In this paper, a coupling methodology is involved and improved to correct the tool path deviations induced by the compliance of industrial robots during an incremental sheet forming task. For that purpose, a robust and systematic method is rst proposed to derive the elastic model of their structure and an ef cient FE simulation of the process is then used to predict accurately the forming forces. Their values are then de ned as the inputs of the proposed elastic model to calculate the robot TCP pose errors induced by the elastic deformations. This avoid thus a rst step of measurement of the forces required to form a test part with a stiff machine. An intensive experimental investigation is performed by forming a classical frustum cone and a non-symetrical twisted pyramid. It validates the robustness of both the FE analysis and the proposed elastic modeling allowing the nal geometry of the formed parts to converge towards their nominal speci cations in a context of prototyping applications.
This paper investigates how a country's specific-factors endowment affects its long-run economic performance. We build an open-economy version of the twosector neoclassical growth model in which we introduce fixed industry-specific inputs in both activities. We show that differences in input shares between sectors can contribute to explain why nations that seem to have similar factor endowments can show very different income levels. In particular, under (productivity-adjusted) factor-price equalization, larger amounts of factors specific to the industry with a lower (larger) labor share lead the economy to enjoy larger (smaller) long-run income levels. The model can also account for overtaking episodes between countries along their development paths.JEL Classification: O41, F43.
We explore the dynamics of the Scottish National Party (SNP) support using the British Household Panel Survey (BHPS) during 1999-06. We study the relative importance of political sentiments and egocentric economic evaluations by disentangling the effects of state dependence and unobserved heterogeneity by gender. Egocentric economic evaluations constitute an important determinant of SNP support over the entire period, being this effect stronger among the male electorate. The results are consistent with the electors holding the incumbent Labour Party accountable for their personal financial situation, though financial security augments the nationalist propensity among partisan voters. Furthermore, retrospective economic evaluations form a significant determinant of incumbent Labour Party support in both the 1999-02 and 2003-06 intervening electoral cycles.
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