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91.
Jacob E. Barkley Ellen Glickman Curtis Fennell Mallory Kobak Megan Frank Gregory Farnell 《Journal of sports sciences》2019,37(7):735-740
Low-cost physical activity monitors may provide a more accurate measure of physical activity than subjective methods (e.g., self-report) while being less costly than research-grade accelerometers. The present study assessed the validity of a low-cost monitor (Movband 2) to estimate physical activity behavior/intensity. Participants (N = 23, n = 16 female, BMI = 22.9 ± 4.0 kg/m2, age = 21.9 ± 1.6 years) completed four, five-minute treadmill stages (2.0, 3.0, 4.0, 5.0 MPH) while wearing both the Movband and the previously-validated Actigraph monitor. Oxygen consumption (VO2) was recorded during each stage (Laboratory assessment). A subset (n = 15, n = 10 female, BMI = 22.2 ± 3.2 kg/m2, age = 21.5 ± 0.8 years) of these participants then wore the two accelerometers for three days (Free-living assessment). During the Laboratory assessment there were strong, significant (r = 0.94, p ≤ 0.001) relationships between Movband and Actigraph counts and VO2. During Free-living assessment there was also a strong, significant (r = 0.97, p < 0.001) correlation between Movband and Actigraph counts. The low-cost, Movband accelerometer appears to provide a valid assessment of physical activity behavior/intensity. 相似文献
92.
Merle Jacob 《Minerva》2009,47(4):391-405
The new prominence given to science for economic growth and industry comes with an increased policy focus on the promotion
of commodification and commercialization of academic science. This paper posits that this increased interest in commodification
is a new steering mechanism for governing science. This is achieved by first outlining what is meant by the commodification
of scientific knowledge through reviewing a selection of literatures on the concept of commodification. The paper concludes
with a discussion of how commodification functions as a means for governing science. 相似文献
93.
This study examines the ways single Black mothers contribute to the educational success of their 11th-grade sons, despite the fact that their sons are enrolled in “failing schools.” Data from five interviews and one focus group reveal common characteristics of how single-Black mothers help their sons beat the odds. 相似文献
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96.
This study seeks to shed light on the informal process of knowledge production in criminology and criminal justice by examining acknowledgements in journal publications. Studying the structure of research collaboration among scholars may enhance our understanding of the discipline’s organization. We test hypotheses derived from prior research by analyzing acknowledgements in 786 articles from five journals in criminology and criminal justice over the last five years. As anticipated by the “invisible college” hypothesis, criminology and criminal justice scholarship contains a small group of individuals who receive a disproportionate share of acknowledgements. Additionally, we find that higher ranked and more productive scholars are awarded more acknowledgements than their lower ranked and less productive counterparts. Integrating acknowledgements as an unofficial assessment tool may improve the collective endeavor of contemporary science in our field. Overall, the influence of the “invisible colleagues,” measured by acknowledgements, demonstrates the value of collaboration in the process of knowledge production. 相似文献
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98.
Much has been written about how to evaluate static graphics from the perspective of clarity, ethics, efficiency, and power relations. However, when considering interactive graphics, agency must enter the conversation. This article develops a typology to understand the balance of agency between the designers and users of interactive graphics. The authors use this typology to interrogate 2 contemporary theories of rhetorical agency advanced by Miller and by Herndl and Licona. 相似文献
99.
Harisha Ramachandraiah Sahar Ardabili Asim M. Faridi Jesper Gantelius Jacob M. Kowalewski Gustaf M?rtensson Aman Russom 《Biomicrofluidics》2014,8(3)
Passive particle focusing based on inertial microfluidics was recently introduced as a
high-throughput alternative to active focusing methods that require an external force field to
manipulate particles. In inertial microfluidics, dominant inertial forces cause particles to move
across streamlines and occupy equilibrium positions along the faces of walls in flows through
straight micro channels. In this study, we systematically analyzed the addition of secondary Dean
forces by introducing curvature and show how randomly distributed particles entering a simple
u-shaped curved channel are focused to a fixed lateral position exiting the curvature. We found the
lateral particle focusing position to be fixed and largely independent of radius of curvature and
whether particles entering the curvature are pre-focused (at equilibrium) or randomly distributed.
Unlike focusing in straight channels, where focusing typically is limited to channel cross-sections
in the range of particle size to create single focusing point, we report here particle focusing in a
large cross-section area (channel aspect ratio 1:10). Furthermore, we describe a simple u-shaped
curved channel, with single inlet and four outlets, for filtration applications. We demonstrate
continuous focusing and filtration of 10 μm particles (with >90% filtration
efficiency) from a suspension mixture at throughputs several orders of magnitude higher than flow
through straight channels (volume flow rate of 4.25 ml/min). Finally, as an example of high
throughput cell processing application, white blood cells were continuously processed with a
filtration efficiency of 78% with maintained high viability. We expect the study will aid in the
fundamental understanding of flow through curved channels and open the door for the development of a
whole set of bio-analytical applications. 相似文献
100.
In this paper, we estimate the impact of receiving an NIH postdoctoral training grant on subsequent publications and citations. Our sample consists of all applications for NIH postdoctoral training grants (unsuccessful as well as successful) from 1980 to 2000. Both ordinary least squares and regression discontinuity estimates show that receipt of an NIH postdoctoral fellowship leads to about one additional publication over the next five years, which reflects a 20% increase in research productivity. 相似文献