Zobrazeno 1 - 10
of 510
pro vyhledávání: '"Vikman P"'
Employing the publicly available CosmoLattice code, we conduct numerical simulations of a domain wall network and the resulting gravitational waves (GWs) in a radiation-dominated Universe in the $Z_2$-symmetric scalar field model. In particular, the
Externí odkaz:
http://arxiv.org/abs/2406.17053
Publikováno v:
Phys. Rev. D 108, 123529 (2023)
We discuss cosmic domain walls described by a tension red-shifting with the expansion of the Universe. These melting domain walls emit gravitational waves with the low-frequency spectral shape $\Omega_{gw}\propto f^{2}$ corresponding to the spectral
Externí odkaz:
http://arxiv.org/abs/2307.04582
Negative kinetic energies correspond to ghost degrees of freedom, which are potentially of relevance for cosmology, quantum gravity, and high energy physics. We present a novel wide class of stable mechanical systems where a positive energy degree of
Externí odkaz:
http://arxiv.org/abs/2305.09631
We propose a new non-trivial way to combine mimetic dark matter with the mimetic formulation of unimodular gravity. This yields a Weyl-invariant higher-derivative scalar-vector-tensor theory. We demonstrate that on-shell its behavior mimics GR with a
Externí odkaz:
http://arxiv.org/abs/2212.14867
Publikováno v:
Frontiers in Sports and Active Living, Vol 6 (2024)
In Swedish school health services, local initiatives have been taken to use physical activity on prescription (PAP) to encourage physically inactive children to become more active. Previous research shows that interprofessional collaboration plays a
Externí odkaz:
https://doaj.org/article/4c0dbbc24f324de7908dc8aa3794943e
Publikováno v:
Frontiers in Sports and Active Living, Vol 6 (2024)
School nurses are in a key position to promote children's physical activity. They engage all children in health dialogues and use different approaches to inform children about physical activity and motivate them to change their physical activity leve
Externí odkaz:
https://doaj.org/article/8d0d909829c34da68f90eb4b341af96d
Publikováno v:
JHEP 07 (2023) 154
We show that invertible transformations of dynamical variables can change the number of dynamical degrees of freedom. Moreover, even in cases when the number of dynamical degrees of freedom remains unchanged, the resulting dynamics can be essentially
Externí odkaz:
http://arxiv.org/abs/2208.05951
Publikováno v:
JCAP 11 (2022) 019
We analyse the dynamical properties of disformally transformed theories of gravity. We show that disformal transformation typically introduces novel degrees of freedom, equivalent to the mimetic dark matter, which possesses a Weyl-invariant formulati
Externí odkaz:
http://arxiv.org/abs/2207.12611
Autor:
Silje Stangeland Lie, Renate Westervik Alvestad, Nikolina Helle, Miriam Dubland Vikman, Tone Dahl-Michelsen
Publikováno v:
Uniped, Vol 47, Iss 1, Pp 18-31 (2024)
In this study we aim to explore healthcare and social work students’ experiences with VR simulation as a means of preparing for professional practice, and how these experiences contribute to their readiness for future professional roles. We collect
Externí odkaz:
https://doaj.org/article/c91a616596ef4883b64a58241b43fd5e
Publikováno v:
BioResources, Vol 19, Iss 2, Pp 2452-2465 (2024)
Paper pulp is a lignocellulosic fibrous material used in the industrial production of paper and board products. In addition to cellulose and hemicellulose, paper pulp contains 1 to 20% lignin, depending on the raw materials and pulping process used.
Externí odkaz:
https://doaj.org/article/b8f4518db7294f5297420497991cfeb1