A5046749364- Magnetic properties of thin films
- Theoretical and Computational Physics
- Topic Modeling
- Natural Language Processing Techniques
- Magnetic Properties and Applications
- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Multimodal Machine Learning Applications
- Multiferroics and related materials
- Autophagy in Disease and Therapy
- Natural product bioactivities and synthesis
- Cell death mechanisms and regulation
- Synthesis and biological activity
- Sentiment Analysis and Opinion Mining
- Sirtuins and Resveratrol in Medicine
- Magneto-Optical Properties and Applications
- Magnetic and transport properties of perovskites and related materials
- Advanced Sensor and Energy Harvesting Materials
- Plant chemical constituents analysis
- Bioactive Compounds and Antitumor Agents
- Neural Networks and Applications
- Quantum many-body systems
- Model Reduction and Neural Networks
- Cancer, Hypoxia, and Metabolism
- Characterization and Applications of Magnetic Nanoparticles
Korea Institute of Science and Technology
2019-2025
Korea University
2010-2025
Hyundai Motor Group (South Korea)
2024
University of Ulsan
2017-2023
Catholic University of Korea
2018-2022
Daegu Gyeongbuk Institute of Science and Technology
2022
Kyung Hee University
2012-2021
Stony Brook University
2015-2021
Eunpyeong Hospital
2021
St. Paul's Hospital
2018
Using spin-polarized low energy electron microscopy, we discovered a new type of domain wall structure in perpendicularly magnetized Fe/Ni bilayers grown epitaxially on Cu(100). Specifically, observed unexpected Néel-type walls with fixed chirality the magnetic stripe phase. Furthermore, find that is determined by film growth order being right handed and left Ni/Fe bilayers, suggesting underlying mechanism Dzyaloshinskii-Moriya interaction at interfaces. Our observations may open route to...
Abstract The cuticles of insects and marine crustaceans are fascinating models for man‐made advanced functional composites. excellent mechanical properties these biological structures rest on the exquisite self‐assembly natural ingredients, such as biominerals, polysaccharides, proteins. Among them, two commonly found building blocks in model biocomposites chitin nanofibers silk‐like proteins with β‐sheet structure. Despite being wholly organic, chitinous protein complex plays a key role by...
van der Waals (vdW) magnetic materials provide an ideal platform to study low-dimensional magnetism. However, observations of characteristics these layered truly distinguishing them from conventional thin film systems have been mostly lacking. In effort investigate properties unique vdW materials, we examine the exchange bias effect, a phenomenon emerging at ferromagnetic-antiferromagnetic interface. Exchange is observed in naturally oxidized ferromagnet Fe3GeTe2, owing antiferromagnetic...
Magnetic skyrmions are topologically nontrivial spin textures with envisioned applications in energy-efficient magnetic information storage. Toggling the presence of via writing/deleting processes is essential for spintronics applications, which usually require application a field, gate voltage or an electric current. Here we demonstrate reversible field-free at room temperature, hydrogen chemisorption/desorption on surface Ni and Co films. Supported by Monte-Carlo simulations, skyrmion...
This paper explores temporal variation in partisan effects on social spending growth OECD countries over the period 1971–2002. We argue that are jointly conditioned by globalization and mobilizational capacity of organized labour. present three main empirical findings. First, we show increased from mid-1970s to late 1980s then disappeared 1990s. Second, rose with 1970s early 1980s, a characterized rising labour strength many countries, but this is not true for post-1990 period, declining...
Abstract The purpose of this study was to evaluate whether obstructive sleep apnea (OSA)-related chronic intermittent hypoxia (CIH) influences lung cancer progression and elucidate the associated mechanisms in a mouse model cancer. C57/BL6 mice CIH group were exposed for two weeks after tumor induction compared with control (room air). Hypoxia inducible factor 1α (HIF-1α), vascular endothelial growth (VEGF) metastasis-related matrix metalloproteinases (MMP) measured. expression levels...
Harsh Trivedi, Heeyoung Kwon, Tushar Khot, Ashish Sabharwal, Niranjan Balasubramanian. Proceedings of the 2019 Conference North American Chapter Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long and Short Papers). 2019.
Abstract This paper presents an integrated power generation, conversion, and storage system with a temperature monitoring system, including passive near‐field communication (PGCS‐TMS‐pNFC), based on triboelectric nanogenerators (TENGs). The consists of three parts; first, mechanical regulation (MRS) kinematic design multiphase control; second, phase control rectifying circuit (PCRC) battery charging (BCC); third, data processing (TMS‐pNFC) for low consumption. MRS, consisting reel spring...
Although ursolic acid isolated from Oldenlandia diffusa (Rubiaceae) was known to have anticancer activities in prostate, breast and liver cancers, the underlying mechanism of ovarian cancer cells not investigated so far. In present study, apoptotic elucidated SK-OV-3 by 2,3-bis(2-methoxy-4-nitro-5-sulphophenyl)-2H-tetrazolium-5-carboxanilide (XTT) assay, cell cycle analysis Western blotting. Ursolic exerted cytotoxicity against A2780 with IC50 ca. 50 65 µM, respectively. Apoptotic bodies...
Chiral magnetic domain walls are of great interest because lifting the energetic degeneracy left- and right-handed spin textures in enables fast current-driven wall propagation. Although two types known to exist thin films, Bloch- Néel-walls, up now stabilization homochirality was restricted Néel-type walls. Since driving mechanism thin-film chirality, interfacial Dzyaloshinskii–Moriya interaction, is thought vanish Bloch-type walls, homochiral Bloch have remained elusive. Here we use...
Chiral spin textures in ultrathin films, such as skyrmions or chiral domain walls, are believed to offer large performance advantages the development of novel spintronics technologies. While in-plane magnetized films have been studied extensively media for current- and field-driven wall dynamics with applications memory logic devices, stabilization has remained rare. Here we report a phase structures an film system where out-of-plane orientations within walls stable. Moreover, while...
Deep learning can provide a better complementary link between the theoretical models and experimental results in magnetism.
Magnetism is a canonical example of spontaneous symmetry breaking. The magnetic state below the Curie temperature spontaneously broken even though Hamiltonian invariant under symmetry. Recently, machine learning algorithms have been successfully utilized to study topics in physics. We applied unsupervised find ground states Heisenberg model. A fully connected neural network was used generate spin configuration from randomly coded features, and energy selected as cost be minimized during...
Predicting how events induce emotions in the characters of a story is typically seen as standard multi-label classification task, which usually treats labels anonymous classes to predict. They ignore information that may be conveyed by emotion themselves. We propose semantics can guide model's attention when representing input story. Further, we observe evoked an event are often related: evokes joy unlikely also evoke sadness. In this work, explicitly model label via embeddings, and add...
<title>Abstract</title> Our study investigates the method to obtain topological properties of input images with neural networks, not requiring training datasets. In field solid-state physics, research has been conducted magnetic structures by analyzing spin fields. Utilizing approaches, our model generates a unit vector interpreted as fields from various and predicts Euler characteristic computing skyrmion number generated field. Even if networks are trained single image fixed...
Magnetic skyrmionic structures, including magnetic skyrmions and antiskyrmions, are characterized by swirling spin textures with non-trivial topologies. They featured specific topological charges, Q, which of crucial importance in determining their properties. Owing to the invariance chiral nature, it is generally believed that Q conserved a given structure hard alter. Here, we experimentally realize control structures at room temperature Dzyaloshinskii-Moriya interaction (DMI) platform...
Wound healing involves a complex series of coordinated events throughout the inflammatory, proliferative, and maturation phases tissue repair. Current treatment modalities lack device catering to all wound stages for recovery, angiogenesis epithelialization. Herein, we developed an integrated system with multiple functions self-electrical stimulation (ES), reactive oxygen species (ROS) regulation, bioactive metal-releasing patch (ERMP) address including hemostasis, inflammation,...