Results 41 to 50 of about 12,930 (292)

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

Vibration of 2D FG Higher Order Plates using Differential Integral Quadrature Method [PDF]

open access: yesJournal of the Egyptian Society of Tribology, 2022
This article presented a mathematical model to investigate the free vibration behavior of bi-directional (2D) functionally graded plate (FGP) using higher order shear deformation theory.
E. Assie Amr, Mohamed Salwa
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

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

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

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

Free Vibration Analysis of FG Porous Sandwich Plates under ‎Various Boundary Conditions [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2021
In the present work, free vibration analysis of the square sandwich plate with functionally graded (FG) porous face sheets and isotropic homogenous core is performed under various boundary conditions.
Lazreg Hadji, Mehmet Avcar
doaj   +1 more source

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