Results 91 to 100 of about 338,003 (249)
Wormhole Geometries In $f(R,T)$ Gravity
, 2014 We study wormhole solutions in the framework of f (R,T) gravity where R is the scalar curvature, and T is the trace of the stress-energy tensor of the matter.
A. DeBenedictis +45 more
core +1 more source
Advanced Materials, EarlyView.Stacked nanoflake assembly (SNA) membranes can oscillate autonomously, offering opportunities for soft actuation and energy harvesting. This work uncovers the physical mechanism behind the sustained oscillation of SNA membranes in gradient humidity and identifies three governing dimensionless parameters, enabling rational design for optimizing SNA ...
Zijing Zhang +5 more
wiley +1 more source
Cosmological viability conditions for $f(T)$ dark energy models
, 2012 Recently $f(T)$ modified teleparallel gravity where T is the torsion scalar has been proposed as the natural gravitational alternative for dark energy.
Mohammadipour, N., Setare, M. R.
core +1 more source
A Comparative Study on Early‐Stage Icing Evaluation Techniques for Passive Ice Protection Systems
Advanced Materials Interfaces, EarlyView.This study addresses the lack of standardized methodologies for evaluating the early‐stage icing performance of passive ice protection systems. A unified experimental protocol is proposed and applied to representative hydrophilic and hydrophobic surfaces under controlled conditions.
Lorenzo Facco +4 more
wiley +1 more source
Energy Conditions in Higher Derivative $f(R,\Box R,T)$ Gravity
, 2018 In this paper, we examined the viability bounds of a higher derivative $f(R,\Box R, T)$ theory through analyzing energy conditions (where $R$ and $T$ are the Ricci scalar and trace of energy momentum tensor, respectively). We take flat Friedmann-Lema\^{i}
Bhatti, M. Z. +3 more
core +1 more source
Bistable Wetting States on a Smooth Surface
Advanced Materials Interfaces, EarlyView.Droplets on non‐textured surfaces typically exhibit a monostable wetting state. Here, we show that droplets can exhibit bistability even without surface texture. We investigate water droplets on a smooth substrate immersed in oil. We find that molecular modulation causes the droplet states to bifurcate into either a sticking or a repellent state ...
Mizuki Tenjimbayashi, Shunto Arai
wiley +1 more source
Nuclear Physics BGeneral Relativity (GR) has been the cornerstone of gravitational physics for over a century, yet challenges like dark energy, dark matter, and quantum gravity inconsistencies motivate modified gravity theories.
M. Ilyas, Z. Yousaf, M.Z. Bhatti
doaj +1 more source
, 2014 A modified Mimetic gravity (MMG) is proposed as a generalization of general relativity. The model contain a physical metric which is function of an auxiliary (unphysical) metric and a Lyra's metric.
Altaibayeva, Aziza +2 more
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Topological Point Defects in SmC* Liquid Crystals Under Mechanical Disturbance
Advanced Materials Interfaces, EarlyView.Tangetial air jet shear inducess island formation and nucleates topological point defects in uniform SmC films. Island bounded by edge dislocation loops shrink and transform into isolated point defects under continued shear. Mechanical perturbatio provides a controllable route for defect engineering in smectric liquid crystal thin films.
Gunganist Kongklad +3 more
wiley +1 more source
Advanced Materials Technologies, EarlyView.This study formulated a 5Y‐PSZ zirconia paste for extrusion‐based additive manufacturing via direct ink writing, producing dense ceramic structures for dental applications. A colloidal approach with 47 vol% nanometric powder and tailored additives optimized rheology and printability.
Juliana de Freitas Gouveia Silva +5 more
wiley +1 more source