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Syntactic foams are one of the most widely used close cell structured foams. They are used in applications for naval, aeronautical, aerospace, civil, industrial, and automotive engineering due to good acoustical attenuation, excellent strength to weight ratio, vibration isolation, and dielectric properties. These foams are fabricated by incorporation of hollow particles in a matrix material. The most...
We present a detailed positron 2D-ACAR measurements study of the "ridge" Fermi surface of (R)Ba_{2}Cu_{3}O_{7-δ} (R = Y, Dy) compared to full-potential linearized augmented plane wave and linear muffin-tin orbital calculations. From different 2D-ACAR projections measured in DyBa_{2}Cu_{3}O_{7-δ}, a 3D model of the momentum density of the ridge was established and is in good agreement with...
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