Global ETD Search

101	An evaluation of tyrosine, tryptophan, and dopa as agents capable of preventing depigmentation of the hair of mice subjected to x-ray irradiation / Crowl, Robert Harold January 1964 (has links) No description available. Biology Melanocytes X-rays
102	Effects of x-ray radiation on survival of the cereal leaf beetle, oulema melanopus (L.) / Carey, Walter Emmitt January 1968 (has links) No description available. Biology Beetles X-rays
103	A silicon diode mosaic array vidicon tube for x-ray imaging / Jacoby, Benjamin Franklin January 1969 (has links) No description available. Engineering X-rays Television
104	An energy dispersive X-ray diffraction study of vitreous silica / Meek, Thomas Thornton January 1977 (has links) No description available. Engineering Silica X-rays
105	The evolution of active galactic nuclei in clusters of galaxies from the Dark Energy Survey Bufanda, E., Hollowood, D., Jeltema, T. E., Rykoff, E. S., Rozo, E., Martini, P., Abbott, T. M. C., Abdalla, F. B., Allam, S., Banerji, M., Benoit-Lévy, A., Bertin, E., Brooks, D., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Cunha, C. E., da Costa, L. N., Desai, S., Diehl, H. T., Dietrich, J. P., Evrard, A. E., Fausti Neto, A., Flaugher, B., Frieman, J., Gerdes, D. W., Goldstein, D. A., Gruen, D., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Kuehn, K., Kuropatkin, N., Lima, M., Maia, M. A. G., Marshall, J. L., Melchior, P., Miquel, R., Mohr, J. J., Ogando, R., Plazas, A. A., Romer, A. K., Rooney, P., Sanchez, E., Santiago, B., Scarpine, V., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Tarle, G., Thomas, D., Tucker, D. L., Walker, A. R. 01 March 2017 (has links) The correlation between active galactic nuclei (AGNs) and environment provides important clues to AGN fuelling and the relationship of black hole growth to galaxy evolution. In this paper, we analyse the fraction of galaxies in clusters hosting AGN as a function of redshift and cluster richness for X-ray-detected AGN associated with clusters of galaxies in Dark Energy Survey (DES) Science Verification data. The present sample includes 33 AGNs with LX > 1043 erg s(-1) in non-central, host galaxies with luminosity greater than 0.5L(*) from a total sample of 432 clusters in the redshift range of 0.1< z <0.95. Analysis of the present sample reveals that the AGN fraction in red-sequence cluster members has a strong positive correlation with redshift such that the AGN fraction increases by a factor of similar to 8 from low to high redshift, and the fraction of cluster galaxies hosting AGN at high redshifts is greater than the low-redshift fraction at 3.6 sigma. In particular, the AGN fraction increases steeply at the highest redshifts in our sample at z > 0.7. This result is in good agreement with previous work and parallels the increase in star formation in cluster galaxies over the same redshift range. However, the AGN fraction in clusters is observed to have no significant correlation with cluster mass. Future analyses with DES Year 1 through Year 3 data will be able to clarify whether AGN activity is correlated to cluster mass and will tightly constrain the relationship between cluster AGN populations and redshift. galaxies: active X-rays: galaxies X-rays: galaxies: clusters.
106	MODEL ATMOSPHERES FOR X-RAY BURSTING NEUTRON STARS Medin, Zach, Steinkirch, Marina von, Calder, Alan C., Fontes, Christopher J., Fryer, Chris L., Hungerford, Aimee L. 21 November 2016 (has links) The hydrogen and helium accreted by X-ray bursting neutron stars is periodically consumed in runaway thermonuclear reactions that cause the entire surface to glow brightly in X-rays for a few seconds. With models of the emission, the mass and radius of the neutron star can be inferred from the observations. By simultaneously probing neutron star masses and radii, X-ray bursts (XRBs) are one of the strongest diagnostics of the nature of matter at extremely high densities. Accurate determinations of these parameters are difficult, however, due to the highly non-ideal nature of the atmospheres where XRBs occur. Observations from X-ray telescopes such as RXTE and NuStar can potentially place strong constraints on nuclear matter once uncertainties in atmosphere models have been reduced. Here we discuss current progress on modeling atmospheres of X-ray bursting neutron stars and some of the challenges still to be overcome. stars: neutron X-rays: binaries X-rays: bursts
107	Characterisation and application of a laser-based hard X-ray source Grätz, Matthias. January 1998 (has links) Thesis (doctoral)--Lund Institute of Technology, Lund University, 1998. / Added t.p. with thesis statement inserted. Includes bibliographical references.
108	Characterisation and application of a laser-based hard X-ray source Grätz, Matthias. January 1998 (has links) Thesis (doctoral)--Lund Institute of Technology, Lund University, 1998. / Added t.p. with thesis statement inserted. Includes bibliographical references.
109	Direct method of measuring intensity of diffraction pattern by photoelectric cell Brandhorst, Armin Ervin. January 1931 (has links) Call number: LD2668 .T4 1931 B71 X-rays--Diffraction. Masters theses
110	Structural transitions in cobalt-insulin investigated with semi-time resolved cryocrystallography and high pressure crystallography Nicholson, James Martin January 1997 (has links) No description available. 571.4 Protein; Diffraction; X-rays

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