Results 91 to 100 of about 906,607 (253)

Real–Now–Front Cosmology: A Generative Framework for Spacetime, Expansion and Dark Matter

Reports in Advances of Physical Sciences
In this paper, we develop Real–Now–Front (RNF) cosmology, a generative framework in which spacetime arises through slice-by-slice alignment of a pre-geometric chronon substrate.
Bin Li
doaj   +1 more source

Characterization of some causality conditions through the continuity of the Lorentzian distance

, 2009
A classical result in Lorentzian geometry states that a strongly causal spacetime is globally hyperbolic if and only if the Lorentzian distance is finite valued for every metric choice in the conformal class.
Minguzzi, Ettore
core   +1 more source

TNAP and PHOSPHO1 Function Synergistically to Afford Critical Control Over the Mineralization of the Postnatal Murine Skeleton

Advanced Science, EarlyView.
Biomineralization underpins skeletal development, yet its molecular control remains incompletely understood. Using a novel murine knockout model, this study reveals the essential and complementary roles of PHOSPHO1 and TNAP in postnatal skeletal development.
Lucie E. Bourne, Aikta Sharma, Scott Dillon, Jacob Keen, Soher N. Jayash, Natalie Crump, Lucinda A.E. Evans, Maya Karmali, Worachet Promruk, Claire E. Clarkin, Sonoko Narisawa, Louise Stephen, Brian L. Foster, José Luis Millán, Colin Farquharson, Katherine A. Staines   +15 more
wiley   +1 more source

Geometric analysis of slant timelike-ruled surfaces and Bertrand offsets in Minkowski 3-space

AIP Advances
This study investigates the geometric properties of slant timelike-ruled surfaces and their Bertrand offsets in Minkowski space. By deriving their parametric equations, we examine the structural characteristics of these surfaces and classify their offset
Areej A. Almoneef, Rashad A. Abdel-Baky
doaj   +1 more source

Neutrino dynamics in a non–commutative spacetime

Physics Letters B
We investigate neutrino dynamics in a spherically symmetric non–commutative black hole spacetime generated by a Lorentzian smeared matter distribution.
A.A. Araújo Filho, N. Heidari, Yuxuan Shi, Iarley P. Lobo   +3 more
doaj   +1 more source

On the coupling of Galilean-invariant field theories to curved spacetime

SciPost Physics, 2018
We consider the problem of coupling Galilean-invariant quantum field theories to a fixed spacetime. We propose that to do so, one couples to Newton-Cartan geometry and in addition imposes a one-form shift symmetry.
Kristan Jensen
doaj   +1 more source

Raman Analysis of RNA Nucleotide Strands From SARS‐CoV‐2 Variants and Subvariants: A Step Forward in the Definition of “Raman Genome”

Advanced Science, EarlyView.
Main Raman signals in RNA, related to helical backbone, ribofuranose ring, and nitrogenous bases, are affected by secondary structures that cause hyperchromic effects and significantly alter the Raman intensity. ABSTRACT Raman spectra of RNA nucleotide strands extracted from 20 SARS‐CoV‐2 strains, including the original Japanese isolate, Alpha, Beta ...
Giuseppe Pezzotti, Yoshiki Yasukochi, Gianluca Angiola, Takaharu Ueno, Saki Ikegami, Rintaro Okawa, Tetsuya Adachi, Wenliang Zhu, Osam Mazda, Alfio Grillo, Koichiro Higasa, Kazu Okuma   +11 more
wiley   +1 more source

Persistent Lorentzian Rigid Motions Generated by Slant Helices in Minkowski 3-Space

Mathematics
This paper develops a unified Lorentzian framework for persistent rigid motions generated by slant helices in three-dimensional Minkowski space and investigates their geometric and kinematic properties.
Derya Kahveci, Yusuf Yaylı
doaj   +1 more source

Electron‐Beam Enables Spatially Resolved Defect‐Mediated Work Function Modulation in FAPbI3 Perovskite Thin Films

Advanced Science, EarlyView.
Electron‐beam irradiation enables defect‐mediated work function modulation in metal halide perovskites by regulating interstitial iodides. This approach allows continuous Fermi‐level tuning and spatially resolved formation of lateral surface‐potential‐defined junctions with built‐in potential.
Hyeonho Park, Seung‐Gu Choi, Jae‐Hwan Kim, Dong‐Jun Lee, Sung‐Kwang Jung, Gwanghee Lee, HongSeok Kim, Kyung‐Hwan Jin, Jin‐Wook Lee, Seong Heon Kim   +9 more
wiley   +1 more source

Unveiling Anisotropic in‐Plane Thermal Conductivity and Thermal Expansion Coefficient in Low‐Symmetry Few‐Layer ReS2

Advanced Science, EarlyView.
Simultaneous two‐mode Raman thermometry reveals strong in‐plane anisotropic thermal conductivity and thermal expansion coefficients in low‐symmetry few‐layer ReS2. By decoupling thermal transport along the crystallographic a‐ and b‐axes within a single optical configuration, this study provides robust experimental evidence and ab initio theoretical ...
Manab Mandal, Prahalad Kanti Barman, Susmita Jana, Saroj Poudyal, Kaushalya Kumari, Sourav Mondal, Abhishek Misra, Birabar Ranjit Kumar Nanda, Pramoda Kumar Nayak, Kanikrishnan Sethupathi   +9 more
wiley   +1 more source