Results 1 to 10 of about 34,048 (263)
Evaluation of the concentration of point defects in GaN
Scientific Reports, 2017 AbstractPhotoluminescence (PL) was used to estimate the concentration of point defects in GaN. The results are compared with data from positron annihilation spectroscopy (PAS), secondary ion mass spectrometry (SIMS), and deep level transient spectroscopy (DLTS).
M. A. Reshchikov +8 more
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CONCENTRATION OF POINTS ON MODULAR QUADRATIC FORMS [PDF]
International Journal of Number Theory, 2011 Let Q(x, y) be a quadratic form with discriminant D ≠ 0. We obtain non-trivial upper bound estimates for the number of solutions of the congruence Q(x, y) ≡ λ ( mod p), where p is a prime and x, y lie in certain intervals of length M, under the assumption that Q(x, y) - λ is an absolutely irreducible polynomial modulo p.
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Spatial point pattern analysis and industry concentration [PDF]
The Annals of Regional Science, 2010 Traditional measures of spatial industry concentration are restricted to given areal units. They do not make allowance for the fact that concentration may be differently pronounced at various geographical levels. Methods of spatial point pattern analysis allow to measure industry concentration at a continuum of spatial scales.
Reinhold Kosfeld +2 more
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Sample concentration and purification for point-of-care diagnostics [PDF]
2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2012 The ability to increase the concentration of target analytes in a fixed sample volume can potentially lower the limit of detection for many biosensing techniques, and thus is key in sample preparation for infectious disease diagnosis. Concentration by evaporation is an effective method to achieve target enrichment. However, concentrating human samples,
Nga T. Ho +3 more
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Point of Care and Factor Concentrate-Based Coagulation Algorithms [PDF]
Transfusion Medicine and Hemotherapy, 2015 In the last years it has become evident that the use of blood products should be reduced whenever possible. There is increasing evidence regarding serious adverse events, including higher mortality and morbidity, related to transfusions. The use of point of care (POC) devices integrated in algorithms is one of the important mechanisms to limit blood ...
Theusinger, Oliver M +2 more
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Point Defect Concentrations in Metastable Fe-C Alloys [PDF]
Physical Review Letters, 2006 Point defect species and concentrations in metastable Fe-C alloys are determined using density functional theory and a constrained free-energy functional. Carbon interstitials dominate unless iron vacancies are in significant excess, whereas excess carbon causes greatly enhances vacancy concentration.
Foerst, Clemens J. +3 more
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Concentrated and rarified sets of points [PDF]
Acta Mathematica, 1933 I have arrived at the definition of concentra ted sets f rom the following two similar problems: P rob lem I. What are the linear sets whose measure with respect to any continuous monotone function q~ (1) is zero? Problem II . What are the linear sets on which the variation of any continuous monotone function is zero?
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Concentration points for Fuchsian groups
Topology and its Applications, 2000 A limit point p of a discrete group of Mobius transformations acting on S^n is called a concentration point if for any sufficiently small connected open neighborhood U of p, the set of translates of U contains a local basis for the topology of S^n at p.
Hong, Sungbok, McCullough, Darryl
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Journal of Functional Analysis, 2003 In this paper the authors give a concentration result for maximizing sequences for the variational problem \[ S^F_\varepsilon(\Omega)=\frac{1}{\varepsilon^{2^*}} \sup \left\{ \int _\Omega F(u):\int _\Omega | \nabla u| ^2\leq \varepsilon ^2, u=0 \text{ on }\partial \Omega \right\}, \] with \(0\leq F(t)\leq \alpha | t| ^{2^*}\) and \(\Omega\subset R^n\) (
GARRONI, Adriana, S. Muller
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Bounds for the points of spectral concentration of Sturm–Liouville problems
Mathematika, 2000 The authors study the Sturm-Liouville problem \[ \begin{aligned} & y''+(\lambda-q(x))y=0,\quad x\in [0, \infty),\tag{1}\\ &y(0)\cos\alpha+y'(0)\sin\alpha=0\quad\text{for some} \quad \alpha\in [0,\pi).\tag{2}\\ \end{aligned} \] Here, \(q\) is a real valued function from \(L^1(0,\infty)\) and there exist \(\lambda_0\geq 0\) and functions \(a(x)\) and ...
Gilbert, Daphne, Harris, B.J.
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