3,558 research outputs found
Strategus atlanticus Ratcliffe 1976
No full text<i>Strategus atlanticus</i> Ratcliffe <p> <i>Strategus atlanticus</i>, known only by the holotype, is from San Salvador Island (formerly Watling Island) in the Bahamas (Ratcliffe 1976). Christopher Columbus made his first New World landfall at this island on 12 October 1492. The name of the island was changed from Watling to San Salvador, the original name given to it by Columbus, in 1926. The occurrence of <i>S. atlanticus</i> on San Salvador in the southern Bahamas is almost certainly the result of its ancestors being fortuitously rafted from Cuba, Hispaniola, or Puerto Rico, where it has close phylogenetic relationships with <i>S. aenobarbus</i> (Fabr.), <i>S. ajax</i>, and <i>S. talpa</i> (Fabr.) (Ratcliffe 1976).</p> <p> <b>San Salvador</b>, 10-21 October 1891, C. B. Cory, 1 male, MCZC.</p>Published as part of <i>Ratcliffe, Brett C. & Cave, Ronald D., 2008, The Dynastinae (Coleoptera: Scarabaeidae) of the Bahamas with a description of a new species of Cyclocephala from Great Inagua Island, pp. 1-10 in Insecta Mundi 2008 (24)</i> on page 8, DOI: <a href="http://zenodo.org/record/4532768">10.5281/zenodo.4532768</a>
Ancognatha corcuerai Figueroa and Ratcliffe, new species
No full text<i>Ancognatha corcuerai</i> Figueroa and Ratcliffe, new species <p>(Fig. 8)</p> <p>CAJAMARCA (6): Bosque de Cachil (Contumazá).</p> <p>Elevational range 2,430–2,680 m.</p>Published as part of <i>Figueroa, Luis & Ratcliffe, Brett C., 2016, A New Species Of Ancognatha Erichson (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini) From Peru, With Distributions Of Peruvian Ancognatha Species, pp. 65-72 in The Coleopterists Bulletin 70 (1)</i> on page 68, DOI: 10.1649/072.070.0107, <a href="http://zenodo.org/record/10100060">http://zenodo.org/record/10100060</a>
Ratcliffe, V P, 403373
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/412386Surname: RATCLIFFE. Given Name(s) or Initials: V P. Military Service Number or Last Known Location: 403373. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 49508.229096
Item: [2016.0049.44648] "Ratcliffe, V P, 403373
Neocorvicoana Ratcliffe and Mico
No full textKey to the species of <i>Neocorvicoana</i> Ratcliffe and Micó <p> 1. Sternites in central third with transverse field of dense, long setae. Males with dense, long setae on ventral side of tarsomeres. Parameres as in Figure 9. --------------------------------------------------------------------------- <i>N</i>. chalybea (Blanchard)</p> <p> 1 <i>9</i>. Sternites in central third glabrous. Males with sparse, short setae on ventral side of tarsomeres ------------------------------------------------------------------------------------------------------- 2</p> <p> 2. Mentum, procoxae, and tibiae usually with piceous or black setae. Pygidium and/or sternites usually with ochre or creamy white maculae or flecks (sometimes absent in females); color may be enamel­like but never with lustrous, metallic color. Mesometasternal process weakly produced anteriorly just beyond mesocoxae. Parameres as in Figure 10. ---------------------------- ------------------------------------------------------------------------------------------------------------------------------ <i>N</i>. reticulata (Kirby)</p> <p> 2 <i>9</i>. Mentum, procoxae, and tibiae usually with tawny setae. Pygidium and/or sternites usually with lustrous, metallic, pale green maculae or flecks. Mesometasternal process not produced anteriorly beyond mesocoxae. Parameres as in Figure 11. --------------------------------------------------- <i>N</i>. tricolor (Schürhoff) <b> Clave para las Especies de <i>Neocorvicoana</i> Ratcliffe and Micó</b> </p> <p> 1. Área central de los esternitos provistos de pilosidad densa, y larga. Machos con pilosidad densa y larga cubriendo la zona ventral de los tarsómeros. Parámeros como en Figure 9 ------------------------------------ <i>N</i>. chalybea (Blanchard)</p> <p> 1 <i>9</i>. Área central de los esternitos glabra. Machos con setas cortas y aisladas en la zona ventral de los tarsómeros ------------------------------------------------------------------- 2</p> <p> 2. Pilosidad del mentón, procoxas y tibias normalmente de color marrón oscuro o negra. Pigidio y/o esternitos frecuentemente con manchas de color ocre o beige (a menudo ausentes en las hembras). Colores nunca metálicos, pudiendo mostrar cierta apariencia esmaltada. Apófisis mesometasternal sobrepasando ligeramente las mesocoxas. Parameros como en Figure 10. -------------------------------------------------------------------------------- <i>N</i>. reticulata (Kirby)</p> <p> 2 <i>9</i>. Pilosidad del mentón, procoxas y tibias normalmente de color anaranjado. Pigidio y/o esternitos frecuentemente con manchas metálicas de color verdoso pálido. Apófisis mesometasternal no sobrepasando las mesocoxas. Parámeros como en.. Figure 11. --------------------------------- <i>N</i>. tricolor (Schürhoff)</p>Published as part of <i>Ratcliffe, Brett C. & Micó, Estefania, 2001, A Review Of The Neotropical Genus Neocorvicoana Ratcliffe And Micó, New Genus (Coleoptera: Scarabaeidae: Cetoniinae: Gymnetini), pp. 279-296 in The Coleopterists Bulletin 55 (3)</i> on pages 283-284, DOI: 10.1649/0010-065x(2001)055[0279:arotng]2.0.co;2, <a href="http://zenodo.org/record/4900355">http://zenodo.org/record/4900355</a>
Ratcliffe et al. 2023 - Extreme Precipitation Promotes Invasion in Managed Grasslands
No full textThis repository contains data and replication code for "Extreme Precipitation Promotes Invasion in Managed Grasslands" by Ratcliffe, Hugh; Kendig, Amy; Ahlering, Marissa; Carlson, Daren; Vacek, Sara; Dee, Laura.
The included data is a subset of the Grassland Monitoring Team dataset, collected from 2008 - 2019. These data were collected as part of a collaborative project which included the Minnesota Department of Nature Resources, the Nature Conservancy, and the US Fish and Wildlife Service.
Data are included for public record and are available for public use.
Repository Contents
1. GMT Extremes Analysis.Rmd - Contains all R code used to implement regressions and replicate results in manuscript. Instructions included within.
2. Ratcliffe et. al 2023_GMT Data.csv - Includes all data necessary to replicate results from scratch.
3. Ratcliffe et al. 2023_GMT Metadata.xlsx - Accompanying metadata and variable definitions for all variables found in Ratcliffe et. 2023_GMT Data.csv.
4. 2013_dnr_plant_status.xls - Supplemental file from the Minnesota Department of Natural Resources used to differentiate native versus invasive species.
5. 2013_dnr_plant_checklist.xls - Supplemental file from the Minnesota Department of Natural Resources used to identify indicator species.
6. Vacek 2012 - GMT Protocols - Protocol used for the collection of the vegetation data.
Vacek, S., M. Cornett, D. Carlson, and M. Ahlering. 2016. Grassland Monitoring Team Standardized Monitoring Protocol. https://ecos.fws.gov/ServCat/Reference/Profile/26773
For questions or use please contact the owner of this figshare repository, Hugh Ratcliffe, at [email protected].</p
Gorditus Ratcliffe
No full text<i>Gorditus</i> Ratcliffe, new genus <p> <b>Type species</b>. <i>Gorditus rotundus</i> here designated.</p> <p> <b>Description.</b> Body form oval (Fig. 1), highly vaulted posteriorly in lateral view (Fig. 2). Length about 22 mm. Color reddish brown. Clypeus attenuate to a narrowly truncate apex. Interocular distance equals 6 transverse eye diameters. Antenna with 10 antennomeres, club subequal in length to antennomeres 2–7. Mandibles exposed, subtriangular. Pronotum with moderately dense, large punctures; lateral margins with long, reddish brown setae. Elytra smooth, impunctate except for some minute punctures on sides in posterior half. Pygidium completely rugulopunctate. Protibia quadridentate. Metatibia at apex bluntly rounded. Metasternum with anterior half punctate and posterior half smooth. Abdominal spiracles noticeably large, directed posteriorly.</p> <p> <b>Distribution.</b> Cuba.</p> <p> <b>Diagnosis.</b> This genus shares some similarities with <i>Endroedianibe</i> Chalumeau from the Dominican Republic, namely, the plump body form and the form of the apically constricted clypeus. The male parameres are also remarkably similar to those of <i>E. bozzolai</i> Chalumeau. However, <i>G. rotundus</i> is notable for its large interocular distance (six transverse eye diameters); presence of long, reddish brown setae on the lateral margins of the pronotum; smooth elytral surface; pygidium completely rugulopunctate; metasternum with anterior half punctate and the posterior half smooth; and the remarkably large abdominal spiracles that are directed posteriorly. None of these traits are shared with <i>Endroedianibe</i> species.</p> <p>The abdominal spiracles are remarkably large and slightly protuberant, and they may have some correlation to life style or habitat. The fact that they are directed posteriorly is probably advantageous when burrowing through the soil, since soil might be less likely to enter the spiracle. However, many other soil dwelling dynastines do not have spiracles of this nature and seem not to have a problem with soil entering the spiracular opening. For the moment, then, the form of these unique spiracles remains an enigma.</p> <p> <b>Etymology.</b> From the Spanish word “gordo,” meaning fat or plump, here used in the diminutive form, “gordito” for “little fat one” in reference to the small, plump body size. The genus is masculine in gender.</p>Published as part of <i>Ratcliffe, Brett C., 2010, Gorditus rotundus, a new genus and species of Pentodontini from Cuba (Coleoptera: Scarabaeidae: Dynastinae), pp. 56-60 in Zootaxa 2683</i> on pages 57-59, DOI: <a href="http://zenodo.org/record/199376">10.5281/zenodo.199376</a>
Pedagogical content knowledge for teaching concepts of the nature of science
No full textThis conference contribution seeks to provoke discussion of the question: If pedagogical content knowledge (PCK) can be represented for key science concepts, can it be established for aspects of the nature of science?’ I start from the premise that explicit, rather than implicit, teaching of aspects of the processes and practices of science is now expected in science curricula (variously labelled as ‘how science works’, ‘ideas-about-science’, ‘nature of science’), presenting challenges in classroom practice. The evidence base for understanding effective teaching and learning of the nature of science is developing but still limited. Much early research took the perspective that if teachers have a good understanding of the nature of science sound practice will follow. More recently, research projects have suggested a complex relationship between teachers’ understanding and their classroom practice. Little is known about how pupils develop and progress their understanding of the nature of science, adding to the difficulties in curriculum design and in understanding the PCK needed for effective practice. Nonetheless these are not reasons for not attempting to gain a better understanding of PCK for the nature of science. This contribution attempts to promote discussion of how barriers to understanding may be overcome. It will present examples of seeking PCK
Violation of the bjorken sum rule and system of equations in recent nucleon spin measurements
No full textWe discuss the status of the Bjorken sum rule in the light of the recent data on the spin structure functions of i) the deuteron obtained by the SMC group at CERN and ii) the neutron by the E142 group at SLAG. Combining the new data with that already obtained for the proton by the EMC group and earlier SLAC/YALE collaborations, and also with stringent bounds obtained on the strange-quark polarisation, we deduce that the Bjorken system of equations is violated at worse than a 2 sigma level. We also show that arguments based on possible higher-twist contributions are unable to account for this discrepancy. In conclusion, an explanation in terms of non-perturbative renormalisation of the relevant Wilson coefficients is presented
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