6,593 research outputs found
Cold-water coral reef frameworks, megafaunal communities and evidence for coral carbonate mounds on the Hatton Bank, north east Atlantic
Offshore banks and seamounts sustain diverse megafaunal communities, including framework reefs formed by cold-water corals. Few studies have quantified environmental effects on the alpha or beta diversity of these communities. We adopted an interdisciplinary approach that used historical geophysical data to identify topographic highs on Hatton Bank, which were surveyed visually. The resulting photographic data were used to examine relationships between megafaunal communities and macrohabitat, the latter defined into six categories (mud, sand, cobbles, coral rubble, coral framework, rock). The survey stations revealed considerable small-scale variability in macrohabitat from exposed Late Palaeocene lava flows to quiescent muddy habitats and coral-built carbonate mounds. The first reported evidence for coral carbonate mound development in UK waters is presented, which was most pronounced near present-day or former sites of topographic change, suggesting that local current acceleration favoured coral framework growth and mound initiation. Alpha diversity varied significantly across macrohabitats, but not between rock and coral rubble, or between smaller grain sized categories of cobbles, sand and mud. Community composition differed between most macrohabitats, and variation in beta diversity across Hatton Bank was largely explained by fine-scale substratum. Certain megafauna were clearly associated with particular macrohabitats, with stylasterid corals notably associated with cobble and rock habitats and coral habitats characterized by a diverse community of suspension-feeders. The visual surveys also produced novel images of deep-water megafauna including a new photographic record of the gorgonian coral Paragorgia arborea, a species not previously reported from Rockall Plateau. Further interdisciplinary studies are needed to interpret beta diversity across these and other environmental gradients on Hatton Bank. It is clear that efforts are also needed to improve our understanding of the genetic connectivity and biogeography of vulnerable deep-water ecosystems and to develop predictive models of their occurrence that can help inform future conservation measures
Effects of mechanically separated dairy cow slurry on grazing performance
No abstract available
An empirical study of student masculinities in an international school :towards a concept of 'third culture' masculinity
PhD ThesisThis research explores how masculinity is constructed by students in a European-based
international school. The study has two objectives. First, it examines the interplay
between the culture of the school and young men’s masculine identities and considers
how the style of masculinity influences and is influenced by the culture of the school.
Second, it explores this interplay by focusing on the institution, friendships and
relationships between students, and the curriculum. Methodologically the research is
underpinned by critical realism that recognises the mediated nature of reality, and is a
situation where constructivism cannot be ignored. The research adopts a mixed-methods
approach and considers both students and teachers. It draws upon questionnaires,
classroom observations, and focus groups. It also integrates semi-structured interviews
with a life histories method to capture young men’s gendered worlds. The research finds
that existing theoretical frames that have been used to understand young men’s
schooling experiences have limited analytical purchase in this context. As a
consequence, the thesis argues that in order to understand young men’s gendered
identities in this international school context requires a concept of ‘third culture’
masculinity. Constituted through respect, tolerance, diversity, tactical heterosexuality,
and female masculinity, ‘third culture’ masculinity becomes pivotal to how young men
gender themselves and others in the school. The thesis concludes by suggesting that the
negotiation of masculinity in this setting is a complex process of stabilisation and
fragmentation. Furthermore the thesis argues that existing educational research on
masculinity may benefit from understanding the formation of gender relations in an
international schooling context
Eternity and time in the theology of Karl Barth: an essay in dogmatic and philosophical theology
What has Karl Barth (considered by some to be the
greatest theologian of the twentieth century) to say about
the problem of time and thus eternity? Has what he wrote
much significance and how does it relate to both the history
of theology and philosophy as well as the modern era?The Enlightenment conditioned the thought of the
nineteenth century particularly as regards the possible
foundations of systematic theological thought. The
dialectic of antitheses (that is of eternity and time,
finite and infinite) was subsumed in the complex agnosticism
of Kant's transcendental idealism; resolved into overall
monistic synthesis by Hegel; broken apart in Trendelenburg's
critique; and, finally, reasserted in existential paradox
by Kierkegaard. Barth in his early work extended
Kierkegaard's precarious Christological Paradox to
destruction in a logical reductio thus making a new theological starting-point an imperative need.Barth posited this new beginning in the Word of God,
the threefold occurrence of which is grounded upon God and
thus the doctrine of God. The historicity of God's own
being in his trinitarian life constitutes the 'possibility'
of the 'reality' of revelation and as such contains within
itself an understanding of time. It is this which is
explicated in the main body of the thesis.God's being in the Trinity is being in act and the
temporal correlate of this fundamental reality is the
doctrine of eternity. Given the exclusive source of the
iv
knowledge of God in revelation, the 'full contemporaneity*
of the divine act assumes crucial significance because the
basis of the time of revelation is to be given in revelation
itself. The doctrine of *God's time* (eternity) posits the
active triumph of God's dynamic freedom in his unseparated
past, present and future over the division and loss of
'before' and 'after* in time. The theological impulse of
Barth's thought is expressed in the integration of God's
being and his perfections.The central doctrine of 'God's time' is exploited
throughout the Church Dogmatics in the doctrines of God,
election, incarnation, Christology, creation and of 'Man in
his Time*. The latter passage, usually seen as Barth's
definitive statement on time is in fact merely the overt
consummation of a theological theory of time which has been
used extensively. Barth's doctrine is a creative develop¬
ment of many strands to be found in the Christian tradition.
It contains, however, certain flaws and ambiguities which
reflect upon the whole theological structure of the Church
Dogmatics. Most serious of these is the linguistic
dialectic apparent in the negation of man's time and yet the
creative derivation of 'God's time' from a selective
analysis of common-sense concepts of time. This is the
logical Achilles' heel of the finest theological theory of
time in the history of the western tradition
Biodiversity of Spongosorites coralliophaga (Stephens, 1915) on coral rubble at two contrasting cold-water coral reef settings
The authors would like to thank Bill Richardson (Master), the crew of the RRS James Cook, Will Handley and the Holland-I ROV team. We also thank all the specialists in taxonomy that provided important help with identification of species: Professor Paul Tyler (ophiuroids), Dr. Tammy Horton (amphipods), Dr. Graham Oliver (bivalves), Dr. Rob van Soest (sponges), Susan Chambers, Peter Garwood, Sue Hamilton, Raimundo Blanco Pérez (polychaetes). Also we would like to thank Val Johnston (University of Aberdeen) for her contribution to cruise preparations and John Polanski (University of Aberdeen) for his help onboard the RRS James Cook. Special thanks to Dr. Alexios P. Lolas (University of Thessaly, Greece) for all the artwork. Funding for the JC073 cruise was provided by the Natural Environment Research Council (NERC) UK Ocean Acidification (UKOA) research programme’s Benthic Consortium project (NE/H017305/1 to JMR). JMR acknowledges support from Heriot-Watt University’s Environment and Climate Change theme. GK was funded by a Marine Alliance for Science and Technology for Scotland (MASTS) Ph.D. scholarship.Peer reviewedPublisher PD
Mosquito detection with low-cost smartphones: data acquisition for malaria research
Mosquitoes are a major vector for malaria, causing hundreds of thousands of
deaths in the developing world each year. Not only is the prevention of
mosquito bites of paramount importance to the reduction of malaria transmission
cases, but understanding in more forensic detail the interplay between malaria,
mosquito vectors, vegetation, standing water and human populations is crucial
to the deployment of more effective interventions. Typically the presence and
detection of malaria-vectoring mosquitoes is only quantified by hand-operated
insect traps or signified by the diagnosis of malaria. If we are to gather
timely, large-scale data to improve this situation, we need to automate the
process of mosquito detection and classification as much as possible. In this
paper, we present a candidate mobile sensing system that acts as both a
portable early warning device and an automatic acoustic data acquisition
pipeline to help fuel scientific inquiry and policy. The machine learning
algorithm that powers the mobile system achieves excellent off-line
multi-species detection performance while remaining computationally efficient.
Further, we have conducted preliminary live mosquito detection tests using
low-cost mobile phones and achieved promising results. The deployment of this
system for field usage in Southeast Asia and Africa is planned in the near
future. In order to accelerate processing of field recordings and labelling of
collected data, we employ a citizen science platform in conjunction with
automated methods, the former implemented using the Zooniverse platform,
allowing crowdsourcing on a grand scale.Comment: Presented at NIPS 2017 Workshop on Machine Learning for the
Developing Worl
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