SUMMARY Details are given of the static calibration of a hemispherrcal-headed drfferentral pressure yawmeter, 0.6 to 1.2; rn the Mach number range from the xnstrument has a central pitot pressure hole and two pairs of holes m perpendroular planes for flow directron measurement. The results show that ths sensitivity to yaw (for angles up to 8') as determined from pressure differences between opp...

BSMV infection caused a pronounced increase in the frequency of triploid and aneuploid seeds in eleven barley varieties, but with considerable variation in frequency among varieties. In some of the varieties triploids exceeded three per cent. In virus-free material a few triploids were found in most of the varieties, but the frequency was very low. There was, however, a significant variation am...

The abnormal Brfnsted slopes observed for nitroalkanes are interpreted as a variation in the work terms, which is caused by a variation in hydrogen bond strengths with the free energy for proton transfer, rather than as an anomaly in the proton-transfer stage itself.

The stability o f n onm onoton ic equilibria o f the V lasov-Poisson equation is assessed by using nonlinear constants o f m otion . The constants o f m otion m ake up the free energy o f the system , which upon variation y ields nonm onotonic equ ilibria . Such equilibria have not previously been obtainable from a variation principle, but here this is accom plished by the inclusion o f a passi...

The goal of this paper is to derive in the two-dimensional case necessary and sufficient minimality conditions in terms of the second variation for the functional v 7→ ∫ Ω ( |∇v| + χ{v>0}Q ) dx, introduced in a classical paper of Alt and Caffarelli. For a special choice of Q this includes water waves. The second variation is obtained by computing the second derivative of the functional along su...

We present quantitative models that unify several adaptive hypotheses for the evolution of cooperative breeding in a single framework: the ecological constraints hypothesis, the life-history hypothesis and the benefits-of-philopatry hypothesis. Our goal is to explain interspecific variation in the occurrence of cooperative breeding in terms of interspecific variation in life-history traits and ...

As pointed out by Coetzee (2009), the study of what is still often called “free variation” (but not by those who study it) has followed a largely parallel history to the development of Generative Phonology following SPE. Weinreich et al. (1968) stands as the programmatic document for the subfield of Variationism, and was published the same year as SPE. Since that time, variation theory has cont...

Previous experimental studies suggest that the mutation rate is nonuniform across the yeast genome. To characterize this variation across the genome more precisely, we measured the mutation rate of the URA3 gene integrated at 43 different locations tiled across Chromosome VI. We show that mutation rate varies 6-fold across a single chromosome, that this variation is correlated with replication ...

This paper reconsiders the status of parameters and parametric variation from the perspective of recent developments within the minimalist program, in particular the problem that arises if parameters can no longer be part of UG, which must be maximally empty, and if variation is instead to be explained in terms of third-factor considerations (section 1). I pursue the idea that variation arises ...

Calculations based on the usual one-dimensional theory of piezoelectric rystal systems have been carried out for several particular variable resonant frequency crystal systems radiating into water. Curves are presented showing the (1) power output as a function of frequency for operation both on and off resonance, (2) resonant frequency shift as a function of backing length, and (3) relative ba...