Dynamical assimilation of surface elevation from tide gauges is investigated to estimate the bottom drag coefficient and surface stress as a first step in improving modeled tidal and wind-driven circulation in the Chesapeake Bay. A two-dimensional shallow water model and an adjoint variational method with a limited memory quasi-Newton optimization algorithm are used to achieve this goal. Assimi...

Large gradients, when calculated by a first-difference method, have been detected in the 9 arc-second National Digital Elevation Model (DEM) of Australia released by the Australian Surveying and Land Information Group. Gradient values implied by the mean elevations in the DEM between adjacent grid cells of up to 74° have been observed, most notably in Australia’s more mountainous regions in the...

The use of airborne video data is gaining increasingly attention in the photogrammetric community. This interest is driven by the availability of low-cost sensor platforms like UAV and low-cost sensors such as digital (video) consumer cameras. Moreover, a wide range of applications are related to this kind of sensor data, e.g. fast mapping in case of disasters, where geometric and semantic info...

Although current practice guidelines provide an evidence-based approach to the management of acute coronary syndromes, application of the evidence by individual physicians has been suboptimal. This gap between comprehensive guidelines and actual practice stimulated Oman Heart Association to issue a simplified series for the management of the common cardiac abnormalities to be applied by the ent...

Variation in the computation of slope from digital elevation data can result in significantly different slope values and can, in turn, lead to widely varying estimates of environmental phenomena such as soil erosion that are highly dependent on slope. Ten methods of computing slope from distributed elevation data, utilizing capabilities inherent in five different geographic information systems ...

Extending from the previous semantic privacy-preserving model, we propose a widescale super-peer data integration and protection architecture. Any user from a superpeer domain can contribute new data, schema, or even mappings for other super-peer domains to integrate the information. Each super-peer domain is essentially a mediatorbased data integration system, where an agent at the super-peer ...

Photon-counting light detection and ranging (LiDAR) Ice, Cloud, Land Elevation Satellite-2 (ICESat-2) enables the drafting of global elevation maps. However, vegetation cover, terrain undulation, residual noise in signal photons substantially reduce accuracy ground photon extraction. Existing extraction algorithms do not consider factors influencing extraction, threshold setting lacks a theoret...

Super-enhancers are large clusters of transcriptional enhancers that drive expression of genes that define cell identity. Improved understanding of the roles that super-enhancers play in biology would be afforded by knowing the constellation of factors that constitute these domains and by identifying super-enhancers across the spectrum of human cell types. We describe here the population of tra...

We consider model based estimates for set-up time. The general setting we are interested in is the following: given a disk and a sequence of read/write requests to certain locations, we would like to know the total time of transitions (set-up time) when these requests are served in an orderly fashion. The problem becomes nontrivial when we have, as is typically the case, only the counts of requ...