Buscador

Encontrado(s) 12204 resultado(s)
Encontrada(s) 1221 página(s)

Forensic Analysis of Venezuelan Elections during the Chávez Presidency

  • Jiménez, Raúl
  • Hidalgo Trenado, Manuel
Contiene adjunto ficheros de datos., Hugo Chavez dominated the Venezuelan electoral landscape since his first presidential victory in 1998 until his death in 2013. Nobody doubts that he always received considerable voter support in the numerous elections held during his mandate. However, the integrity of the electoral system has come into question since the 2004 Presidential Recall Referendum. From then on, different sectors of society have systematically alleged electoral irregularities or biases in favor of the incumbent party. We have carried out a thorough forensic analysis of the national-level Venezuelan electoral processes held during the 1998-2012 period to assess these complaints. The second-digit Benford's law and two statistical models of vote distributions, recently introduced in the literature, are reviewed and used in our case study. In addition, we discuss a new method to detect irregular variations in the electoral roll. The outputs obtained from these election forensic tools are examined taking into account the substantive context of the elections and referenda under study. Thus, we reach two main conclusions. Firstly, all the tools uncover anomalous statistical patterns, which are consistent with election fraud from 2004 onwards. Although our results are not a concluding proof of fraud, they signal the Recall Referendum as a turning point in the integrity of the Venezuelan elections. Secondly, our analysis calls into question the reliability of the electoral register since 2004. In particular, we found irregular variations in the electoral roll that were decisive in winning the 50% majority in the 2004 Referendum and in the 2012 Presidential Elections., This work was supported by the Spanish Ministry of Economy and Competitiveness (Projects ECO2011-25706 and CSO2012-35852).
Proyecto:


Informe sobre calidad de las revistas en el área de Comunicación. Versión 2015

  • Santonja Garriga, María Dolores
  • Muro Subías, Inmaculada
Revistas mejor valoradas en los sistemas de evaluación, Contiene ficheros de datos., El objetivo de este informe es establecer un listado de las revistas más valoradas en los diferentes sistemas de evaluación de calidad, nacionales e internacionales. Se trata de comparar los grupos de revistas que obtienen las máximas puntuaciones en cada uno de ellos para establecer los títulos coincidentes. Aunque el resultado puede dejar fuera revistas importantes consideradas individualmente, el consenso refuerza la valoración positiva del grupo resultante. Este sistema entraña no obstante algunas dificultades, por lo que hay que tomarlo sólo como un análisis aproximativo que puede ayudar al investigador tanto a la hora de publicar como en el momento de la valoración en los diferentes procesos oficiales de acreditación y evaluación.
Proyecto:


Humans display a reduced set of consistent behavioral phenotypes in dyadic games

  • Poncela-Casasnovas, Julia
  • Gutiérrez-Roig, Mario
  • Gracia-Lázaro, Carlos
  • Vicens, Julian
  • Gómez-Gardeñes, Jesús
  • Perelló, Josep
  • Moreno, Yamir
  • Duch, Jordi
  • Sánchez, Angel
Socially relevant situations that involve strategic interactions are widespread among animals and humans alike. To study these situations, theoretical and experimental research has adopted a game theoretical perspective, generating valuable insights about human behavior. However, most of the results reported so far have been obtained from a population perspective and considered one specific conflicting situation at a time. This makes it difficult to extract conclusions about the consistency of individuals' behavior when facing different situations and to define a comprehensive classification of the strategies underlying the observed behaviors. We present the results of a lab-in-the-field experiment in which subjects face four different dyadic games, with the aim of establishing general behavioral rules dictating individuals' actions. By analyzing our data with an unsupervised clustering algorithm, we find that all the subjects conform, with a large degree of consistency, to a limited number of behavioral phenotypes (envious, optimist, pessimist, and trustful), with only a small fraction of undefined subjects. We also discuss the possible connections to existing interpretations based on a priori theoretical approaches. Our findings provide a relevant contribution to the experimental and theoretical efforts toward the identification of basic behavioral phenotypes in a wider set of contexts without aprioristic assumptions regarding the rules or strategies behind actions. From this perspective, our work contributes to a fact-based approach to the study of human behavior in strategic situations, which could be applied to simulating societies, policy-making scenario building, and even a variety of business applications., This workwas partially supported byMineco (Spain) through grants FIS2013 47532 C3 1 P (to J.D.), FIS2013 47532 C3 2 P (to J.P.), FIS2012 38266 C02 01 (to J.G. G.), and FIS2011 25167 (to J.G. G. and Y.M.); by Comunidad de Aragón (Spain) through the Excellence Group of Non Linear and Statistical Physics (FENOL) (to C.G. L., J.G. G., and Y.M.); by Generalitat de Catalunya (Spain) through Complexity Lab Barcelona (contract no. 2014 SGR 608; to J.P. and M.G. R.) and through Secretaria d’Universitats i Recerca (contract no. 2013 DI 49; to J.D. and J.V.); and by the European Union through Future and Emerging Technologies FET Proactive Project MULTIPLEX (Multilevel Complex Networks and Systems) (contract no. 317532; to Y.M., J.G. G., and J.P. C.) and FET Proactive Project DOLFINS (Distributed Global Financial Systems for Society) (contract no. 640772; to C.G. L., Y.M., and A.S.).
Proyecto:


The Impact of Immigration: Why Do Studies Reach Such Different Results?

  • Dustmann, Christian
  • Schoenberg, Uta
  • Stuhler, Jan
We classify the empirical literature on the wage impact of immigration into three groups, where studies in the first two groups estimate different relative effects, and studies in the third group estimate the total effect of immigration on wages. We interpret the estimates obtained from the different approaches through the lens of the canonical model to demonstrate that they are not comparable. We then relax two key assumptions in this literature, allowing for inelastic and heterogeneous labor supply elasticities of natives and the "downgrading" of immigrants. "Downgrading" occurs when the position of immigrants in the labor market is systematically lower than the position of natives with the same observed education and experience levels. Downgrading means that immigrants receive lower returns to the same measured skills than natives when these skills are acquired in their country of origin. We show that heterogeneous labor supply elasticities, if ignored, may complicate the interpretation of wage estimates, and particularly the interpretation of relative wage effects. Moreover, downgrading may lead to biased estimates in those approaches that estimate relative effects of immigration, but not in approaches that estimate total effects. We conclude that empirical models that estimate total effects not only answer important policy questions, but are also more robust to alternative assumptions than models that estimate relative effects., Jan Stuhler declares that he has received financial support by the Spanish Ministerio Economy Competitividad (Spain, MDM 2014-0431 and ECO2014-55858-P) and Comunidad de Madrid (MadEco-CM S2015/HUM-3444). Christian Dustmann declares that he has received financial support by the Norface Programme on Migration (funded by European national research councils) and the European Research Council, ERC Advanced grant DMEA.
Proyecto:


LSI Far Infrared Pedestrian Dataset

  • Olmeda Reino, Daniel
  • Premebida, Cristiano
  • Nunes, Urbano
  • Armingol Moreno, José María
  • Escalera Hueso, Arturo de la
The database consists of FIR images collected from a vehicle driven in outdoors urban scenarios. Images were acquired with an Indigo Omega imager, with a resolution of 164x129 pixels, a grey-level scale of 14 bits, and focal length of 318 pixels. The camera was mounted on the exterior of the vehicle, to avoid infrared filtering of the windshield. Recorded images were manually annotated, where each pedestrian is labelled as a bounding box. To prevent bias introduced by border artifacts their height is subsequently upscaled by 5%. The pedestrians appear in an up-right position., The dataset is divided in two: (i) Classification dataset: positives and randomly sampled negatives with a fixed height-width ratio of (1/2) and rescaled to 64x32 pixels, and (ii) Detection Dataset: Original positive and negative images with annotations., The classification Database is divided in a Train and a Test subset. The Train set contains 10208 positives and 43390 negatives, while the Test set contains 5944 positives and 22050 negatives. The annotated bounding boxes are resized to a constant aspect ratio (w/h) = 0.5 by changing their width appropriately. Any bounding box below 10 pixels in height is ignored. The remaining bounding boxes are resized to 64x32 pixels using bilinear interpolation. The negative samples were randomly selected from images not containing pedestrians.
Proyecto:


How Much Trade Liberalization Was There in the World Before and After Cobden-Chevalier?

  • Tena Junguito, Antonio
  • Lampe, Markus
  • Tâmega, Felipe
The Cobden-Chevalier Treaty of 1860 is regarded as central turning point in nineteenth-century trade policy, inaugurating a free trade era in Western Europe. We reexamine this story and put it into global perspective with a new database covering more than 7,500 data points for 11 categories of manufactures in 41 countries and colonies around the world between 1846 and 1880. It reveals that bilateralism after 1860 reinforced a process already underway before. Nevertheless, we highlight that trade liberalization was a global phenomenon over most of our period, so that the prominent British case appears as typical rather than exceptional., Financial support from the MCI: ECO2008-02089 and from MCI: ECO2011-25713, Publicado
Proyecto:


Datos complementarios: Acquisition of Uropygial Gland Microbiome by Hoopoe Nestlings

  • Martín-Vivaldi Martínez, Manuel Lorenzo
Datos complementarios del artículo: “Acquisition of Uropygial Gland Microbiome by Hoopoe Nestlings” publicado en Microbial Ecology (ISSN:0095-3628). DOI: https://doi.org/10.1007/s00248-017-1125-5
Proyecto:


Differentially expressed genes after treatment with hydroxytyrosol in DMBA-induced rat breast tumors

  • Granados Principal, Sergio
  • Ramírez Tortosa, María Carmen
  • Quiles Morales, José Luis
  • Ramírez Tortosa, César Luis
  • Sánchez Rovira, Pedro
  • Camacho-Corencia, P.
[Organism] Rattus norvegicus, [Experiment type] Expression profiling by array, [Overall design] Breast tumors were induced with a single oral dose of 7,12-dimethylbenz(alpha)anthracene (100 mg/kg body weight) in female Sprague-Dawley rats to test the antitumor power of orally administrated hydroxytyrosol (0.5 mg/kg body weight 5 days/week for 6 weeks). Gene expression analysis was performed in paired samples as follows: HT final trucut tumor vs initial trucut tumor (HT final vs basal). For this assay, 5 samples were chosen according to histopathologic criteria (Bloom-Richardson grade II). Gene expression profiling was carried out using Affymetrix’s GeneChip technology, using the Rat Genome 230 v2.0 array from this provider. All the protocols and apparatus were recommended by Affymetrix. Total RNA from frozen mammary tumors was extracted by RNeasy Mini kit and homogenized by QIAshredder columns according to manufacturer’s instructions. The quality and quantity of the obtained RNA was checked out through agarose electrophoresis and later spectrophotometry at 260/280 nm. Biotinylated cRNA was synthesized following the IVT labeling kit from Affymetrix and purified by the GeneChip Sample Cleanup Module from Affymetrix. The quality and quantity of the obtained cRNA was again checked out through agarose electrophoresis and posterior spectrophotometry at 260/280 nm. After hybridization, slides were washed and scanned following the manufacturer’s standard protocol. Intensity values were normalized by Robust Multichip Average method and subsequently these were filtered to remove the control sequences and those with a hybridization signal close to background. The spike controls were: BioB, BioC, BioD and Cre; because BioB was the least abundant in the samples, it was used to estimate the sensitivity of the experiment. The housekeeping control was GAPDH. After non-supervised clustering using Pearson correlation coefficient, statistical significance of gene expression was estimated by Student’s T test for paired samples using GeneSpring GX 7.3 software (Agilent)., [Platforms (1)] GPL1355 [Rat230_2] Affymetrix Rat Genome 230 2.0 Array, [Relations] BioProject PRJNA116997, 1. GSM399469 Breast tumor biopsy_hydroxytyrosol_07SE120. [Source name] Breast tumor biopsy, hydroxytyrosol, basal moment. [Characteristics] strain: Sprague-Dawley gender: female age: 12 weeks tissue: Breast tumor. Trucut Biopsy of breast tumor chemically induced with 7,12-dimethylbenz(a)anthracene before treatment with hydroxytyrosol. Such biopsy was taken when tumor had 2cm3 volume biopsy dimensions: 0.7 cm x 2.5 mm treatment: none sample: 66D2 (basal), 2. GSM399474 Total breast tumor_hydroxytyrosol_07SE135. [Source name] Total breast tumor, hydroxytyrosol, final moment. [Characteristics] strain: Sprague-Dawley gender: female age: 19 weeks tissue: Breast tumor. Breast tumor chemically induced with 7,12-dimethylbenz(a)anthracene at the moment of sacrifice. treatment: hydroxytyrosol (0,5 mg/kg weight/day, 5 days/week, for 6 weeks) by gavage after trucut biopsy. sacrifice: 7th week post-biopsy sample: 66D2 (final), 3. GSM399475 Breast tumor biopsy_hydroxytyrosol_07SE121. [Source name] Breast tumor biopsy, hydroxytyrosol, basal moment. [Characteristics] strain: Sprague-Dawley gender: female age: 12 weeks tissue: Breast tumor. Trucut Biopsy of breast tumor chemically induced with 7,12-dimethylbenz(a)anthracene before treatment with hydroxytyrosol. Such biopsy was taken when tumor had 2cm3 volume biopsy dimensions: 0.7 cm x 2.5 mm treatment: none sample: 67D3(basal), 4. GSM399476 Total breast tumor_hydroxytyrosol_07SE136. [Source name] Total breast tumor, hydroxytyrosol, final moment. [Characteristics] strain: Sprague-Dawley gender: female age: 19 weeks tissue: Breast tumor. Breast tumor chemically induced with 7,12-dimethylbenz(a)anthracene at the moment of sacrifice. treatment: hydroxytyrosol (0,5 mg/kg weight/day, 5 days/week, for 6 weeks) by gavage after trucut biopsy. sacrifice: 7th week post-biopsy sample: 67D3 (final), 5. GSM399477 Breast tumor biopsy_hydroxytyrosol_07SE122. [Source name] Breast tumor biopsy, hydroxytyrosol, basal moment. [Characteristics] strain: Sprague-Dawley gender: female age: 12 weeks tissue: Breast tumor. Trucut Biopsy of breast tumor chemically induced with 7,12-dimethylbenz(a)anthracene before treatment with hydroxytyrosol. Such biopsy was taken when tumor had 2cm3 volume biopsy dimensions: 0.7 cm x 2.5 mm treatment: none sample: 45D3 (basal), 6. GSM399478 Total breast tumor_hydroxytyrosol_07SE137. [Source name] Total breast tumor, hydroxytyrosol, final moment. [Characteristics] strain: Sprague-Dawley gender: female age: 19 weeks tissue: Breast tumor. Breast tumor chemically induced with 7,12-dimethylbenz(a)anthracene at the moment of sacrifice. treatment: hydroxytyrosol (0,5 mg/kg weight/day, 5 days/week, for 6 weeks) by gavage after trucut biopsy. sacrifice: 7th week post-biopsy sample: 45D3 (final), 7. GSM399892 Breast tumor biopsy_hydroxytyrosol_07SE123. [Source name] Breast tumor biopsy, hydroxytyrosol, basal moment. [Characteristics] strain: Sprague-Dawley gender: female age: 12 weeks tissue: Breast tumor. Trucut Biopsy of breast tumor chemically induced with 7,12-dimethylbenz(a)anthracene before treatment with hydroxytyrosol. Such biopsy was taken when tumor had 2cm3 volume biopsy dimensions: 0.7 cm x 2.5 mm treatment: none sample: 49I1 (basal), 8. GSM399893 Total breast tumor_hydroxytyrosol_07SE138. [Source name] Total breast tumor, hydroxytyrosol, final moment. [Characteristics] strain: Sprague-Dawley gender: female age: 19 weeks tissue: Breast tumor. Breast tumor chemically induced with 7,12-dimethylbenz(a)anthracene at the moment of sacrifice. treatment: hydroxytyrosol (0,5 mg/kg weight/day, 5 days/week, for 6 weeks) by gavage after trucut biopsy. sacrifice: 7th week post-biopsy sample: 49I1 (final), 9. GSM399894 Breast tumor biopsy_hydroxytyrosol_07SE124. [Source name] Breast tumor biopsy, hydroxytyrosol, basal moment . [Characteristics] strain: Sprague-Dawley gender: female age: 12 weeks tissue: Breast tumor. Trucut Biopsy of breast tumor chemically induced with 7,12-dimethylbenz(a)anthracene before treatment with hydroxytyrosol. Such biopsy was taken when tumor had 2cm3 volume biopsy dimensions: 0.7 cm x 2.5 mm treatment: none sample: 51I1 (basal), 10. GSM399912 Total breast tumor_hydroxytyrosol_07SE139. [Source name] Total breast tumor, hydroxytyrosol, final moment. [Characteristics] strain: Sprague-Dawley gender: female age: 19 weeks tissue: Breast tumor. Breast tumor chemically induced with 7,12-dimethylbenz(a)anthracene at the moment of sacrifice. treatment: hydroxytyrosol (0,5 mg/kg weight/day, 5 days/week, for 6 weeks) by gavage after trucut biopsy. sacrifice: 7th week post-biopsy sample: 51I1 (final), The aim of this study was to compare the gene expression profile changes of DMBA-induced rat breast tumors after treatment with hydroxytyrosol (a natural compound from virgin olive oil). To this end, a cDNA microarray experiment was performed (Affymetrix’s Rat Genome 230 2.0 array). This gene expression study was carried out on the tumor biopsy samples prior to hydroxytyrosol treatment, and compared with matched tumor biopsy samples after completion of the hydroxytyrosol treatment schedule. The result of this study was the identification of several genes related to apoptosis, cell cycle arrest, proliferation, differentiation, survival and transformation-related genes.
Proyecto:


Complementary material to manuscript: A test-retest assessment of the effects of mental load on ratings of affect, arousal and perceived exertion during submaximal cycling

  • Vera Vílchez, Jesús
  • Perales López, José César
  • Jiménez Rodríguez, Raimundo
  • Cárdenas Vélez, David
Open data and code for main analyses in "A test-retest assessment of the effects of mental load on ratings of affect, arousal and perceived exertion during submaximal cycling".
Proyecto:


Reseñas alemán español

  • Vilar Sánchez, Karin
El documento sólo puede leerse con ayuda del programa "Atlas.ti", Documentos en formato "Atlas.ti" que contienen los corpus y el análisis correspondientes a las reseñas españolas y alemanas. Son los datos brutos correspondientes a la ponencia "Análisis cualitativo de textos con un programa CAQDAS", presentado en el coloquio Hermeneus, en Soria, 2014. Es muy probable que dicha ponencia se publique en un futuro próximo.
Proyecto:


Buscador avanzado