A5013246742- Remote-Sensing Image Classification
- Dark Matter and Cosmic Phenomena
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Advanced Image Fusion Techniques
- Advanced SAR Imaging Techniques
- Image and Signal Denoising Methods
- Digital Filter Design and Implementation
- Cosmology and Gravitation Theories
- Video Surveillance and Tracking Methods
- Solar and Space Plasma Dynamics
- Face recognition and analysis
- Remote Sensing and Land Use
- Radar Systems and Signal Processing
- Advanced Adaptive Filtering Techniques
- Medical Image Segmentation Techniques
- Image Retrieval and Classification Techniques
- Biometric Identification and Security
- Advanced Image Processing Techniques
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Analog and Mixed-Signal Circuit Design
- Face and Expression Recognition
- Infrared Target Detection Methodologies
- Atomic and Subatomic Physics Research
- Blind Source Separation Techniques
University of Patras
2016-2025
AUG Signals (Canada)
1992-2002
University of Toronto
1991-1992
Hypothetical low-mass particles, such as axions, provide a compelling explanation for the dark matter in universe. Such particles are expected to emerge abundantly from hot interior of stars. To test this prediction, CERN Axion Solar Telescope (CAST) uses 9 T refurbished Large Hadron Collider magnet directed towards Sun. In strong magnetic field, solar axions can be converted X-ray photons which recorded by detectors. 2013–2015 run, thanks low-background detectors and new telescope,...
A new experiment is described to detect a permanent electric dipole moment of the proton with sensitivity $10^{-29}e\cdot$cm by using polarized "magic" momentum $0.7$~GeV/c protons in an all-electric storage ring. Systematic errors relevant are discussed and techniques address them presented. The measurement sensitive physics beyond Standard Model at scale 3000~TeV.
The CAST-CAPP axion haloscope, operating at CERN inside the CAST dipole magnet, has searched for axions in 19.74 $\mu$eV to 22.47 mass range. detection concept follows Sikivie haloscope principle, where Dark Matter convert into photons within a resonator immersed magnetic field. is an array of four individual rectangular cavities inserted strong phase-matched maximize sensitivity. Here we report on data acquired 4124 h from 2019 2021. Each cavity equipped with fast frequency tuning mechanism...
Accurate and robust information on land cover changes in urban coastal areas is essential for effective management, ecosystem monitoring, planning. This paper details the methodology results of a pixel-level classification change detection analysis, leveraging 1945 Royal Air Force (RAF) aerial imagery 2011 Very High-Resolution (VHR) multispectral WorldView-2 satellite from broader area Patras, Greece. Our attention mainly focused coastline city Patras to northeast direction two major rivers,...
Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well those reached directly at high energy colliders. Discrimination between different models, however, requires complementary searches in atomic-molecular-and-optical, nuclear and particle physics. In this report, we discuss current status prospects near future a compelling suite such experiments, along with developments needed encompassing theoretical framework.
A new method of optimized efficiency for the retrospective reconstruction tomograms is presented. The has been developed use with isocentric fluoroscopic units and capable performing digital tomosynthesis anatomical planes user selected orientation distance from isocenter. Optimization achieved by segmenting process into discrete transformations that are specific to groups pixels, rather than pixel operations. These involve a number projections acquired image matrices as well parallel...
In this work we present a search for (solar) chameleons with the CERN Axion Solar Telescope (CAST). This novel experimental technique, in field of dark energy research, exploits both chameleon coupling to matter (βm) and photons (βγ) via Primakoff effect. By reducing X-ray detection threshold used axions from 1 keV 400 eV CAST became sensitive converted solar spectrum which peaks around 600 eV. Even though have not observed any excess above background, can provide 95% C.L. limit strength...
In the ever-evolving landscape of tomographic imaging algorithms, this literature review explores a diverse array themes shaping field’s progress. It encompasses foundational principles, special innovative approaches, implementation and applications tomography in medicine, natural sciences, remote sensing, seismology. This choice is to show off diversity simultaneously new trends recent years. Accordingly, evaluation backprojection methods for breast reconstruction highlighted. After that,...
Fusion of hyperspectral data is proposed by means partitioning the bands into subgroups, prior to principal components transformation (PCT). The first component each subgroup employed for image visualization. approach general, with number in being application dependent. Nevertheless, paper focuses on partitions three subgroups suitable RGB representation. One them employs matched-filtering based spectral characteristics various materials and very promising classification purposes....
We discuss the physics case for and concept of a medium-scale axion helioscope with sensitivities in axion-photon coupling few times better than CERN Axion Solar Telescope (CAST). Search an axion-like particle these couplings is motivated by several persistent astrophysical anomalies. present early conceptual design, existing infrastructure, projected sensitivity timeline such (Troitsk Experiment, TASTE) to be constructed Institute Nuclear Research, Troitsk, Russia. The proposed instrument...
Hypothetical axions provide a compelling explanation for dark matter and could be emitted from the hot solar interior. The CERN Axion Solar Telescope has been searching via their back conversion to x-ray photons in 9-T 10-m long magnet directed toward Sun. We report on an extended run with International Observatory pathfinder detector, doubling previous exposure time. detector was operated xenon-based gas mixture part of new run, providing technical insights future configurations. No counts...
A pixel‐level fusion technique for RGB representation of multispectral images is proposed. The results in highly correlated components, a fact which occurs natural colour and strictly related to the perception attributes human eye. Accordingly, specific properties covariance matrix final image are demanded. Mutual information employed as an objective criterion quality refinement. method provides dimensionality reduction, while resulting perceptually high quality. Comparisons with existing...
Axions should be produced copiously in stars such as the Sun. The first part of this paper reviews capabilities and performance axion helioscopes. mechanism they rely on is described experimental results for interaction solar axions axion-like particles with matter are given. second actually observationally driven. New obtained Monte Carlo simulation reconstruct observations, previously dismissed, supporting an axion(-like) involvement ma≈1–2×10−2 eV c−2. To further quantify suggested...
Drunk person identification is carried out using thermal infrared images. Two different approaches are proposed for distinguishing a drunk by means of radiometric values on its face. The features used in the first approach simply pixel specific points face person. It proved that cluster moves feature space as consumes alcohol. Fisher linear discriminant dimensionality reduction. found to be very low dimensionality. majority clusters towards same direction and can easily separated into...
Decision fusion plays a crucial role in achieving cohesive and unified outcome by merging diverse perspectives. Within the realm of remote sensing classification, these methodologies become indispensable when synthesizing data from multiple sensors to arrive at conclusive decisions. In our study, we leverage fully Polarimetric Synthetic Aperture Radar (PolSAR) thermal infrared establish distinct decisions for each pixel pertaining its land cover classification. To enhance classification...
A constant false alarm rate (CFAR) detection method which is based on a combination of median and morphological filters (MEMO) proposed. The MEMO algorithm has robust performance with small CFAR loss, very good behavior at clutter edges high in the case closely spaced narrowband signals (targets). proposed favourably compared cell averaging (CA) ordered statistics (OS) detectors. Monte Carlo employed to analyze MEMO-CFAR detector.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...
In this paper a high-resolution (MR) image is reconstructed from sequence of subpixel shifted, aliased low-resolution (LR) frames by means novel nonuniform interpolation super-resolution (SR) method. A gradient-based algorithm estimates the horizontal and vertical shifts for each frame. Then, uniformly spaced sampling points UK are produced Kriging interpolation. Wiener filtering employed to deal with restoration problem. The novelty proposed approach SR reconstruction lies in employment...
Abstract Temperature distribution on the eyes of drunk persons is studied by means thermal infrared images. The sclera and iris are same temperature for sober person, while intoxicated increases. Consequently, only images from necessary intoxication screening. Forty‐one participants drank in a controlled alcohol consumption procedure. Their breath concentration was above threshold 0.2 mg/L exhaled air, which corresponds to about 0.5 mg per cubic centimeter blood. Histogram modification...