Irregular Pyramids are defined as a stack of successively reduced graphs. Each vertex of a reduced graph is associated to a set of vertices in the base level graph named its receptive field. If the initial graph is deduced from a planar sampling grid its reduced versions are planar and each receptive field is a region of the initial grid. Combinatorial Pyramids are defined as a stack of success...

Achieving the ambitious global HIV treatment goals will require a marked expansion of antiretroviral therapy (ART) coverage and close attention to HIV service quality [1]. In response, a growing body of evidence supports the use of differentiated ART services (DARTS) for subgroups of HIV-positive individuals [2–14]. Although differentiated services can support diverse patient groups, most curre...

Darts is enjoyed both as a pub game and as a professional competitive activity. Yet most players aim for the highest scoring region of the board, regardless of their skill level. By modeling a dart throw as a 2-dimensional Gaussian random variable, we show that this is not always the optimal strategy. We develop a method, using the EM algorithm, for a player to obtain a personalized heatmap, wh...

In a review of 46 meta-analyses of gender differences, overhand throwing had the largest gender difference favoring boys (ES > 3.0). Expectations for gender-specific performances may be less pronounced in female Australian Aborigines, because historical accounts state they threw for defense and hunting. Overhand throwing velocities and kinematics were recorded in 30 female and male Aboriginal A...

The author examines the problem of scoring a game of darts by use of image processing techniques. Dart enthusiast today are forced to choose between playing on regulation equipment and manually keeping score, or to use inferior, nonregulation, electronic dartboards. This paper presents a novel method of using images gathered from a stationary camera to automatically segment the board into each ...