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We present a numerical technique for solving evolution equations, such as the wave equation, in the description of rotating astrophysical compact objects in comoving coordinates, which avoids the problems associated with the light cylinder. The technique implements a fast spectral matching between two domains in relative rotation: an inner spherical domain, comoving with the sources and lying strictly inside the light cylinder, and an outer inertial spherical shell. Even though the emphasis is placed on spectral techniques, the matching is independent of the specific manner in which equations are solved inside each domain, and can be adapted to different schemes. We illustrate the strategy with some simple but representative examples.

The issues of medical and labor expertise of cervical hip fractures are insufficiently covered in the literature. We analyzed the materials of the traumatological VTEK of the Tatar Autonomous Soviet Socialist Republic, where for five years (1973-1977) 91 patients with femoral neck fractures were examined for the first time (which amounted to 14.2% of all patients with femoral fractures). The average age of patients with hip fractures was significantly higher than the age of patients with other injuries, in particular with diaphyseal hip fractures (48.1 and 36.5 years, respectively). Nevertheless, the idea of ​​a hip fracture as a sad lot of the elderly is not entirely true: 58% of those surveyed were under 50 years of age. The vast majority of patients (up to 80%) underwent surgical treatment, which reflects the current active surgical tactics in this pathology. Basically, only patients with impacted valgus fractures (10 people) were not operated on.