BACKGROUND Foraging workers of grass-cutting ants (Atta vollenweideri) regularly carry grass fragments larger than their own body. Fragment length has been shown to influence the ants' running speed and thereby the colony's food intake rate. We investigated whether and how grass-cutting ants maintain stability when carrying fragments of two different lengths but identical mass. PRINCIPAL FIND...

agricultural training centres (atcs) promote crop and livestock development by providing extension information to farmers and serving as models of improved crop and livestock husbandry practices. although potato farmers in nyandarua county were trained on potato production technologies, their average yield was ≤16 tonnes per hectare compared to the national potential of 30 tonnes. this study th...

During goal-directed tasks, such as lifting low-lying objects, the human motor system regulates the body’s centre of mass (CoM) position to maintain equilibrium and prevent falling [1]. During lifting, any voluntary trunk movement will perturb that equilibrium, which will elicit an automatic postural response requiring the coordinated control of several joints [2]. To actively counter perturbat...

condition of the respiratory centre. His plan of restoring the stability of the respiratory centre is to cauterise that part of the nasal septum, which lies opposite to, and immediately above, the anterior third of the middle turbiated bone. He acknowledges that the procedure is empirical. It was found out by accident, and its effect was so striking that he tried it again, and finally used it a...

1 Terry Fox Laboratory, BC Cancer Agency, Vancouver BC, Canada V5Z 1L3 2 Centre for Molecular Medicine and Therapeutics, Vancouver BC, Canada V5Z 4H4 3 Genome Stability Laboratory, CHU de Québec Research Center, HDQ Pavilion, Oncology Axis, 9 McMahon, Québec City, QC G1R 2J6, Canada 4 Department of Molecular Biology, Medical Biochemistry and Pathology; Laval University Cancer Research Center, Q...

David Lando1,5,†, Ulrike Endesfelder3,†, Harald Berger4, Lakxmi Subramanian4, Paul D. Dunne2, James McColl2, David Klenerman3, Antony M. Carr5, Markus Sauer3, Robin C. Allshire4, Mike Heilemann3 and Ernest D. Laue1 Department of Biochemistry, and Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK Department of Biotechnology and Biophysics, Julius-Maximilians-University Würz...

Abstract Vehicle braking stability performance can improve the safety of vehicle driving during a braking. However, some parameters structure impact on stability, characteristic law relevant is ignored. A simulation model established using software CarSim. The included in system, suspension, steering mechanism, system. wheelbase, and height centre mass analysed. concluded. Based law, ideal obta...

In this paper we demonstrate that signal propagation across a laminar sheet of recurrent neurons is maximised when two conditions are met. First, neurons must be in the so-called centre crossing configuration. Second, the network's topology and weights must be such that the network comprises strongly coupled nodes, yet lies within the weakly coupled regime. We develop tools from linear stabilit...