Search results for "Variable"
showing 10 items of 1674 documents
Interpolative mapping of mean precipitation in the Baltic countries by using landscape characteristics
2011
Maps of the long-term mean precipitation involving local landscape variables were generated for the Baltic countries, and the effectiveness of seven modelling methods was compared. The precipitation data were recorded in 245 meteorological stations in 1966–2005, and 51 location-related explanatory variables were used. The similarity-based reasoning in the Constud software system outperformed other methods according to the validation fit, except for spring. The multivariate adaptive regression splines (MARS) was another effective method on average. The inclusion of landscape variables, compared to reverse distance-weighted interpolation, highlights the effect of uplands, larger water bodies …
Colegialidad docente: un estudio comparativo (España/México) de validación de constructo para el diseño de un instrumento de evaluación
2014
En Bakieva (2011) y Bakieva, Jornet y Carmona (2012) se aportan las bases teóricas y una primera validación de constructo realizada en España para el desarrollo de un instrumento de evaluación de colegialidad docente en Educación Primaria y Secundaria. Aquí presentamos un segundo análisis comparativo de los juicios de dos grupos de profesorado de España y México, que han valorado las dimensiones que componen la Colegialidad Docente. Finalmente, identificamos tres dimensiones de Colegialidad Docente: Satisfacción Laboral, como percepción de lo que “recibe” el sujeto en esa institución, Clima Institucional, como percepción exterior de lo que se vive en la institucional, y Compromiso Instituci…
Un esquema de codificación para el análisis de las resoluciones de los problemas de probabilidad condicional
2016
En este trabajo proponemos un esquema de variables para el análisis de las resoluciones de los problemas de probabilidad condicional. Se consideran tres variables principales: las variables del enfoque, del proceso y del producto o resultado, las cuales describen aquello que el resolutor hace desde que lee el enunciado del problema hasta que produce un resultado. Estas tres variables principales pueden ser explicadas por medio de no menos de 15 variables secundarias, la mayoría de ellas dicotómicas.
What can the discursive construction of stance and engagement voices in traveler forums and tourism promotional websites bring to a cultural, cross-g…
2016
This paper suggests that interpersonality as a framework for analysis is always necessarily conditioned by contextual variables. Genre and discipline, together with language and culture, challenge the initial model of metadiscourse (Vande Kopple, 1985; Crismore et al., 1993) as well as other approaches to interpersonal metadiscourse (Hyland & Tse, 2004; Hyland, 2005) that take English and academic discourse as their main referents. A model of interpersonality should be understood as containing variables, in order to cater for more insightful and accurate analyses. It is argued that stance and engagement voices (author and reader) (White 2003; Hyland, 2008), as construed in non-academic genr…
All-Possible-Couplings Approach to Measuring Probabilistic Context.
2013
From behavioral sciences to biology to quantum mechanics, one encounters situations where (i) a system outputs several random variables in response to several inputs, (ii) for each of these responses only some of the inputs may "directly" influence them, but (iii) other inputs provide a "context" for this response by influencing its probabilistic relations to other responses. These contextual influences are very different, say, in classical kinetic theory and in the entanglement paradigm of quantum mechanics, which are traditionally interpreted as representing different forms of physical determinism. One can mathematically construct systems with other types of contextuality, whether or not …
Suppression and mediation effect in psychosocial intervention: differences, similarities and examples
2013
El presente trabajo compara el efecto mediador y el supresor de una tercera variable. Ambos efectos parcelan la varianza de la variable dependiente (Y). La mediación es la reducción, tras introducir una tercera variable (Z) en el modelo, de la proporción de varianza explicada directamente por la variable independiente (X) en la variable criterio (Y) y la supresión es el incremento de la proporción de varianza explicada directamente por la independiente en la variable criterio, al incluir la tercera variable en el modelo. Se analizan las características y diferencias de cada efecto y se examina en qué situaciones se produce uno u otro. Cada situación, compuesta de tres variables correlaciona…
Estrategias de afrontamiento en adultos mayores en función de variables sociodemográficas (Coping strategies in older adults as a function of sociode…
2015
Coping strategies are used to adapt to the changes that occur during aging. This study investigated 275 older adults who attended a senior citizen’s centre. They provided sociodemographic data and answered the Stress Coping Questionnaire (SCQ) in a semistructured interview. The aim was to analyse the use of coping strategies based in several sociodemographic variables, using correlations, t tests, and ANOVAs. The results showed a positive and significant association between age and religion, and differences were found in gender, marital status, educational attainment, and income level. In conclusion, as age increases, religion is most commonly used coping strategy; women make greater use of…
Temperature effects explain continental scale distribution of cyanobacterial toxins
2018
Insight into how environmental change determines the production and distribution of cyanobacterial toxins is necessary for risk assessment. Management guidelines currently focus on hepatotoxins (microcystins). Increasing attention is given to other classes, such as neurotoxins (e.g., anatoxin-a) and cytotoxins (e.g., cylindrospermopsin) due to their potency. Most studies examine the relationship between individual toxin variants and environmental factors, such as nutrients, temperature and light. In summer 2015, we collected samples across Europe to investigate the effect of nutrient and temperature gradients on the variability of toxin production at a continental scale. Direct and indirect…
Mappings of finite distortion : boundary extensions in uniform domains
2015
In this paper, we consider mappings on uniform domains with exponentially integrable distortion whose Jacobian determinants are integrable. We show that such mappings can be extended to the boundary and moreover these extensions are exponentially integrable with quantitative bounds. This extends previous results of Chang and Marshall on analytic functions, Poggi-Corradini and Rajala and Akkinen and Rajala on mappings of bounded and finite distortion.
Calculating the implied correlation matrix for a Path Analysis model
2014
To overcome the limitations of two existing methods for calculating a Path Analysis implied correlation matrix, this paper presents an alternative method for calculating this matrix. This new method is based on a recurrence principle which is easy and quick to implement. This method is also operational regardless of the number of variables. The consequences of this result with the estimation or testing stages will be illustrated on the basis of examples.