نتایج جستجو برای: ur
تعداد نتایج: 3566 فیلتر نتایج به سال:
10.1080/17439880902923564 Learning, Media and Technology 743-9884 (print)/1743-9892 (online) Original Article 2 09 Taylor & Francis 34 0 0002009 ynds yGrant .G [email protected] Alongside other forms of social software, wikis have been heralded as supporting more collaborative and democratic teaching and learning practices. This paper explores, through a case study approach, the use of wikis t...
1. INRA, Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 06900 Sophia Antipolis, France. 2. Commissariat à l’Energie Atomique (CEA), Institut de Génomique (IG), Genoscope, Evry, BP5706, 91057, France. 3. INRA, CNRS, UMR 441-2594, Laboratoire des Interactions Plantes-Microorganismes (LIPM), CastanetTolosan, F-31326, France 4. Université Libre de Bruxelles (ULB), Evo...
The shift from derivational rules to representational constraints that characterizes much contemporary work in phonology calls for a serious reevaluation of the notion of Underlying Representation (UR). The reason is that the ability of constraints to apply "in parallel" systematically obviates the need for a derivation. The purpose of this paper is to argue, consistently with my (1994) Princip...
The next-to-leading order QCD corrections to the production of gluino pairs at the Tevatron are presented in this paper. Similar to the production of squark-antisquark pairs, the dependence of the cross section on the renormalization/factorization scale is reduced considerably by including the higher-order corrections. The cross section increases with respect to the lowest-order calculation whi...
The quantum theory of ur-objects proposed by C. F. von Weizsäcker has to be interpreted as a quantum theory of information. Ur-objects, or urs, are thought to be the simplest objects in quantum theory. Thus an ur is represented by a twodimensional Hilbert space with the universal symmetry group SU(2), and can only be characterized as one bit of potential information. In this sense it is not a s...
In this paper we consider the nonlinear wave equation problem utt −B ` ‖u‖0, ‖ur‖0 ́ (urr + 1 r ur) = f(r, t, u, ur), 0 < r < 1, 0 < t < T, ̨̨ lim r→0+ √ rur(r, t) ̨̨ <∞, ur(1, t) + hu(1, t) = 0, u(r, 0) = e u0(r), ut(r, 0) = e u1(r). To this problem, we associate a linear recursive scheme for which the existence of a local and unique weak solution is proved, in weighted Sobolev using standard compa...
Usefulness of Urea as a Means of Improving the Solubility of Poorly Water-Soluble Ascorbyl Palmitate
The aim of this study was to evaluate complexes of L-ascorbyl palmitate (ASCP) and urea (UR). This evaluation involved differential scanning calorimetry (DSC), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), near-infrared spectroscopy (NIR), a solubility test, a 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging test, and a mushroom tyrosinase inhibition assay. Physico...
The accumulation and removal of transposable elements (TEs) is a major driver of genome size evolution in eukaryotes. In plants, long terminal repeat (LTR) retrotransposons (LTR-RTs) represent the majority of TEs and form most of the nuclear DNA in large genomes. Unequal recombination (UR) between LTRs leads to removal of intervening sequence and formation of solo-LTRs. UR is a major mechanism ...
Fibronectin-binding proteins (FnBPs) of Staphylococcus aureus and Streptococcus pyogenes mediate invasion of human endothelial and epithelial cells in a process likely to aid the persistence and/or dissemination of infection. In addition to binding sites for the N-terminal domain (NTD) of fibronectin (Fn), a number of streptococcal FnBPs also contain an upstream region (UR) that is closely asso...
AIMS The study was designed to test the influence of the temporal resolution, at which tissue Doppler imaging (TDI) and speckle tracking imaging (STI) operate, on the accurate assessment of left ventricular (LV) untwist rate (UR). METHODS AND RESULTS Echo imaging and invasive LV pressure measurements were performed during right atrial (RA) pacing and dobutamine challenge in eight pigs. LV tor...
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