Results 91 to 100 of about 9,758,782 (389)

A gap between two approaches of dimensional reduction for a six-dimensional Kaluza-Klein theory [PDF]

Eur. Phys. J. Plus 140, 149 (2025)
Inspired by the five-dimensional Kaluza-Klein theory, we would like to study the dimensional reduction issue of six-dimensional Kaluza-Klein extension in this paper. In particular, we will examine two possible approaches of dimensional reduction from six-dimensional spacetimes to four-dimensional ones. The first one is a direct dimensional reduction, i.
arxiv   +1 more source

On the consistency of coset space dimensional reduction [PDF]

Phys.Lett.B656:152-157,2007, 2007
In this letter we consider higher-dimensional Yang-Mills theories and examine their consistent coset space dimensional reduction. Utilizing a suitable ansatz and imposing a simple set of constraints we determine the four-dimensional gauge theory obtained from the reduction of both the higher-dimensional Lagrangian and the corresponding equations of ...
arxiv   +1 more source

Structural and mechanistic basis for the regulation of the chloroplast signal recognition particle by (p)ppGpp

FEBS Letters, EarlyView.
LHCPs are transported to the thylakoid membrane via the (cp)SRP pathway. This process involves a transit complex of (cp)SRP43, (cp)SRP54 and LHCP, which interacts with (cp)FtsY and Alb3 at the membrane. GTP hydrolysis by (cp)SRP54 and (cp)FtsY triggers complex dissociation.
Victor Zegarra, Paul Weiland, Pauline Anka Plitzko, Julia Thiery, Laura Czech, Felix Willmund, Patricia Bedrunka, Gert Bange   +7 more
wiley   +1 more source

Image quality comparisons of coil setups in 3T MRI for brain and head and neck radiotherapy simulations

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose MRI is increasingly used for brain and head and neck radiotherapy treatment planning due to its superior soft tissue contrast. Flexible array coils can be arranged to encompass treatment immobilization devices, which do not fit in diagnostic head/neck coils. Selecting a flexible coil arrangement to replace a diagnostic coil should rely
Evangelia Kaza, Jeffrey P. Guenette, Christian V. Guthier, Steven Hatch, Alexander Marques, Lisa Singer, Jonathan D. Schoenfeld   +6 more
wiley   +1 more source

Three-dimensional matching is NP-Hard [PDF]

arXiv, 2020
The standard proof of NP-Hardness of 3DM provides a power-$4$ reduction of 3SAT to 3DM. In this note, we provide a linear-time reduction. Under the exponential time hypothesis, this reduction improves the runtime lower bound from $2^{o(\sqrt[4]{m})}$ (under the standard reduction) to $2^{o(m)}$.
arxiv  

Consistent dimensional reduction of five-dimensional off-shell supergravity

, 2005
There are some points to notice in the dimensional reduction of the off-shell supergravity. We discuss a consistent way of the dimensional reduction of five-dimensional off-shell supergravity compactified on S^1/Z_2.
E. B. Bogomol’ny, Hiroyuki Abe, Yutaka Sakamura   +2 more
core   +1 more source

Vacuum polarization in two-dimensional static spacetimes and dimensional reduction [PDF]

, 2002
We obtain an analytic approximation for the effective action of a quantum scalar field in a general static two-dimensional spacetime. We apply this to the dilaton gravity model resulting from the spherical reduction of a massive, non-minimally coupled ...
Akira Tomimatsu, Alessandro Fabbri, D.N. Page, G. Chika, K.W. Howard, K.W. Howard, M. Buric, M.R. Brown, M.R. Brown, P. Candelas, P. Sutton, P.R. Anderson, P.R. Anderson, Patrick J. Sutton, Piero Nicolini, R. Balbinot, R. Balbinot, R. Balbinot, R. Bousso, Roberto Balbinot, S. Nojiri, S.M. Christensen, S.M. Christensen, S.W. Hawking, V. Frolov, V. Mukhanov, V.P. Frolov, V.P. Frolov, W. Kummer   +28 more
core   +2 more sources

Dimensional reduction of the Dirac theory

Journal of Physics A: Mathematical and Theoretical, 2023
Abstract We perform a reduction from three to two spatial dimensions of the physics of a spin- 1 2 fermion coupled to the ...
Giuliano Angelone, Elisa Ercolessi, Paolo Facchi, Davide Lonigro, Rocco Maggi, Giuseppe Marmo, Saverio Pascazio, Francesco V Pepe   +7 more
openaire   +3 more sources

Distinct dysregulated pathways in sporadic and Lynch syndrome‐associated colorectal cancer offer insights for targeted treatment

FEBS Letters, EarlyView.
This study explores the distinct molecular mechanisms underlying Lynch syndrome‐associated and sporadic colorectal cancer (CRC). By highlighting the therapeutic potential of targeting the PI3K‐Akt pathway in Lynch syndrome‐associated CRC and the Wnt pathway in sporadic CRC, the findings open avenues for personalised treatment strategies, aiming to ...
May J. Krause, Musalula Sinkala, Raj Ramesar   +2 more
wiley   +1 more source

Evaluation of intrafraction couch shifts for proton treatment delivery in head‐and‐neck cancer patients: Toward optimal imaging frequency

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose Treatment planning for head‐and‐neck (H&N) cancer, in particular oropharynx, nasopharynx, and paranasal sinus cases, at our center requires noncoplanar proton beams due to the complexity of the anatomy and target location. Targeting accuracy for all beams is carefully evaluated by using image guidance before delivering proton beam ...
Nrusingh C. Biswal, Dario B. Rodrigues, Weiguang Yao, Jason K. Molitoris, Matthew E. Witek, Shifeng Chen   +5 more
wiley   +1 more source