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Now showing items 16727-16746 of 24083

    • Photometric redshift estimation using Gaussian processes 

      Bonfield, D.; Sun, Yi; Davey, N.; Jarvis, M.J.; Abdalla, F.B.; Banerji, M.; Adams, R.G. (2010)
      We present a comparison between Gaussian processes (GPs) and artificial neural networks (ANNs) as methods for determining photometric redshifts for galaxies, given training-set data. In particular, we compare their degradation ...

    • A photometric redshift of z = 6.39 0.12 for GRB 050904 

      Haislip, J.B.; Nysewander, M.C.; Reichart, D.; Levan, A.; Tanvir, N.; Cenko, S.B.; Fox, D.B.; Price, P.A.; Castro-Tirado, A.J.; Gorosabel, J.; Evans, C.R.; Figueredo, E.; MacLeod, C.L.; Kirschbrown, J.R.; Jelinek, M.; Guizy, S.; Postigo, A.; Cypriano, E.S.; Lacluyze, A.; Graham, J.; Priddey, R.; Chapman, R.; Rhoads, J.E.; Fruchter, A.S.; Lamb, D.Q.; Kouveliotou, C.; Wijers, R.A.M.J.; Bayliss, M.B.; Schmidt, B.P.; Soderberg, A.B.; Kulkami, S.R.; Harrison, F.A.; Moon, D.S.; Gal-Yam, A.; Kasliwal, M.M.; Hudec, R.; Vitek, S.; Kubanek, P.; Crain, J.A.; Foster, A.C.; Clemens, J.C.; Bartelme, J.W.; Canterna, R.; Hartmann, D.H.; Henden, A.A.; Klose, S.; Park, H.; Williams, G.; Rol, E.; O'Brien, P.; Bersier, D.; Prada, F.; Pizarro, S.; Maturana, D.; Ugarte, P.; Alvarez, E.; Fernandez, A.J.M.; Jarvis, M.J.; Moles, M.; Alfaro, E.; Ivarsen, K.M.; Kumar, N.D.; Mack, C.E.; Zdarowicz, C.M.; Gehrels, N.; Barthelmy, S.; Burrows, D.N. (2006-03)

    • Photometric redshifts for the next generation of deep radio continuum surveys - I. Template fitting 

      Duncan, Kenneth J.; Brown, Michael J. I.; Williams, Wendy L.; Best, Philip N.; Buat, Veronique; Burgarella, Denis; Jarvis, Matt J.; Malek, Katarzyna; Oliver, S. J.; Rottgering, Huub J. A.; Smith, Daniel J. B. (2018-01-11)
      We present a study of photometric redshift performance for galaxies and active galactic nuclei detected in deep radio continuum surveys. Using two multiwavelength data sets, over the NOAO Deep Wide Field Survey Boötes and ...

    • Photometric variability of massive young stellar objects 

      Teixeira, G. D. C.; Kumar, M. S. N.; Smith, L.; Lucas, P. W.; Morris, C.; Borissova, J.; Monteiro, M. J. P. F. G.; Garatti, A. Caratti o; Peña, C. Contreras; Froebrich, Dirk; Gameiro, J. F. (2018-11-05)
      The Vista Variables in the Via Lactea (VVV) survey has allowed for an unprecedented number of multi-epoch observations of the southern Galactic plane. In a recent paper, 13 massive young stellar objects (MYSOs) have already ...

    • Photometrically derived masses and radii of the planet and star in the TrES-2 system 

      Barclay, T.; Huber, D.; Rowe, Jason F.; Quintana, Elisa V.; Christiansen, Jessie L.; Jenkins, J.M.; Mullally, F.; Seader, S.E.; Tenenbaum, P.; Thompson, S.E.; Fortney, J.J.; Morley, C.V.; Fabrycky, D.C.; Barentsen, G.; Bloemen, S.; Demory, B.-O.; Fulton, B.J.; Shporer, A.; Ragozzine, D. (2012-12-10)
      We measure the mass and radius of the star and planet in the TrES-2 system using 2.7 years of observations by the Kepler spacecraft. The light curve shows evidence for ellipsoidal variations and Doppler beaming on a period ...

    • Photometry and polarimetry of AM Herculis in its faint state 

      Bailey, J.; Hough, J.; Wickramasinghe, D.T. (1988)
      Infrared and optical photometry and polarimetry of AM Herculis during the faint state of its long-term light variations are presented. The contributions of the two stellar photospheres are estimated and the distance of the ...

    • Photometry and Spectroscopy of GRB 060526 : A detailed study of the afterglow and host of a high-redshift gamma-ray burst 

      Thoene, C.C.; Kann, D.A.; Johannesson, G.; Selj, J.; Jaunsen, A.O.; Fynbo, J.; Baliyan, K.S.; Bartolini, C.; Bikmaev, I.F.; Bloom, J.S.; Burenin, R.A.; Cobb, B.E.; Covino, S.; Curran, P.A.; Dahle, H.; French, J.; Ganesh, S.; Greco, G.; Guarnieri, A.; Hanlon, L.; Hjorth, J.; Ibrahimov, M.; Israel, G.L.; Jakobsson, Pall; Jensen, B.L.; Jorgensen, U.G.; Khamitov, I.M.; Malesani, D.; Masetti, N.; Naranen, J.; Pakstiene, E.; Pavlinsky, M.N.; Perley, D.A.; Piccioni, A.; Pizzichini, G.; Pozanenko, A.; Nanni, D.; Rumyantsev, V.; Sharapov, D.; Starr, D.; Sunyaev, R.A.; Terra, F.; Vreeswijk, P.M.; Wilson, C. (2010)
      Aims : With this paper we want to investigate the highly variable afterglow light curve and environment of gamma-ray burst (GRB) 060526 at z = 3.221. Methods : We present one of the largest photometric datasets ever obtained ...

    • Photon-induced entanglement of distant mesoscopic SQUID 

      Vourdas, A.; Tsomokos, D.I.; Chong, C.C. (Springer Nature, 2006)
      An experiment that involves two distant mesoscopic SQUID rings is studied. The superconducting rings are irradiated with correlated photons, which are produced by a single microwave source. Classically correlated (separable) ...

    • Photonuclear Reactions in Astrophysics 

      Rauscher, T. (2018-09-12)
      Nucleosynthesis in stars and stellar explosions proceeds via nuclear reactions in thermalized plasmas. Nuclear reactions not only transmutate elements and their isotopes, and thus create all known elements from primordial ...

    • Photoreactions in nuclear astrophysics 

      Mohr, P.; Rauscher, T.; Sonnabend, K.; Vogt, K.; Zilges, A. (2003-05-05)
      Cross sections and reaction rates of (gamma,n) reactions have been measured close above threshold with the photoactivation technique. The experimental data for W-186,Pt-190,Pt-192,Pt-198, Hg-196,Hg-198,Hg-204, Au-197, and ...

    • Photorealistic True-Dimensional Visualization of Remote Panoramic Views for VR Headsets 

      Livatino, Salvatore; Regalbuto, Alessio; Morana, Giuseppe; Signorello, Giovanni; Gallo, Giovanni; Torrisi, Alessandro; Padula, Gianluca; Pelc, Katarzyna; Malizia, Alessio; Farinella, Giovanni (2023-06-14)
      Virtual Reality headsets have evolved to include unprecedented display quality. Meantime, they have become light-weight, wireless and low-cost, which has opened to new applications and a much wider audience. Photo-based ...

    • Photosensitized and Photothermal Stimulation of Cellular Membranes by Organic Thin Films and Nanoparticles 

      Feyen, Paul L. C.; Matarèse, Bruno F. E.; Urbano, Laura; Abelha, Thais F.; Rahmoune, Hassan; Green, Mark; Dailey, Lea A.; de Mello, John C.; Benfenati, Fabio (2022-07-07)
      Conjugated polymers are increasingly exploited for biomedical applications. In this work, we explored the optical characteristics of conjugated polymers of variable chemical structures at multiple levels relevant to ...

    • Photospheric Dust in Cool Dwarfs 

      Jones, H.R.A.; Tsuji, T. (Astronomical Society of the Pacific, 1998)
      We investigate the optical and infrared spectra for a range of cool dwarfs. For M dwarfs we find that the match between observation and theory is much improved when comparisons are made with models allowing for the formation ...

    • Photothermal conversion characteristics of gold nanoparticles under different filter conditions 

      Zhang, Hui; Yang, Haijian; Chen, Hui-Jiuan; Du, Xiaoze; Wen, Dongsheng; Wu, Hongwei (2017-12-15)
      In this article, plasmonic nanopaerticles (PNP) were used to improve the solar thermal conversion efficiency and the abortion prosperity under eight different wavelength spectrum was compared. Gold nanoparticles (GNP) is ...

    • PHR 1315-6555: a bipolar planetary nebula in the compact Hyades-age open cluster ESO 96-SC04 

      Parker, Quentin A.; Frew, David J.; Miszalski, Brent; Kovacevic, Anna V.; Frinchaboy, Peter M.; Dobbie, Paul D.; Koeppen, Joachim (2011-05)
      We present a detailed study of a bipolar, possible Type I planetary nebula (PN), PHR 1315-6555 (PN G305.3-03.1), which was discovered as part of the Macquarie/AAO/Strasbourg H alpha planetary nebula project (MASH), and ...

    • Phylogenetic analysis of Pasteuria penetrans by use of multiple genetic loci 

      Charles, L.; Carbone, I.; Davies, Keith; Bird, D.; Burke, M.; Kerry, Brian R.; Opperman, Charles H. (2005-08)
      Pasteuria penetrans is a gram-positive, endospore-forming eubacterium that apparently is a member of the Bacillus-Clostridium clade. It is an obligate parasite of root knot nematodes (Meloidogyne spp.) and preferentially ...

    • Phylogenetic relationships among Zygomycetes from soil based on ITS1/2 rDNA sequences 

      Kwasna, Hanna; Ward, Elaine; Bateman, Geoffrey L. (2006-05)
      New information was obtained on the phylogeny of Zygomycetes. PCR-RFLP analysis showed ITS1/2 rDNA to provide appropriate markers for genetic studies on Zygomycetes at the population and species levels. The use of several ...

    • Physical Activity and Exercise Addiction During the Covid-19 Pandemic in Italy 

      Ceci, Franca; Di Carlo, Francesco; Burkauskas, Julius; Salone, Anatolia; De Luca, Ilaria; Cicconcelli, Dorotea; Giorgetti, Valentina; La Fratta, Irene; Todaro, Antonino; Simonato, Pierluigi; Martinotti, Giovanni; di Giannantonio, Massimo; Corazza, Ornella (2022-04-20)
      Severe restrictive measures were implemented globally to limit the spread of the Covid-19 pandemic leading to significant lifestyle changes and impacting on both the physical and the mental health of citizens. Caught by ...

    • Physical activity and hypertension in South African adults 

      Ware, L.J.; Rennie, Kirsten; Gafane, L; Collard, Jade; Nell, T.; Shutte, Aletta (2014)
      Estimates suggest that approximately 6-million South Africans have hypertension, with half classified as stage 1 (mild). Mindful of the cost of lifelong drug therapy, the South African Hypertension Society guidelines suggest ...

    • Physical activity and mental health in a student population 

      Tyson, Philip; Wilson, Kelly; Crone, Diane; Brailsford, Richard; Laws, K.R. (2010-12)
      Aims: The present study investigates the association between physical activity and mental health in an undergraduate university population based in the United Kingdom. Method: One hundred students completed questionnaires ...