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In densely-packed two-dimensional systems of growing cells, such as rod-shaped bacteria, a number of experimental and numerical studies report distinct patterns of nematic orientational order in the presence of confinement. So far, these…

软凝聚态物质 · 物理学 2025-06-13 Lukas Hupe , Jonas Isensee , Ramin Golestanian , Philip Bittihn

It is argued that in the case of a smooth transition across a (dilaton-driven) curvature bounce the growing mode of the vector fluctuations matches continuously with a decaying mode at later times. Analytical examples of this observation…

高能物理 - 理论 · 物理学 2009-11-10 Massimo Giovannini

We are living in an uncertain and dynamically changing world, where optimal decision-making under uncertainty is directly linked to the survival of species. However, evolutionary selection pressures that shape value-based decision-making…

种群与进化 · 定量生物学 2018-04-04 Erdem Pulcu

Photovoltaic (PV) power production increased drastically in Europe throughout the last years. About the 6% of electricity in Italy comes from PV and for an efficient management of the power grid an accurate and reliable forecasting of…

机器学习 · 计算机科学 2014-09-30 Matteo De Felice , Marcello Petitta , Paolo M. Ruti

Wind speed and direction variations across the rotor affect power production. As utility-scale turbines extend higher into the atmospheric boundary layer (ABL) with larger rotor diameters and hub heights, they increasingly encounter more…

Microbial populations generally evolve in volatile environments, under conditions fluctuating between harsh and mild, e.g. as the result of sudden changes in toxin concentration or nutrient abundance. Environmental variability thus shapes…

种群与进化 · 定量生物学 2023-12-07 Matthew Asker , Lluís Hernández-Navarro , Alastair M. Rucklidge , Mauro Mobilia

We study the dynamics of the voter and Moran processes running on top of complex network substrates where each edge has a weight depending on the degree of the nodes it connects. For each elementary dynamical step the first node is chosen…

统计力学 · 物理学 2011-06-30 Andrea Baronchelli , Claudio Castellano , Romualdo Pastor-Satorras

For various species of biological cells, experimental observations indicate the existence of universal distributions of the cellular size, scaling relations between the cell-size moments and simple rules for the cell-size control. We…

软凝聚态物质 · 物理学 2017-01-12 David A. Kessler , Stanislav Burov

Many studies have analyzed how variability in reproductive success affects fitness. However, each study tends to focus on a particular problem, leaving unclear the overall structure of variability in populations. This fractured conceptual…

种群与进化 · 定量生物学 2011-11-08 Steven A. Frank

We study optimal two-sector (vegetative and reproductive) allocation models of annual plants in temporally variable environments, that incorporate effects of density dependent lifetime variability and juvenile mortality in a fitness…

种群与进化 · 定量生物学 2022-06-24 Sergiy Koshkin , Zachary Zalles , Michael F. Tobin , Nicolas Toumbacaris , Cameron Spiess

Plants are sensitive to thermal and electrical effects; yet the coupling of both, known as thermoelectricity, and its quantitative measurement in vegetal systems never were reported. We recorded the thermoelectric response of bean sprouts…

生物物理 · 物理学 2015-02-17 C. Goupil , H. Ouerdane , A. Khamsing , Y. Apertet , F. Bouteau , S. Mancuso , R. Patino , Ph. Lecoeur

A model of multicellular systems with several types of cells is developed from the phase field model. The model is presented as a set of partial differential equations of the field variables, each of which expresses the shape of one cell.…

生物物理 · 物理学 2015-05-30 Makiko Nonomura

We study the influence of the seed in random trees grown according to the uniform attachment model, also known as uniform random recursive trees. We show that different seeds lead to different distributions of limiting trees from a total…

概率论 · 数学 2014-10-22 Sébastien Bubeck , Ronen Eldan , Elchanan Mossel , Miklós Z. Rácz

Cell type (e.g. pluripotent cell, fibroblast) is the end result of many complex processes that unfold due to evolutionary, developmental, and transformational stimuli. A cell's phenotype and the discrete, a priori states that define various…

定量方法 · 定量生物学 2013-02-05 Bradly Alicea

Here we study how mutations which change physical properties of cell proteins (stability) impact population survival and growth. In our model the genotype is presented as a set of N numbers, folding free energies of cells N proteins.…

生物大分子 · 定量生物学 2009-03-10 Peiqiu Chen , Eugene I. Shakhnovich

It is established that the mechanical properties of hydrogels control the fate of (stem) cells. However, despite its importance, a one-to-one correspondence between gels' stiffness and cell behaviour is still missing from literature. In…

This paper reviews methods that are used for adequacy risk assessment considering solar power and for assessment of the capacity value of solar power. The properties of solar power are described as seen from the perspective of the…

The phase variation with angle of hadronic amplitudes is studied with a view to understanding the underlying physical quantities which control it and how well it can be determined in free space. We find that unitarity forces a moderately…

核理论 · 物理学 2008-11-26 J. P. Dedonder , W. R. Gibbs , Mutazz Nuseirat

We use a variational approach to gain insight into the strongly correlated d-wave superconducting state of the high Tc cuprates at T=0. We show that strong correlations lead to qualitatively different trends in pairing and phase coherence:…

超导电性 · 物理学 2009-11-10 Arun Paramekanti , Mohit Randeria , Nandini Trivedi

Agrivoltaic systems represent a key technology for reaching sustainable development goals reducing the completion of land for food versus land for energy. Moreover, agrivoltaic systems are at the centre of the nexus between electricity…

系统与控制 · 电气工程与系统科学 2021-04-07 Pietro Elia Campana , Bengt Stridh , Stefano Amaducci , Michele Colauzzi