Global Bathymetry and Topography at 15 Arc Sec: SRTM15+

RTM gravity forward-modeling using topography/bathymetry data to improve high-degree global geopotential models in the coastal zone

We apply the residual terrain modeling (RTM) technique for gravity forward-modeling to successfully improve high-resolution global gravity fields at short spatial scales in coastal zones. The RTM scheme is combined with the concept of rock-equivalent topography, allowing to use a single uniform constant mass-density in the RTM forward-modeling, both at land and sea. SRTM30_PLUS bathymetry is me...

Iran's Role In Energy Security At Regional And Global Levels

Multialphabet Arithmetic Coding at 16 MBytes/sec

We present the design and performance of a non-adaptive hardware system for data compression by arithmetic coding. The alphabet of the data source is the full 256-symbol ASCII character set, plus a non-ASCII end-ofle symbol. The key ideas of our system are the non-arithmetic representation of the current interval width, which yields improved coding e ciency in the interval-width update, and a r...

Generalized Arc Consistency for Global Cardinality Constraint

A global cardinality constraint (gcc) is speci ed in terms of a set of variables X = fx1; :::; xpg which take their values in a subset of V = fv1; :::; vdg. It constrains the number of times a value vi 2 V is assigned to a variable in X to be in an interval [li; ci]. Cardinality constraints have proved very useful in many real-life problems, such as scheduling, timetabling, or resource allocati...

The global topography of Mars and implications for surface evolution.

Elevations measured by the Mars Orbiter Laser Altimeter have yielded a high-accuracy global map of the topography of Mars. Dominant features include the low northern hemisphere, the Tharsis province, and the Hellas impact basin. The northern hemisphere depression is primarily a long-wavelength effect that has been shaped by an internal mechanism. The topography of Tharsis consists of two broad ...