1,281 research outputs found
Dynamical resonant structures in meteoroid stream orbits
ABSTRACT Herein we use the Canadian Meteor Orbit Radar (CMOR) data set to search for evidence of a resonant swarm in the Taurid meteoroid stream at the 7:2 Jovian resonance. We use a numerical method to estimate the reduction in radar orbit measurement uncertainty required to detect this feature in a data set. This is highly dependent on the proportion of observed particles that are members of the resonant swarm. However, we find that a meteor radar with uncertainties a factor of 10 lower than those of the current CMOR will be sufficient for detection to be possible, if the meteor shower consists of more than 5 per cent resonant particles (considered likely given the results of visual meteor studies). Such an improvement will require accurate removal of deceleration errors from pre-atmospheric meteor velocities, and improvement to the robustness of echo inflection point identification algorithms and interferometric measurements
Literacy practices of primary education children in Andalusia (Spain): a family-based perspective
Primary school children develop literacy practices in various domains and situations in everyday life.
This study focused on the analysis of literacy practices of children aged 8â12 years from the perspec-
tive of their families. 1,843 families participated in the non-experimental explanatory study. The
children in these families speak Spanish as a first language and are schooled in this language. The
instrument used was a self-report questionnaire about childrenâs home-literacy practices. The data
obtained were analysed using categorical principal components analysis (CATPCA) and analysis of
variance (ANOVA). The results show the complex relationship between literacy practices developed
by children in the domains of home and school and the limited development of a literacy-promoting
âthird spaceâ. In conclusion, the families in our study had limited awareness of their role as literacy-
promoting agents and thought of literacy learning as restricted to formal or academic spaces
âI will not be thrown out of the country because Iâm an immigrantâ: Eastern European migrantsâ responses to hate crime in a semi-rural context in the wake of Brexit
This article examines Eastern European migrantsâ experiences of and responses to hate crime. Following the UK European Union Membership Referendum (âBrexitâ vote), there was an increase in reported hate crimes against immigrants. The study focuses on the experiences of migrants in Lincolnshire, a region of England which has a significant migrant population, and which had one of the highest âleaveâ votes. The focus on white migrants in this semi-rural setting offers an original perspective in the field of hate crime studies. We draw on semi-structured interviews and observations to identify temporal, spatial, and relational factors in responses to hate crime. We uncover the insecure occupation of a âthird spaceâ constituted by material, discursive, and emotional practices. This positioning was destabilised post referendum; but there was also evidence of the operation of agency within processes of âotheringâ, suggesting a transition from victim identity to emergent political subject
âI will not be thrown out of the country because Iâm an immigrantâ: Eastern European migrantsâ responses to hate crime in a semi-rural context in the wake of Brexit
This article examines Eastern European migrantsâ experiences of and responses to hate crime. Following the UK European Union Membership Referendum (âBrexitâ vote), there was an increase in reported hate crimes against immigrants. The study focuses on the experiences of migrants in Lincolnshire, a region of England which has a significant migrant population, and which had one of the highest âleaveâ votes. The focus on white migrants in this semi-rural setting offers an original perspective in the field of hate crime studies. We draw on semi-structured interviews and observations to identify temporal, spatial, and relational factors in responses to hate crime. We uncover the insecure occupation of a âthird spaceâ constituted by material, discursive, and emotional practices. This positioning was destabilised post referendum; but there was also evidence of the operation of agency within processes of âotheringâ, suggesting a transition from victim identity to emergent political subject
Affinities and Beyond! Developing Ways of Seeing in Online Spaces
This article presents an insider view of an online community of adults involved in sharing digital photography through a host website, Flickr. It describes how reciprocal teaching and learning partnerships in a dynamic multimodal environment are achieved through the creation of a âThird Spaceâ or âAffinity Spaceâ, where âFunds of Knowledgeâ are shared and processed in such a way that new meanings and discourses are generated. It is argued that this process is evidence of valuable learning and of the deepening of global understandings within the local space of Flickr. The new understandings are at least partly identifiable on the Flickr space, through the co-constructed âfolksonomyâ or âonline taxonomyâ of ways of looking at the world. Further, the article provides evidence for broadening existing definitions of literacy, at a time when the visual mode increasingly works interactively with verbal cues and explanations
Highgate Cemetery heterotopia: A Creative Counterpublic Space
Highgate Cemetery is nominally presented as a heterotopia, constructed, and theorized through the articulation of three âspaces.â First, it is configured as a public space which organizes the individual and the social, where the management of death creates a relationship between external space and its internal conceptualization. This reveals, enables, and disturbs the sociocultural and political imagination which helps order and disrupt thinking. Second, it is conceived as a creative space where cemetery texts emplace and materialize memory that mirrors the cultural capital of those interred, part of an urban aesthetic which articulates the distinction of the metropolitan elite. Last, it is a celebritized counterpublic space that expresses dissent, testimony to those who have actively imagined a better world, which is epitomized by the Marx Memorial. Representation of the cemetery is ambiguous as it is recuperated and framed by the living with the three different âspacesâ offering heterotopic alliances
Investigating pupilsâ interactions around digital texts: a spatial perspective on the âclassroom-nessâ of digital literacy practices in schools
This paper complements debates around use of new technologies and literacy in education by proposing a focus on âclassroom-ness.â It highlights the significance of incidental, everyday and ephemeral practices associated with classroom technology-use. Using examples from a study of primary pupilsâ interactions around digital texts, it argues that we must acknowledge the distinctiveness of technology-use in classroom contexts but also see the spaces associated with those contexts as continually constructed, relational and heterogeneous. This helps us look beyond binary distinctions â between in/out of school and global/local practices, on/off-screen and on/offline activity, material/virtual contexts and official/unofficial discourses â to recognise the complex and nuanced ways that children make meaning around new technologies. It is proposed that this theoretical lens â in recognising the complexity of classroom-ness â can help us better understand the barriers and opportunities associated with effective integration of new technologies in educational contexts
Report of the IAU/IAG Joint Working Group on Theory of Earth Rotation and Validation
This report focuses on some selected scientific outcomes of the activities developed by the IAU/IAG Joint Working Group on Theory of Earth rotation and validation along the term 2015â2019. It is based on its end-of-term report to the IAG Commission 3 published in the Travaux de lâIAG 2015â2019, which in its turn updates previous reports to the IAG and IAU, particularly the triennial report 2015â2018 to the IAU Commission A2, and the medium term report to the IAG Commission 3 (2015â2017). The content of the report has served as a basis for the IAG General Assembly to adopt Resolution 5 on Improvement of Earth rotation theories and models.JMF, AE, and JG were partially supported by Spanish Project AYA2016-79775-P (AEI/FEDER, UE). The work of RSG described in this paper was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Support for that work was provided by the Earth Surface and Interior Focus Area of NASAâs Science Mission Directorate
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