Exploiting structural information for semi-structured document categorization

This paper examines several different approaches to exploiting structural information in semi-structured document categorization. The methods under consideration are designed for categorization of documents consisting of a collection of fields, or arbitrary tree-structured documents that can be adequately modeled with such a flat structure. The approaches range from trivial modifications of text modeling to more elaborate schemes, specifically tailored to structured documents. We combine these methods with three different text classification algorithms and evaluate their performance on four standard datasets containing different types of semi-structured documents. The best results were obtained with stacking, an approach in which predictions based on different structural components are combined by a meta classifier. A further improvement of this method is achieved by including the flat text model in the final prediction.     

Supervised sentiment analysis in Czech social media

This article describes in-depth research on machine learning methods for sentiment analysis of Czech social media. Whereas in English, Chinese, or Spanish this field has a long history and evaluation datasets for various domains are widely available, in the case of the Czech language no systematic research has yet been conducted. We tackle this issue and establish a common ground for further research by providing a large human-annotated Czech social media corpus. Furthermore, we evaluate state-of-the-art supervised machine learning methods for sentiment analysis. We explore different pre-processing techniques and employ various features and classifiers. We also experiment with five different feature selection algorithms and investigate the influence of named entity recognition and preprocessing on sentiment classification performance. Moreover, in addition to our newly created social media dataset, we also report results for other popular domains, such as movie and product reviews. We believe that this article will not only extend the current sentiment analysis research to another family of languages, but will also encourage competition, potentially leading to the production of high-end commercial solutions.     

Embracing equity and excellence while constructing science teacher identities in urban schools: Voices of new Teachers of Color

We explored how new Teachers of Color grappled with equity and excellence as they were constructing science teacher identities while learning to teach in a teacher education program committed to equity, justice, and excellence, and eventually teaching in urban schools where inequities and injustices persist. The theoretical framing, compiled from various bodies of literature, weaved together what we consider as essential parts of teacher identity construction and provided a lens with which to examine how conceptions of equity and excellence that the study participants were constructing meshed with their multiple identities, considerations on legitimate knowledge production, and dialectical relationships with which they grappled. Using transcendental phenomenology, we learned from and with three Black and Latinx teachers and their narratives. The teachers intertwined similarly and differently their evolving conceptions of equity and excellence into their evolving science teacher identities as they engaged in forms of contentious local practice and reflected on their experiences as science Teachers of Color teaching predominately Students of Color. Their multiple identities were meshed with histories of larger institutions—science, schooling, and society—and together these were shaping their conceptions of equity and excellence. The intermingling of equity and excellence, which was guiding the curricular and instructional decisions they were making in their classrooms, was also linked to what they considered as legitimate knowledge production in science classes and what counted as knowledge that their students needed to know at different times. The various dilemmas defined by opposing poles with which they were grappling also functioned as scales on which their coordinated equity-excellence unit of meaning was forming. Based on the study, we offer insights into practices that science teacher educators may consider as they prepare new teachers, and work with practicing teachers, to embrace and coordinate equity and excellence in their ever-developing science teacher identities.     

Inclusive education in the Czech Republic: A scoping review of a paradigm shift

This scoping review presents the historical, social, and international influences that shaped the gradual move from segregated to inclusive education for all children in the Czech Republic. The introduction of the 2016 amendment to the Education Act marked a decisive paradigm shift in education policy, which formed the legal basis for services and support measures to be made available for all children with special needs in local mainstream schools. We analysed Czech language and English language peer-reviewed specialist literature to see how these changes have been reflected in current education research. The eighteen studies reviewed provide a complex picture of facilitators and barriers at the level of inclusive culture, policy and practice. Even though progress towards inclusive education in the Czech Republic has been notable, there are still systemic and attitudinal barriers to the education of all children.     

Induction and Early-career Support of Teachers in Europe

The deep economic, social, technological and cultural changes in Europe represent a real challenge for teacher education. The teacher's role is becoming more complex and demanding, while the expectations of society are rising. Teachers are expected not only to enable optimal development of increasingly heterogeneous groups of pupils, but also to mitigate the effects of social inequality. All this requires qualitative changes in pre-service and in-service teacher education. In this regard, the transition from school/university to professional life — the induction period and early career years — requires special attention. In this phase, a fruitful synthesis of theory and practice can occur if novices are systematically introduced and supported by good mentoring in the transition from study to school life and culture, but a ‘practice shock’ is also possible during which many positive effects of pre-service education are lost. Our aim is to identify some principles and optimal solutions that would foster teacher's professional development in this important phase of their career.     

Development of Art Appreciation in 11–14 year‐old Students

Modern art curricula derive from the assumption that visual arts education can be of a high quality only if productive and receptive artistic activities are implemented. In art education practice, we are able to follow incentives for artistic expression but pay less attention to developing art appreciation that is based on developing as subtle perceptions of artwork as possible. Students have few opportunities to observe, enjoy and understand artwork. This discussion presents the results of a study that monitored the development of art appreciation abilities of 11–14 year‐old students in Slovenian compulsory education. The level of art appreciation abilities is rather average and more developed with older students and girls. There were no statistically significant differences with regard to school stratum.     

League tables in educational evidence-based policy-making: can we stop the horse race,please?

International large-scale student assessments (ILSAs) in education represent a valuable source of information for policy-makers, not only on student achievements, but also on their relationship with different contextual factors. The results are partly described in the official studies’ reports; more can be derived from the publicly released data sets. However, league tables are often the only evidence used in policy debates and decisions on education. Indeed, the comparison of student achievement across the participating educational systems is a legitimate proxy for estimating countries’ development and productivity, but the use of league tables more often turns into ‘horse-ranking’, ignoring the contexts of teaching and learning. This is often supported by the media, turning the use of results into their abuse. The purpose of this paper is to discuss the use and misuse of league tables in reporting ILSA results, vs. the use of data for in-depth analysis in order to make informed decisions.     

Analysis of muscular activity and dynamic response of the lower limb adding vibration to cycling

Vibration in cycling has been proved to have undesirable effects over health, comfort and performance of the rider. In this study, 15 participants performed eight 6-min sub-maximal pedalling exercises at a constant power output (150W) and pedalling cadence (80 RPM) being exposed to vibration at different frequencies (20, 30, 40, 50, 60, 70 Hz) or without vibration. Oxygen uptake (VO2), heart rate (HR), surface EMG activity of seven lower limb muscles (GMax, RF, BF, VM, GAS, SOL and TA) and 3-dimentional accelerations at ankle, knee and hip were measured during the exercises. To analyse the dynamic response, the influence of the pedalling movement was taken into account. The results show that there was not significant influence of vibrations on HR and VO2 during this pedalling exercise. However, muscular activity presents a significant increase with the presence of vibration that is influenced by the frequency, but this increase was very low (< 1%). Also, the dynamic response shows an influence of the frequency as well as an influence of the different parts of the pedalling cycle. Those results help to explain the effects of vibration on the human body and the influence of the rider/bike interaction in those effects.     

A leap to the digital era—what are lower and upper secondary school students’ experiences of distance education during the COVID-19 pandemic in Serbia?

European Journal of Psychology of Education - The aim of this paper is to thoroughly examine how students in Serbia experienced their education through distance learning during the 2020 Spring...