Results 31 to 40 of about 475,022 (324)

Reducing Zero-point Systematics in Dark Energy Supernova Experiments [PDF]

, 2010
We study the effect of filter zero-point uncertainties on future supernova dark energy missions. Fitting for calibration parameters using simultaneous analysis of all Type Ia supernova standard candles achieves a significant improvement over more ...
A. Bonissent, A. Stebbins, A.G. Kim, Aldering, Amanullah, Astier, Branch, C. Stoughton, Cardelli, Copin, D. Gerdes, D. Tucker, Dawson, de Putter, E.V. Linder, G. Bernstein, G. Kushner, H. Shukla, Hicken, Hsiao, J. Christiansen, Kim, Kim, Kowalski, L. Faccioli, L. Gladney, Linder, Linder, Linder, M. Brown, N. Connolly, N. Mostek, Nordin, Perlmutter, Perlmutter, R. Miquel, Riess, S. Deustua, S. McKee, Samsing, W. Carithers, Wood-Vasey   +41 more
core   +5 more sources

THE GOODNESS OF SIMULTANEOUS FITS IN ISIS

Acta Polytechnica, 2016
In a previous work, we introduced a tool for analyzing multiple datasets simultaneously, which has been implemented into ISIS. This tool was used to fit many spectra of X-ray binaries. However, the large number of degrees of freedom and individual datasets raise an issue about a good measure for a simultaneous fit quality.
Kühnel, Matthias, Falkner, Sebastian, Grossberger, Christoph, Ballhausen, Ralf, Dauser, Thomas, Schwarm, Fritz-Walter, Kreykenbohm, Ingo, Nowak, Michael A., Pottschmidt, Katja, Ferrigno, Carlo, Rothschild, Richard E., Martínez-Núñez, Silvia, Torrejón, José Miguel, Fürst, Felix, Klochkov, Dmitry, Staubert, Rüdiger, Kretschmar, Peter, Wilms, Jörn   +17 more
openaire   +6 more sources

FITEXC – DIFFRACTION PROFILE FITTING PROGRAM RUN IN MS EXCEL

Acta Polytechnica CTU Proceedings, 2018
We present our custom made diffraction fitting program FitExc for the basic treatment of the 1D diffraction profiles, in particular, the Intensity(2θ) of X-ray, synchrotron or neutron diffraction measurements. In the current state, the program allows for
Petr Vertat, Jan Drahokoupil
doaj   +1 more source

Measurement and Modeling of Infrared Nonlinear Absorption Coefficients and Laser-induced Damage Thresholds in Ge and GaSb [PDF]

, 2010
Using a simultaneous fitting technique to extract nonlinear absorption coefficients from data at two pulse widths, we measure two-photon and free-carrier absorption coefficients for Ge and GaSb at 2.05 and 2.5 μm for the first time, to our knowledge ...
Bohn, M. A., Coutu, Ronald A., Jr., Gonzalez, L. P., Guha, S., Murray, J. M., Schepler, K. L., Wagner, T. J.   +6 more
core   +3 more sources

Fitness Consequences of Reciprocally Asymmetric Hybridization between Simultaneous Hermaphrodites [PDF]

Zoological Science, 2009
Depending on fitness consequences, hybridization may rescue Inbred populations; generate premating barriers, reproductive Interference, or hybrid species; or extinguish a species. However, the fitness of hybrids is unpredictable without direct quantification of their performance in fitness components across multiple generations.
Amporn, Wiwegweaw, Keiichi, Seki, Hiroki, Utsuno, Takahiro, Asami   +3 more
openaire   +2 more sources

Determination of Parabolic Rate Constants from a Local Analysis of Mass-Gain Curves [PDF]

, 1998
A method is proposed to allow a more accurate evaluation of thermogravimetric data to identify diffusion or partial diffusion control of scaling kinetics. This method is based on the fitting of mass-gain data to a parabola over a short time interval. The
Monceau, Daniel, Pieraggi, Bernard
core   +1 more source

Goodness of Fit Tests for Simultaneous Autoregressive Series

Journal of the Royal Statistical Society Series B: Statistical Methodology, 1953
Summary The simplified method of derivation of Quenouille’s (1947) goodness of fit test for an autoregressive stationary series with discrete time, given by Bartlett and Diananda (1950), is extended in the present paper to the case of simultaneous autoregressive series, for which some interesting new features arise.
Bartlett, M. S., Rajalakshman, D. V.
openaire   +2 more sources

Weighing the ocean with bottom-pressure sensors: robustness of the ocean mass annual cycle estimate [PDF]

Ocean Science, 2014
We use ocean bottom-pressure measurements from 17 tropical sites to determine the annual cycle of ocean mass. We show that such a calculation is robust, and use three methods to estimate errors in the mass determination.
Joanne Williams, C. W. Hughes, M. E. Tamisiea, S. D. P. Williams   +3 more
doaj   +1 more source

Semiparametric Bayesian Time-Space Analysis of Unemployment Duration [PDF]

, 2000
In this paper, we analyze unemployment duration in Germany with official data from the German Federal Employment Office for the years 1980-1995. Conventional hazard rate models for leaving unemployment cannot cope with simultaneous and flexible fitting ...
Bender, S., Fahrmeir, Ludwig, Lang, S., Wolff, J.   +3 more
core   +1 more source

Improved allometric models to estimate the aboveground biomass of younger secondary tropical forests

Global Ecology and Conservation, 2023
Frequent human activities have resulted in a large number of tropical old-growth forests being replaced by secondary forests at different succession stages.
Bin Liu, Wensheng Bu, Runguo Zang
doaj   +1 more source