643,120 research outputs found
Flexible Birnbaum-Saunders distribution
In this paper, we propose a bimodal extension of the Birnbaum–Saunders model by including an extra parameter. This new model is termed flexible Birnbaum–Saunders (FBS) and includes the ordinary Birnbaum–Saunders (BS) and the skew Birnbaum–Saunders (SBS) model as special cases. Its properties are studied. Parameter estimation is considered via an iterative maximum likelihood approach. Two real applications, of interest in environmental sciences, are included, which reveal that our proposal can perform better than other competing models.Ministerio de Economía y Competitividad (MINECO). Españ
Maxwell-Huygens, Newton-Cartan, and Saunders-Knox Spacetimes
I address a question recently raised by Simon Saunders [Phil. Sci. 80(2):
22-48 (2013)] concerning the relationship between the spacetime structure of
Newton-Cartan theory and that of what I will call "Maxwell-Huygens spacetime".
This discussion will also clarify a connection between Saunders' work and a
recent paper by Eleanor Knox [Brit. J. Phil. Sci. 65(4): 863-880 (2014)].Comment: Forthcoming in Philosophy of Scienc
A distinctive new species of biting midge in the subgenus Euprojoannisia Brèthes from Mexico with new records of Neotropical species of Forcipomyia Meigen (Diptera: Ceratopogonidae)
A new species of biting midge, Forcipomyia (Euprojoannisia) bibaana, is described and illustrated from an adult male collected in the state Oaxaca, Mexico. The first records of Forcipomyia (E.) mortuifolii Saunders, F. (Lasiohelea) cornuta Saunders and F. (L.) stylifer (Lutz) are provided from Mexico as well as the first record of F. (L.) anitae Huerta & Ibáñez-Bernal from Guatemala.Fil: Huerta, Herón. Laboratorio de Entomología; MéxicoFil: Spinelli, Gustavo Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología ; Argentin
A log-Birnbaum-Saunders Regression Model with Asymmetric Errors
The paper by Leiva et al. (2010) introduced a skewed version of the
sinh-normal distribution, discussed some of its properties and characterized an
extension of the Birnbaum-Saunders distribution associated with this
distribution. In this paper, we introduce a skewed log-Birnbaum-Saunders
regression model based on the skewed sinh-normal distribution. Some influence
methods, such as the local influence and generalized leverage are presented.
Additionally, we derived the normal curvatures of local influence under some
perturbation schemes. An empirical application to a real data set is presented
in order to illustrate the usefulness of the proposed model.Comment: Submitted for publicatio
Introduction: what is Wandelweiser?
The introduction to a special issue of 'Contemporary Music Review' on Wandelweiser
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