8,448 research outputs found
Incorporation of 3 μm SiCp into Titanium surfaces using a 2.8 kW laser beam of 186 and 373 MJ m-2 energy densities in a nitrogen environment
No full textThe formation of composite layers using a 2.8 kW laser beam of 186 and 373 MJ m−2 energy densities, on commercial purity titanium surfaces preplaced with 3 μm size, 1-4 vol.% SiCp powder in a 100% nitrogen environment, produced gold colour tracks. The tracks gave reflective surfaces after glazing at an energy density of 373 MJ m−2 and dull or a mixture of dull and shiny surfaces at 186 MJ m−2 energy density. Surface cracks were visible in tracks containing 1 and 2 vol.% SiCp, but none were observed in the 4 vol.% SiCp tracks glazed at both energy densities. In the track cross sections, vertical cracks were seen in the 373 MJ m−2 tracks but it was absent in 186 MJm−2 tracks. The SiCp particles completely dissolved in all the tracks processed in this investigation producing a complex and inhomogeneous microstructure of dendrites and needle particles. At the half way of the melt depth from the surface, the dendrites were larger and densely populated, especially after glazing at 373 MJ m−2. The hardness measurement of the MMC layer recorded a wide range of hardness values which gave loops in the hardness profiles. Hardness values ranging from 700 to 1000 Hv were observed up to a melt depth of 1 mm in many tracks and the maximum surface hardness of 2250 Hv was measured in the track containing 1 vol.% SiCp and glazed at 373 MJ m−2. The surface hardness developed 5.6-15 times the base hardness (150 Hv) depending on the dendrite population. The 3 μm size SiCp produced MMC layers 1.5-2 times greater than those previously observed with 6 μm SiCp. The large surface area for an equivalent volume fraction of the three micron carbide particles is considered to have a high laser coupling action and hence absorbed more heat energy to produce deeper melt depth compared to those produced using the 6 μm SiCp
Differences in quality of care among patients hospitalized with atrial fibrillation as primary or secondary cause for admission
No full textJHI852530_Supplemental_material_CLN – Supplemental material for The unmet needs of carers of stroke survivors: An evaluation of Google search results
No full textSupplemental material, JHI852530_Supplemental_material_CLN for The unmet needs of carers of stroke survivors: An evaluation of Google search results by Alexandra MJ Denham, Olivia Wynne, Amanda L Baker, Neil J Spratt and Billie Bonevski in Health Informatics Journal</p
The worldwide status of phasmids (Insecta: Phasmida) as pests of agriculture and forestry, with a generalised theory of phasmid outbreaks
No full text© 2015 Baker. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://
creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided
you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate
if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/
zero/1.0/) applies to the data made available in this article, unless otherwise stated. The file attached is the published version of the article.NHM Repositor
Self-compression of 4.9 µm pulses to sub-40 fs with 2 mJ energy in Zinc Sulfide
No full textNonlinear self-compression of few-cycle multi-mJ pulses at 4.9 µm in ZnS is presented. 80 fs input pulses are compressed to 37 fs with 2.1 mJ energy at a 1 kHz repetition rate. © 2024 The Author(s
Menstrual and oral contraceptive cycle phases do not affect submaximal and maximal exercise responses
No full textTo examine whether the menstrual or monophasic oral contraceptive cycle phases affect submaximal (oxygen uptake (
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O2 ) kinetics, maximal lactate steady-state (MLSS)) and maximal (
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O2max , time-to-exhaustion (TTE)) responses to exercise in healthy, active women. During the mid-follicular or inactive-pill phase and the mid-luteal or active-pill phase of the respective menstrual or oral contraceptive cycle, 15 non-oral contraceptive users (mean and standard deviation (SD) (±): 27 ± 6 years; 171 ± 5 cm; 65 ± 7 kg) and 15 monophasic oral contraceptive users (24 ± 4 years; 169 ± 10 cm; 68 ± 10 kg) performed: one
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O2 kinetics test; one ramp-incremental test; two to three 30-minute constant-load cycling trials to determine the power output corresponding to MLSS (MLSSp ), followed by a TTE trial. The phase of the menstrual or oral contraceptive cycle did not affect the time constant of the
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O2 kinetics response (τ
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O2 ) (mid-follicular, 20 ± 5 seconds and mid-luteal, 18 ± 3 seconds; inactive-pill, 22 ± 8 seconds and active-pill, 23 ± 6 seconds),
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O2max (mid-follicular, 3.06 ± 0.32 L min-1 and mid-luteal, 3.00 ± 0.33 L min-1 ; inactive-pill, 2.87 ± 0.39 L min-1 and active-pill, 2.87 ± 0.45 L min-1 ), MLSSp (mid-follicular, 181 ± 30 W and mid-luteal, 182 ± 29 W; inactive-pill, 155 ± 26 W and active-pill, 155 ± 27 W), and TTE (mid-follicular, 147 ± 42 seconds and mid-luteal, 128 ± 54 seconds; inactive-pill, 146 ± 70 seconds and active-pill, 139 ± 77 seconds) (P > .05). The rate of perceived exertion (RPE) at minute 30 of the MLSSp trials was greater in the mid-follicular phase (6.2 ± 1.5) compared with the mid-luteal phase (5.3 ± 1.4) for non-oral contraceptive users (P = .022). The hormonal fluctuations between the menstrual and oral contraceptive cycle phases had no detectable effects on submaximal and maximal exercise performance, even when RPE differed
Initial state and transition-state solvation effects in the cobaltotungstate oxidation of iodide in binary aqueous solvent mixtures
No full textPT: J; CR: AMJAD Z, 1977, CAN J CHEM, V55, P3581 BAKER LCW, 1956, J AM CHEM SOC, V78, P4503 BECK MT, 1968, COORDIN CHEM REV, V3, P91 BLANDAMER MJ, UNPUB CAN J CHEM BLANDAMER MJ, 1978, J CHEM SOC CHEM COMM, P963 BLANDAMER MJ, 1979, PURE APPL CHEM, V51, P2087 BLANDAMER MJ, 1980, COORDIN CHEM REV, V31, P93 BLANDAMER MJ, 1980, J CHEM SOC DA, P1 BLANDAMER MJ, 1980, J CHEM SOC DA, P2442 BRODOVITCH JC, UNPUB BURGESS J, 1968, J CHEM SOC A, P2571 BURGESS J, 1970, J CHEM SOC A, P2111 BURGESS J, 1970, J CHEM SOC A, P2351 BURGESS J, 1972, INORGANIC REACTION M, V2, P127 BURGESS J, 1973, J CHEM SOC A, P825 BURGESS J, 1974, INORGANIC REACTION M, V3, P142 BURGESS J, 1977, INORGANIC REACTION M, V5, P158 BURGESS J, 1979, INORGANIC REACTION M, V6, P168 COX BG, 1974, ANN REP CHEM SOC A, V71, P249 COX BG, 1979, J CHEM SOC F1, V75, P1780 COX BG, 1979, J CHEM SOC FARAD T 1, V75, P86 DELIGNY CL, 1965, RECL TRAV CHIM PAY B, V84, P81 ELLIS KJ, 1973, J CHEM SOC DA, P1533 GRUNWALD E, 1948, J AM CHEM SOC, V70, P846 KANEMAQUIRE LAP, 1975, J CHEM SOC DA, P1890 KEPERT DL, 1978, J CHEM SOC DA, P137 MARCUS RA, 1968, J PHYS CHEM-US, V72, P891 PELIZZETTI E, 1976, INORG CHEM, V15, P2898 SUBHANI MS, 1978, REV ROUMAINE CHIM, V23, P719 UDOVENKO VV, 1977, RUSS J INORG CHEM, V22, P168 WELLS CF, 1973, J CHEM SOC FARAD T 1, V69, P984 WELLS PR, 1968, LINEAR FREE ENERGY R, CH4; NR: 32; TC: 14; J9: TRANSIT METAL CHEM; PG: 4; GA: NG073Source type: Electronic(1
Matching methods to produce maps for pest risk analysis to resources
No full textDecision support systems (DSSs) for pest risk mapping are invaluable for guiding pest risk analysts seeking to add maps to pest risk analyses (PRAs). Maps can help identify the area of potential establishment, the area at highest risk and the endangered area for alien plant pests. However, the production of detailed pest risk maps may require considerable time and resources and it is important to match the methods employed to the priority, time and detail required. In this paper, we apply PRATIQUE DSSs to Phytophthora austrocedrae, a pathogen of the Cupressaceae, Thaumetopoea pityocampa, the pine processionary moth, Drosophila suzukii, spotted wing Drosophila, and Thaumatotibia leucotreta, the false codling moth. We demonstrate that complex pest risk maps are not always a high priority and suggest that simple methods may be used to determine the geographic variation in relative risks posed by invasive alien species within an area of concern
Psychophysical evidence for two routes to suppression before binocular summation of signals in human vision
No full textVisual mechanisms in primary visual cortex are suppressed by the superposition of gratings perpendicular to their preferred orientations. A clear picture of this process is needed to (i) inform functional architecture of image-processing models, (ii) identify the pathways available to support binocular rivalry, and (iii) generally advance our understanding of early vision. Here we use monoptic sine-wave gratings and cross-orientation masking (XOM) to reveal two cross-oriented suppressive pathways in humans, both of which occur before full binocular summation of signals. One is a within-eye (ipsiocular) pathway that is spatially broadband, immune to contrast adaptation and has a suppressive weight that tends to decrease with stimulus duration. The other pathway operates between the eyes (interocular), is spatially tuned, desensitizes with contrast adaptation and has a suppressive weight that increases with stimulus duration. When cross-oriented masks are presented to both eyes, masking is enhanced or diminished for conditions in which either ipsiocular or interocular pathways dominate masking, respectively. We propose that ipsiocular suppression precedes the influence of interocular suppression and tentatively associate the two effects with the lateral geniculate nucleus (or retina) and the visual cortex respectively. The interocular route is a good candidate for the initial pathway involved in binocular rivalry and predicts that interocular cross-orientation suppression should be found in cortical cells with predominantly ipsiocular drive
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