A5101434622- Ammonia Synthesis and Nitrogen Reduction
- Machine Learning in Materials Science
- Catalytic Processes in Materials Science
- Organic Light-Emitting Diodes Research
- CO2 Reduction Techniques and Catalysts
- Crystal Structures and Properties
- Conducting polymers and applications
- Educational Systems and Policies
- Chemical Synthesis and Characterization
- Magnetic Properties and Applications
- Education and Learning Interventions
- Heusler alloys: electronic and magnetic properties
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Chemical Physics Studies
- Zeolite Catalysis and Synthesis
- Luminescence and Fluorescent Materials
- Innovative Educational Techniques
- Thermal Expansion and Ionic Conductivity
- Green IT and Sustainability
- Rock Mechanics and Modeling
- Nanopore and Nanochannel Transport Studies
- Shape Memory Alloy Transformations
- Technostress in Professional Settings
- Anodic Oxide Films and Nanostructures
Kyungpook National University
2023-2025
Sogang University
2020-2024
Chonnam National University
2020-2024
Korea Advanced Institute of Science and Technology
2020-2024
Jeonbuk National University
2023
Seoul National University
2018-2020
Text-to-3D generation has shown rapid progress in recent days with the advent of score distillation, a methodology using pretrained text-to-2D diffusion models to optimize neural radiance field (NeRF) zero-shot setting. However, lack 3D awareness 2D destabilizes distillation-based methods from reconstructing plausible scene. To address this issue, we propose 3DFuse, novel framework that incorporates into models, enhancing robustness and consistency methods. We realize by first constructing...
The development of heterogeneous catalysts for tandem reactions remains a significant challenge practical applications, primarily due to the need multiple isolated catalytic sites. This study presents novel metal‐organic framework (MOF), Cu‐AIPA, formulated as Cu(AIPA)(DMF)2 (AIPA: 2‐amino isophthalic acid, DMF: N, N‐dimethylformamide). Cu‐AIPA integrates three distinct mechanisms: redox activity, Brønsted basicity, and Lewis acidity. structure features redox‐active Cu(II) centers basic...
A new homocyclic methylbenzyl naphthalene (MBN) compound has been developed as a novel liquid organic hydrogen carrier (LOHC) medium with high gravimetric storage capacity of 6.44 wt % and good dehydrogenation ability. According to the results theoretical calculations designed MBN, MBN media possesses one lowest enthalpies (<56 kJ molH2–1) among LOHC media. The Friedel–Craft alkylation reaction allows formation an regioisomeric mixture, which minimizes production cost for practical...
Biotite, a phyllosilicate mineral, possesses significant potential for cesium (Cs) adsorption owing to its negative surface charge, specific area (SSA), and frayed edge sites (FES). Notably, FES are known play an important role in the of Cs. The objectives this study were investigate Cs capacity behavior artificially weathered biotite identify mineralogical characteristics development eco-friendly geologically-based adsorbent. Through various analyses, it was confirmed that mainly formed by...
Abstract Designing robust blue organic light-emitting diodes is a long-standing challenge in the display industry. The highly energetic states of emitters cause various degradation paths, leading to collective luminance drops competitive manner. However, key mechanism operational has yet be elucidated. Here, we show that electron-induced reactions play critical role short lifetime diodes. Our control experiments demonstrate whole device can only explained when excitons and electrons exist...
ACE-Molecule (advanced computational engine for molecules) is a real-space quantum chemistry package both periodic and non-periodic systems. adopts uniform numerical grid supported by the Lagrange-sinc functions. provides density functional theory (DFT) as basic feature. specialized in efficient hybrid DFT wave-function calculations based on Kohn–Sham orbitals obtained from strictly localized exact exchange potential. It open-source oriented with flexible convenient development interface....
Transferable local pseudopotentials (LPPs) are essential for fast quantum simulations of materials. However, various types LPPs suffer from low transferability, especially since they do not consider the norm-conserving condition. Here we propose a novel approach based on deep neural network to produce transferable LPPs. We introduced generalized Kerker method expressed with represent pseudo-wavefunctions. Its unique feature is that all necessary conditions can be explicitly considered in...
Thermally activated delayed fluorescence (TADF) material has attracted great attention as a promising metal-free organic light-emitting diode with high theoretical efficiency. To accelerate the discovery of novel TADF materials, computer-aided design strategies have been developed. However, they clear limitations due to accessibility only few computationally tractable properties. Here, we propose TADF-likeness, quantitative score evaluate potential molecules based on data-driven concept...
Abstract An effective electrochemical reduction of nitrous oxide (N 2 O) is established by controlling solution compositions in this study. N O was electrochemically reduced varying solvent composition and supporting electrolytes (K SO 4 Na ) concentrations. The differences current density resistance were analyzed via linear sweep voltammetry (LSV) impedance spectroscopy (EIS), respectively, depending on conditions. UV‐Vis adopted to measure the solubility O. As a result, among conditions...
High-pressure synchrotron X-ray powder diffraction studies of smectite group minerals (beidellite, montmorillonite, and nontronite) reveal comparative volumetric changes in the presence different fluids, as pressure transmitting media (PTM) silicone oil distilled water for anhydrous hydrous environments at room temperature. Using PTM, all show gradual contraction unit-cell volumes atomistic interplane distances. They, however, abrupt collapse near 1.0 GPa under conditions due to hydrostatic...
<title>Abstract</title> The interest of noncollinear spin structures in magnetic multilayers has recently gained a lot spintronics due to the observation unique phenomena these systems. In coupled by Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction study interactions interest. this paper, we magnetization reversal two layers with different anisotropy directions RKKY interaction. We have chosen Pt/Co/Ru/Co<sub>40</sub>Fe<sub>40</sub>B<sub>20</sub> where Pt/Co show perpendicular and CoFeB an...
Synthetic mordenite is widely used as a molecular sieve, adsorbent, and catalyst. To enhance these functionalities, it crucial to understand the ion-exchange properties cation-exchange sites of zeolite. In this study, we analyzed structural changes in fully Cs-, Sr-, Cd-, Pb-exchanged by using synchrotron X-ray powder diffraction under ambient conditions. Rietveld structure refinement revealed that Cs+ cation predominantly located near 8-membered ring (8MR) due its low electronegativity...
Manipulating the surface chemistry of graphene is critical to many applications that are achievable by chemical functionalization. Specifically, tailoring spatial distribution functional groups offers more opportunities explore functionality using continuous changes in energy. To this end, careful consideration required demonstrate gradient on surfaces, and it necessary develop a technique pattern groups. Here, we through direct mechanochemical cleavage atoms from chemically functionalized...
As quantum chemical properties have a dependence on their geometries, graph neural networks (GNNs) using 3D geometric information achieved high prediction accuracy in many tasks. However, they often require geometries obtained from high-level mechanical calculations, which are practically infeasible, limiting applicability to real-world problems. To tackle this, we propose new training framework, GeoTMI, that employs denoising process predict accurately easy-to-obtain (corrupted versions of...
We report comparative structural changes of potassium-contained zeolite-W (K-MER, analogue natural zeolite merlinoite) and monovalent extra-framework cation (EFC)-exchanged M-MERs (M = Li+, Na+, Ag+, Rb+). High-resolution synchrotron X-ray powder diffraction study precisely determines that crystal symmetry MERs is tetragonal (I4/mmm). Rietveld refinement results reveal frameworks all are geometrically composed disordered Al/Si tetrahedra, bridged by linkage oxygen atoms. observe a...
This paper aimed to investigate the structural and chemical changes of Ag-natrolite (Ag16Al16Si24O80·16H2O, Ag-NAT) in presence different pressure transmitting mediums (PTMs), such as N2, O2 CH4, up ~8 GPa 250 °C using situ synchrotron X-ray powder diffraction Rietveld refinement. Pressure-induced insertion occurs two stages case N2 runs, opposed CH4 run. First unit cell volume runs are observed at 0.88(5) GPa, 1.05(5) 1.84(5) with increase 5.7(1)%, 5.5(1)% respectively. Subsequent appear...
Abstract Deep learning (DL) can be a useful approach to molecular applications such as the organic light‐emitting diode (OLED) development via high‐throughput virtual screening. Various representations have been proposed incorporate structures in DL methods. However, it is yet clear which one would better for accurate prediction of electronic properties. Here, we carried out comparative study on performance four widely used elucidate an optimal solution OLED materials. We implemented six...
The purpose of this study was to analyze a structure multicultural education studies by using co-word analysis. Data were 4,695 keywords from 1,685 studies. First, after refining, that occurred more than 15 times selected. Second, the selected keywords, co-occurrence matrix and cosine similarity made. Third, hierarchical cluster analysis network conducted. Results are as follows. 6 clusters classified area education; Language education(Cluster1), Teacher education(Cluster2), Intercultural...
이 연구는 2022 개정 초등 실과 교육과정에 신설된 ‘구조물과 건설’ 영역의 실제 수업에 도움을 줄 수 있는 프로젝트 학습 기반 기술 영역 프로그램 및 교수-학습 자료를 개발한 것이다. 수업 개발 후 D초등학교 5학년 1개 학급 25명을 대상으로 12시간 적용하였다. 학생평가 결과는 정량적 평가와 정성적 평가 2가지로 진행하였다. 평가는 기 반 건설 수업을 통해 학생들의 협력적 의사소통 능력에 변화가 있는지 확인하였다. 협 동심 설문지, 설문지로 구성된 능력 설문지를 사용하였다. 결과 중 협동심 평균 점수는 사전 검사 3.60에서 사후 3.64로 약간의 상승하였다. 능력은 3.70에서 로 3.85로 나타났다. 과정 교사의 관찰평가, 학생들이 작성한 학습지와 소감문 을 분석하였다. 학생 관찰 프로그램을 진행할수록 참여도가 적극적으로 변화되는 모습을 보였다. 대한 긍정적인 반응으로는 서로 탓하지 않기, 실패해도 다시 시도하기, 공동의 과제를 위해 협력하기, 함께 문제점 찾아...