Sang‐Min Lee

ORCID: 0000-0002-7832-8431
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Research Areas
  • Thin-Film Transistor Technologies
  • Structural Integrity and Reliability Analysis
  • Risk and Safety Analysis
  • ZnO doping and properties
  • Semiconductor materials and devices
  • Electrical and Bioimpedance Tomography
  • Advanced Vision and Imaging
  • Nanowire Synthesis and Applications
  • Microfluidic and Bio-sensing Technologies
  • Fatigue and fracture mechanics
  • Advanced Memory and Neural Computing
  • Distributed and Parallel Computing Systems
  • Dielectric materials and actuators
  • Ferroelectric and Negative Capacitance Devices
  • Computer Graphics and Visualization Techniques
  • Advanced Surface Polishing Techniques
  • Advanced Sensor and Energy Harvesting Materials
  • Embedded Systems and FPGA Design
  • Airway Management and Intubation Techniques
  • Multimedia Communication and Technology
  • Nuclear Engineering Thermal-Hydraulics
  • Inflammatory Biomarkers in Disease Prognosis
  • Colorectal Cancer Screening and Detection
  • Electrostatics and Colloid Interactions
  • Cloud Computing and Remote Desktop Technologies

Sungkyunkwan University
2005-2024

Samsung Medical Center
2003-2024

Jeonbuk National University
2022

Inje University Busan Paik Hospital
2011

Kwangju Christian Hospital
2003

Abstract Herein, a high‐quality gate stack (native HfO 2 formed on 2D HfSe ) fabricated via plasma oxidation is reported, realizing an atomically sharp interface with suppressed trap density ( D it ≈ 5 × 10 cm −2 eV −1 ). The chemically converted exhibits dielectric constant, κ 23, resulting in low leakage current (≈10 −3 A at equivalent oxide thickness ≈0.5 nm. Density functional calculations indicate that the atomistic mechanism for achieving possibility of O atoms replacing Se interfacial...

10.1002/adma.202312747 article EN cc-by Advanced Materials 2024-03-26

In this work, we introduce liquid metal patterned stretchable and soft capacitive sensor with enhanced dielectric properties enabled by graphite nanofiber (GNF) fillers dispersed in polydimethylsiloxane (PDMS) substrate. We oxidized gallium-based that exhibited excellent wetting behavior on the surface of composites to enable patterning electrodes a facile stencil printing. The fluidic electrode modulated composite (

10.3390/polym14040710 article EN Polymers 2022-02-12

Lateral displacement of blood cells occurred when they were passed over a planar interdigitated electrode array placed at an angle to the direction flow, and was determined be function cell size. A simplified line charge model used estimate numerically lateral displacement. Based on size-specific displacement, dielectrophoretic (DEP) microseparator developed measure size distribution using fluorescence microscopy. To determine whether DEP useful, it detect acute leukemia by measuring cells....

10.1039/c1lc20413k article EN Lab on a Chip 2011-01-01

In this paper, we propose a novel mechanism for the Vth shift of amorphous-indium gallium zinc oxide (a-IGZO) thin film transistors under negative bias illumination stress (NBIS). Three kinds IGZO TFTs with different gate dielectricsand valence band offsets (VBO) were used in experiment. Gate dielectric materials Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> , HfO and SiO ....

10.1109/led.2020.2981176 article EN IEEE Electron Device Letters 2020-03-16

Abstract The integration of artificial spiking neurons based on steep‐switching logic devices and synapses with neuromorphic functions enables an energy‐efficient computer architecture that mimics the human brain well, known as a neural network (SNN). 2D materials impact ionization or ferroelectric characteristics have potential for use in such devices. However, research remains limited investigations far more common. An innovative neuron is implemented using WSe 2 transistor (I FET), while...

10.1002/adma.202406970 article EN Advanced Materials 2024-09-05

We present an efficient ray-tracing technique to render bokeh effects produced by parametric aspheric lenses. Contrary conventional spherical lenses, lenses do generally not permit a simple closed-form solution of ray-surface intersections. propose numerical root-finding approach, which uses tight proxy surfaces ensure good initialization and convergence behavior. Additionally, we simulate mechanical imperfections resulting from the lens fabrication via texture-based approach. Fractional...

10.1111/cgf.12953 article EN Computer Graphics Forum 2016-07-01

The risk of prostate cancer (PCa) in imaging reporting and data system version 2 (PI-RADSv2) score-3 lesions is equivocal; it regarded as an intermediate status presented PCa. In this study, we evaluated the clinical utility health index (PHI) for diagnosis PCa clinically significant (csPCa) patients with PI-RADSv2 lesions. study cohort included who underwent a transrectal ultrasound (TRUS)-guided, cognitive-targeted biopsy between November 2018 April 2021. Before biopsy, prostate-specific...

10.3390/cancers14174174 article EN Cancers 2022-08-29

We fabricated and evaluated solution-based double-channel thin-film transistors (TFTs) that consisted of an indium–zinc oxide (IZO) front layer indium–gallium–zinc (IGZO) back channel with the addition hydrogen peroxide (H 2 O ). The devices showed superior electrical properties regard to saturation mobility (12.9 cm /V·s), on-off ratio (5 × 10 7 ), subthreshold swing (0.21 V/decade). All were subjected under bias illumination stress for reliability assessment. threshold voltage shift...

10.1166/jnn.2020.18760 article EN Journal of Nanoscience and Nanotechnology 2020-06-30

The American Petroleum Institute guideline provides a methodology for calculating the risks of equipments installed in refineries or petrochemical plants. However, especially connection with consequence analysis, there are limitations its direct application to plant. As principal cause, only representative material is recommended risk evaluation while equipment contains numerous materials. objectives this paper propose an enhanced risk-based inspection (RBI) method resolve above shortcomings...

10.1115/1.2218350 article EN Journal of Pressure Vessel Technology 2005-07-01

Digital Rights Management (DRM) technologies allow content owners to protect their rights from illegal use of the digital contents (e.g., duplicating electrical resources). DRM have commonly been used in electronically published books (e-books) industry. In this paper, we introduce a general framework that can bypass protection deployed on e-book applications Android. To demonstrate feasibility proposed approach, applied our approach three popular (Kyobo Book Center, Ridibooks e-book,...

10.1109/icoin.2018.8343109 article EN 2022 International Conference on Information Networking (ICOIN) 2018-01-01

Recently, due to the rapid development on mobile hardware, it is required extend software environment execute not only native or application platforms (BREW, WIPI, etc.) based applications but also other that are similar with those of smartphones PCs. However, these often too heavy and complex. Thus, running in phone suitable because most handset has limited resources such as CPU performance, memory small display size. In addition, device its own RTOS, reusability migration various...

10.1109/ncm.2008.210 article EN 2008-09-01

The importance of the virtualization in embedded computing area is currently emerging. can enhance system flexibility by enabling concurrent execution an application OS and a real-time (RTOS) on same processor. L4 microkernel be used as efficient hypervisor which provides environment for operating systems virtualization. In order to run OSes microkernel, should adapted. source code Linux kernel readily accessed modified. Hence, chosen virtualized systems. this paper, architecture based proposed.

10.1109/ncm.2008.165 article EN 2008-09-01

We investigated the relationship between body mass index (BMI), radiological composition, and survival outcomes in patients with metastatic renal cell carcinoma (mRCC) underwent first-line immune checkpoint inhibitor (ICI)-based therapy.

10.2147/cmar.s476150 article EN cc-by-nc Cancer Management and Research 2024-08-01

Zinc oxide (ZnO) and tin (SnO 2 ) are widely used in gas sensors photocatalysis owing to their wide bandgaps, high electron mobilities, thermal stabilities. Herein, a hollow structure of SnO is synthesized without template by varying the precursor concentration synthesis time, its growth mechanism studied. In addition, core‐shell fabricated with ZnO, which heterostructure formed between two metal oxides, compensate for inferior properties .

10.1002/pssa.201900996 article EN physica status solidi (a) 2020-03-07

In this study, we fabricated Hf-doped indium zinc oxide thin-film transistors (HIZO TFTs) using a solution process. Channel layers of the TFTs were optimized by varying molar ratio Hf in channel layers. The electrical properties devices compared to gallium (GIZO). HIZO showed 0.12 V threshold voltage, 0.45 V/decade subthreshold swing and 1.24 × 106 on-off current ratio, which excellent that GIZO. particular, when positive gate bias stress 10 was applied for 10³ s, TFT exhibited lower voltage...

10.1166/jnn.2020.18761 article EN Journal of Nanoscience and Nanotechnology 2020-06-30

During the past decade, we already experienced wide spreading of mobile devices such as a phone. In first stage, most phone has its own and fixed embedded applications, users could not executed additional applications. To execute virtual machines are introduced in phones. However, due to restrictions device commercial reasons, includes single application execution platform. Therefore, only can run applications which implemented same ensure reusability reduce development costs designed L4...

10.1109/niss.2009.198 article EN International Conference on New Trends in Information and Service Science 2009-06-01

The integrity of nuclear piping systems must be maintained during operation. In order to maintain the integrity, reliable assessment procedures including fracture mechanics analysis, etc, are required. Up now, has been performed using conventional deterministic approaches even though there many uncertainties hinder a rational evaluation. this respect, probabilistic approach is considered as an appropriate method for system objectives paper develop program reliability index and simulation...

10.1115/pvp2005-71284 article EN 2005-01-01

점다당질증은 점다당질(glycosaminoglycan) 분해에 필요한 라이소솜 효소의 부족에 의해 야기되는 대사성 유전질환이 다.Heparan sulfate, dermatan chondroitin sulfate 등의 불완전 분해산물들이 세포의 라이소솜에 축적되어 호흡기, 신경계를 비롯한 여러

10.4097/kjae.2003.45.5.672 article EN Korean Journal of Anesthesiology 2003-01-01

In this study, using AlN materials produced by two different sintering techniques, grinding experiments were performed under various conditions, including table speeds and cut depths. order to measure the force, a tool dynamometer was used. Surface roughness measurements digital microscope also The forces higher at speed depth. experimental results show that characteristics of workpieces are similar.

10.14775/ksmpe.2014.13.2.094 article EN Journal of the Korean Society of Manufacturing Process Engineers 2014-04-30
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