Results 51 to 60 of about 22,331 (301)
Advanced Functional Materials, EarlyView.A swelling‐programmed micropatterned hydrogel guides adherent cells through a controlled transition from cell–matrix anchoring to cadherin‐mediated cell–cell compaction, enabling rapid assembly of high‐viability spheroids with defined size and morphology.
Han Gyeol Nam +8 more
wiley +1 more source
Transit cosmological models in $$F(R,{\bar{T}})$$ F ( R , T ¯ ) gravity theory
European Physical Journal C: Particles and FieldsIn the present paper, we investigate some exact cosmological models in $$F(R,{\bar{T}})$$ F ( R , T ¯ ) gravity theory. We have considered the arbitrary function $$F(R, {\bar{T}})=R+\lambda {\bar{T}}$$ F ( R , T ¯ ) = R + λ T ¯ where $$\lambda $$ λ is an
Dinesh Chandra Maurya, Ratbay Myrzakulov
doaj +1 more source
f(R) and f(T) theories of modified gravity [PDF]
AIP Conference Proceedings, 2012 We briefly review f(R) theories, both in the metric and Palatini formulations, their scalar-tensor representations and the chameleon mechanism that could explain the absence of perceptible consequences in the Solar System. We also review f(T) theories, a different approach to modified gravity consisting in a deformation of the teleparallel equivalent ...
openaire +2 more sources
f(R) gravity theory and CMBR constraints [PDF]
Physics Letters B, 2001 We consider the large-scale cosmic structure generation by an inflation based on a pure f(R)-type gravity theory. Comparison with recent CMBR observations gives the following results: (1) The near Zel'dovich spectral conditions uniquely choose R^2-type gravity. (2) The R^2 gravity predicts specific nearly scale-invariant Zel'dovich spectra for both the
Hwang, J., Noh, H.
openaire +2 more sources
Advanced Functional Materials, EarlyView.We introduce a capillary‐filtering‐based particle‐filling (CFPF) process that simultaneously forms vertical thermal pathways and electrical vias within µ‐pores. In situ microfluidic analysis reveals that capillary‐driven velocity gradients generate vorticity that governs µ‐platelet rotation and vertical alignment.
Yujin Mun +11 more
wiley +1 more source
Ghost-free non-local F(R) gravity compatible with ACT
Physics Letters BWe confront the ghost-free non-local F(R) gravity theories with the latest Atacama Cosmology Telescope (ACT) constraints on the spectral index of the scalar perturbations and the updated constraints of Planck/BICEP on the tensor-to-scalar ratio.
Shin’ichi Nojiri +2 more
doaj +1 more source
Inflation in $f(R,ϕ)$-theories and mimetic gravity scenario
European Physical Journal C, 2015 Minor edits and additional ...
Myrzakulov, Ratbay +2 more
openaire +3 more sources
, 2020 We provide a compact review on recent developments on axion F(R) gravity. The axion field is a string-theory–originated theoretical particle that is a perfect candidate for low-mass particle dark matter.
Oikonomou, Vasilis K. +3 more
core +1 more source
Compact relativistic geometries in $f(R,G)$ gravity
, 2022 One of the possible potential candidates for describing the universe's rapid expansion is modified gravity. In the framework of the modified theory of gravity $f(R,G)$, the present work features the materialization of anisotropic matter, such as compact ...
Yousaf, Z. +5 more
core +1 more source
Advanced Healthcare Materials, EarlyView.Packed hydrogel microfiber (PHM) materials consist of flexible and high aspect ratio hydrogel components that, as a bulk material, are simultaneously mechanically robust and dynamic. Cells cultured in or on PHM scaffolds can be influenced by topographical cues or interact with a dynamic environment that permits cell spreading and multicellular ...
M. Gregory Grewal +7 more
wiley +1 more source