In an effort to understand the low temperature behavior of recently synthesized molecular magnets we present numerical evidence for the existence of a rotational band in systems of quantum spins interacting with nearest-neighbor antiferromagnetic Heisenberg exchange. While this result has previously been noted for ring arrays with an even number of spin sites, we find that it also applies for r...

Wireless capsule endoscope achieved great success, however, the maneuvering of wireless capsule endoscope is challenging at present. A magnetic driving instrument, including two bar magnets, a stepper motor, a motor driver, a motor controller, and a power supplier, was developed to generate rotational magnetic fields. Permanent magnet ring, magnetized as S and N poles radially and mounted spira...

INTRODUCTION Glenohumeral instability with glenoid bone loss is commonly treated with the Latarjet procedure. The procedure involves transfer of the coracoid and conjoint tendon, which is thought to provide a stabilizing sling effect; however, its significance is unknown. This study evaluated the effects of the Latarjet procedure, with and without conjoint tendon loading, on shoulder stability ...

In order to explore the deformation law of nanoindentation dislocation on different crystal planes 6H-SiC by cube indenter at high temperature, (0001), (11¯00) and (21¯1¯0) were simulated molecular dynamics, changes shear stress under analyzed. With deepening indentation depth, formation dislocations surfaces has a certain repeatability. The plane (0001) continuously generates horizontal around...

The noise and vibration of a ring-plate pincycloid gear reducer driven by two motors are measured respectively at different rotational speeds and different loads. The data are collected and analyzed using the HEAD acoustics multi-channel noise test and analysis system. The ArtemiS is a set of analysis system for improving product quality in all areas of sound and vibration. From the frequency s...

We demonstrate the self-assembled formation of concentric quantum double rings with high uniformity and excellent rotational symmetry using the droplet epitaxy technique. Varying the growth process conditions can control each ring's size. Photoluminescence spectra emitted from an individual quantum ring complex show peculiar quantized levels that are specified by the carriers' orbital trajector...

The title compound, C20H10Cl2N2, has crystallographic twofold rotational symmetry [maximum deviation from the least-squares plane = 0.038 (1) Å]. In the crystal, weak π-π ring stacking inter-actions occur down the a-axis direction [minimum centroid-centroid separation = 3.7163 (8) Å].

The whole mol-ecule of the title compound, C26H16N2S4, is generated by twofold rotational symmetry. The carbazole skeleton is nearly planar [maximum deviation = 0.054 (5) Å]. In the crystal, aromatic π-π stacking is observed between parallel carbazole ring systems of adjacent mol-ecules, the shortest centroid-centroid distances between pyrrole and benzene rings being 3.948 (3) and 3.751 (3) Å.

In the title compound, C21H20ClNO6, the furan moiety is located above the mean plane of the indole ring and displays rotational disorder (i.e. rotation through 180°); the site occupancy of the major component is 0.809 (6). In the crystal, C-H⋯O inter-actions link the mol-ecules into chains which run parallel to the b axis.