Article history: Received 10 October 2009 Available online 26 May 2010 In this article we investigate the relation between population and real wages in the Italian economy during the period 1320–1870. The main result is that the positive check is strong and statistically significant but the other equilibrating mechanism in the Malthusian model – the preventive check – based on the positive rela...

The productivity of present day industrial robots may be hampered by phenomena such as vibrations and deformations which appear whenever they are made to move at high speeds or to carry heavy payloads. To address this problem, many researchers have studied the flexibility of robot arms. Most works, however, rely on simple one or two-link flexible arms made with extremely flexible beams which op...

The microalgal community as primary producers has to play a significant role in the biotic and abitoic interactions of any aquatic ecosystem. Whenever a community is exposed to a pollutant, responses can occur because individuals acclimate to pollutant caused changes and selection can occur favouring resistant genotypes within a population and selection among species can result in changes in co...

This paper describes the methodology used for development of a static capacity model. It is a well-known fact that no matter how sophisticated the dynamic models are, there is always a need for the simple spreadsheet model. The spreadsheet model helps one carry out simple and fast analyses whenever they are needed. At the Seagate Technology’s Recording Head Operations Wafer Manufacturing facili...

What happens when we unexpectedly see an attractive potential partner? Previous studies in laboratory settings suggest that the visualization of and unattractive photographs influences perception time. The major aim this research is to study time attraction a realistic social scenario, by investigating if changes subjective measured during speed dating are associated with attraction. duration d...

Whenever industrial plants consume power and heat there is a need to consider energy efficiency investment on a cogeneration (CHP) plant. We investigate economic incentives influencing the adoption of energy saving technology by industry, namely, CHP in UK and Dutch manufacturing sectors. Our analysis is based on an empirical model by the application of cross sectional time series econometric m...