For over 2000 years the manual craft of papermaking has been practiced all over the world utilizing a variety of techniques. This review describes the evolution of hand papermaking and its cultural significance. Paper’s evolution has been shaped by the structure and chemical composition of the fibers. Almost every aspect of modern papermaking technology has been foreshadowed by traditional prac...

We relate properties of linear systems on X to the question of when I contains I(m) in the case that I is the homogeneous ideal of a finite set of distinct points p1, . . . , pn ∈ P , where X is the surface obtained by blowing up the points. We obtain complete answers for when I contains I(m) when the points pi lie on a smooth conic, or when the points are general and n ≤ 9.

In this paper I present new international comparisons of economic growth among the G7 nations—Canada, France, Germany, Italy, Japan, the U.K., and the U.S. (See the tables and charts pp. 154–166.) These comparisons focus on the impact of investment in information technology (IT) equipment and software over the period 1980–2000. In 1998 the G7 nations accounted for nearly sixty percent of world ...

Recently, many studies have shown that IT played a major role in the resurgence in the growth of US output and productivity after 1995. Some studies for European countries also confirm this idea that IT and productivity are strongly related. The contribution of IT to economic growth can only be realized when and if these technologies are widely diffused and used. Within this context, understand...

H status is inherently a multiattribute construct. We examine multiattribute utility decompositions for the quality-adjusted life year (QALY) utility model commonly employed in medical decision and costeffectiveness analyses. We consider several independence conditions on preference, including the classical notions of preferential independence and utility independence, as well as new related no...

We study the resurgent structure associated with a Hamilton Jacobi equation This equation is obtained as the inner equation when studying the separatrix splitting problem for a perturbed pendulum via complex matching We derive the Bridge equation which encompasses in nitely many resurgent relations satis ed by the formal solution and the other components of the formal integral

We study the Lp-spectrum of the Dirac operator on complete manifolds. One of the main questions in this context is whether this spectrum depends on p. As a rst example where p-independence fails we compute explicitly the Lp-spectrum for the hyperbolic space and its product with compact spaces.

We show that for n ≥ 3 there is an action of the braid group Bn on the determinantal ideals of a certain n × n symmetric matrix with algebraically independent entries off the diagonal and 2s on the diagonal. We show how this action gives rise to an action of Bn on certain compact subspaces of some Euclidean spaces of dimension n 2 . These subspaces are real semi-algebraic varieties and include ...