We present a method by which torsion-free groups of automorphisms of a 2-dimensional hyperbolic building which act simply transitively on the vertex set can be constructed, and prove that any such group can be obtained by this construction. The method produces groups defined by finite presentations with strong small cancellation...
Climate and terrestrial vegetation have had mutual feedbacks for nearly five hundred million years, yet both are now departing from recent historical norms, with uncertain implications for forest ecosystems. This dissertation outlines the current and potential future climate responses of lichen and bryophyte communities in the United States as part...
A thermal beam of lithium atoms excited to high Rydberg states
by pulsed electron impact has been studied by time-of-flight analysis.
Near the end of a 35-cm field-free flight path, the excited atoms pass
through a pair of electric field plates before entering an excited-atom
detector. Electric field ionization was...
With rapidly rising health care expenditures, health care cost containment has
become a major issue facing this nation. A phenomenal growth in worksite health
promotion has occurred with the recognition that these programs have the potential to
reduce these costs. However, to be effective as a cost containment strategy, health...
We investigate the optimal harvesting strategies for McKendrick type population models. Models of this type endow the population with a continuous age structure. They consist of a partial differential equation with a boundary condition which involves an integral of the solution. We study two problems, the first concerns the yield...
Red alder (Alnus rubra Bong.) seedlings were grown at three initial spacings (8 x 8 cm, 4 x 4 cm, and 2 x 2 cm) and on two soil types
(forest soil and river loam) under greenhouse and lath house conditions for 525 growing days. There were seven harvest dates,...
Introduction: For people with bleeding disorders pain is often a daily challenge. Despite many advancements to the standard of care in recent decades, including more effective treatments, and more effective medication schedules, pain remains highly prevalent in people with bleeding disorders: existing pain treatment practices have not adequately addressed pain...
The genetic control of changes in unselected traits of
Wrolstad Medium White turkeys divergently selected for
semen ejaculate volumes (SEV) for 16 generations (G) was
studied. Genetic parameters were estimated in G 10 to 14
for embryonic mortality (EM), the incidence of pipped eggs,
and for total plasma cholesterol (PC)...