منابع مشابه
Publishing 1757 - 2223
There are many ways an organization can approach innovation. On one end of the spectrum an organization can choose to have everyone submit any idea. On the other, innovation can be generated from a small, dedicated group of specialists. In the middle there are many variations along the way. This paper discusses the open innovation typology and the options for an organization making the decision...
متن کاملتعیین میزان سرب و کل مواد آلی در ذرات رسوب شونده (dust fall) هوای شهر کرمان
چکیده ندارد.
15 صفحه اولPrecursor Size Effects on Kinetics Parameters of Bi-2223 Growth
The Bi-2223 phase growth was studied on the view growth Kinetics and described by using suggested kinetic equations, and the kinetics parameters of the 2223 growth were experimentally determined. The precursor particle size effect on Bi-2223 phase growth was studied, as well. Precursors in this experiment were made by four different techniques with different particle sizes, and samples were sin...
متن کاملEffect of Co3O4 Nanoparticles Addition on (Bi,Pb)-2223 Superconductor
The effect of nano Co3O4 addition on the superconducting properties of (Bi, Pb)-2223 system was studied. The samples were prepared by the acetate coprecipitation method. The Co3O4 with different sizes (10-30 nm and 30-50 nm) from x=0.00 to 0.05 was added to Bi1.6Pb0.4Sr2Ca2Cu3Oy(Co3O4)x. Phase analysis by XRD method, microstructural examination by SEM and dc electrical resistivity by four point...
متن کاملOn 3-coloured tournaments
We (re-)prove that in every 3-edge-coloured tournament in which no vertex is incident with all colours there is either a cyclic rainbow triangle or a vertex dominating every other vertex monochromatically.
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ژورنال
عنوان ژورنال: Nature
سال: 1903
ISSN: 0028-0836,1476-4687
DOI: 10.1038/067391b0