A5100618302- Advanced Thermoelectric Materials and Devices
- Cryptographic Implementations and Security
- Chalcogenide Semiconductor Thin Films
- Chaos-based Image/Signal Encryption
- Heusler alloys: electronic and magnetic properties
- Thermal properties of materials
- Coding theory and cryptography
- Thermal Radiation and Cooling Technologies
- 2D Materials and Applications
- Electromagnetic wave absorption materials
- Nanocomposite Films for Food Packaging
- Quantum Computing Algorithms and Architecture
- Advanced Cellulose Research Studies
- Advanced Malware Detection Techniques
- Advanced Antenna and Metasurface Technologies
- Electrospun Nanofibers in Biomedical Applications
- Ginseng Biological Effects and Applications
- Dialysis and Renal Disease Management
- Quantum-Dot Cellular Automata
- Cryptography and Data Security
- Perovskite Materials and Applications
- Motivation and Self-Concept in Sports
- Sport Psychology and Performance
- Catalytic Processes in Materials Science
- Eating Disorders and Behaviors
Kyungpook National University
2016-2025
Hansung University
2020-2024
Korea Advanced Institute of Science and Technology
2024
Institute for Advanced Engineering
2023
Kyung Hee University
2012-2023
Seoul National University of Education
2022
Silla University
2018-2021
Gyeongsang National University
2020-2021
Kookmin University
2019
Korea Center for Disease Control and Prevention
2015-2018
Multifunctional carboxymethyl cellulose/agar-based smart films were fabricated combining cellulose nanocrystals (CNC) separated from onion peel and shikonin isolated the roots of Lithospermum erythrorhizon. The CNC had a nanosized crystal structure with length width 225.6 ± 42.4 10.2 2.2 nm, respectively, having an aspect ratio 22.1. consistently dispersed in polymer matrix. integration significantly improved physical properties, for instance, mechanical, water resistance, optical...
The thermoelectric figure of merit ZT GeTe is increased by about 77% through the optimized carrier concentration and hyperconverged electronic structure Bi doping CuInTe 2 alloying.
With the ever-growing demand for eco-friendly energy sources to mitigate global rising temperatures, universal insatiable need sustainable and efficient are earnestly being intensively sought after. The ubiquitous heat within, if successfully tapped, is an utterly promising source of energy. To achieve this, a thermoelectric device (TED) needed. enhance conversion efficiency from useful electrical power, we developed strategy improve performance materials involved. In this work, equimolar...
Switchable tribological properties of ferroelectrics offer an alternative route to visualize and control ferroelectric domains. Here, we observe the switchable friction wear behavior using a nanoscale scanning probe-down domains have lower coefficients show slower rates than up can be used as smart masks. This asymmetry is enabled by flexoelectrically coupled polarization in down under sufficiently high contact force. Moreover, determine that this polarization-sensitive widely applicable...
SnTe is an exceptionally promising eco-friendly thermoelectric material that continues to draw immense interest as a source of alternative energy recovered from waste heat energy. Here, we investigate the effect introducing Cu single doping element rather than phase separated in followed by Sb co-doping tune lattice thermal conductivity. A microstructure evolution was observed which influences performance these SnTe-based materials. An overall power factor ∼22 μW/cmK2 and ultralow...
The new paradigm for increasing the commercial viability of thermoelectric materials in energy sector is theoretical prediction and subsequent experimental validation optimization cheaper inherently more efficient compositions. Herein, recently theoretically predicted ZrFe0.50Ni0.50Sb double half-Heusler ability to intrinsically tune this system optimized p- or n-type by varying Fe/Ni ratio synthesized ZrFexNi1–xSb (x = 0.35–0.65) samples are demonstrated. arc melting, hot pressing,...
Grover search algorithm is the most representative quantum attack method that threatens security of symmetric key cryptography. If applied to cryptography, level target cryptography can be lowered from n-bit n2-bit. When applying Grover’s block cipher potential attacks, must implemented as circuits. Starting with AES cipher, a number works have been conducted optimize and implement ciphers into Recently, many studies published lightweight In this paper, we present optimal circuit designs...
Improving the efficiency of upcoming thermoelectric (TE) materials and exploring their potential for various niche applications are among promising strategies addressing challenges that impede commercialization traditional TE materials. This work reports results efforts to improve performance recently optimized ZrFe0.4Ni0.6Sb double half-Heusler (DhH) by cobalt (Co) doping. The synthesized ZrFe0.4–yCoyNi0.6Sb samples exhibit phase separation into coherent biphasic DhH ZrNiSb phases with...
This study demonstrates a scalable approach for synthesizing Bi2Te3-xSexCuy (x=0, 0.4–0.8; y=0, 0.02) through Cu doping and Se substitution, using high-pressure hot-press sintering to mitigate performance degradation in large-scale production. Raw materials were processed 200 g batches, melted, compacted into 50-mm-diameter sintered disks under pressure of MPa. decreased carrier concentration electrical conductivity, but the enhanced Seebeck coefficient significantly improved power factor....
Enhanced phonon scattering and band structure engineering improve the thermoelectric properties of SnTe-based materials.
Pure GeTe shows inferior thermoelectric performance due to the large carrier concentration caused by intrinsic high of Ge vacancies. In this study, we report improved Bi and co-doped based material where a figure merit, ZT ∼ 1.7 at 623 K was realized through synergetic effect tuning concentration, resonant states, suppression thermal conduction. doping induces states in density near Fermi energy level. sharply reduces lattice conductivity formation extensive solid solution point defects....
Ongoing research and development focus on emerging thermoelectric materials with enhanced performance, continually making the possibility of waste heat recovery a reality. In this work, we engineer properties layered SnSb2Te4 topological insulators. To date, there is little reporting these as potential state-of-the-art materials. Thus, need to formulate effective strategies realize potential. Since are known have intrinsically low lattice thermal conductivity, shift our attention improving...
With the development of artificial intelligence, deep-learning-based cryptanalysis has been actively studied. There are many techniques. Among them, was performed to recover secret key used for cryptography encryption using known plaintext. In this paper, we propose a method based on state-of-art deep learning technologies (e.g., residual connections and gated linear units) lightweight block ciphers S-DES, S-AES, S-SPECK). The number parameters required training is significantly reduced by...
The role of mineral metabolism in mortality among dialysis patients has received increased attention, but some aspects remain unclear. aim the present study was to investigate prognostic value serum calcium and phosphate levels for all-cause cause-specific patients.Patients on hemodialysis peritoneal were enrolled from a multicenter prospective cohort Korea (NCT00931970). divided into low, normal, high groups according their baseline or levels. Cox proportional analysis hazards model...
Background The association of a higher body mass index (BMI) with better survival is well-known "obesity paradox" in patients on hemodialysis (HD). However, men and women have different compositions, which could impact the effect BMI mortality. We investigated gender obesity-mortality relationship Korean HD. Methods This study included 2,833 maintenance HD from multicenter prospective cohort Korea (NCT00931970). between categorized gender-specific mortality was evaluated by an adjusted Cox...