An ethanol vapor concentration of 1.6 mmol/l was used to test the diurnal variations of the olfactory response in two groups of snails, which were adapted to different light-dark cycles. The results revealed that the olfactory sensitivity to stimulation with ethanol was significantly increased during the day-time, which corresponds to the scotophase of the light-dark cycle, to which the animals...

In this paper we generalize the notion of helix in three-dimensional Euclidean space, which define as that curve $\alpha$ for there is an $F$-constant vector field $W$ along forms a constant angle with fixed direction $V$ (called axis helix). We find natural equation and geometric integration helices where orthogonal to its axis.

Despite the great development in manufacture of helical pile and their use, especially transmission towers wind turbines, there is little research on lateral behavior. In this laboratory study investigate behavior screw piles group (2×1) (1×2) with spacing to diameter helix ratio (S/Dh =1.5, 3, 4.5) having a (10 mm) embedded length (L/D = 40) by using single double soft clay extend stiff under ...

In this work, the notion of a slant helix is extended to the space E. First, we introduce the type-2 harmonic curvatures of a regular curve. Thereafter, by using this, we present some necessary and sufficient conditions for a curve to be a slant helix in Euclidean n-space. We also express some integral characterizations of such curves in terms of the curvature functions. Finally, we give some c...