546 research outputs found
Magnetic Flux Braiding: Force-Free Equilibria and Current Sheets
We use a numerical nonlinear multigrid magnetic relaxation technique to
investigate the generation of current sheets in three-dimensional magnetic flux
braiding experiments. We are able to catalogue the relaxed nonlinear force-free
equilibria resulting from the application of deformations to an initially
undisturbed region of plasma containing a uniform, vertical magnetic field. The
deformations are manifested by imposing motions on the bounding planes to which
the magnetic field is anchored. Once imposed the new distribution of magnetic
footpoints are then taken to be fixed, so that the rest of the plasma must then
relax to a new equilibrium configuration. For the class of footpoint motions we
have examined, we find that singular and nonsingular equilibria can be
generated. By singular we mean that within the limits imposed by numerical
resolution we find that there is no convergence to a well-defined equilibrium
as the number of grid points in the numerical domain is increased. These
singular equilibria contain current "sheets" of ever-increasing current
intensity and decreasing width; they occur when the footpoint motions exceed a
certain threshold, and must include both twist and shear to be effective. On
the basis of these results we contend that flux braiding will indeed result in
significant current generation. We discuss the implications of our results for
coronal heating.Comment: 13 pages, 12 figure
Phosphorus and sulphur group
Long Term Trials Stocking and superphosphate trials - 66M30, 68BR7. Maintenance Phosphorus x Sulphur trials - 65A1, 65N5, 65C5, 69WH15, 68B1, 69AL3 and 67N05. Low Rainfall Crops and Pastures. Residual phosphorus trials - 76ES8, 75KA4, 75LG26 and 76NA5. Miscellaneous Cropping Trials. Rate of phosphorus on wheat - 77ES2, 77ME5, 77N03. N. P and seed rates on wheat - 77JE1. Row spacing, phosphorus and seed rate on wheat - 77ME6. Phosphorus on nitrogen build up - 77M033. Rate of super on old land lupins - 77A18 & 19, 77BA13 & 14, 77E20. Pasture Trials. Phosphorus and Sulphur on old land pasture - 77BA 17, 18, 19, 20, 21 , 22, 23 and 24. High Rainfall Pasture Trials. Current and residual phosphorus - 75AL5, 75DE5, 75DE7, 75BR13, 76BU13(a), 76KE10 and 76MA2. Phosphorus and Sulphur 1977 Phosphorus Soil Test Series - 77AL5, 77AL6, 77HA10, 77DE6 & 7, 77BR14, 15, 16, 17, 18 & 19, 77BU6 & 7, 77BY3
General phosphorus and sulphur trials
(A) Long Term Trials/Trial number: Super x Stocking Rate - 66M30. Super Sulphur and Stocking Rate - 68BR7. Maintenance P and S trials - 69E6, 68B1, 65A1, 65N5, 65C5, 69WH15 & 67N05. Continuous Cropping - 75LG26. Cropping Residual Value - 29M/148, 149. (B) Lupin Trials: Rate of P and S - 78A8, 78A9, 78BA9, 78BA10, 78C5, 78C6, 78E8, 78E9, 78WH7, 78WH8 & 78NA25. Current and Residual phosphorus - 75KA4. (C) Cereal Trials: Depth of Placement of P on Wheat - 78M38. Row spacing x P rates on Wheat - 78ME4. Current and Residual Nitrogen on Wheat - 77M033. (D) Pasture Trials: Times of application - 77BA38. Residual value - 77BA21, 78BA7, 77BA22, 77BA24, 78M010. Rates of Phosphorus - 78M011. P and S on irrigated pastures - 77HA10
Phosphorus and sulphur interactions, 1978.
Yield results, 78AL3, 78KE4, 78M08, 78BY3, 78BA8, 78BU3, 78N04, 78A7, 78C4, 78B4, 78MA2.
Soil sampling data
The effect of calcium aluminates on the coke analogue gasification
The gasification rate in CO2 of the coke analogue containing calcium oxide was studied using analogues doped with alumina (corundum), calcium aluminates (CA6, CA, C3A) and lime minerals. The coke analogue is a laboratory material with simplified carbon structure that has a mineral component with a particle size, size distribution and mineral dispersion that can be controlled. The main focus of this study was to quantitatively assess the effect of calcium in the mineral on the analogue’s reactivity. The analogues were reacted with CO2 isothermally in the temperature range of 1173–1623 K. It was found that the reaction rate increased with increasing CaO activity/number of moles of Ca in the mineral. The relative reaction rates (from lowest to highest) of the analogues doped were alumina, CA6, CA, C3A and lime. The relative apparent activation energies of the gasification from lowest to highest was lime, C3A, CA, CA6 and alumina
SUMMARY OF EXPERIMENTAL RESULTS 1979 GENERAL PHOSPHOROUS TRIALS
Contiuing trials Stock rate and level of Superhosphate on cyprus medic pasture 66M30 Rates of phosphorus, sulphur and stocking trial - cropping phase 68BR7 Maintenance P x S trials 65N5, 69WH15, 65A1, 65c6 Residual Value of Phosphorus 78M08, 78C4, 78MA2, 75LG26, 78M38 NEW TRIALS Crops N x P Trials 79NA11, 79NA12, 79NA13 Times of P on Lupins 79M030 Lupin and Oat Mixtures 79BA31, 79MT30 Methods Application and Cultivation of P on Wheat 79M1, 79WH1 Methods and Times of P on Wheat Old Land 79N1 Rates of Super on Wheat 79LG Rates of Super on Lupins 79GE PASTURES Rates of P, K and S on Pasture - Dandaragan 79M012, 79M013, 79M015, 79M017 Rates of P, K and S on Pasture – Lancelin 79M011, 79M018 Rates of P on Pasture – Newdegate 79N5, 79N6 Rates of P x Species on Pasture 79N05, 79JE
Super and stocking rates at Kojonup after 10 years
A Department of Agriculture trial on old land at Kojonup has been comparing rates of superphosphate and stocking of sheep for 10 years
1976 Phosphorus and sulphur group
Stocking x Super. rate trials - 66M30, 62MB9, 68BR7. Crossed plot trials - residual value. P x K on Pasture - 74TS4, 74M06, 75GE6. N x P on· Wheat - 75M09. P x Species - 75LG4, 75JE5. Maintenance P x S trials - Wheat Belt Research Station - 65A1; C5, N5, 69WH15. High Rainfall Areas - 68B1, 69E6, 69AL2. Farmers residual value - 66N07, 66ME3,67N011, 66NA3, 66LG1, 68LG1, 66M06, 67M01, 67GE2, 67N05, 67N04, 66N09. Miscellaneous Cropping Trials - Super x Spacing - 76ME26, 76ES8, 9 and 10. Super Study rate and spacing - 76NA7, 76N05, 76JE8. Continuous cropping - 75LG26, 75ES7. Rates, Methods and times of Super - 76KA3, 76JE3. Super on old land lupins - 76BA3 & 4, 76A4 76E3 & 4, 76WH7 & 8. High Rainfall Pasture Trials - 1976 Soil Testing Series - 76BY3,·4, 5, &·6, Skirrow 76BR10, 11, 12, 16 & 17. 76HA2; 3, 4, 5, 6 & 7 76KE5, 6, 7, 8, 9 & 10. 76MA5 & 6. P x S series - 76KE3 & 4, 76MA2 & 4. Cross Plot x Soil test series - 75AL5, 75DE2, 3, 4, 5 & 7. 75Bu8 & 10, 75BY6 & 8 75BR11, 12 & 13, 75AR4, 75HA7
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Confident, fearful and hopeless cooks: Findings from the development of a food-skills initiative
One of the many barriers to a healthier diet in low-income communities is a presumed lack of practical food skills. This article reports findings from exploratory qualitative research conducted with potential participants in a cooking skills intervention, in low income communities in Scotland. The research found widely varying levels of skill and confidence regarding cooking, supported the need for a community-based intervention approach, and demonstrated the importance of consumer research to inform the content of interventions. Challenges the view that low income communities lack skills, suggesting that food skills should be defined more broadly than “cooking from scratch”. Other barriers to healthy eating, such as poverty, food access and taste preferences, remain important
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