The type specimens of five species of Eleodes described by Francis Walker from British Columbia, Canada, were studied in order to establish their true identity. The synonymy of Eleodes convexicollis Walker and E. conjunctus Walker with E. obscurus (Say); that of Eleodes latiusculus Walker with E. humeralis LeConte;  and that of Eleodes binotatus Walker with  Eleodes hispilabris (Say) is confirm...

A reformulation of Walker’s theorem on the cancellation of Z says that any two homomorphisms from an abelian group B onto Z have isomorphic kernels. It does not have a constructive proof, even for B a subgroup of Z3. In this paper we give a constructive proof of Walker’s theorem for B a direct sum, over any discrete index set, of groups of the following two kinds: finite-rank torsion-free group...

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The aim of this study was to evaluate three types of walkers for elderly people. Four elderly patients participated in the study. The experiments were performed using three walkers: a familiar conventional folding walker, a caster walker and a power-assisted walker. We evaluated walking speed, body acceleration and an electromyogram of the gastrocnemius during use of each walker. The results in...

We prove a quenched invariance principle for class of random walks in environment on $${\mathbb {Z}}^d$$ , where the walker alters its own environment. The consists an outgoing edge from each vertex. updates e at current location to new $$e'$$ (whose law depends e) and then steps other endpoint . show that native these (i.e., is stationary time perspective walker) wired uniform spanning forest ...

OBJECTIVES Compare the efficacy of two walking assistance devices (wheeled walker and standard walker) to unassisted walking for patients with PD and gait freezing. BACKGROUND Although numerous walking devices are used clinically, their relative effects on freezing and walking speed have never been systematically tested. METHODS Nineteen PD patients (14 non-demented) walked under three cond...