Publications by authors named "SeungHyun Lee"

In the rapidly evolving healthcare environment, radiologists strive to establish their rightful place. Thus, there is a need for enhanced outpatient and clinical education within the Department of Radiology and exploration of its methodologies. Accordingly, the Korean Society of Radiology established a task force to investigate the clinical and outpatient practice status of radiologists overseas, current state of related education, involvement of other specialties in radiologic practices and education in Korea, and clinical and outpatient practice status among Korean radiologists.

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The complete mitochondrial genome sequence of (J. E. Gray, 1850) was determined using next-generation sequencing.

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A new species of the genus Notodoma Lacordaire, 1854 (Coleoptera, Histeridae, Exosternini), Notodoma koreanum sp. nov., is described from Korea.

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The family Throscidae (Coleoptera: Elateroidea) is taxonomically reviewed from Korea. To date, the taxonomic study on Throscidae from Korea is insufficient, as only a single species has been reported in the fauna prior to this study. We newly recognized three species belonging to the genus Aulonothroscus, which is recorded for the first time from Korea.

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Retained medullary cord (RMC) is a recently defined term denoting closed spinal dysraphism arising from the failure of regression in secondary neurulation. Despite the acknowledgment of this condition, there needs to be more literature elucidating the radiologic manifestations of RMC. This study aimed to describe the MR imaging findings of RMC.

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The Asian longhorned beetle (ALB), Anoplophora glabripennis (Motschulsky), is a polyphagous woodboring beetle that infests and damages hardwood host trees in Asia, Europe, and North America. Native to China and the Korean peninsula, ALB is invasive in both North America and Europe. Due to the large environmental and economic impacts associated with ALB, much effort has been placed on its management and eradication from invaded areas.

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  • To improve sensitivity in elastomers used for pressure sensors, pores were added to their structure, allowing for better thickness adjustment in response to external pressure changes.
  • The size, density, and distribution of these pores were controlled by emulsifying polydimethylsiloxane (PDMS) and water, achieving a significant increase in sensitivity under low-pressure conditions—a tenfold improvement over non-porous PDMS.
  • The effectiveness of this porous PDMS was demonstrated through experiments that detected dynamic loads on objects and monitored human heartbeats, showcasing its potential for practical pressure sensing applications.
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Background: The adoption of information and communication technology (ICT) has been the fastest and most widespread in the South Korean workplace. While ICT has several advantages, it can also cause stress among workers. However, the relationship between the introduction of ICT in the workplace and mental health problems among Korean workers remains unclear.

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  • The study aimed to investigate the origins of prostatic arteries (PAs) in Korean men and compare findings with existing literature.
  • A total of 108 male patients with urinary issues underwent prostatic artery embolization (PAE), and their artery anatomy was categorized using established systems.
  • Results showed that the most common prostatic artery origin was from the internal pudendal artery, followed by the superior vesical and obturator arteries, with the most prevalent internal iliac artery pattern being type A.
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The most recent breakthrough in state-of-the-art electronics and optoelectronics involves the adoption of steep-slope field-effect transistors (FETs), promoting sub-60 mV/dec subthreshold swing (SS) at ambient temperature, effectively overcoming "Boltzmann limit" to minimize power consumption. Here, a series integration of nanoscale copper-based resistive-filamentary threshold switch (TS) with the IGZO channel-based FET is used to develop a TS-FET, in which the turn-on characteristics exhibit an abrupt transition over five decades, with an extremely low SS of 7 mV/dec, a high on/off ratio (>10), and ultralow leakage current (40-fold decrease), ensuring excellent repeatability and device yield. Unlike previous device-centric studies, this work highlights potential circuit applications (logic-inverter, pulse-sensor amplification, and photodetector) based on TS-FET.

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Wastewater-based epidemiology has been used in pathogen surveillance for microorganisms at the community level. This study was conducted to determine the occurrence and trends of infectious pathogens in sewage from Yongin city and the relationships between these pathogens and the incidence of infectious diseases in the community. From December 2022 to November 2023, we collected inflow water from six wastewater treatment plants in Yongin city twice a month.

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  • Successful integration into social groups requires understanding each individual's status and the group's social rules.
  • A study using videos of macaques showed that viewers could accurately infer the social status of individuals based on their aggressive and appeasing behaviors.
  • The amygdala in viewers' brains signaled the status of both individuals in the interaction, indicating that social attention is influenced by the dominant individual, even without active displays.
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Current silicon-based CMOS devices face physical limitations in downscaling size and power loss, restricting their capability to meet the demands for data storage and information processing of emerging technologies. One possible alternative is to encode the information in a non-volatile magnetic state and manipulate this spin state electronically, as in spintronics. However, current spintronic devices rely on the current-driven control of magnetization, which involves Joule heating and power dissipation.

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  • Surgical occlusion of the left atrial appendage (LAA) during mitral valve surgery in patients with atrial fibrillation reduces the risk of thromboembolic events and all-cause death compared to preserving the LAA.
  • A study analyzed 237 patients with severe mitral regurgitation and found that those who had their LAA occluded experienced significantly fewer adverse outcomes over a follow-up of about 37 months.
  • Multivariate analysis confirmed that LAA occlusion linked to better outcomes, with significant improvements in reducing primary outcomes and thromboembolic events, suggesting it may be beneficial for AF patients undergoing mitral valve surgery.
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Water-repellent superhydrophobic surfaces are ubiquitous in nature. The fundamental understanding of bio/bio-inspired structures facilitates practical applications surmounting metastable superhydrophobicity. Typically, the hierarchical structure and/or reentrant morphology have been employed hitherto to suppress the Cassie-Baxter to Wenzel transition (CWT).

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  • Atrial functional mitral regurgitation (AFMR) is characterized by normal heart function but involves an enlarged left atrium and dilated mitral valve, and there's no standardized treatment guideline for it yet.
  • A study analyzed 1435 patients who had mitral valve repairs, focusing on 162 with AFMR, and assessed outcomes like overall mortality and recurrence of mitral regurgitation (MR) over an average follow-up of 6.1 years.
  • Results showed high survival rates (86% at 5 years; 73% at 10 years) and significant reduction in MR recurrence after surgery, indicating that mitral valve repair is an effective treatment for AFMR.
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Purpose: To investigate the association of shift work and the risk for obstructive sleep apnea (OSA) with diabetes mellitus (DM), and the interaction effect of shift work and the risk for OSA on DM.

Methods: Data from the Korea National Health and Nutrition Examination Survey (KNHANES) 2019-2021 were used. The participants were 3012 employees aged 40 to 59 years.

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Nanobodies derived from camelids and sharks offer unique advantages in therapeutic applications due to their ability to bind to epitopes that were previously inaccessible. Traditional methods of nanobody development face challenges such as ethical concerns and antigen toxicity. Our study presents a synthetic, phagedisplayed nanobody library using trinucleotide-directed mutagenesis technology, which allows precise amino acid composition in complementarity-determining regions (CDRs), with a focus on CDR3 diversity.

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Electrocatalytic nitrate reduction reaction (NORR) presents an innovative approach for sustainable NH production. However, selective NH production is hindered by the multiple intermediates involved in the NORR process and the competitive hydrogen evolution reaction. Hence, the development of highly efficient NORR catalysts is paramount.

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Congenital lymphatic flow disorders collectively refer to a heterogeneous group of diseases that manifest as chylothorax, chylous ascites, intestinal lymphangiectasia, protein-losing enteropathy, and peripheral extremity or genital lymphedema, all in the absence of identifiable injury to the lymphatic system. We have only recently begun to understand congenital lymphatic flow disorders through the ability to image lymph flow dynamically. Intranodal dynamic contrast-enhanced magnetic resonance lymphangiography (DCMRL) is a crucial technique for imaging lymphatic flow in pediatric patients with congenital lymphatic flow disorders.

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  • Successful integration into a social group relies on understanding the status and interaction rules among its members, which can be indicated through observed behaviors rather than physical traits.
  • A study using videos of macaque interactions found that viewers could accurately determine social status based on aggressive and appeasing gestures, with dominant individuals drawing more attention.
  • Neural activity in the amygdala of viewers reflected the social status of both individuals involved in the interactions, indicating that the brain processes status information for those being watched, whether they are attended to or not.
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Recent advancements in communication technology have catalyzed the widespread adoption of realistic content, with augmented reality (AR) emerging as a pivotal tool for seamlessly integrating virtual elements into real-world environments. In construction, architecture, and urban design, the integration of mixed reality (MR) technology enables rapid interior spatial mapping, providing clients with immersive experiences to envision their desires. The rapid advancement of MR devices, or devices that integrate MR capabilities, offers users numerous opportunities for enhanced entertainment experiences.

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This study presents a preliminary exploration into the effect of Korean Red Ginseng (KRG) on the cerebellum in individuals with cerebellar atrophy. Over a three month-long period, nine subjects received a 4.5g of KRG daily, with assessments including the ARS, ADAS-Cog, and FDG-PET/CT scans.

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species include Meyer, L., , , , and , which contain bioactive components (BCs) such as ginsenosides and polysaccharides. Recently, growing evidence has revealed the pharmacological effects of species and their BCs on allergic airway diseases (AADs), including allergic asthma (AA) and allergic rhinitis (AR).

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Homeostasis is a fundamental concept in biology and ensures the stability of life by maintaining the constancy of physiological processes. Recent years have witnessed a surge in research interest in these physiological processes, with a growing focus on understanding the mechanisms underlying social homeostasis. This shift in focus underscores our increasing understanding of the importance of social interactions and their impact on individual well-being.

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Synopsis of recent research by authors named "SeungHyun Lee"

  • - Seunghyun Lee's recent research spans diverse fields, including cardiovascular surgery, nanotechnology, wastewater epidemiology, and social behavior analysis, indicating a strong interdisciplinary approach.
  • - Notable findings include the clinical significance of left atrial appendage occlusion during mitral valve surgery for atrial fibrillation patients, alongside innovative developments in ultralow-power electronic devices utilizing subthermionic threshold switching technologies.
  • - The research also explores social status inference through observational behavior in macaques and the construction of synthetic nanobody libraries for therapeutic applications, showcasing a commitment to both applied and basic scientific inquiries.

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