A5047491735- Nanowire Synthesis and Applications
- Silicon Nanostructures and Photoluminescence
- Microgrid Control and Optimization
- 2D Materials and Applications
- Semiconductor materials and devices
- Microbial Metabolic Engineering and Bioproduction
- Plasmonic and Surface Plasmon Research
- Perovskite Materials and Applications
- Biofuel production and bioconversion
- Total Knee Arthroplasty Outcomes
- Orthopaedic implants and arthroplasty
- Advanced Photocatalysis Techniques
- Strong Light-Matter Interactions
- MXene and MAX Phase Materials
- Advanced Sensor and Energy Harvesting Materials
- ZnO doping and properties
- Smart Grid Energy Management
- Power Systems and Renewable Energy
- Clostridium difficile and Clostridium perfringens research
- GaN-based semiconductor devices and materials
- Semiconductor Quantum Structures and Devices
- Covalent Organic Framework Applications
- Hybrid Renewable Energy Systems
- Photonic and Optical Devices
- Ga2O3 and related materials
Daegu Gyeongbuk Institute of Science and Technology
2016-2025
Gyeonggi College of Science and Technology
2017-2024
Gachon University
2023
Inha University
2023
National Institute for Materials Science
2022
Chungnam National University
2022
Korea Basic Science Institute
2022
Korea Institute for Advanced Study
2022
Government of the Republic of Korea
2015-2021
Korea Electrotechnology Research Institute
2002-2020
In this paper, the cooperative control strategy of microsources and energy storage system (ESS) during islanded operation is presented evaluated by a simulation experiment. The ESS handles frequency voltage as primary control. And then, secondary in microgrid management returns current power output into zero. test results show that proposed can regulate voltage, action contribute to improve capability.
A microgrid is an aggregation of multiple distributed generators (DGs), such as renewable energy sources, conventional generators, and storage systems that provide both electric power thermal energy. Typically, a operates in parallel with the main grid. However, there are cases which islanded mode, or disconnected state. Islanded can change its operational mode to grid-connected operation by reconnection grid, referred synchronization. Generally, single machine simply synchronizes grid using...
In the current work, we demonstrate that single Cu atoms, which are site-specifically stabilized in Ti vacancy of TiO 2 , interact with surrounding and control overall electronic properties (reducibility defect formation) .
Crystalline silicon quantum dots (Si QDs) were spontaneously grown in the nitride films by plasma-enhanced chemical vapor deposition using SiH4 and NH3 as precursors. When size of Si QDs was reduced from 4.9 to 2.9nm, photoluminescence peak energy shifted 1.73 2.77eV. The fitted relationship, E(eV)=1.13+13.9∕d2, where d is diameter QD nanometers. measured band-gap energies good agreement with confinement model for crystalline QDs. These results suggest that hydrogen dissociated plays an...
This paper proposes a hardware in-the-loop simulation (HILS) system as new method to develop and test control algorithms operation strategies for microgrid. The HILS is composed of real-time digital simulator (RTDS) the microgrid, prototype microgrid management (MMS) under test, communication emulator interface between MMS RTDS. designed operate microsources power flow at point common coupling (PCC) in grid-connected mode, voltages frequency islanded mode tested respectively, show validation...
The electroluminescence intensity of a silicon quantum dot (Si QD) light-emitting diode (LED) with an Ag layer containing particles can be enhanced by 434% relative to Si QD LED without layer. large enhancement is attributed increase in radiative efficiency as result coupling between QDs and localized surface plasmons increased current injection through improved carrier tunneling into QDs.
Cu–Pt bimetallic nanoparticles deposited over blue titania exhibiting record photoconversion efficiency for CO<sub>2</sub> photoreduction into fuels.
Rotor eccentricity and local demagnetization in permanent magnet synchronous motors (PMSMs) increase unbalanced magnetic pull motor vibration resulting accelerated aging of components. If the asymmetry rotor remains undetected, it can severity, risk stator-rotor contact, which causes forced outage driven process. Detection PMSM currently relies on offline testing online vibration/current spectrum analysis. However, they are inconvenient or cannot provide reliable detection faults for all...
Abstract Systematic optimization of the photocatalyst and investigation role each component is important to maximizing catalytic activity comprehending photocatalytic conversion CO 2 reduction solar fuels. A surface‐modified Ag@Ru‐P25 with H O treatment was designed in this study convert vapor into highly selective CH 4 . Ru doping followed by Ag nanoparticles (NPs) cocatalyst deposition on P25 (TiO ) enhances visible light absorption charge separation, whereas modifies surface hydroxyl...
The photoluminescence (PL) property of crystalline silicon quantum dots (Si QDs) in nitride grown by using ammonia and silane gases is reported. peak position PL could be controlled the wavelength range from 450 to 700 nm adjusting flow rates gases. intensity Si QDs was more intense compared that nitrogen gas. To investigate role hydrogen enhancement, gas were postannealed under ambient. enhancement attributed passivation dangling bonds related and/or at interface nitride.
Strong coupling of light with excitons in direct bandgap semiconductors leads to the formation composite photonic-electronic quasi-particles (polaritons), which energy oscillates coherently between photonic and excitonic states vacuum Rabi frequency. The light-matter coherence is maintained until oscillator dephases or photon escapes. Exciton-polariton has enabled observation Bose-Einstein condensation solid-state, low-threshold polariton lasing also useful for terahertz slow-light...
Abstract Thiolase is the first enzyme catalysing condensation of two acetyl-coenzyme A (CoA) molecules to form acetoacetyl-CoA in a dedicated pathway towards biosynthesis n -butanol, an important solvent and biofuel. Here we elucidate crystal structure Clostridium acetobutylicum thiolase ( Ca THL) its reduced/oxidized states. THL, unlike those from other aerobic bacteria such as Escherichia coli Zoogloea ramegera , regulated by redox-switch modulation through reversible disulfide bond...
Clostridium is considered a promising microbial host for the production of valuable industrial chemicals. However, notorious difficulty genetic manipulations, and consequently metabolic engineering. Thus, much effort has been exerted to develop novel tools engineering strains. Here, we report development synthetic small regulatory RNA (sRNA)-based system controlled gene expression in acetobutylicum, consisting target recognition site, MicC sRNA scaffold, an chaperone Hfq. To examine...