Browsing PHY Research Publications (from 2011) by Title
Now showing items 1-20 of 61
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Accessibility and selective stabilization of the principal spin states of iron by pyridyl versus phenolic ketimines: modulation of the (6)a(1) <-> t-2(2) ground-state transformation of the [fen4o2](+) chromophore
(AMER CHEMICAL SOC, 2012-08-06)Several potentially tridentate pyridyl and phenolic Schiff bases (apRen and HhapRen, respectively) were derived from the condensation reactions of 2-acetylpyridine (ap) and 2'-hydroxyacetophenone (Hhap), respectively, with ... -
Adjusting neutrino interaction models and evaluating uncertainties using NOvA near detector data
(EDP Sciences, 2020-12-04)The two-detector design of the NOvA neutrino oscillation experiment, in which two functionally identical detectors are exposed to an intense neutrino beam, aids in canceling leading order effects of cross-section uncertainties. ... -
Biologically motivated quantum neural networks
(IEEE, 2017)This paper presents one step toward creating the building blocks for machine intelligence that is inspired by its biological equivalent. The authors' quantum learning methods (deep quantum learning) are applied to quantum ... -
Cation distribution and dielectric properties of nanocrystalline gallium substituted nickel ferrite
(Elsevier B.V., 2014-02-16)Nano crystalline NiFe2−xGaxO4, 0.0 ⩽ x ⩽ 1 ferrite was prepared by citrate method. The structural and micro structural evolutions of the nanophase have been studied using X-ray powder diffraction and the Rietveld method. ... -
Chapter 1 -- Quantum neural computation of entanglement is robust to noise and decoherence
(Elsevier, 2017)Measurement and witnesses of entanglement remain an important issue in quantum computing. Most witnesses will work for only a very restricted class of states, while measurements commonly require lengthy procedures. Quantum ... -
Chronologically dating the early assembly of the Milky Way
(Springer Nature, 2021-05-17)The standard cosmological model predicts that galaxies are built through hierarchical assembly on cosmological timescales$^{1,2}.$ The Milky Way, like other disk galaxies, underwent violent mergers and accretion of small ... -
Constraints on oscillation parameters from $\nu_e$ appearance and $\nu_\mu$ disappearance in NOvA
(American Physical Society, 2017-06-05)Results are reported from an improved measurement of $\nu_\mu \rightarrow \nu_e$ transitions by the NOvA experiment. Using an exposure equivalent to $6.05\times10^{20}$ protons-on-target 33 $\nu_e$ candidates were observed ... -
Constraints on the distance moduli, helium, and metal abundances, and ages of globular clusters from their RR Lyrae and non-variable horizontal branch stars. II. multiple stellar populations in 47 Tuc, M3, and M13
(IOP Publishing, 2017-11-10)We present a new set of horizontal branch (HB) models computed with the MESA stellar evolution code. The models adopt alpha-enhanced Asplund et al. metal mixtures and include the gravitational settling of He. They are used ... -
Development, thermal and dielectric investigations of $PVDF-Y_2O_3$ polymer nanocomposite films
(Springer, 2021-04-03)This work involves preparing $PVDF-Y_2O_3$ polymer nanocomposites to improve thermal and dielectric properties. X-ray diffraction, SEM, FTIR, TGA and dielectric measurements were applied for these films. The cubic crystal ... -
Effect of gallium additions on reduction, carburization and Fischer-Tropsch activity of iron catalysts
(Springer US, 2018-07)Undoped and gallium-doped iron oxide catalysts (100Fe, 100Fe:2Ga, and 100Fe:5Ga) were prepared by following a continuous co-precipitation technique using ammonium hydroxide as precipitant. The catalysts were characterized ... -
Effect of H2S in syngas on the Fischer-Tropsch synthesis performance of a precipitated iron catalyst
(Elsevier B.V., 2016-03-05)The sulfur limit, the relationship between the sulfur added and the surface Fe atoms lost (Fe/S), and mechanism of sulfur poisoning were studied using an iron Fischer-Tropsch synthesis (FTS) catalyst (100 Fe/5.1 Si/2.0Cu/3.0K). ... -
Effect of support pretreatment temperature on the performance of an iron Fischer-Tropsch catalyst supported on silica-stabilized alumina
(MDPI, 2018-02-12)The effect of support material pretreatment temperature, prior to adding the active phase and promoters, on Fischer-Tropsch activity and selectivity was explored. Four iron catalysts were prepared on silica-stabilized ... -
The effects of individual metal contents on isochrones for C, N, O, Na, Mg, Al, Si, and Fe
(IOP Publishing, 2016-07-28)The individual characteristics of C, N, O, Na, Mg, Al, Si, and Fe on isochrones have been investigated in this study. Stellar models have been constructed for various mixtures in which the content of each element is changed ... -
Enhancement of the critical current density in FeO-coated MgB2 thin films at high magnetic fields
(BEILSTEIN-INSTITUT, 2011-12-14)The effect of depositing FeO nanoparticles with a diameter of 10 nm onto the surface of MgB2 thin films on the critical current density was studied in comparison with the case of uncoated MgB2 thin films. We calculated the ... -
Experimental pairwise entanglement estimation for an N-qubit system: a machine learning approach for programming quantum hardware
(Springer, 2020-11-03)Designing and implementing algorithms for medium- and large-scale quantum computers is not easy. In the previous work, we have suggested, and developed, the idea of using machine learning techniques to train a quantum ... -
First measurement of electron neutrino appearance in NOvA
(American Physical Society, 2016-04-13)We report results from the first search for $\nu_\mu\to\nu_e$ transitions by the NOvA experiment. In an exposure equivalent to $2.74\times10^{20}$ protons-on-target in the upgraded NuMI beam at Fermilab, we observe 6 events ... -
First measurement of muon-neutrino disappearance in NOvA
(American Physical Society, 2016-03-25)This paper reports the first measurement using the NOvA detectors of $\nu_\mu$ disappearance in a $\nu_\mu$ beam. The analysis uses a 14 kton-equivalent exposure of $2.74 \times 10^{20}$ protons-on-target from the Fermilab ... -
Fischer-Tropsch synthesis: Activity and selectivity of chi-Fe5C2 and circle minus-Fe3C carbides
(American Chemical Society, 2014-08-10)Two different iron carbides, Hägg (χ-Fe5C2) and cementite (ϴ-Fe3C) for Fischer-Tropsch synthesis (FTS) was investigated. Both iron carbides were oxidized to Fe3O4 during FTS. Hägg carbide (χ-Fe5C2), initially exhibits ... -
Fischer-Tropsch synthesis: Deactivation as a function of potassium promoter loading for precipitated iron catalyst
(Springer, 2014-10)The effect of potassium promoter loading (0, 0.5, 1.0 and 2.0 atomic ratio) on the performance of precipitated iron catalysts was investigated during Fischer-Tropsch synthesis using a continuously stirred tank reactor. ... -
Fischer-Tropsch synthesis: Effect of activation gas after varying Cu promoter loading over K-promoted Fe-based catalyst
(© Springer, 2014-09)The effects of activation gas and copper promoter loading on the Fischer-Tropsch synthesis performance of potassium promoted precipitated iron-based catalysts were investigated using a continuously stirred tank reactor. ...