36,764 research outputs found
Research on Use of Computers for Handling Advanced Systems Human Factors Task Data Quarterly Status Report, 1 Oct. - 31 Dec. 1965
Computer use for handling advanced systems human factors task dat
Basic Human Factors Task Data Relationships in Aerospace System Design and Development Final Report, Aug. - Dec. 1965
Basic human factors task data relationships in aerospace system design and developmen
The role of surgery in the treatment of older women with breast cancer
A significant proportion of women diagnosed with breast cancer are over the age of 70 years and there is evidence that these patients frequently do not receive standard treatments, including surgical procedures and adjuvant therapies, which would be routine practice in younger age groups. The factors underlying this may include the physiological effects of ageing, differences in the biology and stage of the tumour at presentation, patient co-morbidities and patient and clinician preferences. The interaction of all these factors needs to be considered when individualising treatment plans for patients. For some patients this will need to be undertaken in the context of an extended multidisciplinary team setting with additional input from geriatricians, in addition to surgeons and oncologists, in defining a treatment plan. Little is known about the preferences of older patients in their choice of surgical treatment for breast cancer and further research is required to increase the evidence base for the rational management of older women with breast cancer
Stencils and problem partitionings: Their influence on the performance of multiple processor systems
Given a discretization stencil, partitioning the problem domain is an important first step for the efficient solution of partial differential equations on multiple processor systems. Partitions are derived that minimize interprocessor communication when the number of processors is known a priori and each domain partition is assigned to a different processor. This partitioning technique uses the stencil structure to select appropriate partition shapes. For square problem domains, it is shown that non-standard partitions (e.g., hexagons) are frequently preferable to the standard square partitions for a variety of commonly used stencils. This investigation is concluded with a formalization of the relationship between partition shape, stencil structure, and architecture, allowing selection of optimal partitions for a variety of parallel systems
Who gains when workers train? Training and corporate productivity in a panel of British industries
There is a vast empirical literature of the effects of training on wages that are taken as
an indirect measure of productivity. This paper is part of a smaller literature on the
effects of training on direct measures of industrial productivity. We analyse a panel of
British industries between 1983 and 1996. Training information (and other individual
productivity indicators such as education and experience) is derived from a question that
has been asked consistently over time in the Labour Force Survey. This is combined
with complementary industry-level data sources on value added, wages, labour and
capital. We use a variety of panel data techniques (including system GMM) to argue that
training significantly boosts productivity. The existing literature has underestimated the
full effects of training for two reasons. First, it has tended to treat training as exogenous
whereas in reality firms may choose to re-allocate workers to training when demand (and
therefore productivity) is low. Secondly, our estimates of the effects of training on wages
are about half the size of the effects on industrial productivity. It is misleading to ignore
the pay-off firms take in higher profits from training. The effects are economically large.
For example, raising the proportion of workers trained in an industry by 5 percentage
points (say from the average of 10% to 15%) is associated with a 4 per cent increase in
value added per worker and a 1.6 per cent increase in wages
AgRISTARS: Foreign commodity production forecasting. Country summary report, Australia
Australia is one of the world's major growers and exporters of wheat and as such is one of the countries of interest in the AgRISTARS program which endeavors to develop technology to estimate crop production using aerospace remote sensing. A compilation of geographic, political, and agricultural information on Australia is presented. Also included is a summary of the aerospace remote sensing, meteorological, and ground-observed data which were collected with respect to Australia, as well as a summary of contacts between AgRISTARS and Australia personnel
Sharp eigenvalue enclosures for the perturbed angular Kerr-Newman Dirac operator
A certified strategy for determining sharp intervals of enclosure for the
eigenvalues of matrix differential operators with singular coefficients is
examined. The strategy relies on computing the second order spectrum relative
to subspaces of continuous piecewise linear functions. For smooth perturbations
of the angular Kerr-Newman Dirac operator, explicit rates of convergence due to
regularity of the eigenfunctions are established. Existing benchmarks are
validated and sharpened by several orders of magnitude in the unperturbed
setting.Comment: 27 pages, 2 figures, 5 tables. Some errors fixe
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