Results 61 to 70 of about 167,529,233 (288)

Probing the geometries of wormholes: A comparative study of f(R,T) and f(Q,T) theories in the presence of BEC matter

Nuclear Physics B
This study explores wormhole solutions within two distinct modified gravity theories, namely f(R,T) gravity and f(Q,T) gravity, incorporating Bose-Einstein condensate (BEC) dark matter to analyze their geometric properties.
Chaitra Chooda Chalavadi, H. Aruna Kumara, V. Venkatesha   +2 more
doaj   +1 more source

Testing modified gravity theory in the Milky Way [PDF]

Physical Review D, 2018
We perform a test of John Moffat's modified gravity theory (MOG) within the Milky Way, adopting the well-known ``rotation curve'' method. We use the dynamics of observed tracers within the disk to determine the gravitational potential as a function of galactocentric distance and compare that with the potential that is expected to be generated by the ...
Negrelli, Carolina Soledad, Benito, Maria, Landau, Susana Judith, Iocco, Fabio, Kraiselburd, Lucila   +4 more
openaire   +3 more sources

Embedded Direct Ink Writing of Thermoset and Elastomeric Polymers via Frontal Polymerization

Advanced Functional Materials, EarlyView.
Embedded frontal polymerization direct ink writing (FP‐DIW) combines frontal ring‐opening metathesis polymerization with embedded 3D printing to decouple deposition from curing. A yield‐stress support bath stabilizes low‐viscosity inks, while on‐demand thermal initiation enables controlled front propagation. This approach expands the accessible feature
Mohammad Tanver Hossain, Yun Seong Kim, Pallab Layak, Pranav Krishnan, Young bum Lee, Minjiang Zhu, Shubh Singh, Philippe H. Geubelle, Paul V. Braun, Jeffery W. Baur, Nancy R. Sottos, Sameh H. Tawfick, Randy H. Ewoldt   +12 more
wiley   +1 more source

Genetically Programmed Shape‐Morphing of Engineered Living Materials

Advanced Functional Materials, EarlyView.
Here, bacterial and mammalian engineered living materials (ELMs) are presented, in which living cells direct genetically programmed and enzymatically mediated shape‐morphing. The resulting deformation and shape‐recovery can be actuated in a genetically controlled manner by an ELM incorporating out‐of‐equilibrium counteracting biochemical reactions with
Jan Becker, Yuchen Liu, Miguel Baños, Rosanne Schmachtenberg, Mahmudul Hasan, Claudia Fink‐Straube, Luai R. Khoury, Wilfried Weber   +7 more
wiley   +1 more source

Nonlinearities in modified gravity cosmology. II. Impacts of modified gravity on the halo properties

, 2013
The statistics of dark matter halos is an essential component of understanding the nonlinear evolution in modified gravity cosmology. Based on a series of modified gravity N-body simulations, we investigate the halo mass function, concentration, and bias.
Zhang, Youcai, Cui, Weiguang, Yang, Xiaohu, Zhang, Pengjie   +3 more
core   +1 more source

Violation of the Equivalence Principle in Modified Theories of Gravity [PDF]

Physical Review Letters, 2007
We study modified theories of gravity of the f(R) type in Palatini formalism. For a generic f(R) lagrangian, we show that the metric can be solved as the product of a scalar function times a rank-two tensor (or auxiliary metric). The scalar function is sensitive to the local energy-momentum density.
openaire   +3 more sources

Advances in 3D Bioprinting for Breast Cancer Modeling: Tumor Microenvironment, Metastasis, and Drug Screening

Advanced Healthcare Materials, EarlyView.
Three‐dimensional bioprinting transforms breast cancer modeling from simple constructs into spatially organized, multicellular, perfused, and patient‐derived platforms. This review shows how bioinks, cellular composition, architecture, and flow govern tumor behavior and drug response, while revealing why complexity alone is insufficient without ...
Mustafa Nakipoglu, Mahboobeh Mahmoodi, Ehsanul Hoque Apu, Fahimeh Shahabipour, Sibel Emir Diltemiz, Sanjib Saha, Halima Alem, Nureddin Ashammakhi   +7 more
wiley   +1 more source

A new approach and code for spinning black holes in modified gravity [PDF]

, 2023
We discuss and implement a spectral method approach to computing stationary and axisymmetric black hole solutions and their properties in modified theories of gravity.
David J Mulryne, Mulryne, DJ, Fernandes, PGS, Fernandes, Pedro G. S., Mulryne, David J., Pedro G S Fernandes   +5 more
core   +1 more source

Asymptotically flat vacuum solution for a rotating black hole in a modified gravity theory

European Physical Journal C: Particles and Fields, 2022
The theory of f(R)-gravity is one of the theories of modified Einstein gravity. The vacuum solution, on the other hand, of the field equation is the solution for black hole geometry.
Arghya Ranjan Das, Banibrata Mukhopadhyay   +1 more
doaj   +1 more source

The Role of Viscoelasticity in Heterogeneous Glioblastoma Stem Cell Invasion in Biomimetic 3‐Dimensional Hydrogels

Advanced Healthcare Materials, EarlyView.
The role of viscoelasticity in the invasion of heterogeneous glioblastoma stem cells (GSCs) was investigated with GSCs categorized into subgroups based on molecular profile, as Reactive, Invasive, or Constructive using viscoelastic biomimetic hyaluronan‐oxime hydrogels.
Nicole J. Blaine, Arianna Skirzynska, Allysia A. Chin, Julie Audet, Molly S. Shoichet   +4 more
wiley   +1 more source