Results 61 to 70 of about 1,515,012 (182)

Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the String‐Theoretical Swampland Programme

Fortschritte der Physik, Volume 74, Issue 4, April 2026.
Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley   +1 more source

Asmptotically Plane Wave Spacetimes [PDF]

, 2009
In this thesis we study aspects of plane wave spacetimes in the hope of shedding light of the nature of holography for plane waves. In particular, we would like to understand better the space of asymptotically plane wave solutions.
LE-WITT, JULIAN,ALEXANDER, Le-Witt, Julian Alexander   +1 more
core  

Rainich-type Conditions for Perfect Fluid Spacetimes [PDF]

, 2014
In this worksheet we describe and illustrate a relatively simple set of new Rainich-type conditions on an n-dimensional spacetime which are necessary and sufficient for it to define a perfect fluid solution of the Einstein field equations. Procedures are
Torre, Charles G, Dionisios Krongos, Charles G. Torre, Krongos, Dionisios   +3 more
core   +1 more source

Homogeneous Gödel-type solutions in hybrid metric-Palatini gravity

European Physical Journal C: Particles and Fields, 2018
The hybrid metric-Palatini $$f({\mathscr {R}})$$ f(R) gravity is a recently devised approach to modified gravity in which it is added to the metric Ricci scalar R, in the Einstein–Hilbert Lagrangian, a function $$f({\mathscr {R}})$$ f(R) of Palatini ...
J. Santos, M. J. Rebouças, A. F. F. Teixeira   +2 more
doaj   +1 more source

A Re‐Examination of Foundational Elements of Cosmology

Fortschritte der Physik, Volume 74, Issue 3, March 2026.
ABSTRACT This paper undertakes a conceptual re‐examination of several foundational elements of cosmology through the lens of spacetime symmetries. A new derivation of the Friedmann–Lemaître–Robertson–Walker metric is obtained by a careful conceptual examination of rotations and translations on generic manifolds, followed by solving the rotational and ...
Lavinia Heisenberg
wiley   +1 more source

Transnational literacy experiences and chronotopic identity work: A duoethnography of returnee English language teachers in China

The Modern Language Journal, Volume 110, Issue 1, Page 90-110, Spring 2026.
Abstract This duoethnographic study explores how two nonnative returnee English teachers in China negotiate their professional identities through chronotopically layered transnational literacy experiences. Drawing on the concept of the chronotope—the interconnectedness of time, space, and personhood—the analysis identifies three chronotopic ...
Shan Chen, Luping Sun
wiley   +1 more source

Riemann solitons on perfect fluid spacetimes

Filomat
In this article, we characterize Riemann solitons on perfect fluid spacetimes. Some relationship between perfect fluid spacetimes and Riemann solitons with certain soliton vector fields are established. We investigate Ricci-symmetric perfect fluid spacetimes whose metrics are Riemann solitons.
Avijit Sarkar, Urmila Biswas
openaire   +1 more source

Artificial Intelligence in Multimedia Content Generation: A Review of Audio and Video Synthesis Techniques

Journal of the Society for Information Display, Volume 34, Issue 2, Page 49-67, February 2026.
Modern AI systems can now synthesize coherent multimedia experiences, generating video and audio directly from text prompts. These unified frameworks represent a rapid shift toward controllable and synchronized content creation. From early neural architectures to transformer and diffusion paradigms, this paper contextualizes the ongoing evolution of ...
Charles Ding, Rohan Bhowmik
wiley   +1 more source

Permanent Anchors and Adaptive Throughput: Extending Proof‐of‐Access Consensus to Resolve the Blockchain Trilemma

IET Information Security, Volume 2026, Issue 1, 2026.
Contemporary distributed ledgers face an inherent trilemma when attempting to simultaneously optimize three critical properties: transaction throughput (measured in transactions per second [TPS]), network security, and node decentralization. Current decentralized storage platforms such as Filecoin encounter constraints in managing peak transaction ...
Saha Reno, G. M. Abdullah Al Kafi, Koushik Roy, peican zhu   +3 more
wiley   +1 more source

Hybrid Deference, Hybrid Chance

Philosophy and Phenomenological Research, Volume 112, Issue 1, Page 214-233, January 2026.
ABSTRACT If you learn about one kind of chance and nothing else, then you should defer to those chances. But what if you learn about more than one kind of chance? In such “hybrid” cases, familiar chance‐credence principles, like the Principal Principle, go silent when they should intuitively speak.
Alexander Meehan
wiley   +1 more source