2,141 research outputs found
Library choices of intermediate grade pupils
Thesis (M.A.)--Boston University, 1947. This item was digitized by the Internet Archive
The subdwarf B star SB 290 - A fast rotator on the extreme horizontal branch
Hot subdwarf B stars (sdBs) are evolved core helium-burning stars with very
thin hydrogen envelopes. In order to form an sdB, the progenitor has to lose
almost all of its hydrogen envelope right at the tip of the red giant branch.
In close binary systems, mass transfer to the companion provides the
extraordinary mass loss required for their formation. However, apparently
single sdBs exist as well and their formation is unclear since decades. The
merger of helium white dwarfs leading to an ignition of core helium-burning or
the merger of a helium core and a low mass star during the common envelope
phase have been proposed. Here we report the discovery of SB 290 as the first
apparently single fast rotating sdB star located on the extreme horizontal
branch indicating that those stars may form from mergers.Comment: 5 pages, 4 figures, A&A letters, accepte
Desmoglein 3 acts as a potential oncogene in promoting cancer cell migration and invasion through regulating AP-1 and PKC dependent-Ezrin activation
Conference: 20th Anniversary Conference of the British-Skin-Foundation on Skin Deep - 20 Years of Research
Location: Roayl Coll Phys, London, ENGLAND
Date: OCT 13, 2016British Skin Fd
The MultiSite Spectroscopic Telescope campaign: 2m spectroscopy of the V361 Hya variable PG1605+072
We present results and analysis for the 2m spectroscopic part of the
MultiSite Spectroscopic Telescope (MSST) campaign undertaken in May/June 2002.
The goal of the project was to observe the pulsating subdwarf B star PG1605+072
simultaneously in velocity and photometry and to resolve as many of the >50
known modes as possible, which will allow a detailed asteroseismological
analysis. We have obtained over 150 hours of spectroscopy, leading to an
unprecedented noise level of only 207m/s. We report here the detection of 20
frequencies in velocity, with two more likely just below our detection
threshold. In particular, we detect 6 linear combinations, making PG1605+072
only the second star known to show such frequencies in velocity. We investigate
the phases of these combinations and their parent modes and find relationships
between them that cannot be easily understood based on current theory. These
observations, when combined with our simultaneous photometry, should allow
asteroseismology of this most complicated of sdB pulsators.Comment: 9 pages, 5 figures, accepted for publication in A&A; Figure 1 at
lower resolution than accepted versio
Gaussian Process models for ubiquitous user comfort preference sampling; global priors, active sampling and outlier rejection.
This paper presents a ubiquitous thermal comfort preference learning study in a noisy environment. We introduce Gaussian Process models into this field and show they are ideal, allowing rejection of outliers, deadband samples, and produce excellent estimates of a users preference function. In addition, informative combinations of users preferences becomes possible, some of which demonstrate well defined maxima ideal for control signals. Interestingly, while those users studied have differing preferences, their hyperparameters are concentrated allowing priors for new users. In addition, we present an active learning algorithm which estimates when to poll users to maximise the information returned
Strengthening socio-emotional learning in Aotearoa New Zealand: Teacher and whÄnau understanding of wellbeing
CAUL Read and Publish agreementInternational data provide evidence of the strong association between socio-emotional learning and wellbeing in students. However, while socio-emotional learning programmes are generally viewed as effective in developing socio-emotional capacities in students, culture is rarely considered within frameworks underpinning such programmes. In Aotearoa New Zealand, the high variability found in schools relating to approaches to develop wellbeing likely reflects universalistic conceptualisations of wellbeing and the low consideration for culture and language in socio-emotional learning. This indicates the need to develop a framework for socio-emotional learning that reflects the context of Aotearoa New Zealand. In the current article, we explore the socio-emotional understandings of teachers, and families and MÄori whÄnau through wÄnanga and intentional noticing within a design-based research methodology to inform the development of a co-constructed framework for socioemotional learning. Crucial to socio-emotional learning were the relationships between students, teachers, families and MÄori whÄnau across the learning pathway. Relationships were viewed as being underpinned by communication skills and holding understandings of emotions and emotional states. Overall, culture, language, and identity were viewed by as fundamental to wellbeing and should be at the fore of frameworks for socio-emotional learning, which should be localised within Indigenous understandings of wellbeing.fals
Weak magnetic fields in white dwarfs and their direct progenitors?
We have carried out a re-analysis of polarimetric data of central stars of
planetary nebulae, hot subdwarfs, and white dwarfs taken with FORS1 (FOcal
Reducer and low dispersion Spectrograph) on the VLT (Very Large Telescope), and
added a large number of new observations in order to increase the sample. A
careful analysis of the observations using only one wavelength calibration for
the polarimetrically analysed spectra and for all positions of the retarder
plate of the spectrograph is crucial in order to avoid spurious signals. We
find that the previous detections of magnetic fields in subdwarfs and central
stars could not be confirmed while about 10% of the observed white dwarfs have
magnetic fields at the kilogauss level.Comment: 6 pages, Proceedings of the 18th European White Dwarf Workshop, ASP
Conference Serie
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