This article proposes a new heuristic (locally determined) algorithm for the triangulation between point sequences representing cross-sectional contours of a surface. Such point sequence is required to be the set of vertices of a polygon representing a Jordan curve and approximating the contour. The algorithm which is applied directly to the whole point sequence, is very simple since it is base...

After the establishment of written language, the most revolutionary development in human communication was the invention of the printing press in the 15 th century (1). Before then, books were handwritten, rare, and expensive. Medieval monasteries supported the transcription of new manuscripts from existing ones, and errors were common because of spelling, handwriting, and abbreviation idiosync...

The public space in the Arab World has historically been controlled and seized by political authorities. This appropriation created a deep rift between citizens places. Nevertheless, since beginning of revolutions, new youth art forms have emerged liberating arts from traditional formalism these transferred to open spaces making them accessible people. research seeks explore street that during ...

We use Brownian motion ideas to study Schriidinger operators H = +A + V on Lp(R”). In particular: (a) We prove that limt+m t-l In /I e&H j111.9 is p-independent for a very large class of V’s where 11 A ll,,,n = norm of A as an operator from L’ to L”. (b) For Y > 3 and V E LY/~--E n L”Ip+c, we show that sup jl eetH Ilm,m -: (D if and only if H has no negative eigenvalues or zero energy resonance...

We analyze whether exposure to state violence affects substance use at the individual level. In doing so, we bring together political science and public health literatures on effects of violence, analyzing an outcome that is neglected in a type remains understudied health. leverage unique panel study, Population Council’s Survey Young People Egypt (SYPE), test rates are higher among those who w...