The physics of rotational flattening and the point core model

A point mass at the center of an ellipsoidal homogeneous fluid is used as a simple model to study the effect of rotation on the shape and external gravitational field of planets and stars. Maclaurin's analytical result for a homogenous body is generalized to this model. The absence of a third order term in the Taylor expansion of the Maclaurin function leads to further simple but very accurate analytical results connecting the three observables: oblateness ($\epsilon$), gravitational quadrupole ($J_{2}$), and angular velocity parameter ($q$). These are compared to observational data for the planets. The moments of inertia of the planets are calculated and compared to published values. The oblateness of the Sun is estimated. Oscillations near equilibrium are studied within the model.Comment: 23 pages, 2 figures, one tabl

Inmigrantes argentinos en España: acomodación fonética, morfológica y léxica a la variedad de la ciudad de Málaga

The aim of this project is to establish the sociolinguistic accommodation of an Argentinean-speaking community distinguishing between: a) young immigrants (n = 12), and b) adult Argentinean immigrants (n = 12) in the city of Malaga, Spain. We will compare the accommodation of these two groups in order to determine if there are differences that could be related to age, gender, time of residence in the city of Malaga, etc.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

On the different ways of being a bi-dialectal immigrant. From speech isolation through code-switching to full integration. The case of Argentineans in Malaga (Spain).

In this paper we analyse the accommodation (convergence) or divergence of young immigrants born in Buenos Aires, Argentina but living in Malaga, Spain (n = 22). For analysing this community, we took advantage of previous studies on dialects in contact such as Auer et. al. (2000), Hinskens et. al. (2016), Kerswill & Williams (2000), or Trudgill (1986), among others. We have focused our attention on a very salient feature of the variety of Buenos Aires: the realization patterns of the voiced palatal fricative /ʝ/ (n = 1176) by young immigrant speakers. In such an immigration context, different realizations of /ʝ/ are observable, from open [j] to voiceless fricative realizations [ʃ]. An acoustic analysis based on standardised zero crossings rate, relative intensity, and other complementary measurements allows us to set the acoustic parameters underlying palatal /ʝ/ allophones, and to reveal a clear recession in the use of the native closed – and even voiceless – allophones by the Buenos Aires young immigrant speakers.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech