Browsing Mathematics, Statistics, and Physics by Title

A linearised inverse conductivity problem for the Maxwell system at a high frequency

Isakov, Victor; Lu, Shuai; Xu, Boxi (Elsevier, 2022-04-15)

We consider a linearised inverse conductivity problem for electromagnetic waves in a three dimensional bounded domain at a high time-harmonic frequency. Increasing stability bounds for the conductivity coefficient in the ...

Linearized inverse Schrödinger potential problem at a large wavenumber

Isakov, Victor; Lu, Shuai; Xu, Boxi (Society for Industrial and Applied Mathematics Publications, 2020)

We investigate recovery of the (Schrodinger) potential function from many boundary measurements at a large wavenumber. By considering such a linearized form, we obtain a Holder type stability which is a big improvement ...

Lipschitz stability in the lateral Cauchy problem for elasticity system

Cheng, Jin; Isakov, Victor; Yamamoto, Masahiro; Zhou, Qi (Kyoto University, 2003-08-01)

We consider the isotropic elasticity system: ρ∂2 t u − μ(Δu + ∇(∇Tu))−∇(λ∇Tu) − 3 X j=1 ∇μ · (∇uj + ∂ju)ej = 0 in Ω× (0, T) for the displacement vector u = (u1, u2, u3) depending on x ∈ Ω and t ∈ (0, T) where Ω ...

Logistic vector random fields with logistic direct and cross covariances

Balakrishnan, N.; Ma, Chunsheng; Wang, Renxiang (Elsevier B.V., 2015-06)

The logistic vector random field is introduced in this paper as a scale mixture of Gaussian vector random fields, and is thus a particular elliptically contoured (spherically invariant) vector random field. Such a logistic ...

Long-baseline neutrino oscillation physics potential of the DUNE experiment: DUNE Collaboration

Meyer, Holger; Muether, Mathew; Solomey, Nickolas (Springer, 2020-10-22)

The sensitivity of the Deep Underground Neutrino Experiment (DUNE) to neutrino oscillation is determined, based on a full simulation, reconstruction, and event selection of the far detector and a full simulation and ...

Low exposure long-baseline neutrino oscillation sensitivity of the DUNE experiment

DUNE Collaboration; Abud, A. Abed; Abi, B.; Acciarri, R.; Acero, Mario A.; Meyer, Holger; Muether, Mathew; Roy, P.; Solomey, Nickolas (American Physical Society, 2022-04-25)

The Deep Underground Neutrino Experiment (DUNE) will produce world-leading neutrino oscillation measurements over the lifetime of the experiment. In this work, we explore DUNE’s sensitivity to observe charge-parity violation ...

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 cross section using newly developed reconstruction tool in the NOvA and dune near detector

Roy, Palash Kumer; Yahaya, Abdul-Wasit; Shivakoti, Sushil (Wichita State University, 2023-04-14)

The NOvA and DUNE neutrino experiments are designed to study neutrinos and their interaction properties with matter. Neutrinos, the most abundant massive particle in the universe. They are produced inside the sun, supernovae, ...

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 ...