Publications by authors named "Kyung-Min Kim"

Fluorite-structured binary oxide ferroelectrics exhibit robust ferroelectricity at a thickness below 10 nm, making them highly scalable and applicable for high-end semiconductor devices. Despite this promising prospect, achieving highly reliable ferroelectrics still demands a significant thermal budget to form a ferroelectric phase, being a hurdle for their use in high-end complementary metal oxide semiconductor (CMOS) processing. Here, we report a robust ferroelectric behavior of an 8 nm-thick ZrO film deposited plasma-enhanced atomic layer deposition at 300 °C on a (002)-oriented Ru without any post-annealing process, demonstrating high compatibility with CMOS processing.

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Introduction: Carbon monoxide poisoning may result in various neurological injuries, including acute symptomatic seizures. We aimed to investigate the long-term risk of epilepsy and status epilepticus in patients with previous carbon monoxide poisoning.

Methods: The study population was derived from the National Health Insurance Service database of the Republic of Korea between 1 January 2002 and 31 December 2021.

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  • The gut microbiota significantly influences the immune system, and studies suggest that probiotics can positively modify gut microbiota composition.
  • A clinical trial tested HDB1258, a specific probiotic, on 71 participants to evaluate its effects on natural killer (NK) cell activity and gut microbiota changes over 8 weeks.
  • Results indicated that HDB1258 notably increased NK cell activity while promoting beneficial gut bacteria, suggesting its potential to enhance immune response and gut health.
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Melatonin is a bioactive molecule with an important role in plants responding to various abiotic and biotic stresses. This study aims to determine the role of melatonin in rice under salt stress. This study used a factorial completely randomized design.

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Fiber-reinforced polymers (FRPs), which are resistant to corrosion, are used as reinforcement material for concrete. However, the flexural behavior of concrete members reinforced with FRPs can vary depending on the properties of FRPs. In this study, the flexural behavior of one-way concrete slab specimens reinforced with a new grid-type carbon-fiber-reinforced polymer (CFRP) (carbon grid) manufactured by bonding pultruded CFRP strands to an adhesive was investigated.

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  • Chronotype is a measure of individual sleep preferences and behaviors, traditionally assessed using the lengthy Horne & Östberg Morningness-Eveningness Questionnaire (MEQ), which has been shortened to the reduced MEQ (rMEQ) for easier use.
  • The study evaluated the validity and reliability of the Korean version of the rMEQ by comparing its scores with those from the original MEQ and the Munich Chronotype Questionnaire (MCTQ) in a sample of 3,030 individuals.
  • Results showed a strong positive correlation between the rMEQ and MEQ scores, along with significant negative correlations with sleep midpoint data from the MCTQ, confirming the rMEQ’s effectiveness as a valid and reliable tool
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Status epilepticus (SE), a continuous and self-sustaining epileptic seizure lasting more than 30 min, is a neurological emergency that can cause severe brain injuries and increase the risk for the development of epilepsy. Over the past few decades, accumulating evidence has suggested the importance of brain inflammation in the pathogenesis of epilepsy. Honokiol (HNK), a pharmacological activator of sirtuin 3 (SIRT3), is a bioactive compound extracted from the bark or leaves of Magnolia plants that possesses therapeutic benefits for preventing the development of inflammatory injury.

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  • A resurgence of Mycoplasma pneumoniae (MP) infections, mainly causing pneumonia in kids, was noted after the COVID-19 pandemic, leading to a study on its clinical features and treatment in late 2023.
  • Out of 474 patients screened, 374 met criteria for MP pneumonia, with most presenting fever and a common radiological sign being lobar consolidation, while macrolide resistance was high at 87%.
  • The study underscores the challenge of treating MP pneumonia due to high macrolide resistance rates, as these antibiotics, along with corticosteroids, are still frequently used despite their ineffectiveness in improving radiological outcomes.
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  • Delirium occurs in up to 50% of patients after high-risk surgeries and can negatively impact long-term health outcomes; the study aimed to use machine learning to predict this condition using sleep data from polysomnography (PSG) and questionnaires.
  • Researchers analyzed data from 912 adults who had surgeries under general anesthesia, identifying key risk factors for delirium such as medication use, surgery duration, and sleep issues like REM episodes and daytime sleepiness.
  • The machine learning model showed strong predictive capabilities, achieving an AUC of 0.84 when combining clinical and PSG data, emphasizing the importance of sleep-related factors in identifying patients at risk for delirium post-surgery.
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The negative impacts of soil salinization on ion homeostasis provide a significant global barrier to agricultural production and development. Plant physiology and biochemistry are severely affected by primary and secondary NaCl stress impacts, which damage cellular integrity, impair water uptake, and trigger physiological drought. Determining how transcriptional factors (TFs) and hormone networks are regulated in plants in response to salt stress is necessary for developing crops that tolerate salt.

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In the face of escalating environmental challenges driven by human activities, the quest for innovative solutions to counter pollution, contamination, and ecological degradation has gained paramount importance. Traditional approaches to environmental remediation often fall short in addressing the complexity and scale of modern-day environmental problems. As industries transition towards sustainable paradigms, the exploration of novel materials and technologies becomes crucial.

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Rationale And Objectives: The role of MR imaging in patients with cognitive impairment is to evaluate each component of Alzheimer's disease (AD), small vessel disease (SVD), and glymphatic function. We want to validate the diagnostic performance of the comprehensive interpretation of these parameters to predict the cognitive impairment stage. MATERIALS AND METHODS: This retrospective single-center study included 359 patients with cognitive impairment who had undergone MRI (FLAIR, T2WI, 3D-T1WI, susceptibility-weighted imaging, and diffusion tensor imaging [DTI]) and a neuropsychological screening battery between January 2020 and July 2022.

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Juvenile myoclonic epilepsy (JME) is a common adolescent epilepsy characterized by myoclonic, generalized tonic-clonic, and sometimes absence seizures. Prognosis varies, with many patients experiencing relapse despite pharmacological treatment. Recent advances in imaging and artificial intelligence suggest that combining microstructural brain changes with traditional clinical variables can enhance potential prognostic biomarkers identification.

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Objective: Although Republic of Korea is an advanced country in medical technology with a successful treatment rate for serious diseases, such as cancer, and has improved technology for highly difficult surgery, many excellent medical doctors and physicians are struggling due to the recent unreasonable medical environment. Specialization in brain tumor surgery also faces challenges in Republic of Korea, including low financial incentives, legal threats, and limited career prospects. In response, the Korea Brain Tumor Society (KBTS) formed the Future Strategy Committee to assess these obstacles and propose solutions.

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  • Stacking semiconductor chips enhances packing density and efficiency, leading to better performance, speed, and lower power usage.
  • Traditional Cu to Cu direct bonding (CCDB) requires high temperatures above 250 °C to prevent oxidation, which limits its practical applications.
  • A new method using a 6 nm Ru layer allows for reliable bonding at temperatures as low as 200 °C, achieving strong connections and stability in extreme temperature cycles.
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The rice blast fungus poses a significant challenge to maintaining rice production. Developing rice varieties with resistance to this disease is crucial for its effective control. To understand the genetic variability of blast isolates collected between 2015 and 2017, the 27 monogenic rice lines that carry specific resistance genes were used to evaluate blast disease reactions.

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  • Calcinosis cutis has five types (dystrophic, metastatic, idiopathic, iatrogenic, calciphylaxis) and can be misdiagnosed as cancer, making management difficult.
  • A study of 7 patients, treated between 2013-2022, highlighted successful diagnoses and complete mass excisions without significant complications, leading to full recovery.
  • The use of imaging techniques (X-rays, ultrasound, CT, MRI) was crucial for accurate diagnosis and treatment, promoting safer, less invasive procedures and preventing recurrences.
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Background: Photoperiod sensitivity is among the most important agronomic traits of rice, as it determines local and seasonal adaptability and plays pivotal roles in determining yield and other key agronomic characteristics. By controlling the photoperiod, early-maturing rice can be cultivated to shorten the breeding cycle, thereby reducing the risk of yield losses due to unpredictable climate change. Furthermore, early-maturing and high-yielding rice needs to be developed to ensure food security for a rapidly growing population.

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The (Horváth) (Homoptera: Delphacidae) is a white-backed planthopper (WBPH) that causes "hopper burn" in rice, resulting in severe yield loss. Gamma-aminobutyric acid (GABA) is a well-known neurotransmitter that inhibits neurotransmission in insects by binding to specific receptors. In this study, we investigated the potential role of GABA in modulating rice resistance to WBPH and evaluated possible defense mechanisms.

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  • * A study found that heat-killed HDB7040 promotes cell growth similar to estrogen and helps manage symptoms in ovariectomized rats, reducing weight gain and improving bone health.
  • * The findings indicate that HDB7040 could be a safe alternative for alleviating menopausal symptoms by specifically regulating estrogen receptor beta (ERβ).
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Homomorphic encryption performs computations on encrypted data without decrypting, thereby eliminating security issues during the data communication between clouds and edges. As a result, there is a growing need for homomorphic encryption hardware (HE-HW) for the edges, where low power consumption and a compact form factor are desired. Here, a Pt/TaO/Mo metallic cluster-type memristors (Mo-MCM) characterized by the Mo as a mobile species, and its utilization for the HE-HW via a 1-trasistor-1-memristor (1T1M) array as a prototype HE-HW is proposed.

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  • Arsenic is a toxic heavy metal that impacts rice production, prompting research to find genetic traits that help rice seedlings tolerate arsenic toxicity.
  • The study identified 17 quantitative trait loci (QTLs) linked to arsenic tolerance and discovered eight candidate genes that are more active in resistant rice lines.
  • Future research will utilize CRISPR-Cas9 technology to edit these genes, aiming to create arsenic-resistant rice varieties to ensure food security in contaminated areas.
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