Search Results - "Jang, Gunhee"

Real-Time Detection of the Dynamic Eccentricity in Permanent-Magnet Synchronous Motors by Monitoring Speed and Back EMF Induced in an Additional Winding by Kang, Kyungjin, Song, Jeongyong, Kang, Chiho, Sung, Sangjin, Jang, Gunhee

“…We developed a real-time method to detect the dynamic eccentricity of a rotor in a permanent-magnet (PM) motor by monitoring a fault detection signal induced…”
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Magnetic Helical Robot for Targeted Drug-Delivery in Tubular Environments by Nam, Jaekwang, Lee, Wonseo, Kim, Jongyul, Jang, Gunhee

“…We propose a novel magnetic helical robot (HR) that can helically navigate, release a drug to a target area, and generate a mechanical drilling motion to…”
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Effective Locomotion and Precise Unclogging Motion of an Untethered Flexible-Legged Magnetic Robot for Vascular Diseases by Lee, Wonseo, Nam, Jaekwang, Kim, Jongyul, Jung, Eunsoo, Jang, Gunhee

“…We propose an untethered flexible-legged magnetic robot (FLMR) manipulated by an external rotating magnetic field (ERMF) to generate effective locomotion and…”
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Magnetic Navigation System Utilizing Resonant Effect to Enhance Magnetic Field Applied to Magnetic Robots by Nam, Jaekwang, Lee, Wonseo, Jang, Bongjun, Jang, Gunhee

“…We propose a novel magnetic navigation system (MNS) with the resonant effect of an RLC circuit to generate large magnetic field in high frequency. The variable…”
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Selective Motion Control of a Crawling Magnetic Robot System for Wireless Self-Expandable Stent Delivery in Narrowed Tubular Environments by Lee, Wonseo, Nam, Jaekwang, Jang, Bongjun, Jang, Gunhee

“…A novel crawling magnetic robot system manipulated by a magnetic navigation system is proposed for wireless self-expandable stent delivery in narrowed tubular…”
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Optimal Motion Control of a Capsule Endoscope in the Stomach Utilizing a Magnetic Navigation System with Dual Permanent Magnets by Bae, Suhong, Kwon, Junhyoung, Kim, Jongyul, Jang, Gunhee

“…We propose a method to control the motion of a capsule endoscope (CE) in the stomach utilizing either a single external permanent magnet (EPM) or dual EPMs to…”
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A Crawling Magnetic Robot Actuated and Steered via Oscillatory Rotating External Magnetic Fields in Tubular Environments by Jang, Bongjun, Nam, Jaekwang, Lee, Wonseo, Jang, Gunhee

“…We propose a novel crawling magnetic robot and a driving method utilizing an oscillatory rotating external magnetic field. The crawling magnetic robot is…”
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Resonant Piezoelectric Vibrator With High Displacement at Haptic Frequency for Smart Devices by Nam, Jahyun, Kim, Youngjin, Jang, Gunhee

“…Piezoelectric actuators have been spotlighted as a promising candidate for vibration motors, but their application is limited due to their inherent low output…”
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Identification of the Position of a Tethered Delivery Catheter to Retrieve an Untethered Magnetic Robot in a Vascular Environment by Lee, Serim, Kim, Nahyun, Kwon, Junhyoung, Jang, Gunhee

“…In this paper, we propose a method of identifying the position of a tethered delivery catheter in a vascular environment, recombining an untethered magnetic…”
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Selective Navigating and Unclogging Motions of an Intravascular Helical Magnetic Millirobot Actuated by External Biaxial Rotating Magnetic Fields by Jeon, Seungmun, Nam, Jaekwang, Lee, Wonseo, Jang, Gunhee

“…Intravascular helical magnetic millirobots (IHMMs) capable of navigating in and unclogging human blood vessels have been widely investigated as a possible…”
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Externally Leveraged Resonant Piezoelectric Actuator With Fast Response Time for Smart Devices by Nam, Jahyun, Oh, Hwayoung, Jang, Gunhee

“…An externally leveraged circular resonant piezoelectric actuator with haptic natural frequency and fast response time was developed within the volume of 10 mm…”
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Effect of Laminar, Turbulent and Slip Conditions on the Dynamic Coefficients of a Dry Gas Seal by Park, Youngjun, Hahn, Mibbeum, Jang, Gunhee

“…The dynamic coefficients of a dry gas seal affect the dynamic characteristics of rotor-seal systems. Fluid films in a dry gas seal can be laminar, turbulent or…”
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Base Station Switching and Sleep Mode Optimization With LSTM-Based User Prediction by Jang, Gunhee, Kim, Namkyu, Ha, Taeyun, Lee, Cheol, Cho, Sungrae

“…The base station (BS) switching technique has recently attracted considerable attention for reducing power consumption in wireless networks. In this paper, we…”
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Capsule-Type Magnetic Microrobot Actuated by an External Magnetic Field for Selective Drug Delivery in Human Blood Vessels by Choi, Kyun, Jang, Gunhee, Jeon, Seungmun, Nam, Jaekwang

“…In this paper, we propose a novel capsule-type magnetic microrobot (CMM) that can navigate along a tubular environment and selectively release drugs in…”
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Optimal Design and Experimental Verification of Ultrasonic Cutting Horn for Ceramic Composite Material by Hahn, Mibbeum, Cho, Yeungjung, Jang, Gunhee, Kim, Bumcho

“…We developed and optimized a block-type ultrasonic horn that can be used for cutting hard materials. The proposed block-type sonotrode consists of an aluminum…”
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Numerical Determination of the Frictional Coefficients of a Fluid Film Journal Bearing Considering the Elastohydrodynamic Lubrication and the Asperity Contact Force by Hong, Gwanghee, Kim, Kyobong, Park, Youngjun, Jang, Gunhee

“…This paper proposes a numerical method to investigate the frictional characteristics of a fluid film journal bearing considering the elastohydrodynamic…”
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Effects of Laminar, Turbulent, and Slip Conditions in a Fluid Film on a Dry Gas Seal by Hahn, Mibbeum, Park, Youngjun, Kang, Minsoo, Jun, Sanghyun, Jang, Gunhee

“…A dry gas seal is a mechanical seal that prevents leakage of gas from rotating machines utilizing gas as a medium. Fluid film in a dry gas seal can exhibit…”
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Thermo-Fluid–Structural Coupled Analysis of a Mechanical Seal in Extended Loss of AC Power of a Reactor Coolant Pump by Park, Youngjun, Hong, Gwanghee, Jun, Sanghyun, Choi, Jeongmook, Kim, Taegyu, Kang, Minsoo, Jang, Gunhee

“…We proposed a numerical method to investigate the thermo-fluid–structural coupled characteristics of a mechanical seal of a reactor coolant pump (RCP),…”
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Crawling Magnetic Robot to Perform a Biopsy in Tubular Environments by Controlling a Magnetic Field by Jung, Eunsoo, Nam, Jaekwang, Lee, Wonseo, Kim, Jongyul, Jang, Gunhee

“…We developed a crawling magnetic robot (CMR), which can stably navigate and perform biopsies remotely in tubular environments by controlling a magnetic field…”
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A Spiral Microrobot Performing Navigating Linear and Drilling Motions by Magnetic Gradient and Rotating Uniform Magnetic Field for Applications in Unclogging Blocked Human Blood Vessels by Jang, Gyu Bin, Jeon, Seungmun, Nam, Jaekwang, Lee, Wonseo, Jang, Gunhee

“…This research proposes a navigating and drilling spiral microrobot actuated by a magnetic gradient and rotating uniform magnetic field to unclog blocked human…”
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