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SSRN 2024年

作者： Helmi, Ahmed M. Al-Qaness, Mohammed A.A. Dahou, Abdelghani Trouba, Nafissa Toureche Elaziz, Mohamed Abd College of Physics and Electronic Information Engineering Zhejiang Normal University Jinhua321004 China School of Computer Science and Technology Zhejiang Normal University Jinhua321004 China Mathematics and Computer Science department University of Ahmed DRAIA Adrar01000 Algeria Department of Mathematics Faculty of Science Zagazig University Zagazig44519 Egypt Computer Engineering Dept. Engineering and Information Technology College Buraydah Private Colleges Buraydah51418 Saudi Arabia Computer and Systems Engineering Dept. Faculty of Engineering Zagazig University Zagazig44519 Egypt

HighlightsTCN-InceptionTemporal Convolutional Network and Inception modules for Sensor-based Human Activity RecognitionMohammed A. A. Al-qaness,Abdelghani Dahou,Nafissa Toureche Trouba,Mohamed Abd Elaziz,Ahmed M. Helmi• Employing the Inception modules with Temporal Convolutional Network and using residual connections for capturing complex temporal patterns in HAR signals.• Extraction of multi-scale features and capturing of extended temporal dependencies using the novel model• Consideration of training efficiency and model depth through the strategic use of residual connections and batch normalization.• Studying four different complex datasets, with variant set of activities, and carrying out an ablation study for more detailed analysis of the model. © 2024, The Authors. All rights reserved.

关键词： Internet of things

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BI-LIPSCHITZ ANSATZ FOR ANTI-SYMMETRIC FUNCTIONS

arXiv

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arXiv 2025年

作者： Dym, Nadav Lu, Jianfeng Mizrachi, Matan Faculy of Mathematics Faculty of Computer Science Technion- Israel Institute of TEchnology Haifa Israel Department of Mathematics Department of Physics Department of Chemistry Duke University DurhamNC27708 United States Faculty of Mathematics Technion- Israel Institute of Technology Haifa Israel

Motivated by applications for simulating quantum many body functions, we propose a new universal ansatz for approximating anti-symmetric functions. The main advantage of this ansatz over previous alternatives is that it is bi-Lipschitz with respect to a naturally defined metric. As a result, we are able to obtain quantitative approximation results for approximation of Lipschitz continuous antisymmetric functions. Moreover, we provide preliminary experimental evidence to the improved performance of this ansatz for learning antisymmetric *** Codes 41A63, 41A29, 68T07, 81Q05 © 2025, CC BY.

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A novel watermark method for image protection based on periodic haar piecewise-linear transform 1

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10th International Conference on Multimedia Communications, Services and Security, MCSS 2020

作者： Dziech, Andrzej Bogacki, Piotr Derkacz, Jan The Faculty of Computer Science Electronics and Telecommunications The Department of Telecommunications AGH University of Science and Technology Krakow Poland

ISBN: (数字)9783030590000

ISBN: (纸本)9783030589998

In this paper, a novel watermark method based on Periodic Haar Piecewise-Linear (PHL) transform is proposed. This solution provides high embedding capacity with negligible degradation of image quality. The PHL transform is based on integration and differentiation of periodic Haar functions. Its major advantage is the fact that it is notably fast and easy to implement and beyond that it provides good reconstruction quality. The procedure for constructing two-dimensional PHL functions and transform is introduced. Furthermore, the analysis of embedding capacity and imperceptibility of the proposed algorithm is performed. PSNR (Peak Signal to Noise Ratio) is taken as a measure of perceptual quality. The method is compared with DCT approach in certain aspects of watermarking algorithms. © Springer Nature Switzerland AG 2020.

关键词： Signal to noise ratio

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Is a Bcc Matrix Better than Fcc? Kinetics and Mechanisms of High-Temperature Oxidation of High-Carbon Fe-Based Complex Concentrated Alloys

SSRN

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SSRN 2023年

作者： Wieczerzak, Krzysztof Stygar, Miroslaw Brylewski, Tomasz Chulist, Robert Bala, Piotr Michler, Johann Empa Swiss Federal Laboratories for Materials Science and Technology Laboratory of Mechanics of Materials and Nanostructures Feuerwerkerstrasse 39 ThunCH-3602 Switzerland AGH University of Science and Technology Faculty of Materials Science and Ceramics Al. A. Mickiewicza 30 Krakow30-059 Poland Institute of Metallurgy and Materials Science Polish Academy of Sciences Ul. Reymonta 25 Kraków30-059 Poland AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science Al. A. Mickiewicza 30 Krakow30-059 Poland

This study analyzes high-temperature oxidation and microstructural evolution in two high-carbon Fe-based complex concentrated alloys with different matrices – body-centered cubic (BCC) and face-centered cubic (FCC). The results demonstrate that the BCC matrix alloy exhibits slower oxidation kinetics than the FCC counterpart, suggesting superior suitability for high-temperature applications. Both alloys developed adhesive oxide scales, primarily composed of Cr2O3, with the FCC alloy displaying greater scale spallation and cracking. Decarburization was observed in both alloys, progressing faster in the BCC matrix. This research emphasizes the importance of understanding these processes for the design of high-performance alloys for extreme conditions. © 2023, The Authors. All rights reserved.

关键词： Thermooxidation

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Protein Orientation and Polymer Phase Separation Induced by Poly(Methyl Methacrylate) Tacticity

SSRN

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SSRN 2024年

作者： Janiszewska, Natalia Raczkowska, Joanna Gajos, Katarzyna Awsiuk, Kamil Jagiellonian University Faculty of Physics Astronomy and Applied Computer Science Smoluchowski Institute of Physics Lojasiewicza 11 Kraków30-348 Poland Jagiellonian University Doctoral School of Exact and Natural Sciences Lojasiewicza 11 Kraków30-348 Poland

Stereochemistry may affect physicochemical and biological properties of polymers films that are important for their applications, including substrates for the fabrication of protein microarrays. In this study, we investigated the effect of poly(methyl methacrylate) (PMMA) tacticity on the interaction of polymer thin films with proteins and on the phase separation process in blends with poly(tert-butyl methacrylate) (PtBMA). Thin films of isotactic, atactic and syndiotactic PMMA were studied for topography, surface chemistry and protein adsorption. Secondary ion mass spectrometry and contact angle measurements revealed a lower surface exposure of polar ester functional groups for iso-PMMA, resulting in reduced adsorption of albumin and fibrinogen proteins. We also showed that changes in surface chemistry alter the orientation of proteins adsorbed on iso-PMMA through hydrophobic and electrostatic interactions. In addition, blends composed of PMMA and PtBMA, both of different tacticities, were investigated in terms of the protein microarray fabrication. The 2-dimensional domain structure was obtained by a phase separation process for at-PtBMA blends prepared on silicon substrates modified with amino-silane. Finally, for an isotropic and regular polymer pattern of iso-PMMA/at-PtBMA, the possibility of protein microarrays formation on this blend was demonstrated, showing selective adsorption to PtBMA domains and perfect mirroring of the polymer patterns. © 2024, The Authors. All rights reserved.

关键词： Polymer films

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Maximal Quantum Interaction between Free Electrons and Photons

引用

Physical Review Letters 2025年第4期134卷 043803-043803页

作者： Zetao Xie Zeling Chen Hao Li Qinghui Yan Hongsheng Chen Xiao Lin Ido Kaminer Owen D. Miller Yi Yang Department of Physics and HK Institute of Quantum Science and Technology The University of Hong Kong Pokfulam Hong Kong China Z. X. and Z. C. contributed equally to this Letter. Department of Applied Physics and Energy Sciences Institute Yale University New Haven Connecticut 06520 USA Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation College of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China Solid State Institute and Faculty of Electrical and Computer Engineering Technion—Israel Institute of Technology 32000 Haifa Israel

The emerging field of free-electron quantum optics enables electron-photon entanglement and holds the potential for generating nontrivial photon states for quantum information processing. Although recent experimental studies have entered the quantum regime, rapid theoretical developments predict that qualitatively unique phenomena only emerge beyond a certain interaction strength. It is thus pertinent to identify the maximal electron-photon interaction strength and the materials, geometries, and particle energies that enable one to approach it. We derive an upper limit to the quantum vacuum interaction strength between free electrons and single-mode photons, which illuminates the conditions for the strongest interaction. Crucially, we obtain an explicit energy selection recipe for electrons and photons to achieve maximal interaction at arbitrary separations and identify two optimal regimes favoring either fast or slow electrons over those with intermediate velocities. We validate the limit by analytical and numerical calculations on canonical geometries and provide near-optimal designs indicating the feasibility of strong quantum interactions. Our findings offer fundamental intuition for maximizing the quantum interaction between free electrons and photons and provide practical design rules for future experiments on electron-photon and electron-mediated photon-photon entanglement. They should also enable the evaluation of key metrics for applications such as the maximum power of free-electron radiation sources and the maximum acceleration gradient of dielectric laser accelerators.

关键词： Quantum optics

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Frequency dependence of nonsequential double ionization of atoms in strong laser fields

arXiv

引用

arXiv 2024年

作者： Thiede, Jan H. Prauzner-Bechcicki, Jakub S. Fachbereich Physik Philipps-Universität Marburg MarburgD-35032 Germany Jagiellonian University in Kraków Faculty of Physics Astronomy and Applied Computer Science Marian Smoluchowski Institute of Physics Lojasiewicza 11 Krakow30-348 Poland

The frequency dependence of (nonsequential) double ionization is studied in fully quantum mechanical calculations using a (1+1)-dimensional model atom. Other time-dependent effects such as the influence of the number of field cycles are also investigated. We present ionization yields and momentum distributions. The results are consistent with experimental and semi-classical data available in the literature, thus complementing them with a quantum mechanical description. © 2024, CC BY-NC-ND.

关键词： Ionization of gases

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Design of Monopole Transparent Antenna for Satellite Internet Aboard Aircraft

Design of Monopole Transparent Antenna for Satellite Interne...

引用

International Electrical Engineering Congress (iEECON)

作者： Tawan Thianthong Patchadaporn Sangpet Chatree Mahatthanajatuphat Nipont Tangthong Chawalit Rakluea Nonchanutt Chudpooti Thinnawat Jangjing Supphakon Khongchon Siam Airport Ground Services Co. Ltd. Bangkok Thailand Department of Electronics and Telecommunication Engineering Rajamangala Faculty of Engineering University of Technology Thanyaburi Thailand Department of Electrical and Computer Engineering Faculty of Engineering King Mongkut's University of Technology North Bangkok Bangkok Thailand Department of Industrial Physics and Medical Instrumentation Faculty of Applied Science King Mongkut's University of Technology North Bangkok Bangkok Thailand

ISBN: (数字)9798331543952

ISBN: (纸本)9798331543969

This research presents the design of a transparent antenna for satellite internet aboard aircraft. The presented antenna comprises a triangular arrow monopole antenna fed by a tapered microstrip transmission line. It employs a polycarbonate composite substrate with a dielectric constant (εr) of 2.8 and a thickness (h) of 1 mm. The proposed transparent antenna achieves a bandwidth in the frequency range of 10.42–22.70 GHz, with an omnidirectional radiation pattern and an average gain of 2.57 dBi, effectively covering the Ku band for satellite internet applications. The antenna design was simulated using electromagnetic wave CST simulation software, and a prototype antenna was fabricated. The designed antenna exhibits a reflection coefficient of less than -10 dB throughout the 10.7–12.7 GHz frequency range, which is the operational frequency range for satellite internet and is an acceptable value in research terms. Moreover, a conductor with a thickness of 0.035 mm sits on a composite substrate material to form the antenna structure for satellite internet aboard aircraft. We need to study and apply various techniques to further enhance the antenna's performance in future designs.

关键词： Satellite antennas Airplanes Satellites Microstrip antennas Military aircraft Internet Substrates Gain Antenna radiation patterns Transmission line antennas

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Color Reconnection Effects in J/ψ Hadroproduction

arXiv

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arXiv 2023年

作者： Kotko, Piotr Motyka, Leszek Staśto, Anna AGH University of Krakow Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland Jagiellonian University Institute of Theoretical Physics S. Lojasiewicza 11 Kraków30-348 Poland The Pennsylvania State University Physics Department 104 Davey Lab University ParkPA16802 United States

We investigate production of J/ψ mesons in hadron-hadron collisions, defined as low invariant mass cc¯ singlets produced in a mixture of perturbative and nonperturbative mechanisms provided by the PYTHIA Monte Carlo. We find that in this model the color reconnection mechanism, which breaks the factorization, is essential to reasonably describe the experimental data. Copyright © 2023, The Authors. All rights reserved.

关键词： Hadrons

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Text-Based Product Matching with Incomplete and Inconsistent Items Descriptions 21st

Text-Based Product Matching with Incomplete and Inconsisten...

引用

21st International Conference on Computational science, ICCS 2021

作者： Lukasik, Szymon Michalowski, Andrzej Kowalski, Piotr A. Gandomi, Amir H. Faculty of Physics and Applied Computer Science AGH University of Science and Technology al. Mickiewicza 30 Kraków30-059 Poland Systems Research Institute Polish Academy of Sciences ul. Newelska 6 Warsaw01-447 Poland Synerise PLC ul. Lubostroń 1 Kraków30-383 Poland Faculty of Engineering and Information Technology University of Technology Sydney UltimoNSW2007 Australia

ISBN: (纸本)9783030779634

In recent years Machine Learning and Artificial Intelligence are reshaping the landscape of e-commerce and retail. Using advanced analytics, behavioral modeling, and inference, representatives of these industries can leverage collected data and increase their market performance. To perform assortment optimization – one of the most fundamentals problems in retail – one has to identify products that are present in the competitors’ portfolios. It is not possible without effective product matching. The paper deals with finding identical products in the offer of different retailers. The task is performed using a text-mining approach, assuming that the data may contain incomplete information. Besides the description of the algorithm, the results for real-world data fetched from the offers of two consumer electronics retailers are being demonstrated. © 2021, Springer Nature Switzerland AG.

关键词： Sales

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