Results 151 to 160 of about 6,479 (312)
Equivalence of scalar-tensor theories and scale-dependent gravity
We present a novel equivalence between scale-dependent (SD) gravity and scalar-tensor theories (STTs) that have only a single scalar field with a canonical kinetic term in the Einstein frame and a conformal coupling to the metric tensor. In particular,
Käding, Christian; orcid: +6 more
core +1 more source
Vector Theory of Gravity: quantum and classical effects, renormalization
, 2011 16 pages, 4 ...
openaire +2 more sources
The Anatomical Record, EarlyView.Abstract Scientists have been captivated by the ability to regenerate, focusing on uncovering the mechanisms of epimorphic regeneration and applying them to human medicine. The axolotl (Ambystoma mexicanum) has become the most intensively studied model in tetrapod regeneration research, particularly concerning limb regeneration.
Vivien Bothe, Nadia Fröbisch
wiley +1 more source
Quantum-gravitational null Raychaudhuri equation
Journal of High Energy PhysicsWe consider a congruence of null geodesics in the presence of a quantized spacetime metric. The coupling to a quantum metric induces fluctuations in the congruence; we calculate the change in the area of a pencil of geodesics induced by such fluctuations.
Sang-Eon Bak +3 more
doaj +1 more source
Harmonic maps, SU (N) skyrme models and yang-mills theories [PDF]
, 2002 This thesis examines the construction of static solutions of (3+l)-dimensional SU{N) Skyrme models, usual and alternative, and pure massive SU(N) Yang-Mills theories.
Wospakrik, Hans Jacobus
core
On Geometry and Symmetries in Classical and Quantum Theories of Gauge Gravity
, 2019 PhD thesis, 167 pages. The first few chapters may serve an (almost) self-contained introduction into differential geometry of Cartan connections and gauge gravity. The special emphasis is paid to symmetries, as well as contact between infinitesimal (`microscopic') and integral (`coarse-grained') pictures is exhibited, in a background independent ...
openaire +2 more sources
An osteohistological analysis of Triceratops (Ornithischia: Ceratopsidae) cranial ornamentation
The Anatomical Record, EarlyView.Abstract Ceratopsids are among the most distinctive and well known extinct Cretaceous vertebrates, yet many details regarding the growth and composition of their cranial features are still not fully anatomically described or understood. In particular, striking cranial adornments such as the postorbital horns and parietal‐squamosal frill of Triceratops ...
Kyle D. Obuszewski +2 more
wiley +1 more source
Integrating whole‐bone and regional analyses to understand human scapular growth
The Anatomical Record, EarlyView.Abstract This study investigates ontogenetic changes in human scapular morphology using three‐dimensional geometric morphometrics with whole‐bone and region‐specific analyses. The aim is to evaluate whether the scapula follows a regular developmental pattern and whether its functionally distinct components, the scapular spine (SS) and glenoid fossa ...
Azahara Salazar‐Fernández +3 more
wiley +1 more source
I-Love-Q relations for neutron stars in dynamical Chern Simons gravity
, 2017 Neutron stars are ideal to probe, not only nuclear physics, but also strong-field gravity. Approximate universal relations insensitive to the star's internal structure exist among certain observables and are useful in testing general relativity, as they ...
Kent Yagi +7 more
core +1 more source