Spatial and Temporal Distribution of Modified Radio Refractivity Gradient at 875 hPa and 700 hPa over Nigeria

Temporal and spatial distribution of extreme precipitation indices over the lake Urmia Basin, Iran

Comparison of 700-hPa NCEP-R1 and AMIP-R2 Wind Patterns over the Continental United States Using Cluster Analysis

Clustering techniques are adapted to facilitate the comparison of gridded 700-hPa wind flow patterns spanning the continental United States. A recent decade (1985–94) of wind component data has been extracted from two widely used reanalysis datasets: NCEP-R1 and the NCEP–Department of Energy (DOE) Atmospheric Model Intercomparison Project, phase two (AMIP-R2). Metrics and measures are identifie...

HPA* Enhancements

In video games, pathfinding must be done quickly and accurately. Not much computational time is allowed for pathfinding, but realistic looking paths are required. One approach to pathfinding which attempts to satisfy both of these constraints is to perform pathfinding on abstractions of the map. Botea et al.’s Hierarchical Pathfinding A* (HPA*) does this by dividing the map into square sectors ...

Stress and the HPA Axis

Stress has long been suggested to be an important correlate of uncontrolled drinking and relapse. An important hormonal response system to stress-the hypothalamic-pituitary-adrenal (HPA) axis-may be involved in this process, particularly stress hormones known as glucocorticoids and primarily cortisol. The actions of this hormone system normally are tightly regulated to ensure that the body can ...

Modeling of HPA and HPA linearization through a predistorter: Global Broadcasting Service applications

This paper presents a technique to linearize the High Power Amplifier (HPA) through a Predistorter (PD). The characteristics of the PD circuit is derived based on the extension of Saleh’s model for HPA and a simple linear-log model. Numerical results will be shown for the Global Broadcasting Service (GBS) applications.