Development of the main directions on protection mountain and meadow peaty soils of basins of the rivers of the Northeast slope of Greater Caucasus

Mountain territories of the Azerbaijani part of Greater Caucasus differ increasing impact of different types of human activity on mountain meadow landscape complexes with their unpredictable consequences to which research works of many scientists are devoted. For this reason there is a need of implementation of the complex analysis of conditions of formation of mountain meadow peaty soils, their physical and chemical indicators and structure, opportunities of implementation of urgent nature protection actions

Alisher Navoiy siymosi tarixda

Ushbu maqolada Alisher Navoiy asarlarida vatanparvarlik tuyg’ulari ifodalanishining o‘ziga xos jihatlari, bobomizning ijodiy merosini chuqurroq o‘rganish va targ’ib etish, umumbashariy g’oyalarning mohiyatini ochib berish haqida fikr yuritilgan

Conditions for Optimality of Singular Controls in Dynamic Systems with Retarded Control

In this chapter, we consider an optimal control problem with retarded control and study a larger class of singular (in the classical sense) controls. For the optimality of singular controls, the various necessary conditions in the recurrent forms are obtained. These conditions contain also the analogs of Kelly, Koppa-Mayer, Gabasov, and equality-type conditions. While proving the main results, the Legendre polynomials are used as variations of control

Innovative methods for forming concepts of object size and measurement of sizes in preschool children

The article analyzes various approaches to the content and methods of forming ideas about the size of an object and measuring values ​​in preschool children, as well as technologies for forming the ability to use the correct names of specific lengths and correctly show them, when comparing 2 objects by weight (3 - 5 years) first (junior age) in situations of everyday life, in the process of communication and games, the words "heavy, light", "heavier, lighter" are introduced into the active vocabulary of children, methodical work on the formation of skills to arrange more than 2 objects according to size and weight (2 - 6 years) and provides recommendations for their implementation in practice

Inverse boundary value problem for an ekranoplan airfoil with blowing

An inverse boundary value problem of aerodynamics is formulated and solved for an ekranoplan airfoil with blowing through a slot. An airfoil moving with constant velocity along a flat ground surface is considered. The slot is modeled by an annular or straight duct with constant wall velocities. The densities and total pressures in the blown jet and external flow are different. Consequently, the flow velocity is discontinuous across the slip lines. An iterative solution process is developed, and examples of airfoils are constructed for various characteristics of both upper and under-the-wing surface blowing and for various heights. Conclusions are drawn about the effect of blowing parameters on the airfoil geometry and aerodynamics. Copyright © 2004 by MAIK "Nauka/Interperiodica"

The Formation of Mathematical Representations in Preschoolers in the Process of Familiarizing them with the Concepts of Quantities and Numbers

This article examines some of the methodological aspects of the formation of the concept of number and magnitude in preschoolers. Emphasizing that counting is a mathematical concept, this is an operation aimed at determining how many elements a given finite set contains, methodological features are given for the development of ideas about the natural series of numbers, a technique for the formation of the ability to group objects (2-6 years), the formation of ideas about the plurality and singularity of objects (from 3 to 5 years old), the formation of the ability to highlight 1 and many objects in the environment (from 3 to 4 years old), as well as the method of teaching counting (4-6 years old). based on a comparison of two groups of objects in terms of quantity

THE FORMATION OF MATHEMATICAL REPRESENTATIONS IN PRESCHOOLERS IN THE PROCESS OF FAMILIARIZING THEM WITH THE CONCEPTS OF QUANTITIES AND NUMBERS

This article examines some of the methodological aspects of the formation of the concept of number and magnitude in preschoolers. Emphasizing that counting is a mathematical concept, this is an operation aimed at determining how many elements a given finite set contains, methodological features are given for the development of ideas about the natural series of numbers, a technique for the formation of the ability to group objects (2-6 years), the formation of ideas about the plurality and singularity of objects (from 3 to 5 years old), the formation of the ability to highlight 1 and many objects in the environment (from 3 to 4 years old), as well as the method of teaching counting (4-6 years old). based on a comparison of two groups of objects in terms of quantity

Flow about a jet source with a deflector

We suggest a method to solve one of the model problems of aerohydrodynamics, namely, a problem of a flow about a point source, from which a fluid with density and total pressure, different from the corresponding values in the incoming flow enters. The calculations are carried out for various values of the determining parameter; and the data are compared with the known results. We revealed the advantages of the suggested method in comparison with the known ones. © Allerton Press, Inc., 2011

Existence and Uniqueness Theorems for Impulsive Fractional Differential Equations with the Two-Point and Integral Boundary Conditions

We study a boundary value problem for the system of nonlinear impulsive fractional differential equations of order α  0<α≤1 involving the two-point and integral boundary conditions. Some new results on existence and uniqueness of a solution are established by using fixed point theorems. Some illustrative examples are also presented. We extend previous results even in the integer case α=1