D I R E C T measurement of large-scale ocean currents with current meter arrays is difficult and costly on basin scales. Since large-scale currents are very nearly in geostrophic balance, their velocity can be calculated from the pressure gradient on an equigeopotential surface. The surface geostrophic current therefore can be calculated from the deviation of sea level from the equigeopotential...

The Austral ian-Antarct ic discordance zone (AAD) is an anomalously deep and rough segment of the Southeast Indian Ridge between 120 ° and 128°E. A large, negative (deeper than predicted) depth anomaly is centered on the discordance, and a geoid low is evident upon removal of a low-order geoid model and the geoid height-age relation. We investigate two models that may explain these anomalies: a...

The increased use of GNSS for technical constructions and infrastructure works makes necessary the calculation of local accurate geoid undulation’s models for the determination of accurate orthometric heights. Apart from the conventional methods, artificial neural networks (ANN) are also used for this purpose. Specially, back propagation artificial neural networks (BPANN) are widely applied for...

The Auvergne test on quasi-geoid estimation has been set up in co-operation with IGN and EGGP. IGN supplied the gravity, DTM and GPS/levelling data while EGGP contributed in assessing the test procedures. A first comparison between the computations performed by six different groups have been presented during the last Hotine-Marussi Symposium held in Rome (July 5-9, 2009). The results of this te...

Advanced satellite geodetic systems have contributed to improving knowledge on changes in global gravity fields recent years. These offer profound opportunities the determination of a high-precision, high-resolution gravimetric geoid models data deficient regions. However, due absence research competence some regions, these conventional datasets not been implemented update obsolete reference fr...

This article presents our current work on studying energy efficient locomotion on crawling snake-like robots. The aim of this work is to use existing biological inspired methods to demonstrate lateral undulation planar gaits for efficiently controlling high-speed motion as a function of the terrain surface. A multilink non-wheeled snake-like robot is being developed for experimentation and anal...

A hot spot refers to numerous crime incidents clustered in a limited space-time range. The near-repeat phenomenon suggests that every victimization might form a contagion-like pattern nearby in terms of both space and time. In this article, the near-repeat phenomenon is used to analyze the risk levels around hot spots. Utilizing a recent burglary dataset in N (a large city located in southeaste...

Abstract Geoid anomalies offer crucial information on the internal density structure of Earth, and thus, its constitution dynamic state. In order to interpret geoid undulations in terms depth, magnitude lateral extension lithosphere upper mantle, effects lower mantle need be removed from full (thus obtaining residual ’upper geoid’). However, how achieve this seemingly simple filtering exercise ...

The Indian Ocean Geoid Low (IOGL) appears as a prominent feature if the geoid is, usual, shown with respect to Earth's reference shape. However, it is relative hydrostatic equilibrium, i.e. including excess flattening, merely regional low on north-south trending belt of geoid. For mantle viscosity structure an increase 2–3 orders magnitude from asthenosphere lower mantle, which suitable explain...