Hyeonju Jeong
A5060640330- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Radio Astronomy Observations and Technology
- SARS-CoV-2 and COVID-19 Research
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- SAS software applications and methods
- COVID-19 Clinical Research Studies
- Astronomy and Astrophysical Research
- Neutrino Physics Research
- Plant Taxonomy and Phylogenetics
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- SARS-CoV-2 detection and testing
- Plant Virus Research Studies
- Biosensors and Analytical Detection
- Earthquake Detection and Analysis
- COVID-19 and healthcare impacts
- Fluid Dynamics and Mixing
- COVID-19 and Mental Health
- RNA and protein synthesis mechanisms
- Infection Control and Ventilation
Sungkyunkwan University
2010-2024
Jeonbuk Agricultural Research & Extension Services
2022-2024
Seoul National University
2015-2022
Seoul National University Bundang Hospital
2020-2022
Gwangju Institute of Science and Technology
2021-2022
Gunma Industrial Technology Center
2022
Chonnam National University Hospital
2022
Gyeongsang National University Hospital
2022
Seoul National University Hospital
2022
Weatherford College
2021
The Telescope Array observatory utilizes fluorescence detectors and surface to observe air showers produced by ultra high energy cosmic rays in the Earth's atmosphere. Cosmic ray events observed this way are termed hybrid data. depth of shower maximum is related mass primary particle that generates shower. This paper reports on maxima data collected over 8.5 years using Black Rock Mesa Long Ridge conjunction with array detectors. We compare means standard deviations $X_{\mathrm{max}}$...
We report on a measurement of the cosmic ray energy spectrum by Telescope Array Low-Energy Extension (TALE) air fluorescence detector. The TALE detector is also sensitive to Cherenkov light produced shower particles. Low rays, in PeV range, are detectable as "Cherenkov Events". Using these events, we measure from low $\sim 2$ an greater than 100 PeV. Above can detect rays using fluorescence. This allows for extension energies few EeV. In this paper, will describe detector, explain technique,...
One of the uncertainties in interpretation ultrahigh energy cosmic ray data comes from hadronic interaction models used for air shower Monte Carlo (MC) simulations. The number muons observed at ground ray--induced showers is expected to depend upon model. may therefore test by comparing measured with MC prediction. In this paper, we present results studies muon densities extensive obtained analyzing signal surface detector stations which should have high purity. purity a station will on both...
In this paper we report the first close, high-resolution observations of downward-directed terrestrial gamma-ray flashes (TGFs) detected by large-area Telescope Array cosmic ray observatory, obtained in conjunction with broadband VHF interferometer and fast electric field change measurements parent discharge. The results show that TGFs occur during strong initial breakdown pulses (IBPs) few milliseconds negative cloud-to-ground low-altitude intracloud flashes, IBPs are produced a...
Abstract The objective of the study was to identify distinct patterns in inflammatory immune responses COVID-19 patients and investigate their association with clinical course outcome. Data from hospitalized were retrieved electronic medical record. Supervised k-means clustering serial C-reactive protein levels (CRP), absolute neutrophil counts (ANC), lymphocyte (ALC) used assign one three groups. Then, relationships between outcome assessed a discovery validation cohort. Unbiased analysis...
The dynamics of a large deformable bubble ( $\mathit{Re}\sim \mathit{O}(10^{3})$ ) rising near vertical wall in quiescent water is experimentally investigated. reference (without the wall) path considered two-dimensional zigzag. For range configurations (i.e. initial distance and boundary condition), using high-speed shadowgraphy, various behaviours such as periodic bouncing, sliding, migrating away, non-periodic oscillation without collisions are measured analysed. Unlike low-Reynolds-...
The results on ultrahigh-energy cosmic rays (UHECR) mass composition obtained with the Telescope Array surface detector are presented. analysis employs Boosted Decision tree (BDT) multivariate built upon 14 observables related to both properties of shower front and lateral distribution function. classifier is trained Monte-Carlo sets events induced by primary protons iron. An average atomic UHECR presented for energies $1{0}^{18.0}--1{0}^{20.0}\text{ }\text{ }\mathrm{eV}$. particles shows no...
Recently, the number of patients with coronavirus disease 2019 (COVID-19) who have tested positive for severe acute respiratory syndrome 2 (SARS-CoV-2), via reverse transcription polymerase chain reaction (RT-PCR) test, after recovery has increased; this caused a dilemma regarding medical measures and policies. We evaluated dynamics viral load anti-SARS-CoV-2 antibodies in four RT-PCR results recovery. In all patients, highest levels immunoglobulin G (IgG) IgM were reached about month onset...
We report on a measurement of the cosmic ray composition by Telescope Array Low-Energy Extension (TALE) air fluorescence detector (FD). By making use Cherenkov light signal in addition to from (CR) induced extensive showers, TALE FD can measure properties rays with energies as low $\sim 2$ PeV and exceeding 1 EeV. In this paper, we present results $X_{\rm max}$ distributions showers observed over energy range. Data collected period 4$ years was analyzed for study. The resulting are compared...
We evaluated the Standard Q COVID-19 Ag test for diagnosis of coronavirus disease 2019 (COVID-19) compared to reverse transcription-polymerase chain reaction (RT-PCR) test. applied both tests patients who were about be hospitalized, had visited an emergency room, or been admitted due confirmed by RT-PCR. Two nasopharyngeal swabs obtained; one was tested RT-PCR and other A total 118 pairs from 98 performed between January 5 11, 2021. The overall sensitivity specificity detecting severe acute...
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern have been emerging. However, knowledge temporal and spatial dynamics SARS-CoV-2 is limited. This study characterized evolution in immunosuppressed patients with long-term shedding for 73–250 days, without specific treatment. We conducted whole-genome sequencing 27 serial samples, including 26 samples collected from various anatomic sites two the first positive sample patient 2's mother. analysed intrahost...
Abstract The Pierre Auger Collaboration (Auger) recently reported a correlation between the arrival directions of cosmic rays with energies above 39 EeV and flux pattern 23 nearby starburst galaxies (SBGs). In this Letter, we tested same hypothesis using detected by Telescope Array experiment (TA) in 9 yr period from 2008 May to 2017 May. Unlike analysis, did not optimize parameter values but kept them fixed best-fit found Auger, namely 9.7% for anisotropic fraction assumed originate SBGs...
Abstract Motivated by the detection of a significant dipole structure in arrival directions ultra-high-energy cosmic rays above 8 EeV reported Pierre Auger Observatory (Auger), we search for large-scale anisotropy using data collected with surface detector array Telescope Array Experiment (TA). With 11 yr TA data, projection R.A. is fitted an amplitude 3.3% ± 1.9% and phase 131° 33°. The corresponding 99% confidence-level upper limit on 7.3%. At current level statistics, result compatible...
Abstract Evidence for a large-scale supergalactic cosmic-ray multiplet (arrival directions correlated with energy) structure is reported ultra-high-energy (UHECR) energies above 10 19 eV using 7 years of data from the Telescope Array (TA) surface detector and updated to years. Previous energy–position correlation studies have made assumptions regarding magnetic field shapes strength, UHECR composition. Here assumption tested that, because plane fit average matter density local structure,...
The "Lomonosov" space project is lead by Lomonosov Moscow State University in collaboration with the following key partners: Joint Institute for Nuclear Research, Russia, of California, Los Angeles (USA), Pueblo (Mexico), Sungkyunkwan (Republic Korea) and Russian industry organizations to study some extreme phenomena related astrophysics, astroparticle physics, biology. primary goals this experiment are study: This paper directed towards general description both scientific equipment on board...
Ultrahigh energy cosmic rays provide the highest known source in Universe to measure proton cross sections. Though conditions for collecting such data are less controlled than an accelerator environment, current generation ray observatories have large enough exposures collect significant statistics a reliable measurement energies above what can be attained laboratory. Cosmic measurements of section use atmospheric calorimetry depth air shower maximum (${X}_{\mathrm{max}}$), which is related...
The STANDARD™ M10 severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) assay (M10 assay) (SD Biosensor Inc., Suwon, Korea) is a rapid, fully-automated, cartridge-type molecular diagnostic that detects SARS-CoV-2 RNA using primers and probes for each target gene (ORF1ab gene, E gene). This study evaluated its performance by assessing concordance with the approved real-time PCR assay. Tests were performed on 80 nasopharyngeal samples. sensitivity specificity of 100%. effectively...
We describe the overall characteristics and performance of an optical CCD camera system, Camera for QUasars in EArly uNiverse (CQUEAN), which is being used at 2.1 m Otto Struve Telescope McDonald Observatory since 2010 August. CQUEAN was developed follow-up imaging observations red sources such as high redshift quasar candidates (z >= 5), Gamma Ray Bursts, brown dwarfs, young stellar objects. For efficient objects, has a science with deep depletion chip boasts higher quantum efficiency 0.7 -...
Circulating tumor DNA (ctDNA) is a promising biomarker for early detection and minimal residual disease (MRD) assessment in early-stage cancer, but quantifying minute amounts of ctDNA challenging well-designed studies on cancer are still lacking. Here, we adapted sensitive next-generation sequencing (NGS) technology performed parallel analysis pre- postoperative matched tissues prospective cohort patients with resectable pancreatic ductal adenocarcinoma (PDAC).In total, 70 consecutive...
Telescope Array (TA) is the largest experiment in Northern Hemisphere studying ultrahigh energy cosmic rays. TA measurements of ray spectrum using surface detector have best statistical power experiment, and observe ankle high cutoff. When data are divided into two declination bands, above below 24.8 degrees, cutoff appears at $10^{19.64 \pm 0.04}$ ($10^{19.84 0.02}$) eV lower (higher) band, an difference 58\%. The global significance 4.3 standard deviations. lack instrumental cause this...
Abstract This paper presents data on the simultaneous and complementary observations of gamma-ray burst (GRB) GRB 161017A for optical, X-ray, gamma wavelengths obtained by Russian multi-messenger Lomonosov space observatory supplemented additional from Swift satellite as well ground-based MASTER Global Robotic Net 10 m Gran Telescopio Canarias. Multifrequency spectra this very powerful explosion indicate that it originated at a distance billion light years Earth. Here, we present results...
An intermediate-scale energy spectrum anisotropy has been found in the arrival directions of ultra-high cosmic rays energies above $10^{19.2}$ eV northern hemisphere, using 7 years data from Telescope Array surface detector. A relative distribution test is done comparing events inside oversampled spherical caps equal exposure, to those outside, Poisson likelihood ratio. The center maximum significance at $9^h$$16^m$, $45^{\circ}$. and a deficit with $10^{19.2}$$\leq$$E$$<$$10^{19.75}$ an...