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arXiv 2020年

作者： Burda, Zdzislaw AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland

We discuss the concept of width-to-spacing ratio which plays the central role in the description of local spectral statistics of evolution operators in multiplicative and additive stochastic processes for random matrices. We show that the local spectral properties are highly universal and depend on a single parameter being the width-to-spacing ratio. We discuss duality between the kernel for Dysonian Brownian motion and the kernel for the Lyapunov matrix for the product of Ginibre matrices. Copyright © 2020, The Authors. All rights reserved.

关键词： Stochastic systems

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Experimental higher-order interference in a nonlinear triple slit

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Physical Review A 2023年第3期107卷 032211-032211页

作者： Peter Namdar Philipp K. Jenke Irati Alonso Calafell Alessandro Trenti Milan Radonjić Borivoje Dakić Philip Walther Lee A. Rozema Faculty of Physics University of Vienna Vienna Center for Quantum Science and Technology (VCQ) and Research Platform for Testing the Quantum and Gravity Interface (TURIS) Boltzmanngasse 5 Vienna A-1090 Austria Security and Communication Technologies Center for Digital Safety and Security AIT Austrian Institute of Technology GmbH Giefinggasse 4 1210 Vienna Austria Institute of Theoretical Physics University of Hamburg Notkestrasse 9-11 22607 Hamburg Germany Department of Physics and Research Center OPTIMAS Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau Erwin-Schroedinger-Strasse 46 67663 Kaiserslautern Germany Institute of Physics Belgrade University of Belgrade Pregrevica 118 11080 Belgrade Serbia Institute for Quantum Optics and Quantum Information (IQOQI) Austrian Academy of Sciences Boltzmanngasse 3 A-1090 Vienna Austria Christian Doppler Laboratory for Photonic Quantum Computer Faculty of Physics University of Vienna Boltzmanngasse 5 Vienna A-1090 Austria

Interference between two waves is a well-known concept in physics, and its generalization to more than two waves is straightforward. The order of interference is defined as the number of paths that interfere in a manner that cannot be reduced to patterns of a lower order. In practice, second-order interference means that in, say, a triple-slit experiment, the interference pattern when all three slits are open can be predicted from the interference patterns between all possible pairs of slits. Quantum mechanics is often said to only exhibit second-order interference. However, this is only true under specific assumptions, typically single particles undergoing linear evolution. Here we experimentally show that nonlinear evolution can in fact lead to higher-order interference. The higher-order interference in our experiment can be understood using a simple classical or quantum description, namely optical coherent states interacting in a nonlinear medium. Our work shows that nonlinear evolution could open a loophole for experiments attempting to verify Born's rule by ruling out higher-order interference.

关键词： Nonlinear optics Optical tests of quantum theory Quantum foundations Quantum information processing Quantum states of light Optical interferometry

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The Research on Co Oxidation Over Ce-Mn Oxides: The Preparation Method Effects and Oxidation Mechanism

SSRN

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SSRN 2023年

作者： Ye, Zhiping Liu, Yang Nikiforov, Anton Ji, Jiayu Zhao, Bo Wang, Jiade College of Environment Zhejiang University of Technology 18 Chaowang RD Hangzhou310014 China Ghent University Faculty of Engineering Department of Applied Physics Research Unit Plasma Technology Sint-Pietersnieuwstraat 41 Ghent9000 Belgium Zhejiang Tuna Environmental Science & Technology Co. Ltd Shaoxing312071 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China

A series of CeO2-MnOx for highly efficient catalytical oxidation of carbon monoxide were prepared by citrate sol-gel (C), hydrothermal (H) and hydrothermal-citrate complexation (CH) methods. The outcome indicates that the catalyst generated using the CH technique (CH-1:8) demonstrated the greatest catalytic performance for CO oxidation with a T50 of 98°C, and also good stability in 1400 min. Compared to the catalysts prepared by C and H method, CH-1:8 has the highest specific surface of 156.1 m2/g, and the better reducibility of CH-1:8 was also observed in CO-TPR. It is also observed the high ratio of adsorbed oxygen/lattice oxygen (1.5) in the XPS result. Moreover, characterizations by the TOF-SIMS method indicated that obtained catalyst CH-Ce/Mn=1:8 had stronger interactions between Ce and Mn oxides, and the redox cycle of Mn3++Ce4+→ Mn4++Ce3+ was a key process for CO adsorption and oxidation process. According to in-situ FTIR, the possible reaction pathway for CO was deduced in three ways. CO directly oxidize with O2 to CO2, CO adsorbed on Mn4+ and Ce3+ reacts with O to form intermediates (COO-)(T>50°C) and carbonates (T>90°C), which are further oxidized into CO2. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

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Comment on 'Phase transition in a network model of social balance with Glauber dynamics'

arXiv

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arXiv 2020年

作者： Malarz, Krzysztof Kulakowski, Krzysztof AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland

In a recent work [R. Shojaei et al, Physical Review E 100, 022303 (2019)] the Authors calculate numerically the critical temperature Tcof the balanced-imbalanced phase transition in a fully connected graph. According to their findings, Tcdecreases with the number of nodes N. Here we calculate the same critical temperature using the heat-bath algorithm. We show that Tcincreases with N as N γ, with γclose to 0.5 or 1.0. This value depends on the initial fraction of positive bonds. Copyright © 2020, The Authors. All rights reserved.

关键词： Temperature

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Observation of Plasmoelectric Effect in Plasmonic Zirconium Nitride

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Advanced Materials Interfaces 2023年第1期10卷

作者： Ishii, Satoshi Yu, Min-Wen Chen, Kuo-Ping Nagao, Tadaaki 1-1 Namiki Ibaraki Tsukuba305–0044 Japan Faculty of Pure and Applied Physics University of Tsukuba Ibaraki Tsukuba305–8577 Japan PRESTO Japan Science and Technology Agency Saitama Kawaguchi332–0012 Japan College of Photonics National Yang Ming Chiao Tung University Tainan71150 Taiwan Institute of Imaging and Biomedical Photonic College of Photonics National Yang Ming Chiao Tung University 301 Gaofa 3rd Road Tainan71150 Taiwan Department of Condensed Matter Physics Graduate School of Science Hokkaido University Hokkaido Sapporo060–0810 Japan

A plasmonic nanostructure forming a metal-semiconductor interface generates electric potential by optical illumination. Grounded plasmonic nanostructures can also generate electric potentials based on the recently demonstrated plasmoelectric effect that allows all metallic photoelectric devices to be fabricated and is capable of generating negative and positive potentials at off-resonance by merely tuning the illumination wavelength. However, to date, the plasmoelectric effect has been observed only with gold and silver. In this study, the generation of plasmoelectric effect by zirconium nitride (ZrN) is experimentally demonstrated, which is a nonmetallic plasmonic material. The Kelvin probe force microscope measurements demonstrate that ZrN nanodisk arrays fabricated through e-beam lithography and dry etching exhibit characteristic potential sign changes of the plasmoelectric potential. The features of the wavelength-dependent potential shifts in the experiments agree with the numerical calculations. It is anticipated that the plasmoelectric effect can be observed in other non-metallic plasmonic materials and these studies may lead to robust photoelectric devices working at off-resonances. © 2022 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH.

关键词： Transition metals

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Persistent currents in topological and trivial confinement defined in silicene

arXiv

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arXiv 2020年

作者： Jurkowski, Piotr Szafran, Bartlomiej AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland

We consider states bound at the flip of the electric field in buckled silicene. Along the electric flip lines a topological confinement is formed with the orientation of the charge current and the resulting magnetic dipole moment determined by the valley index. We compare the topological confinement to the trivial one that is due to a local reduction of the vertical electric field but without energy gap inversion. For the latter the valley does not protect the orientation of the magnetic dipole moment from inversion by external magnetic field. We demonstrate that the topologically confined states can couple and form extended bonding or antibonding orbitals with the energy splitting influenced by the geometry and the external magnetic field. Copyright © 2020, The Authors. All rights reserved.

关键词： Silicene

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Education Data Mining For Yemen Regions Based On Hierarchical Clustering Analysis

Education Data Mining For Yemen Regions Based On Hierarchica...

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technology, science and Administration (ICTSA), International Conference of

作者： Fahd Alqasemi Salah AL-Hagree Amal Aqlan Khaled M. A. Alalayah Zahraa Almotwakl Mohammed Hadwan University of Science and Technology Yemen IBB University Yemen King Khalid University Community College Mohayel Aseer Saudi Arabia Computer Science IBB University Yemen Computer Science Najran KSA College of Computer Qassim University Buriydah Saudi Arabia Faculty of Applied Sciences Taiz University Taiz Yemen

ISBN: (纸本)9781665428637

In recent years, Educational Data Mining (EDM) is a new field that has been employed for extracting intrinsic educational new facts. EDM has become a hot topic in the field of educational informatics. In this paper we had applied clustering analysis on Yemen regions education statistics. We had achieved a mining process using hierarchical algorithm. The clustering analysis depicts latent knowledge beneath education data, which is illustrated by a dendrogram; i.e. hierarchical diagram. By performing single-linkage method, we had categorized Yemen regions using education data analysis. This categorization is employed for generating hierarchical ranking, which draw general image of the implied knowledge of targeted domain. The results presents promising relations between Yemen regions, that would help decision makers to understand the nature of education variables, which are distributed over the country.

关键词： Deep learning Data analysis Education Clustering algorithms Tools Data mining Informatics

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Effect of Ultrasonic Process Parameter on Resistance and Plastic Deformation of the Aluminum Ribbon Bond on Molybdenum Layer

Effect of Ultrasonic Process Parameter on Resistance and Pla...

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IEEE Region 10 International Conference TENCON

作者： Sabarina Abdul Hamid Muhammad Nubli Zulkifli Azman Jalar Maria Abu Bakar Wan Nursheila Wan Jusoh Hassan Basher Michael Daenen Renewable Energy Research Laboratory (RENERAL) Electrical Engineering Section Universiti Kuala Lumpur British Malaysian Institute Gombak Malaysia Department of Applied Physics Faculty of Science and Technology Institute of Microengineering and Nanoelectronics Universiti Kebangsaan Malaysia Bangi Selangor Malaysia Institute of Microengineering and Nanoelectronics Universiti Kebangsaan Malaysia Bangi Selangor Malaysia Fire Safety Research Cluster Aerospace Section Universiti Kuala Lumpur Malaysian Institute of Aviation Technology Malaysia Faculty of Engineering Technology Hasselt University Diepenbeek Belgium

The aim of this study is to evaluate the effect of process parameters on resistance and plastic deformation of ultrasonic aluminum ribbon bond on the molybdenum back contact layer of copper indium gallium selenide (CIGS) thin film photovoltaic (TFPV) solar panel. The aluminium ribbon was ultrasonically bonded on molybdenum with two process parameter settings with constant pressure and energy while varying the amplitude. The resistance measurement of the samples was conducted with two techniques which are the transmission line method (TLM) and micro-ohmmeter to evaluate the conductivity of the interconnection. Moreover, the plastic deformation of the aluminium bond from longitudinal and transverse cross-sections was examined by measuring the thickness of the aluminum bond. The resistance of the samples is directly proportional to the amplitude applied while the thickness of the aluminum for both longitudinal and transverse cross-sections is inversely proportional to the amplitude employed. By applying adequate pressure (3.5 bar) and energy (20 J), with the lower amplitude applied which is 7.7 µm, less plastic deformation occurs to the aluminum bond with lower resistance measured.

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A fuzzy assessment model for freestyle swimmers - a comparative analysis of the MCDA methods

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Procedia computer science 2021年 192卷 4148-4157页

作者： Jakub Więckowski Larisa Dobryakova Research Team on Intelligent Decision Support Systems Department of Artificial Intelligence and Applied Mathematics Faculty of Computer Science and Information Technology West Pomeranian University of Technology in Szczecin ul.Żołnierska 49 71-210 Szczecin Poland

Multi-Criteria Decision Analysis methods are readily used in decision support models. However, many methods in this group of methods cause a problem with choosing an appropriate method for a given problem. One of such methods is COMET (Characteristic Objects Method), which compares pairs of Characteristic Objects (COs) when calculating preference values of alternatives. In this paper, the COMET method was used to create a model that evaluates swimming athletes regarding their predisposition to compete in freestyle sprint events. Besides, to reduce the complexity of the problem, a division of the initial structure was applied, which made it possible to reduce the number of comparisons to 0.7e -8 % of their initial number. To verify the obtained results, it was decided to use selected MCDA methods to solve the same problem. The correlation between the rankings was examined using the Pearson correlation coefficient and the WS similarity coefficient. Based on the results obtained, it can be concluded that the proposed model gives results that guarantee a high correlation with the results from the other methods. Moreover, it can be useful in evaluating and selecting swimming athletes for participation in given events.

关键词： Sport management COMET MCDA Swimming

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Comparative studies of the sensitivities of sparse and full geometries of Total-Body PET scanners built from crystals and plastic scintillators

arXiv

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arXiv 2023年

作者： Dadgar, Meysam Parzych, Szymon Baran, Jakub Chug, Neha Curceanu, Catalina Czerwiński, Eryk Dulski, Kamil Elyan, Kavya Gajos, Aleksander Hiesmayr, Beatrix C. Kaplon, Lukasz Klimaszewski, Konrad Konieczka, Pawel Korcyl, Grzegorz Kozik, Tomasz Krzemień, Wojciech Kumar, Deepak Niedźwiecki, Szymon Panek, Domonik del Rio, Eleną Perez Raczyński, Lech Sharma, Sushil Shivani Shopa, Roman Y. Skurzok, Magdalena Stępień, Ewa L. Ardebili, Faranak Tayefi Ardebili, Keyvan Tayefi Vandenberghe, Stefaan Wiślicki, Wojciech Moskal, Pawel Faculty of Physics Astronomy and Applied Computer Science Poland Department of Experimental Particle Physics and Applications Jagiellonian University Krakow Poland Total-Body Jagiellonian-PET Laboratory Jagiellonian University Krakow Poland Theranostics Center Jagiellonian University Krakow Poland INFN Laboratori Nazionali di Frascati Frascati Italy Faculty of Physics University of Vienna Vienna Austria Department of Complex Systems National Centre for Nuclear Research Otwock-Swierk Poland High Energy Physics Division National Centre for Nuclear Research Otwock-Swierk Poland Department of Electronics and Information Systems MEDISIP Ghent University-IBiTech Gent Belgium

Background: Alongside the benefits of Total-Body imaging modalities, such as higher sensitivity, single-bed position, low dose imaging, etc., their final construction cost prevents worldwide utilization. The main aim of this study is to present a simulation-based comparison of the sensitivities of existing and currently developed tomographs to introduce a cost-efficient solution for constructing a Total-Body PET scanner based on plastic scintillators. Methods: For the case of this study, eight tomographs based on the uEXPLORER configuration with different scintillator materials (BGO, LYSO), axial field-of-view (97.4 cm and 194.8 cm), and detector configuration (full and sparse) were simulated. In addition, 8 J-PET scanners with different configurations, such as various axial field-of-view (200 cm and 250 cm), the different cross-sections of plastic scintillator, and the multiple numbers of the plastic scintillator layers (2, 3, and 4), based on J-PET technology have been simulated by GATE software. Furthermore, Biograph Vision has been simulated to compare the results with standard PET scans. Two types of simulations have been performed. The first one with a centrally located source with a diameter of 1mm and a length of 250 cm, and the second one with the same source inside a water-filled cylindrical phantom with a diameter of 20 cm and a length of 183 cm. Results: With regards to sensitivity, among all the proposed scanners, the ones constructed with BGO crystals give the best performance (∼ 350 cps/kBq at the center). The utilization of sparse geometry or LYSO crystals significantly lowers the achievable sensitivity of such systems. The J-PET design gives a similar sensitivity to the sparse LYSO crystal-based detectors while having full detector coverage over the body. Moreover, it provides uniform sensitivity over the body with additional gain on its sides and provides the possibility for high-quality brain imaging. Conclusion: Taking into account not only the s

关键词： Ionization

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