Heterodyne detection of CO2 emission lines and wind velocities in the atmosphere of Venus

Strong 10 micrometer line emission from (c-12)(o-16)2 in the upper atmosphere of Venus was detected by heterodyne techniques. Observations of the absolute Doppler shift of the emission features indicate mean zonal wind velocities less than 10 m/sec in the upper atmosphere near the equator. No evidence was found of the 100 m/sec wind velocity implied by the apparent 4-day rotation period of ultraviolet cloud features

Effect of homogenisation conditions on recrystallisation in the Al-Mg-Mn alloy AA5454

The purpose of the present work is to understand the microstructure development and, particularly, to control the progress of recrystallisation in hot strip in the Al-Mg-Mn alloy AA 5454, which is typically used for the manufacture of structural automotive components. The chemical composition, together with the thermomechanical processing history of this material, has a strong influence on the microstructure of the product and the resulting properties as it is supplied to the customer. Electrical conductivity measurements, thermal analysis and electron microscopy have been carried out to characterise the evolution of precipitation state at various stages in the processing route. The conditions of the homogenisation heat treatment have been varied, and the effect on subsequent recrystallisation after hot rolling has been evaluated in both the as cast and rough rolled condition by optical microscopy techniques. Results indicate that the conditions of homogenisation heat treatment and roughing rolling are critical for the generation of a suitable recrystallised microstructure in AA 5454 hot strip. A new two stage homogenisation practice has been developed to expedite post-rolling recrystallisation in this alloy

Heterodyne detection of CO2 emission lines and wind velocities in the atmosphere of Venus

Strong 10 micrometer line emission from (C-12)(O-16)2 in the upper atmosphere of Venus was detected by heterodyne techniques. Observations of the absolute Doppler shift of the emission features indicate mean zonal wind velocities less than 10 m/sec in the upper atmosphere near the equator. No evidence was found of the 100 m/sec wind velocity implied by the apparent 4-day rotation period of ultraviolet cloud features

Enzyme activity in terrestrial soil in relation to exploration of the Martian surface

Urease activity in soil is persistent for long periods under low water, low temperature, and sterile regimes, and it was suggested that some form of enzyme-protective mechanism exists in soil. Dublin soil was extracted by sonication in water followed by adding a mixture of salts. Urease activity is associated with the organo-mineral complex thus obtained and is resistant to the activities of proteolytic enzymes. Clay free soil organic matter prepared subsequently by filtration also exhibits urease activity which is resistant to proteolysis. Models consisting of enzymes with bentonite and lignin were found to mimic this resistance to proteolysis. A model system is presented which suggests both the origin and location of soil ureases and a reason for their persistence in nature

A novel measure of changes in force applied to the Perruchet Effect.

The reaction time (RT) version of the Perruchet Effect demonstrates a concurrent dissociation between RTs to respond and conscious expectancy of the outcome across runs of repeated trials. Consequently, the Perruchet Effect is considered strong evidence for multiple learning processes. This conclusion, however, relies on the RT trend being driven by associative learning rather than, as some have argued, US recency or priming mechanisms. Recent research examining the mechanisms underlying the RT trend do so by examining motor activity associated with the response. With this aim in mind, the current study developed, and assessed the usefulness of, a novel method to measure changes in the amount of force applied to the response button in an RT Perruchet paradigm. The results obtained could not be explained by a single mechanism, but suggest multiple factors underlying the RT version of the Perruchet effect

The Engineering Academy : increasing access to engineering

The Engineering Academy (EA) is an integrated programme between the University of Strathclyde, partner colleges and industry to widen access to undergraduate degrees in engineering. A partnership model was developed where students successfully complete an enhanced HNC at a partner college before transferring to second year of their chosen undergraduate degree within the Faculty of Engineering. EA entry requirements are lower than direct entry applications. Additional contextual information based on postcode; the Scottish Index of Multiple Deprivation; schools with low progression to university; or time in care, is used in selection. The programme also aligns with and accepts adult learner applicants from the Scottish Wider Access Programme. Three enhanced HNC pathways: Chemical Engineering, Electronic and Electrical Engineering and General Engineering require bespoke student transition activities tailored to the engineering discipline. The presentation will follow the evolution of the EA programme model from its inception to current day. This will include changes in the programme management; the establishment of curriculum and subject working groups to review, refine and share teaching practice; and development of transition activities. The results of these show a successful transition model into undergraduate engineering degrees for students from a range of backgrounds

Potential Biological Control Agents for \u3cem\u3eNassella neesiana\u3c/em\u3e (Poaceae) Invading Australian Native Grasslands

The introduction and proliferation of exotic stipoid grasses over the past 100 years seriously threatens agricultural productivity and the integrity of Australia\u27s indigenous flora and fauna, particularly its grasslands (McLaren et al., 1998). The full effect on biodiversity by the spread of these grasses is unknown but likely to be major (Hocking, 1998). Conventional control techniques have not stopped the invasion adequately, so it is a priority to find control options to achieve an effective management strategy. A biological control project against Nassella trichotoma and N. neesiana was initiated in 1999 in Argentina. We report on the most recent findings on two pathogens, Puccinia nassellae and Uromyces cf pencanus, selected on the basis of previous results (Anderson et al., 2004), as potential biological control agents against N. neesiana, a South American species that can dominate both pasture and native grasslands in Australia

Telecommunications Act of 1996: 704 of the Act and Protections Afforded the Telecommunications Provider in the Facilities Sitting Context, The

The Telecommunications Act of 1996, signed into law by President Clinton in February, addresses, among many other important subjects, some of the technical problems that have arisen from the increasing popularity of mobile communications. This article will provide an overview of the Act and will focus specifically on the protections afforded a telecommunications provider in § 704 of the Act

Telecommunications Act of 1996: 704 of the Act and Protections Afforded the Telecommunications Provider in the Facilities Sitting Context, The

The Telecommunications Act of 1996, signed into law by President Clinton in February, addresses, among many other important subjects, some of the technical problems that have arisen from the increasing popularity of mobile communications. This article will provide an overview of the Act and will focus specifically on the protections afforded a telecommunications provider in § 704 of the Act