A5101533809- Optical Wireless Communication Technologies
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Radioactive element chemistry and processing
- Radioactivity and Radon Measurements
- Supercapacitor Materials and Fabrication
- Health and Wellbeing Research
- Radioactive contamination and transfer
- Electrokinetic Soil Remediation Techniques
- Semiconductor Lasers and Optical Devices
- Endometriosis Research and Treatment
- Graphite, nuclear technology, radiation studies
- Spacecraft Design and Technology
- Semiconductor materials and devices
- Estrogen and related hormone effects
- Geophysical Methods and Applications
- Endometrial and Cervical Cancer Treatments
- Grit, Self-Efficacy, and Motivation
- Sleep and related disorders
- Suicide and Self-Harm Studies
- Sleep and Work-Related Fatigue
- Healthcare Education and Workforce Issues
- Advanced optical system design
- Color Science and Applications
- Satellite Communication Systems
Gangnam Severance Hospital
2023-2025
Yonsei University
2019-2025
Korea Institute of Science and Technology
2024
Severance Hospital
2023
Korea Research Institute of Chemical Technology
2019-2021
Inha University
2012-2021
Samsung (South Korea)
2021
Korea Institute of Industrial Technology
2019
Sungkyunkwan University
2017-2019
Korea Atomic Energy Research Institute
2012-2013
(1) Background: Both long and short sleep durations have been associated with negative health outcomes, particularly in middle-aged older adults. To date, there has little research on the association between osteoarthritis. This study aimed to evaluate relationship duration radiographically confirmed osteoarthritis women. (2) Methods: included 5268 women aged ≥50 years from Korea National Health Nutrition Examination Survey. Sleep was categorized into four groups (≤5 h, 6 7⁻8 ≥9 h) using...
Abstract Exposure to PM2.5 (particulate matter <2.5 μm) has been implicated in increasing the risk of endometriosis and worsening its symptoms. However, molecular mechanisms direct associations remain unclear. This study explored whether contributes onset or progression using vitro vivo models. Endometrial (EM) cells from women without were cultured second passages (P2) with exposure at a concentration 200 µg/mL (N = 5 for each group). Z-stack confocal imaging confirmed PM...
Free-space optical (FSO) communication has been studied for next-generation network systems. Because an FSO system establishes point-to-point links, maintaining alignment among the transceivers is a critical challenge. In addition, atmospheric turbulence causes significant signal loss in vertical links. Even clear weather conditions, transmitted signals suffer scintillation losses due to random variations. Thus, effect of should be considered this paper, we analyze relationship between...
Objectives: Formononetin is one of the phytoestrogens that functions like a selective estrogen receptor modulator (SERM). In this study, we evaluated effects formononetin on endometriosis progression in vitro and vivo. Materials methods: After pathological confirmation, 10 eutopic ectopic endometria were collected from patients with endometriosis. Ten samples who did not have To determine cytotoxic dose therapeutic formononetin, concentration 70% cells survived after administration was...
This study aimed to evaluate the endometrial transcriptomic patterns in early secretory phase (ESP) and mid-secretory (MSP) of natural menstrual cycle before vitro fertilization embryo transfer (IVF-ET).Thirty patients whose tissues were obtained from ESP or MSP a immediately IVF-ET included. Endometrial dating was histologically confirmed as (cycle days 16-18) 19-21), according noyes criteria. The divided into two groups depending on outcome: pregnant (n=14; 7 MSP) non-pregnant (n=16; 8...
A comparative study of doping aliovalent ions, Zr- or Al-, into Ni-rich Li(Ni,Co,Mn)O2 cathode materials is conducted in terms the electrochemical properties and chemical analysis, especially on surface region. The solubility composition for given sol-gel treatment matches well with computational results which infinitesimal Zr-coating identified as exhibiting increased charge capacity prolonged cycle life. Specifically, whole process can be understood by suppressed lithium-ion transfer...
We developed promising soft–rigid and free-standing composite electrolytes by mixing a Sr-doped LiZr2(PO4)3 compound with poly(ethylene oxide) (PEO)-based polymer for Li+-ion conductors. Using crystal formation modeling, we synthesized thermodynamically stable Li(Sr,Zr)2(PO4)3 the of via PEO-based in situ radical polymerization, which possessed good ionic conductivity (5.75 × 10–4 S cm–1). The cell Li/composite electrolyte/LiFePO4 showed capacity retention rate 80% after 100 cycles at room...
Little is known about the prevalence of depression diagnosis in Korea. We aimed to compare between Medical Aid and health insurance beneficiaries an outpatient setting The data patients who visited a medical institution for care 2015 were extracted from Health Insurance Review Assessment Service National Patient Sample claims database, those diagnosed with major depressive disorder, single episode (F32) or recurrent (F33), identified. adjusted odds ratio (aOR) 95% confidence interval (CI)...
Free space optical communication has attracted attention owing to its diverse advantages in satellite communication. However, requires high power overcome losses. This paper proposes a new modulation method that increases the 3 dB of on-off keying signal without adding additional bandwidth using single Mach-Zehnder delay interferometer (MZDI) and saturated erbium-doped fiber amplifier (EDFA) at transmitter. Owing average-limiting property EDFA, reducing effective duty cycle ratio peak output...
우라늄 오염토양을 동전기제염 시 많은 양의 동전기 침출액이 발생한다. 발생된 침출액을 재이용하기 위한 처리기술이 개발되었다. 우라늄침출액 내의 우라늄농도는 180 ppm이었고, Mg(II), K(I), Fe(II), Al(III) 농도는 20 ppm~1,210 ppm이었다. 우라늄침출액의 최적 처리공정은 혼합, 응집, 침전, 농축, 그리고 여과로 구성된다. 침전액의 pH를 11로 맞추기 위해, calcium hydroxide는 3.0g/100ml sodium 2.7g/100ml이 필요했다. 여러 침전실험 결과 NaOH+0.2g alum+0.15g magnetite가 여과를 침전혼합제로 선정되었다. magnetite 투입 침전입자의 평균크기는 <TEX>$600\;{\mu}m$</TEX>이었다. pH=9에서 침전 후 상등액에 총 금속농도가 가장 낮았기 때문에, 침전을 위하여 먼저 0.2g/100ml alum와 0.15g/100ml 투입한 pH=9일 때까지 hydroxide을...
Herein, nanopore-embedded CoMn2O4 microspheres were successfully synthesized, and their electrochemical behavior as an anode for lithium-ion batteries (LIBs) a catalyst oxygen-reduction/evolution reactions of lithium-air (LABs) cathodes was investigated. The electrodes composed specifically designed particles exhibited enhanced capacity retention with stable charge-transfer impedance change during the overall lithium conversion compared to conventional particulate nanoparticles. LAB...
For the next-generation wireless back-haul network, free space optical (FSO) communications are considered in non-terrestrial networks. The fading issues for atmospheric turbulence and misalignment become important to achieve high received power seamless data rate communications. spatial diversity technique could be solution mitigate these FSO systems with a few meters of distance between transmitters larger than coherence length. However, distant arrangement causes additional alignment...
The color ring phenomenon observed at a white LED with beam-spreading optics was numerically treated by angular spectrum analysis, and could be explained the incoincidence of emission points blue yellow lights.
For the first time, we systematically analyzed cause of gain degradation without physical damage in discrete III-V device and clarified that was overstress during componentization. In order to reproduce no failure condition, medium-level pulse ESD/EOS voltages or TLP currents were zapped at MMIC. Through TCAD simulation, part performance modeled mechanism together. It also confirmed heat generation position matched EMMI heating using TCAD. Meanwhile, after checking problematic point EMMI, DC...