 혈중지질과 체력 요소들 간의 비교분석

          유재현(Jae Hyun Yoo),이삼준(Sam Joon Lee),이재구(Jae Koo Lee) 한국사회체육학회 2007 한국사회체육학회지 Vol.0 No.31

          β-3 adrenergic system plays a key role in regulating energy balance through the stimulation of both thermogenesis and lipid mobilization in brown and white adipose tissues in human. This study was conducted to examine the difference on physical characteristics, blood lipid, and health-related physical fitness by β-3 adrenergic receptor polymorphism. The subjects were 26 middle-aged women, and were divided into two groups as mutant group;β3-adrenergic receptor gene(n=13) and normal group;homozygotes(n=13). There were not significant differences on physical characteristics, blood lipid and health related physical fitness between mutation group and normal group. These results suggest that presence of the polymorphism alone does not significantly increase the risk of cardiovascular disease.

        • KCI등재후보

          일회적 운동과 식욕

          유재현(Jae-Hyun Yoo),이삼준(Sam-Jun Lee),김은경(Eun-Kyung Kim) 한국코칭능력개발원 2005 코칭능력개발지 Vol.7 No.3

          비만은 생활습관질환에 있어 통제 가능한 요인이다. 따라서 에너지 소비와 대사 그리고 식욕의 조절에 대한 기전을 이해하는 것은 비만연구에 있어 중요하다. 비만은 일반적으로 신체활동의 감소와 식욕조절 능력의 상실과 연관이 있는 것으로 보고되고 있다. 렙틴은 음식섭취과 체중을 조절하는 호르몬으로 에너지 발란스에 관한 정보를 시상하부로 전달하는 역할을 한다. 본 연구는 일회적 운동의 운동강도, 운동시간, 운동량에 따라 발현되는 식욕관련 호르몬인 렙틴의 농도를 고찰하는데 목적이 있으며, 이는 비만관리 현장 지도자들에게 적절한 정보를 제공할 수 있을 것으로 판단한다. 일회적 운동에 의한 렙틴의 농도는 일반적으로 감소하는 것으로 나타났다. 이는 운동강도, 운동시간, 운동량 등에 따라 손실된 에너지를 보충하기 위한 방법이며, 또한 운동 중 발생한 혈장량 감소에 따른 혈액농축에 의한 결과로도 보여진다. Understanding the regulation of appetite and the control of energy expenditure and metabolism is becoming increasingly important in obesity research. Obesity is typically associated with weak appetite control and reduced levels of physical activity. Leptin is a hormone that regulates food intake and body weight. This circulating hormone acts as a peripheral feedback signal informing the hypothalamus concerning energy balance. The purpose of this study was to review the leptin response according to the intensity, time and volume of acute exercise. Leptin concentrations experience a reduction in the systemic circulation after acute exercise. This decline is likely associated with the disruption in metabolic homeostasis created by the high-intensity, long-duration and energy expenditure.

        • KCI등재

          GIS 기반 불투수율 산정방법론을 활용한 강우유출수 부담금 모의산정 방안 연구

          유재현 ( Jae Hyun Yoo ),김계현 ( Kye Hyun Kim ),최지용 ( Ji Yong Choi ),이철용 ( Chol Young Lee ) 한국물환경학회(구 한국수질보전학회) 2021 한국물환경학회지 Vol.37 No.3

          Korea needs to develop a rational system to separate stormwater utility fee from current sewerage fee. In this study, the scenario for calculating stormwater utility fee of Bupyeong-gu was suggested and the results were considered. For this purpose, the application of stormwater utility fee overseas and current domestic system were analyzed. A three step calculating scenario considering suitable domestic situation and impervious surface area was suggested. Water, sewerage usage, and hydrant data were collected. The total amount of water and sewerage fees for land use were calculated. The sewerage fee of Bupyeong-gu for the year 2014 was 21,685,446,578 won. Assuming that 40% of this amount was the cost associated to stormwater, the result showed that the fees for residential area in third step decreased by 0.77% compared to that of the first step. For commercial area, the stormwater utility fee decreased by 36.87%. For industrial area, although the consumption of water was similar to that of commercial area, the stormwater utility fee increased by 8.35%. For green area, the fee increased by 37.46%. This study demonstrated that the calculation of actual stormwater utility fee using impervious surface map and impervious Surface Ratio Estimation Methodology developed in previous studies is feasible.

        • KCI등재

          가우시안 프로세스 기반의 원거리 통신지연 보상기법을 이용한 무인기 경로계획

          유재현(Jae Hyun Yoo) 제어로봇시스템학회 2018 제어·로봇·시스템학회 논문지 Vol.24 No.12

          This paper studies a path planning for a UAV (Unmanned Aerial Vehicle) that is experiencing network communication delay between the UAV and a control station. When random time-delay occurs in the communication link, a machine learning technique can deal with nonlinearities and uncertainties of the delay by estimation of UAV’s state. As a machine learning technique, this paper applies GP (Gaussian Process), which has advantage of the flexibility in modelling complex expressions using a small number of learning parameters. Despite GP’s popularity to the robotic applications, it has not been reported in learning random delay properties for real UAV flight. We apply GP learning in the path planning framework based on MPC (Model Predictive Control) method. The proposed method is evaluated on a trajectory tracking of a UAV, where we set the delay on the communication link. The experimental results show the improved tracking performance.

        • KCI등재

          굴곡 융착면을 이용한 고밀도폴리에틸렌 관의 버트 융착 공정에서의 열유체 거동 수치모사

          유재현 ( Jae Hyun Yoo ),최선웅 ( Sunwoong Choi ),안경현 ( Kyung Hyun Ahn ),오주석 ( Ju Seok Oh ) 한국화학공학회 2017 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.55 No.4

          폴리머 재질의 관을 융착 시키기 위해서는 버트 융착 공정을 거치는데, 최근 융착면에 굴곡을 주어 융착 강도를 높이고자 하는 시도가 있었다. 본 연구에서는 융착면의 굴곡이 폴리머의 열유체 거동 및 융착 강도에 어떠한 영향을 미칠 것인지 2차원 축대칭 평면에서 유한요소법을 사용하여 살펴보았으며, 고밀도폴리에틸렌 관을 대상으로 하였다. 열유화 단계에서 융착면의 형상을 따라 굴곡진 상경계면이 나타남을 확인할 수 있었다. 접합 단계에서는 굴곡진 상경계면과 융착면 사이에서의 멜트의 압착 흐름이 나타남을 확인할 수 있었으며, 굴곡융착부의 낮은 전단율은 관의 축과 수직 방향 배향을 완화시켜 융착부 강도 향상에 도움을 줄 수 있을 것으로 예상된다. Butt-fusion welding process is used to join the polymeric pipes. Recently, some researchers suggest the curved surface to enhance a welding quality. We investigated how curved welding surface affects heat and flow behaviors of polymer melt during the process in 2D axisymmetric domain with finite element method, and discussed the effect to the welding quality. In this study, we considered HDPE pipes. In heat soak stage, curved phase interface between the melt and solid is shown along the shape of welding surface. In jointing stage, squeezing flow is generated between curved welding surface and phase interface. The low shear rate in fusion domain reduces the alignment of polymer to the perpendicular direction of pipes, and then this phenomenon is expected to help to enhance the welding quality.

        • KCI등재

          슬관절의 등장성 최대근력 간접측정치와 등속성 최대회전력간의 비교분석

          유재현(Jae Hyun Yoo) 한국사회체육학회 2004 한국사회체육학회지 Vol.0 No.21

          The purpose of this study was to compare the maximum strengths, the flexor and extensor ratios, and left and right differences between the indirect isotonic maximum strength(1RM) and the isokinetic peak torque at knee joint. The subjects of the experiment were consisted of early 21 male university students in Seoul Korea without disabilities. The average age of subjects was 21.95 with ±3.38 deviations. The results of this study were shown as followed; The correlation of extensor between test machines showed r=.717(p<.001) on left, and r=.588(p<.01) on right. Flexor showed r=.807(p<.001) on left, and r=.706(p<.001) on right. The significance statistically showed high correlations between isotonic one repetition maximum and isokinetic peak torque. The deviations of strengths between left and right muscles were not significantly different on both test machines. The differences between flexor and extensor ratios were not significantly different on both test machines. The results of these data suggests that indirect 1RM of isotonic test was predicted factors of isokinetic peak torque. Thus, we hope the field exercise specialists to reference for management of exercise participants.

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