blades, pivoted so that the sharpened edges of each blade slide against each other when the handles opposite to the joint or pivot are closed. The cutting edge of each blade is where the inner surface and the cutting surface meet (Figure 1). The two cutting edges cut as they slide over each other. The angle of the cutting surface is usually between 0 and 15 degrees from the horizontal. Scissors...

Scissors modes were predicted in the framework of the two-rotor model. This model has an intrinsic harmonic spectrum, so that the level above the scissors mode, the first overtone, has excitation energy twice that of the scissors mode. Because the latter is of the order of 3 MeV in the rare-earth region, the energy of the overtone is below threshold for nucleon emission, and its width should re...

We recently suggested that the Scissors Mode (a collective excitation in which one system rotates with respect another one conserving its shape) can occur in crystals with axially symmetric atoms as a precession of these atoms around the anisotropy axis of their cells, giving rise to a form of dichroism. In the present paper we investigate how the Scissors Mode can be realized in crystals with ...

We investigate the segregation resulting from the competition between advection and shear-induced migration of suspensions in steady open flows. Herringbone channels form a concentration profile deviating from the particle focusing found in straight channels. Transients can result from a buckling instability during the onset of migration when particle-depleted fluid is injected into particle-ri...

P.P. Avelino, 2 D. Bazeia, L. Losano, 4, 3 J. Menezes, 4, 5 and B. F. Oliveira Centro de Astrof́ısica da Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal Departamento de F́ısica e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal Departamento de F́ısica, Universidade Federal da Paráıba 58051-970 João Pessoa, Paráıba, Brazil...

such that the smaller polyhedra have pairwise disjoint interiors. Note that there is not an additional assumption, say, that the smaller polyhedra meet face to face. Two polyhedra P and Q are scissors congruent if there are dissections P = P1 ∪ ...∪Pn and Q = Q1 ∪ ...∪Qn such that each Pk is isometric to Qk. Sometimes, one requires that all the isometries are orientation-preserving, but in fact...