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In the growth of bacterial colonies, a great variety of complex patterns are observed in experiments, depending on external conditions and the bacterial species. Typically, existing models employ systems of reaction-diffusion equations or…

生物物理 · 物理学 2019-11-12 Lautaro Vassallo , David Hansmann , Lidia A. Braunstein

The stellar initial mass function (IMF) of early-type galaxies is the combination of the IMF of the stellar population formed in-situ and that of accreted stellar populations. Using as an observable the effective IMF $\alpha_{IMF}$, defined…

星系天体物理 · 物理学 2017-01-18 Alessandro Sonnenfeld , Carlo Nipoti , Tommaso Treu

The evolution of binaries consisting of evolved main sequence stars (1 < M_d/Msun < 3.5) with white dwarf companions (0.7 < M_wd/Msun < 1.2) is investigated through the thermal mass transfer phase. Taking into account the stabilizing effect…

天体物理学 · 物理学 2016-08-30 Natalia Ivanova , Ronald E. Taam

Homicide investigations often depend on the determination of a minimum post-mortem interval (PMI$_{min}$) by forensic entomologists. The age of the most developed insect larvae (mostly blow fly larvae) gives reasonably reliable information…

其他定量生物学 · 定量生物学 2010-03-31 S. Reibe , Ph. von Doetinchem , B. Madea

High-dimensional and sparse (HiDS) matrices are omnipresent in a variety of big data-related applications. Latent factor analysis (LFA) is a typical representation learning method that extracts useful yet latent knowledge from HiDS matrices…

机器学习 · 计算机科学 2022-04-19 Di Wu , Peng Zhang , Yi He , Xin Luo

Numerical modeling of the migration of three-phase immiscible fluid flow in variably saturated zones is challenging due to the different behavior of the system between unsaturated and saturated zones. This behavior results in the use of…

流体动力学 · 物理学 2022-04-27 Alessandra Feo , Fulvio Celico

Resistance to insecticide is considered nowadays one of the major threats to insect control, as its occurrence reduces drastically the efficiency of chemical control campaigns, and may also perturb the application of other control methods,…

最优化与控制 · 数学 2019-12-24 Pastor E. Pérez-Estigarribia , Pierre-Alexandre Bliman , Christian Schaerer

Arguably, the best method for determining the effective temperature ($T_{\mathrm{eff}}$) and surface gravity (log $g$) of a DA white dwarf is by fitting the Hydrogen Lyman and Balmer absorption features. However, as has been shown for white…

太阳与恒星天体物理 · 物理学 2014-10-06 S. P. Preval , M. A. Barstow , N. R. Badnell , J. B. Holberg , I. Hubeny

We examine the emergent fluxes from helium-core white dwarfs following their evolution from the end of pre-white dwarf stages down to advanced cooling stages. For this purpose, we include a detailed treatment of the physics of the…

天体物理学 · 物理学 2009-11-07 R. D. Rohrmann , A. M. Serenelli , L. G. Althaus , O. G. Benvenuto

This is the first paper of a series aiming at investigating galaxy formation and evolution in the giant-void class of the Lemaitre-Tolman-Bondi (LTB) models that best fits current cosmological observations. Here we investigate the…

宇宙学与河外天体物理 · 物理学 2013-10-18 A. Iribarrem , P. Andreani , C. Gruppioni , S. February , M. B. Ribeiro , S. Berta , E. Le Floc'h , B. Magnelli , R. Nordon , P. Popesso , F. Pozzi , L. Riguccini

The wing structure of several insects, including dragonflies, is not smooth, but corrugated; its vertical cross-section consists of a connected series of line segments. Some previous studies have reported that corrugated wings exhibit…

流体动力学 · 物理学 2023-04-28 Yusuke Fujita , Makoto Iima

Step selection functions (SSFs) are flexible models to jointly describe animals' movement and habitat preferences. Their popularity has grown rapidly and extensions have been developed to increase their utility, including various…

定量方法 · 定量生物学 2023-08-31 Théo Michelot , Natasha J. Klappstein , Jonathan R. Potts , John Fieberg

White dwarf cooling sequences provides a useful indicator of the evolutionary time scales involved in the chronometry and star formation history of the galactic disk and, for this reason, the luminosity function of white dwarfs has become a…

天体物理学 · 物理学 2007-05-23 Rene A. Mendez , Maria T. Ruiz

First, we briefly describe the general growth mechanism, which governs the growth of living organisms, and its mathematical representation, the growth equation. Using the growth equation, we compute growth curve for S. cerevisiae and show…

其他定量生物学 · 定量生物学 2013-02-19 Yuri K. Shestopaloff

Sub-seasonal climate forecasting (SSF) is the prediction of key climate variables such as temperature and precipitation on the 2-week to 2-month time horizon. Skillful SSF would have substantial societal value in areas such as agricultural…

大气与海洋物理 · 物理学 2021-10-12 Sijie He , Xinyan Li , Laurie Trenary , Benjamin A Cash , Timothy DelSole , Arindam Banerjee

Thermal fluid processes are inherently multi-physics and multi-scale, involving mass-momentum-energy transport phenomena. Thermal fluid simulation (TFS) is based on solving conservative equations, for which - except for "first-principle"…

流体动力学 · 物理学 2018-11-07 Chih-Wei Chang , Nam T. Dinh

We examine the status of various dark energy-models in light of the recently observed SN 1997ff at z \approx 1.7. The modified data still fit a pure cosmological constant \Lambda or a quintessence with an equation of state similar to that…

天体物理学 · 物理学 2009-11-07 R. G. Vishwakarma

We have been using Keck laser guide star adaptive optics to monitor the orbits of ultracool binaries, providing dynamical masses at lower luminosities and temperatures than previously available and enabling strong tests of theoretical…

太阳与恒星天体物理 · 物理学 2009-12-07 Trent J. Dupuy , Michael C. Liu , Michael J. Ireland

White dwarf evolution is essentially a gravothermal cooling process, which,for cool white dwarfs, sensitively depends on the treatment of the outer boundary conditions. We provide detailed outer boundary conditions appropriate for computing…

太阳与恒星天体物理 · 物理学 2015-06-11 R. D. Rohrmann , L. G. Althaus , E. García-Berro , A. H. Córsico , M. M. Miller Bertolami

Reliable star formation rate (SFR) measurements are essential for understanding early galaxy evolution, yet derived values rely on several assumptions. To address this problem, we investigate the SFRs of 12 massive ($9~<~\log(M_{\star}/{\rm…