Publications by authors named "Jae-won Choi"

Background: Ulleungdo and Dokdo, located in the East Sea, are volcanic islands with high ecological value due to their unique biodiversity. Although research on the insect fauna on these two Islands has been conducted from the early 19 century to recent times, limitations exist due to several issues, including misidentifications and historical errors. This study addresses these issues by conducting a comprehensive insect survey from 2020 to 2023, re-identifying misidentified specimens and compiling references to create an updated and accurate checklist of insect species for Ulleungdo and Dokdo.

View Article and Find Full Text PDF

The ever-growing demand for reducing costs and decreasing the time to market in today's plastics industry makes rapid tooling and rapid prototyping highly researched areas. Stereolithography (SLA)-manufactured injection mold inserts make it possible to produce prototype parts rapidly and cost-effectively. To utilize SLA in the injection molding industry, two steps have to be considered.

View Article and Find Full Text PDF
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.
View Article and Find Full Text PDF

Deep learning has shown great potential to automate abdominal organ segmentation and quantification. However, most existing algorithms rely on expert annotations and do not have comprehensive evaluations in real-world multinational settings. To address these limitations, we organised the FLARE 2022 challenge to benchmark fast, low-resource, and accurate abdominal organ segmentation algorithms.

View Article and Find Full Text PDF

Iron rhodium (FeRh) undergoes a first-order anti-ferromagnetic to ferromagnetic phase transition above its Curie temperature. By measuring the anomalous Nernst effect (ANE) in (110)-oriented FeRh films on AlO substrates, the ANE thermopower over a temperature range of 100-350 K is observed, with similar magnetic transport behaviors observed for in-plane magnetization (IM) and out-of-plane magnetization (PM) configurations. The temperature-dependent magnetization-magnetic field strength (M-H) curves revealed that the ANE voltage is proportional to the magnetization of the material, but additional features magnetic textures not shown in the M-H curves remained intractable.

View Article and Find Full Text PDF
Article Synopsis
  • The study focuses on characterizing protein coronas formed on multi-walled carbon nanotubes (MWCNTs) coated with bovine serum albumin (BSA) to improve nanomedicine safety and efficiency.
  • It was found that varying BSA pretreatment concentrations affect cellular uptake rates and induce different biological responses in A549 cells, with significant findings revealed through advanced spectroscopic and spectrometric analyses.
  • Key findings include changes in the composition ratio of proteins based on BSA concentration, an increase in α-helix structure with higher BSA levels, and the activation of distinct biological pathways at different BSA concentrations, highlighting the important link between nano/bio-interface and cellular responses.
View Article and Find Full Text PDF

FeRh has been demonstrated to be an important material for the observation of magnetic phase transitions, such as the first-order transition from an antiferromagnetic (AFM) to a ferromagnetic (FM) state, in response to changes in the temperature. This is because of the magnetic moment induced in Rh atoms above the magnetic phase transition temperature. In the present study, we focus on the longitudinal spin Seebeck effect (LSSE), which involves the generation of spin voltage as a result of a temperature gradient in FM materials or FM insulators, and experimentally assess the effect of the crystalline quality of FeRh films and the properties of the substrate on the LSSE thermopower during the FM-AFM phase transition.

View Article and Find Full Text PDF
Article Synopsis
  • 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.
View Article and Find Full Text PDF
Article Synopsis
  • The study focuses on creating a cost-effective and accessible alternative to the traditional sleep apnea diagnostic method, polysomnography (PSG), using a deep learning model that analyzes radar data.
  • Researchers conducted a cohort study with 54 participants for model development and 35 for validation, utilizing a hybrid CNN-Transformer architecture and various evaluation metrics.
  • The results showed the model's effective event detection sensitivity and high correlation with traditional measures, suggesting the promising potential of radar sensors and AI in enhancing obstructive sleep apnea diagnosis.
View Article and Find Full Text PDF

Antigen 43 (Ag43) proteins, found on the outer membrane of Escherichia coli, are β-sheets that fold into a unique cylindrical structure known as a β-barrel. There are several known structural similarities between bacterial Ag43 autotransporters and physical components; however, the factors that stabilize the barrel and the mechanism for Ag43 passenger domainmediated translocation across the pore of the β-barrel remain unclear. In this study, we analyzed Ag43β-enhanced green fluorescent protein chimeric variants to provide new insights into the autotransporter Ag43β-barrel assembly, focusing on the impact of the α-helical linker domain.

View Article and Find Full Text PDF

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.

View Article and Find Full Text PDF

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.

View Article and Find Full Text PDF

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.

View Article and Find Full Text PDF
Article Synopsis
  • A novel auxetic structure for airless tire spokes is created using a primitive-type triply periodic minimal surface (P-TPMS) to increase stiffness when subjected to compressive forces.
  • A new rotated primitive-type auxetic structure (RPAS) is developed based on a parametric study, showing better deformation characteristics compared to traditional honeycomb spokes in airless tires.
  • Tests reveal that RPAS tires offer greater stability and shock absorption, while also being feasible for production using rubber-based additive manufacturing techniques for the tire industry.
View Article and Find Full Text PDF

is a salt-tolerant euryhaline mosquito that lays its eggs in rock pools. Although it is a pest that can transmit flaviviruses and filarial worms to humans, ecological studies have not been previously conducted because of its limited habitat. However, rising sea levels have created a more favorable environment for , increasing the risk of -borne diseases.

View Article and Find Full Text PDF

Coronary artery fistula (CAF) is characterized as a congenital or acquired abnormal communication between a coronary artery and any of the four chambers of the heart (coronary-cameral fistula) or great vessels (coronary arteriovenous fistula) bypassing the capillaries within myocardium. CAF is a rare disease, challenging to diagnose and treat depending on the anatomical location and type of the fistula and accompanying diseases. This study aims to report a case with multiple coronary artery to coronary sinus (CS) fistulas with giant left circumflex artery and multivalvular infective endocarditis.

View Article and Find Full Text PDF

Grown evidence has shown that the liver and reproductive organs were the main target organs of perfluorooctanoic acid (PFOA). Herein, we studied a toxic mechanism of PFOA using HeLa Chang liver epithelial cells. When incubated with PFOA for 24 h or 48 h, cell proliferation was inhibited in a concentration- and time-dependent fashion, but interestingly, the feature of dead cells was not notable.

View Article and Find Full Text PDF
Article Synopsis
  • A study was conducted to evaluate if deep learning (DL) techniques in a specialized liver MRI method called CAIPIRINHA-VIBE could enhance image quality, visibility of lesions, and their detection compared to the standard approach.
  • The research involved 168 patients and assessed both standard and DL CAIPIRINHA-VIBE images, with independent evaluations by three radiologists on various image aspects and statistical analyses for comparison.
  • Results showed that DL and high-resolution DL (HR-DL) techniques provided better image quality and quicker scans, with HR-DL significantly improving the detection rates of small liver lesions when compared to the standard method.
View Article and Find Full Text PDF
Article Synopsis
  • Aerobic exercise is shown to help preserve memory and cognition during aging, but the exact mechanisms behind its benefits are still unclear.
  • In a study with mice, aerobic training improved memory and reduced cognitive deficits by increasing the expression of proteins linked to neuroprotection and antioxidants while inhibiting neuroinflammation.
  • The research suggested that the protein FNDC5, associated with irisin, plays a vital role in reducing inflammation in microglial cells, which may contribute to enhanced cognitive function in exercise-trained mice.
View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to assess the reliability and validity of shortened versions of the Insomnia Severity Index (ISI) using item response theory (IRT) and Rasch analysis in a Korean population.
  • Two studies were conducted, one involving exploratory factor analysis and the second confirmatory factor analysis, both indicating that the ISI model fits well with strong internal consistency in reliability.
  • The findings suggest that the 2-factor shortened ISI is an effective tool for measuring insomnia severity, but further research is necessary in clinical populations.
View Article and Find Full Text PDF

Retinal detachment and other vision-threatening disorders often necessitate vitreous body removal and tamponade injection for retina stabilization. Current clinical tamponades such as silicone oil and expansile gases have drawbacks, including patient discomfort and the need for secondary surgery. We introduce a transparent alginate-phenylboronic acid/polyvinyl alcohol composite hydrogel (TALPPH) as a novel vitreous substitute with tamponading capabilities.

View Article and Find Full Text PDF

This study employs computational chemistry to investigate the electronic properties of halide perovskite materials, focusing on structural frameworks, elemental composition, surface engineering, and defect engineering. The tetragonal phase generally exhibits higher band gaps than the cubic phase due to conduction band differences, with LiPbCl showing the greatest band gap difference. The ionic radius of the A element influences band gaps for both phases, with Cs having the highest impact.

View Article and Find Full Text PDF

Objective: This study aimed to identify the factors affecting posttraumatic stress disorder (PTSD) symptom remission prospectively through a 1-year follow-up of sexual assault (SA) victims.

Methods: A total 65 female SA victims who visited the crisis intervention center were included. Self-administered questionnaires regarding PTSD symptoms and PTSD related prognostic factors were conducted at both recruitment (T1) and 1 year after recruitment (T2).

View Article and Find Full Text PDF

In principle, hybrid energy storages can utilize the advantages of capacitor-type cathodes and battery-type anodes, but their cathode and anode materials still cannot realize a high energy density, fast rechargeable capability, and long-cycle stability. Herein, we report a strategy to synthesize cathode and anode materials as a solution to overcome this challenge. Firstly, 3D nitrogen-doped hierarchical porous graphitic carbon (NHPGC) frameworks were synthesized as cathode materials using Co-Zn mixed metal-organic frameworks (MOFs).

View Article and Find Full Text PDF