A5050652727- Antenna Design and Analysis
- Real-Time Systems Scheduling
- Wireless Body Area Networks
- Network Time Synchronization Technologies
- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Microwave Engineering and Waveguides
- Antenna Design and Optimization
- Advanced Malware Detection Techniques
- Photonic Crystal and Fiber Optics
- Neuroscience and Neural Engineering
- Energy Harvesting in Wireless Networks
- Microwave Imaging and Scattering Analysis
- Microbial Inactivation Methods
- Immunotherapy and Immune Responses
- Network Security and Intrusion Detection
- Ultrasound and Hyperthermia Applications
- Analytical Chemistry and Sensors
- Advanced Sensor and Energy Harvesting Materials
- Analog and Mixed-Signal Circuit Design
- Ecology and Conservation Studies
- Embedded Systems Design Techniques
- EEG and Brain-Computer Interfaces
- Petri Nets in System Modeling
- Automotive and Human Injury Biomechanics
Fudan University
2017-2024
Kwangwoon University
2021-2024
Korea Advanced Institute of Science and Technology
2022
Korea University
2022
Yonsei University Dental Hospital
2022
Yonsei University
2016-2021
Zero to Three
2018
University of Seoul
2009-2015
Seoul National University
2012
Myongji University
2011-2012
Nowadays, cardiovascular disease is still one of the primary diseases that limit life expectation humans. To address this challenge, work reports an Internet Medical Things (IoMT)-based healthcare system with cross-layer optimization from sensing patch to cloud platform. A wearable ECG a custom System-on-Chip (SoC) features miniaturized footprint, low power consumption, and embedded signal processing capability. The also integrates wireless connectivity mobile devices platform for optimizing...
This paper analyzes the end-to-end delay of EtherCAT-based control processes that use events message frames and global clock for synchronized operation. With defined as time interval between start a process cycle actual input or output, we develop holistic model in EtherCAT, by taking into account in-controller processing, delivery, slave-local handling. Based on measurements from real EtherCAT system, discuss average deviation vary number slaves time. The experiment results show output...
Rehabilitation of stroke survivors has been increasing in importance recent years with increase the occurrence stroke. However, current clinical classification assessment is time-consuming while result not accurate and varies across physicians. This paper introduces an IoT-based upper limb rehabilitation system for based on wireless sensing sub-system, data cloud, computing cloud software Android platform. The can automatically perform objective assessment. It designed home as well concept...
In this study, a wideband patch array antenna for high-frequency 5G wireless communication is proposed. The needed to handle the increase in data traffic. proposed antenna, 2 × 16 element with gap-coupled parasitic elements and multi-section or stepped transformer feeding network feed cover prevent unwanted radiation, can new radio (NR) n257 (26.5–29.5 GHz), n258 (24.25–27.5 n261 (27.5–28.35 GHz) bands. Using single substrate instead of cavity stacked structures, wide impedance bandwidth (dB...
We investigated the effects of different fatty acids (FAs) or with degrees unsaturation on cytochrome P450 2E1 (CYP2E1) induction and protein kinase C (PKC) activity in human hepatoma HepG2 cells. As degree increased, cell survival rate decreased for FAs 18 carbons, but linolenic acid (LNA) docosahexaenoic (DHA) groups were similar even through they have unsaturation. Treatment palmitic (PA), oleic (OA), linoleic (LA), LNA, DHA resulted respective cellular FA concentrations C16:0 (43.1%),...
Guaranteeing isochronous transfer of control commands is an essential function for networked motion systems. The adoption real-time Ethernet (RTE) technologies may be profitable in guaranteeing deterministic messages. However, unpredictable behavior software the controller often results unexpectedly large deviation message transmission intervals, and thus leads to imprecise motion. This paper presents a simple efficient heuristic guarantee end-to-end with very small jitter. key idea our...
Deep core temperature is the most basic and important information about health conditions. The non-contact infrared thermometer widely used to measure of human body. However, cannot deep temperature. To overcome this limitation, measuring with a microwave radiometer gaining attention. In study, we propose dual-band on-body near-field antenna for application. proposed has compact size 20 mm × 30 1.52 mm. negative (-) radiator located at top substrate positive (+) bottom substrate. high...
Enzyme production by microorganisms on an industrial scale has demonstrated technical bottlenecks, such as low efficiency in enzyme expression and extracellular secretion. In this study, a potential tool for overcoming these limits, radio-frequency electromagnetic field (RF-EMF) exposure was examined its possibility to enhance of enzyme, α-amylase, filamentous fungus, Aspergillus oryzae. The RF-EMF perfectly resonated at 2 GHz with directivity radiation pattern peak gain 0.5 dB (0.01 Watt)....
Human deep core temperature is a vital health condition parameter. body change begins from the followed by in skin temperature. Measuring first action for rapid detection of condition. Infrared thermometer can measure temperature; however, only measures The use microwave radiometer measuring has garnered attention. antenna, an important component radiometer, rarely been focused upon studies on measurement This study proposed compact dual-band on-body near field antenna with reflector using...
Radio frequency (RF) hyperthermia focuses on raising the target area temperature to a value exceeding 45°C. Collagen is stimulated when rises 45°C at dermal layer, resulting in skin tightening. However, most studies RF have focused tumor ablation or using electrodes radiate an electromagnetic field, which highly inefficient. This study proposed non-invasive skin-tightening system with compact metamaterial-filled waveguide aperture antenna. The increased by 11.6°C and 35.3°C 20 80 W of 2.45...
The research area of the wearable electrochemical sensors is increasingly growing which are valuable for healthcare and fitness applications owing to their simplicity operation, low-cost, compact size. In this work, optimizing programmable analog front-end fully integrated sweat sensor proposed. proposed system can detect glucose, lactate, sodium, potassium at same time with low-power consumption suitable continuous real-time sensing system. average power in less than 2 mW 3.3 V supply voltage.
In this study, we proposed an indoor broadband dual-polarized 2 × MIMO (multiple-input and multiple-output) antenna having dimensions of 240 mm 200 40 mm, for application in 5G wireless communication systems. The comprised two vertically polarized circular monopole antennas (CMAs), horizontally modified rectangular dipole (MRDAs), a ground plane. distance between the MRDAs (MRDA1 MRDA2) was 70.5 109.5 horizontal (x-direction) vertical (y-direction) directions, respectively. Conversely, CMAs...
As the number of drones continues to increase and their applications become more widespread, importance neutralizing is becoming increasingly important. Despite existence studies on drones, only a few exist jammer antennas for antidrone systems. Handheld require high gain directivity beam patterns with narrow half-power beamwidths (HPBWs), while also covering multiple frequency bands used by drones. In this letter, we propose broadband enhanced Vivaldi antenna directors handheld system. The...
We have built a simple line-by-line spectral intensity coder with 4 GHz resolution at 1.55 µm using grating, collimating lens, and an mask.By applying 10 mode-locked comb to the coder, we generated relatively stable 20 -100 pulse trains steps.The characteristics of are examined quantitatively by measuring corresponding optical spectra, time-domain waveforms, autocorrelation traces, radio-frequency spectra.
We generate ~100 GHz pulse trains from a relatively low-speed mode-locked laser by line-by-line spectral coding using simple intensity and phase mask. To verify the generated pulses, optical spectra autocorrelation traces are examined.
As calcium silicate cements (CSCs) have been successfully used in various types of vital pulp therapy, many new CSC products developed. The aim this study was to evaluate the biocompatibilities and mineralization potential CSC. experimental materials were NeoMTA Plus EndoSequence Root Repair Material-Fast Set Putty (ERRM-FS) which compared ProRoot MTA. In vitro, effects on stem cells evaluated. Each prepared for cell viability testing, alkaline phosphatase (ALP) assay, ion release assay....
Motion control systems are widely deployed in various industrial automation processes. The motion controller, which is a key element of systems, has stringent real-time constraints. controller must provide short and deterministic message transmission cycle, minimize the actuation deviation among motor drives. To meet these requirements, hardware-based proprietary controllers have been prevalent. However, since it becoming difficult for such an approach to increasing needs system...
Dealing with the discomfort and complex setting-up of conventional wet electrodes in electroencephalography (EEG) monitoring for personal daily healthcare, a flexible finger-shaped active dry EEG electrode is developed tested this article. The electrodes, made polydimethylsiloxane (PDMS) elastic electrically conductive composite (ECC), penetrate through hair to achieve stable contact scalp. To improve quality weak signal acquisition, customized configurable application-specific integrated...
Due to the rapid evolution of mobile processors and wireless networks, many personal devices are able support wide spectrum Internet applications. In such systems, it is highly desirable provide high-speed communication while restraining CPU from wasting its resources. Previous study has revealed that bottlenecks on data movements over not only link but also bus between memory network controller. To overcome this performance limitation, we consider reducing size traversing link. paper,...