in order to investigate deformation history preserved in the calcite twins in the hinterland of zagros, several samples have been collected from calcschists of the paleozoic sargaz complex in the faryab area, se iran. these samples are related to f1-recumbent folding and thrust shear zones. the twin width is about 1 and 3.8 µm (thin-twin regime); the twin strain amounts 5 and 10%; twin intensit...

In systems with a spontaneously broken continuous symmetry, the perturbative loop expansion is plagued by infrared divergences due to the coupling between transverse and longitudinal fluctuations. As a result, the longitudinal susceptibility diverges and the self-energy becomes singular at low energy. We study the crossover from the high-energy Gaussian regime, where perturbation theory remains...

We examine the shapes and energies of 5and 7-fold disclinations in low-temperature hexatic membranes. These defects buckle at different values of the ratio of the bending rigidity, κ, to the hexatic stiffness constant, KA, suggesting two distinct Kosterlitz-Thouless defect proliferation temperatures. Seven-fold disclinations are studied in detail numerically for arbitrary κ/KA. We argue that th...

I n uitro studies of actin filaments sliding on a myosin-coated surface are analyzed, filament by filament, at a sampling rate of 30 per second. For each filament, the mean arc length coordinate is computed and histograms of instantaneous velocities, along the arc length, are established. Two types of motion are observed, depending on the experimental conditions. The first one is characterized ...

Mahua (Madhuca indica syn. Bassia latifolia) fl owers, occupy an important position in the life of the tribal in many parts of India. Particularly, the fl owers of the plant are sugar rich and in certain cases it is the only source of livelihood for those people. However, its nutrient quality deteriorates during the postharvest storage and thus, poses a serious problem of adequate storage. In o...

A phenomenological description of the high-T c superconductors based on the Cooperon propagator is presented. This model allows one to study the effects of local pairing correlations and long-range phase fluctuations on the same footing, both above and below T c. Based on numerical calculations, it is shown that the two types of correlations contribute to the gap/pseudogap in the single-particl...