Articulating the signs of danger: lay experiences of post-Chernobyl radiation risks and effects   总被引：1，自引：0，他引：1  

Kuchinskaya O 《Public understanding of science (Bristol, England)》2011,20(3):405-421

This essay examines lay experiences of radiation--the hazard imperceptible with unaided senses--and how these experiences are shaped. Analysis is conducted on the basis of participant observation and interviews in Belarusian rural areas affected after the 1986 Chernobyl nuclear accident. I argue that radiation risks and health effects are not always obvious or immediately observable for those experiencing them, and they should be articulated. The paper compares various opportunities for articulation, including the context of radiological testing and administrative contexts, and describes the kinds of articulations they make possible. I conclude that limited opportunities for articulation result in limited lay recognition of radioactive contamination and their own health effects. The analysis implies that affected lay populations cannot always be assumed to be the most risk-conscious and hold special knowledge about radiation effects independently of scientific and administrative definitions of it.  相似文献   

A card game for designing activities for technology-enhanced learning in higher education     

Mavroudi  Anna  Almeida  Teresa  Frennert  Susanne  Laaksolahti  Jarmo  Viberg  Olga 《Education and Information Technologies》2022,27(2):2367-2383

Education and Information Technologies - The importance of providing mechanisms and tools that effectively support the transition from implicit to explicit representations of Learning Design has...  相似文献   

Modelling the dynamics of children’s gross motor coordination     

Ana Carolina Reyes  Raquel Chaves  Adam D G Baxter-Jones  Olga Vasconcelos  Lisa M Barnett  Go Tani 《Journal of sports sciences》2013,31(19):2243-2252

ABSTRACT

This study modelled children’s gross motor coordination, investigated sex-differences and identified the effects of fixed and dynamic correlates on motor coordination development. A total of 344 Portuguese children (170 girls), from 6 age cohorts (5 to 9 years of age), were followed consecutively for three years (age range 5 to 11 years) using a mixed-longitudinal cohort design. Birth weight, hand dominance and socioeconomic status (SES) were identified. Gross motor coordination, body mass index, physical fitness (PF) and physical activity (PA) were assessed annually. A sequence of multilevel hierarchical linear models were developed. Model 1 found that age, age², sex, sex-by-age and sex-by-age² were significant predictors (p < 0.05) of gross motor coordination. Boys outperformed girls from 6 years of age onwards. Model 2 found a cohort effect (p < 0.05). Model 3 found that right handers were more coordinated (p < 0.05). When the confounders of body mass index, PF and PA were added to the model (Model 4) it was found that boys and girls had parallel trajectories in their gross motor coordination development. In conclusion children with increasing body mass index were less coordinated, while those who were stronger and more agile had steeper trajectories of gross motor coordination with age.  相似文献   

Historical coastal urban landscapes digital documentation and temporal study with 2D/3D modeling functionality: The case of Thessaloniki,Greece     

Olga Georgoula  Anastasios Stamnas  Petros Patias  Charalampos Georgiadis  Vassiliki Fragkoulidou 《Journal of Cultural Heritage》2013,14(5):396-402

The study refers to the visual representation of the coastal front of the historical center of Thessaloniki in northern Greece and its changes that have occurred through the years. Most of the old town was destroyed by fire on August 18, 1917. A few years later, the French architect and archeologist Ernest Hébrard proposed the reconstruction of the city centre, but his plans were never fully implemented. Since then, a series of interventions changed the form of the old town and consequently the coastal cityscape. The research was initially based on the photogrammetric processing of archive aerial images (1938) of Thessaloniki's city centre. Besides the vertical images, high oblique aerial images dated back to 1932, proved to be a significant source of information. A rich archive of old photographic material, sketches, drawings and gravures of the coastal forehead of the city was also used. Ortho-images of the coastal front, derived from laser scanning (2010), and a 3D model of the historical city center, derived from the stereo photogrammetric process of aerial images (1990), contributed decisively at the multi temporal study of the city front. The main outcomes of the present documentation study are the 3D representation (at scale of 1:200, accuracy 5 cm) of temporal changes of a part of the coastal front of the historical center of Thessaloniki and the 2D representation (at scale 1:100, accuracy 1–2 cm) of these changes with respect to variations on skyline, lacunas, interventions in old buildings, etc.  相似文献   

Faculty pedagogical developers as enablers of technology enhanced learning     

Olga Viberg  Olle Bälter  Björn Hedin  Emma Riese  Anna Mavroudi 《British journal of educational technology : journal of the Council for Educational Technology》2019,50(5):2637-2650

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Academics' social media use over time is associated with individual,relational, cultural and political factors     

George Veletsianos  Nicole Johnson  Olga Belikov 《British journal of educational technology : journal of the Council for Educational Technology》2019,50(4):1713-1728

The use of social media in academics' lives is well documented; however, researchers have a limited understanding about whether, why and how academics' social media use changes over time. Through interviews with 12 scholars, we identify multiple reasons that lead them to change their use of social media over time. Specifically, scholars report their social media use changing as a result of personal life events; professional transitions; concerns related to online privacy and self-protection; evolution of technology; their desire to develop and nurture relationships; awareness of the needs of others; and, the political climate. These findings reflect individual desires and broader cultural shifts, indicating that scholars’ use of social media is impacted not just by their individual preferences, but also by forces that impact upon them.  相似文献   

A domain-independent approach to finding related entities     

Olga Vechtomova  Stephen E. Robertson 《Information processing & management》2012

We propose an approach to the retrieval of entities that have a specific relationship with the entity given in a query. Our research goal is to investigate whether related entity finding problem can be addressed by combining a measure of relatedness of candidate answer entities to the query, and likelihood that the candidate answer entity belongs to the target entity category specified in the query. An initial list of candidate entities, extracted from top ranked documents retrieved for the query, is refined using a number of statistical and linguistic methods. The proposed method extracts the category of the target entity from the query, identifies instances of this category as seed entities, and computes similarity between candidate and seed entities. The evaluation was conducted on the Related Entity Finding task of the Entity Track of TREC 2010, as well as the QA list questions from TREC 2005 and 2006. Evaluation results demonstrate that the proposed methods are effective in finding related entities.  相似文献   

Electroencephalogram and Heart Rate Regulation to Familiar and Unfamiliar People in Children With Autism Spectrum Disorders     

Amy Vaughan Van Hecke  Jocelyn Lebow  Elgiz Bal  Damon Lamb  Emily Harden  Alexis Kramer  John Denver  Olga Bazhenova  Stephen W. Porges 《Child development》2009,80(4):1118-1133

Few studies have examined whether familiarity of partner affects social responses in children with autism. This study investigated heart rate regulation (respiratory sinus arrhythmia [RSA]: The myelinated vagus nerve's regulation of heart rate) and temporal–parietal electroencephalogram (EEG) activity while nineteen 8- to 12-year-old children with autism and 14 controls viewed videos of a familiar and an unfamiliar person reading a story. Children with autism had lower overall RSA levels and exhibited decreased RSA to the unfamiliar person, versus control children. Both groups decreased temporal–parietal EEG activity to the unfamiliar person. Higher RSA was related to higher social skill ratings and fewer problem behaviors. Thus, the social difficulties of children with autism may be characterized by specific mobilization to unfamiliar people.  相似文献   

Student gender stereotypes: contrasting the perceived maleness and femaleness of mathematics and language     

Isabelle Plante  Manon Théorêt  Olga Eizner Favreau 《教育心理学》2009,29(4):385-405

The purpose of this study was to evaluate the gender stereotypes endorsed by elementary and high school students regarding mathematics and language. We developed a questionnaire allowing students to rate mathematics and language as either male or female domains and administered it to a sample of 984 elementary and high school French‐speaking Canadian students (Grades 6, 8, and 10). Results showed that, with the exception of Grade 6 boys, students did not believe that mathematics was a male domain, or even conceived of mathematics as a predominantly female domain, suggesting that the traditional stereotype favouring boys in mathematics might have changed over the past few years. Moreover, language was clearly viewed as a female domain. Overall, our findings suggest that boys seem to be in need of encouragement in school, especially regarding language, where the advantage given to girls is particularly salient.  相似文献   

A practical illustration of multidimensional diagnostic skills profiling: Comparing results from confirmatory factor analysis and diagnostic classification models     

Olga Kunina-Habenicht  André A. Rupp  Oliver Wilhelm 《Studies in Educational Evaluation》2009,35(2-3):64-70

In recent years there has been an increasing international interest in fine-grained diagnostic inferences on multiple skills for formative purposes. A successful provision of such inferences that support meaningful instructional decision-making requires (a) careful diagnostic assessment design coupled with (b) empirical support for the structure of the assessment grounded in multidimensional scaling models. This paper investigates the degree to which multidimensional skills profiles of children can be reliably estimated with confirmatory factor analysis models, which result in continuous skill profiles, and diagnostic classification models, which result in discrete skill profiles. The data come from a newly developed diagnostic assessment of arithmetic skills in elementary school that was specifically designed to tap multiple skills at different levels of definitional grain size.  相似文献