One of the main notions in category theory is the notion of limit. Similarly, one of the most commonly used techniques in homotopy theory is the notion of “homotopy limit” commonly called “holim” for short. The purpose of the this paper is to begin to develop the notion of limit for n-categories, which should be a bridge between the categorical notion of limit and the homotopical notion of holi...

in this paper the effects of non-linearity of suspension on dynamic behavior of a railway wheelset has been studied. this wheelset has four degrees of freedom that with two constraints it has reduced to two degrees of freedom. vermeulen-johnson theory has been used to calculate contact forces between wheel and rail. in this study the creep coefficients have considered constant. any linearizatio...

in this paper, penetration of high velocity impact of 4340 steel and tungsten carbide projectiles with specific shapes in to ceramic armor that includes 10 mm alumina (95%) is considered analytically and simulated with ls-dyna software. bernoulli equation used to consider the penetration velocity in ceramics, shows that the penetration is better and easier by increasing projectile density. the ...

We describe n-generated free MV -algebras as MV-algebras having the lattice reduct which is a direct limit in the category of distributive lattices.

L. A Souza, F. F. Bellotti, T. Frederico, M. T. Yamashita, and L. Tomio Instituto Tecnológico de Aeronáutica, DCTA, 12228-900, São José dos Campos, Brazil Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark Instituto de Fomento e Coordenação Industrial, 12228-901, São José dos Campos, SP, Brazil Instituto de F́ısica Teórica, UNESP Univ Estadual Paulista, C.P. 70532-...