Results 31 to 40 of about 251,804 (253)

Discordance Between Systemic Lupus Erythematosus Disease Activity Index Domain Weights and Their Association With Organ Damage Accrual

Arthritis Care &Research, EarlyView.
Objective Studies of damage accrual in patients with systemic lupus erythematosus (SLE) show associations with disease activity measured by the SLE Disease Activity Index 2000 (SLEDAI‐2K), but these associations are imperfect. SLEDAI scores are powerfully influenced by weightings (1–8) assigned to each domain.
Kevin Zhang, Eric F. Morand, Sarah E. Boyd, François Petitjean, Alberta Hoi, Rachel Koelmeyer, Iolanda Miceli, Julie A. Monk, Hieu T. Nim   +8 more
wiley   +1 more source

Einstein Spaces Modeling Nonminimal Modified Gravity

, 2015
Off-diagonal vacuum and nonvacuum configurations in Einstein gravity can mimic physical effects of modified gravitational theories of $f(R,T,R_{\mu \nu}T^{\mu \nu})$ type.
Elizalde, Emilio, Vacaru, Sergiu I.
core   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Considerations on gravitational waves in higher-order local and non-local gravity

Physics Letters B, 2020
The detection of gravitational wave modes and polarizations could constitute an extremely important signature to discriminate among different theories of gravity.
S. Capozziello, M. Capriolo, S. Nojiri
doaj   +1 more source

Workflow for Design of Experiments‐Based Modeling of Species Transport and Growth Kinetics in GaN Hydride Vapor Phase Epitaxy

Advanced Engineering Materials, EarlyView.
A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič, G. Lukin, H. Torkashvand, A. Kerschbaum, M. Müller, S. Besendörfer, J. Heitmann, J. Friedrich   +7 more
wiley   +1 more source

Galaxy–Galaxy Lensing Data: f(T) Gravity Challenges General Relativity

The Astrophysical Journal
We use galaxy–galaxy lensing data to test general relativity and f ( T ) gravity at galaxy scales. We consider an exact spherically symmetric solution of f ( T ) theory, which is obtained from an approximate quadratic correction, and thus it is expected ...
Qingqing Wang, Xin Ren, Bo Wang, Yi-Fu Cai, Wentao Luo, Emmanuel N. Saridakis   +5 more
doaj   +1 more source

Implications of the Conformal Constraint on Sound Speed on the Radius of PSR J0952–0607 within Rastall Gravity

The Astrophysical Journal, 2023
It has been shown that the nonminimal coupling between geometry and matter can provide models for massive compact stars that are consistent with the conformal bound on the sound speed, $0\leqslant {c}_{s}^{2}\leqslant {c}^{2}/3$ , where the core density ...
Waleed El Hanafy, Adel Awad
doaj   +1 more source

Noether Symmetries and Covariant Conservation Laws in Classical, Relativistic and Quantum Physics

, 2010
We review the Lagrangian formulation of Noether symmetries (as well as "generalized Noether symmetries") in the framework of Calculus of Variations in Jet Bundles, with a special attention to so-called "Natural Theories" and "Gauge-Natural Theories ...
Fatibene, Fatibene, Ferraris, García, Kolář, Lorenzo Fatibene, Mauro Francaviglia, Noether, Saunders, Silvio Mercadante, Steenrod, Trautman   +11 more
core   +2 more sources

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

Advanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund, Arthur Schulz, Peter Lunkenheimer, Maryana Kraft, Thomas Bergler, Harald Oberhofer, Dirk Volkmer   +6 more
wiley   +1 more source

Towards a Resolution of the Cosmological Singularity in Non-local Higher Derivative Theories of Gravity

, 2010
One of the greatest problems of standard cosmology is the Big Bang singularity. Previously it has been shown that non-local ghostfree higher-derivative modifications of Einstein gravity in the ultra-violet regime can admit non-singular bouncing solutions.
A. Lawrence, A. Mazumdar, A. Sen, A.S. Koshelev, Anupam Mazumdar, B. Craps, B. Craps, B. Dragovich, C. de Rham, C. Deffayet, C.B. Thorn, E. Coletti, F. Hoyle, G. Calcagni, H. Bondi, H. Liu, H.J. Schmidt, I. Ellwood, I.P. Neupane, I.P. Neupane, I.Y. Aref'eva, I.Y. Aref'eva, I.Y. Aref'eva, I.Y. Aref'eva, I.Y. Aref'eva, J.D. Barrow, J.D. Barrow, K. Enqvist, K. Krasnov, K. Krasnov, K. Krasnov, L. Cornalba, M. Berkooz, M. Kiermaier, M. Schnabl, M.G. Brown, N. Arkani-Hamed, N. Barnaby, N. Barnaby, N. Barnaby, N. Barnaby, N. Barnaby, N. Jokela, N. Moeller, N. Seiberg, P. Stephens, R. Allahverdi, R. Allahverdi, S. Elitzur, S. Hirano, S. Nojiri, S. Weinberg, S. Weinberg, S.W. Hawking, T. Biswas, T. Biswas, T. Biswas, T. Biswas, T. Biswas, T. Erler, T. Koivisto, T.G. Rizzo, Tirthabir Biswas, Tomi Koivisto, W. Siegel, W. Taylor, Y. Okawa, Y.-F. Cai, Y.-F. Cai, Y.-F. Cai   +69 more
core   +1 more source