5,011 research outputs found
Random Forest as a tumour genetic marker extractor
Identifying tumour genetic markers is an essential task for biomedicine. In this thesis, we analyse a dataset of chromosomal rearrangements of cancer samples and present a methodology for extracting genetic markers from this dataset by using a Random Forest as a feature selection tool
Unemployment duration among immigrants and natives: unobserved heterogeneity in a multi-spell duration model
This paper studies whether the unemployment dynamics of immigrants differ from those of
natives, paying special attention to the impact of accounting for unobserved heterogeneity
among individuals. Using a large administrative data set for Spain, we estimate multiple-spell
discrete duration models which disentangle unobserved heterogeneity from duration
dependence. Specifically, we estimate random effects models assuming that the distribution of
the effects is discrete with finite support, and fixed effects models in which the distribution of the
unobserved effects is left unrestricted. Our results show the importance of accounting for
unobserved heterogeneity and that mistaken policy implications can be derived due to improper
treatment of unmeasured variables. We find that lack of control for unobserved heterogeneity
leads to the conclusion that immigrant males have a higher probability of leaving unemployment
than natives and that the negative effect of unemployment benefits for immigrants lasts longer
than for natives. Nonetheless, the estimates which do control for unobserved heterogeneity
show the opposite results
Unobserved Heterogeneity in Multi-Spell Discrete Time Duration Models
This paper considers the estimation of discrete time duration models. We highlight the enhance identification opportunities embedded in multiple spell data to separately identify the effect of duration dependence and individual time invariant unobserved heterogeneity. We consider two types of models: (i) random effects models specifying a mass point distribution for the unobserved heterogeneity; and (ii) fixed effects models in which the distribution of the effects is left unrestricted. The availability of multiple spell data allows us to consider this type of models, in the spirit of fixed effects discrete choice panel data models. We study the finite sample properties of different estimators for previous models by means of Monte Carlo simulations. Finally, as an empirical illustration, we estimate unemployment duration models using Spanish administrative data with information on the entire labor history of the individuals.Duration models; Discrete choice; Multiple spells; Unobserved heterogeneity; Unemployment.
Unemployment Duration among Immigrants and Natives: Unobserved Heterogeneity in a Multi-Spell Duration Model
This paper studies whether the unemployment dynamics of immigrants differ from those of natives, paying special attention to the impact of accounting for unobserved heterogeneity among individuals. Using a large administrative data set for Spain, we estimate multiple-spell discrete duration models which disentangle unobserved heterogeneity from duration dependence. Specifically, we estimate random effects models assuming that the distribution of the effects is discrete with finite support, and fixed effects models in which the distribution of the unobserved effects is left unrestricted. Our results show the importance of accounting for unobserved heterogeneity and that mistaken policy implications can be derived due to improper treatment of unmeasured variables. We find that lack of control for unobserved heterogeneity leads to the conclusion that immigrant males have a higher probability of leaving unemployment than natives and that the negative effect of unemployment benefits for immigrants lasts longer than for natives. Nonetheless, the estimates which do control for unobserved heterogeneity show the opposite results.Duration models; Discrete choice; Multiple spells; Unobserved heterogeneity; Unemployment; Immigration.
Unobserved heterogeneity in multi-spell discrete time duration model
This paper considers the estimation of discrete time duration models. We highlight the enhance identification opportunities embedded in multiple spell data to separately identify the effect of duration dependence and individual time invariant unobserved heterogeneity.Duration models, Discrete choice, Multiple spells, Unobserved heterogeneity, Unemployment.
Unemployment duration among immigrants and natives: unobserved heterogeneity in a multi-spell duration model
This paper studies whether the unemployment dynamics of immigrants differ from those of natives, paying special attention to the impact of accounting for unobserved heterogeneity among individuals. Using a large administrative data set for Spain, we estimate multiple-spell discrete duration models which disentangle unobserved heterogeneity from duration dependence. Specifically, we estimate random effects models assuming that the distribution of the effects is discrete with finite support, and fixed effects models in which the distribution of the unobserved effects is left unrestricted. Our results show the importance of accounting for unobserved heterogeneity and that mistaken policy implications can be derived due to improper treatment of unmeasured variables. We find that lack of control for unobserved heterogeneity leads to the conclusion that immigrant males have a higher probability of leaving unemployment than natives and that the negative effect of unemployment benefits for immigrants lasts longer than for natives. Nonetheless, the estimates which do control for unobserved heterogeneity show the opposite results.Duration models, Discrete choice, Multiple spells, Unobserved heterogeneity, Unemployment, Immigration
Las pioneras. Escultoras españolas en la 2ÂȘ RepĂșblica
Aquellas pioneras que consolidaron su andadura en la escultura durante la 2ÂȘ RepĂșblica conforman un nuevo modelo de mujer que se
incorpora activamente a los ambientes artĂsticos. Aunque no pudieron acceder al aprendizaje acadĂ©mico oficial, recibieron lecciones de los
escultores mĂĄs ilustres del momento. Todas estas escultoras tuvieron vĂnculo familiar con destacados intelectuales o artistas, permaneciendo a
la sombra de sus padres o maridos, en un papel secundario. Sufrieron crĂticas por adentrarse en la escultura, un campo âno aptoâ para ellas.
Pero una profunda vocaciĂłn y un talento demostrado les hizo superar los impedimentos y entregarse al modelado de sus obras. Estas mujeres
dejaron una herencia, son un referente para la primera generaciĂłn de escultoras profesionales en nuestro paĂs que surgirĂĄ unas dĂ©cadas mĂĄs
tarde. Revelar sus nombres y rescatar sus obras, nos da la oportunidad de recuperar la memoria de estas mujeres y valorar con perspectiva sus
trabajosThose pioneers who consolidated their careers in sculpture in the 2nd Republic constitute a new model of woman who actively
incorporates to artistic circles. Although they could not access the official academic learning, they received lessons from the most famous
sculptors of the time. All these sculptresses had family ties to prominent intellectuals and artists, standing in the shadow of their fathers or
husbands, in a supporting role. They were criticized for working in sculpture, a field âunfitâ for them. But a deep commitment and a proven
talent made? them overcome the impediments and given to the modeling of their works. These women left an inheritance, they are a reference to
the first generation of professional sculptresses in our country that will emerge a few decades later. Disclose their names and rescue their works,
gives us the opportunity to recover these womenâs memory and evaluate their works in perspective
Escultoras andaluzas : traspasando el umbral de lo convencional
Los cambios que se han ido produciendo en la estructura social asĂ como en la jerarquĂa
artĂstica han sido aprovechados por numerosas artistas para conseguir un lugar desde
donde construir su futuro profesional. Paralelamente la evoluciĂłn que la escultura ha
sufrido a lo largo del siglo XX en cuanto al concepto y valores ha hecho mĂĄs fĂĄcil la
incorporaciĂłn de la mujer a la prĂĄctica de este ejercicio. La primacĂa del concepto sobre
la pråctica puramente formal y técnica, asà como la gran variedad de materiales
utilizados, han favorecido el trabajo haciéndolo mås ågil y menos costoso.
Conocer el camino que han seguido las escultoras andaluzas es importante para poder
valorar la totalidad de la creaciĂłn plĂĄstica tridimensional en esta regiĂłn, asĂ como el
estudio de casos nos sirve para ver como han conseguido superarse a sĂ mismas y los
numerosos obstĂĄculos que por el hecho de ser mujer les ha ido poniendo la sociedad. En
la mayorĂa de los casos estudiados ha sido la perseverancia y la innovaciĂłn en
cuestiones formales o conceptuales lo que les ha servido de trampolĂn para su
permanencia cuando no su proyecciĂłn en el mundo del arte
Grant development : effect of abiotic factors in "Octopus" vulgaris (Cuvier 1797)
[Resumen:] El pulpo es una de las especies de cefalĂłpodo con mĂĄs interĂ©s comercial. AsĂ en la costa gallega las lonjas nos muestran que durante el 2015 se han extraido 1.769.660,19Kg de pulpo, lo que supone un total de 10.211.476,29âŹ. En base a esto, el objetivo fundamental del proyecto es obtener mĂĄs informaciĂłn sobre la posibilidad de criar pulpos en cautividad, de cara a una mayor producciĂłn en un futuro prĂłximo.
Realizaremos varias pruebas que nos mostrarĂĄn el efecto de factores como la densidad de poblaciĂłn y la alimentaciĂłn en el crecimiento de los individuos. Veremos tambiĂ©n si recreando las condiciones ambientales de invierno y verano los pulpos se desarrollan igual en cautividad. Realizaremos tambiĂ©n un anĂĄlisis bioquĂmico comparativo entre los individuos salvajes y los individuos en cautividad y estudiaremos la expresiĂłn de los genes de estrĂ©s con la realizaciĂłn de q-PCRs.[Resumo:] O polbo Ă© unha das especies de cefalĂłpodos con mĂĄis interese comercial. AsĂ, na costa de Galicia mercados de peixe mostran que en 2015 foron extraĂdos 1.769.660,19Kg de polbo, representando un total de 10.211.476,29 âŹ. Con base niso, o obxectivo fundamental do proxecto Ă© para aprender mĂĄis sobre a posibilidade de aumentar o polbo en catividade, de cara a unha maior produciĂłn no futuro prĂłximo.
Imos facer varias probas que amosarĂĄ o efecto de factores tales como alimentaciĂłn ou densidade poboacional no crecemento dos individuos. TamĂ©n veremos se recreando as condiciĂłns ambientais de inverno e verĂĄn se desenvolven do mesmo xeito os polbos en catividade. Faremos unha anĂĄlise bioquĂmica comparativa entre os individuos salvaxes e os individuos en catividade e estudaremos a expresiĂłn de xenes de estrĂ©s coa realizaciĂłn de Q-PCRs.[Abstract:] The octopus is an cephalopod species with more commercial interests. So on the Galician coast fish markets show that during 2015 have been extracted 1.769.660,19Kg octopus, representing a total of 10.211.476,29 âŹ. Based on this, the fundamental objective of the project is to obtain more information about the possibility of raising octopus in captivity, facing higher production in the near future.
We will make several tests that will show the effect of factors such as population density and the food in the growth of individuals. We will also see if recreating the environmental conditions of winter and summer alike develop octopuses in captivity. We will also make a comparative biochemical analysis between wild individuals and individuals in captivity and study the expression of stress genes with conducting some q-PCRs.Traballo fin de grao (UDC.CIE). BioloxĂa. Curso 2015/201
Compartir la investigaciĂłn docente: el resultado de una experiencia multidisciplinar
Las XII Jornadas de Redes de InvestigaciĂłn en Docencia Universitaria, celebradas los dĂas 3 y 4 de julio de 2014 en la Universidad de Alicante, propusieron como tema central de debate: âEl reconocimiento docente: innovar e investigar con criterios de calidadâ. Con este propĂłsito, se presentaron a las Jornadas mĂĄs de doscientas comunicaciones, de la cuales ocho se expusieron y discutieron en la mesa de ponencias nĂșmero tres. El objeto de esta memoria es transmitir las principales ideas que se presentaron en esta mesa y las cuestiones que, con mayor interĂ©s, enriquecieron el debate
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