Jun‐Hyun Park

NH3-enhanced formation mechanism of highly oxygenated organic molecules from the photooxidation of aromatic and biogenic volatile organic compounds

Seong Weon Lee, Geondo Park, Jun‐Hyun Park, Fawad Ashraf et autres

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Volatility and Atomic Ratio of Aromatic Secondary Organic Aerosol: Effects of Aging and Alkyl Substituents

Ho‐Jin Lim, Jun‐Hyun Park, Atta Ullah, Seonghyun Kim

Vaporization enthalpy (ΔHv) is an essential thermodynamic parameter that governs the phase transitions of organic compounds, linking their volatility to their temperature-dependent gas–particle partitioning. Secondary organic aerosol (SOA) was produced by the photooxidation of aromatic volatile organic compounds (VOCs) using a newly …

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30‐1: Development of High‐integration HOP Panel with High‐frequency & VRR Driving

Hyeongseok Kim, Jun‐Hyun Park, Minjae Jeong, Jangmi Kang et autres

We proposed a new high‐resolution (~500ppi) pixel circuit capable of driving a variable frequency of 240Hz, which remains a vacant technology in the industry. In order to realize high‐speed operation and high‐resolution HOP panel, a panel was manufactured by combining new Stacked …

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In-situ measurement of secondary aerosol formation potential using a flow reactor: Livestock agricultural area

Fawad Ashraf, Ahsan Ali, Jun‐Hyun Park, Joonwoo Kim et autres

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Development and Evaluation of an Inexpensive Weighing Chamber for Particulate Filters

Jun‐Hyun Park, Ho‐Jin Lim

Exponential NMS : A New NMS Method for Suppression of Overlapped Bounding Box in Detection of Steel Surface Defects

Seonghwan Kang, Yo-Seob Shin, Se-Hun Lee, Jun‐Hyun Park et autres

최근 스마트 팩토리에서 제품 생산성을 향상시키기 위해, 딥러닝(Deep Learning)을 활용한 금속 외관의 결함 탐지 모델을 도입하는 사례가 증가하고 있다. 그러나 금속 외관에서 결함탐지를 진행할 시, 모델이 바운딩 박스(BBox:Bounding Box)를 중첩해서 예측하는 경우가 빈번히 발생한다. 일정 비율 이상 중첩된 바운딩 박스를 억제하는 비 …

A Study on the Insulation Effect of EMI Filter on the Power Supply of Aircraft Display Equipment

Sung‐Hee Cho, Eun-Seon Jeon, Dae-Hyun Kim, Sunghun Kim et autres

본 논문에서는 항공기 디스플레이 장비의 전원부 절연성능을 보장하기 위한 EMI(Electromagnetic Interference) 필터 설계방안을 제시한다. 항공기 전자장비의 전도성, 방사성 잡음신호는 디스플레이 영상신호의 왜곡과 교란의 원인이 된다. 이러한 노이즈 억제를 위하여 EMI 필터 설계가 필요하다. 또한, 설계 시전원단 과 절연접지 사이의 충분한 절연내력을 확보하는 …

AMFM: AugMix-empowered FixMatch for High-Performing Semi-Supervised Classification of Metal Surface Defects

Yo-Seob Shin, ll-Min Kim, Seonghwan Kang, Se-Hun Lee et autres

최근 산업현장에서 딥러닝 모델을 활용하여 제품 결함 검사를 대체하려는 시도가 계속되고 있다. 일반적으로 딥러닝 모델을 학습하기 위해서는 많은 학습데이터와 라벨링 작업이 필요하고, 일부 산업현장에서는 비용과 노동력의 문제 등으로 인해 딥러닝 모델로 대체하는 데 어려움이 있다. 이러한 문제점을 해결하기 위해 본 논문에서는 FixMatch의 …

Ghostformer: A GhostNet-Based Two-Stage Transformer for Small Object Detection

Sijia Li, Furkat Sultonov, Jamshid Tursunboev, Jun‐Hyun Park et autres

In this paper, we propose a novel two-stage transformer with GhostNet, which improves the performance of the small object detection task. Specifically, based on the original Deformable Transformers for End-to-End Object Detection (deformable DETR), we chose GhostNet as the backbone to extract …

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TA-Unet: Integrating Triplet Attention Module for Drivable Road Region Segmentation

Sijia Li, Furkat Sultonov, Qingshan Ye, Yong Bai et autres

Road segmentation has been one of the leading research areas in the realm of autonomous driving cars due to the possible benefits autonomous vehicles can offer. Significant reduction of crashes, greater independence for the people with disabilities, and reduced traffic congestion on …

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Deep Learning-Aided Downlink Beamforming Design and Uplink Power Allocation for UAV Wireless Communications with LoRa

Yeong-Rok Kim, Jun‐Hyun Park, Jae‐Mo Kang, Dong-Woo Lim et autres

In this paper, we consider an unmanned aerial vehicle (UAV) wireless communication system where a base station (BS) equipped multi antennas communicates with multiple UAVs, each equipped with a single antenna, using the LoRa (Long Range) modulation. The traditional approaches for downlink …

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Determination of Volatility Parameters of Secondary Organic Aerosol Components via Thermal Analysis

Fawad Ashraf, Zaeem Bin Babar, Jun‐Hyun Park, Pham Duy Quang Dao et autres

To date, there are limited data on the thermal properties of secondary organic aerosol (SOA) components. In this study, we employed an experimental method to evaluate the physical properties of some atmospherically relevant compounds. We estimated the thermodynamic properties of SOA components, …

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