Results 21 to 30 of about 12,853 (286)

Frequency Analysis of Functionally Graded Carbon Nanotube-reinforced Cylindrical Panels by Mesh-free Galerkin Method [PDF]

open access: yesMechanics of Advanced Composite Structures, 2021
In this work, the three-dimensional mesh-free (3D-Mfree) method is used for free vibration analysis of functionally graded (FG) cylindrical panels reinforced by carbon nanotubes.
Jaber Alihemmati   +3 more
doaj   +1 more source

Value of species and the evolution of conservation ethics [PDF]

open access: yesRoyal Society Open Science, 2018
The theory of evolution by natural selection can help explain why people care about other species. Building upon recent insights that morality evolves to secure fitness advantages of cooperation, we propose that conservation ethics (moral beliefs ...
Darragh Hare   +2 more
doaj   +1 more source

Vibration Analysis of Different Types of Porous FG Conical Sandwich Shells in Various Thermal Surroundings [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2020
Vibration behavior of different types of porous functionally graded (FG) conical sandwich shells are investigated based on a modified high order sandwich shells theory for the first time. Sandwich shell includes FG face sheets covering a homogeneous core
Mohsen Rahmani   +3 more
doaj   +1 more source

Limits of Hamilton's rule [PDF]

open access: yesJournal of Evolutionary Biology, 2006
The evolution of cooperation is a fundamental problem in evolutionary biology. Over the last decades a wealth of models and mechanisms have been proposed for explaining how cooperators can thrive under Darwinian selection. At the same time, discussions of the conceptual connections between the different approaches have often been neglected.
M, Doebeli, C, Hauert
openaire   +2 more sources

The inclusive fitness controversy: finding a way forward [PDF]

open access: yesRoyal Society Open Science, 2017
This paper attempts to reconcile critics and defenders of inclusive fitness by constructing a synthesis that does justice to the insights of both. I argue that criticisms of the regression-based version of Hamilton's rule, although they undermine its use
Jonathan Birch
doaj   +1 more source

Genetic Relatedness, Emotional Closeness and Physical Aggression: A Comparison of Full and Half Sibling Experiences

open access: yesEurope's Journal of Psychology, 2020
Two studies investigated whether perceived closeness of siblings, and aggression between siblings, were associated with genetic relatedness. In following Hamilton’s rule, we predicted that as the coefficient of relatedness between siblings increased ...
Roxanne Khan, Gayle Brewer, John Archer
doaj   +1 more source

Hamilton's rule, inclusive fitness maximization, and the goal of individual behaviour in symmetric two-player games [PDF]

open access: yes, 2016
Hamilton's original work on inclusive fitness theory assumed additivity of costs and benefits. Recently, it has been argued that an exact version of Hamilton's rule for the spread of a pro-social allele (rb > c) holds under nonadditive pay-offs, so ...
Martens, Johannes, Okasha, Samir
core   +1 more source

Quasi-3D Hyperbolic Shear Deformation Theory for the Free Vibration Study of Honeycomb Microplates with Graphene Nanoplatelets-Reinforced Epoxy Skins

open access: yesMolecules, 2020
A novel quasi-3D hyperbolic shear deformation theory (QHSDT) with five unknowns is here employed, together with the Hamilton’s principle and the modified couple stress theory (MCST) to analyze the vibrational behavior of rectangular micro-scale sandwich ...
Hossein Arshid   +4 more
doaj   +1 more source

Generalisations of Hamilton's Rule Applied to Non-Additive Public Goods Games with Random Group Size

open access: yesFrontiers in Ecology and Evolution, 2014
Inclusive fitness theory has been described as being limited to certain special cases of social evolution. In particular some authors argue that the theory can only be applied to social interactions having additive fitness effects, and involving only ...
James A R Marshall
doaj   +1 more source

Evolutionary Influences on Assistance to Kin: Evidence from the Panel Study of Income Dynamics

open access: yesSociological Science, 2023
Amid the changes that have diversified family life, studies have shown the continuing importance of attachment to kin through established patterns such as ties among full siblings and newer patterns such as efforts by donor-conceived individuals to find ...
Andrew J. Cherlin
doaj   +1 more source

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