Based on the geometric interpretation of the Dirac equation as an evolution equation on the three-dimensional exterior bundle Λ(R), we propose the bundle (T ⊗Λ⊗Λ)(R) as a geometric interpretation of all standard model fermions. The generalization to curved background requires an ADM decomposition M ∼= M × R and gives the bundle (T ⊗ Λ ⊗ Λ)(M). As a consequence of the geometric character of the ...

paleolithic lithic assemblages are traditionally described on the bases of presence of a variety of tool types(typology) and of different knapping technologies. in this study we tried to investigate whether the presence ofdifferent groups of scrapers in the mar-tarik site assigned to the middle paleolithic represent specific function orjust different stages of the reduction process and constant...

Let V be an n-dimensional vector space over Fq. By a geometric t-[q, k, λ] design we mean a collection D of k-dimensional subspaces of V , called blocks, such that every t-dimensional subspace T of V appears in exactly λ blocks in D. A large set, LS[N][t, k, q], of geometric designs, is a collection of N t-[q, k, λ] designs which partitions the collection [ V k ] of all k-dimensional subspaces ...

An implicit unsteady upwind solver including a mesh motion approach was applied to simulate a helicopter including body, main rotor and tail rotor in hover flight. The discretization was based on a second order finite volume approach with fluxes given by the Roeand#39;s scheme. Discretization of Geometric Conservation Laws (GCL) was devised in such a way that the three-dimensional flows on arbi...