34 research outputs found
Attentive Learning of Sequential Handwriting Movements: A Neural Network Model
Defense Advanced research Projects Agency and the Office of Naval Research (N00014-95-1-0409, N00014-92-J-1309); National Science Foundation (IRI-97-20333); National Institutes of Health (I-R29-DC02952-01)
The aggregate economic benefits of the national cultivar trials for maize in South Africa with specific reference to the Highveld region
The South African maize sector has been revolutionised from a system of
production with low use of modern technologies to a leading maize producer in
the African continent. That transformation is in part attributable to South Africa’s
investment in the national maize cultivar trials, which have facilitated the adoption
and use of maize cultivars that are highly adapted to commercial farmer localities,
causing considerable gains in yields. The economic value of the public investment
in the trials remains unknown. This study uses experimental yields spanning 1977
- 2012 to attribute the influence of the national maize cultivar trials to maize yield
improvement on farmer localities in the Highveld region of South Africa. Using
attribution methods, the study estimates that 24.3 kg per hectare of extra maize
yields accrued to commercial maize producers because of the national maize trials.
The economic value of these investments was found to be R1.4billion (in 2012
currency values). The study estimates that South Africa received R37 of benefit for
every rand invested by the Agricultural Research Council (ARC) in the trials.http://www.tandfonline.com/loi/ragr202016-09-30hb201
Inclusive D* Production in Two-Photon Collisions at LEP
Inclusive D^{*+-} production in two-photon collisions is studied with the L3
detector at LEP, using 683 pb^{-1} of data collected at centre-of-mass energies
from 183 to 208 GeV. Differential cross sections are determined as functions of
the transverse momentum and pseudorapidity of the D^{*+-} mesons in the
kinematic region 1 GeV < P_T < 12 GeV and |eta| < 1.4. The cross sections
sigma(e^+e^- -> e^+e^-D^{*+-}X) in this kinematical region is measured and the
sigma(e^+e^- -> e^+e^- cc{bar}X) cross section is derived. The measurements are
compared with next-to-leading order perturbative QCD calculations
Considerations for determining research priorities: learning cycles and impact pathways
Agricultural researchers identify and apply new science, novel approaches and innovations that could generate research breakthroughs and improve impacts to support the development of the agricultural sector. During the past few decades, there has been an expansion of the research agenda along the entire research-fordevelopment continuum, with farm- and policy-level implications. The goals and objectives of research have broadened from primarily food production to include sustainable resource management, equity, gender, health, and environmental concern
Measurements of the Cross Sections for Open Charm and Beauty Production in gamma gamma Collisions at root(s)=189-202 GeV
The production of c and b quarks in gamma-gamma collisions is studied with
the L3 detector at LEP with 410 pb^-1 of data, collected at centre-of-mass
energies from 189 GeV to 202 GeV. Hadronic final states containing c and b
quarks are identified by detecting electrons or muons from their semileptonic
decays. The cross sections sigma(e+e- -> e+e- c c~ X) and sigma(e+e- -> e+e- b
b~ X) are measured and compared to next-to-leading order perturbative QCD
calculations. The cross section of b production is measured in gamma-gamma
collisions for the first time. It is in excess of the QCD prediction by a
factor of three
Beyond semi-dwarf wheat yield increases: impacts on the Australian wheat industry of on-going spillovers from the International Maize and Wheat Improvement Center
Wheat genetic materials developed from research at the International Maize and Wheat Improvement Center (CIMMYT) in Mexico for developing countries have provided spillover benefits to Australia. Varieties developed from those genetic materials have resulted in yield increases in Australia. While the initial impact came through the introduction of higher-yielding semi-dwarf wheat crops, those impacts have continued in the post-semidwarf period. CIMMYT's success in developing countries has also reduced the world price for wheat. While the lower prices affect returns in Australia, the increased yields in Australia from the CIMMYT spillovers from both the semi-dwarfs and the post-semidwarf phases have provided benefits to Australia averaging A$30 million per year. Copyright 2007 The Author Journal compilation 2007 Australian Agricultural and Resource Economics Society Inc. .