Autor: Richter, U. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Velociraptorine dromaeosaurid teeth from the Kimmeridgian [Late Jurassic] of Germany
Autorzy:: van der Lubbe, T
Richter, U.
Knotschke, N.
Powiązania:: https://bibliotekanauki.pl/articles/21506.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: velociraptorine dromaeosaurid
tooth
Kimmeridgian
Late Jurassic
Jurassic
Germany
Saurischia
Theropoda
Dromaeosauridae
dromaeosaurid
paleontology
Opis:: Six theropod teeth from a Late Jurassic (Kimmeridgian) bone bed in Langenberg Quarry of Oker (Goslar, Germany) are identified as a new dromaeosaurid taxon, here left in open nomenclature. Direct comparison reveals that the teeth are very similar to velociraptorine dromaeosaurid teeth from the Guimarota coal mine (Late Jurassic, Portugal) and to velociraptorine dromaeosaurid teeth from Uña (Barremian, Cuenca Province, Spain). Our data indicate that the teeth from the Kimmeridgian of Lower Saxony are of velociraptorine dromaeosaurid type, and therefore represent one of the oldest occurrences of the group Dromaeosauridae.
Źródło:: Acta Palaeontologica Polonica; 2009, 54, 3; 401-408
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Approach for the Developmentof Energy-Efficient Machine Tools
Autorzy:: Neugebauer, R.
Frieß, U.
Paetzold, J.
Wabner, M.
Richter, M.
Powiązania:: https://bibliotekanauki.pl/articles/971148.pdf
Data publikacji:: 2009
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: energy efficiency
machine tool
product development
Opis:: The life cycle costs of machine tools are much higher determined by their energy costs than what is often roughly assessed. The growing demand for consumer goods and especially possibilities of individual mobility in major parts of the developing world - e. g. Asia - will lead to serious problems in meeting the demand for an abundant energy supply and will increase the cost for energy further in the near-term future. Harder efforts are necessary to "reach more with less" - using less energy than today to reach a defined goal in production. The paper deals with a methodology to design machine tools with a high "energy efficiency". Based on the property-driven design methodology by Weber a systematic approach is shown to enhance the design of machine tools. Energy efficiency is a new additional and central property in the design process. To attain these given properties characterisations are determined by the engineer to fulfil these properties. On the developing-path the characterisations are defined in more detail step by step, and after each step it is assured if the accounted properties where met by the defined characteristics. The approach is to first analyse existing machine tools and therefore define prior energy consumers. The identified major consumers are afterwards systematically addressed to reduce their energy consumption. The result is an enhanced machine tool with state-of-the-art energy usage. This addresses the objectives of the EU and takes pressure of the energy supply by reducing the energy demand in production.
Źródło:: Journal of Machine Engineering; 2009, 9, 2; 51-62
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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