نتایج جستجو برای: photon correlation spectroscopy

تعداد نتایج: 607510  

Journal: :The European physical journal. E, Soft matter 2014
Fabrizio Croccolo Henri Bataller Frank Scheffold

In a binary fluid mixture subject to gravity and a stabilizing concentration gradient, concentration non-equilibrium fluctuations are long-ranged. While the gradient leads to an enhancement of the respective equilibrium fluctuations, the effect of gravity is a damping of fluctuations larger than a "characteristic" size. This damping is visible both in the fluctuation power spectrum probed by st...

2008
Jing Yang Bin Wang

[1] Over the South China Sea, the year-to-year variations in the intensity of the quasi-biweekly (QBW) and 30–50-day oscillations during June–July are anti-correlated. An explanation is offered for the out-of-phase relationship. We found during strong QBW years, the June–July mean convection and easterly vertical shear are enhanced over the equatorial western-central Pacific, with corresponding...

2007
Andrei A. Krokhin Dietmar Schweigert

It is proved that if a nite non-trivial quasi-order is not a linear order then there exist 2 @ 0 clones, which consist of functions preserving the quasi-order and contain all unary functions with this property. It is shown that, for a linear order on a three-element, there are only 7 such clones.

Journal: :Journal of magnetic resonance 2004
Charles L Epstein

This paper considers a variety of problems in the design of selective RF-pulses. We apply a formula of Zakharov and Manakov to directly relate the energy of an RF-envelope to the magnetization profile and certain auxiliary parameters used in the inverse scattering transform (IST) approach to RF-pulse synthesis. This allows a determination of the minimum possible energy for a given magnetization...

2007
J. S. Urbach E. R. Weeks Harry L. Swinney

2016
Qingteng Zhang Eric M. Dufresne Pawel Grybos Piotr Kmon Piotr Maj Suresh Narayanan Grzegorz W. Deptuch Robert Szczygiel Alec Sandy

Small-angle scattering X-ray photon correlation spectroscopy (XPCS) studies were performed using a novel photon-counting pixel array detector with dual counters for each pixel. Each counter can be read out independently from the other to ensure there is no readout dead-time between the neighboring frames. A maximum frame rate of 11.8 kHz was achieved. Results on test samples show good agreement...

Journal: :Journal of epidemiology and community health 1999
A Lloyd

OBJECTIVES To introduce the UK SF36 Version II (SF36-II), and to (a) gain population norms for the UK SF36-II in a large community sample as well as to explore the instrument's internal consistency reliability and construct validity, and (b) to derive the Physical Component Summary (PCS) and Mental Component Summary (MCS) algorithms for the UK SF36-II. DESIGN Postal survey using a questionnai...

2001
PAULO SALGADO

– A hierarchical fuzzy model is proposed in this paper. The concept of relevance has enabled the measurement of the relative importance of rule sets and the Separation of Linguistic Information Methodology (SLIM) provided a means to organize its information in different structures. Based on this methodology a new SLIM-PCS algorithm is proposed for the Parallel Collaborative Structure (PCS). As ...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2011
Céline Durand-Gasselin Nicolas Sanson Nicolas Lequeux

Aggregation of thermosensitive polymer-coated gold nanoparticles was performed in aqueous solution in the presence of a triblock copolymer poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (Pluronic P123, PEO(20)-PPO(68)-PEO(20)). The gold nanoparticles, AuNPs, which are covered by thermosensitive statistical copolymers poly(EO(x)-st-PO(y)), aggregate when the temperat...

Journal: :Physical review letters 2000
D N Petsev P G Vekilov

We have studied molecular interactions in solutions of the protein apoferritin by static and dynamic light scattering. When plotted against the electrolyte concentration, the second osmotic virial coefficient exhibits a minimum. The ascending branch of this dependence is a manifestation of a surprisingly strong repulsion between the molecules at electrolyte concentrations about and above 0.2M, ...

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