In the selective withdrawal experiment fluid is withdrawn through a tube with its tip suspended a distance S above an unperturbed two-fluid interface. At low withdrawal rates, Q, the interface forms a steady state hump and only the upper fluid is withdrawn. When Q is increased (or S decreased), the interface undergoes a transition so that the lower fluid is entrained with the upper one, forming...

We have discovered a new AM Her system as the optical counterpart of the ROSAT All-Sky-Survey source RX J1016.9–4103 (≡ 1RXS J101659.4-410332). The X-ray spectrum is very soft and the X-ray intensity is strongly modulated with the orbital period. Optical photometric and spectroscopic follow-up observations reveal a synchronously rotating binary with an orbital period of 134 min, placing RX J101...

The human brain is thought to elicit an object representation via co-activation of neural regions that encode various object features. The cortical regions and mechanisms involved in this process have never been elucidated for the semantic system. We used functional magnetic resonance imaging (fMRI) to evaluate regions activated during a task designed to elicit object activation within the sema...

We explore a method of representing solid shape that is useful for visual recognition. We assume that complex shapes are constructed from convex, compact shapes and that construction involves three operations: solid union (to form humps), solid subtraction (to leave dents), and smoothing (to remove discontinuities). The boundaries between shapes joined through these operations are contours of e...

Spot prices in energy markets exhibit special features like price spikes, mean-reversion inverse, stochastic volatility, inverse leverage effect and co-integration between the different commodities. In this paper a multivariate stochastic volatility model is introduced which captures these features. Second order structure and stationary issues of the model are analysed. Moreover the implied mul...

Ask a broad sample of thoughtful people what they expect the world to be like in 50 years; then plot the answers on a simple spectrum (as below) from “future misery” to “future luxury”. You are likely to find that the answers do not fall, as so many things do, in the “normal distribution” form that looks like a single symmetrical mountain. In a normal distribution, the largest number of respons...

Abstract Background The smooth and straight nasal dorsum is a goal after hump reduction as dorsal irregularities are unexpectable inevitable complications. aim of this study to evaluate modified perichondrial-periosteal flaps functionally aesthetically camouflage irregularities. A total 115 patients with humps were enrolled in the study. perichondrium over upper lateral cartilages divided midli...