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Oil-source correlation and Paleozoic source rock analysis in the Siwa Basin,Western Desert:Insights from well-logs,Rock-Eval pyrolysis,and biomarker data

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Energy Geoscience 2024年第3期5卷 313-327页

作者： Mohamed I.Abdel-Fattah Mohamed Reda Mohamed Fathy Diaa A.Saadawi Fahad Alshehri Mohamed S.Ahmed Petroleum Geosciences and Remote Sensing Program Department of Applied Physics and AstronomyCollege of SciencesUniversity of SharjahSharjah27272United Arab Emirates Geology Department Faculty of ScienceSuez Canal UniversityIsmailiaEgypt Faculty of Science Geology DepartmentAl-Azhar UniversityP.O.Box 11884Nasr CityCairoEgypt Abdullah Alrushaid Chair for Earth Science Remote Sensing Research Geology and Geophysics DepartmentCollege of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

Understanding the origins of potential source rocks and unraveling the intricate connections between reservoir oils and their source formations in the Siwa Basin(Western Desert,Egypt)necessitate a thorough oil-source correlation *** objective is achieved through a meticulous analysis of well-log responses,Rock-Eval pyrolysis,and biomarker *** analysis of Total Organic Carbon across 31 samples representing Paleozoic formations in the Siwa A-1X well reveals a spectrum of organic richness ranging from 0.17 wt%to 2.04 wt%,thereby highlighting diverse levels of organic content and the presence of both Type II and Type III *** of the fingerprint characteristics of eight samples from the well suggests that the Dhiffah Formation comprises a blend of terrestrial and marine organic ***,a significant contribution from more oxidized residual organic matter and gas-prone Type III kerogen is ***,the Desouky and Zeitoun formations exhibit mixed organic matter indicative of a transitional environment,and thus featuring a pronounced marine influence within a more reducing setting,which is associated with Type II *** analysis of five oil samples from different wells—SIWA L-1X,SIWA R-3X,SIWA D-1X,PTAH 5X,and PTAH 6X,it is evident that terrestrial organic matter,augmented by considerable marine input,was deposited in an oxidizing environment,and contains Type III *** scrutiny confirms the coexistence of mixed terrestrial organic matter within varying redox *** is the uniformity of identified kerogen Types II and III across all samples,known to have potential for hydrocarbon *** discovery presented in this paper unveils captivating prospects concerning the genesis of oil in the Jurassic Safa reservoir,suggesting potential links to Paleozoic sources or even originating from the Safa Member *** revelations mark a substantial advancement in understanding source

关键词： Biomarker data Oil-source correlation Rock-Eval pyrolysis Source rocks Siwa Basin

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Entanglement detection with trace polynomials

arXiv

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arXiv 2023年

作者： Rico, Albert Huber, Felix Faculty of Physics Astronomy and Applied Computer Science Institute of Theoretical Physics Jagiellonian University Kraków30-348 Poland

We provide a systematic method for nonlinear entanglement detection based on trace polynomial inequalities. In particular, this allows to employ multi-partite witnesses for the detection of bipartite states, and vice versa. We identify pairs of entangled states and witnesses for which linear detection fails, but for which nonlinear detection succeeds. With the trace polynomial formulation a great variety of witnesses arise from immanant inequalities, which can be implemented in the laboratory through the randomized measurements toolbox. Copyright © 2023, The Authors. All rights reserved.

关键词： Polynomials

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Clean-Up Laser System for the Remote Terminal of an Optical Clock

Clean-Up Laser System for the Remote Terminal of an Optical ...

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European Frequency and Time Forum (EFTF)

作者： Przemysław Krehlik Łukasz Śliwczyński Łukasz Buczek Tomasz Kawalec Adam Wojciechowski Antoni Węglarz Jakub Dobosz Faculty of Computer Science Electronics and Telecommunications AGH University of Krakow Poland Faculty of Physics Astronomy and Computer Science Jagiellonian University in Krakow Poland Faculty of Physics University of Warsaw Poland

ISBN: (数字)9798350354270

ISBN: (纸本)9798350354287

In this work we present the concept and verification of the ULE cavity based clean-up system for a remote terminal of an optical atomic clock. Thanks to this solution the short-term stability of the signal provided by a long-haul optical fiber link is be significantly improved, to the level guaranteed by the high-finesse cavity, incorporated in the clean-up setup.

关键词： Optical fibers Time-frequency analysis Atom optics Europe Laser stability Optical fiber communication Fiber lasers Atomic clocks

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Improving Group Lasso for High-Dimensional Categorical Data 23rd

Improving Group Lasso for High-Dimensional Categorical Data

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23rd International Conference on Computational science, ICCS 2023

作者： Nowakowski, Szymon Pokarowski, Piotr Rejchel, Wojciech Soltys, Agnieszka Institute of Applied Mathematics and Mechanics University of Warsaw Warsaw Poland Faculty of Physics University of Warsaw Warsaw Poland Faculty of Mathematics and Computer Science Nicolaus Copernicus University Toruń Poland

ISBN: (纸本)9783031360206

Sparse modeling or model selection with categorical data is challenging even for a moderate number of variables, because roughly one parameter is needed to encode one category or level. The Group Lasso is a well known efficient algorithm for selection of continuous or categorical variables, but all estimates related to a selected factor usually differ. Therefore, a fitted model may not be sparse, which makes the model interpretation difficult. To obtain a sparse solution of the Group Lasso, we propose the following two-step procedure: first, we reduce data dimensionality using the Group Lasso;then, to choose the final model, we use an information criterion on a small family of models prepared by clustering levels of individual factors. In the consequence, our procedure reduces dimensionality of the Group Lasso and strongly improves interpretability of the final model. What is important, this reduction results only in the small increase of the prediction error. In the paper we investigate selection correctness of the algorithm in a sparse high-dimensional scenario. We also test our method on synthetic as well as the real data sets and show that it outperforms the state of the art algorithms with respect to the prediction accuracy, model dimension and execution time. Our procedure is contained in the R package DMRnet and available in the CRAN repository. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Forecasting

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Quantifying electrochemical losses in perovskite solar cells

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Journal of Materials Chemistry C 2023年第8期11卷 2911-2920页

作者： Tulus, None Wang, Junke Galagan, Yulia von Hauff, Elizabeth Physics of Energy Department of Physics & Astronomy Faculty of Sciences Vrije Universiteit Amsterdam Amsterdam1081 HV Netherlands Jakarta10340 Indonesia TNO - Solliance Eindhoven5656 AE Netherlands National Taiwan University Department of Materials Science and Engineering Taipei106 Taiwan Faculty of Electrical and Computer Engineering Technical University of Dresden Dresden Germany Dresden Germany

We quantify electrochemical losses in perovskite solar cells (PSCs) based on methylammonium lead triiodide (MAPbI3) films with impedance analysis. We focus on the characteristic signatures of impedance spectra taken from PSCs, in particular the negative capacitance hook widely observed in the low frequency regime. We elucidate the underlying physical origin for the negative capacitance by applying a generalized equivalent circuit model (ECM) for PSCs that accounts for fast electrical dynamics resulting in high frequency (HF) signatures due to electronic processes, and much slower electrochemical dynamics that result in low frequency (LF) signatures in the spectra. We observe relaxation times faster than 10−6 s in the HF regime that can be attributed to electrical dynamics, while relaxation times longer than 10−3 s in the LF regime that are consistent with electrochemical dynamics. The voltage-dependence and timescales of the electrochemical dynamics are consistent with MA+ and I− migration in the MAPbI3 absorber layer. At higher applied voltages, we observe a highly non-linear response from the PSC which is consistent with irreversible chemical changes in the MAPbI3 absorber. We demonstrate how ECM modelling combined with the analysis of ECM fit quality is a useful approach for in situ monitoring and quantitative diagnosis of loss mechanisms in PSC. © 2023 The Royal Society of Chemistry.

关键词： Relaxation time

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Role of long jumps in Lévy noise induced multimodality

arXiv

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arXiv 2024年

作者： Pogorzelec, Przemyslaw Dybiec, Bartlomiej Doctoral School of Exact and Natural Sciences Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Lojasiewicza 11 Kraków30-348 Poland Institute of Theoretical Physics Mark Kac Center for Complex Systems Research Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Lojasiewicza 11 Kraków30-348 Poland

Lévy noise is a paradigmatic noise used to describe out-of-equilibrium systems. Typically, properties of Lévy noise driven systems are very different from their Gaussian white noise driven counterparts. In particular, under action of Lévy noise, stationary states in single-well, super-harmonic, potentials are no longer unimodal. Typically, they are bimodal however for fine-tuned potentials the number of modes can be further increased. The multimodality arises as a consequence of the competition between long displacements induced by the non-equilibrium stochastic driving and action of the deterministic force. Here, we explore robustness of bimodality in the quartic potential under action of the Lévy noise. We explore various scenarios of bounding long jumps and assess their ability to weaken and destroy multimodality. In general, we demonstrate that despite its robustness it is possible to destroy the bimodality, however it requires drastic reduction in the length of noise-induced jumps. Copyright © 2024, The Authors. All rights reserved.

关键词： Stochastic systems

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Universality of random-site percolation thresholds for two-dimensional complex noncompact neighborhoods

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Physical Review E 2024年第3期109卷 034108-034108页

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

The phenomenon of percolation is one of the core topics in statistical mechanics. It allows one to study the phase transition known in real physical systems only in a purely geometrical way. In this paper, we determine thresholds pc for random-site percolation in triangular and honeycomb lattices for all available neighborhoods containing sites from the sixth coordination zone. The results obtained (together with the percolation thresholds gathered from the literature also for other complex neighborhoods and also for a square lattice) show the power-law dependence pc∝(ζ/K)−γ with γ=0.526(11), 0.5439(63), and 0.5932(47), for a honeycomb, square, and triangular lattice, respectively, and pc∝ζ−γ with γ=0.5546(67) independently on the underlying lattice. The index ζ=∑iziri stands for an average coordination number weighted by distance, that is, depending on the coordination zone number i, the neighborhood coordination number zi, and the distance ri to sites in the ith coordination zone from the central site. The number K indicates lattice connectivity, that is, K=3, 4, and 6 for the honeycomb, square, and triangular lattice, respectively.

关键词： Percolation Phase transitions Finite-size scaling Monte Carlo methods

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MIRROR MATTER IN ORTHO-POSITRONIUM DECAY SEARCHES USING THE J-PET DETECTOR

Acta Physica Polonica B, Proceedings Supplement

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Acta Physica Polonica B, Proceedings Supplement 2024年第7期17卷

作者： Mędrala-Sowa, Justyna Perez del Rio, Elena Moskal, Pawel Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków30-348 Poland Centre for Theranostics Jagiellonian University Kraków31-501 Poland

Positronium (Ps), governed by Quantum Electrodynamics (QED), provides a rich domain for exploring fundamental physics. Monte Carlo simulations of its decay provide insights into various aspects of particle physics. The development of J-PET, an innovative tomography system at the Jagiellonian University using high-resolution scintillator detectors, facilitates interdisciplinary studies encompassing fundamental physics tests, medical research, and quantum entanglement measurements but also enhances our capacity to investigate positronium decays in pursuit of potential dark matter (DM) candidates, a lingering enigma within the current Standard Model (SM) framework. In our research, we employ the J-PET detector to study ortho-positronium (o-Ps) decays as a part of our ongoing quest for the discovery of DM. Our primary goal is to explore mirror matter, which seeks to restore parity invariance and is proposed as a candidate for the Universe’s DM. Our study aims to push the boundaries of precision measurement in the decay width of o-Ps to three gamma quanta, contributing to our understanding of the elusive nature of dark matter. The article presents the preliminary lifetime distribution of o-Ps as a search for mirror matter obtained from data collected during a portion of a long-term measurement conducted with the J-PET detector in 2020. The long-term aim of the study is to achieve 10−6 lifetime sensitivity. © 2024 Jagiellonian University. All rights reserved.

关键词： Mirrors

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TOWARDS STUDIES OF RARE DECAYS OF POSITRONIUM WITH J-PET

Acta Physica Polonica B, Proceedings Supplement

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Acta Physica Polonica B, Proceedings Supplement 2024年第1期17卷 1A91-1A98页

作者： Tanty, Pooja del Rio, Elena Perez Moskal, Pawel Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków30-348 Poland Centre for Theranostics Jagiellonian University Kraków31-501 Poland

The positronium system, a bound state of an electron and a positron, is suitable for testing the predictions of quantum electrodynamics (QED) as well as symmetry invariance. The Ps triple state, the ortho-Positronium (o-Ps), which mainly decays to three photons, is further studied to search for decays into 4γ and 5γ, the former C-violating decay and the latter never observed. The J-PET is a multi-purpose detector optimized for the detection of photons from positron–electron annihilation and can be used in a broad scope of interdisciplinary investigation. The large acceptance and high angular resolution of the J-PET detector will push the present limits in these forbidden and rare decays. The aim is to reach a sensitivity below O(10−6) while reducing the uncertainties, thus increasing the sensitivity. © 2024 Jagiellonian University. All rights reserved.

关键词： Positrons

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

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Physical Review A 2024年第5期110卷 053105-053105页

作者： Jan H. Thiede Jakub S. Prauzner-Bechcicki Fachbereich Physik Philipps-Universität Marburg D-35032 Marburg Germany Jagiellonian University in Kraków Faculty of Physics Astronomy and Applied Computer Science Marian Smoluchowski Institute of Physics Łojasiewicza 11 30-348 Krakow Poland

The full-dimensional quantum mechanical description of double ionization in strong laser fields is still computationally very demanding. We demonstrate the versatility of a simplified (1+1)-dimensional model of the He atom, which allows the study of nonsequential double ionization in strong laser fields over a wide range of frequencies and intensities. The ionization yield, longitudinal ion momentum distributions, and two-electron momentum distributions obtained by using the applied approach are in good agreement with the experimental and semi-classical data available in the literature, thus complementing them with a quantum mechanical description. The methodology can be extended to other atomic species or to study higher ionization.

关键词： Atomic & molecular processes in external fields Electronic excitation & ionization Multiphoton or tunneling ionization & excitation Atoms Dipole approximation First-principles calculations Nonperturbative methods Schroedinger equation

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