A5101679627- Advanced Wireless Communication Techniques
- Energy Harvesting in Wireless Networks
- Advanced Battery Technologies Research
- Advanced MIMO Systems Optimization
- Wireless Communication Networks Research
- Antenna Design and Analysis
- Bacterial biofilms and quorum sensing
- 3D IC and TSV technologies
- Error Correcting Code Techniques
- Bacterial Genetics and Biotechnology
- Porphyrin Metabolism and Disorders
- Advanced Wireless Network Optimization
- Photosynthetic Processes and Mechanisms
- Ferroelectric and Negative Capacitance Devices
- PAPR reduction in OFDM
- Molecular Junctions and Nanostructures
- Wireless Power Transfer Systems
- Electric and Hybrid Vehicle Technologies
- Legionella and Acanthamoeba research
- Cellular Automata and Applications
- Nanomaterials and Printing Technologies
- Advanced DC-DC Converters
- Advanced Sensor and Energy Harvesting Materials
- Technology Assessment and Management
- Firm Innovation and Growth
Korea University
2005-2025
SK Group (South Korea)
2022
Samsung (South Korea)
2022
The University of Texas at Dallas
2014
Kyung Hee Cyber University
2013
Georgia Institute of Technology
2008-2009
Chungbuk National University
2009
Zero to Three
2006
Purdue University West Lafayette
2006
Ajou University
2004-2005
This study examined the role of periplasmic oxidative defense proteins, copper, zinc superoxide dismutase (SodC), and thiol peroxidase (Tpx), from Shiga toxin-producing Escherichia coli O157:H7 (STEC) in formation biofilms. Proteomic analyses have shown significantly higher expression levels both antioxidant systems (SodC Tpx) STEC cells grown under biofilm conditions than planktonic conditions. An analysis their growth phase-dependent gene indicated that a high level sodC occurred during...
We report clog-free and oxide-free metal inkjet printing applicable to flexible electronics using gallium-based liquid alloy. Inkjet has been developed expanded make a pattern of either non-conductive or conductive materials. In order print typical material, it utilizes nanoparticle dispersed in solvent melts the metal. However, those methods often encounters clogging oxidation problem. fabricated simple polydimethylsiloxane (PDMS) based printer incorporated with hydrochloric acid...
Ever since the introduction of high bandwidth memory (HBM DRAM) and its succeeding line-ups, HBM DRAM has been heralded as a prominent solution to tackle wall problem. However, despite continual advancements advent high-end systems, including supercomputers, hyper-scale data centers machine learning accelerators, are expediting requirements for higher-performance solutions. To accommodate increasing system-level demands, we introduce HBM3 DRAM, which employs multiple new features design...
This article proposes a high-voltage-tolerant stacked buck converter compatible with Li-ion battery. The proposed utilizes power stage only low-voltage transistors (1.5 V) to safely convert 2.8–4.2 V battery voltage 1 output. adopts pulse frequency modulation control in the discontinuous conduction mode reduce losses at light load. To maximize efficiency for wide range of operating conditions, an inductor current emulator (ICE), which adaptively controls peak against input and load...
The goal of this paper is to develop equalizers which can provide soft information channel decoders for use in the initial stage iteration, equalization and decoding architectures. We propose an initial-stage structure by combining noncausality, bidirectionality processing common non-initial type such as ML, MAP, or interference, typically requires sufficiently accurate previous perform some cancellation, especially hostile conditions are hard equalize.
Cascade autoregressive (AR) model with three parameters for any channel prediction order p is investigated. Although higher AR better to get more precise future profile, as the of goes higher, number we have know increased. Besides that, pole locations may be extremely sensitive function coefficients high filter. If use cascade form lower filters which already used one fading generation methods, can stable prediction. Moreover, due a Doppler spectrum characteristic has only two peaks at...
A variance-optimized Rao-Blackwellization (VO-RB) soft decision scheme is presented for mitigating error propagation in a feedback equalizer (DFE). The VO-RB uses optimized variance the RB block to minimize cost function, instead of tentative output as original approach. This device can be employed stand-alone or jointly with any other joint optimization DFE filter bit rate (BER) function. In this paper, by itself and scaling HDTV EDGE systems, simulation results show performance gain with/...
In DDR5 dual-in-line-memory-modules (DIMMs), a registering clock driver (RCD) receives control, address, signals from CPU and re-drives them to dynamic random access memories (DRAMs) through transmission lines on printed circuit board (PCB). Especially, operate at double data rate (DDR) which makes it substantially difficult guarantee signal integrity (SI), whereas address single (SDR). As of now, JEDEC standards prescribes that the effective characteristic impedance be as low 22.5 Ohm for...
The goal of this paper is to develop equalizers which can provide soft information channel decoders for use in the single or initial stage iteration, equalization and decoding architectures, especially difficult equalize. We propose an structure by combining noncausality, bidirectionality processing, then we apply noncausal bidirectional DFE North American HDTV terrestrial broadcast EDGE cellular standard examine its performance.
MIMO-OFDMA 시스템에서 자원 할당의 최적화 문제가 거론되고 있다. 본 논문은 SFC 방식 아래 채널에 대한 정보를 가지고 적응 변조 및 부호 기법과 전력 제어 기법을 적용하여 전체 시스템 처리량의 최대화에 목표를 두었다. 첫 번째로 수신 받은 기반으로 각 서브 채널의 레벨이 결정된다. 그 다음으로는 타입에 맞게 서브캐리어가 할당되어진다. 시뮬레이션 결과는 실제로 전송되어진 데이터 용량 측면에서 기존의 알고리즘보다 제안한 알고리즘이 더 나은 성능을 보인다. The adaptive resource optimization problem in multi-input multi-output orthogonal frequency division multiple access (MIMO-OFDMA) systems is addressed. This paper, modulation and coding(AMC) power control algorithms proposed with...
Adaptive modulation and Coding(AMC) scheme is promising technique to support the demands for high data rates wideband proposed 4G mobile communication system standards. In this paper, adaptive coding(AMC) based on OFDM analyzed through simulation single user case compared with SISO-OFDM SFBC(Space frequency block coding)-OFDM. The performance analysis in terms of capacity downlink environments different values constellation size under multipath fading channel done. coding perfect estimation...
A multiple meander strip monopole antenna is presented. The structural feature of meandered vertical enables the to achieve both broadband characteristics and physical compactness. bandwidth for N=5 ranges from 2.9 GHz 10.85 with a radiation element volume 14/spl times/14/spl times/14 mm/sup 3/. proposed also exhibits good omnidirectional over wide frequency range.
Electrically small antennas are much smaller than a radiant sphere and they have narrow bandwidth because the quality factor, Q, of antenna is very high. Therefore, reduction Q an important factor in design electrically antennas. It has been reported that can be reduced, thereby increasing bandwidth, by effective use volume smallest enclose antenna. We present broadband which consists rectangular disk-loaded monopole probe with spiral strip line monopole. The broad impedance achieved through...