Results: **15**

#### Sea **surface** temperature determination in the North Atlantic based on planktonic foraminifera with the help of diverse biometric methods

This article presents the results of the reconstruction of **surface** temperature above the northeast part of the Iceland basin (Northeast Atlantic) for the last 300,000 years with help of the M. S. Barash method, as well as the RAM, MAT and TFT methods on the basis of the planktonic foraminifera data. The M. S....

#### Variability of climatic characteristics оver the South-East Baltic coastal waters in the early XXI century

... of atmospheric pressure, wind direction and speed, and air temperature from the automatic hydrometeorological station located offshore, as well as the satellite data from the infrared and microwave (radar images) ranges to determine sea ice and sea **surface** temperature, respectively. The research also reveals characteristic features of long-term dynamics of hydrological conditions in the south-eastern part of the Baltic Sea for 2005—2019. The average annual atmospheric pressure is close to ...

#### Akivis derivation formulas and Laptev structure equations on the **surface** of an affine space

The smooth **surface** in affine space is considered. With the derivation formulas and equations of the structure of an affine space constructed three pairs Akivis-Laptev on the **surface**. It is shown that the **surface** of an affine space is a holonomic smooth manifold....

#### Climate change in the mountainous regions of the Republic of Tyva: The case of the Bay-Tayginsk district

The most considerable increase in the temperature of soil **surface** was observed in the cold period (1,5 °С, a 53,9% rise in temperature), the smallest in August (0,3 °С, 2,1 %), whereas, in May-June, the increase was negative (–1,3 °С, 27,1 %). Major increases in air temperature take place in April-July,...

#### The research of **surface** features of the film CdS, fabricated by hydrochemical deposition on textured silicon substate

Investigated by atomic force microscopy and Auger electron spectrometry the **surface** of films CdS, formed by hydrochemical deposition on textured silicon substrate. It is shown that the film CdS thus manufactured characterized inhomogeneous distribution of size structural elements and chemical composition over the **surface**. These ...

#### Parameterization of some **surfaces** with the help of functions of a complex variable

Parameterizations of some **surfaces** using functions of a complex variable are considered, while obtaining different coordinate grids. The possibility of modeling bodies by setting the General projection area is described.
Kochina A. S.
complex function, conformal maps, ...

#### Chlorophyll «a» concentration in the South-Eastern Baltic Sea in summer 2018 (on satellite data)

... sea in summer 2018. The data of the MODIS radiometer installed on Aqua and Terra satellites were used for the analysis. The average concentration of chlorophyll "a" in the warm period of 2018 (May-August) was 3.8 mg/m3 while the average sea **surface** temperature was 17.7° С. The Maximum concentration of chlorophyll "a" (8.1 mg/m3) was recorded in May. However, the most massive development of phytoplankton occurred in July — the average monthly concentration of chlorophyll ...

#### The first Stokes method in the problem of waves on a liquid **surface** of finite depth

An approximate solution of the problem of the structure and characteristics of a stationary nonlinear periodic wave on the **surface** of a liquid of finite depth has been obtained. The solution is as follows: first, the kinematic and dynamic conditions are simplified. The Bernoulli integral contributes to the simplification of the dynamic condition. An integral operator of convolution ...

#### Calculation method of the channel potential possibilities of **surface** vessel radiocommunication system in the mode of pseudo-random frequency tuning

The article is devoted to the definition of methodological approaches to the development of multi-channel duplex radio communication systems that ensure reliable operation on a **surface** vessel. The research provides analytical expressions for the calculation of the possible number of transmit-receive channels in the model, depending on the signal spectrum width in the channel. The proposed software allows you to quickly calculate ...

#### New possibilities of passive microseismic monitoring applying for structural-tectonic features detection of oil and gas fields

There is described multifunctional **surface** small aperture aerial technology of microseismic monitoring. This technology is used for monitoring of hydraulic fractioning, fluid injection and for other well interventions. In addition it allows to describe crosshole block discontinues structures ...

#### On a 3D visualization of a solution to the problem of top movement along a smooth horizontal **surface**

This article considers the problem of 3D visualization of two examples of top movement along a smooth **surface**. The authors analyze the cases where analytical solutions are possible. Graphical illustrations to these solutions are provided.
1. Голубева О. В. Теоретическая механика. М., 1961.
2. Суслов Г. К. Теоретическая ...

#### Body elastic impact about oblique **surface**

The restoration factor is experimentally defined at blow of ball about a motionless oblique **surface**. It is shown that the restoration factor is function of an angle of slope.
1. Великанов Н. Л., Наумов В. А., Примак Л. В. и др. Совершенствование предпроектных расчетов по ...

#### Application of the gravimetric method in the study of paleoincisions on the territory of the Kaliningrad region

This paper summarizes the results of gravity surveys conducted across two palaeoincisions cut into the sub-Quaternary **surface** in the coastal area of the Kaliningrad region near Svetlogorsk. Strong local negative anomalies caused by the palaeoincisions are observed on the gravity anomaly profiles. The analysis of the palaeoincision's spatial distribution by using gravity ...

#### A research on the influence of the B-spline order on the **surface** appearance

This article considers the effect of the order of B-splines on the appearance of **surface** and smoothness degree. The **surfaces** based on B-splines of 2 x 2, 3 x 3, and 5 x 5 orders are presented.
Кochinа A., Slobodyanyuk M
B-splines, programming, modeling, smooth **surfaces**, computer graphics.
124-126

#### The applying of digital interferometric methods to nano-displacement registration

The estimation of limiting sensitivity of digital holographic methods of measurements of a **surface** of movings is lead}. Influence of a degree of digitization of hardware on limiting the sensitivity of digital holographic measurements is analysed. Parameters of **surface** — acoustic waves with amplitudes of fluctuations less than 10 nanometers ...