Results 21 to 30 of about 112,408 (233)

Cosmological Perturbation Theory Revisited [PDF]

, 2011
Increasingly accurate observations are driving theoretical cosmology toward the use of more sophisticated descriptions of matter and the study of nonlinear perturbations of FL cosmologies, whose governing equations are notoriously complicated.
Uggla, Claes, Wainwright, John
core   +1 more source

How Fluids Bend: the Elastic Expansion for Higher-Dimensional Black Holes [PDF]

, 2013
Hydrodynamics can be consistently formulated on surfaces of arbitrary co-dimension in a background space-time, providing the effective theory describing long-wavelength perturbations of black branes. When the co-dimension is non-zero, the system acquires
Armas, Jay
core   +2 more sources

FUNDAMENTAL CONSEQUENCES OF A NEW INTRINSIC TIME MEASURE-PLASTICITY AS A LIMIT OF THE ENDOCHRONIC THEORY

, 1980
: A new measure of intrinsic time is introduced which broadens the endochronic theory and lends it a wider predictive scope. Idealized plastic models are shown to be constitutive subsets of the general theory and the phenomenon of yield is proved to be a
K. Valanis
semanticscholar   +1 more source

Dynamical laws of superenergy in General Relativity

, 2007
The Bel and Bel-Robinson tensors were introduced nearly fifty years ago in an attempt to generalize to gravitation the energy-momentum tensor of electromagnetism.
Alfonso García-Parrado Gómez-Lobo, Anderson A, Bel L, Bel L, Bel L, Bel L, Bergqvist G, Bergqvist G, Bergqvist G, Chevreton M, Ellis G F R, Eriksson I, Eriksson I, Hawking S W, Herrera L, Herrera L, Jackson D, Klainerman S, Lazkoz R, Maartens R, Martín-García J M, Mashoon B, Naber G L, Penrose R, Penrose R Rindler W, Senovilla J M M, Senovilla J M M, Stephani H, Szabados L, Thorne K S   +29 more
core   +1 more source

On Two Kinds of Differential Operators on General Smooth Surfaces [PDF]

, 2013
Two kinds of differential operators that can be generally defined on an arbitrary smooth surface in a finite dimensional Euclid space are studied, one is termed as surface gradient and the other one as Levi-Civita gradient.
Xie, Xi-Lin
core  

Geometry of crossing null shells

, 2003
New geometric objects on null thin layers are introduced and their importance for crossing null-like shells are discussed. The Barrab\`es--Israel equations are represented in a new geometric form and they split into decoupled system of equations for two ...
Ashtekar, Barrabès, Belinfante, Belinfante, Dirac, Dray, Hájı́ček, Hájı́ček, Hájı́ček, Hájı́ček, Hájı́ček, Hájı́ček, Hájı́ček, Israel, Israel, Jacek Jezierski, Jezierski, Jezierski, Kijowski, Kijowski, Kijowski, Kijowski, Kouletsis, Louko, Magli, Mars, Raychaudhuri, Redmount, Taub   +28 more
core   +2 more sources

Intrinsic galaxy shapes and alignments I: Measuring and modelling COSMOS intrinsic galaxy ellipticities [PDF]

, 2013
The statistical properties of the ellipticities of galaxy images depend on how galaxies form and evolve, and therefore constrain models of galaxy morphology, which are key to the removal of the intrinsic alignment contamination of cosmological weak ...
Abraham, Allgood, Altay, B. Joachimi, Bailin, Bailin, Bartelmann, Bernstein, Bernstein, Bertin, Bett, Bett, Bett, Bildfell, Binggeli, Binney, Bower, Brainerd, Bridle, Bridle, Bundy, Catelan, Cole, Croft, Davis, E. Semboloni, Erben, Faltenbacher, Fukugita, H. Hoekstra, Hahn, Hahn, Hao, Harker, Heavens, Heymans, Heymans, Hilbert, Hirata, Hoekstra, Hung, Ilbert, J. Hartlap, Jing, Joachimi, Joachimi, Joachimi, Joachimi, Kaiser, Kazantzidis, King, King, Kitching, Knebe, Knebe, Komatsu, Kuhlen, Lambas, Laureijs, Leauthaud, Lee, Mandelbaum, Mandelbaum, Melchior, Mobasher, P. E. Bett, P. Schneider, Parry, Percival, Pereira, Refregier, Rhodes, S. Hilbert, Scarlata, Schneider, Schrabback, Scoville, Spergel, Springel, Springel, T. Schrabback, Takada, van den, van Uitert, Zhang   +84 more
core   +2 more sources

The epithelial barrier theory proposes a comprehensive explanation for the origins of allergic and other chronic noncommunicable diseases

FEBS Letters, EarlyView.
Exposure to common noxious agents (1), including allergens, pollutants, and micro‐nanoplastics, can cause epithelial barrier damage (2) in our body's protective linings. This may trigger an immune response to our microbiome (3). The epithelial barrier theory explains how this process can lead to chronic noncommunicable diseases (4) affecting organs ...
Can Zeyneloglu, Huseyn Babayev, Ismail Ogulur, Sena Ardicli, Yagiz Pat, Duygu Yazici, Bingjie Zhao, Lihong Chang, Xiaoqing Liu, Paolo D'Avino, Manru Li, Ceren Biçer, Fatma Hacer Kurtoğlu Babayev, Raja Dhir, Kari C. Nadeau, Marie‐Charlotte Brüggen, Mubeccel Akdis, Cezmi A. Akdis   +17 more
wiley   +1 more source

Geometry of Generic Isolated Horizons

, 2002
Geometrical structures intrinsic to non-expanding, weakly isolated and isolated horizons are analyzed and compared with structures which arise in other contexts within general relativity, e.g., at null infinity.
Abhay Ashtekar, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Christopher Beetle, Chrusciel P, Damour T, Dreyer O, Friedrich H, Jerzy Lewandowski, Lewandowski J, Lewandowski J, Lewandowski J, Newman E T, Newman E T, Pejerski D W, Penrose R, Rendall A   +22 more
core   +1 more source

Using a Supramolecular Approach to Engineer Modular Hydrogel Platforms for Culturing Protoplasts – from General Tissue Engineering to Cellular Agriculture

Advanced Biology, EarlyView.
Using supramolecular monomers, various hydrogel culture systems were formulated to culture protoplasts; including 2D, 2.5D, and 3D hydrogels. Depending on the culture platform, bioactive functionalization led to protoplast enlargement (2D and 2.5D) or plasmolysis (3D). This work shows the potential to modularly engineer synthetic platforms for cellular
Maritza M. Rovers, Erik J. Slootweg, Ferdinand C. O. Los, Patricia Y. W. Dankers   +3 more
wiley   +1 more source