aphis gossypii glover is one of the most important pests of greenhouse cucumber and pepper in the world and iran. in this research, life table and biology of a. gossypii were investigated on cucumber (cucumis sativus cv. super sultan) and pepper (capsicum annum cv. marqueza) in a growth chamber at 25±1°c and 60±5% rh and a photoperiod of 14 l: 10 d hour.the results showed thatdevelopmental time...

The widespread opinion that demography is lacking in theory is based in part on a particular view of the nature of scientific theory, generally known as logical empiricism [or positivism]. A newer school of philosophy of science, the model-based view, provides a different perspective on demography, one that enhances its status as a scientific discipline. From this perspective, much of formal de...

Archaeological demography investigates the structure and dynamics of past human populations using evidence from traces of human activities and remnants of material culture in the archaeological record. Research in this field is interdisciplinary, incorporating findings from anthropology, paleogenetics, and human ecology but with a remit that extends beyond the primarily biological focus of pale...

Abstract While population ageing is rising, the educational composition of elderly remains rather heterogeneous. This study assesses differences in future Asia and Europe, how Europe would change if its populations changed. A comparative measure (the Comparative Prospective Old-Age Threshold [CPOAT]) was used, which recalculates old-age thresholds after accounting for life expectancy, likelihoo...

The Nature of Demography by Hervé Le Bras, translated by Godfrey Rogers from the original French publication in 2005 (La démographie, Paris: Odille Jacob), is about change, as demonstrated by the title of the introduction: ‘the dynamics of change in demography’ (p. 1). On the one hand, measuring, modelling and understanding demographic changes at the individual and population level are regarded...

The population of the developed world is steadily ageing. In the European Union, approximately 22% of persons are over 60 years of age and this is projected to increase to more than 27% by the year 2020. This has major implications for health care resources and the productive workforce. Ageing is accompanied by a decline in the physiological reserve of all organ systems, compromising homeostasi...