A5100699164- Digital Media Forensic Detection
- Synthesis and properties of polymers
- Advanced Steganography and Watermarking Techniques
- Advanced Sensor and Energy Harvesting Materials
- Semantic Web and Ontologies
- Advanced ceramic materials synthesis
- Adversarial Robustness in Machine Learning
- Generative Adversarial Networks and Image Synthesis
- Service-Oriented Architecture and Web Services
- Advanced Image Processing Techniques
- Advanced Neural Network Applications
- Epigenetics and DNA Methylation
- Silicone and Siloxane Chemistry
- Computer Graphics and Visualization Techniques
- Biometric Identification and Security
- Visual Attention and Saliency Detection
- Education, Safety, and Science Studies
- Pluripotent Stem Cells Research
- Nuclear materials and radiation effects
- Forensic Fingerprint Detection Methods
- Advanced Database Systems and Queries
- Glass properties and applications
- Handwritten Text Recognition Techniques
- Photoreceptor and optogenetics research
- Dielectric materials and actuators
Korea Research Institute of Chemical Technology
2022-2024
Korea Advanced Institute of Science and Technology
2012-2023
Korea Electronics Technology Institute
2023
Samsung (South Korea)
2019-2022
Gwangju Institute of Science and Technology
2021
GS Caltex (South Korea)
2020
Gyeongsan Science High School
2017
Georgetown University
2009-2010
University of Illinois Urbana-Champaign
2003-2008
American Ceramic Society
2003-2008
We introduce a facile approach to fabricate metallic grid transparent conductor on flexible substrate using selective laser sintering of metal nanoparticle ink. The conductors with high transmittance (>85%) and low sheet resistance (30 Ω/sq) are readily produced glass polymer substrates at large scale without any vacuum or high-temperature environment. Being maskless direct writing method, the shape parameters can be easily changed by CAD data. resultant also showed superior stability in...
Median filtering is used as an anti-forensic technique to erase processing history of some image manipulations such JPEG, resampling, etc. Thus, various detectors have been proposed detect median filtered images. To counter these techniques, several methods devised well. However, restoring the a typical ill-posed problem, and thus it still difficult reconstruct visually close original image. Also, further hard make restored statistical characteristic raw for purpose. solve this we present...
As technological developments have enabled high-quality fingerprint scanning, sweat pores, one of the Level 3 features fingerprints, been successfully used in automatic recognition systems (AFRS). Since pore extraction process is a critical step for AFRS, high accuracy required. However, it difficult to extract correctly because shape depends on person, region, and type. To solve problem, we presented method using deep convolutional neural networks intensity refinement. The are detect pores...
With the rapid advancement in 5G and 6G communication technology, demand for fast transmission reception speed, high-capacity communication, simultaneous multiterminal access without delay has become extremely important. Here, we fabricated liquid crystal polymer (LCP) films by judiciously controlling fluorine contents degree of orientational order. LCPs with fluorinated additives have garnered significant attention due to low dielectric properties moisture uptake compared current polymeric...
A water-borne photo-sensitive poly(amic acid) salt for the micropatterned polyimide layer of a microelectronic device.
Abstract Elastomers show improved properties when reinforced with nanoclay at low filler loadings, but dispersion of the clay is difficult in non‐polar polymers, such as ethylene propylene diene monomer (EPDM). In this work several compatibilization approaches were studied, including addition EPDM modified maleic anhydride (EPDM‐ g ‐MA) and use organoclay anhydride‐grafted liquid vinyl polybutadiene (LVPB‐ ‐MA). The LVPB‐ ‐MA‐modified increased degree measured by X‐ray diffraction, giving...
Three-dimensional (3-D) printing has become a key technology, changing industry paradigms in many sectors, including automobiles, aerospace, medical applications, content production, and service areas. However, 3-D introduces copyright infringement issues for digital objects because the object data can be directly printed distributed both online physically. New distribution scenarios not previously considered also pose new security problems. This paper reviews intellectual property...
Low-dielectric polymer materials are becoming essential for 5 G mobile communication to achieve mass transport information without signal loss. Herein, we present an aliphatic–aromatic copolyimide using Priamine 1075 (aliphatic) and m-tolidine (aromatic) as diamines. The branched bulky aliphatic units enlarge the free volume, effectively reducing dipole moment density, while aromatic diamine was introduced prevent chain relaxation under operating conditions. We observed that there is optimal...
In this paper, we propose a composite manipulation detection method based on convolutional neural networks (CNNs). To our best knowledge, is the first work applying deep learning for forgery detection. The proposed technique defines three types of attacks that occurred frequently during image forging and detects when they are concurrently applied to images. do this, learn statistical change due through CNN architecture classify manipulated image. effective since it learns integrated extracts...
A novel kind of pore self‐forming macro‐/mesoporous gehlenite (2CaO·Al 2 O 3 ·SiO ) ceramic (abbreviated C AS) having a highest porosity 80% corresponding to volume expansion 134% during sintering has been developed. The ability, microstructure, mechanical, and thermal physical properties the porous are related temperature. shows very good ability over wide range temperature from 900° 1450°C. No vesicant is required no hydrothermal treatment needed, as generally case for other kinds ceramics...
Double compression (DC) involves compressing a video twice with the codec. DC usually occurs when compressed is manipulated, because most videos are saved in format after manipulating. Given this principle, if we can detect traces videos, determine whether has been manipulated. Prior works have proposed methods for detecting of H.264 videos; however, they limitations that only limited dataset and set parameters. To overcome these limitations, propose two-stream neural network incorporates...
Bone abnormalities, one of the primary manifestations Menkes disease (MD), include a weakened bone matrix and low mineral density. However, molecular cellular mechanisms underlying these defects are poorly understood.We present in vitro modeling for impaired osteogenesis MD using human induced pluripotent stem cells (iPSCs) with mutated ATP7A gene. MD-iPSC lines were generated from two patients harboring different mutations.The MD-iPSCs showed remarkable retardation CD105 expression...
Three‐phase (triplex) ceramic composites with improved thermal stabilities resulting from minimized grain growth due to extended separations are introduced. Al 2 O 3 , yttrium aluminum garnet (YAG, Y 5 12 ), and ZrO were chemically compatible make a stable triplex composite. Another composite could be made chemical compatibility among NiAl 4 mol% yttria‐tetragonal zirconia polycrystals (3Y‐TZP). The of 33 vol% –33 YAG–33 3Y‐TZP, 50 –25 3Y‐TZP fabricated using either sintering or hot pressing...
Content-aware image resizing is the process of adjusting size an while preserving its important content. Image used to overcome diversity in resolutions between modules, such as display devices and applications, can thus be deliberately exploited distort or remove original content; therefore, detecting tampering has become topic forensics. This paper proposes a deep neural network architecture capture subtle local artifacts caused by seam-based resizing. Unlike past approaches that only...
This paper presents a domain-based transfer learning method for deep learning-based object detection models where the enables real-time computation in resource-constrained edge devices. Object is an essential task intelligent platforms (e.g., drones, robots, and autonomous vehicles). However, devices could not afford to run huge due insufficient resources. Although compressed model increases inference speed, accuracy of be significantly deteriorate. In this paper, we propose accurate while...
Mullite–aluminum phosphate (3Al 2 O 3 ·2SiO /AlPO 4 ) laminated composites were fabricated by tape casting. AlPO had a density of 1.56 g/cm , which corresponds to 61% theoretical density, and bending strength 1.5 MPa after sintering at 1600°C for 10 h. The aluminum functioned as porous, weak, chemically stable interphase was able deflect cracks in composite. To increase the weak material, 30 vol% mullite added.