Results 81 to 90 of about 634,467 (244)
Hydrogel‐Based 3D‐Printable Stretchable Pressure Sensor
Advanced Materials Technologies, EarlyView.We present a carbon‐black‐functionalized double‐network granular hydrogel (DNGH) pressure sensor capable of detecting pressures from 200 Pa, equivalent to a light finger touch, up to 500 kPa. The sensor exhibits signal drifts below 3.5% after 800 cycles and response times around 80 ms. Leveraging this broad sensing range, we 3D print this material into
Tianyu Yuan +4 more
wiley +1 more source
A comparative study of wormhole geometries under two different modified gravity formalism
European Physical Journal C: Particles and FieldsIn the current article, we discuss the wormhole geometries in two different gravity theories, namely $$\texttt{F}(\texttt{Q, T})$$ F ( Q , T ) gravity and $$\texttt{F}(\texttt{R, T})$$ F ( R , T ) gravity.
Sweeti Kiroriwal +3 more
doaj +1 more source
Spherically symmetric spacetimes in f(R) gravity theories
, 2008 We study both analytically and numerically the gravitational fields of stars in f(R) gravity theories. We derive the generalized Tolman-Oppenheimer-Volkov equations for these theories and show that in metric f(R) models the Parameterized Post-Newtonian ...
Daniel Sunhede +6 more
core +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
, 2020 Since the discovery of cosmic acceleration, modified gravity theories play an important role in the modern cosmology. In particular, the well-known F(R)-theories reached great popularity motivated by the easier formalism and by the prospect to find a ...
Myrzakulov, Ratbay
core
A polynomial f(R) inflation model
, 2014 Motivated by the ultraviolet complete theory of quantum gravity, for example the string theory, we investigate a polynomial $f(R )$ inflation model in detail.
Huang, Qing-Guo
core +1 more source
Advanced Materials Technologies, EarlyView.Liquid metal direct writing is advanced from a technological and fundamental point. Utilizing a kinematic bed, printing on large surfaces with irregularities is enabled. Furthermore, a pressure‐driven flow during printing is discovered that affects the thickness of traces.
Maximilian Krack +15 more
wiley +1 more source
Designing wormholes in novel power-law f(R): a mathematical approach with a linear equation of state
European Physical Journal C: Particles and FieldsWe consider the inhomogeneous Morris–Thorne wormhole metric with matter tensors characterised by a novel linear equation of state in f(R) gravity. Using the Einstein’s field equations in metric f(R) gravity we model solutions for both wormhole as well as
Subhasis Nalui, Subhra Bhattacharya
doaj +1 more source
Stability analysis of f(R)-AdS black holes
, 2011 We study the stability of f(R)-AdS (Schwarzschild-AdS) black hole obtained from f(R) gravity. In order to resolve the difficulty of solving fourth order linearized equations, we transform f(R) gravity into the scalar-tensor theory by introducing two ...
A. Cruz-Dombriz de la +35 more
core +1 more source
Passive Shape‐Adaptive Fluidic Interface for Enhanced Skin‐Sensor Coupling in Wearable Devices
Advanced Materials Technologies, EarlyView.This study presents a passive fluidic interface for wearable biosensors that adapts to static and dynamic body shape changes to maintain consistent skin contact. Flexible, fluid‐filled pouches redistribute pressure from high‐load areas to regions requiring improved contact, enhancing signal quality and comfort in a compact, low‐energy design for ...
Natalia Sanchez‐Tamayo +6 more
wiley +1 more source