© 2007 Association médicale canadienne T surgeon’s knot is a well-established knot in surgical practice, known to provide unsurpassed grip and security for the tissue tied. It is particularly useful with slippery monofilament suture materials. Traditional tying of the surgeon’s knot involves a cumbersome technique of repeating throws to complete the double loops of each hitch. We describe a 2-h...

The normal right ventricular pressure-volume relation was studied by recording biplane right ventriculograms with simultaneous high fidelity pressure recordings in 10 adults found to have normal coronary arteries and haemodynamic function at diagnostic cardiac catheterisation. Right ventricular volume was measured frame by frame from digitised ventriculograms by a modification of Simpson's rule...

The ability to control the morphologies of biomolecular aggregates is a central objective in the study of self-assembly processes. The development of predictive models offers the surest route for gaining such control. Under the right conditions, proteins will self-assemble into fibers that may rearrange themselves even further to form diverse structures, including the formation of closed loops....

We discuss in this paper combinatorial aspects of boundary loop models, that is models of selfavoiding loops on a strip where loops get different weights depending on whether they touch the left, the right, both or no boundary. These models are described algebraically by a generalization of the Temperley-Lieb algebra, dubbed the two-boundary TL algebra. We give results for the dimensions of TL ...

A 95-year-old woman with a virgin abdomen presented to the Emergency Department (ED) with a 1 week history of vomiting, absolute constipation and generalised abdominal pain. Physical examination revealed tender abdominal distension with hyperactive bowel sounds and no hernias. Abdominal plain film radiograph (PFR) showed dilated small bowel loops without an obvious transition point or a radiolo...

UNLABELLED The goal of this cardiopulmonary bypass (CPB) quality improvement initiative was to maximize hemoglobin nadir concentration by minimizing hemodilution and, in turn, eliminating allogeneic blood product transfusion. The effects of transitioning from "one-size-fits-all" to "right-sized" oxygenators, reservoirs, and arterial-venous tubing loops were evaluated through a 2-year retrospect...

Various alternative definitions for the nonlinear H2-, L2and ν-gap metrics are studied. The concept of β-conjugacy and multiplicative homogeneity are introduced to relate the metrics to each other and to compare the stability margins of nonlinear feedback loops expressed in terms of the norms of complementary parallel projections. Left and right representations for the graph of a nonlinear syst...

Cardiac syndrome X (CSX) is a clinical condition, characterized by angina, positive stress test and negative coronary angiography. Myocardial ischemia is suggested to influence the ischemic changes in the electrocardiogram (ECG), observed during stress test. The aim of this study, is to obtain CSX patterns of the high-resolution vectorcardiographic (VCG) loops in the horizontal (H), frontal (F)...

In this paper we want to show, that the finite impulse response quadratic mirror filters (QMF) associated to a tower of grids Γ ⊂ H = ZZ can be identified with a right coset of the subgroup Fix(TΓ⊥ ,Map(T n → U(N) : poly) of the group of polynomial loops Map(T → U(N) : poly) with N = |H/Γ |. The QMF with some vanishing moments can be identified with cosets of subgroups. The problem to parameter...

Scattering of zero branes off the fixed point in R/Z2, as described by a super-quantum mechanics with eight supercharges, displays some novel effects relevant to Matrix theory in non-compact backgrounds. The leading long distance behaviour of the moduli space metric receives no correction at one loop in Matrix theory, but does receive a correction at two loops. There are no contributions at hig...