Results 81 to 90 of about 272,809 (292)

Non-compact nonlinear sigma models

Physics Letters B, 2016
The target space of a nonlinear sigma model is usually required to be positive definite to avoid ghosts. We introduce a unique class of nonlinear sigma models where the target space metric has a Lorentzian signature, thus the associated group being non ...
Claudia de Rham, Andrew J. Tolley, Shuang-Yong Zhou   +2 more
doaj   +1 more source

Interconnected Porous Hydrogels with Tunable Anisotropy Through Aqueous Emulsion Bioprinting

Advanced Functional Materials, EarlyView.
A 3D bioprintable microporous bioink is developed using an aqueous two‐phase system (ATPS) composed of extracellular matrix (ECM) mimetic biopolymers. The ATPS bioink enables the fabrication of interconnected porous architectures with up to 70% porosity, supporting long‐term cell viability and 3D cell alignment, enabling a simultaneous generation of ...
Hugo Edgar‐Vilar, Francisca P. Correia, Inês M. Freitas, Vítor M. Gaspar, João F. Mano   +4 more
wiley   +1 more source

Effect of Free Trade Area Policy on Innovation Capability in the Service Industry [PDF]

Amfiteatru Economic
China has gradually established pilot free trade zones and implemented certain specific policies for its enterprises to deepen the economic system reform and expand the degree of market opening to the outside world.
Qi Dong , Yuriy Bilan
doaj   +1 more source

Influence of damping and mass-stiffness discontinuities upon the dynamic stability of a free-free beam under a gimballed thrust of periodically-varying magnitude Technical memorandum no. 103 [PDF]

Damping and mass stiffness discontinuity effects on dynamic stability of free-free beam under gimballed pulsating end ...
Hill, J. L., Kincaid, J. H., Pearson, C. M., Wang, L. H.   +3 more
core   +1 more source

Geometry‐Dependent Adhesion in Transparent Monodomain Liquid Crystal Elastomers

Advanced Functional Materials, EarlyView.
Liquid Crystal Elastomers (LCEs) are emerging as exciting pressure‐sensitive adhesives. We examine adhesion in chemically identical elastomer films, exploring the influence of geometry (director orientation) and phase (nematic or isotropic). We demonstrate the potential of these aligned films as transparent, tunable, broad‐temperature‐range smart ...
Aidan Street, Devesh Mistry, Johan Mattsson, Helen F. Gleeson   +3 more
wiley   +1 more source

Ceramic Particle‐Reinforced Medium‐Entropy Alloys With Outstanding Mechanical Properties Prepared by Novel Micro‐LPBF

Advanced Functional Materials, EarlyView.
An innovative medium entropy alloy (MEA) composite material was fabricated via micro laser powder bed fusion (μ‐LPBF) with appropriate nano‐ceramic particles doping and exhibited markedly improved overall performance, including synergistically enhanced strength and ductility, increased hardness and compressive strength, improved wear resistance and ...
Zhonglin Shen, Mingwang Fu
wiley   +1 more source

Free Vibration of Sandwich Plates and Shells by Using Zig-Zag Function

Shock and Vibration, 2009
This paper analyses the free vibration response of sandwich curved and flat panels by introducing the zig-zag function (—1)kζk (ZZF) in the displacement models of classical and higher order two-dimensional shell theories.
S. Brischetto, E. Carrera, L. Demasi
doaj   +1 more source

Transport Properties and High Temperature Raman Features of Heavily Gd-Doped Ceria

Energies, 2019
Transport and structural properties of heavily doped ceria can reveal subtle details of the interplay between conductivity and defects aggregation in this material, widely studied as solid electrolyte in solid oxide fuel cells.
Cristina Artini, Sabrina Presto, Sara Massardo, Marcella Pani, Maria Maddalena Carnasciali, Massimo Viviani   +5 more
doaj   +1 more source

Control of Polarization and Polar Helicity in BiFeO3 by Epitaxial Strain and Interfacial Chemistry

Advanced Functional Materials, EarlyView.
In BiFeO3 thin films, the interplay of interfacial chemistry, electrostatics, and epitaxial strain is engineered to stabilize homohelicity in polarization textures at the domain scale. The synergistic use of a Bi2O2‐terminated Aurivillius buffer layer and a highly anisotropic compressive epitaxial strain offers new routes to control the polar‐texture ...
Elzbieta Gradauskaite, Lilia Huynh, Natascha Gray, Quintin N. Meier, Marta D. Rossell, Morgan Trassin   +5 more
wiley   +1 more source

Discretized Thermal Green's Functions

, 2011
We present a spectral weight conserving formalism for Fermionic thermal Green's functions that are discretized in imaginary time and thus periodic in imaginary ("Matsubara") frequency. The formalism requires a generalization of the Dyson equation and the
Georges, Georges, Karrasch, Karrasch, Luttinger, Potthoff, Silver, Strand, Vidberg   +8 more
core   +1 more source