A5100328517- Fuel Cells and Related Materials
- Advanced Wireless Communication Techniques
- Membrane-based Ion Separation Techniques
- Conducting polymers and applications
- Wireless Communication Networks Research
- Advanced battery technologies research
- Advanced MIMO Systems Optimization
- Electrocatalysts for Energy Conversion
- Antenna Design and Analysis
- Ultra-Wideband Communications Technology
- Membrane Separation and Gas Transport
- Cooperative Communication and Network Coding
- Advanced Sensor and Energy Harvesting Materials
- Semiconductor materials and devices
- Integrated Circuits and Semiconductor Failure Analysis
- Microwave Engineering and Waveguides
- Telecommunications and Broadcasting Technologies
- Laser and Thermal Forming Techniques
- solar cell performance optimization
- Heat Transfer and Boiling Studies
- Microwave and Dielectric Measurement Techniques
- Covalent Organic Framework Applications
- Brain Tumor Detection and Classification
- Semiconductor materials and interfaces
- Advanced Wireless Communication Technologies
Sungkyunkwan University
2024
Oklahoma State University Oklahoma City
2023
Kolon Industries (South Korea)
2023
Humboldt-Universität zu Berlin
2023
Leibniz Institute for Agricultural Engineering and Bioeconomy
2023
Hanyang University
2003-2020
Chung-Ang University
2013-2015
Chung Cheong University
2012
Sejong University
2003-2012
University of Arizona
2010
Abstract Changes in conductivity with repeated fabric extension were investigated to improve the properties of conductive electrode pad material used for electrotherapy when it is subjected various movement human body. Highly stretchable and fabrics prepared by situ chemical polymerization polypyrrole on nylon–spandex stretch aqueous solutions 0.5 M pyrrole, 1.165 FeCl 3 , 0.165 benzenesulfonic acid at 5°C 1 h. Performance was evaluated terms changes as a function tensile strain, extension,...
Grasslands play a crucial role in European agriculture and ecology, but are often underutilized due to low-value end-products. The utilisation of late-harvest grass for biochar heat generation on farm-level is being studied as potential negative emissions technology. Technical (energy provision carbon sink), economic (cost vs. benefit), political (regulatory framework) social (SWOT) perspectives evaluated. feasibility has been demonstrated with three different farm-scale technologies the...
Abstract Polypyrrole (PPy) films doped with arylsulfonate dopants were prepared by electrochemical polymerization, to investigate the effects of various on conductivities, thermal stabilities, and morphologies PPy films. Also, HCl was added those as a cooperating dopant, improve conductivity Conductivity film mixture each dopant improved. Temperature dependency for investigated heating them from 30 300°C. For TSA, DBSA, AQSA, increased up 150°C then rapidly decreased, whereas other decreased...
A planar inverted F antenna (PIFA) is integrated with a software-defined match control (SDMC) circuit in order to create an impedance for diverse set of frequency standards. The individual PIFA achieves better than 10 dB reflection coefficient 13.6% bandwidth at 2.45 GHz. SDMC microstrip tuning diodes that are adjusted tune the input and select targeted range operation. It both tuner tunable filter. This paper discusses design approach system presents simulated measured results. results show...
The rapid proliferation of digital consumer electronics devices within the home is calling for advent entertainment networks. In order to meet demand a low cost, high performance wireless network able support streaming multimedia content and full motion video, new kind networking scheme proposed, which combines spectrally efficient UWB (ultra wide-band) technology. This paper investigates modulation schemes design approach improving
Anion exchange membranes fabricated through a one-step Menshutkin reaction with down-selected multifunctional alkyl halides and tertiary amines within an ion-solvating matrix, poly(ethylene-co-vinyl alcohol), yielded alkaline-stable ammonium network polymers. Due to the vast simplicity in fabrication due quaternization/Menshutkin between amine bromides, which does not evolve any by-products that require purification, were one step facile mixing curing of forming monomers. Prepared showed...
To obtain both spatial multiplexing and diversity gains simultaneously, hybrid system was introduced in MIMO-OFDM system, which combines space time coding (STC) division (SDM) schemes. Therefore, achieve by reducing a little performance. Representative is consisting as block (STBC) (SM) symbols. However,the has the almost same bit error rate (BER) performance decision feedback equalization (DFE) ordered successive interference cancellation (OSIC). we should improve of system. In this paper,...
DVB standards are currently being implemented in various countries, not only Europe, but also around the world. In order to meet consumers' demands, support interactive services. Among broadcasting services, DVB-RCT based on OFDM can be used for service terrestrial network. To improve system performance, a combining of MIMO signal processing with is very efficient solution. detect received low complexity, an detection technique K-best scheme proposed this paper. The overcome limitations...
Green hydrogen production through renewable energy-based water electrolysis is the most efficient technology for decarbonization, and demand has recently been rapidly increasing. Addressing this surge in requires rapid development of reliable large-scale manufacturing methods PEMWE membrane-electrode assemblies (MEAs). For manufacturing, it necessary to optimize electrode components, including catalysts, binders, solvents, additives, as well their dispersion methods. Particularly, ensuring...
Perfluorosulfonic acid (PFSA) polymer commonly offer high ionic conductivity, chemical and physical properties, rapid response, making them widely used in energy conversion technologies like fuel cell water electrolysis. Industrial commercialization of the electrolyte membranes for electrolysis depends not only on sufficient electrochemical performance but also requires gas barrier properties dimensional stability. To improve these selection an appropriate dispersion solvent optimization its...
Recently, the orthogonal frequency-division multiple access (OFDMA) based wireless communication system is usually used in interactive digital video broadcasting environments or metropolitan area network (WMAN). Therefore, relative condition of inter-user channel can be easily deteriorated. This paper proposes and evaluates mutual amplify-and-forward (AF) cooperative between two users using modified space time block code (STBC) to provide reliability for an OFDMA with a single antenna...
This article focuses on orthogonal pattern louver mixer's mixing and hydraulic performance in a square ducts. Various configurations, including the following parameters, were considered: for dual mixers, mixer spacing, orientation examined, while angle array size tested both single mixers. Operational parameters such as length, total flow rate, rate ratio between cold warm air considered. The results compared to other types, orifice type mixers ASHRAE Standard 41.2-based was found have...
In this paper, we describe selective deposition of a major electrode and protection in heterojunction with intrinsic thin-layer (HIT) type solar cell. Sn Ni were used for the to prevent oxidation Cu, which was main electrode. SEM TEM analyze microstructural evolution changes interface as result each electroless deposition. Finally, performance our cell created via evaluated. We determined photovoltaic conversion efficiency (PCE) be 16.4 %, fill factor (FF) 72.2 open circuit voltage (Voc) 681...
We determined that the use of densification, sacrificial oxidation, gate oxidation and source/drain implantation has capability to reduce dislocation. A dislocation-free process is proposed, its mechanism presented in embedded flash memory. The dislocation decreased when n-type ions were implanted at a low energy level for source drain. dry using only oxygen without hydrogen logic gates led formation oxide on rapid thermal (RTP) methods densification after gap-filling as reducing processes....
Abstract not Available.
We investigate a home entertainment and computing network proposal, which takes advantage of UWB impulse radio technology. Time hopping combined with pulse position modulation represents the original proposal for communication systems. Recently, other schemes have been considered in order to obtain better performance particular scenarios. OFDM-based system uses OFDM frequency hopped train achieve full multipath diversity fading channels. Direct sequence code division multiple access is well...
In order to meet the various customers' demands, several devices supporting variable data rate from Kbps Gbps must be equipped on wireless personal area network (WPAN) environment. It causes a high cost and complexity satisfy compatibleness within any WPAN devices. Therefore, in this paper, multi-band orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) system is considered with multiple access scheme, time/frequency domain spreading, dilated dual carrier modulation...