10,472 research outputs found
Derecyrta beechei D.R. Smith, 1995, details
No full text<p><strong><em>Derecyrta beechei</em></strong> D.R. Smith, 1995, female</p>
<p>Original description: Smith, D. R. 1995: A new species of Xiphydriidae (Hymenoptera) from Chile. - Revista Chilena de Entomologia., Santiago (Chile) 22: 21-24.</p>
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<p>Photos were taken at the SDEI with a Leica DFC 495 digital camera and M205 C microscope. Composite images with an extended depth of field were created from stacks of images using the software CombineZ5.3, and finally arranged and partly enhanced with Ulead PhotoImpact X3.</p>
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Derecyrta beechei D.R. Smith, 1995, complete views
No full text<p><em><strong>Derecyrta beechei</strong></em> D.R. Smith, 1995, female</p>
<p>Original description: Smith, D. R. 1995: A new species of Xiphydriidae (Hymenoptera) from Chile. - Revista Chilena de Entomologia., Santiago (Chile) 22: 21-24.</p>
<p>Photos were taken at the SDEI with a Leica DFC 495 digital camera and M205 C microscope. Composite images with an extended depth of field were created from stacks of images using the software CombineZ5.3, the parts are fused with Microsoft Image Composite Editor 1.4.4.0, and finally arranged and partly enhanced with Ulead PhotoImpact X3.</p
Derecyrta beechei D.R. Smith, 1995, from Chile
No full text<p><em><strong>Derecyrta beechei</strong></em> D.R. Smith, 1995, female</p>
<p>Original description: Smith, D. R. 1995: A new species of Xiphydriidae (Hymenoptera) from Chile. - Revista Chilena de Entomologia., Santiago (Chile) 22: 21-24.</p>
<p>Notes.</p>
<p>The specimen has vein 2r in the right forewing missing.</p>
<p>The mandibles are black (not dark reddish brown).</p>
<p>The genal carina is indicated, perhaps caused by pits in this area</p>
<p>Photos were taken at the SDEI with a Leica DFC 495 digital camera and M205 C microscope. Composite images with an extended depth of field were created from stacks of images using the software CombineZ5.3, and finally arranged and partly enhanced with Ulead PhotoImpact X3.</p
Polymer multimode waveguide optical and electronic PCB manufacturing
No full textThe paper describes the research in the £1.3 million IeMRC Integrated Optical and Electronic Interconnect PCB Manufacturing (OPCB) Flagship Project in which 8 companies and 3 universities carry out collaborative research and which was formed and is technically led by the author. The consortium’s research is aimed at investigating a range of fabrication techniques, some established and some novel, for fabricating polymer multimode waveguides from several polymers, some formulations of which are being developed within the project. The challenge is to develop low cost waveguide manufacturing techniques compatible with commercial PCB manufacturing and to reduce their alignment cost. The project aims to take the first steps in making this hybrid optical waveguide and electrical copper track printed circuit board disruptive technology widely available by establishing and incorporating waveguide design rules into commercial PCB layout software and transferring the technology for fabricating such boards to a commercial PCB manufacturer. To focus the research the project is designing an optical waveguide backplane to tight realistic constraints, using commercial layout software with the new optical design rules, for a demonstrator into which 4 daughter cards are plugged, each carrying an aggregate of 80 Gb/s data so that each waveguide carries 10 Gb/s
Paleolithic archaeology at the Swan Valley Community School, Swanscombe, Kent
No full textThis paper reports on the recovery of Palaeolithic flint artefacts and faunal remains from fluvial gravels at the base of a sequence of Pleistocene sediments revealed during construction works at two sites to the south of Swanscombe village. Although outside the mapped extent of the Boyn Hill/Orsett Formation, the newly discovered deposits can be firmly correlated with the Middle Gravels and Upper Loam from the Barnfield Pit sequence dating to c. 400,000-380,000 BP. This increases greatly the known extent of these deposits, one horizon of which produced the Swanscombe Skull, and has provided more information on their upper part.Comparison of the lithic assemblages from volume-controlled sieving with those from general monitoring demonstrated that artefact collections formed without controlled methods of recovery, such as form the majority of the Lower and Middle Palaeolithic archaeological record, are likely to be disproportionately dominated by larger, more visible and more collectable neatly made handaxes to the detriment of more poorly made, asymmetrical handaxes and cores, flakes and percussors. The lithic assemblage from the fluvial gravel was confirmed as dominated by pointed handaxes, supporting previous studies of artefacts from the equivalent Lower Middle Gravel at Barnfield Pit. The raw material characteristics of the assemblage were investigated, and it was concluded that there was no indication that the preference for pointed shapes could be related to either the shape or source of raw material.This paper also reviews the significance of lithic assemblages from disturbed fluvial contexts, and concludes that, contrary to some current perspectives, they have a valuable role to play complementing less disturbed evidence in developing understanding of the Palaeolithic
turneri
No full text×Elyleymus turneri (Lepage) Barkworth & D.R. DeweyTurner's wildryeEdge of river bank just north of the Alex smith farm, 2 miles N.E. of fort SaskatchewanEdge of river ban
<i>Takashius </i>nom. nov. (Neogastropoda: Buccinoidea: Fasciolariidae), a replacement name for <i>Okutanius </i>Kantor <i>et al</i>., 2018 non D.R. Smith, 1981
No full textInternational audienceThe new replacement name Takashius nom. nov. is proposed to solve the homonymy between the fasciolariid genus Okutanius Kantor et al., 2018 and the hymenopteran genus Okutanius D.R. Smith, 1981
Un dictionnaire de géographie humaine : R.J. Johnston, The Dictionary of Human Geography, en coll. avec D. Gregory, Peter Haggett, D.M. Smith, D.R. Stoddart
No full textUn dictionnaire de géographie humaine : R.J. Johnston, The Dictionary of Human Geography, en coll. avec D. Gregory, Peter Haggett, D.M. Smith, D.R. Stoddart. In: Annales de Géographie, t. 93, n°515, 1984. p. 82
Un dictionnaire de géographie humaine : R.J. Johnston, The Dictionary of Human Geography, en coll. avec D. Gregory, Peter Haggett, D.M. Smith, D.R. Stoddart
No full textUn dictionnaire de géographie humaine : R.J. Johnston, The Dictionary of Human Geography, en coll. avec D. Gregory, Peter Haggett, D.M. Smith, D.R. Stoddart. In: Annales de Géographie, t. 93, n°515, 1984. p. 82
Notes on two unusual species of Symphyta (Hymenoptera: Pergidae, Xiphydriidae) from Chile, with the first report of a gall-inducing sawfly from the Neotropical Region
No full textWe report the southernmost record (Huinay Scientific Field Station: 42°22 ́ S, 72°24 ́ W, Comau, chilean Patagonia ) for the sawfly Philoperra obscura Smith (Pergidae) and add new morphological and biological data on this poorly known species. The individuals of P. obscura known so far appear to morphologically differ in the number of antennomeres, forewing anal cell shape, and color of the first abdominal tergum and of the hind tibia. The individual at Huinay was collected from inside a gall on Nothofagus betuloides Mirb. (Oerst.) (Nothofagaceae), thus resulting in the first report of a gall-forming sawfly from the Neotropical Region. An individual of a second sawfly species, Derecyrta beechei Smith (Xiphydriidae), was also collected at Huinay and presented some differences with the previously known individuals in forewing venation and color of the mandibles.Se cita el registro más al sur (Estación Científica Huinay: 42°22 ́ S, 72°24 ́ W, Patagonia chilena) de la avispa porta-sierra Philoperra obscura Smith (Pergidae) y se aportan nuevos datos morfológicos y biológicos sobre esta poco conocida especie. Los individuos de P. obscura conocidos hasta ahora difieren en algunos rasgos morfológicos, como el número de antenómeros, forma de la celda anal del ala anterior, y en el color del primer terguito abdominal y de la tibia posterior. El ejemplar de Huinay fue extraido de una agalla en Nothofagus betuloides Mirb. (Oerst.) (Nothofagaceae), lo que representa el primer registro de una avispa porta-sierra inductora de agallas en la Región Neotropical. Se colectó también en Huinay un ejemplar de una segunda especie de avispas porta-sierra, Derecyrta beechei Smith (Xiphydriidae), que también presenta algunas diferencias morfológicas con los esca-sos ejemplares conocidos hasta ahora, en caracteres de la venación alar y color de las mandíbulas
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