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Search Results: 1 - 10 of 203119 matches for " P.; Thompson "
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Leveraging learning to improve disaster management outcomes
Denise D. P. Thompson
International Journal of Disaster Risk Science , 2012, DOI: 10.1007/s13753-012-0020-4
Abstract: Disaster management agencies should be exemplars of learning given the volatility of their operating environment. However, there are cognitive, social, and organizational barriers that prevent these organizations from learning. The purpose of this article is to use the Caribbean Disaster and Emergency Management Agency (CDEMA) as an example of an organization that achieves double-loop learning in spite of known barriers. This research shows significant learning variations in the CDEMA organization from the regional to the national level. The results demonstrate that the CDEMA Coordinating Unit and a few national member agencies achieve double-loop learning, while the opposite is true for many national disaster offices. Analysis of this variation is one contribution to the disaster management and organizational learning literature. The article also suggests that organizational culture is an important precursor to learning and adds a much needed case example to the management and learning literature. The study ends with a proposal for future research in the area of disaster management, culture and learning, and propositions for national disaster offices to consider in order to enhance double-loop learning.
Osteitis of the apex of the third phalanx following foot trimming in a dairy cow : case report
P.N. Thompson
Journal of the South African Veterinary Association , 2012, DOI: 10.4102/jsava.v69i1.805
Abstract: An adult Ayrshire cow was presented with bilateral hind-limb lameness 5 weeks after routine claw trimming. Examination under intravenous regional anaesthesia revealed ulceration of the sole at the toe of both the right lateral and left medial claws of the hind limbs. Radiographic examination showed osteolysis and pathological fractures of the 3rd phalanx of both affected claws. Wooden blocks were fixed to the 2 healthy claws and the bone fragments were removed using a different technique for each claw. Full recovery followed within 11 weeks. The aetiological factors and treatment options for this condition, which was considered to be caused primarily by incorrect claw trimming, are discussed.
Modeling Wildfire Incident Complexity Dynamics
Matthew P. Thompson
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0063297
Abstract: Wildfire management in the United States and elsewhere is challenged by substantial uncertainty regarding the location and timing of fire events, the socioeconomic and ecological consequences of these events, and the costs of suppression. Escalating U.S. Forest Service suppression expenditures is of particular concern at a time of fiscal austerity as swelling fire management budgets lead to decreases for non-fire programs, and as the likelihood of disruptive within-season borrowing potentially increases. Thus there is a strong interest in better understanding factors influencing suppression decisions and in turn their influence on suppression costs. As a step in that direction, this paper presents a probabilistic analysis of geographic and temporal variation in incident management team response to wildfires. The specific focus is incident complexity dynamics through time for fires managed by the U.S. Forest Service. The modeling framework is based on the recognition that large wildfire management entails recurrent decisions across time in response to changing conditions, which can be represented as a stochastic dynamic system. Daily incident complexity dynamics are modeled according to a first-order Markov chain, with containment represented as an absorbing state. A statistically significant difference in complexity dynamics between Forest Service Regions is demonstrated. Incident complexity probability transition matrices and expected times until containment are presented at national and regional levels. Results of this analysis can help improve understanding of geographic variation in incident management and associated cost structures, and can be incorporated into future analyses examining the economic efficiency of wildfire management.
Arbitrary Sectioning of Angles in Taxicab Geometry
Kevin P. Thompson
Mathematics , 2011,
Abstract: A construction to arbitrarily section a taxicab angle into an equal number of angles in (pure) taxicab geometry is presented.
Taxicab Triangle Incircles and Circumcircles
Kevin P. Thompson
Mathematics , 2011,
Abstract: Inscribed angles are investigated in taxicab geometry with application to the existence and uniqueness of inscribed and circumscribed taxicab circles of triangles.
An Alternative Computational Approach to the Collatz Conjecture
Kevin P. Thompson
Mathematics , 2011,
Abstract: An alternative computational approach to the Collatz (3n+1) conjecture is presented that may be theoretically capable of confirming the conjecture.
The Nature of Length, Area, and Volume in Taxicab Geometry
Kevin P. Thompson
Mathematics , 2011,
Abstract: While the concept of straight-line length is well understood in taxicab geometry, little research has been done into the length of curves or the nature of area and volume in this geometry. This paper sets forth a comprehensive view of the basic dimensional measures in taxicab geometry.
Taxicab Calculus: Trig Derivatives
Kevin P. Thompson
Mathematics , 2012,
Abstract: The set of trigonometric functions in taxicab geometry is completed and derivatives of all of the taxicab trigonometric functions are explored.
Taxicab Butterflies
Kevin P. Thompson
Mathematics , 2015,
Abstract: The Butterfly Theorem is explored in Taxicab Geometry.
Radiation Exposure and Cancer Incidence (1990 to 2008) around Nuclear Power Plants in Ontario, Canada  [PDF]
R. Lane, E. Dagher, J. Burtt, P. A. Thompson
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.49104

Radiation doses and cancer incidence among the population living within 25 km of three nuclear power plants (NPPs) in Ontario, Canada were investigated for the period 1985 to 2008 for radiation exposure and 1990 to 2008 for cancer incidence. This study design provided at least a five-year latency period between potential radiation exposure and cancer incidence. Around the NPPs, the incidence of childhood cancers, leukemia and non-Hodgkin lymphoma, in young children (aged 0 - 4) was lower than the general Ontario population, but not statistically so. Cancer incidence in children aged 0 - 14 was similar to the Ontario population. Overall, for all ages there was no consistent pattern of cancer incidence (all cancers combined and radio-sensitive cancers) across the population living within 25 km of the three NPPs. Some types of cancers were statistically higher than expected, others were statistically lower than expected, and others were similar to the general Ontario population. Although variations in all cancers combined and radiosensitive cancers were found in this study, the pattern was found to be within the natural variation of cancer in Ontario. During the period 1985 to 2000 (Pickering

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