Publications by authors named "JaeWon Choi"

Superconductivity in infinite-layer nickelates has stirred much research interest, to which questions regarding the nature of superconductivity remain elusive. A critical leap forward to address these intricate questions is through the growth of high-crystallinity infinite-layer nickelates, including the "parent" phase. Here, we report the synthesis of a high-quality thin-film nickelate, NdNiO.

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To address the ongoing demand for high-performance energy storage devices, it is crucial to identify new electrode materials. Lithium-ion batteries (LIBs) store energy via the electrochemical redox process, so their electrode materials should have reversible redox properties for rechargeability. On that note, redox-active metal complexes are explored as innovative electrode materials for LIBs.

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Mucins are key components of innate immune defense and possess remarkable abilities to manage pathogenic microbes while supporting beneficial ones and maintaining microbial homeostasis at mucosal surfaces. Their unique properties have garnered significant interest in developing mucin-inspired materials as novel therapeutic strategies for selectively controlling pathogens without disrupting the overall microbial ecology. However, natural mucin production is challenging to scale, driving the need for simpler materials that reproduce mucin's bioactivity.

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We have synthesized a new ion pair receptor (2) consisting of a cone-calix[4]arene bearing a combination of ethyl esters and ethers as a cation binding site and a calix[4]pyrrole subunit acting as an anion binding site. Ion pair receptor 2 complexes LiCl, NaCl, and CsCl among alkali metal chloride salts with distinct complexation modes and affinities in 10 % methanol-d in chloroform-d. For instance, relatively small Li and Na cations are bound to the oxygen atoms of the functionalized calix[4]arene lower rim with Cl being hydrogen bonded to the calix[4]pyrrole NHs while the larger Cs cation is bound to the cone-shaped calix[4]pyrrole cavity via a π-cation interaction.

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High-temperature superconductivity was discovered in the pressurized nickelate LaNiO which has a unique bilayer structure and mixed valence state of nickel. The properties at ambient pressure contain crucial information of the fundamental interactions and bosons mediating superconducting pairing. Here, using X-ray absorption spectroscopy and resonant inelastic X-ray scattering, we identified that Ni 3 , Ni 3 , and ligand oxygen 2p orbitals dominate the low-energy physics with a small charge-transfer energy.

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Article Synopsis
  • - The study compared open versus closed healing methods after alveolar ridge preservation (ARP) in dogs with damaged extraction sockets, using specific materials for the procedure.
  • - Results showed that the open group had quicker wound healing and maintained more keratinized tissue compared to the closed group, although the overall ridge dimensions and new bone formation were similar between both methods.
  • - In conclusion, while both healing approaches produced comparable outcomes in ridge dimensions and bone growth, open healing minimized buccal bone loss and enhanced keratinized tissue.
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To address the rapidly growing demand for high performance of lithium-ion batteries (LIBs), the development of high-capacity anode materials should focus on the practical perspective of a facile synthetic process. In this work, iron oxide nanoparticles (FeO NPs) in situ grown on the surface of reduced graphene oxide (rGO), denoted as FeO NPs@rGO, were prepared through a facile one-pot synthesis under the wet-colloidal conditions. The synthesized FeO NPs showed that uniform FeO NPs, with a size of around 9 nm, were distributed on the rGO surfaces.

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Microplastics (MPs), plastic particles smaller than 5 mm, are pervasive pollutants challenging wastewater treatment due to their size and hydrophobicity. They infiltrate freshwater, marine, and soil environments, posing ecological threats. In marine settings, MPs ingested by organisms cause cytokine release, cellular and DNA damage, and inflammation.

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With the growing interest in energy storage, significant research has focused on finding suitable anode materials for sodium-ion batteries (SIBs). While developing high-capacity nanosized metal sulfides, issues like low stability and rapid initial capacity decline are common. Instead of maintaining steady capacity, they also tend to exhibit an increase in discharge capacity as cycling continues.

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  • Natural language processing (NLP) is a part of AI aimed at helping computers understand text data, and while it's useful in critical care, it's not widely utilized in clinical research or quality improvement.
  • A scoping review was conducted, analyzing 87 studies from the past decade, primarily focused on using NLP to predict clinical outcomes like mortality and identify specific concepts in intensive care.
  • Most articles discussed the development of NLP algorithms, but very few covered real-world implementation, emphasizing the need for greater clinician awareness to enhance practical applications in healthcare settings.
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  • This study investigates the impact of personality traits on cardiovascular disease (CVD) risk in patients with type 2 diabetes mellitus (T2DM) using data from over 8,000 individuals followed for up to 13.6 years.
  • Key findings indicate that the personality trait of diligence is associated with a lower risk of several types of CVD, suggesting that more conscientious individuals may have better health outcomes.
  • Additionally, adopting healthy lifestyle behaviors, such as managing obesity and staying active, can further reduce CVD risk, regardless of one's level of diligence.
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How Cooper pairs form and condense has been the main challenge in the physics of copper-oxide high-temperature superconductors. Great efforts have been made in the 'underdoped' region of the phase diagram, through doping a Mott insulator or cooling a strange metal. However, there is still no consensus on how superconductivity emerges when electron-electron correlations dominate and the Fermi surface is missing.

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Structural degradation of oxide electrodes during the electrocatalytic oxygen evolution reaction (OER) is a major challenge in water electrolysis. Although the OER is known to induce changes in the surface layer, little is known about its effect on the bulk of the electrocatalyst and its overall phase stability. Here, we show that under OER conditions, a highly active SrCoO electrocatalyst develops bulk lattice instability, which results in the formation of molecular O dimers inside the bulk and nanoscale amorphization induced via chemo-mechanical coupling.

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Objective: Obesity is a key predictor of type 2 diabetes (T2D). However, metabolic complications are not solely due to increased BMI. We hypothesized that differences between genetically predicted BMI and observed BMI (BMI-diff) could reflect deviation from individual set point and may predict incident T2D.

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Strongly correlated materials respond sensitively to external perturbations such as strain, pressure, and doping. In the recently discovered superconducting infinite-layer nickelates, the superconducting transition temperature can be enhanced via only ~ 1% compressive strain-tuning with the root of such enhancement still being elusive. Using resonant inelastic x-ray scattering (RIXS), we investigate the magnetic excitations in infinite-layer PrNiO thin films grown on two different substrates, namely SrTiO (STO) and (LaAlO)(SrTaAlO) (LSAT) enforcing different strain on the nickelates films.

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Background: This study aimed to develop an instrument for assessing physical functioning among adults aged 50 years or older living in the community.

Methods: Based on a review of various national health surveys and cohort studies, a 144-item bank was constructed for assessing physical functioning. Focus group interviews were conducted among adults aged 50 years or older to investigate their level of understanding of 60 selected items, followed by a pretest of the items on a nationally representative sample (n=508).

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  • Women with a history of gestational diabetes mellitus (GDM) have a higher risk of developing type 2 diabetes (T2D), and researchers are exploring if genetic markers can enhance prediction of this risk.
  • The study analyzed data from 1,895 women across diverse backgrounds and found that those who developed T2D had higher polygenic risk scores (PRS), indicating a genetic predisposition for the disease.
  • Incorporating PRS into existing risk assessment models provided a slight improvement in predictive accuracy for T2D, suggesting that genetic information can be beneficial, although not drastically transformative.
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  • Antigen 43 (Ag43) proteins form a unique β-barrel structure on the outer membrane of Escherichia coli, but the mechanisms for their stability and function are still not fully understood.
  • This study focused on Ag43β-enhanced green fluorescent protein chimeras, particularly the Ag43β700 variant, to investigate the role of the α-helical linker domain in barrel assembly.
  • The findings revealed that Ag43β700 had improved surface display and provided insights into stable barrel folding and expression at the outer membrane, validated through various experimental methods.
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: This study examines the relationship between physical and mental function and frailty, independently and in conjunction with polypharmacy, among older adults. : This cross-sectional study consisted of 368 participants aged ≥60 years. The participants were categorized into either robust or frail groups using Fried's frailty phenotype.

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is the only that causes zoonotic disease among the that cause infection in humans. It is fatal due to its short asexual growth cycle within 24 h. Lactate dehydrogenase (LDH), an enzyme that catalyzes the final step of glycolysis, is a biomarker for diagnosing infection by spp.

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Objective: While most genetic variants of type 2 diabetes (T2D) are suggested to be associated with β-cell dysfunction cross sectionally, their association with the longitudinal change of β-cell function remains largely unknown.

Research Design And Methods: We analyzed data from 6,311 participants without T2D at baseline (mean [SD] age 51.6 [8.

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Malaria is one of the most prevalent diseases worldwide with high incidence and mortality. Among the five species that can infect humans, morphologically resembles , resulting in misidentification and confusion in diagnosis, and is responsible for malarial disease relapse due to the formation of hypnozoites. receives relatively less attention compared to other major parasites, such as and , primarily due to its lower pathogenicity, mortality rates, and prevalence rates.

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Objective: The purpose of this study was to evaluate the positive impact of mobile neurofeedback (MNF) in neurotypical children compared to sham mobile neurofeedback.

Methods: Neurotypical children aged 10-15 participated in the study. All subjects were assessed using the Kiddie Schedule for Affective Disorders and Schizophrenia Present and Lifetime Version Korean Version (K-SADS-PL-K) and confirmed to have no psychiatric symptoms.

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