3,963 research outputs found
Centurialâmillenial iceârafted debris pulses from ablating marine ice sheets
We use an iceâsheet model to show that (i) margins of marine iceâsheets can be expected to be frozen to the bed, except where iceâstreams discharge; (ii) 20â50km retreats induced by ablation rates of 2 m/yr provide sufficient debris flux through the grounding line to produce large sedimentation events. Such ablation would reduce iceâshelf extent markedly, permitting debris to reach the calving front and be transported by icebergs leading to iceârafted debris (IRD) events. Ice shelf breakâup takes around a century (start of IRD pulse), while the creation of warmâbased conditions (end of IRD pulse) due to upwards motion of warm ice takes a few more centuries. Such IRD pulses are unlikely to explain Heinrich events, which are associated with relatively cold periods within glaciations. Surges are not necessary conditions for the production of large IRD events
Family Foundations Giving Trends 2014 Report
This is the sixth annual edition of Family Foundation Giving Trends. It provides an uptade on annual charitable spending by the top 100 family foundations - a key indicator of the contribution of UK philanthropists, past and present. The report has been revised as part of a new series of foundation briefings published by ACF and CGAP with support from Pears Foundation. Foundations may be funded through families, individuals, family businesses, companies, government, or fundraising, and this report specifically focuses on family foundations
Supply Chain Management in the Hospitality Industry: A research agenda
Supply Chain Management is at the heart of competitive advantage for any organisation. Without Supply Chains, the Hospitality Industry would quickly grind to a halt. There would be no fruit or vegetables in our restaurants, no beer or wine in our bars and no beds or toilets in our hotels. There would be no recycling of glass or the disposal of food products. There would be no customers. Given the importance of Supply Chains to the Hospitality Industry it is perhaps surprising that so little is published about Supply Chains and how Supply Chains can be managed. The aim of this working paper is to define SCM and establish an agenda for undertaking research into this important but neglected topic
A model for the onset of oscillations near the stopping angle in an inclined granular flow
We propose an explanation for the onset of oscillations seen in numerical
simulations of dense, inclined flows of inelastic, frictional spheres. It is
based on a phase transition between disordered and ordered collisional states
that may be interrupted by the formation of force chains. Low frequency
oscillations between ordered and disordered states take place over weakly bumpy
bases; higher-frequency oscillations over strongly bumpy bases involve the
formation of particle chains that extend to the base and interrupt the phase
change. The predicted frequency and amplitude of the oscillations induced by
the unstable part of the equation of state are similar to those seen in the
simulations and they depend upon the contact stiffness in the same way. Such
oscillations could be the source of sound produced by flowing sand
Naturalness of the Coleman-Glashow Mass Relation in the 1/N_c Expansion: an Update
A new measurement of the Xi^0 mass verifies the accuracy of the
Coleman-Glashow relation at the level predicted by the 1/N_c expansion. Values
for other baryon isospin mass splittings are updated, and continue to agree
with the 1/N_c hierarchy.Comment: 6 pages, revte
Adaptive management of Ramsar wetlands
Abstract
The Macquarie Marshes are one of Australiaâs iconic wetlands, recognised for their international importance, providing habitat for some of the continentâs more important waterbird breeding sites as well as complex and extensive flood-dependent vegetation communities. Part of the area is recognised as a wetland of international importance, under the Ramsar Convention. River regulation has affected their resilience, which may increase with climate change. Counteracting these impacts, the increased amount of environmental flow provided to the wetland through the buy-back and increased wildlife allocation have redressed some of the impacts of river regulation.
This project assists in the development of an adaptive management framework for this Ramsar-listed wetland. It brings together current management and available science to provide an informed hierarchy of objectives that incorporates climate change adaptation and assists transparent management. The project adopts a generic approach allowing the framework to be transferred to other wetlands, including Ramsar-listed wetlands, supplied by rivers ranging from highly regulated to free flowing.
The integration of management with science allows key indicators to be monitored that will inform management and promote increasingly informed decisions. The project involved a multi-disciplinary team of scientists and managers working on one of the more difficult challenges for Australia, exacerbated by increasing impacts of climate change on flows and inundation patterns
The Governance and Financial Management of Endowed Charitable Foundations
This report into the governance and financial management of endowed charitable foundations -- charities that fund their activities mostly from investments -- is the first research of its kind into this sector. It examines the common principles for the management of charitable foundations and, through interviews and case studies, shows the ways different organisations have implemented them to get the best value for their charitable aims. The report identifies that there are 900 endowed foundations in England and Wales with income over ÂŁ500k. With collective assets of ÂŁ48.5bn -- nearly half the Voluntary Sector assets of the UK as a whole - they are together responsible for ÂŁ2.3bn charitable spending each year
Baryon Masses at Second Order in Chiral Perturbation Theory
We analyze the baryon mass differences up to second order in chiral
perturbation theory, including the effects of decuplet intermediate states. We
show that the Coleman--Glashow relation has computable corrections of order
. These corrections are numerically small, and in agreement
with the data. We also show that corrections to the equal-spacing rule
are dominated by electromagnetic contributions, and that the Gell-Mann--Okubo
formula has non-analytic corrections of order which cannot be
computed from known matrix elements. We also show that the baryon masses cannot
be used to extract model-independent information about the current quark
masses.Comment: 11 pages, 1 uu-encoded figure, LBL-34779, UCB-PTH-93/2
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