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Precipitation of cold gas due to thermal instability in both galaxy clusters and the circumgalactic medium may regulate AGN feedback. We investigate thermal instability in idealized simulations of the circumgalactic medium with a parameter…

Astrophysics of Galaxies · Physics 2024-10-08 Benjamin D. Wibking , G. Mark Voit , Brian W. O'Shea

We present an experimental realization of the collective trapping phase transition [Kaiser et al., PRL 108, 268307 (2012)], using motile polar granular rods in the presence of a V-shaped obstacle. We offer a theory of this transition based…

Soft Condensed Matter · Physics 2019-03-22 Nitin Kumar , Rahul Kumar Gupta , Harsh Soni , Sriram Ramaswamy , A. K. Sood

A density matrix based analytical model is developed to study the coherent probe field propagation through a four-level V type system in presence of a coherent control field. The model allows coupling of the probe field from the upper…

Poleward water vapor transport in the midlatitudes mainly occurs in meandering filaments of intense water vapor transport, spanning thousands of kilometers long and hundreds of kilometers wide and drifting eastward. The water vapor…

Atmospheric and Oceanic Physics · Physics 2024-04-02 Hing Ong , Da Yang

Self-organizing system is studied whose behavior is governed by field of an order parameter, a fluctuation amplitude of conjugate field and a couple of Grassmannian conjugated fields that define the entropy as a control parameter. Within…

Statistical Mechanics · Physics 2007-05-23 Alexander I. Olemskoi , Alexei V. Khomenko

The present work investigates the effect of inertia on the entropy production rate $\Pi$ for all canonical models of active particles for different dimensions and the type of confinement. To calculate $\Pi$, the link between the entropy…

Statistical Mechanics · Physics 2023-02-01 Derek Frydel

A deeper understanding of the drivers of evapotranspiration and the modelling of its constituent parts (evaporation and transpiration) could be of significant importance to the monitoring and management of water resources globally over the…

Machine Learning · Computer Science 2022-05-02 Adam Stapleton , Elke Eichelmann , Mark Roantree

Urban air mobility is an innovative mode of transportation in which electric vertical takeoff and landing (eVTOL) vehicles operate between nodes called vertiports. We outline a self-organized vertiport arrival system based on deep…

Machine Learning · Computer Science 2024-08-09 Martin Waltz , Ostap Okhrin , Michael Schultz

Dynamic soaring is a flying technique to exploit the energy available in wind shear layers, enabling potentially unlimited flight without the need for internal energy sources. We propose a framework for autonomous dynamic soaring with a…

The role of coherent airflow structures capable of setting gravel-size particles in motion is studied theoretically and experimentally. Specifically, a micromechanical model based on energy conservation is proposed to describe the incipient…

Fluid Dynamics · Physics 2024-06-04 Xiao-Hu Zhao , Manousos Valyrakis , Thomas Pähtz , Zhen-Shan Li

Humans have recorded the arrival dates of migratory birds for millennia, searching for trends and patterns. As the first arrival among individuals in a species is the realized tail of the probability distribution of arrivals, the…

Applications · Statistics 2023-06-13 Dhanushi A. Wijeyakulasuriya , Ephraim M. Hanks , Benjamin A. Shaby

Flapping animal flight is often modeled as a combined pitching and heaving motion in order to investigate the unsteady flow structures and resulting forces that could augment the animal's lift and propulsive capabilities. This work isolates…

Fluid Dynamics · Physics 2017-10-12 Jennifer A. Franck , Kenneth Breuer

The recent detections of microquasars at energies above a few hundred keV up to the TeV in one case has stimulated a strong interest and raised several questions. How are the MeV, GeV, and even TeV emissions, produced? What are the emission…

High Energy Astrophysical Phenomena · Physics 2017-02-07 Jérôme Rodriguez

Fast data generation based on Machine Learning has become a major research topic in particle physics. This is mainly because the Monte Carlo simulation approach is computationally challenging for future colliders, which will have a…

High Energy Physics - Experiment · Physics 2022-11-30 Benno Käch , Dirk Krücker , Isabell Melzer-Pellmann , Moritz Scham , Simon Schnake , Alexi Verney-Provatas

Energy management is a critical aspect of risk assessment for Uncrewed Aerial Vehicle (UAV) flights, as a depleted battery during a flight brings almost guaranteed vehicle damage and a high risk of human injuries or property damage.…

Machine Learning · Computer Science 2021-11-02 Arnav Choudhry , Brady Moon , Jay Patrikar , Constantine Samaras , Sebastian Scherer

Understanding heating processes in galaxy clusters is essential for predicting the regulation of radiative cooling and star formation, and for clarifying the mechanisms underlying active galactic nucleus (AGN) feedback in cool-core…

High Energy Astrophysical Phenomena · Physics 2026-03-31 Moun Meenakshi , Rainer Weinberger , Christoph Pfrommer , Thomas Berlok

We observe the spontaneous evaporation of atoms confined in a bubble-like rf-dressed trap (Zobay and Garraway, 2001). The atoms are confined in a quadrupole magnetic trap and are dressed by a linearly polarized rf field. The evaporation is…

We present a Stackelberg game model to investigate how individuals make their decisions on timing and route selection. Group formation can naturally result from these decisions, but only when individuals arrive at the same time and choose…

Computer Science and Game Theory · Computer Science 2025-08-26 Chenlan Wang , Mingyan Liu

We investigate the occupancy statistics of birds on a wire and on higher-dimensional substrates. In one dimension, birds land one by one on a wire and rest where they land. Whenever a newly arriving bird lands within a fixed distance of…

Statistical Mechanics · Physics 2025-01-14 P. L. Krapivsky , S. Redner

The authors investigate the ideal, nondriven multifluid equations of motion to identify consistent (i.e., truly stationary), mechanically static models for composition profiles within the thermosphere. These physically faithful functions…

Space Physics · Physics 2016-07-13 J. M. Picone , J. T. Emmert , D. P. Drob
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