477 research outputs found

    Examining the impact of meaning and resilience on survivors\u27 life satisfaction after Hurricane Harvey

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    The experience of a traumatic event such as a natural disaster can often lead individuals to suffer a variety of negative sequelae, including the development of posttraumatic stress symptoms. However, certain positive psychological constructs like meaning and resilience have been shown to mitigate these consequences. The purpose of this study was to explore the contributions of meaning and resilience to the life satisfaction of individuals (N = 55) impacted by 2017‚Äôs Hurricane Harvey. It was hypothesized that not only would meaning and resilience be significantly and positively related to life satisfaction but that meaning would contribute more to the prediction of life satisfaction than resilience. Significant positive relationships were found between meaning and life satisfaction (r = .51, p ‚ȧ .05) and between resilience and life satisfaction (r = .32, p ‚ȧ .05) as was expected. After conducting a multiple regression analysis, meaning was also found to significantly predict life satisfaction (ő≤ = .46, t(54) = 3.48, p = .001, pr2 = .19), and did so to a greater extent than resilience (ő≤ = .13, t(54) = .97, p = .34, pr2 = .02), which was not a statistically significant predictor in this instance. The implications of these findings are discussed, along with study strengths, limitations, and directions for research

    Microwave saturation spectroscopy of nitrogen-vacancy ensembles in diamond

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    Negatively-charged nitrogen-vacancy (NV‚ąí^-) centers in diamond have generated much recent interest for their use in sensing. The sensitivity improves when the NV ground-state microwave transitions are narrow, but these transitions suffer from inhomogeneous broadening, especially in high-density NV ensembles. To better understand and remove the sources of broadening, we demonstrate room-temperature spectral "hole burning" of the NV ground-state transitions. We find that hole burning removes the broadening caused by magnetic fields from 13^{13}C nuclei and demonstrate that it can be used for magnetic-field-insensitive thermometry.Comment: Main text: 5 pages, 4 figures. Supplement: 6 pages, 3 figure

    Teacher Quality and Sorting across Traditional Public and Charter Schools in the Detroit Metropolitan Region

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    In the quest to raise student achievement in low-performing urban schools, researchers often point to the central importance of recruitment and retention of a high quality teacher workforce

    Longitudinal spin relaxation in nitrogen-vacancy ensembles in diamond

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    We present an experimental study of the longitudinal electron-spin relaxation of ensembles of negatively charged nitrogen-vacancy (NV ) centers in diamond. The measurements were performed with samples having different NV- concentrations and at different temperatures and magnetic fields. We found that the relaxation rate T1-1 increases when transition frequencies in NV- centers with different orientations become degenerate and interpret this as cross-relaxation caused by dipole-dipole interaction.Comment: 11 pages, 9 figure

    Probe spectroscopy in an operating magneto-optical trap: the role of Raman transitions between discrete and continuum atomic states

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    We report on cw measurements of probe beam absorption and four-wave-mixing spectra in a 85^{85}Rb magneto-optical trap taken while the trap is in operation. The trapping beams are used as pump light. We concentrate on the central feature of the spectra at small pump-probe detuning and attribute its narrow resonant structures to the superposition of Raman transitions between light-shifted sublevels of the ground atomic state and to atomic recoil processes. These two contributions have different dependencies on trap parameters and we show that the former is inhomogeneously broadened. The strong dependence of the spectra on the probe-beam polarization indicates the existence of large optical anisotropy of the cold-atom sample, which is attributed to the recoil effects. We point out that the recoil-induced resonances can be isolated from other contributions, making pump-probe spectroscopy a highly sensitive diagnostic tool for atoms in a working MOT.Comment: 9 pages, 8 figure
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