The nonhuman primate (NHP) model is often the best experimental model for testing interventions designed to block infection by human pathogens, such as HIV, tuberculosis, and malaria. A physiological model may require the use of a limiting dose of the infectious agent, where only a fraction of animals become infected upon any given challenge. Determining the challenge dose of the pathogen in su...

This paper reports on an investigation using occlusion calculi to interpret digital images. Using a minimal set of digital, region-relation detectors, and assuming a continuous interpretation of physical space, we show how existing calculi can be augmented and embedded in the Event Calculus to interpolate and recover a larger set of occlusion relations than are otherwise available at the basic ...

Background: Infertility, defined by the failure to achieve a clinical pregnancy after twelve months or more of regular unprotected sexual intercourse. infertility is an important health problem in the society .tubal pathology is one of the main causes of infertility.it is estimated to account for 12-33%.hysterosalpingography is a method used for screening purposes in the routine infertility eva...

In this paper I address the general perception that agricultural activities are the principal threat to primate biodiversity in the tropics and argue that in Neotropical landscapes some agricultural practices may favor primate population persistence, and that this situation merits attention and investigation. To explore these issues, I examined three interrelated pressures upon tropical forests...