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Browsing Staff publications (SAS) by Publication Date

Now showing items 1-20 of 903

The influence of imposed strain rate on fracture of surface oxides.

Hancock, P.; Nicholls, John R.; Mahmood, K. (Elsevier Science B.V., Amsterdam., 1993-01-01)

The mechanical properties of chromium rich scales formed on 304 stainless steel have been investigated as a function of deformation rate and operating temperature. At 900C at slow strain rates < 10-6 per second no ...
Evapotranspiration Estimates for Water Balance Scheduling in the UK

Hess, Tim M. (1996-01-01)

This paper compares the use of different methods for estimating reference evapotranspiration (ETo) for irrigation scheduling in the UK. Methods include use of long-term averages, daily weather data and evaporimeters. The ...
Evaluation of the behaviour of particulate polymeric coatings in a corrosive environment. Influence of the concentration of metal particles

Kouloumbi, N.; Tsangaris, G. M.; Skordos, Alexandros A.; Kyvelidis, S. (Elsevier Science B.V., Amsterdam., 1996-06-01)

In this work pretreated steel specimens were coated by a spinning process with particulate polymeric composites consisting of an epoxy resin (DOW 331) and iron powder. Applied coatings were roughly 70 Î¼m thick and the ...
Irrigation Demand and On-Farm Water Conservation in England and Wales

Weatherhead, E. K.; Knox, Jerry W.; Morris, Joe; Hess, Tim M.; Bradley, R. Ian; Sanders, Catherine L. (1997-01-01)

The study confirmed that water use for agricultural irrigation is increasing, both in area irrigated and depths applied, and is increasingly concentrated on the more valuable crops. Underlying volumetric growth was 3% ...
Modelling heat generation and transfer during cure of thermoset composites processed by resin transfer moulding (RTM)

Skordos, Alexandros A.; Maistros, George M.; Turmel, Denis J-P; Partridge, Ivana K. (1997-09-01)

The development of a heat transfer model for the curing stage of the RTM process is presented. Despite the intense interest in the modelling and simulation of this process the relevant work is currently limited to ...
Lag phases in the adsorption of lysozyme to Si(Ti)O2 surfaces in the presence of sodium thiocyanate. Part I. Phenomenology.

Ball, Vincent; Lustig, Ariel; Ramsden, Jeremy J. (Royal Society of Chemistry, 1999)

The adsorption kinetics of hen egg white lysozyme (HEWL) in the presence of NaSCN at pH 7.4 onto Si0.8Ti0.2O2 surfaces were measured by means of time-resolved optical waveguide lightmode spectroscopy (OWLS). The adsorption ...
Minimising the environmental impacts of irrigation by good scheduling

Hess, Tim M. (1999-01-01)

Irrigation constitutes a major user of water resources at a time, and in places, where resources are at their lowest. Also, by maintaining the soil in a wetter state, it increases the annual drainage, which can affect ...
Effects of agroforestry on farm biodiversity in the UK.

Burgess, Paul J. (The Royal Scottish Forestry Society, 1999-01-01)

One advantage claimed for agroforestry is that it can bring onto farmland some of the biodiversity benefits associated with woodlands. The aim of this paper is to review recent research in order to describe the potential ...
Monitoring and Heat Transfer Modelling of the Cure of Thermoset Composites Processed by Resin Transfer Moulding.

Skordos, Alexandros A.; Partridge, Ivana K. (1999-10-06)

Experimental studies have demonstrated the existence of significant thermal gradients during the cure stage of Resin Transfer Moulding (RTM). Presence of such thermal gradients can affect the final degree-of-cure ...
Human error in the engineering design process.

Busby, Jeremy S. (Professional Engineering Publishing, 2000)

A study was conducted of human error in the engineering process of 5 organisations that designed industrial equipment. Approximately 150 errors that had taken place were analysed individually and then coded according to ...
A dielectric sensor for measuring flow in resin transfer moulding.

Skordos, Alexandros A.; Karkanas, Panagiotis I.; Partridge, Ivana K. (Iop Publishing Ltd, 2000-01-01)

The development, analysis and experimental validation of a novel flow and cure sensor for use in the resin transfer moulding of composites are presented. A linear relationship is established between the flow front position ...
A Mechanism for the Erosion of EB PVD TBCS

Wellman, R. G.; Nicholls, John R. (Trans Tech Publications, Switzerland., 2000-07-10)

Since the introduction of electron beam (EB) physical vapour deposition (PVD) TBCs and their application to moving components in the hot gas stream, erosion has become a prime concern. This project has been involved in ...
Some observations on erosion mechanisms of EB PVD TBCS

Wellman, R. G.; Nicholls, John R. (Elsevier Science B.V., Amsterdam., 2000-07-10)

Following the successful application of electron beam (EB) physical vapour deposition (PVD) thermal barrier coatings (TBCs) to moving parts of turbine engines, the erosion resistance of these coatings has been of interest ...
Dielectric flow sensing in resin transfer moulding of carbon fibre reinforced composites.

Skordos, Alexandros A.; Partridge, Ivana K. (Maney Publishing, 2000-08-01)

An in situ dielectric technique for sensing flow is outlined and shown to be suitable for use in moulding of composites from liquid resins containing continuous conducting fibres. This work builds upon the recent development ...
e-Knowledge: an approach to fostering manufacturing know-how at the shop floor

Tjahjono, Benny; Bin, Wu (Production and Operations Management Society, 2001)

This paper presents an application of the web technology in promoting knowledge management at the shop floor, known as e-knowledge. The system is expected to promote sharing and reusing various levels of manufacturing ...
Evaluation of a manufacturing task support system using the Task Technology Fit Model

Tjahjono, Benny; Fakun, D.; Greenough, Richard M.; Kay, John M. (Production and Operations Management Society, 2001)

This paper presents an exploratory study of a Task Support System (TSS) supporting manufacturing task operations. The study investigated the degree to which a TSS, in use in a company, actually supports the task of the ...
Transformation dependence of lead zirconate titanate (PZT) as shown by PiezoAFM surface mapping of Sol-gel produced PZT on various substrates.

Dunn, Steve; Whatmore, Roger W. (Taylor and Francis, 2001)

PZT was grown on STP (Si/SiO2/Ti/Pt (Ti 5nm, Pt 100nm)), SAP (Si/Si3N4/Al/Ti/Pt (Al 100nm, Ti 10nm, Pt 15nm)) and GI (Glass/ITO(Indium Tin Oxide)). In each case the PZT underwent the same heat treatment, 200ºC for 2 ...
A comparison of the responses of mature and young clonal tea to drought.

Nixon, D. J.; Burgess, Paul J.; Sanga, B. N. K.; Carr, M. K. V. (Cambridge University Press, 2001-01-01)

To assist commercial producers with optimising the use of irrigation water, the responses to drought of mature and young tea crops (22 and 5 years after field planting respectively) were compared using data from two ...
Expert Judgement in Cost Estimating: Modelling the Reasoning Process.

Rush, Christopher; Rajkumar, Roy (Sage Publications, 2001-01-01)

Expert Judgement (EJ) is used extensively during the generation of cost estimates. Cost estimators have to make numerous assumptions and judgements about what they think a new product will cost. However, the use of EJ is ...
Integrated models of livestock systems for climate change studies. 2. Intensive systems.

Turnpenny, J. R.; Parsons, David J.; Armstrong, A. C.; Clark, J. A.; Cooper, K. C.; Matthews, A. M. (Blackwell Publishing Ltd, 2001-01-01)

The potential impact of climate change by the year 2050 on intensive livestock systems in Britain is assessed through the use of simulation models of farming systems. The submodels comprise livestock feeding, livestock ...

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