BACKGROUND Artificial gravity using short-radius centrifugation has been proposed as an integrative countermeasure during spaceflight. OBJECTIVE To determine the rotation parameters of a short-radius centrifuge so that subjects rotating in the dark would feel as if they were standing upright. METHODS Twelve subjects were lying supine in a nacelle on a 2.8 m-radius centrifuge with their head...

The commonly used British Standard constant head triaxial permeability test for testing of finegrained soils is relatively time consuming. A reduction in the required time for soil permeability testing would provide potential cost savings to the construction industry, particularly in the construction quality assurance of landfill clay liners. The purpose of this paper is to evaluate an alternat...

LABORATORY MICROCOSMS WERE USED TO: i) measure the effects of soil moisture on survival of Steinernema riobravis and ii) investigate the suitability of using microcosms to study motility and survival of these nematodes. Nematodes recovered from soil contained in petri dishes declined by more than 95% during 7 days, whereas nematodes recovered from the inner surfaces of dishes increased 35-fold....

Geotechnical engineering is a core discipline within civil engineering that supports the infrastructure development which underpins modern society. The simulation of realistic geotechnical design at undergraduate level is often restricted to routine calculation-based methods reinforced by simple element laboratory tests which fail to provide a holistic learning experience. Using the latest rese...

This paper investigates the uplift capacity of horizontal plate anchors in sand through finite element analyses and centrifuge experiments. The simulations adopt a sophisticated bounding surface plasticity model that accounts for stress- density-dependent behaviour, as well loading- fabric-related anisotropic effects sands. Failure mechanisms at peak anchor show failure occurs progressively, wi...