Results 91 to 100 of about 1,567,571 (289)
Newton-Cartan gravity and torsion
Journal of High Energy Physics, 2017 We compare the gauging of the Bargmann algebra, for the case of arbitrary torsion, with the result that one obtains from a null-reduction of General Relativity.
Eric Bergshoeff +3 more
doaj +1 more source
International Journal of Theoretical Physics, 1999 Latex 35 pages, to be published in Int. J. Theor. Phys. (1999)
openaire +3 more sources
Shaping of Biohybrid Functional Living Materials
Advanced Functional Materials, EarlyView.This work demonstrates a strategy for shaping living mycelium into functional materials by directing its natural growth. Nanoparticles armor hyphae, micron‐scale particles entangle within the network, and printed hydrogel architectures steer expansion, creating defined geometries.
Sarah Schyck +3 more
wiley +1 more source
AdS backgrounds and induced gravity
, 2019 In this paper we look for AdS solutions to generalised gravity theories in the bulk in various spacetime dimensions. The bulk gravity action includes the action of a non-minimally coupled scalar field with gravity, and a higher-derivative action of ...
Lin, Hai, Narain, Gaurav
core
Advanced Functional Materials, EarlyView.Reprogrammable multi‐material smart textiles knitted from liquid crystal elastomer fibers undergo 2D and 3D deformation under thermal and photo stimuli. Circularly knitted tubular structures reversibly contract in radial and axial directions, enabling autonomous climbing, liquid release, and micro pumping.
Xue Wan +8 more
wiley +1 more source
Universe, 2019 We use the method of the Lewis-Riesenfeld invariant to analyze the dynamical properties of the Mukhanov-Sasaki Hamiltonian and, following this approach, investigate whether we can obtain possible candidates for initial states in the context of inflation ...
Max Joseph Fahn +2 more
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Foundations of Physics, 2009 essentially the same as the version that appears in Foundations of Physics, 39, 331 (2009)
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Physical Review D, 2009 We investigate a f(R) modification of gravity that is exponential in the Ricci scalar R to explain cosmic acceleration. The steepness of this dependence provides extra freedom to satisfy solar system and other curvature regime constraints. With a parameter to alleviate the usual fine tuning of having the modification strengthen near the present, the ...
openaire +2 more sources
Triblock Polymer Engineering Enables Hydration‐Rich, High‐Performance, Fouling‐Resistant Interfaces
Advanced Functional Materials, EarlyView.A molecularly engineered triblock polymer (PHZ) rapidly reorganizes into a hydration‐rich interfacial layer on diverse surfaces, strongly suppressing hydrophobic attraction and fouling. The triblock polymer provides robust energy and steric barriers to oily foulants, enabling high‐performance antifouling at ultralow dosage.
Chenyu Qiao +6 more
wiley +1 more source
Research on the Requirement Validation Process of an eVTOL Aircraft
Engineering ProceedingsAccording to the SAEARP4754B standard, the positive development of electric vertical takeoff and landing (eVTOL) aircraft must carry out requirement management in order to ensure the traceability of requirements.
Haiyun Yang, Yiheng Li, Jing Hu
doaj +1 more source