Synchronization of quasiperiodic oscillations in nearly Hamiltonian systems: The degenerate case.

Quasiperiodic perturbations of two-dimensional nearly Hamiltonian systems with a limit cycle are considered. The behavior of solutions in a small neighborhood of a degenerate resonance is studied. Special attention is paid to the synchronization problem. Bifurcations of quasiperiodic solutions that arise when the limit cycle passes through the neighborhood of a resonance phase curve are investigated. The study is based on an analysis of an autonomous pendulum-type system, which is obtained by the method of averaging and determines the dynamics in the resonance zone. Two possible topological structures of the unperturbed averaged system are distinguished. For each case, the intervals of a control parameter that correspond to oscillatory synchronization are found. The results are applied to a Duffing-Van der Pol-type equation.

[Long-term results of combined treatment of patient with multiple primary cancers, including locally-advanced renal cell cancer, bladder cancer and transitional-cell cancer of the contralateral kidney].

A clinical case of the successful surgical treatment of patient with multiple primary cancers, including locally-advanced right renal cell cancer, transitional-cell cancer bladder cancer and metachronous transitional-cell cancer of the left kidney with one of the longest follow-up and survival time described in the literature.

[A variant of the modification of the rhinosurgical intervention with the use of the hemostatic glue]. / Variant modifikatsii rinokhirurgicheskogo vmeshatel'stva s primeneniem gemostaticheskogo kleia.

The objective of the present study was to evaluate the dynamics of the nasal breathing function and the quality of life in the patients following septoplastic surgery with the use of the classical method in comparison with the application of the latex tissue glue. The study included 58 patients presenting with diagnosis of deflected septum of the nose and vasomotor rhinitis. The following methods were employed for the purpose: anterior active rhinomanometry, evaluation of the transport function of the nasal cavity, and the questionnaire study for the determination of the patients' quality of life. The patients were allocated to two groups. Group 1 was comprised of the patients who underwent the classical surgical intervention (septal surgery with the mechanical disintegration of the inferior turbinated bones. The patients of the second group were treated with the use of the modified surgical procedure with the use of the latex tisue glue. The study has demonstrated that the patients treated with the use of the modified approach (including the application of the latex glue) recovered faster and reported a higher quality of life during the postoperative period than the patients of the first group treated by the conventional method.

[The efficacy of medical care following modified rhinosurgical interventions].

The objective of the present study was to evaluate the efficacy of medical aid after modified rhinosurgical interventions with the use of the methods for the objective assessment of the normalization of the nasal function and the patients' quality of life during the treatment. A total of 38 patients presenting with deviation of the nasal septum and persistent disturbances of the nasal breathing were examined and treated to estimate the quality of the medical aid following modified rhinosurgical interventions. The study has demonstrated the high quality of medical care for the patients undergoing modified rhinosurgical interventions which is the leading criterion for the treatment of the subjects suffering diseases of the nasal cavity.