We analysed the effects of two different modes of host resistance on the evolution of parasite virulence. Hosts can either adopt an all-or-nothing qualitative response (i.e. resistant hosts cannot be infected) or a quantitative form of resistance (i.e. which reduces the within-host growth rate of the parasite). We show that the mode of host resistance greatly affects the evolutionary outcome. S...

bilateral finger and palm prints of 500 males and 500 females of the caucasian origin in south iran have been collected and analyzed for both qualitative and quantitative dermatoglyhic features. results show that most of the qualitative features on bilateral and bisexual differences are not significant. however, quantitative features frequently showed significant differences both bilaterally an...

Over approximately the last 20 years, the use of qualitative methods in educational research has evolved from being scoffed at to being viewed as useful for provisional exploration, to being accepted as a valuable alternative approach in its own right, to being embraced as capable of thoroughgoing integration with quantitative methods. Progress has been halting, and it is not surprising that ce...

qualitative and quantitative research methods are different in some aspects but they complement each other in other aspects, as well. following widespread criticism of qualitative and quantitative research methods, there is increasing trend in using mixed research methods in social sciences in general and political science in particular. most advocates of pluralism attempted to fill the gap bet...

abstract today, greenhouses are used for controlling different climacterics parameters, specially light and temperatures on agricultural productions. the most part of productions is vegetables production in traditional greenhouses (tg) and unfortunately productions quality and quantity in greenhouses is lower than modern (mg) ones. this experiment studies the effects of different climates of tw...