Fluctuations in Saffman-Taylor fingers with quenched disorder

We make an experimental characterization of the effect that static disorder has on the shape of a normal Saffman-Taylor finger. We find that static noise induces a small amplitude and long wavelength instability on the sides of the finger. Fluctuations on the finger sides have a dominant wavelength, indicating that the system acts as a selective amplifier of static noise. The dominant wavelength does not seem to be very sensitive to the intensity of static noise present in the system. On the other hand, at a given flow rate, rms fluctuations of the finger width, decrease with decreasing intensity of static noise. This might explain why the sides of the fingers are flat for typical Saffman-Taylor experiments. Comparison with previous numerical studies of the effect that temporal noise has on the Saffman-Taylor finger, leads to conclude that the effect of temporal noise and static noise are similar. The behavior of fluctuations of the finger width found in our experiments, is qualitatively similar to one recently reported, in the sense that, the magnitude of the width fluctuations decays as a power law of the capillary number, at low flow rates, and increases with capillary number for larger flow rates.

Audit report on Taylor County, Iowa for the year ended June 30, 2011

Audit report on Taylor County, Iowa for the year ended June 30, 2011

8

Comparing data on offences known to the police in 37 European countries for the year 1999, this chapter shows empirically how the counting rules use to collect data for police statistics in each country affect the outcome of such statistics and constitute one of the main explanation of cross-national differences in levels of recorded crime. Thus, countries recording offences when they are reported to the police present higher crime rates than countries recording offences when the police have completed the investigation. The chapter also shows that comparisons of homicide rates should only be made using data for completed intentional homicide (i.e. excluding attempts).

Audit report on Taylor County, Iowa for the year ended June 30, 2012

Audit report on Taylor County, Iowa for the year ended June 30, 2012

Audit report on the Taylor County Early Childhood Iowa Area for the year ended June 30, 2012

Audit report on the Taylor County Early Childhood Iowa Area for the year ended June 30, 2012

Audit report on Taylor County, Iowa for the year ended June 30, 2013

Audit report on Taylor County, Iowa for the year ended June 30, 2013

Audit report on the Taylor County Early Childhood Iowa Area for the year ended June 30, 2013

Audit report on the Taylor County Early Childhood Iowa Area for the year ended June 30, 2013

Meta-structure correlation in protein space unveils different selection rules for folded and intrinsically disordered proteins

The number of existing protein sequences spans a very small fraction of sequence space. Natural proteins have overcome a strong negative selective pressure to avoid the formation of insoluble aggregates. Stably folded globular proteins and intrinsically disordered proteins (IDP) use alternative solutions to the aggregation problem. While in globular proteins folding minimizes the access to aggregation prone regions IDPs on average display large exposed contact areas. Here, we introduce the concept of average meta-structure correlation map to analyze sequence space. Using this novel conceptual view we show that representative ensembles of folded and ID proteins show distinct characteristics and responds differently to sequence randomization. By studying the way evolutionary constraints act on IDPs to disable a negative function (aggregation) we might gain insight into the mechanisms by which function - enabling information is encoded in IDPs.

Audit report on Taylor County, Iowa for the year ended June 30, 2014

Audit report on Taylor County, Iowa for the year ended June 30, 2014

Enquête sur la mode féminine : [plaquette de prestige] / High-Life Taylor ; [texte signé J.R.] ; [ill. de Bernard B. de Monvel, Maurice Leloir, L. Sabattier,...]

Mécénat texte imprimé : Cet ouvrage a été numérisé grâce à Myriam Lenourry