349 research outputs found
Indigenous University Student Persistence: : Supports, Obstacles, and Recommendations
The tumultuous history of Indigenous education in Canada has negatively affected the persistence of Indigenous peoples at university. The research goals of this study were to identify the key supports and obstacles related to Indigenous university student persistence and to make recommendations as to how to improve levels of persistence. Combining interview, survey, and database information with 527 Indigenous students revealed that the strongest factors related to persistence were (a) social engagement, including good relationships with faculty and students, and support services provided by the Indigenous gathering place for Indigenous students on campus; (b) cognitive, such as academic support at university, learning effectively on their own, and hands-on teaching; (c) physical, including insufficient financial support and availability of affordable housing and child care; and (d) cultural, including connections with Indigenous faculty and culture. Age, home location, and parental education were not found to be related to persistence.
Keywords: Indigenous, Aboriginal, persistence, university, graduation, Indigenous student experience, CanadaLâhistoire tumultueuse de lâĂ©ducation des Autochtones au Canada a eu un impact nĂ©gatif sur la persistance des populations autochtones Ă lâuniversitĂ©. Cette recherche avait pour but dâidentifier les principaux soutiens et obstacles liĂ©s Ă la persĂ©vĂ©rance des Ă©tudiants autochtones Ă lâuniversitĂ© et de formuler des recommandations. Des entretiens, des enquĂȘtes et des bases de donnĂ©es convergentes de 527 Ă©tudiants autochtones rĂ©vĂšlent que les facteurs les plus importants liĂ©s Ă la persĂ©vĂ©rance sont : a) sociaux â notamment les bonnes relations avec le corps enseignant et les Ă©tudiants ainsi que les services fournis par le lieu de rassemblement des Autochtones sur le campus ; b) cognitifs â comme le soutien scolaire Ă lâuniversitĂ©, lâapprentissage efficace personnel et lâenseignement pratique ; c) physiques â dont lâinsuffisance de soutien financier, de logement abordable et de services de garde dâenfants ; et d) culturels â principalement en lien avec le nombre dâenseignants autochtones et la culture. LâĂąge, le lieu de rĂ©sidence et le niveau dâĂ©ducation des parents ne semblent pas associĂ©s Ă la persistance.
Mots-clés : autochtones, premiÚres nations, persistance, université, diplomation, expérience des étudiants autochtones, Canad
Improved asymmetry prediction for short interfering RNA s
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/102096/1/febs12599.pd
First evidence of coherent meson production in neutrino-nucleus scattering
Neutrino-induced charged-current coherent kaon production,
, is a rare, inelastic electroweak process
that brings a on shell and leaves the target nucleus intact in its ground
state. This process is significantly lower in rate than neutrino-induced
charged-current coherent pion production, because of Cabibbo suppression and a
kinematic suppression due to the larger kaon mass. We search for such events in
the scintillator tracker of MINERvA by observing the final state ,
and no other detector activity, and by using the kinematics of the final state
particles to reconstruct the small momentum transfer to the nucleus, which is a
model-independent characteristic of coherent scattering. We find the first
experimental evidence for the process at significance.Comment: added ancillary file with information about the six kaon candidate
Electric field-controlled synthesis and characterisation of single metal-organic-framework nanoparticles
Achieving control over the size distribution of metal organic framework (MOF) nanoparticles is key to biomedical applications and seeding techniques. Electrochemical control over the nanoparticle synthesis of the MOF, HKUSTâ1, is achieved using a nanopipette injection method to locally mix Cu 2+ salt precursor and benzene tricarboxylate (BTC 3â ) ligand reagents, form MOF nanocrystals, and collect and characterise them on a TEM grid. In situ analysis of the size and translocation frequency of HKUSTâ1 nanoparticles is demonstrated, using the nanopipette to detect resistive pulses as nanoparticles form. Complementary modelling of mass transport in the electric field, enables particle size to be estimated and explains the feasibility of particular reaction conditions, including inhibitory effects of excess BTC 3â . These new methods should be applicable to a variety of MOFs, and scaling up synthesis possible via arrays of nanoscale reaction centres, for example using nanopore membranes
Direct Measurement of Nuclear Dependence of Charged Current Quasielastic-like Neutrino Interactions using MINERvA
Charged-current interactions on carbon, iron, and lead with a
final state hadronic system of one or more protons with zero mesons are used to
investigate the influence of the nuclear environment on quasielastic-like
interactions. The transfered four-momentum squared to the target nucleus,
, is reconstructed based on the kinematics of the leading proton, and
differential cross sections versus and the cross-section ratios of iron,
lead and carbon to scintillator are measured for the first time in a single
experiment. The measurements show a dependence on atomic number. While the
quasielastic-like scattering on carbon is compatible with predictions, the
trends exhibited by scattering on iron and lead favor a prediction with
intranuclear rescattering of hadrons accounted for by a conventional particle
cascade treatment. These measurements help discriminate between different
models of both initial state nucleons and final state interactions used in the
neutrino oscillation experiments
Single neutral pion production by charged-current interactions on hydrocarbon at 3.6 GeV
Single neutral pion production via muon antineutrino charged-current
interactions in plastic scintillator (CH) is studied using the \minerva
detector exposed to the NuMI low-energy, wideband antineutrino beam at
Fermilab. Measurement of this process constrains models of neutral pion
production in nuclei, which is important because the neutral-current analog is
a background for appearance oscillation experiments. The
differential cross sections for momentum and production angle, for
events with a single observed and no charged pions, are presented and
compared to model predictions. These results comprise the first measurement of
the kinematics for this process.Comment: 6 pages, 5 figures, submitted to Physics Letters
MINERvA neutrino detector response measured with test beam data
The MINERvA collaboration operated a scaled-down replica of the solid
scintillator tracking and sampling calorimeter regions of the MINERvA detector
in a hadron test beam at the Fermilab Test Beam Facility. This article reports
measurements with samples of protons, pions, and electrons from 0.35 to 2.0
GeV/c momentum. The calorimetric response to protons, pions, and electrons are
obtained from these data. A measurement of the parameter in Birks' law and an
estimate of the tracking efficiency are extracted from the proton sample.
Overall the data are well described by a Geant4-based Monte Carlo simulation of
the detector and particle interactions with agreements better than 4%, though
some features of the data are not precisely modeled. These measurements are
used to tune the MINERvA detector simulation and evaluate systematic
uncertainties in support of the MINERvA neutrino cross section measurement
program.Comment: as accepted by NIM
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