A5015622715- Terahertz technology and applications
- Spectroscopy and Laser Applications
- Photonic and Optical Devices
- Semiconductor Quantum Structures and Devices
- Power System Optimization and Stability
- Gyrotron and Vacuum Electronics Research
- Optimal Power Flow Distribution
- Superconducting and THz Device Technology
- Laser-Plasma Interactions and Diagnostics
- Scheduling and Optimization Algorithms
- Laser-Matter Interactions and Applications
- Particle accelerators and beam dynamics
- Advanced Manufacturing and Logistics Optimization
- Particle Accelerators and Free-Electron Lasers
- Photonic Crystals and Applications
- Superconducting Materials and Applications
- Bacterial Genetics and Biotechnology
- Manufacturing Process and Optimization
- DNA Repair Mechanisms
- Electrical Fault Detection and Protection
- Misinformation and Its Impacts
- Power System Reliability and Maintenance
- Muon and positron interactions and applications
- Smart Grid Security and Resilience
- Sesame and Sesamin Research
Ajou University
2025
Institute for Basic Science
2014-2024
Seoul National University
2023
Sungkyunkwan University
2023
Agency for Defense Development
2020
Hanyang University
2018-2020
Pukyong National University
2019
Catholic University of Daegu
2018
Osaka University
2012-2016
Korea Advanced Institute of Science and Technology
2002-2016
A membrane carbonation (MC) module uses bubbleless gas-transfer membranes to supply inorganic carbon (C(i)) for photoautotrophic cyanobacterial growth in a photobioreactor (PBR); this creates the novel MCPBR system, which allows precise control of CO(2)-delivery rate and minimal loss CO(2) atmosphere. Experiments controlled C(i) main PBR by regulating recirculation (Q(R)) between MC chamber PBR. The experiments evaluated how Q(R) controls mass transport it connects with biomass production...
Developing new organic crystals for efficient broad terahertz (THz) wave generation remains challenging, as multiple critical material properties must be achieved simultaneously within a single crystal. In this work, we introduce series of nonlinear optical salt tailored THz generators. The newly designed fluorinated cationic chromophore, 6-fluoro-2-(4-hydroxystyryl)-1-methylquinolinium (OH6FQ), has been incorporated with various or non-fluorinated anions into six different ionic crystals....
Radially polarized intense terahertz (THz) radiation behind a thin foil irradiated by ultrahigh-contrast ultrashort relativistic laser pulse is recorded single-shot THz time-domain spectroscopy system. As the thickness of target reduced from 30 to 2 µm, duration emission increases 5 over 20 ps and energy dramatically, reaching ∼10.5mJ per pulse, corresponding laser-to-THz conversion efficiency 1.7%. The efficient can be attributed reflection (deceleration acceleration) laser-driven hot...
The origin recognition complex, Cdc6 and the minichromosome maintenance (MCM) complex play essential roles in initiation of eukaryotic DNA replication. Homologs these proteins may similar archaeal replication initiation. While interactions among are well documented, protein–protein between have not yet been determined. Here, an extensive structural functional analysis Methanothermobacter thermautotrophicus MCM two (Cdc6-1 -2) identified organism is described. main contact occurs via...
A feasibility study on the characterization of incipient insulator failure for distribution fault prediction is presented. In this study, real data was collected and analyzed to isolate signatures or parameters which were expected show distinct behaviors before after incident. Several signal analysis methods applied a new strategy analysis, event-date concept, also find relationship between nonharmonic high frequency activities imminent failures.
This study addresses an integrated batching and scheduling problem for a single-machine flexible machining cell in which each pallet can load multiple parts, i.e. multi-fixturing pallets, part processing times be changed with different costs, controllable times. The sub-problem is to select the set of parts produced period planning horizon resulting determine loaded on pallet, input/processing sequences selected period. A bi-criterion objective considered that minimises total tardiness cost...
Although most of the pandemic-related mandatory restrictions have been lifted or eased, vaccination is still recommended as an effective measure to minimize damage from COVID-19 infection. Since eradication unlikely, it necessary understand factors affecting public's intention when continuously recommended. This study aims explore that affect repeat in South Korea. An online survey was conducted January 2022 with adults living Gyeonggi-do, In a hierarchical logistic regression analysis,...
This study addresses the problem of determining allocation operations and their tools to machines, operation processing times allocation/sequence parts be processed on each machine for flexible manufacturing systems with controllable times. Tool lives, tool copies sharing are also considered. An integer programming model is developed objective minimizing sum tardiness costs. Then, iterative algorithms proposed that solve two subproblems iteratively, where loading subproblem solved by a...
Current Transformer (CT) saturation may cause the maloperation or operating time delay of protective relays. In this paper, a CT detection algorithm based on wavelet transformation is suggested. The WT (Wavelet Transformation) can be easily implemented with multilevel filter banks. Daubechies 2 used as mother in proposed algorithm. A second order Butterworth high-pass to extract fine peak feature from output signal series test results show that detects saturated region accurately under...
A single-shot terahertz time-domain spectroscopy method is developed using an echelon-pair. Terahertz waveform encoded to a beamlets array by electro-optic effect, with total time window of 37.7 ps and step 94.3 fs. Comparing spectral encoding methods, this technique directly encodes spatial resolution, which more suited as diagnosis for high power ultra-short laser systems inherent fluctuations.
This study addresses a part selection problem for flexible manufacturing systems in which processing times are controllable to optimize the total cost associated with energy consumption, operational performance, and so on. The is determine set of parts be produced, number tools each tool type period planning horizon while satisfying time capacity, magazine capacity life restrictions. objective minimize sum processing, earliness/tardiness, subcontracting costs. Tool sharing among types also...
Objectives: The aim of this study is to give recommendations on public drinking restriction in the alcohol accessibility policies order bring about changes consumption norm. Methods: As for in-country literature, reports government agencies and research papers were reviewed. Results: Though prohibition laws differ from state state, one common law that every shares are that, it illegal drink areas Australia. Canada's jurisdiction based federal or local government. All territories states...
DNA helicases play essential roles in many cellular processes. The currently available techniques to generate substrates for helicase assays are fairly complicated and need some expertise not all laboratories. Here, a PCR-based method substrate assay is described, its application several archaeal, bacterial viral enzymes demonstrated.
Power, spectral characteristics, and angle distribution of terahertz (THz) radiation from air irradiated by a single (ω) or coupled (ω, 2ω) femtosecond laser pulses are analyzed for higher intensities, which non-linear plasma effects on the pulse propagation become essential, means multidimensional particle-in-cell simulations exploiting self-consistent kinetics. THz is shown to be result beat waves generated at ionization front with fundamental second harmonic waves. At lower power growth...