감성 조명장치의 소모 전력 절감을 위한 거리 측정 센서 기반 자동 조광 제어

신성훈,지상훈,정구민,이영대,배성한,Shin, Sung-Hun,Ji, Sang-Hoon,Jeong, Gu-Min,Lee, Young-Dae,Bae, Sung-Han 한국인터넷방송통신학회 2011 한국인터넷방송통신학회 논문지 Vol.11 No.6

본 논문에서는 감성조명의 소모전력 절감을 위한 거리 측정 센서 기반 자동 조광 제어 시스템을 제안하고 구현한다. 지속적인 색상변화를 표현해야 하는 감성 조명에서의 소비 전력 절감을 위하여 초음파 센서를 이용한 사용자와의 지속적인 거리 측정 및 이를 통한 PWM Dimming 제어를 수행한다. 조명장치는 마이크로 컨트롤러, LED Driver, 초음파 센서, 통신모듈 등으로 구성되며, 초음파 센서를 통해 측정된 거리 정보를 PWM 신호에 적용하여 실시간 밝기 제어를 수행한다. 기존 조명에서의 에너지 절감 기법을 감성조명에 적용하여 사용자 부재 시 불필요한 전력 소모를 최소화하는 능동형 조명 시스템을 구현한다. In this paper, we propose and implement the automated brightness control system using distance measuring sensor for reducing the power consumption of emotional lighting device. In order to reduce the power consumption of emotional lighting devices which express continuous color changes, the proposed device measures the distance continuously using ultrasonic sensor and by using this, it also performs PWM Dimming control. The lighting device is composed of micro controller, LED driver, ultrasonic sensor, communication module and so on. And the device performs the real time brightness control by adapting the measured distance information from ultrasonic sensor to PWM signals. From this experiment, we implement the active lighting system which minimizes unnecessary power consumption during user's absence by adapting existing energy reducing techniques.

발걸음 위치 가변성을 활용한 연령별 보행패턴분석

신성훈(Shin, Sung-Hoon) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.1

The aim of the study was to propose a practical metric which can quantify the footfall placement variability(FPV). The COP data were collected using a 4 m electronic walkway(GAITRite). The coordinate of COP data was fit with Fourier series. The average values of FPV were compared through one way ANOVA for four age groups. The average values of Functional Ambulation Profile score(FAP) were also compared among 4 groups. The proposed parameters also estimated a linear regression equation between the age and FPV. The partial correlation measures the degree of association between age and FPV with the effect of a set of controlling gait speed. Overall, there is a tendency that older adults had greater spatial variability than younger adults. Partial correlation was stronger between age and FPV than between age and FAP. Especially, the FPV was dramatically increased in people approaching the age of 60(p<.001). This finding highlights that footfall place variability could be not only be convenient enough but also evaluate the decline of gait function which caused by aging. Future works determining the sensitivity of footfall placement variability to dysfunctionality from various movement disorder are warranted.

페록손공정에서 수온변화 및 NaOH 주입에 따른 지오스민 및 2-MIB 제거특성 연구

신성훈 ( Sung-hoon Shin ),조용철 ( Yong-chul Cho ),정종태 ( Jong-tai Jung ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.6

We examined the removal efficiency of Geosmin and 2-MIB by Peroxone Process according to water temperature and NaOH concentration. It was found that under the same condition of water temperature, injection of O₃ and H₂O₂ was higher efficient rather than injection of only O₃. In addition, It was also found that as mole ratio of H₂O₂/O₃ was getting higher, the removal efficiency was getting higher overall. But having to compare with 5℃ and 15℃ temperature, it was evident that the initial reaction rate was much slower at low temperature 5℃ with much lower efficiency. Based on a 7min(contact time) under 5℃, Geosmin and 2-MIB showed a mole ratio of 1.0 while showing a staggering 50% removal rate from 0.75 mole ratio under 15℃. For well-over 15 minutes, the removal rate went down from 50% to 27% and 20% in Geosmin and 2-MIB, respectively. As NaOH was injected to ramp up efficiency under low temperature, the processing efficiency for Geosmin and 2-MIB went up significantly. It is apparent that the efficiency was more pronounced when handled under increased NaOH injections in 5℃ than in 15℃. This directly translates into a conclusion that processing via NaOH was more efficient under low temperature 5℃ than 15℃. As in the case for pH, it was found that akaline substance reacted faster than acidic/neutral ones whereas the pace was far slower in pH 11 including not only reaction time but also processing efficiency.

9세 아동의 보행 가변성 연구

신성훈(Shin, Sung-Hoon),이윤곤(Lee, Yun-Gon),정철민(Chung, Chul-Min) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.3

The purpose of this study is to determine how the control of covariates (height, weight, and walking speed) affects the changes in gait performance and gait variability in walking of 9-year-old children and young adults in their 20s. It is to understand how age affects actual gait performance and variability regardless of physical condition. Thirteen male 9-year-old children (9.43±0.19) and 13 young adults (21.69±1.60) living in the community, a total of 26 participants participated in this study. Participants wore 7D IMU sensors on both feet and walked for 6 minutes. From the data measured through the 6-minute walk, the gait performance variables was calculated as the average value of measured gait parameters. Gait variability was calculated by defining CV values of the measured gait parameters. As a result of performing ANCOVA controlled by a covariate in the gait performance comparison, there was no difference in performance between children and young adults, and there was a difference in gait variability in gait cycles (s), cadence (step/min), and stride length (m). This shows that children"s gait shows high variability due to lack of physical condition and gait speed as well as muscle strength and muscle nerve control ability compared to adults, and that gait regulation process is highly likely to be incomplete. This conclusion suggests that gait variability should be a factor in determining effective gait characteristics in children"s gait studies.

기저면의 크기 변화가 직립 자세제어의 가변성과 복잡성에 미치는 영향

신성훈(Shin, Sung-Hoon),장대근(Jang, Dae-Geun) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.1

The aim of the study was to investigate the effect of base of support on standing postural control. In this study, we measured 24 persons’ COP signals from 20% to 100% base of support. For the variability measures, mean velocity(MV), root mean square(RMS), sway path(SP), 95% ellipse area were measured for each direction and radial movement. For the frequency domain parameters four well-known quantitative parameters were used: the median frequency, 50, 80, and 90 percentile power spectrum density. As nonlinear dynamic measures, approximate entropy(ApEn), sample entropy(SampEn) and detrended fluctuation analysis(DFA) α. The results showed that only variability measures linearly and significantly increased as base of support decreased (p<.001). However, frequency domain parameters and nonlinear measures drastically change only when base of support reduced up to 20%. Results implied that even though base of support reduced, it did not directly change the postural control strategy. There are some thresholds to change the control process. Therefore, we conclude that persons’s postural control system compensate the reduced the base of support. It is effective until 20-40%.

Biofilter 공정에서 염분 농도 조건에 따른 탈질반응 변화 연구

신성훈 ( Sung Hoon Shin ),이성재 ( Sung Jae Lee ),오재일 ( Je Ill Oh ) 한국물환경학회 2008 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2008 No.-

하지압박에 의한 혈류제한이 정적 자세제어에 미치는 영향

신성훈(Shin, Sung-Hoon),김규승(Kim, Kyu-Seung) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.2

The purpose of this study is to investigate the acute effects of the blood flow restriction and task constraints to the postural control during quiet standin tasks. Total 18 male athletes participated in this study. All participants underwent postural control assessment, which consisted of participants standing on an AMTI force platform with shoulder width apart for four thirty second trials, 1) with eyes open without mat, 2) with eyes closed without mat 3) with eyes open with mat 4) with eyes closed with mat. They also conducted a single leg standing. Participants stood barefoot with their arms placed comfortably by their sides. Maximal distance, mean sway velocity, mean frequency, 95% power frequency, sample entropy, fractal dimension were calculated to examine the postural sway. Overall results demonstrated that blood flow restriction made a greater maximal distance and a faster mean velocity in ML direction than controls but not all conditions. Also, blood flow restriction made a changes in postural dynamics with a larger sample entropy in AP direction movment and a smaller sample entropy in ML direction sway. This finding implied that the blood flow restriction leads changes in the postural dynamics temporarily. However change of dynamic structure depends not only on blood flow restriction but also on the task constraints.

HDMI 멀티패스 기능을 지원하는 무선 HD급 고화질 영상 전송 시스템

신성훈(Sung-Hoon Shin),이효욱(Hyo-Uk Lee),김원(Won Kim) 한국정보기술학회 2013 Proceedings of KIIT Conference Vol.2013 No.5

본 연구는 다수의 영상 소스기기로부터 영상을 전송 받아 무선 영상 수신 장치에 전송 할 수 있도록 하는 HDMI 멀티 패스((Multi-path)를 지원하는 60㎓ 주파수 대역의 무선 영상 전송 시스템에 관한 것이다. HDMI 멀티 패스를 지원하는 60㎓ 주파수 대역의 무선 영상 전송 시스템은 60㎓ 주파수 대역을 이용하여 영상 데이터를 3Gbps의 속도로 무선 송출한다. 다수의 영상 소스기기와 각각 연결된 HDMI 포트중 어느 하나의 HDMI 포트와 연결된 영상 소스기기를 선택하여 통신을 설정한다, 또한, 통신이 설정된 영상 소스기기로부터 전송되는 영상 데이터를 6㎓ 주파수 대역의 무선 데이터로 변환하여 무선 송출하도록 함으로써, 영상 소스기기가 변경되어도 HDMI 케이블을 교체하여야 하는 불편함을 해소할 수 있게 된다. This study is about video transmission in 60㎓ interface of supporting HDMI multi-path which is transmitting from multiple video source devices to wireless video receiver. Wireless transmission system transmits video data at 3Gbps using 60㎓ frequency. It picks video source device connected to HDMI port to set up communication. It solves the inconvenience that might be occurred replace of HDMI cable by converting data to 60㎓ wireless data and transmitting from previously set video device.

RFID 안테나 최적 배치를 위한 알고리즘

신성훈(Sung-Hoon Shin),유연희(Yeon-Hee Yu),김원(Won Kim) 한국정보기술학회 2013 Proceedings of KIIT Conference Vol.2013 No.5

수온 및 NaOH 농도변화에 따른 Peroxone/GAC 복합공정에서 지오스민 및 2-MIB 제거특성 연구

신성훈 ( Sung-hoon Shin ),정종태 ( Jong-tai Jung ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.5

Due to the rapid changes in the environment by climate change, algae in water supply becomes unpredictable so that there are concerns and worries about the occurrence of taste and order problems in tap water and in the recent winter, concentration of Geosmin was unusually detected up to 1,640 ng/L in Bukhan River. The treatment with Peroxone+GAC(granular activated carbon) process was implemented to reliably remove Geosmin and 2-MIB in a low temperature and a high concentration in this study and the result showed that the treatment efficiency of 2-MIB was observed relatively lower than Geosmin in terms of all ozone injection concentrations and H₂O₂/O₃ molar ratio in a low temperature condition, 5 ℃ and a high temperature condition, 25 ℃. In the GAC process, more than 99% of 2-MIB and Geosmin were removed under the condition of 25 ℃ which is a high water temperature and in case of the water temperature 5 ℃, both 2-MIB and Geosmin in the processed water were removed below the reference value of 20 ng/L. In the Peroxone process, the treatment of Geosmin and 2-MIB in a low temperature was very easy to process. In addition, overall, when the inflow concentration of Geosmin and 2-MIB increases, treatment efficiency showed a tendency to decrease. After adding NaOH, the treatment efficiency was very good in the GAC process which is a post-process and when a higher concentration of NaOH is applied, the treatment of residual ozone was decreased at both 5 ℃ and 15 ℃ of water temperatures.