Where words collide: social class,schools and linguistic discontinuity     

Gerry Mac Ruairc 《British Journal of Sociology of Education》2011,32(4):541-561

The prestige accorded to standard language varieties, particularly within the field of education, together with language management role of schools with respect to the variety and the extent to which linguistic differences construct discontinuous relationships between the school and specific social groups provide the rationale for this paper. This qualitative study, based on a friendship focus group design, was conducted with two groups of 12-year-old children from contrasting ‘ideal type’, socio-economic groups over the period of one school year. Findings outline specific practices where the linguistic expectations and demands within school-space create different implications and outcomes for middle-class and working-class children as a result of their linguistic experiences in non-school space. The implications of these linguistic interactions on patterns of engagement with the school among the children in the sample are also considered.  相似文献   

Reevaluating the effect of non-teaching wages on teacher attrition     

Gregory A. Gilpin 《Economics of Education Review》2011,30(4):598-616

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Real time search on the web: Queries,topics, and economic value     

Bernard J. Jansen  Zhe Liu  Courtney Weaver  Gerry Campbell  Matthew Gregg 《Information processing & management》2011

Real time search is an increasingly important area of information seeking on the Web. In this research, we analyze 1,005,296 user interactions with a real time search engine over a 190 day period. Using query log analysis, we investigate searching behavior, categorize search topics, and measure the economic value of this real time search stream. We examine aggregate usage of the search engine, including number of users, queries, and terms. We then classify queries into subject categories using the Google Directory topical hierarchy. We next estimate the economic value of the real time search traffic using the Google AdWords keyword advertising platform. Results shows that 30% of the queries were unique (used only once in the entire dataset), which is low compared to traditional Web searching. Also, 60% of the search traffic comes from the search engine’s application program interface, indicating that real time search is heavily leveraged by other applications. There are many repeated queries over time via these application program interfaces, perhaps indicating both long term interest in a topic and the polling nature of real time queries. Concerning search topics, the most used terms dealt with technology, entertainment, and politics, reflecting both the temporal nature of the queries and, perhaps, an early adopter user-based. However, 36% of the queries indicate some geographical affinity, pointing to a location-based aspect to real time search. In terms of economic value, we calculate this real time search stream to be worth approximately US $33,000,000 (US $33 M) on the online advertising market at the time of the study. We discuss the implications for search engines and content providers as real time content increasingly enters the main stream as an information source.  相似文献   

Muscle metabolism and performance improvement after two training programmes of sprint running differing in rest interval duration     

Saraslanidis P  Petridou A  Bogdanis GC  Galanis N  Tsalis G  Kellis S  Mougios V 《Journal of sports sciences》2011,29(11):1167-1174

Repeated-sprint training often involves short sprints separated by inadequate recovery intervals. The effects of interval duration on metabolic and performance parameters are unclear. We compared the effects of two training programmes, differing in rest interval duration, on muscle (vastus lateralis) metabolism and sprint performance. Sixteen men trained three times a week for 8 weeks, each training session comprising 2-3 sets of two 80-m sprints. Sprints were separated by 10 s (n = 8) or 1 min (n = 8). Both training programmes improved performance in the 100-, 200-, and 300-m sprints, but the improvement was greater in the 10-s group during the final 100 m of the 200- and 300-m runs. Independent of interval duration, training mitigated the drop of muscle ATP after two 80-m sprints. The drop in phosphocreatine and the increases in glucose-6-phosphate and fructose-6-phosphate after two 80-m sprints were greater in the 10-s group. In conclusion, training with a limited number of repeated short sprints (≤10 s) may be more effective in improving speed maintenance in 200- and 300-m runs when performed with a 1:1 rather than a 1:6 exercise-to-rest ratio. This may be due to a greater activation of glycolysis caused, in part, by the limited resynthesis of phosphocreatine during the very short rest interval.  相似文献   

Validation of MET estimates and step measurement using the ActivPAL physical activity logger     

Harrington DM  Welk GJ  Donnelly AE 《Journal of sports sciences》2011,29(6):627-633

The purpose of this study was to determine the validity of the metabolic equivalent (MET) equation and step rate function of the ActivPAL? physical activity logger in a group of females. Using a standard treadmill protocol, 62 females aged 15-25 years walked on a treadmill at speeds between 3.2 and 7.0 km · h(-1) while wearing an ActivPAL. Oxygen consumption was measured using expired gas analysis at each speed and METs for each speed were estimated based on each participant's own resting metabolic rate. A sub-set of 18 participants also wore an Actigraph. Results showed that the in-built equation in the ActivPAL significantly underestimated (P < 0.001) METs under treadmill conditions at higher intensities. The ActivPAL equation is based on step rate yet the relationship between counts and measured METs (r = 0.76; P < 0.001) is stronger than that between steps and measured METs (r = 0.59; P < 0.001). Both the ActivPAL and Actigraph step functions showed no significant difference (P > 0.05) to video recorded step rate except at the slowest walking speed where the Actigraph significantly underestimated steps (P < 0.05). The development of a new equation based on the counts-METs relationship that includes a variety of speeds and activities would be useful. The ActivPAL step function performs better than the Actigraph at the slowest walking speed under treadmill conditions.  相似文献   

Are governments complying with transparency? Findings from 15 years of evaluation     

Gregory Michener  Jonas Coelho  Davi Moreira 《Government Information Quarterly》2021,38(2):101565

How well do governments comply with their own transparency statutes? Alarmingly, answers to this question are in short supply because of patchy comparative data. This study begins to address this gap by analyzing an exhaustive compilation of 265 transparency compliance evaluations (i.e. audits) authored by NGOs, academics, and government oversight authorities across Latin America between 2003 and 2018. Aggregating data on patterns of evaluation and public sector compliance with transparency statutes, we find modest increases in compliance over time, strikingly low compliance with passive transparency compliance (i.e. governmental responses to citizen requests) at the local versus national levels of government, and significantly higher compliance scores when government oversight agencies act as evaluators. Our data also reveal worrying gaps in evaluation efforts. Evaluators tend to focus far more on active transparency (i.e. website-based disclosure) than passive transparency, more on national level governments than subnational governments, and preponderantly on the executive as opposed to legislative or judicial branches of government. Textual analyses show that education is the most evaluated policy theme, with financial policies and social services close behind. In presenting the first large-scale cross-national assessment of transparency compliance, the current study brings to light trends in the effectiveness of transparency regimes and patterns of transparency evaluation across Latin America.  相似文献   

Note-taking within MetaTutor: interactions between an intelligent tutoring system and prior knowledge on note-taking and learning     

Gregory Trevors  Melissa Duffy  Roger Azevedo 《Educational technology research and development : ETR & D》2014,62(5):507-528

Hypermedia learning environments (HLE) unevenly present new challenges and opportunities to learning processes and outcomes depending on learner characteristics and instructional supports. In this experimental study, we examined how one such HLE—MetaTutor, an intelligent, multi-agent tutoring system designed to scaffold cognitive and metacognitive self-regulated learning (SRL) processes—interacts with learner’s prior domain knowledge to affect their note-taking activities and subsequent learning outcomes. Sixty (N = 60) college students studied with MetaTutor for 120 min and took notes on hypermedia content of the human circulatory system. Log-files and screen recordings of learner-system interactions were used to analyze notes for several quantitative and qualitative variables. Results show that most note-taking was a verbatim copy of instructional content, which negatively related to the post-test measure of learning. There was an interaction between prior knowledge and pedagogical agent scaffolding, such that low prior knowledge students took a greater quantity of notes compared to their high prior knowledge counterparts, but only in the absence of MetaTutor SRL scaffolding; when agent SRL scaffolding was present, the note-taking activities of low prior knowledge students were statistically equivalent to the number of notes taken by their high prior knowledge counterparts. Theoretical and instructional design implications are discussed.  相似文献   

Quantifying Stakeholder Values of VET Provision in the Netherlands     

Margriet E. van der Sluis  Gerry J. Reezigt  Lex Borghans 《Vocations and Learning》2014,7(1):1-19

It is well-known that the quality of vocational education and training (VET) depends on how well a given programme aligns with the values and interests of its stakeholders, but it is less well-known what these values and interests are and to what extent they are shared across different groups of stakeholders. We use vignettes to quantify the values that four groups of stakeholders assign to nine attributes relating to VET quality. The four stakeholders are students, teachers, workplace training supervisors, and policymakers. The nine attributes are employers’ appreciation of students, graduation rate, obtained language skills of students, mentoring hours in workplace learning, challenge, structure, students’ appreciation of teachers, schooling hours, and attention to civic education. Five hundred thirty-one Dutch respondents were repeatedly asked to rank a set of four hypothetical programmes, each with a specific value on the nine quality indicators. Through conjoint analysis we obtain the values that the stakeholders assigned to the nine attributes when evaluating the quality of VET programmes. The values assigned to the attributes ‘a challenging curriculum’ and ‘employers’ satisfaction’ were similar across the four groups of stakeholders, yet the values assigned to the remaining attributes differed substantially across stakeholders. This illustrates the diversity in values and interests of different stakeholders, and points to a need to quantify these values, for use by both the Dutch government and VET colleges, to improve the overall quality of education and the match between vocational programmes and their stakeholders.  相似文献   

What is task-centered learning?     

Gregory M. Francom  Joel Gardner 《TechTrends》2014,58(5):27-35

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Archives as multifaceted narratives: linking the ‘touchstones’ of community memory     

Belinda Battley  Elizabeth Daniels  Gregory Rolan 《档案与原稿》2014,42(2):155-157

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