نتایج جستجو برای: rapid
تعداد نتایج: 303979 فیلتر نتایج به سال:
In terms of the duality property of injective preenvelopes and flat precovers, we get an equivalent characterization of left Noetherian rings. For a left and right Noetherian ring R, we prove that the flat dimension of the injective envelope of any (Gorenstein) flat left R-module is at most the flat dimension of the injective envelope of RR. Then we get that the injective envelope of RR is (Gor...
Rapid prototyping is a development method that may or may not be e ective in improving software products and process. Assessing the e ectiveness of rapid prototyping requires empirical data. We analyze 39 published and unpublished \real world" case studies of the use of rapid prototyping for developing software products. By identifying e ects mentioned in multiple sources, we are able to extrac...
Companies adopt the strategy of producing variety of products to be competitive and responsive to market. Product variation is becoming an important factor in companies’ ability to accurately meet customer requirements. Ever increasing consumer options mean that customers have more choices than ever before which put commercial pressures on companies to continue to diversify. This can be a parti...
in this study, a simple, rapid and selective method was developed for the determination of dexamethasone. the proposed method is based on inhibitory effect of dexamethasone on the oxidation of orange-g by bromate in sulfuric acid media. the reaction was followed spectrophotometrically at 478.5 nm (?max). under optimum experimental conditions, (72.6 ?mol l-1 of orange-g, 0.76 mol l-1 of h2so4, 0...
A method for creating planar As2S3 waveguides with a minimum of processing steps is proposed, and the resulting waveguides have been characterized. When the processing parameters are optimized, the losses are low enough for practical use. The authors demonstrate this by creating serpentine waveguides with multiple bends and lengths in excess of 23cm. Keywords-component; chalcogenide glass; opti...
A ring R is called right א0-injective if every right homomorphism from a countably generated right ideal of R to RR can be extended to a homomorphism from RR to RR. In this note, some characterizations of א0-injective rings are given. It is proved that if R is semiperfect, then R is right א0injective if and only if every homomorphism from a countably generated small right ideal of R to RR can b...
Rapid Prototyping ist in der Industrie ein Fertigungsverfahren, bei dem ohne manuelle Umwege 3D-Modelle in Produkte umgesetzt werden. Nach mehr als 30 Jahren Industrieeinsatz ist dieses Verfahren mit dem 3D-Drucker auch für die Schule einsetzbar geworden. Die Schülerinnen und Schüler können alle Phasen der Modellerstellung und Modellumwandlung selbst gestalten und die einzelnen Arbeitsschritte ...
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