Objective: The study objectives were to identify factors affecting extension ladders' angular positioning and evaluate the effectiveness of two anthropometric positioning methods. Background: A leading cause for extension ladder fall incidents is a slide-out event, usually related to suboptimal ladder inclination. An improved ladder positioning method or procedure could reduce the risk of ladde...

Building on the work of Terwilliger, we find the structure of nonthin irreducible T -modules of endpoint 1 for Pand Q-polynomial association schemes with classical parameters. The isomorphism class of such a given module is determined by the intersection numbers of the scheme and one additional parameter which must be an eigenvalue for the first subconstituent graph. We show that these modules ...

Let G be an infinite 4-connected planar graph such that the deletion of any finite set of vertices from G results in exactly one infinite component. Dean et al proved that either G admits a radial net or a special subgraph of G admits a ladder net, and they used these nets to show that G contains a spanning 1-way infinite path. In this paper, we show that if G admits a radial net, then G also c...

It is shown that solvable mixed spin ladder models can be constructed from su(N) permutators. Heisenberg rung interactions appear as chemical potential terms in the Bethe Ansatz solution. Explicit examples given are a mixed spin-1 2 spin-1 ladder, a mixed spin-1 2 spin-3 2 ladder and a spin-1 ladder with biquadratic interactions.

A new filtration of the spaces of tri-/univalent graphs B u m that occur in the theory of finitetype invariants of knots and 3-manifolds is introduced. Combining the results of the two preceding articles, the quotients of this filtration are modeled by spaces of graphs with two types of edges and four types of vertices, and an upper bound for dimB u m in terms of the dimensions of the filtratio...

Seueral techniquesare available for implementingascalardigitaffilter using lattice and ladder structures which are known to yield low noise realizations. Ofthese, the lattice and ladder structures proposed by Gray and Markel have the advantage of being interimlly scaled Block implementation of a scalar digitalfilteroflers a number of advantages. Inthis pnpet, new algorithms to realize block dig...

Ladder inclined angle is a critical factor that could lead to a slip at the base of portable straight ladders, a major cause of falls from heights. Despite several methods established to help workers achieve the recommended 75.5° angle for ladder set-up, it remains unclear if these methods are used in practice. This study explored ladder set-up behaviours in a field environment. Professional in...

We designed a protein ladder (hereafter referred to as "Mega-tag") that contains 14 of the most commonly used epitope tags fused to molecular weight markers. The Mega-tag ladder can be simultaneously visualized when anti-tag antibodies are used to detect epitope-tagged recombinant proteins in Western blots. The logarithm of molecular weights and relative mobility of the Mega-tag protein ladder ...

After 20 years of a static clinical ladder program at our institution, the clinical ladder program was completely redesigned using a staff nurse-led shared governance structure to re-envision the program as an innovative, staff leadership model to meet our organizational nursing mission and vision strategic plans around retention and professional development. The literature demonstrated a lack ...