Zobrazeno 1 - 10
of 11 242
pro vyhledávání: '"A, Perrella"'
Autor:
Perrella, David
As a generalisation of the periodic orbit structure often seen in reflection or mirror symmetric MHD equilibria, we consider equilibria with other orientation-reversing symmetries. An example of such a symmetry, which is a not a reflection, is the pa
Externí odkaz:
http://arxiv.org/abs/2411.04504
Autor:
Perrella, Pablo, Velazquez, Sebastián
Given a foliation $\mathcal{F}$ on $X$ and an embedding $X\subseteq Y$, is there a foliation on $Y$ extending $\mathcal{F}$? Using formal methods, we show that this question has an affirmative answer whenever the embedding is sufficiently positive wi
Externí odkaz:
http://arxiv.org/abs/2411.04039
Autor:
Peterkovic, Zane, Upadhya, Avinash, Perrella, Christopher, Bajraktarevic, Admir, Gonzalez, Ramses Bautista, Lim, Megan, Dunning, Kylie R, Dholakia, Kishan
Low-light optical imaging refers to the use of cameras to capture images with minimal photon flux. This area has broad application to diverse fields, including optical microscopy for biological studies. In such studies, it is important to reduce the
Externí odkaz:
http://arxiv.org/abs/2410.19210
Autor:
Ahern, Emily J., Scholten, Sarah K., Locke, Clayton, Bourbeau-Hebert, Nicolas, White, Benjamin, Luiten, Andre N., Perrella, Christopher
Rubidium two-photon frequency standards are emerging as powerful contenders for compact, durable devices with exceptional stability. The field has focused on single-color excitation to date. Here we demonstrate the key advantages of a two-color excit
Externí odkaz:
http://arxiv.org/abs/2410.16654
Autor:
Perrella, Stefano, Proietti, Lorenzo, Cabot, Pere-Lluís Huguet, Barba, Edoardo, Navigli, Roberto
Machine Translation (MT) evaluation metrics assess translation quality automatically. Recently, researchers have employed MT metrics for various new use cases, such as data filtering and translation re-ranking. However, most MT metrics return assessm
Externí odkaz:
http://arxiv.org/abs/2410.05183
Annually, at the Conference of Machine Translation (WMT), the Metrics Shared Task organizers conduct the meta-evaluation of Machine Translation (MT) metrics, ranking them according to their correlation with human judgments. Their results guide resear
Externí odkaz:
http://arxiv.org/abs/2408.13831
The paper reviews the notion of $n+\frac{1}{2}$D non-autonomous Hamiltonian systems, portraying their dynamics as the flow of the Reeb field related to a closed two-form of maximal rank on a cosymplectic manifold, and naturally decomposing into time-
Externí odkaz:
http://arxiv.org/abs/2407.05692
Autor:
Ahern, E., Allison, J. W., Billington, C., Hébert, N. Bourbeau, Hilton, A. P., Klantsataya, E., Locke, C., Luiten, A. N., Nelligan, M., Offer, R. F., Perrella, C., Scholten, S. K., White, B., Sparkes, B. M., Beard, R., Elgin, J. D., Martin, K. W.
Atomic clocks have been at the leading edge of accuracy and precision since their inception in the 1950s. However, typically the most capable of these clocks have been confined to laboratories despite the fact that there are compelling reasons to app
Externí odkaz:
http://arxiv.org/abs/2406.03716
We solve "half" the problem of finding three-dimensional quasisymmetric magnetic fields that do not necessarily satisfy force balance. This involves determining which hidden symmetries are admissible as quasisymmetries, and then showing explicitly ho
Externí odkaz:
http://arxiv.org/abs/2403.03352
Ideal magnetohydrodynamic (MHD) equilibria on a Riemannian 3-manifold satisfy the stationary Euler equations for ideal fluids. A stationary solution $X$ admits a large set of ``adapted" metrics in $M$ for which $X$ solves the corresponding MHD equili
Externí odkaz:
http://arxiv.org/abs/2312.14368