A5062101749- Speech and Audio Processing
- Music and Audio Processing
- Blind Source Separation Techniques
- VLSI and FPGA Design Techniques
- Advanced Adaptive Filtering Techniques
- VLSI and Analog Circuit Testing
- Advancements in Battery Materials
- Interconnection Networks and Systems
- Low-power high-performance VLSI design
- Music Technology and Sound Studies
- Advanced Battery Materials and Technologies
- Underwater Acoustics Research
- Plant nutrient uptake and metabolism
- Acoustic Wave Phenomena Research
- Advanced battery technologies research
- Structural Health Monitoring Techniques
- Supercapacitor Materials and Fabrication
- Plant Molecular Biology Research
- Plant Stress Responses and Tolerance
- Speech Recognition and Synthesis
- Indoor and Outdoor Localization Technologies
- Advanced Battery Technologies Research
- Transportation Planning and Optimization
- Image and Signal Denoising Methods
- Advanced SAR Imaging Techniques
Kyungpook National University
2019-2025
Sungkyunkwan University
2022-2024
Korea University
2018-2024
Kongju National University
2024
Electronics and Telecommunications Research Institute
2005-2022
Seoul National University
2008-2019
Kyonggi University
2014-2017
Korea Naval Academy
2016
Chonnam National University
2014
LG (United States)
2013
Salt stress constitutes a major form of abiotic in plants. Histone modification plays an important role tolerance, with particular reference to salt resistance. In the current study, we found that HDA15 overexpression confers resistance young seedling stages transgenic Furthermore, induces overexpression. Transcription levels stress-responsive genes were increased plants overexpressing ( OE ). NCED3 , abscisic acid (ABA) biosynthetic gene, which is highly upregulated plants, enhanced...
Abstract Grid‐scale energy storage system is the need of batteries with low‐cost, high‐energy‐density, and long cycle life. The requirement promotes discovery cathode materials enabling charge carrier ion within open framework crystal structure having multi‐dimensional diffusion path exhibiting small volume change. Herein, Na 2 TiFeF 7 reported as a promising fluoride‐based material for sodium‐ion (SIBs). Through combined studies using various experiments first‐principles calculations, it...
Abstract Layered‐type transition metal (TM) oxides are considered as one of the most promising cathodes for K‐ion batteries because large theoretical gravimetric capacity by low molar mass. However, they suffer from severe structural change de/intercalation and diffusion K + ions with ionic size, which results in not only much lower reversible than but also poor power capability. Thus, it is important to enhance stability layered‐type TM outstanding electrochemical behaviors under battery...
Plants cannot fix nitrogen directly; they must absorb it from the soil through their roots, or in rare cases, form associations with nitrogen-fixing bacteria. The efficiency of use most domesticated crops is low, and more than half available can leach into environment. Understanding signaling pathways essential for maximizing crops. In present study, we characterized Myeloblastosis (Myb)-like gene NITROGEN RESPONSE DEFICIENCY 1 (NID1). We observed that growth performance nid1 knockout (KO)...
In this paper, a feature extraction method is proposed based on the non-negative matrix factorization (NMF) for classifiers monitoring domestic activities with acoustic signals. Most of signals use data-independent spectral features (e.g., log-Mel spectrum and Mel-frequency cepstral coefficients). Recently, some novel methods have been researched, including convolution-NMF-based combined K-means clustering. This study proposes an enhanced NMF-based that inspired by noise reduction algorithm....
As interconnection delay plays an important role in determining circuit performance field programmable gate arrays (FPGAs), timing-driven FPGA routing has received much attention recently. In this paper, we present a new algorithm for FPGAs. The minimizes critical path given placed using the Lagrangian relaxation technique. multipliers used to relax timing constraints are updated by subgradient method over iterations. Incorporated into cost function, these guide router construct tree each...
In this letter, we develop a multichannel blind source separation algorithm based on beamspace transform and the nonnegative matrix factorization (NMF) method. The conventional NMF performs well with mixing data, but there is still room for enhancement in real-world recording data. consider beamspace-time-frequency domain data model method, enhance method using transform. Our decomposition applied to 2-channel 4-channel unsupervised audio separation, dataset from international Signal...
In active sonar systems, the detection of echo from targets can deteriorate due to reverberation. Detection becomes more difficult if have low-Doppler frequency and are located near reverberation band, especially in an environment with low signal-to-reverberation ratio. this paper, we propose algorithm for suppression continuous wave signals using non-negative matrix factorization. To extract target signal mixed reverberations, bases independently defined, different constraints applied their...
An amorphorized Cu(PO 3 ) 2 /C composite (A-CPO/C) achieves outstanding electrochemical performances compared to a low-crystalline (LC-CPO/C) composite.
Delay evaluation is always a crucial concern in the VLSI design and it becomes increasingly more critical nowadays deep-submicron technology. To obtain an accurate delay value, gate modeling key issue. As feature size scaling down meanwhile operating frequency increasing, work difficult than ever for high-performance digital ICs. Nevertheless, most conventional techniques of are based on switch-resistor model;(i.e., voltage source concatenating driving resistance), which can only capture...
In this study, we propose a reverberation suppression algorithm for linear frequency-modulated (LFM) pulse sonar systems using non-negative matrix factorization (NMF) method. Because conventional NMF-based algorithms are only applicable to continuous wave reverberation, two pre-processing methods, namely dechirping transformation and modulo operation, facilitate application of the NMF method LFM reverberation. Moreover, impose additional sparse constraints on improve its performance. To...
A multichannel blind source separation algorithm based on the non‐negative matrix factorisation (NMF) model and an alternating least squares (ALS) method is developed. To develop proposed algorithm, NMF (MC‐NMF) modified with stacked notation. In model, all parameters – frequency basis, time basis mixing are estimated using ALS method. The MC‐NMF evaluated ‘underdetermined speech music mixture’ dataset from International Signal Separation Evaluation Campaign 2013 (SiSEC 2013). Experimental...
In this paper, we propose a modified RLS algorithm with Adaptive Forgetting Factor using low-complexity forgetting factor update equation. The conventional AFF-RLS method has high-complexity equation to factor. order reduce complexity, an approximated version of the had been derived by Song. But shows degraded performance because it suffers from `gradient error amplification' problem. obtain same as relatively low computational cost, noted that `method steepest descent', and use...
Delay evaluation is always a crucial concern in the VLSI design and it becomes increasingly more critical nowadays deep-submicron technology. To obtain an accurate delay value, gate modeling key issue. As feature size scaling down meanwhile operating frequency increasing, work difficult than ever for high-performance digital ICs. Nevertheless, most conventional techniques of are based on switch-resistor model;(i.e., voltage source concatenating driving resistance), which can only capture...
The routing channels of an FPGA consist wire segments various types providing the tradeoff between performance and routability. In architectures recently developed FPGAs (e.g., Virtex-II), there are more versatile richer connections them than those older generations (e.g. XC4000). To fully exploit potential new architectures, it is beneficial to perform type assignment for all as intermediate stage global detailed routing. this paper, we present a wire-type algorithm that based on...