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Search: WFRF:(McVay M)

  • Result 1-8 of 8
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1.
  • Schoch, C. L., et al. (author)
  • A class-wide phylogenetic assessment of Dothideomycetes
  • 2009
  • In: Studies in mycology. - : Westerdijk Fungal Biodiversity Institute. - 0166-0616 .- 1872-9797. ; 64, s. 1-15
  • Research review (peer-reviewed)abstract
    • We present a comprehensive phylogeny derived from 5 genes, nucSSU, nucLSU rDNA, TEF1, RPB1 and RPB2, for 356 isolates and 41 families (six newly described in this volume) in Dothideomycetes. All currently accepted orders in the class are represented for the first time in addition to numerous previously unplaced lineages. Subclass Pleosporomycetidae is expanded to include the aquatic order Jahnulales. An ancestral reconstruction of basic nutritional modes supports numerous transitions from saprobic life histories to plant associated and lichenised modes and a transition from terrestrial to aquatic habitats are confirmed. Finally, a genomic comparison of 6 dothideomycete genomes with other fungi finds a high level of unique protein associated with the class, supporting its delineation as a separate taxon.
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2.
  • McVay, M. C., et al. (author)
  • Load and resistance factor design (LRFD) for driven piles using dynamic methods - A Florida perspective
  • 2000
  • In: ASTM geotechnical testing journal. - : American Society for Testing and Materials. - 0149-6115 .- 1945-7545. ; 23:1, s. 55-66
  • Journal article (peer-reviewed)abstract
    • The parameters for load and resistance factor design (LRFD) of driven piles using dynamic methods are presented based on a database of 218 pile cases in Florida. Eight dynamic methods were studied: ENR, modified ENR, FDOT, and Gates driving formulas, Case Analysis with Wave Analysis Program (CAPWAP), Case Method for Pile Driving Analyzer (PDA), Paikowsky's energy method, and Sakai's energy method. It was demonstrated that the modern methods based on wave mechanics, such as CAPWAP, PDA, and Paikowsky's energy methods, are roughly twice as cost effective to reach the target reliability indices of 2.0 to 2.5 (failure probability = 0.62 to 2.5%) as the ENR and modified ENR driving formulas. The Gates formula, when used separately on piles with Davisson capacities smaller or larger than 1779 kN, has an accuracy comparable to the modem methods. The utilizable measured Davisson capacity, defined as phi/lambda (ratio of resistance/mean capacity) obtained from testing at beginning of redrive (BOR), is only slightly larger than the end of drive (EOD) values. Furthermore, past practice with driving formulas reveals the existence of a large redundancy in pile groups against failure. The latter suggests the use of a lower relatively reliability target index, B-T = 2.0 (p(f) = 2.5%) for single pile design. Also, the utilizable measured Davisson capacity, phi/lambda, for all the dynamic methods studied, is quite similar to published values (Lai et al. 1995; Sid; 1985) for static estimates from in situ tests.
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  • Result 1-8 of 8

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