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SSRN 2023年

作者： Kővágó, Ákos Kovacs, Marinel Szabó, Csaba Gergely, Szilveszter Kovács, István János Eötvös Loránd University Faculty of Science Doctoral School of Earth Sciences Budapest Hungary HUN-REN Institute of Earth Physics and Space Science Sopron Hungary Eötvös Loránd University Faculty of Science Litosphere Researh Group Budapest Hungary MTA FI Lendület Pannon LitH2Oscope Research Group Sopron Hungary Technical University of Cluj Napoca North University Centre of Baia-Mare Baia Mare Romania University of Technology and Economics Department of Applied Biotechnology and Food Science Budapest Hungary

Firiza basaltic complex (FBC) is the last volcanic phase (8.1-7.0 Ma) of the Gutâi Volcanic Zone (GVZ) from the Neogene-Quaternary volcanic chain of the Eastern Carpathians (Romania). Nine small dykes of the FBC crosscut older volcanic products (11.3-9.0 Ma) and consist of clinopyroxene + olivine microporphyritic-aphanitic basalts. Overall, the volcanic rocks from GVZ, and Firiza basalts show typical arc/subduction zone-related geochemical features (calc-alkaline) in contrast with the alkali basalts from the Carpathian-Pannonian region (CPR). Based on the chemical composition (SEM-EDS and EMPA) of the studied clinopyroxenes, it is shown that the cores of the clinopyroxene phenocrysts and glomerocrysts are the most primitive (Mg#: 79-91) and alongside the Mg-rich olivine were the first crystallised phases from a basaltic melt. A deep magma source (22-30 km depth) in the lower crust near the MOHO (33-35 km depth in GVZ) is indicated by the crystallization pressure (̴ 5.5-8.5 kbar) obtained for the clinopyroxene *** studying of these clinopyroxene cores with Fourier Transform Infrared spectrometry (FTIR) new information on the ‘water’ content in the deep-seated magma chamber can be obtained. The structural hydroxyl content of the clinopyroxene cores shows relatively high values (105 ‑515 wt. ppm). From the structural hydroxyl content, the equilibrium melt ‘water’ contents were calculated, which show melt ‘water’ contents of 1.85-3.91 wt.% overlapping with the values reported from island arc basalts (IAB) and the values are higher than those from the alkali basalts from the Bakony-Balaton Highland Volcanic Field (BBHVF for short, central CPR). The source ‘water’ content for the FBC basalts calculated for the modal batch model (2300-5200 ppm) and for the modal fractional melting model (2200-4800 ppm ), respectively, are falling into the range of IABs and also higher than the values reported from the BBHVF alkali basalts. These observations can be accounted for the g

关键词： Basalt

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On the fourth-order Leray-Lions problem with indefinite weight and nonstandard growth conditions

arXiv

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arXiv 2022年

作者： Kefi, K. Irzi, N. Al-Shomrani, M.M. Repovš, Dušan D. Faculty of Computer Science and Information Technology Northern Border University Rafha Saudi Arabia Mathematics Department Faculty of Sciences University of Tunis El-Manar Tunis1060 Tunisia Department of Mathematics Faculty of Science King Abdulaziz University P.O. Box 80203 Jeddah21589 Saudi Arabia Faculty of Education Faculty of Mathematics and Physics University of Ljubljana Institute of Mathematics Physics and Mechanics Ljubljana1000 Slovenia

We prove the existence of at least three weak solutions for the fourth-order problem with indefinite weight involving the Leray-Lions operator with nonstandard growth conditions. The proof of our main result uses variational methods and the critical theorem of Bonanno and Marano (Appl. Anal. 89 (2010), 1-10).MSC Codes 35J20, 35J60, 35G30, 35J35, 46E35 Copyright © 2022, The Authors. All rights reserved.

关键词： Sobolev spaces

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Detection of biofuel adulterants using an optical fiber-based refractive index sensor

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Optik 2023年第1期291卷

作者： Prasanth, A. Harini, V.K. Manivannan, P. Velumani, M. Narasimman, S. Meher, S.R. Alex, Z.C. Department of Sensor and Biomedical Technology School of Electronics Engineering Vellore Institute of Technology Vellore India Department of Physics School of Advanced sciences Vellore Institute of Technology Vellore India Department of CSE – Cyber Security & IoT Sri Ramachandra Faculty of Engineering and Technology Sri Ramachandra Institute of Higher Education and Research Chennai600116 India Department of Electrical and Computer Engineering Missouri University of Science and Technology RollaMO65409 United States

This study presents a Lossy Mode Resonance (LMR) based on fiber optic sensor for detecting biofuel adulteration. Tin Oxide (SnO2), coated over the clad removed portion of the optical fiber using the Radio Frequency Magnetron sputtering technique, was utilized as the sensing layer. The fabricated sensor probe was analyzed with various concentrations of the analytes that include methanol in ethanol, ethanol in methanol, methanol in water, ethanol in water, water in methanol, and water in ethanol. The absorption spectra of the fabricated sensor probe revealed two LMR peaks namely, LMR1 and LMR2 that exhibited wavelength shift under varying concentration of the analytes. The maximum sensor responses for the above combinations of the analytes were 4.95%, 3.30%, 3.00%, 3.56%, 2.91% and 3.57%, respectively. The sensitivities of the sensor probe towards these analytes were 0.46 nm/vol%, 0.17 nm/vol%, 0.49 nm/vol%, 0.58 nm/vol%, 0.08 nm/vol%, and 0.4 nm/vol%, respectively. The real time sample were examined using metal oxides coated sensors. The result exhibits SnO2 coated probe is sensitive than other probes. © 2023 Elsevier GmbH

关键词： Biofuels

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Shadows and Optical Appearances of Black Holes in R2 Gravity

arXiv

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arXiv 2025年

作者： Jafarzade, Khadije Shaymatov, Sanjar Jamil, Mubasher Department of Theoretical Physics Faculty of Science University of Mazandaran P. O. Box 47416-95447 Babolsar Iran Institute of Fundamental and Applied Research National Research University TIIAME Kori Niyoziy 39 Tashkent100000 Uzbekistan Institute for Theoretical Physics and Cosmology Zhejiang University of Technology Hangzhou310023 China University of Tashkent for Applied Sciences Str. Gavhar 1 Tashkent100149 Uzbekistan Western Caspian University BakuAZ1001 Azerbaijan School of Natural Sciences National University of Sciences and Technology Islamabad44000 Pakistan

In this paper, we consider a charged AdS/dS black hole (BH) in R2 gravity and study its optical features, including the shadow’s geometrical shape and the energy emission rate. Additionally, we look for criteria to restrict the free parameters of the theory by comparing them to observational data of M87★. Then, we employ the Newman-Janis algorithm to build the rotating counterpart of the static solution in R2 gravity and calculate the energy emission rate for the rotating case as well as discuss how the rotation factor and other parameters of this theory affect the emission of particles around the BHs. In the following, we consider the obtained rotating BH as a supermassive black hole and evaluate the parameters of the model with shadow size estimates based on the observations of M87★ from EHT. Copyright © 2025, The Authors. All rights reserved.

关键词： Black holes

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3d Printed Li-Air Batteries with Electrolyte Containing Organic Solvents and Charcoal Cathode

SSRN

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SSRN 2023年

作者： Nagy, Lajos Serra, Üneri Haymana Kordován, Marcell Árpád Nagy, Tibor Kuki, Ákos Nyul, Dávid Pál, Petra Erdélyi, Zoltán Zsuga, Miklós Kéki, Sándor Department of Applied Chemistry Faculty of Science and Technology University of Debrecen Egyetem tér 1 DebrecenH-4032 Hungary Doctoral School of Chemistry University of Debrecen Egyetem te ŕ 1 DebrecenH-4032 Hungary Department of Solid State Physics Faculty of Sciences and Technology University of Debrecen P.O. Box 400 DebrecenH-4002 Hungary

In this paper, we report the construction and investigation of 3D printed Li-air batteries consisting of charcoal cathode and cotton texture soaked with different organic solvents containing lithium triflate (LiOTf) electrolyte. Charcoal was found to be appropriate cathode for Li-Air batteries, furthermore, cycling tests showed stable operation over 800 cycles in the cases of dimethyl sulfoxide (DMSO) and diethylene glycol dimethyl ether (DEGME) solvents, while for propylene carbonate (PC) low electrochemical stability was observed. Charging, discharging and long-term discharging steps were mathematically modeled. The electrochemical impedance spectroscopy (EIS) showed Gerischer impedance suggesting intensive oxygen transport at the surface of charcoal cathode. Diffusion, charge transfer and solid electrolyte interphase (SEI) processes were identified by means of distribution of relaxation time (DRT) analysis. In the polypropylene (PP) membrane soaked with LiOTf in DEGME, three different states of Li-ions were identified by 7Li-triple-quantum time proportional phase increment (TQTPPI) NMR measurements. Based on the latter results a mechanism was suggested for the Li-ion transport inside the PP membrane. The activity of charcoal cathode was confirmed by Raman and cyclic voltammetry (CV) measurements. © 2023, The Authors. All rights reserved.

关键词： Textures

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Decoherence puzzle in measurements of photons originating from electron-positron annihilation

arXiv

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arXiv 2022年

作者： Sharma, Sushil Kumar, Deepak Moskal, Pawel Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków Poland Total-Body Jagiellonian-PET Laboratory Jagiellonian University Kraków Poland Center for Theranostics Jagiellonian University Kraków Poland

Entanglement of photons originating from the electron-positron annihilation has not been proven experimentally. Though the independent experiments performed so far unanimously confirm that correlation between the linear polarizations of back-to-back photons from the electron-positron annihilation is consistent with the assumption that these photons are entangled in polarization. Yet, unexpectedly, recent experiments differ as regards the correlation of polarization direction of back-to-back photons after the decoherence induced by scattering of one of these photons on the electron in the scattering material. In one of the experiments, the correlation before and after the decoherence of the photon state is the same and in the other experiment the scattering of one photon leads to a significant decrease in this correlation. Here we discuss this puzzle. The decoherent states were ensured by forcing one of the annihilation photons through prior scattering before the Compton kinematics-based measurement of the polarization correlation. A comparison between the experimental setups used for the different measurements and the results obtained are briefly discussed, highlighting the parameters that are important for performing such measurements. Finally, the main features of the J-PET detector are presented with the schemes for performing similar measurements so that the results can be used as conclusive remarks for solving this puzzle. Solving the decoherence puzzle will have crucial consequences for basic studies of entanglement, as well as for the proposed application of polarisation of photons in positron emission tomography. In case if the correlation of polarisation of back-to-back photons from the electron-positron annihilation is the same before and after the scattering of these photons, then it will not be useful for the reduction of the scatter fraction in PET diagnostics. © 2022, CC BY.

关键词： Quantum entanglement

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Critical growth of cerebral tissue in organoids: theory and experiments

arXiv

引用

arXiv 2022年

作者： Kiselev, Egor I. Pflug, Florian von Haeseler, Arndt Vienna Austria Physics Department Technion Haifa320003 Israel Biological Complexity Unit Okinawa Institute of Science and Technology Graduate University Okinawa Onna904-0495 Japan Bioinformatics and Computational Biology Faculty of Computer Science University of Vienna Vienna Austria

We develop a Fokker-Planck theory of tissue growth with three types of cells (symmetrically dividing, asymmetrically dividing and non-dividing) as main agents to study the growth dynamics of human cerebral organoids. Fitting the theory to lineage tracing data obtained in next generation sequencing experiments, we show that the growth of cerebral organoids is a critical process. We derive analytical expressions describing the time evolution of clonal lineage sizes and show how power-law distributions arise in the limit of long times due to the vanishing of a characteristic growth scale. We discuss that the independence of critical growth on initial conditions could be biologically advantageous. Copyright © 2022, The Authors. All rights reserved.

关键词： Tissue

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Time-domain identification of distinct mechanisms for competing charge density waves in a rare-earth tritelluride

arXiv

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arXiv 2025年

作者： Su, Yifan Lv, B.Q. Zong, Alfred Müller, Aaron Chattopadhyay, Sambuddha Dolgirev, Pavel E. Singh, Anisha G. Straquadine, Joshua A.W. Choi, Dongsung Azoury, Doron Mogi, Masataka Fisher, Ian R. Demler, Eugene Gedik, Nuh Massachusetts Institute of Technology Department of Physics CambridgeMA02139 United States Tsung-Dao Lee Institute School of Physics and Astronomy Zhangjiang Institute for Advanced Study Shanghai Jiao Tong University Shanghai200240 China Departments of Physics and of Applied Physics Stanford University StanfordCA94305 United States SIMES SLAC National Accelerator Laboratory Menlo ParkCA94025 United States Institute for Theoretical Physics ETH Zürich Zürich8093 Switzerland Lyman Laboratory Department of Physics Harvard University CambridgeMA02138 United States Geballe Laboratory for Advanced Materials Stanford University StanfordCA94305 United States Department of Applied Physics Stanford University StanfordCA94305 United States Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science CambridgeMA02139 United States Department of Applied Physics University of Tokyo Bunkyo-ku Tokyo113-8656 Japan

Understanding the origin of phase transitions and the interactions between distinct phases remains a central task in condensed matter physics. Charge density wave (CDW) systems provide an ideal platform for investigating these phenomena. While the dominant CDW phases in many materials can be explained through Fermi surface nesting or electron-phonon interactions, certain CDW phase transitions remain poorly understood, challenging conventional paradigms. One notable example is rare-earth tritelluride ErTe3, which hosts two competing CDW orders. While the dominant CDW phase fits within the electron-phonon coupling framework, the formation mechanism of the subdominant CDW remains enigmatic. In this study, we combine time- and angle-resolved photoemission spectroscopy and time-dependent Ginzburg-Landau theory to establish a time-domain approach for probing phase transitions in solid-state systems. By analyzing the distinct recovery dynamics of the two CDW orders in ErTe3 following light excitation, we reveal a novel nucleation and growth mechanism that likely drives the secondary CDW phase transition. This work not only uncovers a previously unknown CDW formation mechanism in rare-earth tritellurides but also introduces a non-equilibrium framework for understanding phase transitions and phase competition in quantum materials. Copyright © 2025, The Authors. All rights reserved.

关键词： Charge density waves

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Multi-Agent Economic Modeling Automation Technologies

Multi-Agent Economic Modeling Automation Technologies

引用

International Conference on Control, Decision and Information Technologies (CoDIT)

作者： Aleksandra A. Zhukova Nikolai P. Pilnik Ivan G. Kamenev Batyrzhan B. Iusup-Akhunov Department of Mathematical Modelling in Economic Social and Ecological Systems Federal Research Center “Computer Science and Control” of the Russian Academy of Sciences Moscow Russian Federation Department of Mathematical Modelling of Economic Systems Federal Research Center “Computer Science and Control” of the Russian Academy of Sciences Moscow Russian Federation Department of Applied Economics Faculty of Economic Sciences HSE University Moscow Russian Federation Department of Fundamental Sciences-11 FSBEIHE Bauman Moscow State Technical University Moscow Russian Federation The Phystech School of Applied Mathematics and Informatics Moscow Institute of Physics and Technology Moscow Region Russian Federation

Complex economic models often describe the agent's decisions, i.e. choice of some controlled variables in accordance with criteria set by agents. Unlike purely statistical ones, agent-based models allow to describe processes with different modes, in which the agent's behavior changes quali-tatively when the environment (including the actions of other agents) change. The practical use of mathematical models of complex systems with a number of interacting agents is limited by complexity of their construction and possible errors when dealing with multitude of expressions. computer tools, such as the “Ecomod” system discussed in the article, can substantially reduce the time spent on model creation and processing, and help to coordinate the work of several researchers on the model.

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A discrete differential evolution for fuel loading optimization of the DNRR research reactor and comparison with genetic algorithm 45

A discrete differential evolution for fuel loading optimizat...

引用

45th Vietnam Conference on Theoretical physics, VCTP 2020

作者： Phan, Giang T. T. Tran, Hoai-Nam Do, Quang Binh Ngo, Quang Huy Institute of Fundamental and Applied Sciences Duy Tan University Ho Chi Minh City Viet Nam Faculty of Physics and Engineering Physics VNUHCM-University of Science Ho Chi Minh City Viet Nam Ho Chi Minh City University of Technology and Education Ho Chi Minh City Viet Nam

A discrete differential evolution (DE) method has been applied to the problem of fuel loading pattern optimization of the Dalat Nuclear Research Reactor (DNRR). A classic strategy DE/rand/l/bin was chosen for the mutation of the DE method. Numerical calculations have been performed based on the core configuration of 100 highly enriched uranium (HEU) fuel bundles with various burnup levels. Comparison of the performance between the DE method and a genetic algorithm (GA) was also carried out. The optimal LPs obtained from the two methods are significantly better than the reference core. DE is more advantageous in exploring search space and approaching a global optimum than GA. © Published under licence by IOP Publishing Ltd.

关键词： Genetic algorithms

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