4,415 research outputs found
The Philosophical Works: Concerning Human Understanding, A Dissertation on the Passions, Concerning the Principles of Morals, The Natural History of Religion; Essays withdrawn or unpublished
Ustilaginae of Iowa
Mycelium located in the tissues of the host, annual or perennial, spores produced from the mycelium at definite points on lines, stems or flowers, gelatinous at first, later pulverulent, in one species a hard, dark mass, smooth, echinulate or reticulated
Different colony-stimulating factors are detected by the "interleukin-3"-dependent cell lines FDC-Pl and 32D cl-23
Characterizations of Morse quasi-geodesics via superlinear divergence and sublinear contraction
We introduce and begin a systematic study of sublinearly contracting
projections. We give two characterizations of Morse quasi-geodesics in an
arbitrary geodesic metric space. One is that they are sublinearly contracting;
the other is that they have completely superlinear divergence. We give a
further characterization of sublinearly contracting projections in terms of
projections of geodesic segments.Comment: 24 pages, 5 figures. v2: 22 pages, 5 figures. Correction in proof of
Thm 7.1. Proof of Prop 4.2 revised for improved clarity. Other minor changes
per referee comments. To appear in Documenta Mathematic
Negative curvature in graphical small cancellation groups
We use the interplay between combinatorial and coarse geometric versions of
negative curvature to investigate the geometry of infinitely presented
graphical small cancellation groups. In particular, we characterize
their 'contracting geodesics', which should be thought of as the geodesics that
behave hyperbolically.
We show that every degree of contraction can be achieved by a geodesic in a
finitely generated group. We construct the first example of a finitely
generated group containing an element that is strongly contracting with
respect to one finite generating set of and not strongly contracting with
respect to another. In the case of classical small cancellation
groups we give complete characterizations of geodesics that are Morse and that
are strongly contracting.
We show that many graphical small cancellation groups contain
strongly contracting elements and, in particular, are growth tight. We
construct uncountably many quasi-isometry classes of finitely generated,
torsion-free groups in which every maximal cyclic subgroup is hyperbolically
embedded. These are the first examples of this kind that are not subgroups of
hyperbolic groups.
In the course of our analysis we show that if the defining graph of a
graphical small cancellation group has finite components, then the
elements of the group have translation lengths that are rational and bounded
away from zero.Comment: 40 pages, 14 figures, v2: improved introduction, updated statement of
Theorem 4.4, v3: new title (previously: "Contracting geodesics in infinitely
presented graphical small cancellation groups"), minor changes, to appear in
Groups, Geometry, and Dynamic
Disposition of precipitation: Supply and Demand for Water Use by New Tree Plantations
As the greatest rainwater users among all vegetative land covers, tree plantations have been employed strategically to mitigate salinity and water-logging problems. However, large-scale commercial tree plantations in high rainfall areas reduce fresh water inflows to river systems supporting downstream communities, agricultural industries and wetland environmental assets. A bio-economic model was used to estimate economic demand for water by future upstream plantations in a sub-catchment (the 2.8 million ha Macquarie valley in NSW) of the Murray-Darling Basin, Australia. Given four tree-product values, impacts were simulated under two settings: without and with the requirement that permanent water entitlements be purchased from downstream entitlement holders before establishing a tree plantation. Without this requirement, gains in economic surplus from expanding tree plantations exceeded economic losses by downstream irrigators, and stock and domestic water users, but resulted in reductions of up to 154 GL (gigalitres) in annual flows to wetland environments. With this requirement, smaller gains in upstream economic surplus, added to downstream gains, could total $330 million while preserving environmental flows. Extending downstream water markets to new upstream tree plantations, to equilibrate marginal values across water uses, helps ensure water entitlements are not diminished without compensation. Outcomes include better economic-efficiency, social-equity and environmental-sustainability.Environmental Economics and Policy, forest, environmental services, catchment, water sources, interception, entitlement, supply, demand, market, economic surplus, evapo-transpiration, urban water, irrigation, wetlands.,
House Directory, Kennebunk Village, 1933
A local directory of the individuals living at each street and house number in Kennebunk Village in 1933. A timeline of important dates in the history of the village are included as headers and footers on each page, 1603-1930. Also includes advertisements for area businesses
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