نتایج جستجو برای: layered circular blank
تعداد نتایج: 107642 فیلتر نتایج به سال:
Introduction: The acoustic performance of natural fiber adsorbents has been investigated in numerous studies. A part of these materials show a poor adsorption within the frequency range of less than 1000 Hz. In the present study, attempts were made to investigate the effect of layout sequence of double-layered composites consisting of natural and synthetic fibers on improving the acoustic adsor...
RDF data is set apart from relational or XML data by its support of rich existential information in the form of blank nodes. Where in SQL databases null values are scoped over a single tuple, blank nodes in RDF can span over any number of statements and thus can be seen as existentially quantified variables. Blank node querying is considered in most RDF query languages, but blank node construct...
Contaminant carbon (blank carbon) was studied for its impact on the carbon isotope measurements (∆14C and δ13C) of 3 organic compound classes of oceanic particulate organic matter. Two methods of blank correction and associated uncertainties were studied. First, the carbon blanks were quantified manometrically and the isotope ratios of the blank carbon were measured directly. Second, the isotop...
The 28 Eurasian species of Xyela Dalman, 1819 are revised based on material of ca 7,500 imagines including about 10 % reared specimens. Larvae of Eurasian Xyela usually are monophagous and feed inside the staminate cones of pines (Pinus spp., Pinaceae). Based on the reared material, on identification by barcoding and on additional collection observations, the larval host associations for the Xy...
Im Informatikunterricht werden Datenbanken entweder vom Ansatz des Anwendens oder des Modellierens behandelt. Diese beiden Ansätze sind als „Verwenden von Strukturen“ bzw. „Erzeugen von Strukturen“ zueinander komplementär, vernachlässigen aber häufig die Rückkoppelung des durch die Datenbank repräsentierten Modells mit dem modellierten Realweltausschnitt. Dieser Artikel beschreibt erste Erfahru...
Der Beitrag entstand im Rahmen der Veranstaltung »eCulture Trends 06: Zukunft entwickeln – Arbeit erfinden«, die am 20. Oktober 2006 von der Projektgruppe eCulture Factory des Fraunhofer IAIS in Bremen veranstaltet wurde.
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