Search results for "Processes"
showing 10 items of 3831 documents
Tectonic evolution of the southern Kaoko belt, Namibia
2002
Abstract The tectonic evolution at the junction of the Panafrican Kaoko and Damara belts is well recorded in the siliciclastic and carbonate successions of the Neoproterozoic Zerrissene turbidite system, metamorphosed to the biotite zone of the greenschist facies. The structures in the turbidites are attributed to two main deformational events. The older one generated two continuous folding phases, D1 and D2, and the younger one resulted in D3 deformation. D1, of dominant E–W shortening, caused upright kilometre-scale folds with well-developed axial planar cleavage, N–S trending axial planes and subhorizontal axes. This phase graded into D2 that refolded the first folds coaxialy and develop…
A new expression of the slope length factor to apply USLE-MM at Sparacia experimental area (Southern Italy)
2013
Abstract Predicting soil loss due to water erosion by empirical models is useful to assess the severity of the phenomenon in an area of interest and to predict the effect of alternative soil erosion control practices. The USLE scheme cannot be used at the Sparacia experimental area (Sicily, South Italy) to predict event soil loss per unit plot area, Ae, because experimental data suggest that, generally, Ae does not increase with plot length, λ. The USLE-MM scheme uses the runoff coefficient, QR, as an additional independent variable in order to develop an empirical model allowing prediction of storm soil loss values that do not necessarily increase with λ. According to this model, Ae is exp…
Advances in designing drip irrigation laterals
2018
It is known that using paired laterals, in which two distribution pipes extend in opposite directions from a common manifold, contribute to increasing water use efficiency (WUE). Recently, an analytical procedure to optimally design paired drip laterals on uniform slopes was proposed. More recently, this design procedure was simplified by deriving simple explicit relationships, as a function of 16 calibration constants, with relative errors that were less than 2%. In this paper, further simple design relationships are derived that require only 3 calibration constants, thus more readily obtainable results are produced and the influence of the flow rate and diameter exponents of resistance eq…
Anxiety and Covert Changes of Attention Control
1986
Publisher Summary This chapter presents a research paradigm, which allows the study of covert attentional processes in threatening situations and explores their relationship to the subjective experience of anxiety. These processes mediate changes of attention control beyond awareness by influencing the selective organization of behavior. The contingent negative variation (CNV) is a surface-negative slow potential that arises in the interstimulus interval of a forewarned reaction time task, where a warning signal (S1) precedes an imperative stimulus (S2), to which an overt motor response is required. If the interstimulus interval is shorter than approximately 3 seconds, CNV appears as a cont…
Social cognition theories and behavior change in COVID-19: A conceptual review.
2022
The COVID-19 pandemic has had unprecedented health, economic, and social consequences worldwide. Although contact reductions and wearing face coverings have reduced infection rates, and vaccines have reduced illness severity, emergence of new variants of the coronavirus that causes COVID-19, and the shift from pandemic to endemic patterns of infection, highlights the importance of ongoing preventive behavior adherence to manage future outbreaks. Research applying social cognition theories may assist in explaining variance in these behaviors and inform the development of efficacious behavior change interventions to promote adherence. In the present article, we summarize research applying the…
Language and Symbolic Play in Toddlers
1997
Language-play relations were examined in 110 18-month-old toddlers by observing their play actions in the Symbolic Play Test and assessing their language skills with the CDI parental report and the Reynell Developmental Language Scales. Significant associations between both language comprehension and production (vocabulary, use of suffixes, utterance length) and play were found when percentage of symbolic play was used as the measure of play competence. The total play score which included both functional-relational toy manipulation and symbolic play was not as strongly associated with the language measures. In both play measures relations were, however, higher between play and language com…
Parenting dimensions in relation to pre-schoolers’ behaviour problems in Latvia and Lithuania
2014
The aim of the present study was to examine associations between parenting and child behaviour problems in two neighbouring countries with subtle, yet apparent cultural differences. Participants were mothers and fathers of preschool-age children from Latvia and Lithuania. Parents completed a measure of child-rearing attitudes and reported on their child’s internalizing and externalizing behaviours. In both countries, parental warmth was negatively associated with child behaviour problems, and punishment orientation was positively associated. There were differences by country in the association of paternal psychological control and behaviour problems, and in the interactions of parenting di…
Cross-lagged relations between task-avoidant behavior and literacy skills in Chinese
2013
Abstract We examined the cross-lagged relations between children's task-avoidant behavior and their performance in reading and spelling in Chinese. Eighty Grade 2 and 103 Grade 4 Mandarin-speaking Taiwanese children were assessed on measures of nonverbal IQ, task value, reading accuracy, fluency, and spelling. A year later, the children were reassessed on the literacy tasks. The teachers also assessed the children's task-avoidant behavior at both testing times. The results indicated that task-avoidant behavior was a significant predictor of spelling and to a lesser extent of reading accuracy, even after controlling for the effects of the previous level of literacy skill, nonverbal IQ, and t…
Development of math anxiety and its longitudinal relationships with arithmetic achievement among primary school children
2019
Abstract The aim of this study is to examine the development of two separable aspects of math anxiety, anxiety about math-related situations and anxiety about failure in math, and their cross-lagged relationship with arithmetic achievement. The mean level of anxiety about math-related situations decreased among second, third, and fourth graders, and the level of anxiety about failure in math declined among third, fourth, and fifth graders. The rank-order of individuals was more stable in arithmetic achievement than in either aspect of math anxiety. Arithmetic achievement predicted later anxiety about failure in math, but neither aspect of math anxiety predicted later achievement. The result…
Parents' work burnout and adolescents' school burnout: Are they shared?
2011
There is considerable evidence that psychological distress not only has consequences for those who experience it but also can create problems for other members of the distressed person's family. To examine whether parents' work burnout and their children's school burnout are shared in the family, 515 adolescents (median age = 15) completed scales for school burnout and 595 of their parents (342 mothers, 253 fathers) completed scales for work burnout and their economic situation. The intraclass correlations showed that parents' work burnout and adolescents' school burnout was shared in the family. In addition, the better the economic situation the parents' experienced, the lower was the leve…