Let f be a real arithmetic function and ∆(n, f) := sup u2R, 06v61 ���� X d|n eu<d6eu+v f(d) ���� denote the corresponding generalization of Hooley’s Delta-function. We investigate weighted moments of ∆(n; f) for oscillating functions f , typical cases being those of a non principal Dirichlet character or of the Möbius function. We obtain, in particular, sharp bounds up to factors (log x)o(1) fo...

According to the composite-stimulus control model (Weiss, 1969, 1972b), an individual discriminative stimulus (S(D)) is composed of that S(D)'s on-state plus the off-states of all other relevant S(D)s. The present experiment investigated the reversibility of composite-stimulus control. Separate groups of rats were trained to lever-press for food whenever a tone or a light S(D) was present. For ...

Skalka B.: Antagonistic Effect of Staphylococcus hyicus and Staphylococcus chromogenes Exhibited on Staphylococcal Delta Hemolysin. Acta vet. Bmo, 60,1991: 61-69. Staphylococcus hyicus and Staphylococcus chromo genes are able to inhibit hemolytic effect of the staphylococcal delta hemolysin on agar media supplemented with human or sheep erythrocytes. This inhibition takes place even when the ef...

Strains of oral streptococci maintain an intracellular pH (pHi) that is more alkaline than the external pH (pHo). The delta pH (pHi-pHo) was about 0.6 in neutral media and about 0.9 in media of pH 5.5. Addition of 10 micrograms of F- per ml at pH 7.0 reduced the delta pH in Streptococcus salivarius to 0.17. The reduction of delta pH in S. sanguis H7PR3 was less pronounced, whereas the delta pH ...

Let F be a distribution in D′ and let f be a locally summable function. The composition F f x of F and f is said to exist and be equal to the distribution h x if the limit of the sequence {Fn f x } is equal to h x , where Fn x F x ∗ δn x for n 1, 2, . . . and {δn x } is a certain regular sequence converging to the Dirac delta function. It is proved that the neutrix composition δ rs−1 tanhx 1/r ...

We describe some new families of quasimodes for the Laplacian perturbed by the addition of a potential formally described by a Dirac delta function. As an application we find, under some additional hypotheses on the spectrum, subsequences of eigenfunctions of Šeba billiards that localise around a pair of unperturbed eigenfunctions.

The delta-function potential model and its application to the calculations of bond region as well as nonbond region electron contributions to the parallel component and bond perpendicular component are briefly surveyed. The L E W I S L A N G M U I R octet rule modified by LINNETT as a doublequartet of electrons is employed. The calculations of bond and molecular polarizabilities have been made ...

This paper is devoted to the study of delta shockwaves for a hyperbolic systemof conservation laws of Keyfitz-Kranzer typewith two linearly degenerate characteristics.TheRiemannproblem is solved constructively.TheRiemann solutions include exactly two kinds. One consists of two (or just one) contact discontinuities, while the other contains a delta shock wave. Under suitable generalized Rankine-...