Article
Engineering, Geological
Huaxiang Yan, Haijian Xie, Hamid Rajabi, Xiting Gu, Yun Chen
Summary: This study proposes an analytical solution for a one-dimensional and steady-state model to analyze the diffusion of VOCs within landfill capillary cover systems under unsaturated water flow and stable conditions. The research examines the impact of evaporation rate and clay thickness on coupled water flow and VOCs diffusion. The findings reveal the importance of considering unsaturated water flow in assessing VOC emissions in the cover system.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2023)
Article
Physics, Multidisciplinary
Vladislav Yu. Shishkov, Evgeny S. Andrianov, Anton V. Zasedatelev, Pavlos G. Lagoudakis, Yurii E. Lozovik
Summary: In this study, we analytically describe a nonequilibrium polariton Bose-Einstein condensate (BEC) by solving the master equation for the full polariton density matrix in the fast thermalization limit. We find that the density matrix of a nonequilibrium BEC incorporates quantum correlations between all polariton states, and the formation of BEC is accompanied by the emergence of cross-correlations between the ground state and the excited states. Despite being a nonequilibrium system, the average population of polariton states follows the Bose-Einstein distribution with an almost zero effective chemical potential above the condensation threshold, similar to an equilibrium BEC. Moreover, we demonstrate that the effective temperature of polaritons drops below the reservoir temperature above threshold.
PHYSICAL REVIEW LETTERS
(2022)
Article
Construction & Building Technology
Lin Li, Haohua Chen, Jingpei Li, De'an Sun
Summary: A semi-analytical solution considering the anisotropic permeability of the soil mass is proposed to assess the steady-state groundwater inflow into tunnels, which effectively avoids the distortion of the ground surface during conformal mapping. The solution is validated and parametric studies are conducted to investigate the effects of permeability ratio, tunnel depth, and water depths on the groundwater inflow.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yin Duan, Chuanxin Rong, Xianwen Huang, Wei Long
Summary: This study develops a simplified calculation model for the freeze-sealing pipe roof method by considering different soil freezing points, tube layout, and site conditions. The analytical solution of the freezing temperature field is obtained through conformal mapping and variable separation method. The accuracy of the solution is evaluated by analyzing numerical solutions and discussing the influence of parameter differences, providing a theoretical reference for the popularization and application of similar construction methods.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Mechanical
Songhan Zhang, Wei Fan, Caijin Yang
Summary: In this study, a joint harmonic balance and Fourier transform method is proposed to analyze the vehicle-induced vibration of an infinite beam carrying a vehicle. By separating the vehicle and beam as two subsystems and considering their nonlinear interaction, a semi-analytical steady-state periodic solution is obtained. The proposed method allows for accurate and efficient analysis of the steady-state periodic response of the vehicle-beam system. The effect of vehicle speed on the response is discussed, indicating the potential value for optimal design.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
J. Tindall, F. Schlawin, M. A. Sentef, D. Jaksch
Summary: A quantum system under coherent periodic driving can form stable states with off-diagonal long-range order and exhibit long-range particle-hole and spin-exchange correlations. By preserving symmetries, the driving can be utilized to create a unique condensate hosting both particle-hole and spin-wave order.
Article
Engineering, Chemical
Khalid A. Alnowibet, Adel F. Alrasheedi, Firdous S. Alqahtani
Summary: In material management, inventory systems can have positive impacts on material management but negative impacts on the relationship between facilities and customers. Traditional inventory models overlook the calculation of the stable distribution of inventory states for random demand. Therefore, a comprehensive analysis of inventory management systems requires considering the joint distribution of system stock levels and the number of requests.
Article
Mathematics
Fatemah Alsebai, Fatemah H. H. Al Mukahal, Mohammed Sobhy
Summary: This research investigates the thermo-piezoelectric bending of functionally graded porous piezoelectric plates reinforced with graphene platelets. A refined shear deformation plate theory is utilized and solved using numerical methods, considering the influences of graphene reinforcement.
Article
Materials Science, Multidisciplinary
A. Garcia-Fuente, D. Carrascal, G. Ross, J. Ferrer
Summary: Finite-length armchair graphene nanoribbons can exhibit one-dimensional topological properties with edge states, depending on their width and termination. We provide a complete solution for tight-binding graphene rectangles of any length and width, which can be seen as either finite-length armchair or zigzag ribbons. We derive exact expressions for the bulk and edge eigenstates and eigenenergies. We also investigate the Coulomb interactions among edge states and analyze the emergence and characteristics of different magnetic states at the edges using a Hubbard-dimer model.
Article
Engineering, Industrial
Neven Hadzic, Viktor Lozar, Tihomir Opetuk, Jerolim Andric
Summary: This paper discusses the development and application of analytical approach to splitting production systems modelling, as well as the use of finite state method as a semi-analytical model for the same problem. The developed modelling approach was successfully applied in a wood-processing facility and validated against factory-floor data.
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
(2022)
Article
Thermodynamics
Qinzhuo Liao, Gensheng Li, Shouceng Tian, Xianzhi Song, Gang Lei, Xu Liu, Weiqing Chen, Shirish Patil
Summary: Upscaling in petroleum reservoir simulation captures the dynamic behavior of fine-scale models at a coarser scale. This study presents an analytical approach for computing relative permeability, which is more accurate and efficient compared to numerical simulation.
Article
Engineering, Chemical
Lingyue Meng, Xujie Zhang, Yuqi Shang, Mingchuan Zhao, Jiasunle Li, Zhiwei Ge, Liejin Guo
Summary: In this study, a simplified steady-state mesoscale drag model was proposed and two new generalized expressions for mesoscale drag coefficient were derived. The simulation results demonstrated the accuracy and generality of the new model.
Article
Engineering, Multidisciplinary
J. Rouzegar, N. Salmanpour, F. Abad, L. Li
Summary: The main objective of this study is to develop an analytical solution for free vibration analysis of smart Functionally Graded (FG) plates using Levy solution in conjunction with state-space approach. The obtained results were compared with the existing literature to verify the accuracy of the proposed solution method and numerical algorithm. The effects of several parameters on the obtained results were examined.
Article
Physics, Multidisciplinary
Ido Tishby, Ofer Biham, Eytan Katzav
Summary: This study presents analytical results for the distribution of cover times of random walks on random regular graphs, showing very good agreement with results obtained from computer simulations. The analysis includes deriving a master equation for the distribution of the number of distinct nodes visited by the random walk, calculating the cumulative distribution of cover times, and determining the distributions of partial cover and random cover times.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Astronomy & Astrophysics
A. Shalchi
Summary: In the past two decades, scientists have significantly improved their understanding of the transport of energetic particles across magnetic fields. A new analytical theory for perpendicular transport has been developed in this paper, which aligns with previous research findings.
ASTROPHYSICAL JOURNAL
(2021)
Article
Optics
Ivan R. R. Gonzalez, Pablo I. R. Pincheira, Antonio M. S. Macedo, Leonardo de S. Menezes, Anderson S. L. Gomes, Ernesto P. Raposo
Summary: Random lasers are a special type of laser with stochastic intensity distribution, and different models are compared to describe this distribution. Stochastic differential models show excellent agreement with experimental data, indicating their capability to capture the influence of high-order nonlinearities on the intensity distribution of random lasers.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Optics
Edwin Coronel, Avishek Das, Ivan R. R. Gonzalez, Anderson S. L. Gomes, Walter Margulis, J. P. von der Weid, Ernesto P. Raposo
Summary: The study examines the correlations between intensity fluctuations and RSB behavior of the HEAR laser, revealing the existence of replica symmetric ASE regime and RSB phase with random lasing emission at different thresholds. In the RSB phase, stochastic dynamics of lasing modes lead to competition for gain intertwined with correlation and anti-correlation.
Article
Physics, Condensed Matter
Y. Vielza, A. Cabo Montes de Oca, M. D. Coutinho-Filho, E. P. Raposo
Summary: In this study, the pseudogap phase of cuprate superconducting systems was investigated using a Hartree-Fock approach. The findings suggest that the presence of a pseudogap is caused by limiting electron dispersion along the nodal directions and a significant on-site Coulomb repulsion, consistent with experimental results.
EUROPEAN PHYSICAL JOURNAL B
(2022)
Article
Multidisciplinary Sciences
Edwin D. Coronel, Manoel L. da Silva-Neto, Andre L. Moura, Ivan R. R. Gonzalez, Roberta S. Pugina, Eloisa G. Hilario, Euzane G. da Rocha, Jose Mauricio A. Caiut, Anderson S. L. Gomes, Ernesto P. Raposo
Summary: The study demonstrates the intricate interplay of photonic intermittency turbulent-like effects, dynamics evolution of modes correlations, and onset of RSB behavior in random lasers (RLs), proposing modified Pearson correlation coefficients as sensitive indicators. The findings suggest potential common underlying mechanisms among these phenomena which could be further explored in unified theoretical models.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
Ernesto P. Raposo, Anderson S. L. Gomes, Cid B. de Araujo
Summary: This article introduces the winners of the 2021 Physics Nobel Prize and their groundbreaking contributions to our understanding of complex physical systems, and comments on the research group's work on the complex system properties of random lasers and random fiber lasers.
MOMENTO-REVISTA DE FISICA
(2022)
Editorial Material
Optics
A. S. L. Gomes, C. B. de Araujo, A. M. S. Macedo, I. R. R. Gonzalez, L. de S. Menezes, P. I. R. Pincheira, R. Kashyap, G. L. Vasconcelos, E. P. Raposo
Summary: A recent study has established a photonic connection between turbulence and spin glasses using a random fiber laser as a platform, bridging the works of two 2021 Nobel laureates in Physics.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Physics, Multidisciplinary
Gandhimohan M. Viswanathan, Marco Aurelio G. Portillo, Ernesto P. Raposo, Marcos G. E. da Luz
Summary: This paper discusses the exact solution of the Ising model on the simple cubic lattice and states the difficulty in finding an analytic expression for the partition function Z. Clear-cut criteria are presented for any claimed exact expression, and previous mistaken solutions are discussed.
Article
Physics, Multidisciplinary
H. Felippe, A. Viol, D. B. De Araujo, M. G. E. Da Luz, F. Palhano-Fontes, H. Onias, E. P. Raposo, G. M. Viswanathan
Summary: There is a demand for a reliable method to estimate the entropy associated with correlations in diverse fields. Estimating a unique entropy directly from the Pearson correlation matrix has remained an open problem for over 50 years. Existing approaches lack generality as they require thresholding choices that remove possibly important information. In this study, we propose an objective procedure to estimate a unique entropy of a general Pearson matrix without the need for thresholding. We demonstrate the method by estimating the entropy from neuroimaging time series of the human brain under the influence of a psychedelic.
Article
Multidisciplinary Sciences
Pauline Formaglio, Marina E. Wosniack, Raphael M. Tromer, Jaderson G. Polli, Yuri B. Matos, Hang Zhong, Ernesto P. Raposo, Marcos G. E. da Luz, Rogerio Amino
Summary: Plasmodium sporozoites actively migrate in the dermis and enter blood vessels to induce infection. Through intravital imaging, researchers found that sporozoites adopt a strategy of alternating global superdiffusive skin exploration and local subdiffusive blood vessel exploitation, enabling them to find intravasation hotspots associated with pericytes, enter the bloodstream and initiate malaria infection.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Guillermo Palacios, Andre C. A. Siqueira, Cid B. de Araujo, Anderson S. L. Gomes, Ernesto P. Raposo
Summary: In this study, the phenomenon of replica symmetry breaking (RSB) was investigated in random lasers (RLs) through Monte Carlo simulations. The study revealed that photonic random walkers diffuse and get randomly scattered in the active medium, interacting with both the population of excited atoms and each other. When the interactions among photonic walkers are not included, a replica-symmetric distribution for the Parisi overlap parameter (P(q)) at q = 0 is found for any excitation energy. The study also examined the statistical correlations of intensity fluctuations in different modes of the same spectrum, finding consistency with experimental results in RL materials.
Article
Materials Science, Multidisciplinary
Kacio Mello, Jose E. Abrao, Eduardo S. Santos, Joaquim B. S. Mendes, Ernesto P. Raposo, Antonio Azevedo
Summary: The study found that Bismuth does not follow the expected rule of heavy metal materials to convert spin current to charge current efficiently. In addition, Bismuth exhibits an exotic spin relaxation mechanism and functions as a classifier.
Article
Optics
Edwin D. Coronel, Avishek Das, Manoel L. da Silva-Neto, Ivan R. R. Gonzalez, Anderson S. L. Gomes, Ernesto P. Raposo
Summary: In this study, the statistical properties of intensity fluctuations in a multimode Q-switched Nd:yttrium aluminum garnet laser were investigated using a modified Pearson correlation coefficient. It was found that above threshold, the system exhibits a photonic ferromagnetic-like spontaneous mode-locking phase with replica symmetry breaking. Different from photonic glassy phase in random lasers, a relevant fraction of modes oscillate coherently in this system, but the synchronous oscillation of some modes is frustrated with the replica symmetry breaking.
Article
Physics, Fluids & Plasmas
L. G. P. Carames, Y. B. Matos, F. Bartumeus, C. G. Bezerra, T. Macri, M. G. E. da Luz, E. P. Raposo, G. M. Viswanathan
Summary: Levy flight foraging hypothesis suggests that Levy walk search strategies optimize the search efficiency in foraging with unrestricted revisits. The study provides rigorous evidence supporting the optimality of inverse square Levy walks in such scenarios.
Article
Physics, Fluids & Plasmas
Danillo B. de Souza, Hugo A. Araujo, Gerson C. Duarte-Filho, Eamonn A. Gaffney, Fernando A. N. Santos, Ernesto P. Raposo
Summary: In this study, we investigated the infectious disease dynamics of the stochastic susceptible-infected-recovered (SIR) model using the Fock-space approach. The model, driven by a master equation, provides transition probabilities among the system's states and exact analytic expressions for the Hamiltonian eigenvalues. Our approach introduces a powerful set of tools for calculating central quantities of epidemic processes, especially for relatively small populations.
Article
Optics
Ernesto P. Raposo, Ivan R. R. Gonzalez, Edwin D. Coronel, Antonio M. S. Macedo, Leonardo de S. Menezes, Raman Kashyap, Anderson S. L. Gomes, Robin Kaiser
Summary: The study proposes an approach based on random matrix theory to calculate the temporal second-order intensity correlation function of radiation emitted by random lasers, finding excellent agreement with experimental data and discussing the extension of the method to address the statistical properties of general disordered photonic systems.
