3,633 research outputs found
LP-VIcode: a program to compute a suite of variational chaos indicators
An important point in analysing the dynamics of a given stellar or planetary
system is the reliable identification of the chaotic or regular behaviour of
its orbits. We introduce here the program LP-VIcode, a fully operational code
which efficiently computes a suite of ten variational chaos indicators for
dynamical systems in any number of dimensions. The user may choose to
simultaneously compute any number of chaos indicators among the following: the
Lyapunov Exponents, the Mean Exponential Growth factor of Nearby Orbits, the
Slope Estimation of the largest Lyapunov Characteristic Exponent, the Smaller
ALignment Index, the Generalized ALignment Index, the Fast Lyapunov Indicator,
the Othogonal Fast Lyapunov Indicator, the dynamical Spectra of Stretching
Numbers, the Spectral Distance, and the Relative Lyapunov Indicator. They are
combined in an efficient way, allowing the sharing of differential equations
whenever this is possible, and the individual stopping of their computation
when any of them saturates.Comment: 26 pages, 9 black-and-white figures. Accepted for publication in
Astronomy and Computing (Elsevier
Engorde de besugo("Pagellus Bogaraveo") en jaulas, en la rĂa de LorbĂ©
Traballo fin de mestrado (UDC.CIE). Acuicultura. Curso 2016/201
Reproductive Biology studies in genus "Anthoxanthum L." (Poaceae)
[Resumen] En este estudio se ha llevado a cabo el análisis micro-morfolĂłgico de la anatomĂa foliar de Anthoxanthum aristatum (2x) y A. odoratum (4x). Asimismo, se ha analizado un parámetro esencial de la biologĂa reproductiva, la viabilidad polĂnica. El objetivo general del trabajo fue conocer cĂłmo afecta el nivel de ploidĂa a los parámetros analizados. En total, seis poblaciones del NW de la PenĂnsula IbĂ©rica fueron estudiadas. Se tomaron medidas anatĂłmicas de la superficie abaxial de la epidermis en 15 individuos por poblaciĂłn. Asimismo, se hizo un examen de la viabilidad del polen mediante el empleo de Diacetato de FluoresceĂna (FDA), tĂ©cnica cuya utilidad está condicionada a que las anteras se encuentren en el estadio de maduraciĂłn adecuado.
Los resultados micro-morfolĂłgicos obtenidos permiten diferenciar los niveles de ploidĂa en base a los caracteres estudiados, presentando el tetraploide valores más altos. Los resultados del test de viabilidad polĂnica muestran un aumento de la misma en la especie diploide con respecto a su pariente tetraploide. Este resultado obtenido para Anthoxanthum L. es coherente con lo observado en la literatura.[Abstract] Both the micro-morphology and the pollen viability (essential in a plant reproductive biology) of two species in the Anthoxanthum polyploid complex have been assessed in this study. More particularly, the taxa A. aristatum (2x) and A. odoratum (4x) have been chosen for this research project. Our main aim was to understand they way in which ploidy level affects the analysed parameters. Overall, six populations from NW Iberian Peninsula were considered. Micro-morphological traits from the abaxial epidermal surface were measured in 15 specimens per population. Moreover, pollen viability was assessed through the use of FDA staining; a method suitable for Anthoxanthum provided that the anthers are at the right developmental stage. The obtained data were analysed through descriptive statistics and different tests of data variation and dispersal.
Our micro-morphological results alowed us to differentiate between the different species (and ploidy levels), with the tetraploid taxon showing higher values. The results of the pollen viability analysis showed and increase in the diploid species with respect to the tetraploid taxon. This result is consistent with what has been found in the literature.Traballo fin de grao (UDC.CIE). BioloxĂa. Curso 2014/201
Debats entorn de la funciĂł social de la telesĂ tira polĂtica. La perspectiva de l'equip de producciĂł de Polònia (TV3)
Polònia is a political satire show broadcast on the Catalan public television network TV3.
On the air since 2006, the show — which features popular Spanish and Catalan politicians
impersonated by actors — has maintained remarkable ratings this whole time. With this
background, this study aims to observe and examine how the creative team of Polònia
frames both their work and the phenomenon of politainment through qualitative
interviews. A subsequent theme analysis is used to both detect key debate points and
the interviewees' opinions on these subjects. Topics such as the role of television in
explaining what politics is to citizens, the social function of politainment and the
particularities of Polònia among other formats in this phenomenon or the existence
of a bond between comedic content and the public service to be provided by TV3
have shown themselves to be the main debate points.Polònia Ă©s un format de sĂ tira polĂtica en emissiĂł a TV3 des de l'any 2006. El programa
presenta diversos personatges de l'actualitat polĂtica i televisiva de Catalunya i de la
resta d'Espanya imitats per actors i ha mantingut unes notables xifres d'audiència.
Aquest article pretén analitzar, mitjançant entrevistes en profunditat, quina visió té
l'equip productiu de Polònia de la seva feina i del politainment com a fenomen. L'anà lisi
temĂ tica de les entrevistes permet de detectar els punts de debat clau, aixĂ com les
opinions dels entrevistats en aquests Ă mbits. D'aquest estudi sorgeixen temes clars, com
el paper de la televisiĂł per explicar en què consisteix la polĂtica a la ciutadania, la funciĂł
del politainment i les particularitats de Polònia dins aquest fenomen o l'existència d'un
vincle entre el contingut d'humor i la missiĂł de servei pĂşblic que ha de complir TV3
EconomĂa y felicidad : la paradoja de Easterlin en Galicia
[Resumen]: En el presente trabajo se estudian las bases de la denominada “economĂa de la
Felicidad”. En un primer lugar se analiza el concepto de felicidad en Economia
identificándolo con el de bienestar subjetivo revelado para posteriormente revisar la
relación existente entre renta y felicidad. En particular se prestará una especial
atenciĂłn a la “paradoja de Easterlin”, y las posibles explicaciones desde la teorĂa de la
misma. En una segunda parte, se aborda la citada paradoja desde una perspectiva
empĂrica. Partiendo de los resultados de la Encuesta Mundial de Valores para Galicia
realizada en el 2001, se busca constatar si la poblaciĂłn gallega se adapta a la
paradoja, es decir, analizar el papel que el ingreso juega en el bienestar subjetivo
revelado de los gallegos. Los modelos logit propuestos evidencian la importancia de
variables esperables como la salud, libertad percibida o satisfacciĂłn vital, pero
igualmente el peso especial de las variable ligadas a relaciones personales y capital
social. El ingreso se muestra como una variable secundaria, conforme a lo que predice
la paradoja.[Abstract]: In this paper we study the foundations of the so-called "Economics of
Happiness". In a first analyze the concept of happiness in Economics identifying
subjective wellbeing in later revealed to review the relationship between income and
happiness. In particular, we pay particular attention to the "Easterlin paradox", and
possible explanations from the theory of it. In a second part, the aforementioned
paradox is addressed from an empirical perspective. Based on the results of the World
Values Survey conducted in Galicia in 2001, is seeking determine whether the Galician
population adapts to the paradox, that is, to analyze the role that income plays in
subjective well-revealed of the Galicians. Proposed logit models show the importance
of expected variables such as health, perceived freedom or life satisfaction, but also
the special weight of the variables related to personal relationships and social capital.
Income is shown as a secondary endpoint, as predicted by the paradox.Traballo fin de grao (UDC.ECO). Ciencias empresariais. Curso 2012/201
Medicine or caring science in Ancient Greece
Buscando en los orĂgenes de la Historia podemos encontrar los inicios de la medicina o ciencia del curar
y con ellos los inicios de la EnfermerĂa; si nos remontamos a Grecia y sobre todo a su Ă©poca clásica (siglo
III al V a.C.) o también llamada de Pericles, observamos que se utilizaban palabras precursoras de las que
hoy en dĂa utilizamos en las ciencias de la salud o que incluso algunas son las mismas.
En este trabajo pretendo entroncar la mitologĂa, la medicina y la enfermerĂa de la Grecia clásica, para valorar
su origen y su significado, demostrando que estas ciencias se han desarrollado desde los orĂgenes de la
humanidad y continĂşan en nuestros dĂas, además, tal como se dice en diferentes ocasiones: un colectivo que
conoce sus orĂgenes puede valorar mejor su presente y participar en su desarrollo de forma más efectiva.Looking back in history we could trace the onset of so called medicine or caring science, together with
the onset of nursing. Returning to Greece and its classical period (3rd or 5th century B.C) or Pericles's century,
we could observe they used the original words to those we use nowadays in the health sciences. Some
of those words are even exactly the same.
The present study explores mythology, medicine and nursing in classical Greece, in order to evaluate its
origin and meaning, and proving that those sciences have developed from the beginning of mankind to the
present time. As has been said over and again: a collective who knows its origins could better evaluate its present,
and participate in its further development in a more effective way
Ab Initio Study of Structural, Electronic, and Hyperfine Properties of n-type SnO2:Ta Semiconductor
A detailed theoretical first-principles study of structural, electronic, and hyperfine properties at Sn and Ta sites of undoped and Ta-doped rutile SnO2 is presented, using the Full-Potential Augmented Plane Wave plus local orbitals (FP-APW+lo) method. In the Ta-doped systems, we performed calculations for two different charge states. The predicted electric-field-gradient (EFG) tensor, the key magnitude in this study, for both charge states of the impurity result to be almost equal and in good agreement with Time-Differential Perturbed γ–γ Angular Correlation (TDPAC) results in 181Ta-doped SnO2 thin films. This study enables at present to discuss the origin of the EFG and the role played by the structural anisotropic contractions introduced by the Ta atom and the impurity charge state on the hyperfine properties. To determine the correct charge state of the impurity, we performed energetic studies, predicting the metallic behavior of degenerate semiconductors, in agreement with resistivity experimental results obtained in samples with the same Ta dilution.Fil: Darriba, German Nicolas. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - La Plata. Instituto de FĂsica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de FĂsica La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de FĂsica; ArgentinaFil: Muñoz, Emiliano Luis. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de FĂsica; ArgentinaFil: Errico, Leonardo Antonio. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - La Plata. Instituto de FĂsica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de FĂsica La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de FĂsica; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires; ArgentinaFil: RenterĂa, Mario. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - La Plata. Instituto de FĂsica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de FĂsica La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de FĂsica; Argentin
Verlinde gravity effects on the orbits of the planets and the Moon in the Solar System
In this work, we address the effects of a phenomenon known as Verlinde gravity. Here we show that its effect over the planets and the Moon in our Solar System is quite negligible. We find that the Verlinde gravity effects on the orbits of planets are at least 10 times smaller than the precision with which we can determine the Sun’s mass, and the one on the orbit of the Moon is about 100 times smaller than the precision with which we can determine the Earth’s mass. These results let us infer that statements in the literature that Verlinde gravity is ruled out by the observed motion of planets in our Solar System are not correct.Fil: Yoon, Youngsub. Investigador Independiente; Corea del SurFil: Darriba, Luciano Ariel. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - La Plata. Instituto de AstrofĂsica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias AstronĂłmicas y GeofĂsicas. Instituto de AstrofĂsica La Plata; Argentin
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