Article
Computer Science, Artificial Intelligence
Nancy Solis Garcia, Jose Guadalupe Flores Muniz, Viacheslav Kalashnikov, Nataliya Kalashnykova, Olga Kosheleva
Summary: According to economics, prices are determined by the relationship between supply and demand, and in most cases, prices are uniquely determined by the equilibrium between supply and demand. However, there are situations where the equilibrium is not unique.
Article
Multidisciplinary Sciences
Benjamin D. Strycker
Summary: Despite years of research on Raman phenomena, the issue of unifying spontaneous and stimulated Raman scattering into a set of partial differential equations persists. This problem is solved by formulating quantum dynamics in the Heisenberg picture, with a focus on time and normal-ordering of operators. The technique is demonstrated through application to various systems, with validation through analytical and numerical comparison.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Multidisciplinary
Shu-Chiuan Chang, Robert Shrock
Summary: In this paper, we investigate the measures of spin ordering in the q-state ferromagnetic Potts model under the influence of a generalized external magnetic field that favors or disfavors spin values in a subset Is = {1, ... , s} of the total set of q values. The findings are compared with the corresponding measures of spin ordering in the case of a conventional external magnetic field that favors or disfavors a single spin value out of the total set of q values. Illustrative calculations are provided.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2023)
Article
Chemistry, Physical
Soumita Maiti, Sangchul Roh, Itai Cohen, Nicholas L. Abbott
Summary: This study explores the non-equilibrium interfacial behaviors of thermotropic liquid crystals and finds that the reordering of the liquid crystals is mainly caused by interfacial shearing. Simple methods for mapping interfacial velocities and investigating surfactant-driven flows are established, revealing the importance of surface advection and surfactant desorption. The dynamic states adopted by the liquid crystals in the presence of surfactant concentration gradients offer new opportunities for engineering complex fluids beyond equilibrium.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Kalyan Immadisetty, Adithya Polasa, Reid Shelton, Mahmoud Moradi
Summary: This study elucidates the activation mechanism of an engineered MscL at an atomic level and reveals the key roles of periplasmic loops and the loss of various peptide interactions in the activation process. The findings provide insights for engineering more efficient pH-sensing mechanosensitive channels.
COMPUTATIONAL AND STRUCTURAL BIOTECHNOLOGY JOURNAL
(2022)
Article
Computer Science, Interdisciplinary Applications
R. F. Dutra, M. S. Santos Junior, D. Messias, C. V. C. Mendes, M. O. Sales, F. A. B. F. de Moura
Summary: In this paper, we studied a square lattice with correlated random hopping terms under an external electric field. By using a Taylor formalism to solve the Schrodinger dynamic equation, we analyzed the dynamics of an initially localized electronic wave packet. Our calculations showed that the correlated disorder promotes fast electronic propagation for intermediate times. When a static electric field is applied, we observed oscillatory behavior similar to the well-known Bloch oscillations. The frequency of these oscillations was calculated and found to be in good agreement with predictions from the semi-classical approach used in crystalline lattices. We discussed the stability of these apparent Bloch oscillations based on the local disorder and the absence of extended states in our model.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2023)
Article
Materials Science, Multidisciplinary
Yu. S. Orlov, S. Nikolaev, V. I. Kuz'min, A. E. Zarubin, S. G. Ovchinnikov
Summary: This study investigates the effects of interatomic hoppings of excitons and the formation of excitonic Bose condensate on strongly correlated spin crossover systems, using the effective Hamiltonian for the two-band Kanamori model. It is found that antiferromagnetic ordering occurs due to exciton order, even in the absence of interatomic exchange interaction. The spectrum of excitonic excitations is calculated at various points on the temperature vs crystal field phase diagram, revealing a gap outside the exciton ordering region that disappears at the boundary of the exciton condensate phase, as well as a nonuniform spectral weight distribution over the Brillouin zone.
Article
Chemistry, Medicinal
Rafael G. Viegas, Murilo N. Sanches, Alan A. A. Chen, Fernando V. Paulovich, Angel E. Garcia, Vitor B. P. Leite
Summary: Molecular dynamics (MD) simulations are powerful tools for studying the folding pathways of biomolecules. In this study, we used MD simulations to investigate the folding of an RNA tetraloop and analyzed the dynamics using the energy landscape visualization method (ELViM). Our results provide insights into the folding process of the tetraloop and demonstrate the potential of ELViM for studying biomolecules.
JOURNAL OF CHEMICAL INFORMATION AND MODELING
(2023)
Article
Materials Science, Multidisciplinary
C. B. Larsen, E. Canevet, D. G. Mazzone, Ch. Ruegg, B. Fak, D. F. McMorrow, E. Ressouche, G. J. McIntyre, S. L. Bud'ko, P. C. Canfield, O. Zaharko
Summary: The magnetic behavior of YbAgGe was studied, revealing multiple magnetic phase transitions, non-Fermi liquid states, and a possible quantum critical point. Different magnetic phases were observed under varying external magnetic fields, with structural refinements showing strong modulation of magnetic moment amplitudes. While the ordered moments are primarily aligned in the hexagonal plane, there is also a significant out-of-plane component and a ferromagnetic contribution above 2 T. Further research is needed to better understand the microscopic interactions in this material.
Article
Computer Science, Artificial Intelligence
Yongjing Yin, Shaopeng Lai, Linfeng Song, Chulun Zhou, Xianpei Han, Junfeng Yao, Jinsong Su
Summary: Sentence ordering is a crucial task in text coherence modeling, aiming to organize sentences coherently by capturing global dependencies. This paper introduces a novel graph-based neural network model enhanced with external knowledge, which significantly outperforms existing state-of-the-art models based on experimental results on benchmark datasets.
JOURNAL OF ARTIFICIAL INTELLIGENCE RESEARCH
(2021)
Article
Construction & Building Technology
Bart Merema, Dirk Saelens, Hilde Breesch
Summary: In educational buildings, the HVAC system plays a major role in energy consumption. This study developed a model predictive control (MPC) framework for an all-air system to control room temperature and CO2 concentrations. Two model identification techniques, autoregressive with exogenous input (ARX-MPC) and grey-box resistor-capacitor nonlinear model (RC-NMPC), were compared. The study showed that the ARX-MPC had advantages in simplicity and computational efficiency. The implemented MPC strategies in a real-use educational building achieved energy savings of 10%-40% for electric energy use and 21%-55% for thermal energy use.
BUILDING AND ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Francois Gay-Balmaz, Hiroaki Yoshimura
Summary: This paper presents a systematic approach to modelling in non-equilibrium thermodynamics by introducing the notion of interconnections and extending the variational principle in mechanics. It demonstrates how a non-equilibrium thermodynamic system can be seen as an interconnected system of primitive physical elements or subsystems. This approach offers a promising direction for developing a unified description in various scientific areas.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Review
Chemistry, Physical
Shiyue Wu, Xiaoqing Yang, Heng Jing, Yue Chu, Jianping Yuan, Zhanxia Zhu, Kama Huang
Summary: In this study, the effect of external electric fields on the interaction between sulfur dioxide and water was investigated using density functional theory (DFT) and molecular dynamics (MD) methods. The results showed that the electric field reduces the binding energy between sulfur dioxide and water, inhibits the diffusion of sulfur dioxide, and decreases its solubility.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Multidisciplinary Sciences
Falko Schmidt, Hana Sipova-Jungova, Mikael Kaell, Alois Wuerger, Giovanni Volpe
Summary: Active nanoparticles in a critical solution show behavior far from equilibrium, with fast orbital rotations observed around the beam axis even with an increase in effective temperature.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Isao Ishii, Yuki Kurata, Yuki Wada, Minoru Nohara, Takashi Suzuki, Koji Araki, Alexander V. Andreev
Summary: We conducted ultrasonic measurements on ErNiAl and discovered a phase transition at T-Q, below the antiferromagnetic transition temperature T-N. This transition is characterized by a significant elastic softening of C-66 and ultrasonic attenuation, indicating the presence of O-xy-type ferroquadrupolar ordering in a magnetically ordered state at zero magnetic field.
Article
Multidisciplinary Sciences
Joan Benach, Lucinda Cash-Gibson, Diego F. Rojas-Gualdron, Alvaro Padilla-Pozo, Juan Fernandez-Gracia, Victor M. Eguiluz
Summary: The COVID-19 pandemic has highlighted the urgent need for empirical research on health inequalities to effectively respond to global threats. A bibliometric and network analysis of COVID-19 associated inequalities research using the Scopus database reveals a highly collaborative field with both similarities and new dynamics compared to pre-COVID-19 global health inequalities research. It is crucial to invest in global health inequalities research capacities to address growing social inequalities and prepare for future crises.
Article
Multidisciplinary Sciences
Freya C. Womersley, Nicolas E. Humphries, Nuno Queiroz, Marisa Vedor, Ivo da Costa, Miguel Furtado, John P. Tyminski, Katya Abrantes, Gonzalo Araujo, Steffen S. Bach, Adam Barnett, Michael L. Berumen, Sandra Bessudo Lion, Camrin D. Braun, Elizabeth Clingham, Jesse E. M. Cochran, Rafael de la Parra, Stella Diamant, Alistair D. M. Dove, Christine L. Dudgeon, Mark Erdmann, Eduardo Espinoza, Richard Fitzpatrick, Jaime Gonzalez Cano, Jonathan R. Green, Hector M. Guzman, Royale Hardenstine, Abdi Hasan, Fabio H. Hazin, Alex R. Hearn, Robert E. Hueter, Mohammed Y. Jaidah, Jessica Labaja, Felipe Ladino, Bruno C. L. Macena, John J. Morris Jr, Bradley M. Norman, Cesar Penaherrera-Palma, Simon J. Pierce, Lina M. Quintero, Deni Ramirez-Macias, Samantha D. Reynolds, Anthony J. Richardson, David P. Robinson, Christoph A. Rohner, David R. L. Rowat, Marcus Sheaves, Mahmood S. Shivji, Abraham B. Sianipar, Gregory B. Skomal, German Soler, Ismail Syakurachman, Simon R. Thorrold, D. Harry Webb, Bradley M. Wetherbee, Timothy D. White, Tyler Clavelle, David A. Kroodsma, Michele Thums, Luciana C. Ferreira, Mark G. Meekan, Lucy M. Arrowsmith, Emily K. Lester, Megan M. Meyers, Lauren R. Peel, Ana M. M. Sequeira, Victor M. Eguiluz, Carlos M. Duarte, David W. Sims
Summary: Marine traffic is increasing globally, but collisions between ships and endangered megafauna are often undetected or unreported. By tracking the movements of whale sharks and vessel activity, it was found that there is a significant overlap between shark's space use and large vessel traffic. High collision risks were observed in major oceans, particularly with cargo and tanker vessels, concentrated in gulf regions where dense traffic coincides with shark movements. This study highlights the importance of mitigating ship-strike risks to protect species like whale sharks from the impact of growing global vessel traffic.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Tomasz Raducha, Maxi San Miguel
Summary: This study investigates the role of local effects and finite size effects in reaching coordination and equilibrium selection in two-player coordination games. The findings show that coordination can be achieved under specific connectivity conditions, and the combination of local effects and update rules is crucial for achieving coordination on the payoff-dominant strategy.
SCIENTIFIC REPORTS
(2022)
Article
Mathematics, Interdisciplinary Applications
Agnieszka Czaplicka, Christos Charalambous, Raul Toral, Maxi San Miguel
Summary: This study explores the dynamics of the voter model in the presence of confidence and bias. Analytical and numerical methods are used to investigate the impact of biased voters and their connectivity on the time and probability of achieving consensus. The findings suggest that the time to consensus increases with the fraction of biased voters and the degree of bias. Furthermore, different strategies for generating random network topologies can significantly affect the efficiency of reaching consensus and the influence of biased groups.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Multidisciplinary Sciences
Fernando Diaz-Diaz, Maxi San Miguel, Sandro Meloni
Summary: In this study, we investigate the emergence of information transmission biases in synthetic scale-free homophilic/heterophilic networks by considering the interplay between network structural properties and information dynamics. We propose simple mathematical tools to quantify these biases. Both Simple and Complex Contagion models fail to accurately predict significant biases, while a Hybrid Contagion model, incorporating both Simple and Complex Contagion, exhibits three homophily-dependent biases: emissivity and receptivity biases, and echo chambers. Our findings are further confirmed through simulations on an empirical network with high homophily. These results shed light on the mechanisms that lead to inequalities in information source visibility, reduced access to information, and lack of communication among distinct groups.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
David Abella, Maxi San Miguel, Jose J. Ramasco
Summary: The Schelling model, a paradigm in social sciences, is used to explain residential spatial segregation. The inclusion of aging effect in a noisy constrained version of the Schelling model has major impacts on its statics and dynamics.
SCIENTIFIC REPORTS
(2022)
Article
Mathematics, Applied
Jorge P. Rodriguez, Victor M. Eguiluz
Summary: Interactions between different diseases can alter their dynamics, posing uncertainty in modeling empirical data when the symptoms of both infections are indistinguishable. By extending previously proposed models to non-symmetric scenarios, we demonstrate that both cooperative and competitive interactions lead to synchronization of the maximum fraction of infected individuals. Using a model that combines the dynamics of COVID-19 and seasonal influenza, we show that the coupling synchronizes both infections, with a stronger influence on influenza dynamics.
Article
Biodiversity Conservation
Gian Marco Palamara, Alejandro Rozenfeld, Charles N. de Santana, Jan Klecka, Rodrigo Riera, Victor M. Eguiluz, Carlos J. Melian
Summary: This study examines the impact of fluctuations in landscape connectivity on biodiversity dynamics. The results show that local and regional species richness can increase together in dynamic landscapes, and fluctuations in connectivity can increase the overall number of coexisting species. This clarifies the empirical findings of high biodiversity in both low and high-connected landscapes.
Article
Physics, Multidisciplinary
Byungjoon Min, Maxi San Miguel
Summary: We study the coevolutionary dynamics of network topology and social complex contagion using a threshold cascade model. The coevolving dynamics significantly affect the cascade dynamics, with the rewiring process suppressing the onset of global cascades. Non-adopting nodes form denser connections during evolution, resulting in a wider degree distribution and a non-monotonous dependence of cascades sizes on plasticity.
Article
Multidisciplinary Sciences
Francesc Belvis, Alberto Aleta, Alvaro Padilla-Pozo, Juan-M. Pericas, Juan Fernandez-Gracia, Jorge P. Rodriguez, Victor M. Eguiluz, Charles Novaes De Santana, Mireia Julia, Joan Benach
Summary: This research examines the evolution of COVID-19 incidence rates and effective reproduction number R(t), as well as their relationship with spatial autocorrelation patterns in Catalonia, Spain. The study finds that there were five major outbreaks, all preceded by R(t) values greater than 1 in the previous two weeks. There is no clear pattern in the initial focus of each wave. Spatial autocorrelation follows a baseline pattern, but deviations occur in some waves, which can be reproduced through interventions to reduce mobility and virus transmissibility.
SCIENTIFIC REPORTS
(2023)
Article
Biotechnology & Applied Microbiology
Altynay Kaidarova, Nathan R. Geraldi, Rory P. Wilson, Juergen Kosel, Mark G. Meekan, Victor M. Eguiluz, Muhammad Mustafa Hussain, Atif Shamim, Hanguang Liao, Mani Srivastava, Swapnil Sayan Saha, Michael S. Strano, Xiangliang Zhang, Boon S. Ooi, Mark Holton, Lloyd W. Hopkins, Xiaojia Jin, Xun Gong, Flavio Quintana, Adylkhan Tovasarov, Assel Tasmagambetova, Carlos M. Duarte
Summary: Human societies rely on marine ecosystems, which are still experiencing degradation. This article discusses the adaptation of sensors and wearable technology developed for humans to improve marine monitoring. It highlights the barriers to transitioning this technology from land to sea, updates on sensor developments for ocean observation, and advocates for wider use of wearables on marine organisms. The authors propose that widespread use of wearables could contribute to an 'internet of marine life' and inform strategies for marine conservation and restoration.
NATURE BIOTECHNOLOGY
(2023)
Article
Physics, Fluids & Plasmas
Annalisa Caligiuri, Victor M. Eguiluz, Leonardo Di Gaetano, Tobias Galla, Lucas Lacasa
Summary: By interpreting a temporal network as a trajectory of a latent graph dynamical system, the concept of dynamical instability and a measure to estimate the network maximum Lyapunov exponent (nMLE) is introduced. Nonlinear time-series analysis algorithmic methods are extended to networks to quantify sensitive dependence on initial conditions and estimate the nMLE directly from a single network trajectory. The method is validated for synthetic generative network models displaying low- and high-dimensional chaos, and potential applications are discussed.
Article
Physics, Fluids & Plasmas
David Abella, Maxi San Miguel, Jose J. Ramasco
Summary: We investigated the non-Markovian effects of aging on binary-state dynamics in complex networks. Aging is defined as the tendency of agents to be less likely to change their state the longer they have been in the current state, resulting in heterogeneous activity patterns. We focused on the aging effects in the Threshold model, which is used to explain the adoption process of new technologies. Through analytical approximations and Monte Carlo simulations, we found that aging slows down the cascade dynamics towards the full-adoption state and alters the growth laws of adopters' density.
Article
Physics, Fluids & Plasmas
Lucia Ramirez, Maxi San Miguel, Tobias Galla
Summary: In this study, we investigate the time evolution of the density of active links and the entropy of the distribution of agents among opinions in multistate voter models on uncorrelated networks with all-to-all interaction. We find that the density of active links decays exponentially, while the average entropy decays exponentially only when there are at most two opinions left in the population.
Article
Physics, Multidisciplinary
Lucas Lacasa, Jorge P. Rodriguez, Victor M. Eguiluz
Summary: This study investigates the simulation of temporal networks, which model the evolution of interactions between elements in a complex system over time. It interprets temporal networks as trajectories of collective motion in graph space, following a latent graph dynamical system. The study proposes a way to measure how the network pulsates and collectively fluctuates over time and space, and demonstrates the measurement by constructing stochastic and deterministic graph dynamical systems.
PHYSICAL REVIEW RESEARCH
(2022)
