Faceting of a growing crystal surface by surface diffusion.

Consider faceting of a crystal surface caused by strongly anisotropic surface tension, driven by surface diffusion and accompanied by deposition (etching) due to fluxes normal to the surface. Nonlinear evolution equations describing the faceting of 1+1 and 2+1 crystal surfaces are studied analytically, by means of matched asymptotic expansions for small growth rates, and numerically otherwise. Stationary shapes and dynamics of faceted pyramidal structures are found as functions of the growth rate. In the 1+1 case it is shown that a solitary hill as well as periodic hill-and-valley solutions are unique, while solutions in the form of a solitary valley form a one-parameter family. It is found that with the increase of the growth rate, the faceting dynamics exhibits transitions from the power-law coarsening to the formation of pyramidal structures with a fixed average size and finally to spatiotemporally chaotic surfaces resembling the kinetic roughening.

[Surgical treatment of patients with chronic calculous pancreatitis]. / Khirurgicheskoe lechenie bol'nykh khronicheskim kal'kuleznym pankreatitom.

The article discusses experience in the examination of 109 patients with chronic calculous pancreatitis (CCP), 102 of them were treated by operation (a total of 130 operations were carried out). Calculous cholecystitis was a consequence of alcohol intake in 102 cases, and was due to other causes in 7 cases. In 71% of cases CCP was attended by the development of indirect signs of pancreatic hypertension and in 45.1% by pancreatic cysts. Operations for internal (h = 49) and external-internal (n = 27) drainage were most pathogenetically justified. The mortality after these operations was 2%. The total postoperative mortality was 6.9%, mortality in the late-term periods was 8.8%. Unfavourable late-term results were encountered in individuals who continued drinking alcohol as well as in inadequate drainage of the pancreatic duct system.

[Use of the laser in the combined treatment of suppurative diseases and complications]. / Primenenie lazera v kompleksnom lechenii gnoinykh zabolevanii i oslozhnenii.

The authors' experience with the complex treatment of 241 patients with different purulent diseases and complications shows that the application of laser improves results of the treatment and shortens the period of staying of the patients at the hospital.