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Dental Treatment of Shell Teeth Associated with Osteogenesis Imperfecta: a Case Report
Hanbyeol Kim,Hyuntae Kim,Ji-Soo Song,Teo Jeon Shin,Hong-Keun Hyun,Young-Jae Kim,Jung-Wook Kim,Ki-Taeg Jang Asia Association for Disability and Oral Health 2023 International Journal of Disability and Oral Healt Vol.19 No.1
스마트팜 환경데이터 기반 파프리카 생육 예측 모델 연구
오한별(HanByeol Oh),장경민(KyeongMin Jang),임종현(Jonghyun Lim),이명배(MyeongBae Lee),신창선(ChangSun Shin) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2
농업 현장에 적용된 IoT(Internet of Things) 및 통신 시스템 기술은 첨단 농업인 스마트팜으로의 발전을 견인하고 있다. 특히 농업에서 차지하는 비중이 큰 파프리카와 같은 원예작물의 생산성을 향상시키고 생육비용을 줄일 수 있는 데이터 기반의 생육모델 개발 요구가 증가되고 있다. 따라서 본 연구에서는 스마트팜 환경 및 생육 데이터를 활용하여 파프리카의 생육 예측모델을 연구하고자 한다. 스마트팜에서 수집된 환경 및 생육데이터를 전처리하고, 데이터 병합을 진행한다. 이러한 전처리 과정 이후 다중선형회귀(Multiple Linear regression)를 통해 엽장과 엽폭을 분석하여 생육 예측 모델을 제시한다. 분석된 결과값을 활용하면 스마트팜 시스템 환경 운영 및 작물 최적 생육에 필요한 온실 환경제어 시스템의 개선을 기대할 수 있다.
HEV의 회생제동 성능 향상을 위한 브레이크 제어알고리즘 개발
진한별(Hanbyeol Jin),허지욱(Jeewook Huh),신재현(Jaihun Shin),황성호(Sungho Hwang) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Regenerative braking is a core technology to reduce the fuel consumption in HEV. Accordingly, proper optimized control strategy is needed to maximize the efficiency of regenerative braking and ensure the stability of motor and battery. In this paper, Brake Control Logic was modeled to ensure the stability and maximum performance of regenerative braking by MA TLAB/Simulink. Brake Control Logic takes charge of distribution of braking force, regenerative braking, limited regenerative braking when driver pressed brake pedal. Brake Control Logic plays the role of control unit to improve stability, fuel consumption and performance of vehicle.
Sensorless Force Control Algorithm based on Momentum Observer Technique
Youngjun Joo,Hanbyeol Kim,Jonghun Park,Changeui Shin,Hoseong Kwak,Joonkeol Song,Chulho Shin 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
This paper presents a sensorless force control algorithm based on external force estimation technique for robotic manipulator systems. Typically, six-axis force torque or joint torque sensors are employed to measure external force induced by contact between the robot and the environment. However, attachment of such sensors to robotic manipulator systems is too costly and requires additional space in the body of a robotic manipulator. Our choice for solving this problem is to employ the momentum observer, which is one of the well-known external force estimation techniques for estimating external force, and the estimated external force is used as feedback for force control without using costly force torque or joint torque sensors. Stability of a closed-loop system where contact is in place and force control performance in such conditions have been analyzed based on the singular perturbation theory. In addition, a design guideline for applying the momentum observer approach we proposed has been put together according to the Lyapunov analysis method. We validate performance of the proposed algorithm using experiments with a six-axis industrial robotic manipulator (Robostar RA004). The experimental results show that the end-effector of the manipulator exerts desired force to contact object with error margin of 3:6%.
Lee, Kyubae,Shin, Hanbyeol,Gupta, Kailash Chandra,Lee, Dong Yun,Park, Soo-Young,Kang, Inn-Kyu IEEE 2018 IEEE SENSORS JOURNAL Vol.18 No.20
<P>The 4-cyano- <TEX>$4^{\prime }$</TEX> -pentyl biphenyl (5CB) liquid crystals molecules are fascinating materials for the fabrication of sensors as they are able to show a detectable optical signal in presence of small variation in surface forces. The sensitivity of 5CB molecules increased further on using them as microdroplets emulsion as compared to layered structures on plannar solid surfaces. The anchoring of receptor (AIgG) on LC microdroplets makes microdroplets capable to produce species specific optical signal in presence of nonspecific interactions. Gold nanoparticles (GNPs) have increased the interactions of antigen (IgG) with LC microdroplets anchored AIgG. The concomitant emission of calcein green fluorescence on interactions of GNPs anchored esterase with LC microdroplet anchored calcein-AM has provided an evidence to confirm the interactions induced transition from radial to bipolar in LC microdroplets. The AIgG ( <TEX>$4.2~\mu \text{g}$</TEX>, 28 pmol) and calcein-AM ( <TEX>$4.8~\mu \text{g}$</TEX>, 4.55 nmol) anchored LC microdroplets within a size variation of 20- <TEX>$30~\mu \text{m}$</TEX> have shown a lower limit of detection of 0.22 ± 0.001 pmol of IgG in PBS (pH 7.4) within a contact time of 20 minutes. Thus, liquid crystals microdroplets have sufficient scope to develop biosensors for <I>in vitro</I> detection of disease causing antigens in biological fluids.</P>