[Mathematical model of the global carbon cycle in the biosphere].

Changes in the atmospheric carbon dioxide concentration, temperatures of the atmosphere, and parameters of land biota as a result of anthropogenic carbon dioxide emissions, forest clearance, and soil erosion are calculated in a spatial mathematical model of the global carbon cycle in the biosphere. Restrictions on the CO2 emissions to the atmosphere are deduced from the requirements of Kyoto Protocol to The UN Framework Convention on Climate Change and other scenarios. An ability is revealed for the atmospheric CO2 concentration to grow fast, which arises from a number of emerging and developing countries with large population and high CO2 emission rates and which surpasses greatly the effect of growth retardation due to Kyoto Protocol. Those countries' role will become mostly apparent to the year of 2060 and later. Russia has shown to be in an exclusive position relative to other countries: ecosystems of its territory absorb more of the atmospheric carbon dioxide than does any other country, and the inductrial emissions from its territory are practically equal to the absorption by ecosystems.

[Cardiovascular reactions in orthostatic tests and human resistence to vestibular stimuli]. / Serdechno-sosudistye reaktsii pri ortostaticheskikh probakh i rezistentnost' cheloveka k vestibuliarnym razdrazhiteliam.

The paper discusses the relationship between the vestibular stability of man and his cardiovascular regulation that develops during the recumbent-to-upright change of the body position. It describes specific parameters typical of the intermediate processes of the cardiovascular system that are prognostically important for the evaluation of the vestibular stability. The paper gives equations of multiple regression helping to predict the level of vestibular resistance with respect to the pattern of intermediate processes of the cardiovascular system during orthostatic tests.