Defining and refining sperm selection strategies

Defining and refining heart failure risk stratification to optimize patient selection for cardiac transplantation.

Issues in Defining, Analyzing, Refining, and Specifying System Dependability Requirements

Requirements specification has long been acknowledged as an area for further research in the development of systems, particularly for those that are computer based. In addition, an IEEE White Paper by Tripp and Keane indicates that current practice regarding System Dependability is in large part based on “tricks of the trade”, and that there is a need to codify “best practices”. This paper atte...

Refining Exoplanet Ephemerides and Transit Observing Strategies

Transiting planet discoveries have yielded a plethora of information regarding the internal structure and atmospheres of extra-solar planets. These discoveries have been restricted to the low-periastron distance regime due to the bias inherent in the geometric transit probability. Monitoring known radial velocity planets at predicted transit times is a proven method of detecting transits, and p...

Sperm competition: Defining the rules of engagement

Genetic and cell biological analyses of sperm behavior in the female reproductive tract are providing important clues to the mechanisms of sperm competition, a form of sexual selection that is an important force that shapes reproductive behavior, physiology and morphology in a wide range of species.

Sperm competition games: sperm selection by females.

We analyse a co-evolutionary sexual conflict game, in which males compete for fertilizations (sperm competition) and females operate sperm selection against unfavourable ejaculates (cryptic female choice). For simplicity, each female mates with two males per reproductive event, and the competing ejaculates are of two types, favourable (having high viability or success) or unfavourable (where pr...