Similarities and differences in the visual content, scale, and shape of environmental boundaries for two environments have been extensively examined for their impact on the recurrence of spatially specific hippocampal firing patterns across environments and across multiple regions of a single environment. Although the shapes of paths taken through an environment are known to impact hippocampal ...

Context. The spiral galaxy NGC 6946 hosts magnetic spiral arms, highly aligned magnetic fields between the gas/optical arms. Aims. The origin of the magnetic phenomena and their relation to the interstellar gas are investigated. Methods. NGC 6946 was observed in total intensity and linear polarization in five radio bands between 3 cm and 21 cm. Maps of spectral index, Faraday rotation and depol...

Helical bevel gears have inclined or twisted teeth on a conical surface and the common types are skew, spiral, zerol, hypoid gears. However, this study does not include Due to geometric complexities of gears, commonly used methods in their design based concept equivalent virtual spur gear. The approach paper is following assumptions, a) helix angle helical equal mean spiral angle, b) pitch diam...

Stabilization of an unstable system with an unknown actuator delay of substantial length is an important problem that has never been attempted. We present a Lyapunovbased adaptive control design, prove its stability and regulation properties for the plant and actuator states, and present a simulation example inspired by the problem of control of pitch and flight path rates in the unstable X-29 ...

In this paper, we present an iterative algorithm that computes the camera path of long image sequences. It consists in applying successive bundle adjustment phases on di erent segments of the image sequence. The local models thus obtained are merged together into a common reference frame. The procedure is then repeated on a new grouping of the cameras, until the reconstruction error has reached...

ABSTRACT Spirals in protoplanetary discs have been used to locate the potential planet discs. Since only spiral shape from a circularly orbiting perturber is known, most previous works assume that circular orbit. We develop simple semi-analytical method calculate of spirals launched by an eccentric planet. emits wavelets during its orbit, and wave fronts these propagating form spirals. The resu...

OBJECTIVE To compare the performance of superparamagnetic iron oxide (SPIO)-enhanced magnetic resonance (MR) maging at 1.5T and dual-phase spiral computed tomography (CT) for the depiction of small hypervascular hepatocellular carcinomas (HCCs). MATERIALS AND METHODS Forty-three patients with 70 small nodular HCCs (5-20 mm; mean, 13.7 mm) were examined. Diagnosis was based on the results of s...

Bubble columns are gas- liquid contactors that are widely used in chemical and bio- chemical industries. High mixing that result in high heat and mass transfer rates are amongst their advantages. Heat transfer in a bubble column having a bundle of heaters investigated and the variation of heat transfer coefficient with variation in heaters pitch to diameter ratios in a bundle of heaters reporte...