A5045864868- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced MIMO Systems Optimization
- Advanced battery technologies research
- Advanced Wireless Network Optimization
- Coal Combustion and Slurry Processing
- Materials Engineering and Processing
- Cooperative Communication and Network Coding
- Advancements in Solid Oxide Fuel Cells
- Telecommunications and Broadcasting Technologies
- Recycling and utilization of industrial and municipal waste in materials production
- Minerals Flotation and Separation Techniques
- Supercapacitor Materials and Fabrication
- Recycling and Waste Management Techniques
- IPv6, Mobility, Handover, Networks, Security
- Lignin and Wood Chemistry
- Mobile Agent-Based Network Management
- Power Line Communications and Noise
- Service-Oriented Architecture and Web Services
- Catalysis and Hydrodesulfurization Studies
- Calcium Carbonate Crystallization and Inhibition
- Thermochemical Biomass Conversion Processes
- Plasma Applications and Diagnostics
- Millimeter-Wave Propagation and Modeling
- Mine drainage and remediation techniques
Gachon University
2025
Electronics and Telecommunications Research Institute
2005-2024
Korea Institute of Energy Research
2024
University of Ulsan
2020
Korea Institute of Science and Technology
2016-2018
Jeonju University
2003-2014
The University of Tokyo
2010
Seoul National University
2006-2009
Korea Institute of Geoscience and Mineral Resources
2005
Inha University
2004
A simple and novel electrostatic coupling method is reported, which provides a hyaluronic acid-quantum dot conjugate (HA-QD) that colloidally stable size-tunable from 50 to 120 nm. The HA-QDs show cancer targeting efficiency, suggests diagnostic imaging applications. conjugates are also demonstrated for the fluorescence staining capability lymphatic vessels in vitro vivo. Using small animal model, visualized real-time vivo days. Comprehensive cytotoxicity evaluations made unconjugated...
For many URLLC services, mobility is a key requirement together with latency and reliability. 3GPP has defined the target of MIT as 0 ms, general reliability 1 - 10-5 within ms for 5G. In this article, we analyzed impact handover failure (HOF) rate on performance. From analysis, at 120 km/h, required HOF to achieve 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-5</sup> only 0.52 percent. Therefore, URLLC, need minimize not but also close...
This study presents an AI-based sports broadcasting system capable of real-time game analysis and automated commentary. The model first acquires essential background knowledge, including the court layout, rules, team information, player details. YOLO model-based segmentation is applied for a local camera view to enhance recognition accuracy. Player’s actions ball tracking performed through algorithms. In each frame, detection used detect bounding boxes players. Then, we proposed our...
Mobility management is one of the most essential functionalities in mobile networks, providing seamless services for users. performance has been main focuses up to 5G. 3GPP introduced conditional handover (CHO) 5G improve (HO) performance. CHO a well-rounded technique that can solve trade-off between HO failure (HOF) and ping-pong. However, it incur waste radio resources due several extra preparations. Additionally, achieving an optimal solution balances ping-pong user perceived throughput...
A modified version of the conventional decal transfer method for fabrication electrodes polymer electrolyte membrane fuel cells is introduced. This makes use a carbon breaking layer to ensure high catalyst ratio during process. In order optimize this method, effect thickness microporous was also studied using thin-film/flooded agglomerate model. The structural features made by were investigated field-emission scanning electron microscopy, electrochemical impedance spectroscopy, mercury...
We describe issues on the TCP performance in LTE networks. throughput is determined by various factors such as window size, loss probability and RTT. present measurement results of a real testbed with auto-tuning enabled. As expected, test show that AM bearer outperforms UM due to less former. However, delay spikes incurred RLC ARQ increase RTT degrade performance. propose some enhancements for improving
We propose a service architecture for the next-generation wireless networks. In interest of creating "ubiquitous" platform (USP) heterogeneous networking environments, we address important issues related to "service convergence" and mobility." The objectives our work are threefold: firstly, making services available across different administrative technology domains; secondly, facilitating dynamic provision that can be discovered used without preconfigured subscription; lastly, movable in...
Network densification is regarded as the dominant driver for wireless evolution into era of 5G. However, in this context, interference-limited dense small cell deployments are facing technical challenges mobility management. The recently announced results from an LTE field test conducted a urban area show handover failure (HOF) rate over 21%. A major cause HOFs transmission command (HO CMD) messages. In paper, we propose two enhancements to HO performance networks — radio link...
Exposure of mouse mixed cortical cell cultures to lipopolysaccharide (LPS) resulted in inflammasome formation neurons and astrocytes, as indicated by increases the levels NLRP3, ASC, caspase-1, IL-1β. LPS exposure concurrently increased level free zinc cytosol both types. Addition membrane-permeant chelator TPEN blocked NLRP3 caspase-1 well release inflammatory cytokines, indicating a role for LPS-induced formation. Oxygen-glucose deprivation (OGD), cellular model hypoxia, also induced...
The purpose of this study is to investigate coal gasification for the production synthesis gas (syngas) using a non-transferred steam plasma system. effects feeding rate on cold efficiency, carbon conversion, and hydrogen conversion were evaluated by amount syngas from two kinds coals. Coal I low grade which has high moisture content II lower heating value (LHV) content. was varied 12.5 34.1 kg/h. Carbon oxygen ratios changed 0.3 0.8 0.5 1.2 II, respectively. For forming gas, supplied at 23...
In 5G, the required target for interruption time during a handover (HO) is 0 ms. However, when failure (HOF) occurs, increases significantly to more than hundreds of milliseconds. Therefore, fulfill requirement in as many scenarios possible, we need minimize HOF rate close zero possible. 3GPP has recently introduced conditional HO (CHO) improve mobility robustness. this study, propose "ZEro with Unforced and automatic time-to-execute Scaling" (ZEUS) algorithm optimize parameters easily CHO....
We conducted performance tests on a polymer electrolyte membrane fuel cell containing catalyst-coated in which artificial pinholes were introduced. The electrode assembly (MEA) with the punctured showed similar behavior to an unblemished MEA lower current density region. However, of pinhole higher region was inferior and unstable. structures defective analyzed by field-emission scanning electron microscopy, their electrochemical characteristics investigated impedance spectroscopy single-cell testing.
In LTE and NR, the user equipment initiates a recovery procedure when radio link failure (RLF) is declared. A shorter RLF timer T312 introduced to speed up from an lower outage time during handover. However, cannot remove completely guarantee successful recovery. this letter, event-based faster trigger scheme proposed remedy shortcomings of T312. The simulation results show that can almost fully reduce interruption caused by procedure, outperforming
To meet avalanche of traffic volume, the mmWave band in 30-300GHz range is being considered as a candidate for new radio bands 5G mobile communication systems. ETRI developing based system Giga KOREA (GK-5G) project. This paper introduces overview and features GK-5G evaluates coverage through level simulation considering real geospatial information.