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We examine the conditions that give rise to metastable, persistent currents in a trapped Bose-Einstein condensate. A necessary condition for the stability of persistent currents is that the trapping potential is not a monotonically increasing function of the distance from the trap center. Persistent currents also require that the interatomic interactions are sufficiently strong and repulsive. Fina
Abstract not available
A novel approach to the control of a GDI engine is presented.Conventional control of car engines is normally based on extensive use of engine maps, i.e., matrix-based lookup tables that have been derived through extensive engine test bench experiments. This is an open loop approach which can be sensitive to engine-to-engine variations and variations due to aging and wear. In this paper it is shown
Sensing and quantification of biomolecules are becoming increasingly important in medical diagnostics, bioprocess technology and recently in homeland security. The majority of techniques currently employed to interrogate biomolecules require some type of radio-, enzymatic- or fluorescent-labeling. However, there is an increasing awareness of novel techniques in which biomolecules are detected in t
Web wrinkling is one of the more common web handling problems, caused by shear forces, resulting from in-plane misaligned rollers. Several analytical models have been derived, mainly based on the theory of beams or membranes and isotropic material properties. Paper is a highly anisotropic material but can be assumed orthotropic for thin structures as paper web. For this reason, an orthotropic plan
This study evaluates the costs associated with foraging for birds in a savannah woodland area in central Nigeria. Specifically, it looks at the following questions: 1) how does seasonal variability in food and water availability affect the value of resources to birds in dry environments? 2) Does proximity to water affect foraging decisions? What implication will this have in the management of sava
Five sets of gloves were tested on 3 hand models with 2 measuring system in order to ensure repeatability of results from the past and for the future. The other aims of the study were to compare the possible differences related to different number of measuring zones, and effect of temperature distribution over hand surface. The hand models had 2 (HF), 9 (H2) and 10 (H3) zones respectively. Models
