9,113 research outputs found
Effects of self-consistent rest-ultraviolet colours in semi-empirical galaxy formation models
Connecting the observed rest-ultraviolet (UV) luminosities of high-
galaxies to their intrinsic luminosities (and thus star formation rates)
requires correcting for the presence of dust. We bypass a common
dust-correction approach that uses empirical relationships between infrared
(IR) emission and UV colours, and instead augment a semi-empirical model for
galaxy formation with a simple -- but self-consistent -- dust model and use it
to jointly fit high- rest-UV luminosity functions (LFs) and colour-magnitude
relations (-). In doing so, we find that UV colours
evolve with redshift (at fixed UV magnitude), as suggested by observations,
even in cases without underlying evolution in dust production, destruction,
absorption, or geometry. The observed evolution in our model arises due to the
reduction in the mean stellar age and rise in specific star formation rates
with increasing . The UV extinction, , evolves similarly
with redshift, though we find a systematically shallower relation between
and than that predicted by IRX-
relationships derived from galaxy samples. Finally, assuming that
high transmission () is a reliable LAE indicator,
modest scatter in the effective dust surface density of galaxies can explain
the evolution both in - and LAE fractions. These
predictions are readily testable by deep surveys with the James Webb Space
Telescope.Comment: 14+4 pages, 11+5 figures, accepted for publication in MNRA
Caring in Kent: Patterns and Profiles, Evidence from the Kent Health and Lifestyle Survey, 2005
The ‘Caring in Kent’ report draws on the results of a Kent wide ‘Health and Lifestyle Survey’ conducted in 2005; this included a module on caring. This enables a picture of caring to be reported including: a general profile of carers, levels and types of care-giving, carers’ health, and the level and types of support they receive.
‘Carers provide unpaid care by looking after an ill, frail or disabled family member, friend or partner’. The increasingly recognised importance of the role of the ‘informal carer’ is - in good part - due to the rising proportion of older people in the UK population. Not only do people live longer but many experience a number of chronic conditions; these require support from family members if the older person is to remain living in the community
Parthenolide eliminates leukemia-initiating cell populations and improves survival in xenografts of childhood acute lymphoblastic leukemia
Key Points
First report demonstrating in vivo elimination of multiple LIC populations from childhood ALL cases using animal models. In vivo models of leukemia are essential for drug evaluation studies.</jats:p
Lifting classes for the fixed point theory of -valued maps
The theory of lifting classes and the Reidemeister number of single-valued
maps of a finite polyhedron is extended to -valued maps by replacing
liftings to universal covering spaces by liftings with codomain an orbit
configuration space, a structure recently introduced by Xicot\'encatl. The
liftings of an -valued map split into self-maps of the universal
covering space of that we call lift-factors. An equivalence relation is
defined on the lift-factors of and the number of equivalence classes is the
Reidemeister number of . The fixed point classes of are the projections
of the fixed point sets of the lift-factors and are the same as those of
Schirmer. An equivalence relation is defined on the fundamental group of
such that the number of equivalence classes equals the Reidemeister number. We
prove that if is a manifold of dimension at least three, then algebraically
the orbit configuration space approach is the same as one utilizing the
universal covering space. The Jiang subgroup is extended to -valued maps as
a subgroup of the group of covering transformations of the orbit configuration
space and used to find conditions under which the Nielsen number of an
-valued map equals its Reidemeister number. If an -valued map splits into
single-valued maps, then its -valued Reidemeister number is the sum of
their Reidemeister numbers.Comment: near complete rewrite from previous versio
Effects of dietary fibre and the provision of a foraging substrate on the welfare of sows in different grouping systems
End of project reportThere are no clear guidelines on how best to meet the EU legislative requirement (Council Directive 2001/88/EC) that pregnant sows and gilts should be provided with sufficient amounts of bulky or high fibre diets and high energy food to satisfy hunger and the motivation to chew. Therefore the aim of this project was to investigate the effect of increasing dietary fibre levels and providing access to a foraging substrate on the welfare of sows housed in dynamic and static groups. To achieve this a review paper was compiled and three experiments were conducted.
The aim of the review paper was to assess the effectiveness of increasing dietary fibre levels on the welfare of pregnant sows. Previous research found that increasing dietary fibre levels decrease activity levels and the performance of stereotypic behaviour, and increase resting behaviour. However, high fibre diets do not appear to reduce aggression between group-housed pregnant sows. The research clearly showed that the effectiveness of high fibre diets is influenced by the source of fibre, with soluble fibres being more effective in reducing stereotypic behaviours than insoluble fibres. However the optimum fibrous ingredient, or combination of ingredients, and the optimum dietary inclusion rate for these ingredients remains unclear
Representations of linear dual rate system via single SISO LTI filter, conventional sampler and block sampler
In this brief, it is proved that a linear dual-rate system can be represented via a series cascade of: 1) a conventional expander, a single-input single-output (SISO) linear time-invariant (LTI) filter and a block decimator, or 2) a block expander, an SISO LTI filter and a conventional decimator. Hence, incompatible nonuniform filter banks could achieve perfect reconstruction via LTI filters, conventional samplers and block samplers without expanding the input-output dimension of a subsystem of linear dual-rate systems or converting the nonuniform filter banks to uniform filter banks. The main advantage of the proposed representations is to avoid complicated design of the circuit layout caused by connecting subsystems with large input-output dimension or a lot of subsystems togethe
Preserving Chile
The best way to preserve chile depends on how you plan to use it and your available storage space. Frozen or canned chile is best for chile rellenos and salsas. Stews can use frozen, canned or dried chile. Dried chile has minimal storage requirements and is light-weight for taking on camping trips. Pickled chiles can be used on a relish plate or as an ingredient in other dishes
Storage of Dry Milk
Publication gives instructions on how to properly store dry milk
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