1,169 research outputs found
Altering poverty dynamics with index insurance: northern Kenyaâs HSNP+
Abstract not available
Insuring against drought-related livestock mortality: Piloting index-based livestock insurance in northern Kenya
Climate related shocks are among the leading cause of
production and efficiency losses in smallholder crop and
livestock production in rural Africa. Consequently, the
identification of tools to help manage the risks associated
with climactic extremities is increasingly considered to be
among the key pillars of any agenda to enhance agricultural
growth and welfare in rural Africa. This paper describes the
application of a promising innovation in insurance design â
index-based insurance â that seeks to bring the benefits of
formal insurance to help manage the weather-related risks
faced by rural crop and livestock producers in low-income
countries. In particular, we highlight the research and
development agenda of a comprehensive effort to design
commercially viable index based livestock insurance aimed at
protecting the pastoral populations of northern Kenya from the
considerable drought-related livestock mortality risk that they
face. Detailing the conditions that make the pastoral economy
in northern Kenya an ideal candidate for the provision of indexbased
insurance products, the paper describes the contract
design, defines its structure, offers analysis that indicates a
high likelihood of commercial sustainability among the target
market and describes the process of implementation leading up
to the launch of a pilot in Marsabit District of northern Kenya in
early 2010
Insuring against droughtârelated livestock mortality: Piloting index based livestock insurance in northern Kenya
Climate related shocks are among the leading cause of production and efficiency losses in smallholder crop and livestock production in rural Africa. Consequently, the identification of tools to help manage the risks associated with climactic extremities is increasingly considered to be amongst the key pillars of any agenda to enhance agricultural growth and welfare in rural Africa. This paper describes the application of a promising innovation in insurance design â indexâbased insurance â that seeks to bring the benefits of formal insurance to help manage the weatherârelated risks faced by rural crop and livestock producers in lowâincome countries. In particular, we highlight the research and development agenda of a comprehensive effort to design commercially viable indexâbased livestock insurance aimed at protecting the pastoral populations of Northern Kenya from the considerable droughtârelated livestock mortality risk that they face. Detailing the conditions that make the pastoral economy in Northern Kenya an ideal candidate for the provision of indexâbased insurance products, the paper describes the contract design, defines its structure, offers analysis that indicates a high likelihood of commercial sustainability among the target market and describes the process of implementation leading up to the launch of a pilot in Marsabit district of Northern Kenya in early 2010
Nonleptonic Cabibbo Favoured -Decays and -Asymmetries for Charmed Final Hadron States in Isgur and Wise Theory
The Cabibbo allowed non-leptonic -decays in two hadrons are studied,
within the factorization hypothesis, in the framework of Isgur and Wise theory
for the matrix elements of the weak currents. The
symmetry relates to currents, which
have been measured in the semileptonic strange decays of charmed particles. By
assuming colour screening and allowing for invariant contributions from
the annihilation terms with charmed final states one is able to comply with the
present experimental knowledge.\\ The violating asymmetries in neutral
decays are given for charmed final states in terms of the angles. With
the central values found for the annihilation parameters there is a destructive
(constructive) interference between the direct and annihilation terms in the
Cabibbo allowed (doubly forbidden) amplitudes for the decays into
and so that they may be of the same order.
This would imply large asymmetries, for which however our present knowledge on
the amplitudes does not allow to predict even their sign.\\ We have better
confidence in our predictions for the charged final states than the neutral
ones and can draw the conclusion that the detection of the corresponding
asymmetries requires, at least, tagged neutral -particles.Comment: CERNTEX, 17 pages, DSF-92/23, INFN-NA-IV-92/2
Forgotten fatalities: British military, mining, and maritime accidents since 1900.
Background
Comparative long-term trends in fatal accident rates in the UKâs most hazardous occupations have not been reported.
Aims
To compare trends in fatal accident rates in six of the most hazardous occupations (the three armed forces, merchant shipping, sea fishing and coal mining) and the general British workforce during peacetime years since 1900.
Methods
Examinations of annual mortality reports, returns, inquiry files and statistics. The main outcome measure was the fatal accident rate per 100 000 population employed.
Results
These six occupations accounted for ~40% of all fatal accidents in the British workforce. Fatal accident rates were highest in merchant shipping to 1914 (400â600 per 100 000) and in the Royal Air Force and sea fishing by the early 1920s (around 300 per 100 000). Since the 1950s sea fishing has remained the most hazardous occupation (50â200). Widespread reductions in fatal accident rates for each occupation have been greatest in recent years in the three armed forces and merchant shipping. Compared with the general workforce, relative risks of fatalities have increased in recent decades in all these occupations except shipping.
Conclusions
All six occupations still have high fatal accident rates. The greatly increased fatalities in sea fishing generally and in the Royal Air Force during its early years reflect, for different reasons, cultures of extreme risk-taking in these two sectors. Reductions in fatality rates in the armed forces over the last 20 years are due largely to decreases in land transport accidents
Wavy Strings: Black or Bright?
Recent developments in string theory have brought forth a considerable
interest in time-dependent hair on extended objects. This novel new hair is
typically characterized by a wave profile along the horizon and angular
momentum quantum numbers in the transverse space. In this work, we
present an extensive treatment of such oscillating black objects, focusing on
their geometric properties. We first give a theorem of purely geometric nature,
stating that such wavy hair cannot be detected by any scalar invariant built
out of the curvature and/or matter fields. However, we show that the tidal
forces detected by an infalling observer diverge at the `horizon' of a black
string superposed with a vibration in any mode with . The same
argument applied to longitudinal () waves detects only finite tidal
forces. We also provide an example with a manifestly smooth metric, proving
that at least a certain class of these longitudinal waves have regular
horizons.Comment: 45 pages, latex, no figure
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