5,963 research outputs found
Antibullying Interventions in Schools : Ingredients of Effective Programs
Because bullying is a serious problem in Canadian schools, antibullying programs have been widely implemented to redress the problem. School principals in Ontario (N=395) completed a questionnaire to document the severity of bullying, the amount of anti‐bullying resources, and the variety of antibullying activities in their schools. Results reveal that reductions in bullying in previous years, sufficiency of resources for resolving bullying, and amounts of antibullying programming were all positively associated antibullying program outcomes. These data suggest that the investment of time, effort, and money in school‐based antibullying initiatives can lead to safer and more peaceful schools environments. Key words: bullying, primary prevention, program evaluation Comme l’intimidation est un problème sérieux dans les écoles canadiennes, des programmes de lutte contre l’intimidation font leur apparition un peu partout. Des directeurs et directrices d’école en Ontario (N = 395) ont rempli un questionnaire visant à documenter la gravité du problème, les ressources existantes et les diverses activités anti‐intimidation mises en place dans les écoles. D’après les résultats du questionnaire, la réduction de l’intimidation au cours des années précédentes, la pertinence des ressources en place pour faire face aux incidents d’intimidation et le nombre de programmes de lutte contre l’intimidation étaient tous corrélés à l’amélioration des résultats en la matière. Ces données semblent indiquer que le temps, les efforts et les fonds investis dans les initiatives anti‐intimidation contribuent à créer un climat de paix et rendre les écoles plus sécuritaires. Mots clés : intimidation, prévention, évaluation de programmes.
Data Analysis Techniques for Fan Performance in Highly-Distorted Flows from Boundary Layer Ingesting Inlets
The design of a unique distortion-tolerant fan for a high-bypass ratio boundary-layer ingesting propulsion system has been completed and a rig constructed and tested in the NASA Glenn 8x6 wind tunnel. Processing the data from the experiment presented some interesting challenges because of the complexity of the experimental setup and the flow through the test rig. The experiment was run in three phases, each of which employed a unique complement of inlet throat and fan face instrumentation to avoid the blockage that would have resulted from simultaneously installing all of the rakes. The measurement from the individual test points were subsequently combined to compute the overall stage performance. A CFD model of the experiment was used to gain understanding of the flow field and to test some of the techniques proposed for interpolating and extrapolating the measurements into regions where measurements were not made. This capability became extremely useful when it was discovered that there was an unexpected total temperature distortion in the tunnel. The CFD model was modified by inserting a total temperature profile at the upstream boundary that mimicked the measured distortion where measurements were available and that CFD solution was used to investigate methods to infer the complete total temperature field at the fan face
The Star Formation Across Cosmic Time (SFACT) Survey. III. Spectroscopy of the Initial Catalog of Emission-Line Objects
The Star Formation Across Cosmic Time (SFACT) survey is a new narrowband
survey designed to detect emission-line galaxies (ELGs) and quasi-stellar
objects (QSOs) over a wide range of redshifts in discrete redshift windows. The
survey utilizes the WIYN 3.5m telescope and the Hydra multifiber positioner to
perform efficient follow-up spectroscopy on galaxies identified in the imaging
part of the survey. Since the objects in the SFACT survey are selected by their
strong emission lines, it is possible to obtain useful spectra for even the
faintest of our sources (r ~ 25). Here we present the 453 objects that have
spectroscopic data from the three SFACT pilot-study fields, 415 of which are
confirmed ELGs. The methodology for processing and measuring these data is
outlined in this paper and example spectra are displayed for each of the three
primary emission lines used to detect objects in the survey (H-alpha, [O
III]5007, and [O II]3727). Spectra of additional QSOs and non-primary
emission-line detections are also shown as examples. The redshift distribution
of the pilot-study sample is examined and the ELGs are placed in different
emission-line diagnostic diagrams in order to distinguish the star-forming
galaxies from the active galactic nuclei.Comment: 20 pages, 10 figures. Accepted for publication in the Astronomical
Journa
Further considerations for placebo controls in surgical trials
© 2023. The Author(s).Peer reviewedPublisher PD
How do pilot and feasibility studies inform randomised placebo-controlled trials in surgery? : A systematic review
© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY. Published by BMJ.Peer reviewedPublisher PD
Selecting the geology filter wavelengths for the ExoMars Panoramic Camera Instrument
The Panoramic Camera (PanCam) instrument will provide surface remote sensing data for the ExoMars mission. A combination of wide-angle stereo, multispectral, and high resolution imagery will generate contextual geological information to help inform which scientific targets should be selected for drilling and analysis. One component of the PanCam dataset is narrowband multispectral imaging in the visible to near infrared, which utilises a dedicated set of 12 “geology” filters of predetermined wavelength and bandwidth to view the terrain, and provide information on composition and putative mineralogy. The centre wavelengths and bandwidths of these filters were optimised to account for the highly diverse mineralogical terrains the ExoMars rover will hopefully encounter. Six new alternative test filter sets were created, each optimised for the detection of either: sulfates, phyllosilicates, ferric oxides, mafic silicates, iron absorptions, and minor hydration absorptions. These six filter sets were cross-tested using database mineral reflectance spectra and Mars analogue rock multispectral data to find the best performing filter set. Once selected, the bandwidths of this filter set were also optimised. The filter set optimised to ferric oxide minerals was able to most accurately represent rock multispectral data, as well as capture subtle spectral features of hydrated minerals, including sulfates, phyllosilicates, and carbonates. These filters differ from those used on past missions (e.g., Pathfinder, Mars Exploration Rover) and represent the next evolutionary stage in PanCam instrument development. When compared to past filter sets, the updated ExoMars filters capture rock and mineral spectral data more effectively, enhancing the ability of the ExoMars PanCam to detect lithological and compositional variation within an outcrop
Mass Segregation in the Globular Cluster Palomar 5 and its Tidal Tails
We present the stellar main sequence luminosity function (LF) of the
disrupted, low-mass, low-concentration globular cluster Palomar 5 and its
well-defined tidal tails, which emanate from the cluster as a result of its
tidal interaction with the Milky Way. The results of our deep (B ~ 24.5)
wide-field photometry unequivocally indicate that preferentially fainter stars
were removed from the cluster so that the LF of the cluster's main body
exhibits a significant degree of flattening compared to other globular
clusters. There is clear evidence of mass segregation, which is reflected in a
radial variation of the LFs. The LF of the tidal tails is distinctly enhanced
with faint, low-mass stars. Pal 5 exhibits a binary main sequence, and we
estimate a photometric binary frequency of roughly 10%. Also the binaries show
evidence of mass segregation with more massive binary systems being more
strongly concentrated toward the cluster center.Comment: 14 pages, 12 figures, accepted for publication in the Astronomical
Journa
Patient information leaflets for placebo-controlled surgical trials : a review of current practice and recommendations for developers
Contributions Sian Cousin: methodology; formal analysis; writing—original draft; writing—review and editing; visualisation. Marc Huttman: data collection, review and editing. Natalie Blencowe: conceptualisation; methodology; formal analysis; writing—original draft; writing—review and editing; visualisation. Carmen Tsang: data collection, review and editing. Daisy Elliott: formal analysis, review and editing. Jane Blazeby: review and editing. David Beard: conceptualisation, review and editing. Marion Campbell: conceptualisation, review and editing. Katie Gillies: conceptualisation; methodology; formal analysis; writing—original draft; writing—review and editing; visualisation.Peer reviewe
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