Principal Investigators: Jean-Michel DeVink, University of Saskatchewan, 115 Perimeter Rd, Saskatoon, Saskatchewan, S7N 0X4, [email protected] Dr. Stuart Slattery, Ducks Unlimited Canada, Institute for Wetland and Waterfowl Research, Box 1160, Stonewall, Manitoba, R0C 2Z0, [email protected] Dr. Bob Clark, Canadian Wildlife Service, 115 Perimeter Rd, Saskatoon, Saskatchewan, S7N 0X4,...

We discuss the asymptotic behaviour of models of lattice polygons, mainly on the square lattice. In particular, we focus on limiting area laws in the uniform perimeter ensemble where, for fixed perimeter, each polygon of a given area occurs with the same probability. We relate limit distributions to the scaling behaviour of the associated perimeter and area generating functions, thereby providi...

infiltration in furrow irrigation is 2-d which depends on both time and surface characteristics at which infiltration occurs. however, in many furrow irrigation models, infiltration is determined as a function of infiltration time opportunity, assuming the variation of weted perimeter is low along furrow. in order to compare the proposed asumptions, two zero-inertia furrow irrigation models wer...

Partial gastric diverticula are rare and clinically insignificant, but because experience is limited, they are liable to cause diagnostic confusion. This report describes the radiological and endoscopic appearances of partial gastric diverticula.

PURPOSE To compare the preferential hyperacuity perimeter (Preview PHP; Carl Zeiss Meditec, Dublin, CA) with the original Amsler grid in the detection of choroidal neovascularization (CNV) in patients with age-related macular degeneration (AMD). METHODS Patients were classified into groups, based on the severity of the age-related macular degeneration and underwent preferential hyperacuity pe...

Planar electrodes are used in epidural spinal cord stimulation and epidural cortical stimulation. Electrode geometry is one approach to increase the efficiency of neural stimulation and reduce the power required to produce the level of activation required for clinical efficacy. Our hypothesis was that electrode geometries that increased the variation of current density on the electrode surface ...

A pattern database abstraction (PDB) is a heuristic function in a form of a lookup table. A PDB stores the cost of optimal solutions for instances of abstract problems (subproblems). These costs are used as admissible heuristics for the original problem. Perimeter search (PS) is a form of bidirectional search. First, a breadth-first search is performed backwards from the goal state. Then, a for...

We show how to compute the smallest rectangle that can enclose any polygon, from a given set of polygons, in nearly linear time; we also present a PTAS for the problem, as well as a linear-time algorithm for the case when the polygons are rectangles themselves. We prove that finding a smallest convex polygon that encloses any of the given polygons is NP-hard, and give a PTAS for minimizing the ...

What is the minimum perimeter of a convex lattice n-gon? This question was answered by Jarńık in 1926. We solve the same question in the case when perimeter is measured by a (not necessarily symmetric) norm.

In this paper we consider an isoperimetric inequality for the free perimeter of a planar shape inside a rectangular domain, the free perimeter being the length of the shape boundary that does not touch the border of the domain.