A5100444295- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Microwave Engineering and Waveguides
- Metamaterials and Metasurfaces Applications
- Advanced Wireless Network Optimization
- Network Traffic and Congestion Control
- RFID technology advancements
- Physics of Superconductivity and Magnetism
- Energy Harvesting in Wireless Networks
- Electromagnetic Compatibility and Noise Suppression
- Semiconductor Quantum Structures and Devices
- Cooperative Communication and Network Coding
- GaN-based semiconductor devices and materials
- Advanced Wireless Communication Techniques
- Caching and Content Delivery
- Wireless Communication Networks Research
- Education and Learning Interventions
- Fluid Dynamics and Turbulent Flows
- Engineering Applied Research
- Software-Defined Networks and 5G
- Electromagnetic Compatibility and Measurements
- Semiconductor Lasers and Optical Devices
- Innovation in Digital Healthcare Systems
- Magnetic properties of thin films
- Wireless Networks and Protocols
Korea Advanced Institute of Science and Technology
2000-2024
Electronics and Telecommunications Research Institute
2004-2024
Gyeongsang National University
2024
Korea Institute of Machinery and Materials
2006-2024
Kyungpook National University
1996-2024
Pusan National University
2014-2024
Sejong University
2014-2023
Hanwha Solutions (South Korea)
2023
Korea Maritime and Ocean University
1986-2023
Dongguk University
2020-2023
This paper aims to elicit insights about sustainable wearables by investigating recent advancements in wearable technology and their applications. Wearable has advanced considerably from a technical perspective, but it stagnated due barriers without penetrating wider society despite early positive expectations. situation is the motivation behind focus on studies many research groups years into applications that can provide best value human-oriented perspective. The expectation new means...
Bioethanol currently contributes ∼2% to the total US transportation fuels mix, and another ∼0.01% is based on biodiesel. To make a substantial contribution United States' energy portfolio, biofuels production needs grow substantially over next decade by factor of 10 or more. Although agro-energy crops agriculture waste for being intensively developed, potential forest products industry contribute this effort has been generally underestimated. The one few nationally industries that have...
An effective method for depositing highly transparent and conductive ultrathin silver (Ag) electrodes using minimal oxidation is reported. The of Ag layers significantly improves the intrinsic optical structural properties without any degradation its electrical conductivity. Oxygen‐doped (AgO x ) thicknesses as low 6 nm exhibit completely 2D continuous morphologies on ZnO films, smaller reflections absorbances, sheet resistances compared with those discontinuous granular‐type same thickness....
Stefan Ultes, Lina M. Rojas-Barahona, Pei-Hao Su, David Vandyke, Dongho Kim, Iñigo Casanueva, Paweł Budzianowski, Nikola Mrkšić, Tsung-Hsien Wen, Milica Gašić, Steve Young. Proceedings of ACL 2017, System Demonstrations. 2017.
A novel combined beam antenna for 5G communications using a 28-GHz frequency band is proposed, which provides tilted radiation on an elevation plane. Instead of applying conventional array technique to produce scanned beam, two different radiating elements have been in order obtain relatively wide but high gain target direction. There are main radiators; one group microstrip patches, and the other waveguide aperture. The patches split strong beams azimuth aperture further increases Finally,...
A dual-band passive radio frequency identification (RFID) tag antenna applicable for a recessed cavity in metallic objects such as heavy equipment, vehicles, aircraft, and containers with long read range is proposed by using an artificial magnetic conductor (AMC) ground plane. The consists of bowtie the AMC plane installed on bottom side cavity. utilized to provide operation at European (869.5 869.7 MHz) Korean (910 914 UHF RFID bands replacing PEC-like behavior and, therefore, changing...
A low-profile (aplambda/100) passive radio frequency identification (RFID) tag antenna incorporated with a compact artificial magnetic conductor (AMC) substrate is proposed. novel modified rectangular patch type AMC offset vias employed to significantly reduce the planar dimensions of antenna, which about 0.1lambda times 0.2lambda. The effect ground plane size and number unit cells on performance such as return loss gain investigated view installation. It demonstrated through experiments...
The r-Learning paradigm with educational robots is emerging as a part of e-Learning, which means using technology for learning. This study on teaching assistant robot opened the possibility English in classroom. We found that children like services personal relationship class and teachers prefer them related to their convenience manage lesson. Related such praising cheering up or calling roll are effective way motivating learn, enhancing between TIRO children. going conducting further field...
Previously, we found that osteogenic responses to zirconia co-doped with niobium oxide (Nb 2 O 5 ) or tantalum (Ta are comparable titanium, which is widely used as a dental implant material. The present study aimed evaluate the in vitro potential of hydroxyapatite (HA)-coated by an aerosol deposition method for improved osseointegration. Surface analysis scanning electron microscopy and x-ray diffraction proved thin as-deposited HA film on showed shallow, regular, crater-like surface....
Abstract Tumor-associated macrophages (TAMs) are vital contributors to the growth, metastasis, and therapeutic resistance of various cancers, including hepatocellular carcinoma (HCC). However, exact phenotype TAMs mechanisms underlying their modulation for purposes have not been determined. Here, we present compelling evidence that glutamine-derived aspartate in stimulates spermidine production through polyamine synthesis pathway, thereby increasing translation efficiency HIF-1α via eIF5A...
A passive RFID tag antenna in a recessed cavity metallic objects such as vehicles, air craft, and containers, an impedance matching technique for this configuration are proposed. The proposed can be considered cavity-backed it is comprised of bowtie installed cubic volume large object, the input easily matched by adjusting coupling effect between cavity. Main parameters affecting dimensions location inside For more practical analysis process, equivalent-circuit model consisting several...
POMDP algorithms have made significant progress in recent years by allowing practitioners to find good solutions increasingly large problems. Most approaches (including point-based and policy iteration techniques) operate refining a lower bound of the optimal value function. Several (e.g., HSVI2, SARSOP, grid-based online forward search) also refine an upper bound. However, approximating function is computationally expensive therefore tightness often sacrificed improve efficiency sawtooth...
A miniaturized electrical beam-scanning reflectarray antenna providing a directional beam and wide steering ranges with fixed <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\theta $ </tex-math></inline-formula> -polarization is proposed. To accomplish these properties, we devise new active cell that can control both the phase polarization of incident waves. Accordingly, enforce all reflected waves to...
Abstract A high‐gain antenna using a single layer metamaterial (MTM) superstrate with zero refractive index ( n ) is proposed. To enhance the magnitude and flatness property of gain at same time, effectively behavior used, which gathers wave emitted from microstrip patch collimates it toward normal direction antenna. Both simulation measurement results provide that realized proposed increased by about 5 dB no more than 1.5 in predicted frequency band, where MTM designed to have refraction....
Constrained partially observable Markov decision processes (CPOMDPs) extend the standard POMDPs by allowing specification of constraints on some aspects policy in addition to optimality objective for value function. CPOMDPs have many practical advantages over since they naturally model problems involving limited resource or multiple objectives. In this paper, we show that optimal policies can be randomized, and present exact approximate dynamic programming methods computing randomized...
A passive radio frequency identification (RFID) tag antenna providing a long recognition distance is proposed, which mountable on various types of platforms including metallic and highly dielectric objects. To increase the reading distance, installed in recessed cavity. reduce further height antenna, an artificial magnetic conductor placed bottom face Consequently, not only can be miniaturised, but also provide distances any type platform The measured maximum minimum sensitivity are 12.2 m...
WiFi based indoor positioning has recently gained more attention due to the advent of IEEE 802.11v standard, requirements by FCC for E911 calls, and increased interest in location-based services. While there exist several localization techniques, we find that these techniques tradeoff either accuracy, scalability, pervasiveness or cost -- all which are important a truly deployable solution. Wireless signal-strength approaches suffer from location errors, whereas time-of-flight (ToF)...