Influence of regression model and incremental test protocol on the relationship between lactate threshold using the maximal-deviation method and performance in female runners

This study examined the influence of the regression model and initial intensity of an incremental test on the relationship between the lactate threshold estimated by the maximal-deviation method and the endurance performance. Sixteen non-competitive, recreational female runners performed a discontinuous incremental treadmill test. The initial speed was set at 7 km · h?1, and increased every 3 min by 1 km · h?1 with a 30-s rest between the stages used for earlobe capillary blood sample collection. Lactate-speed data were fitted by an exponential-plus-constant and a third-order polynomial equation. The lactate threshold was determined for both regression equations, using all the coordinates, excluding the first and excluding the first and second initial points. Mean speed of a 10-km road race was the performance index (3.04 ± 0.22 m · s?1). The exponentially-derived lactate threshold had a higher correlation (0.98 ≤ r ≤ 0.99) and smaller standard error of estimate (SEE) (0.04 ≤ SEE ≤ 0.05 m · s?1) with performance than the polynomially-derived equivalent (0.83 ≤ r ≤ 0.89; 0.10 ≤ SEE ≤ 0.13 m · s?1). The exponential lactate threshold was greater than the polynomial equivalent (P < 0.05). The results suggest that the exponential lactate threshold is a valid performance index that is independent of the initial intensity of the incremental test and better than the polynomial equivalent.     

Reading in pairs Network: a training model based on peer learning (pairs of teachers and school networks) for the sustainability of educational innovation / Red Leemos en pareja: un modelo de formación basado en el aprendizaje entre iguales (parejas de profesores y redes de centros) para la sostenibilidad de la innovación educativa

Abstract

This article presents a study on a Primary and Secondary Education teacher training network from Catalonia for the implementation of the Reading in pairs program. The goal is to describe, analyse, and assess the training model’s characteristics in relation to the learning promoted among participants, as well as the possibilities of actually incorporating educational innovation in the schools. The results suggest that this formative ecosystem permits a degree of learning and understanding of the program and its conceptual foundations that is relevant to the ability to implement it creatively and to adapt it to each school so that its sustainability is guaranteed.     

Equity in Education for/with Refugees and Migrants—Toward a Solidarity Promoting Interculturalism

This special issue brings to the forefront the complex educational challenges faced by migrants, refugees, and asylum seekers. It focuses on different ways of understanding equity in relation to education for/with refugees and migrants. The core articles gathered for the special issue originate from the Comparative Education Society in Europe (CESE) conference on the theme of “Equity in and Through Education” held in Glasgow, UK, between May 31 and June 3, 2016. Thus, the special issue addresses the question of equity in diverse local, national, and transnational contexts and from an interdisciplinary approach.     

Learning,using and exchanging global competence in the context of international postgraduate mobility

The paper offers a theoretically grounded analysis of international postgraduate students’ perspectives on the importance and development of global citizenship knowledge and competences while they are studying, and how these are valued and enacted afterwards. It draws on a series of interviews with non-Western international postgraduates during their studies in the UK and upon return to their home countries. It uses the concepts of social and cultural cosmopolitan competences as a framework to discuss the perceived benefits of educational mobility, and the possibilities and limits of social connectedness and openness in the internationalised university environment.     

A closer look at bilingual students’ use of multimodality in the context of an area comparison problem from a large-scale assessment

In this article, we use multimodality to examine how bilingual students interact with an area task from the National Assessment of Educational Progress in task-based interviews. Using vignettes, we demonstrate how some of these students manipulate the concrete materials, and use gestures, as a primary form of structuring their explanations and making mathematical meaning. We use our results as a basis to challenge the possible deficit perspective of bilingual students’ mathematical knowledge in current assessment practices. Choosing tasks that afford multiple modes of engagement and recognizing multimodal explanations in assessment practices has the potential to move us towards a better understanding of what bilingual students know and can do mathematically.     

Latent Class Modeling with A Time-To-Event Distal Outcome: A Comparison of One,Two and Three-Step Approaches

Latent class methods can be used to identify unobserved subgroups which differ in their observed data. Researchers are often interested in outcomes for the identified subgroups and in some disciplines time-to-event outcome measures are common, e.g., overall survival in oncology. In this study Monte Carlo simulation is used to evaluate the empirical properties of latent class effect estimates on a time-to-event distal outcome using one, two and three-step approaches. Both standard and inclusive bias-corrected three-step approaches are considered. One-step latent class effect estimates are shown to be superior to the evaluated alternatives. Both the two-step approach and a standard three-step approach, where subjects are partially assigned to latent classes, produced unbiased estimates with nominal confidence interval coverage when latent classes were well separated, but not otherwise.

     

Δ-distance: A family of dissimilarity metrics between images represented by multi-level feature vectors

This article presents the Δ-distance, a family of distances between images recursively decomposed into segments and represented by multi-level feature vectors. Such a structure is a quad, a quin or a nona-tree resulting from a fixed and arbitrary image partition or from an image segmentation process. It handles positional information of image features (e.g. color, texture or shape). Δ-distance is the generalized form of dissimilarity measures between multi-level feature vectors. Using different weights on tree nodes and different distances between nodes, distances between trees or visual similarity between images can be computed based on the general definition of Δ. In this article, we present three Δ-based distance families: two families of distances between tree structures, called -distance( for Tree) and -distance ( for Segment), and a family of visual distances between images, called ( for Visual). The -distance visually compares two images using their tree representation and the other two distances compare the tree structures resulting from image segmentation. Moreover, we show how existing distances between multi-level feature vectors appear to be particular cases of the Δ-distance     

Making IT work for municipalities: Building municipal wireless networks

The lack of widely available, affordable broadband Internet access has spurred a movement in which municipalities are rolling out wireless broadband networks. This movement has raised a number of questions including: Why are municipalities acting as the early adopters of wireless broadband technology? How does increased state regulation of municipal broadband networks affect this trend and how can cities respond? As cities use wireless broadband technology to enhance services to citizens, the growth of municipal wireless deployments has transitioned from linear to exponential. In response, many states have passed laws to regulate and restrict cities' ability to own, operate, deploy, or profit from either telecommunications or information services. Current and pending laws will be examined to understand how cities can deploy a wireless broadband network under these regulations. An analysis of municipal facilities and technology expertise illustrates the opportunity for public–private cooperation in wireless deployments. This paper will show that cooperation is beneficial in many cases. Finally, current business models will be examined for their ability to foster cooperation between the public and private sectors, bridge the digital divide, and create competition among private sector providers.     

Revisiting Bourdieu: alternative educational systems in the light of the theory of social and cultural reproduction

The paper reflects upon the principles and practice of an alternative educational system operating in rural Mexico in the light of Bourdieu’s theory of cultural and social reproduction. Bourdieu’s theory seeks to explain processes of reproduction of power relations within schools and society; whereas alternative educational systems seek to expand educational access in deprived areas in order to counteract processes of social inequality. The paper argues that, although Bourdieu’s theory does not fully explain the gradual inclusion of more people from disadvantaged backgrounds into education through alternative educational systems, processes of social reproduction in deprived communities still occur mainly because of lack of state support after primary school level, and a shortage of better infrastructure and opportunities for this sector of the population. Since the widespread upward educational and class mobility of the rural poor has not yet been achieved, the paper concludes that the processes of cultural and social reproduction continue despite the introduction of alternative educational systems.