Results 1 to 10 of about 1,718,501 (292)

The Curled Up Dimension in Quasicrystals

open access: yesCrystals, 2021
Most quasicrystals can be generated by the cut-and-project method from higher dimensional parent lattices. In doing so they lose the periodic order their parent lattice possess, replaced with aperiodic order, due to the irrationality of the projection ...
Fang Fang, Richard Clawson, Klee Irwin
doaj   +1 more source

Group Theory of Syntactical Freedom in DNA Transcription and Genome Decoding

open access: yesCurrent Issues in Molecular Biology, 2022
Transcription factors (TFs) are proteins that recognize specific DNA fragments in order to decode the genome and ensure its optimal functioning. TFs work at the local and global scales by specifying cell type, cell growth and death, cell migration ...
Michel Planat   +5 more
doaj   +1 more source

Quantum gravity at the fifth root of unity

open access: yesPhysics Open, 2022
We consider quantum transition amplitudes, partition functions and observables for 3D spin foam models within SU(2)quantum group deformation symmetry, where the deformation parameter is postulated to be a complex fifth root of unity.
Marcelo Amaral   +2 more
doaj   +1 more source

Chemically defined elicitors activate priming in tomato seedlings

open access: yesPlant Signaling & Behavior, 2022
Tomato (Solanum lycopersicum L.) is an important crop that possesses about 35,000 genes. The treatment of plants with elicitors or pathogen attacks causes a cascade of defense reactions. We investigated tomato responses to the BamFXTM solution containing
Kiran R. Kharat, Raveendran Pottathil
doaj   +1 more source

Finite Groups for the Kummer Surface: The Genetic Code and a Quantum Gravity Analogy

open access: yesQuantum Reports, 2021
The Kummer surface was constructed in 1864. It corresponds to the desingularization of the quotient of a 4-torus by 16 complex double points. Kummer surface is known to play a role in some models of quantum gravity.
Michel Planat   +5 more
doaj   +1 more source

Perspectives on electric dipole moments of atoms and molecules [PDF]

open access: yesEPJ Web of Conferences, 2023
Searches for a permanent electric dipole moment (EDM) of a fundamental particle started with the key idea by Ramsey and Purcell of exploitation of discrete symmetries, such as parity, more than seven decades ago.
Boeschoten Alexander, Willmann Lorenz
doaj   +1 more source

Cabinet of Curiosities: The Interesting Geometry of the Angle β = arccos ((3ϕ − 1)/4)

open access: yesFractal and Fractional, 2019
In this paper, we present the construction of several aggregates of tetrahedra. Each construction is obtained by performing rotations on an initial set of tetrahedra that either (1) contains gaps between adjacent tetrahedra, or (2) exhibits an aperiodic ...
Fang Fang   +3 more
doaj   +1 more source

Progress of temporal gravity field model determination in terms of spherical harmonic coefficients via satellite-to-satellite tracking observations

open access: yes地球与行星物理论评, 2022
Temporal gravity field comprehensively reflects the migration characteristics of the earth's inner and shallow mass variations, which has been widely used in various geoscience applications.
Hao Zhou   +7 more
doaj   +1 more source

Periodic Modification of the Boerdijk–Coxeter Helix (tetrahelix)

open access: yesMathematics, 2019
The Boerdijk−Coxeter helix is a helical structure of tetrahedra which possesses no non-trivial translational or rotational symmetries. In this document, we develop a procedure by which this structure is modified to obtain both translational and ...
Garrett Sadler   +3 more
doaj   +1 more source

Dixon-Rosenfeld lines and the Standard Model

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
We present three new coset manifolds named Dixon-Rosenfeld lines that are similar to Rosenfeld projective lines except over the Dixon algebra $$\mathbb {C}\otimes \mathbb {H}\otimes \mathbb {O}$$ C ⊗ H ⊗ O .
David Chester   +4 more
doaj   +1 more source

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