Let Mn be a closed, connected n-manifold. Let M−τ denote the Thom spectrum of its stable normal bundle. A well known theorem of Atiyah states that M−τ is homotopy equivalent to the Spanier-Whitehead dual of M with a disjoint basepoint, M+. This dual can be viewed as the function spectrum, F (M,S), where S is the sphere spectrum. F (M,S) has the structure of a commutative, symmetric ring spectru...

Consider a spectrum of N orthogonal channels licensed to a slotted primary network. Let Sn(t) ∈ {0 (busy), 1 (idle)} denote the occupancy of channel n in slot t. We assume that the spectrum occupancy S(t) ∆ = [S1(t), . . . , SN(t)] follows a discrete-time homogeneous Markov process with finite state space S ∆ = {0, 1} and known transition probabilities {Ps,s′}s,s′∈S, where Ps,s′ ∆ = Pr{S(t+ 1) ...

how to cite this article: mohammadi mr, salmanian m, akhondzadeh sh. autism spectrum disorders in iran. iranian journal of child neurology2011;5(4):1-9. objective autistic disorder, asperger syndrome, and pdd-not otherwise specified are subsets of autism spectrum disorders (asds), which are characterized by impairments in social communication and stereotyped behavior. this article reviews the p...

Objective(s): The purpose of this research is to study the effect of beta spectrum on absorbed fraction ( ) and to find suitable analytical functions for beta spectrum absorbed fractions in spherical and ellipsoidal volumes with a uniform distribution for several radionuclides that are commonly used in nuclear medicine.Methods: In order to obtain the beta particle absorbed fraction, Monte Carlo...

in this research, structural and electronic properties of zncdn-1ten clusters (n=1-10) have been studied by formalism of density functional theory and using the projector augmented wave within local density approximation. the structural properties (such as bond length/angle and coordination number), electronic and optical properties (such as binding energy, kohn-sham spectrum and partial charge...