2,187 research outputs found
Data mining techniques using decision tree model in materialised projection and selection view
With the availability of very large data storage today, redundant data
structures are no longer a big issue. However, an intelligent way of managing
materialised projection and selection views that can lead to fast access of
data is the central issue dealt with in this paper. A set of implementation
steps for the data warehouse administrators or decision makers to improve
the response time of queries is also defined. The study concludes that both
attributes and tuples, are important factors to be considered to improve the
response time of a query. The adoption of data mining techniques in the
physical design of data warehouses has been shown to be useful in practice
Dependence of Adhesion Property of Epoxidized Natural Rubber (ENR 25)/Ethylene-Propylene-Diene Rubber Blend Adhesives Crosslinked by Benzoyl Peroxide
The loop tack, peel strength, and shear strength of crosslinked epoxidized natural rubber (ENR 25)/ethylene-propylene-diene
rubber (EPDM) blend adhesives were investigated. Coumarone-indene resin, toluene, and benzoyl peroxide were used as the
tackifier, solvent, and crosslinking agent, respectively, throughout the experiment. The adhesive was coated on a polyethylene
terephthalate (PET) substrate using a SHEEN hand coater at 6
Decoherence of Einstein-Podolsky-Rosen steering
We consider two systems A and B that share Einstein-Podolsky-Rosen (EPR)
steering correlations and study how these correlations will decay, when each of
the systems are independently coupled to a reservoir. EPR steering is a
directional form of entanglement, and the measure of steering can change
depending on whether the system A is steered by B, or vice versa. First, we
examine the decay of the steering correlations of the two-mode squeezed state.
We find that if the system B is coupled to a reservoir, then the decoherence of
the steering of A by B is particularly marked, to the extent that there is a
sudden death of steering after a finite time. We find a different directional
effect, if the reservoirs are thermally excited. Second, we study the
decoherence of the steering of a Schr\"odinger cat state, modeled as the
entangled state of a spin and harmonic oscillator, when the macroscopic system
(the cat) is coupled to a reservoir
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