42 research outputs found
Dark Matter in the Milky Way's Dwarf Spheroidal Satellites
The Milky Way's dwarf spheroidal satellites include the nearest, smallest and
least luminous galaxies known. They also exhibit the largest discrepancies
between dynamical and luminous masses. This article reviews the development of
empirical constraints on the structure and kinematics of dSph stellar
populations and discusses how this phenomenology translates into constraints on
the amount and distribution of dark matter within dSphs. Some implications for
cosmology and the particle nature of dark matter are discussed, and some
topics/questions for future study are identified.Comment: A version with full-resolution figures is available at
http://www.cfa.harvard.edu/~mwalker/mwdsph_review.pdf; 70 pages, 22 figures;
invited review article to be published in Vol. 5 of the book "Planets, Stars,
and Stellar Systems", published by Springe
Transmembrane signalling in eukaryotes: a comparison between higher and lower eukaryotes
Awareness, concern and willingness to adopt biosecure behaviours: public perceptions of invasive tree pests and pathogens in the UK
The growing incidence of invasive tree
pest and disease outbreaks is recognised as an
increasing threat to ecosystem services and human
wellbeing. Linked to global trade, human movement
and climate change, a number of outbreaks have
attracted high public and media attention. However,
there is surprisingly little evidence characterising the
nature of public attentiveness to these events, nor how
publics might respond to evolving outbreaks and the
management actions taken. This paper presents findings
from an online questionnaire involving 1334
respondents nationally-representative of the British
public to assess awareness, concern and willingness to
adopt biosecure behaviours. Despite revealing low
levels of awareness and knowledge, the results indicate
that the British public is concerned about the
health of trees, forests and woodlands and is moderately
willing to adopt biosecure behaviours. A key
finding is that membership of environmental organisations
and strong place identity are likely to engender
higher awareness and levels of concern about tree
pests and diseases. Further, those who visit woodlands
regularly are likely to be more aware than non-visitors,
and gardeners are more likely to be concerned than
non-gardeners. Women, older respondents, those with
strong place identity and dependence, members of
environmental organisations, woodland visitors and
gardeners were most likely to express a willingness to
adopt biosecure behaviours. A comparison with findings
from a survey conducted by the authors 3 years
previously shows a decline over time in awareness,
concern and willingness