Search results for "ample"
showing 10 items of 2398 documents
On the drivers of successful crowdfunding: The case of the platform Verkami
2021
This article analyzes the determinants of successful crowdfunding initiatives using a sample of 5,251 projects from the reward-based Spanish platform Verkami. In contrast to most of the literature that has measured success with a dichotomous variable, we approach success with a continuous one, namely the ratio of achievement, which is measured as the obtained resources over the total amount requested by the promoter. We consider a set of potential determinants of success, which are theoretically well-grounded and cover a variety of spheres related to project features. Results suggest that factors related to the signaling theories such as partnership, having previous experience and interact…
On the property of diffusion in the spatial error model.
2005
International audience; The aim of this paper is to illustrate the property of global spillover effects in the first-order spatial autoregressive error model and the associated diffusion process of spatial shocks. An application is provided on a sample of 145 regions over 1989–1999 and highlights the most influential regions.
Students' attitude towards the use of educational video games to develop competencies
2018
The use of educational video games (EVGs) is gaining momentum as a means to motivate and to engage students in their learning process. Nevertheless, previous research is taking for granted that students have a positive attitude towards EVGs and did not ensure a proper understanding of students' characteristics that might influence their attitude towards them. Therefore, this study's main goal is to explore four students' characteristics (perceived relevance, perceived confidence, media affinity, and perceived self-efficacy) that influence students' attitude towards the use of EVGs to develop competencies. Using the fsQCA method to analyze data gathered on a sample of 128 undergraduate stude…
Deconstrucción del “buen profesor”. Análisis de las características formales y no formales de la docencia universitaria
2016
Antecedentes: la evaluación de la calidad del profesorado universitario, desde el punto de vista del alumnado, se ha centrado principalmente en los aspectos más formales del ejercicio docente, desatendiendo así otros factores de tipo personal. Objetivo: identificar y analizar las cargas de cada uno de los distintos factores que conforman la idea de la buena docencia según el alumnado. Es decir, detectar la ecuación que da lugar al esquema mental de “buen profesor” o “buena profesora”. Método: encuesta transversal, elaborada a partir de los resultados de revisiones e investigaciones propias que permitieron conocer la identidad de los distintos factores implicados en la evaluación de la doce…
Estrategias de aprendizaje en educación superior en un modelo curricular por competencias
2014
ResumenLas estrategias de aprendizaje utilizadas por los estudiantes afectan las metas de un modelo educativo; inciden en el tipo de aprendizaje que se pretende lograr. En el análisis sobre estas estrategias que utilizan los alumnos de las carreras de educación superior, cuyo modelo institucional está centrado en el estudiante con el enfoque por competencias, se encontró que la mitad de ellos se auxilian de tácticas acordes con este modelo como el ensayo, la elaboración, las metacognitivas, la autorreguladora, la autoevaluación y el apoyo afectivo; los demás combinan estrategias que conllevan a la memorización con las del aprendizaje significativo; las que menos utilizan son las de organiza…
Development and optimization of confirmatory liquid chromatography—Orbitrap mass spectrometry method for the determination of 17 anticoccidials in po…
2018
A new sensitive and selective multi-residue method based on liquid chromatography - Orbitrap high resolution mass spectrometry (LC-Orbitrap-HRMS) was developed and validated for the determination of 17 anticoccidials in poultry and eggs. Instrumental parameters were optimized by the means of statistical experimental designs to improve the sensitivity, precision, and repeatability of the method. Further optimization of auto-tuned MS parameters led to an increase of signal intensity by 10% to 99% for 16 out of 17 analytes. The sample preparation procedure included extraction from muscle tissue and egg samples with acetonitrile, followed by preconcentration, reconstitution, and filtration. Val…
Plaça de Les Glories Catalanes: relazioni a livello urbano
2006
Osservando una cartina o una foto aerea zenitale dell'area metropolitana di Barcellona si nota immediatamente un punto particolare, una sorta di cerniera ad est del Barri Gotic, punto di discontinuità tra la maglia regolare del Plan Cerdà (del 1859) e quella generata dal più recente sviluppo produttivo industriale, un punto di accumulazione delle tensioni generate dalle differenti evoluzioni urbane: questo punto è la Plaòa de Les Glories Catalanes
Erratum: An Inverse Backscatter Problem for Electric Impedance Tomography
2011
We fix an incorrect statement from our paper [M. Hanke, N. Hyvonen, and S. Reusswig, SIAM J. Math. Anal., 41 (2009), pp. 1948–1966] claiming that two different perfectly conducting inclusions necessarily have different backscatter in impedance tomography. We also present a counterexample to show that this kind of nonuniqueness does indeed occur.
Cryogenic 35GHz pulse ENDOR probehead accommodating large sample sizes: Performance and applications.
2009
The construction and performance of a cryogenic 35GHz pulse electron nuclear double resonance (ENDOR) probehead for large samples is presented. The resonator is based on a rectangular TE(102) cavity in which the radio frequency (rf) B(2)-field is generated by a two turn saddle ENDOR coil crossing the resonator along the sample axis with minimal distance to the sample tube. An rf power efficiency factor is used to define the B(2)-field strength per square-root of the transmitted rf power over the frequency range 2-180MHz. The distributions of the microwave B(1)- and E(1)-field, and the rf B(2)-field are investigated by electromagnetic field calculations. All dielectrics, the sample tube, and…
Preliminary application of thermoluminescence and single aliquot regeneration method for dose reconstruction in soda lime glass
2013
The research described in this paper shows that the use of the single aliquot regeneration (SAR) method for thermoluminescence (TL) measurements applied to soda lime glasses allows to carry out a retrospective dose evaluation. We have followed a fast and efficient sample preparation procedure which permits measurements without powdering and sieving processes. We have analyzed the TL signal of commercial soda lime watch glass irradiated with 6 Mega Volts (MV) LINAC photons, 10 MeV LINAC electrons and 62 MeV protons. After the initial exposure and following TL reading, the samples are successively irradiated with increasing doses of photons. Therefore, for each sample its calibration curve is…