Svetlana Amirova

The method to develop artificial ice for north seas

Rapidly vanishing polar ice may be supplemented with extensive artificial ice in order to alleviate effects of global warming. Here we consider methods for creating such artificial ice by introducing synthetic polymer rafts or films to the supercooled topmost water layer near ice sheet borders in northern Arctic seas. Such films will have three major effects. They will reflect incoming solar radiation, reducing ice melting, ocean absorption of solar energy, and net heating rates. The films will also provide additional sites for nucleation of ice crystals. Finally, by decreasing wave amplitudes in their immediate vicinity, polymer films will allow ice crystals to aggregate into larger ice structures.

Theoretical optimization of artificial ice for Arctic seas

The proposed method offers one possibility to restore climate in order to avoid overheating. The method to create a supplemental icy cover is considered in the paper. We investigate theoretically the creation of artificial rafts in the border of water-ice area in the north seas. Firstly, such artificial rafts or films can be used as additional mirror for san energy. Secondly, these rafts can decrease local water vibration for the ice to form easily in north regions. And finally, these rafts can be treated as crystallization centers in the supercooled water.

A method to increase the Arctic sea ice cover

Proposed in this paper is a new method for preserving the ice in the Arctic regions under the conditions of global warming. The main technique involves artificial polymer films, which are used as an additional cover for the overcooled northern regions. The polymer films are constructed in such a way that they cannot only reflect the incoming solar radiation but also provide additional sites for the nucleation of ice crystals. This feature of polymer films to produce ice crystal aggregation in the larger ice structures in the adjoining area can be achieved by decreasing sea wave amplitudes in the vicinity of the considered area.

Diffraction gratings to reduce tsunami waves

The main idea of proposed method is based on the novel possibility to create a precise point action of explosion series which produces the diffraction grating. In practice this process could be achieved by bombarding the ocean with explosive material in vicinity of tsunami region from the earth or from airplane. The tsunami velocity could be decreased and the wave front could be disturbed. In this paper the relevant calculations were performed for this overall process to be optimized.

Optical-mechanical method for measurements in microtechnologies

A convenient method for exact recognitions of the curved shape and amplitudes of vibrated micro cantilevers is presented. The method includes the analysis based on preliminary introduction of the formulas for the shapes of deviated cantilevers to get the intensity distribution R(ξ) of the optical pattern of image. The feature of this method is the possibility to get high accuracy for MEMS orientation.

Analysis of fiber-optic vibrated sensors with variable amplitude and frequency of acted excitation

An electromagnetic immune fiber-optic microvibrated sensor systems with cantilever-type sensing element are perspective for investigation of ground traffic monitoring, for earthquake forecasts, motor diagnostics, etc. An acceleration sensitivity of vibrated fiber tip will be analyzed and compared with another traditional approaches. The most of low-frequency accelerometers have been based on the seismic mass effect. But this different way of detecting of the movement of the seismic mass is by allowing it to produce of the micro stresses in the fiber body, which are detected by gratings spectrum immediately. This type sensor system was developed and realized in certain experiments to measure of the ground vibration excited by acoustic emission and mechanical interaction between the motor and the ground. But the whole potentials of high sensitivity of fiber-optic sensors with inner fiber gratings were not realized enough yet in experiments. (Abstract only available)

Fiber optic short-length sensors based on micromechanical vibrations: fiber grating's registration

Fiber-optic inner core gratings are considered together with the non-uniform Deformations is oscillated optical fiber. This is wide method of vibration registration as a result of appropriate deformations. Analysis was done for fiber cantilevers with the length 1-10 mm. Different cases were analyzed that correspond to transverse and longitudinal vibrations of the fiber tips or fragments with tow clamps. The pi-shifted Bragg-gratings are discussed to measure of vibrating amplitude in different real cases.