Browsing Mathematics, Statistics, and Physics by Title

Machine learning applied to programming quantum computers

Steck, James E.; Behrman, Elizabeth C.; Thompson, Nathan L. (American Institute of Aeronautics and Astronautics, 2019-01-06)

We apply machine learning to “program” quantum computers, both in simulation and in experimental hardware. A major difficulty in quantum computing is developing effective algorithms that can be programmed on a quantum ...

Machine learning in NO$\nu$A near detector vertexing

Khan, Momin (Wichita State University, 2022-05)

This work presents an alternative method for a reconstruction machine learning algorithm in place of the one currently used by the NO$\nu$A (NuMI Off-axis $\nu_e$ Appearance) group for the analysis of neutrino events at ...

Manifolds with $4\frac{1}{2}$-Positive Curvature Operator of the Second Kind

Li, Xiaolong (Springer Nature, 2022-08-04)

We show that a closed four-manifold with $4\frac{1}{2}$-positive curvature operator of the second kind is diffeomorphic to a spherical space form. The curvature assumption is sharp as both ${\mathbb{CP}\mathbb{}}^2$and ...

Manifolds with nonnegative curvature operator of the second kind

Li, Xiaolong (World Scientific Publishing Co., 2023-01-13)

We investigate the curvature operator of the second kind on Riemannian manifolds and prove several classification results. The first one asserts that a closed Riemannian manifold with three-positive curvature operator of ...

Matched-pairs tests of homogeneity with applications to homologous nucleotide sequences

Ababneh, Faisal; Jermiin, Lars S.; Ma, Chunsheng; Robinson, John (Oxford University Press, 2006-05-15)

Motivation: Most phylogenetic methods assume that the sequences of nucleotides or amino acids have evolved under stationary, reversible and homogeneous conditions. When these assumptions are violated by the data, there ...

Measurement of charged pion production yields off the NuMI target

Paley, Jonathan; Messier, M. D.; Raja, R.; Akgun, U.; Asner, D. M.; Aydin, G.; Baker, W.; Barnes, P. D. Jr; Bergfeld, T.; Beverly, L.; Bhatnagar, V.; Choudhary, B.; Dukes, E. C.; Duru, F.; Feldman, G. J.; Godley, A.; Graf, N.; Gronberg, J.; Gulmez, E.; Gunaydin, Y. O.; Gustafson, H. R.; Hartouni, E. P.; Hanlet, P.; Heffner, M.; Kaplan, D. M.; Kamaev, O.; Klay, J.; Kumar, A.; Lange, D. J.; Lebedev, A.; Ling, J.; Longo, M. J.; Lu, L. C.; Materniak, C.; Mahajan, S.; Meyer, Holger; Miller, D. E.; Mishra, S. R.; Nelson, K.; Nigmanov, T.; Norman, Andrew; Onel, Y.; Penzo, A.; Peterson, R. J.; Rajaram, D.; Ratnikov, D.; Rosenfeld, C.; Rubin, H.; Seun, S.; Singh, A.; Solomey, Nickolas; Soltz, R. A.; Torun, Y.; Wilson, K.; Wright, D. M.; Wu, Q. K. (American Physical Society, 2014-09)

The fixed-target Main Injector Particle Production (MIPP) experiment, Fermilab E907, was designed to measure the production of hadrons from the collisions of hadrons of momenta ranging from 5 to 120 GeV/c on a variety of ...

Measurement of neutrino-induced neutral-current coherent $π^0$ production in the NOvA near detector

Meyer, Holger; Muether, Mathew; Solomey, Nickolas (American Physical Society, 2020-07-09)

The cross section of neutrino-induced neutral-current coherent $\pi^0$ production on a carbon-dominated target is measured in the NOvA near detector. This measurement uses a narrow-band neutrino beam with an average neutrino ...

Measurement of the neutrino mixing angle $θ_{23}$ in NOvA

Meyer, Holger; Muether, Mathew; Solomey, Nickolas (American Physical Society, 2017-04-10)

This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of $6.05\times10^{20}$ protons-on-target from the NuMI beam at the Fermi National Accelerator Laboratory. ...

Measurement of the ν$_e$-Nucleus Charged-Current Double-Differential Cross Section at ⟨$E$$_ν$⟩=2.4 GeV Using NOvA

NOvA Collaboration; Meyer, Holger; Muether, Mathew; Roy, P.; Solomey, Nickolas (American Physical Society, 2022-11-08)

The inclusive electron neutrino charged-current cross section is measured in the NOvA near detector using 8.02 ×10$^{20}$ protons-on-target in the NuMI beam. The sample of GeV electron neutrino interactions is the largest ...

Metrics of positive scalar curvature and generalised Morse functions, part II

Walsh, Mark (American Mathematical Society, 2014-01)

The surgery technique of Gromov and Lawson may be used to construct families of positive scalar curvature metrics which are parameterised by Morse functions. This has played an important role in the study of the space of ...

Mittag-Leffler vector random fields with Mittag-Leffler direct and cross covariance functions

Ma, Chunsheng (Springer Heidelberg, 2013-10)

In terms of the two-parameter Mittag-Leffler function with specified parameters, this paper introduces the Mittag-Leffler vector random field through its finite-dimensional characteristic functions, which is essentially ...

Modeling the spread of the Coronavirus

Jaeger, Adam (Wichita State University, 5/3/2020)

This talk will introduce statistical modeling concepts relating to prediction of COVID rates at a county level and specifically introduce the notion of spatial correlation, which recognizes that there is a connection between ...

Models for inviscid wakes past a normal plate

Elcrat, Alan R.; Zannetti, L. (Cambridge University Press, 2012-10-10)

Closed and open hollow wakes are considered as analytic models for the two-dimensional inviscid steady flow past a plate normal to the stream. It is shown that only open configurations which satisfy the Kutta condition ...

Models for metal-poor stars with enhanced abundances of C, N, O, Ne, Na, Mg, Si, S, Ca, and Ti, in turn, at constant helium and iron abundances

VandenBerg, Don A.; Bergbusch, Peter A.; Dotter, Aaron; Ferguson, Jason W.; Michaud, Georges; Richer, Jacques; Proffitt, Charles R. (IOP Publishing, 2012-08-10)

Recent work has shown that most globular clusters have at least two chemically distinct components, as well as cluster-to-cluster differences in the mean [O/Fe], [Mg/Fe], and [Si/Fe] ratios at similar [Fe/H] values. In ...

Models of metal-poor stars with different initial abundances of C, N, O, Mg, and Si. I. Bolometric corrections derived from new MARCS synthetic spectra and their implications for observed colour-magnitude diagrams

VandenBerg, Don A; Edvardsson, Bengt; Casagrande, Luca; Ferguson, Jason W. (Oxford University Press, 2021-11-04)

New, high-resolution MARCS synthetic spectra have been calculated for more than a dozen mixtures of the metals allowing, in turn, for variations in C:N:O, [CNO/Fe], and enhanced abundances of C, O, Mg, and Si. Bolometric ...