1,564 research outputs found
Teacher Perceptions of Their Ability to Improve a High-Poverty Urban School
This study sought to gain insight into teacher perceptions of their ability to
improve a high poverty urban school. The school selected for this study came from a
purposive sampling of urban schools that had exited from improvement required status
and had then demonstrated gains in student academic performance in subsequent years.
Four teachers and two administrators were recruited to take part in this study. Two
teachers from English Language Arts and two teachers from math participated. These
two disciplines were selected due to the reliance on student performance in these two
areas on state and federal accountability ratings. Two administrators who had experience
during the time the school was in improvement required status and had participated in
seeing the school exit IR and make gains in student academic performance also
participated.
All participants participated in 45-minute, semi-structured interview.
Additionally, the teachers agreed to a 45-minute classroom observation where
instructional practices and questioning strategies were recorded according to established
protocols. Additional data sources included state and campus performance reports, the
schoolâs campus improvement plan, and anecdotal data from the researcherâs reflexive
journal kept during the study. Data from the interview were reviewed to find themes
that were consistent with prior research on collective efficacy and trust.
The data show that teachersâ perceptions of collective efficacy and trust were positive.
Four subthemes of collective efficacy; mastery experience, vicarious experience, social
persuasion, and affective state emerged from the analysis. Subthemes of trust that
emerged were supportive actions by the administrators and relational trust. The data from
the classroom observations indicated that the teachers who participated in this study
demonstrated higher level instructional practices and used questioning strategies that were
at a level above what prior research on teachers with economically disadvantaged students
had shown
A decade of monitoring Atlantic cod Gadus morhua spawning aggregations in Massachusetts Bay using passive acoustics
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Caiger, P. E., Dean, M. J., DeAngelis, A. I., Hatch, L. T., Rice, A. N., Stanley, J. A., Tholke, C., Zemeckis, D. R., & Van Parijs, S. M. A decade of monitoring Atlantic cod Gadus morhua spawning aggregations in Massachusetts Bay using passive acoustics. Marine Ecology Progress Series, 635, (2020): 89-103, doi:10.3354/meps13219.Atlantic cod Gadus morhua populations in the northeast USA have failed to recover since major declines in the 1970s and 1990s. To rebuild these stocks, managers need reliable information on spawning dynamics in order to design and implement control measures; discovering cost-effective and non-invasive monitoring techniques is also favorable. Atlantic cod form dense, site-fidelic spawning aggregations during which they vocalize, permitting acoustic detection of their presence at such times. The objective of this study was to detect spawning activity of Atlantic cod using multiple fixed-station passive acoustic recorders to sample across Massachusetts Bay during the winter spawning period. A generalized linear modeling approach was used to investigate spatio-temporal trends of cod vocalizing over 10 consecutive winter spawning seasons (2007-2016), the longest such timeline of any passive acoustic monitoring of a fish species. The vocal activity of Atlantic cod was associated with diel, lunar, and seasonal cycles, with a higher probability of occurrence at night, during the full moon, and near the end of November. Following 2009 and 2010, there was a general decline in acoustic activity. Furthermore, the northwest corner of Stellwagen Bank was identified as an important spawning location. This project demonstrated the utility of passive acoustic monitoring in determining the presence of an acoustically active fish species, and provides valuable data for informing the management of this commercially, culturally, and ecologically important species.Thanks to Eli Bonnell, Genevieve Davis, Julianne Bonell, Samara Haver, and Eric Matzen for assistance in MARU deployments, Dana Gerlach and Heather Heenehan for help in passive acoustic data analysis, and the NEFSC passive acoustics group for useful discussions. Funding for 2007â2012 passive acoustic surveys was provided by Excelerate Energy and Neptune LNG to
Cornell University. Fieldwork for 2013â2015 was funded through the 2013â2014 NOAA Saltonstall-Kennedy grant program (Award No. NA14NMF4270027), and jointly funded by The Nature Conservancy, Massachusetts Division of Marine Fisheries, and the Cabot Family Charitable Foundation. Funding for 2016 SoundTrap data was provided by NOAAâs Ocean Acoustics Program (4 Sanctuaries Project)
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The Effect of Judicial Decisions on Issue Salience and Legal Consciousness in Media Serving the LGBTQ+ Community
Scholars have long questioned whether and how courts influence society. We contribute to this debate by investigating the ability of judicial decisions to shape issue attention and affect toward courts in media serving the LGBTQ+ community. To do so, we compiled an original database of LGBTQ+ magazine coverage of court cases over an extended period covering major decisions, including Lawrence v. Texas (2003), Goodridge v. Massachusetts Department of Public Health (2003), and Lofton v. Secretary of Department of Children & Family Services (2004). We argue these cases influence the volume and tone of LGBTQ+ media coverage. Combining computational social science techniques with qualitative analysis, we find increased attention to same-sex marriage after the decisions in Lawrence, Goodridge, and Lofton, and the coalescence of discussions of courts around same-sex marriage after Lawrence. We also show how LGBTQ+ media informed readers about the political and legal implications of struggles over marriage equality
Digital Holography Experiments with Degraded Temporal Coherence
To simulate the effects of multiple-longitudinal modes and rapid fluctuations in center frequency, we use sinusoidal phase modulation and linewidth broadening, respectively. These effects allow us to degrade the temporal coherence of our master-oscillator laser, which we then use to conduct digital holography experiments. In turn, our results show that the coherence efficiency decreases quadratically with fringe visibility and that our measurements agree with our models to within 1.8% for sinusoidal phase modulation and 6.9% for linewidth broadening
Scaled Correlations of Critical Points of Random Sections on Riemann Surfaces
In this paper we prove that as N goes to infinity, the scaling limit of the
correlation between critical points z1 and z2 of random holomorphic sections of
the N-th power of a positive line bundle over a compact Riemann surface tends
to 2/(3pi^2) for small sqrt(N)|z1-z2|. The scaling limit is directly calculated
using a general form of the Kac-Rice formula and formulas and theorems of Pavel
Bleher, Bernard Shiffman, and Steve Zelditch.Comment: 55 pages. LaTeX. output.txt is the output of running
heisenberg_simpler.mpl through maple. heisenberg_simpler.mpl can be run by
maple at the command line by saying 'maple -q heisenberg_simpler.mpl' to see
the maple calculations that generated the matrices U(t) and D(t) described in
the paper's appendix. It may also be run by opening it with GUI mapl
Behavioral Changes in Aging but Not Young Mice after Neonatal Exposure to the Polybrominated Flame Retardant DecaBDE
BACKGROUND: After several decades of commercial use, the flame-retardant chemicals polybrominated diphenyl ethers (PBDEs) and their metabolites are pervasive environmental contaminants and are detected in the human body. Decabrominated diphenyl ether (decaBDE) is currently the only PBDE in production in the United States. OBJECTIVES: Little is known about the health effects of decaBDE. In the present study we examined the effects of neonatal decaBDE exposure on behavior in mice at two ages. METHODS: Neonatal male and female C57BL6/J mice were exposed to a daily oral dose of 0, 6, or 20 mg/kg decaBDE from postnatal days 2 through 15. Two age groups were examined: a cohort that began training during young adulthood and an aging cohort of littermates that began training at 16 months of age. Both cohorts were tested on a series of operant procedures that included a fixed-ratio I schedule of reinforcement, a fixed-interval (FI) 2-min schedule, and a light-dark visual discrimination. RESULTS: We observed minimal effects on the light-dark discrimination in the young cohort, with no effects on the other tasks. The performance of the aging cohort was significantly affected by decaBDE. On the FI schedule, decaBDE exposure increased the overall response rate. On the light-dark discrimination, older treated mice learned the task more slowly, made fewer errors on the first-response choice of a trial but more perseverative errors after an initial error, and had lower latencies to respond compared with controls. Effects were observed in both dose groups and sexes on various measures. CONCLUSIONS: These findings suggest that neonatal decaBDE exposure produces effects on behavioral tasks in older but not younger animals. The behavioral mechanisms responsible for the pattern of observed effects may include increased impulsivity, although further research is required
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