A5101692046- Mechanical Engineering and Vibrations Research
- Gear and Bearing Dynamics Analysis
- Soil Mechanics and Vehicle Dynamics
- Engineering Applied Research
- Tribology and Lubrication Engineering
- Mechanical stress and fatigue analysis
- Hydraulic and Pneumatic Systems
- Agricultural Engineering and Mechanization
- Energy Harvesting in Wireless Networks
- Photopolymerization techniques and applications
- Wireless Power Transfer Systems
- Advanced DC-DC Converters
- Mechanical Failure Analysis and Simulation
- Advanced Polymer Synthesis and Characterization
- Advanced Memory and Neural Computing
- Vehicle Noise and Vibration Control
- Agriculture and Farm Safety
- Advanced machining processes and optimization
- Metallurgy and Material Forming
- Epoxy Resin Curing Processes
- Electric and Hybrid Vehicle Technologies
- Semiconductor materials and devices
- Vehicle Dynamics and Control Systems
- Innovative Energy Harvesting Technologies
- Ferroelectric and Negative Capacitance Devices
Seoul National University
2014-2025
Konkuk University
2024
Yonsei University
2002-2024
SK Group (South Korea)
2022-2024
Wonju Severance Christian Hospital
2024
Hanyang University
2022-2024
Hyundai Engineering (South Korea)
2024
Pohang University of Science and Technology
2017-2021
Korea Military Academy
2020-2021
Myongji University
2021
Abstract Neuromorphic and cognitive computing with a capability of analyzing complicated information is explored as new paradigm intelligent systems. An implementation renewable material an essential building block artificial synaptic device suggested flexible transparent based on collagen extracted from fish skin demonstrated. This exhibits behaviors including analog memory characteristics, excitatory postsynaptic current, paired‐pulse facilitation short‐term plasticity. The brain‐inspired...
The growing interest in bioinspired and sustainable electronics has induced research on biocompatible biodegradable materials. However, conventional electronic devices have been restricted due to their nonbiodegradable sometimes harmful toxic materials, which can even cause environmental issues. Here, we report a resistive switching random access memory (ReRAM) device based lignin, is waste product of the paper industry. active layer be easily formed using simple solution process plastic...
In this study, a method of predicting the seismic responses building structures based on convolutional neural network (CNN) is proposed. method, time histories acceleration previously measured in during earthquakes are used CNN input layer, with corresponding displacement being output layer. The correlations between features automatically extracted from by convolution and pooling operations various layers layer established through training. trained predicts for future earthquake event using...
Resistive switching memory that uses halide perovskites (HP) has been considered as next-generation storage devices due to low operation voltage and high on/off ratio. However, the still faces challenges for stable with fast speed, which hinders practical application. Thus, it should be from stage of designing HP applications. Here, we design perovskite using a high-throughput screening based on first-principles calculations. Total 696 compositions in four different crystal structures are...
This paper presents a retention/ pulse frequency modulation (PFM)/ width (PWM) mode dc–dc buck converter with adaptive zero current detector (AZCD) and spread spectrum clock generation (SSCG) for IoT/Wearable systems. The proposed is capable of handling loads from 10 μA to 20 mA high efficiency by applying triple (retention mode, PFM PWM mode), gate split technique, AZCD. Retention extend wide load range at ultralight load. Gate technique adjusts the conduction loss switching loss. AZCD...
This paper presents a full-CMOS wireless power receiving unit (WPRU) with high-efficiency 6.78-MHz active rectifier and dc-dc converter for magnetic-resonant alliance (A4WP) applications. The proposed delay-locked loop (DLL) is highly efficient receiver circuit intended use in resonant charging applications frequency of 6.78 MHz. Each MOSFET the turned on off based ac input voltage. delay between current voltage due to delays internal blocks such as limiter, level shifter, gate driver,...
In this paper, a high efficiency dc-dc buck converter with two-step digital pulse width modulation (DPWM) and low power self-tracking zero current detector (ST-ZCD) is proposed for Internet of Things (IoT) ultralow applications. The hybrid DPWM core linearity consumption to implement the converter. It composed delay control using counter line. An adaptive window analog reduce output voltage ripple within 20 mV. A dead time generator implemented ST-ZCD minimize reverse current. can improve by...
When designing helical gears, the goal is to optimize gear weight, efficiency, and noise while simultaneously achieving required strength. In this study, macro geometry of a pair was optimized for low high noise; further, trends optimal solutions five combinations three objectives were analyzed. The mass efficiency directly used as design objectives. However, since calculation generally very complicated time-consuming, has not been objective, peak-to-peak static transmission error (PPSTE),...
High-performance optoelectronic synaptic transistors are reported with a long-term memory by using organic–inorganic halide perovskites and oxide semiconductors.
This article introduces a 192-Gb 896-GB/s 12-high stacked third-generation high-bandwidth memory (HBM3 DRAM) with low power consumption and high-reliability traits. New design schemes features, including internal low-voltage signaling, center strobe calibration, through-silicon via (TSV) auto-calibration, symbol-correcting in-DRAM ECC, machine-learning-based layout optimization, allow large amounts of data transfers among the vertically base core dies limited delay mismatch or SI...
In this study, a semi-active suspension based on hydro-pneumatic mechanism was designed to minimize the ride vibration using control algorithm. The performance of algorithm critical for controlling characteristics target tractor. A linear-quadratic-Gaussian (LQG) optimal as plant model developing parameters an actual rear deflection represented by Kalman-filter-based state observer feedback estimate variables that were difficult measure. LQG controller validated in terms accuracy index....
A loaded tooth contact analysis model was developed to assess transmission error by incorporating profile errors in a helical gear pair. Profile for all teeth of both the pinion and wheel were measured, mean computed integrated into model. To validate model, static (STE) measured experimentally. The experimental results, particularly peak-to-peak (PPSTE) relation torque tooth-meshing harmonics, demonstrated consistency with simulation outcomes. Subsequently, employed investigate impact...
This article reports on the curing performance of UV-curable acrylic binders prepared with trifunctional monomers and a photoinitiator. The reaction was achieved by direct excitation pressure-sensitive adhesives (PSAs) irradiation 100-W high-pressure mercury lamp different UV doses. PSAs studied photo-differential scanning calorimetry (photo-DSC), gel-fraction determination Fourier transform infrared–attenuated total reflection (FTIR–ATR) spectroscopy. rate extent were found to be strongly...
Abstract Myeloid-derived suppressor cells (MDSCs) are increased by tumor-derived factors and suppress anti-tumor immunity. MDSCs obtained at a late time point after tumor injection had stronger suppressive activity than an early point, as measured T cell proliferation assays. To find in that change during growth, we analyzed gene expression profiles from different points injection. We found immune response-related genes were downregulated but protumor function-related upregulated both...
Myeloid-derived suppressor cells (MDSCs), which suppress diverse innate and adaptive immune responses thereby provide an evasion mechanism for tumors, are emerging as a key population linking inflammation to cancer. Although many inflammatory factors that induce MDSCs in the tumor microenvironment known, crucial components underlying mechanisms remain elusive. In this study, we proposed novel by serum amyloid A3 (SAA3), well-known factor, connects with cancer progression. We found SAA3...
This paper presents a reconfigurable wide input power range radio frequency (RF) energy harvester (EH) with alliance for wireless (A4WP) receiver (WPR). A RF-DC converter RF EH and maximum point tracking algorithm are proposed to maintain high efficiency over -20 +20 dBm. The A4WP WPR is designed merged the receive higher than In order improve conversion (PCE), delay between ac voltage current compensated by open-loop compensation method. chip implemented in 0.18 μm...
This paper presents the synthesis of grain size-controlled 2D perovskite films for high-performance photodetectors by combining solvent engineering and hot casting.