Psychology at the University of Strathclyde, Glasgow

Berry, Newell H.

doi:10.1037/e463972008-001

Cited by 3 publications

(4 citation statements)

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“…= -c3 cos4 8 -+pc2 sin' 8 cos' 0, At first sight it would appear that results for the solitary wave limit could be obtained more directly by taking uo(r) in Such a calculation delivers the result [23] w: -pc sin' 6/28 = 0 which is consistent with (4.2). However, it turns out that Su, does not vanish both as 5 -+ -00 and 5 + CO. Clearly this derivation of (4.3) is invalid.…”

Section: ~R supporting

confidence: 65%

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The derivation of a modified Kadomtsev–Petviashvili equation and the stability of its solutions

O'Keir¹,

Parkes

1997

Phys. Scr.

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A modified Kadomtsev–Petviashvili (MKP) equation is proposed. The equation is a weakly two-dimensional generalisation of the Schamel equation. It is shown that one form of this equation arises in the context of the propagation of ion-acoustic waves in a plasma with non-isothermal electrons. The stability of certain plane periodic and solitary travelling wave solutions of the MKP equation to two-dimensional long wavelength perturbations is investigated using the method of Rowlands and Infeld. The results obtained are compared with those for the standard KP equation; some qualitative differences are found.

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Section: ~R supporting

confidence: 65%

“…The quantities rl, r3 and m in (3.18) are known once A is specified. (The 8, may also be calculated directly from (3.7) by finite part integration [23]; this provides a useful check on the above calculations. )…”

Section: (~ -Cue) + ~O U " ~U ~mentioning

confidence: 98%

The derivation of a modified Kadomtsev–Petviashvili equation and the stability of its solutions

O'Keir¹,

Parkes

1997

Phys. Scr.

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“…This is not dissimilar to the structure seen in the overlap regions of EH46 steel, where the grain size was measured at ∼2 μm. 21 This smaller grain size is from a niobium–vanadium microalloyed steel, whereas the carbon steel has no microalloys in it. In addition, the EH46 has a smaller overlap region and is significantly thicker (14.5 mm).…”

Section: Resultsmentioning

confidence: 99%

Friction stir welding of 6 mm thick carbon steel underwater and in air

Baillie

Campbell

Galloway

et al. 2015

Science and Technology of Welding and Joining

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This study compared the mechanical and microstructural properties produced during friction stir welding (FSW) of S275 structural steel in air and underwater. Post weld tests assessed the tensile strength, micro-hardness, distortion, Charpy impact toughness and fatigue performance in each case. The study showed that there was no significant difference in the strength, hardness or fatigue life of the air and underwater specimens. However, Charpy impact toughness was shown to decrease for the underwater specimens and was attributed to the presence of a slightly less angular grain structure than the samples welded in air. Reduced angular and longitudinal distortion was observed in the underwater welded plate compared to the plate welded in air.

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“…However, both genes are enough to separate the different clades of the R. microplus complex. Accordingly, COI was chosen as the only marker for providing evidence of R. microplus in Kenya and Sub-Saharan Africa [54] and India [10], for studying the taxonomic status of the complex of species [55], or for checking the population variability of the tick in South Africa [8]. The finding of a lack of correlation between the genetic distances of the COI and 16S genes among the geo-referenced samples of R. microplus and the geographic distance confirms that populations tend to be genetically similar at long distances.…”

Section: Discussionmentioning

confidence: 99%

Low Genetic Diversity of the Only Clade of the Tick Rhipicephalus microplus in the Neotropics

Díaz-Sánchez,

Hernández-Triana,

Labruna

et al. 2023

Pathogens

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This study addresses the variability of the mitochondrial cytochrome oxidase subunit I (COI) and 16S rDNA (16S), and nuclear internal transcriber spacer ITS2 (ITS2) genes in a set of field-collected samples of the cattle tick, Rhipicephalus microplus (Canestrini, 1888), and in geo-referenced sequences obtained from GenBank. Since the tick is currently considered to be a complex of cryptic taxa in several regions of the world, the main aims of the study are (i) to provide evidence of the clades of the tick present in the Neotropics, (ii) to explore if there is an effect of climate traits on the divergence rates of the target genes, and (iii) to check for a relationship between geographical and genetic distance among populations (the closest, the most similar, meaning for slow spread). We included published sequences of Rhipicephalus annulatus (Nearctic, Afrotropical, and Mediterranean) and R. microplus (Afrotropical, Indomalayan) to fully characterize the Neotropical populations (total: 74 16S, 44 COI, and 49 ITS2 sequences included in the analysis). Only the clade A of R. microplus spread in the Nearctic–Neotropics. Both the K and Lambda’s statistics, two measures of phylogenetic signal, support low divergence rates of the tested genes in populations of R. microplus in the Neotropics. These tests demonstrate that genetic diversity of the continental populations does not correlate either with the geographic distance among samples or with environmental variables. The low variability of these genes may be due to a combination of factors like (i) the recent introduction of the tick in the Neotropics, (ii) a large, effective, and fast exchange of populations, and (iii) a low effect of climate on the evolution rates of the target genes. These results have implications for the ecological studies and control of cattle tick infestations.

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Psychology at the University of Strathclyde, Glasgow

Cited by 3 publications

References 0 publications

The derivation of a modified Kadomtsev–Petviashvili equation and the stability of its solutions

The derivation of a modified Kadomtsev–Petviashvili equation and the stability of its solutions

Friction stir welding of 6 mm thick carbon steel underwater and in air

Low Genetic Diversity of the Only Clade of the Tick Rhipicephalus microplus in the Neotropics

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