A5101539900- Wireless Body Area Networks
- Wireless Power Transfer Systems
- Energy Harvesting in Wireless Networks
- Quantum Mechanics and Non-Hermitian Physics
- Seismic Performance and Analysis
- Embedded Systems Design Techniques
- Optimal Power Flow Distribution
- Mechanical and Optical Resonators
- Cervical and Thoracic Myelopathy
- Metamaterials and Metasurfaces Applications
- Catalytic Processes in Materials Science
- Ultrasound and Hyperthermia Applications
- Antenna Design and Optimization
- Direction-of-Arrival Estimation Techniques
- Structural Behavior of Reinforced Concrete
- Aerogels and thermal insulation
- Cardiac Arrhythmias and Treatments
- Structural Response to Dynamic Loads
- Robotic Locomotion and Control
- Electric Power System Optimization
- Photorefractive and Nonlinear Optics
- Radar Systems and Signal Processing
- Vehicular Ad Hoc Networks (VANETs)
- Advanced Fiber Laser Technologies
- Electromagnetic Fields and Biological Effects
Incheon National University
2024
University of Southern California
2000-2024
Southern California University for Professional Studies
2024
Kyung Hee University
2019-2022
Eulji University
2021
Stanford University
2021
Kyungil University
2015
Universities UK
2000
American Society of Civil Engineers
2000
University of California, Irvine
2000
This paper presents a statistical analysis of structural fragility curves. Both empirical and analytical curves are considered. The developed utilizing bridge damage data obtained from the 1995 Hyogo-ken Nanbu (Kobe) earthquake. constructed on basis nonlinear dynamic analysis. Two-parameter lognormal distribution functions used to represent with parameters estimated by maximum likelihood method. also methods testing goodness fit estimating confidence intervals two (median log-standard...
This roadmap consolidates recent advances while exploring emerging applications, reflecting the remarkable diversity of hardware platforms, neuromorphic concepts, and implementation philosophies reported in field. It emphasizes critical role cross-disciplinary collaboration this rapidly evolving
An implantable biosensor for the long-range continuous glucose monitoring is proposed in this letter. A fully passive, miniaturized circuit composed of an <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</i> (inductor–capacitor) tank resonator with a volume 16 mm <inline-formula xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$^3$</tex-math></inline-formula> developed. This passive can be implanted under human skin,...
Recently, stationary wireless power transfer (WPT) has been widely adopted in commercial devices. However, the current WPT configuration is limited its operational area and susceptible to operating condition changes, impeding applications for dynamic environments. To overcome limitations, we propose a system with laterally aligned neutral elements parity-time (PT) symmetry, which can widen number of neutrals N . Compared conventional multiple-input–single-output WPT, dimension complexity...
Intervertebral discs (IVDs) have poor nutrient diffusion, because the nucleus pulposus (NP) lacks direct vascular supply and likely generates adenosine triphosphate by anaerobic glycolysis. Regulation of glycolysis is mediated hypoxia-inducible factor-1α (HIF-1α), a transcription factor that responds to local oxygen tension. Constitutively active HIF-1α (CA HIF-1α) was created point mutation determined protective role in IVD degeneration. Under fluoroscopy, rat caudal segments were stabbed...
We propose a biomedical sensor system for continuous monitoring of glucose concentration. Despite recent advances in implantable devices, mm sized devices have yet to be developed due the power limitation device tissue. here present wireless with backscattered frequency-modulation communication that enables low-power operation read level from fluorescent hydrogel sensor. The configuration reader structure is optimized an efficient transfer and data communication, miniaturizing entire 3 × 6 2...
We introduce a method to measure the fat thickness by harnessing physics of destructive interference. At certain frequencies, when equals quarter wavelength, amplitude reflected wave is minimized due Therefore, observing frequency where reflection minimized, we are able deduce thickness. This work demonstrates that this simple can operate not only on planar tissue model but also cylindrical as well Zubal human phantom model. Finally, experimentally demonstrate estimation for with broadband...
This paper proposes cavity resonators under parity-time- ($PT$) symmetric conditions for robust wireless power transfer (WPT) with minimal exposure to electromagnetic (EM) fields. Transceiver cavities the same resonant frequencies as that of fundamental mode are coupled through very small evanescent waves leaking out lattices on top surface cavities. reduces magnitude EM fields near power-delivery system by $10$ $10\phantom{\rule{0.1em}{0ex}}000$ times compared conventional coil systems....
The crystalline TiO2 powders were prepared by highly reactive supercritical fluid with unique properties of both liquid and vapor phases. In this research, the effects stirring heating rates on crystallization behavior investigated. size decreased from 90 to 60 nm as rate increased 0 up 150 rpm but 160 a further increase 400 rpm. crystals tend develop into spherical shape at below 50 morphology particles changed platelet 600 particle 200 3 12 °C/min, powder became more spherical.
Real-time durability monitoring systems in large building structures are an essential technology for smart cities. In this study, a structural-durability health-monitoring (SDHM) system is designed and demonstrated. The SDHM consists of embedded multisensing sensors, data processing modules, subwavelength wideband antenna operating at 900 MHz. sensors reversibly examine the degradation factors inside concrete, possibly offering real-time depth profiles. A ensures stable transmission...
Microwave ablation is a therapeutic procedure to eliminate abnormal tissue within body selectively. There are two types of ablations; the thermal one aims raise temperature at target, while non-thermal induces temporarily high electric field target disrupt cellular membrane integrity. This work identifies fundamental bounds efficiency for each type and sources achieve them. For both types, exceed performance existing solutions by tenfold, showing large room improvement. Finally, optimal...
We present a coupled distributed feedback (DFB) laser system, based on AlGaAs/GaAs epitaxially grown compound semiconductor, with electroluminescence near 820 nm. This DFB system supports two lateral modes sharing Bragg grating, thereby enabling simultaneous lasing operation at different frequencies. recorded dual-mode 4.2 nm wavelength spacing, corresponding to 1.86 THz beat frequency, and an output power of 14.7 mW injection current 195 mA. Compared previous works lasers, this design...
We model a chain of lasers with complex, asymmetric couplings and periodic boundaries. The unidirectional couplers enable phase locking generation light orbital angular momentum. discuss also monolithic non-Hermitian topological sensor.
A method of estimating the spatio-temporal channel parameter is proposed. Using a mechanically rotating antenna which has narrow beam width, we show how to estimate distribution incoming signal in directions angle and delay. With proposed method, estimation problem represented as deconvolution can be converted matrix equation with constraints. We also results tested field data.
최근 들어 빈번히 일어나는 지진은 교량에 심각한 손상을 줄 수 있기 때문에, 신설되는 교량에는 내진설계를 고려하고 기존의 노후 손상도 평가의 필요성이 대두된다. 본 논문은 지진에 의한 구조물의 손상 정도를 분석하기 위한 곡선을 작성하는 데 있어서 기존 연구에 적용된 미국형 인공지진을 우리나라 설계기준에 부합하는 한국형 인공지진으로 교체하는 과정을 연구한 것으로써, 지진의 지반특성인 최대지반가속도(PGA)에 대해 면진받침이 없는 경우와 있는 경우에 대한 작성하며 그에 적합한 인공지진의 생성방법을 도출하였다. Recently, frequent earthquakes can cause serious damage to the bridge. So newly constructed bridge is considered earthquake resistant design, and for existing old evaluation of state needed. In this paper,...
This paper addresses the unit commitment problem, where a system operator decides on-off status and amount of generation each generator for time period during given planning horizon to meet electricity demand at minimum cost. Especially, deal with uncertain demand, we consider stochastic expected cost is minimized under pre-determined set scenarios. To mitigate increasing computational burden problem as number scenarios increases, propose decomposition approach solve problem. It specialized...
Planar mirrored-coil structures are often used in the field of biomedicine as a sensor to measure physiological signals wirelessly. Although there many studies on interrogation methodologies, research itself remains understudied. In this article, we report an analytical formulation and data-fitted formula calculate resonant frequency for planar sensor. Compared measured results, our deviate by 13% 9% median errors, respectively, which is much more accurate than conventional one, 23%. It...