Results 71 to 80 of about 634,467 (244)

A Super‐Adhesive Air Filter With Capillarity‐Mediated Spontaneous Particle Absorption via Dynamic Bond Exchange

Advanced Materials, EarlyView.
We address the inherently weak particle adhesion of conventional air filters by coating a dynamically crosslinked adhesive layer that delivers capillarity‐driven strong adhesion and particle absorption mediated by dynamic bond exchange. The resulting enhancement in particle adhesion enables efficient ultrafast (up to 20 m s−1) and omnidirectional ...
Junyong Park, Hyeri Jeon, Hyunwoong Park, Ji Min Lee, Yeomyung Yoon, Gyeong Hwan Choi, Sazzadul A. Rahat, Dong Wook Lee, Sohdam Jeong, Jonathan T. Pham, Chae Bin Kim, Sanghyuk Wooh   +11 more
wiley   +1 more source

Modified $f(R)$ Gravity and Thermodynamics of Time-Dependent Wormholes at Event Horizon

, 2017
In the context of modified $f(R)$ gravity theory, we study time-dependent wormhole spacetimes in the radiation background. In this framework, we attempt to generalize the thermodynamic properties of time-dependent wormholes in $f(R)$ gravity. Finally, at
Saiedi, H.
core   +2 more sources

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, Elena Colusso, Marco Tancon, Alessandro Martucci, Riccardo Parin   +4 more
wiley   +1 more source

The impact of $$f(R,\Sigma ,T)$$ f ( R , Σ , T ) gravity on strange star structure

European Physical Journal C: Particles and Fields
This research paper explores the structure of hypothetical compact stars, known as strange stars, within the framework of a novel modified theory of gravity called $$f(R,\Sigma ,T)$$ f ( R , Σ , T ) gravity.
M. A. Bakry, A. Eid, Tahia F. Dabash
doaj   +1 more source

New Cases of Universality Theorem for Gravitational Theories

, 2010
The "Universality Theorem" for gravity shows that f(R) theories (in their metric-affine formulation) in vacuum are dynamically equivalent to vacuum Einstein equations with suitable cosmological constants. This holds true for a generic (i.e.
Ashtekar A Lewandowski J, Barausse E, Bojowald M, Borowiec A, Capozziello S De Laurentis M Francaviglia M Mercadante S, Faraoni V, Fatibene L, Fatibene L, Fatibene L, Fatibene L Ferraris M Francaviglia M Godina M Kolář I, Fatibene L Francaviglia M Mercadante S, Gelfand I M, L Fatibene, M Ferraris, M Francaviglia, Olmo G J, Sotiriou T P Faraoni V, Thiemann T, Wald R M   +18 more
core   +1 more source

Understanding Operando Water Management in Hydroxide‐Exchange‐Membrane Fuel Cells

Advanced Materials Interfaces, EarlyView.
Effective water management is vital for high‐performance hydroxide‐exchange‐membrane fuel cells. Using a custom water‐flux station, this study quantifies how membrane thickness, microporous layers, and operating conditions dictate internal water transport.
Catherine M. Weiss, Shiyi Wang, Brian P. Setzler, Yushan Yan, Adam Z. Weber   +4 more
wiley   +1 more source

The Polarizations of Gravitational Waves

Universe, 2018
The gravitational wave provides a new method to examine General Relativity and its alternatives in the high speed, strong field regime. Alternative theories of gravity generally predict more polarizations than General Relativity, so it is important to ...
Yungui Gong, Shaoqi Hou
doaj   +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

Propagation and fluxes of ultra-high energy cosmic rays in $$\varvec{f(R)}$$ f ( R ) gravity theory

European Physical Journal C: Particles and Fields
In this work, we study the effect of diffusion of ultra-high energy cosmic ray (UHECR) protons in the presence of turbulent magnetic fields (TMFs) in the light of the f(R) theory of gravity.
Swaraj Pratim Sarmah, Umananda Dev Goswami   +1 more
doaj   +1 more source

Higher-dimensional inhomogeneous perfect fluid collapse in f(R) gravity

European Physical Journal C: Particles and Fields, 2017
This paper is about the $$n+2$$ n + 2 -dimensional gravitational contraction of an inhomogeneous fluid without heat flux in the framework of a f(R) metric theory of gravity.
G. Abbas, M. S. Khan, Zahid Ahmad, M. Zubair   +3 more
doaj   +1 more source