We use numerical simulations to investigate excitation of topographic vorticity waves (TVWs) along the Antarctic continental slope by outflows of dense shelf water through troughs. Idealized models show that wave frequency depends on the amount of stretching in the ambient fluid over the outflow and on background along-slope mean flow. Frequency is higher for steeper bottom slope, larger outflo...

We study here slopes of periodicity of tilings. A tiling is of slope θ if it is periodic along direction θ but has no other direction of periodicity. We characterize in this paper the set of slopes we can achieve with tilings, and prove they coincide with recursively enumerable sets of rationals.

The influence of the in-plane displacement and double-aperture orientation on the slope fringe formation in double-shearing-aperture speckle interferometry is discussed in detail. The research results show that the two in-plane displacement components, one parallel to and the other perpendicular to the shearing direction, have an influence on the slope fringe formation and that the double-apert...

28 29 Colonies of Pheidole ambigua ants excavate soil and drop it outside the nest entrance. 30 The deposition of thousands of loads leads to the formation of regular ring-shaped piles. 31 How is this pattern generated? This study investigated soil pile formation on level and 32 sloping surfaces, both empirically and using an agent-based model. We found that ants 33 drop soil preferentially in ...

Considering the limitations related to the landslide monitoring by Interferometric Synthetic Aperture Radar (InSAR) technique, the method of integration of Globe Positioning System (GPS) with Corner Reflector Interferometric SAR (CR-InSAR) techniques is proposed in this paper. Firstly, deformation in radar line-of-slight (LOS) direction is optimized by introducing the GPS-measured height and at...

in recent decades, the city development and city settlement have been tremendous. this has caused unequal physical and spatial expansion. the 21st century is the century of the city and living in city and almost half of the world population live as citizen. a glance at forecasting the data and statistics in 1400 shows an estimation of 130 millions of population and the calculation of present ci...

The intersection lines between discontinuity surfaces and their intersection points on the visible surfaces of any engineering structure may be the instability indicators. This paper describes a new approach to modelling the intersecting lines and points that would provide the first evaluation of any instability in an engineering structure characterized by the failure modes. In this work, the i...