963 research outputs found
Collaborative Epistemic Discourse in Classroom Information Seeking Tasks
We discuss the relationship between information seeking, and epistemic beliefs â beliefs about the source, structure, complexity, and stability of knowledge â in the context of collaborative information seeking discourses. We further suggest that both information seeking, and epistemic cognition research agendas have suffered from a lack of attention to how information seeking as a collaborative activity is mediated by talk between partners â an area we seek to address in this paper. A small-scale observational study using sociocultural discourse analysis was conducted with eight eleven year old pupils who carried out search engine tasks in small groups. Qualitative and quantitative analysis were performed on their discussions using sociocultural discourse analytic techniques. Extracts of the dialogue are reported, informed by concordance analysis and quantitative coding of dialogue duration. We find that 1) discourse which could be characterised as âepistemicâ is identifiable in student talk, 2) that it is possible to identify talk which is more or less productive, and 3) that epistemic talk is associated with positive learning outcomes
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Distribution of Benthic Macroinvertebrates Beaumont Port Arthur Area
On March 1, 1976, the Bureau of Economic Geology initiated an extensive program of benthic sampling in the State submerged lands (McGowen and Morton, 1979). The state-owned submerged lands of Texas cover nearly 6,000 square miles (15,540 km2) and extend from Mexico to Louisiana. This area includes bays, estuaries, lagoons, and the inner continental shelf located 10.3 miles (16.6 km) seaward of the Gulf shoreline (see fig. 1). Benthic samples were collected at 1-mile (1.6-km) intervals. By January 1978, a total of 6,697 samples had been collected. Sample analysis encompassed textural studies (grain size properties), geochemistry (trace elements and total organic carbon), and biological studies.
This report focuses on the biology of the submerged lands in the Beaumont-Port Arthur area and provides preliminary information on benthic macroinvertebrate assemblages and diversity. It serves as a baseline inventory of biological data necessary to predict and assess potential problems and environmental impacts related to energy production, food production, recreation, and transportation.Bureau of Economic Geolog
Discussing ethical issues in school science: An investigation into the opportunities to practise and develop arguments offered by online and face-to-face discussions
Solar Cycle Variations In The Electron Heat Flux: Ulysses Observations
Solar wind observations by the Ulysses spacecraft now include nearly ten years of continuous ion and electron measurements. In this study, we report detailed measurements of the electron heat flux in the solar wind. In particular, we examine the heat flux measurements for long-term correlations with wave activity and solar wind speed. We find that the average heat flux, when scaled by R2,9to account for variations due to distance from the Sun, is constant and independent of heliographic latitude or solar cycle. We find that during both solar maximum and solar minimum, there is no significant correlation between the magnitude of the electron heat flux and the solar wind speed. Comparison of the electron heat flux data with wave activity indicates that the whistler heat flux instability does not play an important role in limiting the solar wind heat flux
Shank Modulates Postsynaptic Wnt Signaling to Regulate Synaptic Development
Prosap/Shank scaffolding proteins regulate the formation, organization, and plasticity of excitatory synapses. Mutations in SHANK family genes are implicated in autism spectrum disorder and other neuropsychiatric conditions. However, the molecular mechanisms underlying Shank function are not fully understood, and no study to date has examined the consequences of complete loss of all Shank proteins in vivo. Here we characterize the single Drosophila Prosap/Shank family homolog. Shank is enriched at the postsynaptic membrane of glutamatergic neuromuscular junctions and controls multiple parameters of synapse biology in a dose-dependent manner. Both loss and overexpression of Shank result in defects in synaptic bouton number and maturation. We find that Shank regulates a noncanonical Wnt signaling pathway in the postsynaptic cell by modulating the internalization of the Wnt receptor Fz2. This study identifies Shank as a key component of synaptic Wnt signaling, defining a novel mechanism for how Shank contributes to synapse maturation during neuronal development.Keywords: postsynaptic scaffold, Shank, synaptic development, Wnt signalingNational Institutes of Health (U.S.) (Grant MH097680)Massachusetts Institute of Technology. Simons Center for the Social Brai
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Software development tools for the CDF MX scanner
This paper discuses the design of the high level assembler and diagnostic control program developed for the MX, a high speed, custom designed computer used in the CDF data acquisition system at Fermilab. These programs provide a friendly productive environment for the development of software on the MX. Details of their implementation and special features, and some of the lessons learned during their development are included
Learning and interaction in groups with computers: when do ability and gender matter?
In the research reported in this paper, we attempt to identify the background and process factors influencing the effectiveness of groupwork with computers in terms of mathematics learning. The research used a multi-site case study design in six schools and involved eight groups of six mixed-sex, mixed-ability pupils (aged 9-12) undertaking three research tasks â two using Logo and one a database. Our findings suggest that, contrary to other recent research, the pupil characteristics of gender and ability have no direct influence on progress in group tasks with computers. However, status effects â pupils' perceptions of gender and ability â do have an effect on the functioning of the group, which in turn can impede progress for all pupils concerned
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Developing a coding scheme for analysing classroom dialogue across d educational contexts.
The research reported sought to develop a framework for systematically analysing classroom dialogue for application across a range of educational settings. The paper outlines the development and refinement of a coding scheme that attempts to represent and operationalise commonalities amongst some key theorists in the field concerning productive forms of educational dialogue. The team has tested it using video recordings from classroom settings in the UK and Mexico, across age phases, subject areas, and different interactional contexts including whole class, group and paired work. Our Scheme for Educational Dialogue Analysis (SEDA) is situated within a sociocultural paradigm, and draws on Hymes' Ethnography of Communication to highlight the importance of context. We examined how such a tool could be used in practice. We found that concentrating on the âcommunicative actâ to explore dialogue between participants was an appropriate level of granularity, while clustering the 33 resulting codes according to function of the acts helped to highlight dialogic sequences within lessons. We report on the application of the scheme in two different learning contexts and reflect on its fitness for purpose, including perceived limitations. Development of specialised sub-schemes and a version for teachers is underway.This collaborative work was carried out for a project entitled âA Tool for Analysing Dialogic Interactions in Classroomsâ (http://tinyurl.com/BAdialogue) funded through the British Academy International Partnership and Mobility Scheme (ref. RG66509), between January 2013 - December 2015. We are most grateful to colleagues on the project teams who made significant contributions and helpful input during development and testing of the scheme and preparation of the manuscript, including Farah Ahmed, Riikka Hofmann, Christine Howe, Ruth Kershner, Fiona Jackson, Karen Littleton, Neil Mercer, Paul Warwick (UK team); Mariana AlarcĂłn, Nube Estrada, Erika Gil, Kissy GuzmĂĄn, Flora HernĂĄndez, JosĂ© HernĂĄndez, HaydeĂ© Pedraza, Ana Luisa Rubio, Brenda Itzel SĂĄnchez, Ana Laura Trigo, Maricela Velez (Mexico team). We also thank all of the teachers (especially Lloyd and Tania) and students who participated in our previous research from which examples were taken. We appreciate the support of the Economic and Social Research Council, sponsor of most of the UK teamâs work in this area over the years
A âLearning Revolutionâ? Investigating Pedagogic Practices around Interactive Whiteboards in British Primary Classrooms
Interactive whiteboards have been rapidly introduced into all primary schools under UK Government initiatives. These large, touch-sensitive screens, which control a computer connected to a digital projector, seem to be the first type of educational technology particularly suited for whole-class teaching and learning. Strong claims are made for their value by manufacturers and policy makers, but there has been little research on how, if at all, they influence established pedagogic practices, communicative processes and educational goals. This study has been designed to examine this issue, using observations in primary (elementary) school classrooms. It is funded by the UK Economic and Social Research Council and builds on the authorsâ previous research on ICT in educational dialogues and collaborative activities
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