Article
Business
J. Manuel Sanchez-Cartas
Summary: This study proposes a theoretical economic model to explain the impact of free-to-play and pay-to-play video games on player welfare. In the long term, player welfare depends on the quality and network effects of the game, while in the short term, it is mainly influenced by the relationships among in-game items. Preliminary evidence suggests that the free-to-play model may reduce welfare.
TECHNOLOGICAL FORECASTING AND SOCIAL CHANGE
(2022)
Article
Ecology
Giulia Ghedini, Dustin J. Marshall, Michel Loreau
Summary: This study empirically assessed how species diversity affects biomass and energy fluxes in phytoplankton communities. Diverse communities produced net energy and biomass at faster rates, reaching greater maximum biomass but with no difference in maximum net energy production. Competition limits energy fluxes as biomass accumulates over time.
FUNCTIONAL ECOLOGY
(2022)
Article
Agronomy
Jihui Tian, Xing Lu, Qianqian Chen, Xizhi Kuang, Cuiyue Liang, Lansheng Deng, Dongjiao Lin, Kunzheng Cai, Jiang Tian
Summary: Little is known about the dynamics of P fractions and bacterial communities in the rhizosphere of legumes in karst soils. In this study, a field experiment was conducted to investigate P uptake, rhizosphere P fractions and bacterial community structure of soybean in response to P fertilization. Results showed that rhizosphere acidification during soybean cultivation led to changes in P fractions and bacterial community composition. Phosphorus fertilization further affected soil pH and different P fractions, leading to alterations in bacterial community composition, especially in soils without P input.
Article
Multidisciplinary Sciences
Ross Hollett, Sian Tomkinson, Sam Illingworth, Brad Power, Tauel Harper
Summary: This article examines players' experiences with finding new games and using the Australian National Classification Scheme. The findings suggest that players struggle with choosing games to purchase, and that existing classification systems are mostly beneficial for selecting games for minors.
Article
Ecology
Donald J. Benkendorf, Howard H. . Whiteman
Summary: The study found that speckled dace have similar functional roles regardless of their size, and their impact on the ecosystem is non-linear. Omnivores mainly exert their effects through benthic and pelagic pathways, increasing the abundance of emerging insects.
Article
Agriculture, Multidisciplinary
Ma Xin-ling, Liu Jia, Chen Xiao-fen, Li Wei-tao, Jiang Chun-yu, Wu Meng, Liu Ming, Li Zhong-pei
Summary: Parent materials and fertility levels of paddy soils in subtropical China exhibit high variability. Soil properties, particularly soil organic carbon, are key factors shaping bacterial community composition in paddy soils. Bacterial interactions tend towards cooperation leading to shifts in dominant bacterial species when the soil environment improves.
JOURNAL OF INTEGRATIVE AGRICULTURE
(2021)
Article
Communication
Nicholas David Bowman, John Velez, Tim Wulf, Johannes Breuer, Koji Yoshimura, Lindsey Jean Resignato
Summary: This study explores the impact of video game controllers on nostalgia by combining quantitative and qualitative methods. The results show that controller type has little relation to nostalgia, but in-game performance and overall gaming experience can influence nostalgia. Additionally, younger players without prior game experience are more likely to feel historical nostalgia.
PSYCHOLOGY OF POPULAR MEDIA
(2023)
Article
Education & Educational Research
Claudio Farias, Yessica Segovia, Carla Valerio, Isabel Mesquita
Summary: Although there was relatively equal participation among students in game-play activities during the two seasons, students' skill-level had a greater impact on their participation than their sex. Higher-skilled students had more total participation time in the second season (football) compared to lower-skilled students. There was a more balanced participation time between girls and boys in the activities, with boys showing higher participation in the competition context of football.
EUROPEAN PHYSICAL EDUCATION REVIEW
(2022)
Article
Multidisciplinary Sciences
Shota Shibasaki, Sara Mitri
Summary: This study investigates the factors influencing the stability of gut microbial communities through a mathematical model. The results suggest that communities assembled through species invasion are more stable, lower invasion frequency in the downstream patch enhances community stability, and upstream species with positive effects on downstream species can further increase stability.
Article
Biochemistry & Molecular Biology
MacLean G. Kohlmeier, Harry Yudistira, Amanat Ali, Ivan J. Oresnik
Summary: This study screened Bradyrhizobium japonicum and other Bradyrhizobia strains for bacteriocin-like activity and identified genes involved in bacteriocin production. A mutant strain with loss of inhibitory activity was obtained by gene mutagenesis. The mutant strain showed decreased competitiveness in nodule occupancy. The function of the gene bjfn1_01204 in inhibiting the tester strain remains unknown.
CANADIAN JOURNAL OF MICROBIOLOGY
(2022)
Article
Ecology
Samuel Dijoux, David S. Boukal
Summary: The study demonstrates that multichannel food webs are shaped by the productivity of mesohabitats and the body sizes of consumers. It merges previous theories and discovers new emergent Allee effects, providing theoretical support for the observed stability of food webs.
Review
Endocrinology & Metabolism
Wout Bittremieux, Mingxun Wang, Pieter C. Dorrestein
Summary: This review examines the current state of spectral libraries for untargeted LC-MS/MS based metabolomics. It shows that the number of entries in publicly accessible spectral libraries has increased over 60-fold in the past eight years to aid molecular interpretation, and discusses how the role of spectral libraries in untargeted metabolomics will evolve in the near future.
Article
Ecology
Wojciech Uszko, Magnus Huss, Anna Gardmark
Summary: Global warming can change the size distributions of animal communities, but the contribution of size shifts within species versus between species to these changes is not clear. This study found that warming shifted community size structure towards dominance of smaller species, but this result was dependent on a size-temperature interaction favoring smaller individuals in warm environments. However, the same mechanism caused a shift towards dominance of larger stages within species, reconciling disparate observations of size responses within and across zooplankton species in the literature.
Article
Ecology
Avery L. Russell, Stephanie R. Sanders, Liam A. Wilson, Daniel R. Papaj
Summary: In mutualisms involving plant-pollinator interactions, plants may cheat on pollen rewards to maximize their own benefit; however, a study showed that variation in flower size did not significantly affect bees' ability to learn to distinguish between models and mimics in intersexual floral mimicry systems.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2021)
Article
Plant Sciences
Nicole L. Kinlock
Summary: Analyzing plant interactions using network theory and considering interactions at different life stages can provide a more comprehensive understanding of species coexistence in plant communities. The study highlights the importance of examining network architecture and substructures in promoting species coexistence, which may not be evident when considering pairwise interactions or interactions within a single life stage.
JOURNAL OF ECOLOGY
(2021)
Article
Chemistry, Applied
Alfredo Calderon-Cardenas, Fabian W. Hartl, Jason A. C. Gallas, Hamilton Varela
Summary: This study presents a renewed electrochemical model for the oscillatory electro-oxidation of formic acid on platinum in acidic medium, evaluating three reaction pathways towards the production of CO2. The proposed mechanism is translated into a kinetic model, and numerical simulations under voltammetric and oscillatory regimes suggest a good approximation to the actual mechanism. Discussions on the role of electrochemical oscillations in mechanistic studies and comparisons with previous models are provided, along with some perspectives for future research.
Article
Physics, Multidisciplinary
Jason A. C. Gallas
Summary: The study reports the distribution of spikes in periodic oscillations in an optically injected laser diode proxy as a function of injected field strength and detuning. An unexpected feature of overlapping adding-doubling complexification cascades is found. The two-parameter spikes complexification cascades of the laser proxy mimic phenomena in a state-of-the-art semiconductor laser model and should be easy to observe experimentally in lasers or other complex oscillators.
BRAZILIAN JOURNAL OF PHYSICS
(2021)
Article
Mathematics, Applied
Richard J. Field, Joana G. Freire, Jason A. C. Gallas
Summary: This study reports the discovery of a regular lattice of exceptional quint points in the frequency-amplitude control parameter space of a periodically driven oscillator, in a photochemically periodically perturbed ruthenium-catalyzed Belousov-Zhabotinsky reaction model. These quint points are singular boundary points where five distinct stable oscillatory phases coalesce, with spikes of the inhibitor showing intricate but regular branching into stable phases with fivefold contact points. These findings revise current knowledge about the topology of the control parameter space of an oscillating chemical reaction.
Article
Mathematics, Applied
Gonzalo Marcelo Ramirez-Avila, Juergen Kurths, Jason A. C. Gallas
Summary: Stability rings are closed parameter paths in the control space of a vertical-cavity surface-emitting semiconductor laser where laser stability can be maintained even in the presence of small parameter fluctuations. Research suggests that such stability-enhancing rings are common structures present in the control parameter space of many complex systems.
Article
Physics, Multidisciplinary
Gonzalo Marcelo Ramirez-Avila, Stephanie Depickere, Imre M. Janosi, Jason A. C. Gallas
Summary: In this study, a detailed investigation of the dynamical response of the Rulkov model over a wide range of parameters is conducted. The study reveals the existence of nested arithmetic progressions among periodic pulsing and bursting phases of the model. These findings contribute significantly to the understanding of the dynamics of the Rulkov model and can be potentially valuable in large-scale simulations of the brain and other complex neuron networks.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Physics, Condensed Matter
Jason A. C. Gallas
Summary: We have discovered a non-quantum chirality in the periodically driven Brusselator, which is different from the standard chirality in quantum contexts. This new type of chirality is governed solely by classical rate equations. By computing high-resolution phase diagrams, we have determined the number of spikes, local maxima, in the stable periodic oscillations of the Brusselator as a function of the frequency and amplitude of the external drive. We also discuss how to experimentally observe non-quantum chirality in oscillators governed by nonlinear rate equations.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Physics, Multidisciplinary
Christos K. Volos, Jason A. C. Gallas
Summary: Recent research has discovered special phenomena, such as quint points, parameter rings, and non-quantum chirality, in the stability diagrams of classical oscillators. In this study, we experimentally detected five phases of oscillation spread around a quint point using a simple electronic circuit. This finding supports the predictions of non-quantum chirality in the control parameter space of nonlinear oscillators.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Multidisciplinary
Jason A. C. Gallas
Summary: This paper reports the observation of chirality in a classical scenario, where stable oscillations generate intricate structures with reflected symmetry on a mirror. These chiral pairs connecting families of oscillations in closed loops are expected to be easily detectable experimentally and are speculated to be a generic property of nonlinear oscillators governed by classical equations.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Mathematics, Applied
Jason A. C. Gallas, Lars F. Olsen
Summary: By studying simplified subnetworks derived from the complete model, many important features of the complex model can be understood, including period-doubling and period-adding scenarios. The return maps of the subnetwork models are similar to those of the experimental system. Two of the subnetwork models exhibit quint points.
Article
Geochemistry & Geophysics
Ana P. O. Muller, Clecio R. Bom, Jesse C. Costa, Matheus Klatt, Elisangela L. Faria, Bruno dos Santos Silva, Marcelo P. de Albuquerque, Marcio P. de Albuquerque
Summary: The accurate and fast estimation of velocity models in seismic imaging is crucial. This paper proposes a new flow called "Deep-Tomography" that uses deep learning algorithms to iteratively predict velocity models, improving the accuracy and efficiency compared to conventional methods. Experimental results show that the models estimated by Deep-Tomography can significantly improve the final results obtained with full-waveform inversion.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Ana Paula O. Muller, Jesse C. Costa, Clecio R. Bom, Elisangela L. Faria, Matheus Klatt, Gabriel Teixeira, Marcelo P. de Albuquerque, Marcio P. de Albuquerque
Summary: This study develops the use of migrated images from an inaccurate velocity model to predict the shape of salt inclusions using a convolutional neural network. The trained U-Net accurately predicts salt inclusions masks and performs well on synthetic and previously unseen benchmark datasets.
Article
Geochemistry & Geophysics
Matheus Klatt, Elisangela L. Faria, Ana Paula O. Muller, Juliana M. Coelho, Jorge L. Gonzalez, Marcelo P. de Albuquerque, Marcio P. de Albuquerque, Clecio R. Bom, Maury Duarte Correia
Summary: This study investigates the use of deep learning for velocity model building. By training a convolutional neural network, it accurately defines salt geometries and improves the resolution of velocity model structures through deeper encoder-decoder models with shortcut connections. The use of a composite loss function also helps better delineate areas with high-velocity contrast. The approach can be extended to other deep learning methods for velocity model building.
Article
Geochemistry & Geophysics
Ana P. O. Muller, Jesse C. Costa, Clecio R. Bom, Matheus Klatt, Elisangela L. Faria, Marcelo P. de Albuquerque, Marcio P. de Albuquerque
Summary: Full-waveform inversion (FWI) is the current standard method for determining seismic imaging model parameters, but it often suffers from an ill-posed problem and local minima. Recent works have proposed integrating FWI with Convolutional Neural Networks (CNN) to create a Physics-Informed Neural Network (PINN). This integration has the advantage of stabilizing the inversion, avoiding local minima, and requiring minimal prior information. In this study, a combination of supervised learning and physics-informed transfer learning is proposed to improve the accuracy and efficiency of the FWI process. The results demonstrate the effectiveness and robustness of the proposed method.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Meteorology & Atmospheric Sciences
Imre M. Janosi, Amin Padash, Jason A. C. Gallas, Holger Kantz
Summary: This study investigates the advection of passive tracers in the tropical Pacific region using numerical experiments. The results show significant inter- and intra-annual variations in the strength of advection, and reveal a significant anticorrelation between advection intensity and the Oceanic Nino Index (ONI) and a weaker positive correlation with the Southern Oscillation Index (SOI). The statistical properties of the tracers' trajectories suggest that they can be modeled as a 1D fractional Brownian motion process.
Article
Chemistry, Physical
Jason A. C. Gallas
Summary: The article discusses the discovery of chirality in numerically computed stability diagrams of a chemical reaction, specifically in a photochemically periodically perturbed ruthenium-catalyzed Belousov-Zhabotinsky reaction model governed by purely classical equations. This novel chirality presents opportunities to explore previously unsuspected properties of purely classical chemical oscillators.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
