259 research outputs found
Shared reading of children's interactive picture books
We report on a study of children and parents shared reading of interactive printed books. We investigated the differences between books with interactive features and books with expressive typography in order to evaluate which features within a book encouraged interaction between the reading participants and the book. 11 parent and child groups took part in the study that involved three observed reading sessions. From our observations we offer suggestions for the development of books and eBooks to encourage shared reading practices
New insights into atmospherically relevant reaction systems using direct analysis in real-time mass spectrometry (DART-MS)
The application of direct analysis in real-time mass spectrometry (DART-MS),
which is finding increasing use in atmospheric chemistry, to two different
laboratory model systems for airborne particles is investigated: (1) submicron C3–C7 dicarboxylic acid (diacid) particles reacted with
gas-phase trimethylamine (TMA) or butylamine (BA) and (2) secondary organic
aerosol (SOA) particles from the ozonolysis of α-cedrene. The diacid
particles exhibit a clear odd–even pattern in their chemical reactivity
toward TMA and BA, with the odd-carbon diacid particles being substantially
more reactive than even ones. The ratio of base to diacid in reacted
particles, determined using known diacid–base mixtures, was compared to that
measured by high-resolution time-of-flight aerosol mass spectrometry
(HR-ToF-AMS), which vaporizes the whole particle. Results show that DART-MS
probes ∼ 30 nm of the surface layer, consistent with other
studies on different systems. For α-cedrene SOA particles, it is
shown that varying the temperature of the particle stream as it enters the
DART-MS ionization region can distinguish between specific components with
the same molecular mass but different vapor pressures. These results
demonstrate the utility of DART-MS for (1) examining reactivity of
heterogeneous model systems for atmospheric particles and (2) probing
components of SOA particles based on volatility
Particle identification studies with a full-size 4-GEM prototype for the ALICE TPC upgrade
A large Time Projection Chamber is the main device for tracking and
charged-particle identification in the ALICE experiment at the CERN LHC. After
the second long shutdown in 2019/20, the LHC will deliver Pb beams colliding at
an interaction rate of about 50 kHz, which is about a factor of 50 above the
present readout rate of the TPC. This will result in a significant improvement
on the sensitivity to rare probes that are considered key observables to
characterize the QCD matter created in such collisions. In order to make full
use of this luminosity, the currently used gated Multi-Wire Proportional
Chambers will be replaced. The upgrade relies on continuously operated readout
detectors employing Gas Electron Multiplier technology to retain the
performance in terms of particle identification via the measurement of the
specific energy loss by ionization d/d. A full-size readout chamber
prototype was assembled in 2014 featuring a stack of four GEM foils as an
amplification stage. The performance of the prototype was evaluated in a test
beam campaign at the CERN PS. The d/d resolution complies with both the
performance of the currently operated MWPC-based readout chambers and the
challenging requirements of the ALICE TPC upgrade program. Detailed simulations
of the readout system are able to reproduce the data.Comment: Submitted to NIM
A Meta-analysis of Attachment to Parents and Delinquency
To investigate the link between attachment to parents and delinquency, and the potential moderating effects of age and sex, 74 published and unpublished manuscripts (N = 55,537 participants) were subjected to a multilevel meta-analysis. A mean small to moderate effect size was found (r = 0.18). Poor attachment to parents was significantly linked to delinquency in boys and girls. Stronger effect sizes were found for attachment to mothers than attachment to fathers. In addition, stronger effect sizes were found if the child and the parent had the same sex compared to cross-sex pairs of children and parents. Age of the participants moderated the link between attachment and delinquency: larger effect sizes were found in younger than in older participants. It can be concluded that attachment is associated with juvenile delinquency. Attachment could therefore be a target for intervention to reduce or prevent future delinquent behavior in juveniles
Texas Center for Digital Humanities and New Media
We propose the creation of a Center for Digital Humanities, Media and Culture (formerly titled Texas Center for Digital Humanities and New Media). The Center will address two related grand challenges: the need to investigate the relationship of computing technologies and culture, and the need to construct cyberinfrastructure for the humanities and social sciences. The Center’s research, focused in four interrelated areas -- the cultural record, cultural systems, cultural environments, and cultural interactions in the digital age – engages one of the most compelling questions of our time: What does it mean to be human in the digital age
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