Q:1; 2; 3 mantle structure as a reference frame for movements in and Q:4; 5; 6 on the Earth Q:7; 8 Trond H. Torsvik, Rob van der Voo, Pavel V. Doubrovine, Kevin Burke, Bernhard Steinberger, Lewis D. Ashwal, Reidar G. Trønnes, Susan J. Webb, and Abigail L. Bull Centre for Earth Evolution and Dynamics, University of Oslo, 0316 Oslo, Norway; Center for Advanced Study, 0271 Oslo, Norway; Geodynamic...

It is well known that the constraint satisfaction problem over general relational structures can be reduced in polynomial time to digraphs. We present a simple variant of such a reduction and use it to show that the algebraic dichotomy conjecture is equivalent to its restriction to digraphs and that the polynomial reduction can be made in logspace. We also show that our reduction preserves the ...

An experimental study is conducted on three ½ scales, single-story, single-bay, frame specimens. The first specimen was a reinforced concrete frame with solid-brick infill. The second specimen was a reinforced concrete frame with hollow clay perforated-brick infill. The last specimen was a reinforced concrete frame without any infill. These three specimens were tested by pseudostatic method. Di...

Standard knowledge representa t ion languages are se r i ous l y lack ing an e x p l i c i t formal semantic s p e c i f i c a t i o n . This may cause considerable t r oub le when appl ied to la rge amounts of r a p i d l y changing da ta . Based on an abs t rac t data type view of knowledge representa t ion languages a formal d e f i n i t i o n of a frame data model is presented in terms of ...

In the determination of suitable frame sizes associated with dynamic framed slotted Aloha used in radio frequency identification tag identification processes, the widely imposed constraint Q L 2 = often yields inappropriate values deviating far from the optimal values, while a straightforward use of the estimated optimal frame sizes causes frequent restarts of read procedures, both resulting in...

For n≥2 and 1<p<∞ we prove an L p -version of the generalized Korn-type inequality for incompatible, p-integrable tensor fields P:Ω→ℝ n×n having Curl ̲ vanishing tangential trace Pτ l =0 on ∂Ω, denoting by {τ } l=1,...,n-1 a moving tangent frame more precisely have:

We investigate shift invariant subspaces of $L^2(G)$, where $G$ is a locally compact abelian group. We show that every shift invariant space can be decomposed as an orthogonal sum of spaces each of which is generated by a single function whose shifts form a Parseval frame. For a second countable locally compact abelian group $G$ we prove a useful Hilbert space isomorphism, introduce range funct...

For a separated sequence Λ = {λk}k∈Z of real numbers there is a close link between the lower and upper densities D−(Λ), D(Λ) and the frame properties of the exponentials {ek}k∈Z: in fact, {ek}k∈Z is a frame for its closed linear span in L(−γ, γ) for any γ ∈]0, πD−(Λ)[∪]πD+(Λ),∞[. We consider a classical example presented already by Levinson [10] with D−(Λ) = D(Λ) = 1; in this case, the frame pr...

Numerical examples: We consider a TDMA system with a quaternary phase shift keying (QPSK) constellation and N,. = 4 receive antennas. Following a Rayleigh-fading assumption, the channel coefficients {h,Jl)} are generated as Gaussian random variables with zero mean and equal variance which are independent for different n, and/or 1; also, {hn,(l)} are fixed within one frame and changed independen...