Ab initio calculations of Ca III Stark broadening parameters,transition probabilities and radiative lifetimes

We have determined matrix elements for all experimental configurations of Ca III, including the 3s3p63d configuration. These values have been obtained using intermediate coupling (IC). For these IC calculations, we have used the standard method of least-squares fitting from the experimental energy levels, using the computer code developed by Robert Cowan. In this paper, using these matrix elements, we report the calculated values of the Ca III Stark widths and shifts for 148 spectral lines, of 56 Ca III spectral line transition probabilities and of eight radiative lifetimes of Ca III levels. The Stark widths and shifts, calculated using the Griem semi-empirical approach, correspond to the spectral lines of Ca III and are presented for an electron density of 1017 cm?3 and temperatures T = 1.0?10.0 (×104 K). The theoretical trends of the Stark broadening parameter versus the temperature are presented for transitions that are of astrophysical interest. There is good agreement between our calculations, for transition probabilities and radiative lifetimes, and the experimental values presented in the literature. We have not been able to find any values for the Stark parameters in the references.

Theoretical Stark broadening parameters for spectral lines arising from the 2p5ns, 2p5np and 2p5nd electronic configurations of MgIII

In the present work we report theoretical Stark widths and shifts calculated using the Griem semi-empirical approach, corresponding to 237 spectral lines of MgIII. Data are presented for an electron density of 1017 cm?3 and temperatures T = 0.5?10.0 (104 K). The matrix elements used in these calculations have been determined from 23 configurations of MgIII: 2s22p6, 2s22p53p, 2s22p54p, 2s22p54f and 2s22p55f for even parity and 2s22p5ns (n = 3?6), 2s22p5nd (n = 3?9), 2s22p55g and 2s2p6np (n = 3?8) for odd parity. For the intermediate coupling (IC) calculations, we use the standard method of least-squares fitting from experimental energy levels by means of the Cowan computer code. Also, in order to test the matrix elements used in our calculations, we present calculated values of 70 transition probabilities of MgIII spectral lines and 14 calculated values of radiative lifetimes of MgIII levels. There is good agreement between our calculations and experimental radiative lifetimes. Spectral lines of MgIII are relevant in astrophysics and also play an important role in the spectral analysis of laboratory plasma. Theoretical trends of the Stark broadening parameter versus the temperature for relevant lines are presented. No values of Stark parameters can be found in the bibliography.

Empirical analysis of traffic volume for the application of the options theory to highway concessions

*************************************************************************************** EL WCTR es un Congreso de reconocido prestigio internacional en el ámbito de la investigación del transporte que hasta el 2010 publicaba sus libros de abstracts con ISBN. Por ello consideramos que debería seguir teníendose en cuenta para los indicadores de calidad ******************************************************************************************* Investment projects in the field of transportation infrastructures have a high degree of uncertainty and require an important amount of resources. In highway concessions in particular, the calculation of the Net Present Value (NPV) of the project by means of the discount of cash flows, may lead to erroneous results when the project incorporates certain flexibility. In these cases, the theory of real options is an alternative tool for the valuation of concessions. When the variable that generates uncertainty (in our case, the traffic) follows a random walk (or Geometric Brownian Motion), we can calculate the value of the options embedded in the contract starting directly from the process followed by that variable. This procedure notably simplifies the calculation method. In order to test the hypothesis of the evolution of traffic as a Geometric Brownian Motion, we have used the available series of traffic in Spanish highways, and we have applied the Augmented Dickey-Fuller approach, which is the most widely used test for this kind of study. The main result of the analysis is that we cannot reject the hypothesis that traffic follows a Geometric Brownian Motion in the majority of both toll highways and free highways in Spain.

Housing For Young People, Córdoba (2011)

HOUSING FOR YOUNG PEOPLE, CÓRDOBA (2011). COLUMBUS’S EGG = EL HUEVO DE COLÓN

Marginalidad vertical : 8 formas de marginalidad vertical para 20 casos de estudio en Madrid

Marginalidad vertical : 8 formas de marginalidad vertical para 20 casos de estudio en Madrid

Interiormente sentida lloraba la Religion de Nuestro Padre San Agustin, el lamentable sucesso de un hijo suyo, sin que àzia fuera se le oyessen los gemidos, por ocultar la causa, y no querer ofender con la defensa [Texto impreso]

Se refiere al ajusticiamiento de Fray Facundo Ribera

Colomb dans les fers, a Ferdinand et Isabelle, après la découvert de l'Amérique ... : [Texto impreso] précédée d'un précis historique sur Colomb

Sign. : []4, A-I8, K4

Carta que el R.P.M. Fray Bautista Abad, Vicario provincial del Reyno de Valencia, del Orden de San Agustin escriuio al ... Duque de Veraguas ... : [Texto impreso] [setiembre à 18 de 1680]

Según Medina, Biblioteca Hispanoamericana, VI, 6152, podría estar impresa en Madrid, 1680

Noticia, y manifiesto verdadero de lo que se ha tratado, y resuelto en una junta, que tuvo el ... Duque de Veraguas, Virrey ... del Reyno de Valencia, con quatro Theologos [Texto impreso]

Hay un ejemplar encuadernado con: Manifestacion iuridica sobre el derecho de inmunidad y sagrado de las iglesias y monasterios, paraque [sic] no se hagá extracciones viole>tas de los refugiados à ellas por la Iusticia secular.. (XVII/42).

Respuesta del Encm>º [sic] Señor Arzobispo al quarto papel que el Excm>º Señor Virrey le escriviò [Texto impreso]

Se refiere a la violenta muerte de Fray Facundo Ribera

Respuesta del Excm>º Señor Arçobispo, al papel en derecho del Excm>º Señor Virrey del 17 del corriente [Texto impreso]

Al final : "22 de Setiembre 1680"

Quinto papel de su Exc el señor Virrey, al Excm>º Señor Arçobispo, en respuesta de su carta de 16 del corriente [Texto impreso]

Se refiere al ajusticiamiento de Fray Facundo Ribera

Copia de vna carta que escribiò el licenciado Antonio de Castro, à vn cavallero amigo suyo, de la Ciudad de Valecia, remitiendole el papel adjunto [Texto impreso]

Contiene de p. 3 a 20 : Respuesta al escandaloso papel theologico.

Breue epilogo de la execucion execrable de Iusticia, que mandò hacerel [sic]... Duque de Veragua... en la persona de Fray Iuan Facundo Ribera..., y juntamente... en defensa de inmunidad de la Iglesia... por ... Don Fray Iuan Thomàs de Rocaberti. [Texto impreso]

Hay un ejemplar encuadernado con: Manifestacion iuridica sobre el derecho de inmunidad y sagrado de las iglesias y monasterios, paraque [sic] no se hagá extracciones viole>tas de los refugiados à ellas por la Iusticia secular.. (XVII/42).

Respuesta al discurso theologico y canonista, o por mejor dezir a la apologia, que por autor anonymo se ha publicado en defensa del Señor Duque de Veraguas, sobre la muerte executada en la persona de Fray Iuan Facundo de Ribera [Texto impreso]

Texto firmado por Lázaro Roca y Prado