Theoretical & Applied Science

1-8

Authors: T. Yuvaraja ; K. Ramya

Digital terrestrial television (DTV) covers an area with radius as large as 60 km. FCC and Ofcom suggests detection of DTV signal at signal strength of as low as -114 dBm and -120 dBm respectively. Thus, Detection of DTV signals in low signal-to-noise ratio (SNR) is vital. Continual pilot (CP) positions in all the DTV signals are fixed. Digital Video Broadcasting Terrestrial (DVB-T), a DTV standard, is followed by most of the countries of the world. In this paper we propose a correlation based CP detection which can detect DVB-T signal at low SNR. One CP carrier was generated at the receiver which was correlated with the received orthogonal frequency division multiplexing (OFDM) signal sequence. The correlation coefficient was then compared with a threshold correlation coefficient to identify the existence of the CP to detect the presence of DVB-T signal and thereby spectrum hole. It was found from the simulation study for additive white Gaussian noise (AWGN) channel that signal detection at low SNR is possible compared to time domain symbol cross-correlation (TDSC) method.

14-31

Authors: Adam Dacko ; Ali, Jabbar Dawood Al-Khafaji

The Wing of airplane considers the most important component between other components of airplane due to simple fact that the airplane has no ability to fly without wing and other elements depend on it. These importance’s of wing come from the aid of wing that it must supply airplane with sufficient lift force (L). So due to this important, modern design are achieved by using software to enhance the design and produce better results. The aim is to describe wing structure and components by using Patran 2011 by MSC Software Company and then analyze this structure by using Nastran 2011 by MSC Software Company to see the behave of this wing under strength and buckling test for different composite material and estimate the proper structure of wing and material which will provide minimum value of Equivalent stress and maximum value for buckling load factor. We will have a model of wing for small acrobatic airplane with high overloads acting on the wing (n = 12) and safety factor equal 1.5 to insure maximum safety design.

37-43

Authors: Elchan Bahadur oglu Ghuseynov ; Javanshir Firudin oglu Mammadov ; Alesker Alekper oglu Iskenderov ; Gulnara Yusif gizi Abbasova

Modern development of national economy status requires the new methods of application of information technologies and computer technique. In this connection, in the article the problem of development of the intellectual system on the effective growing tea plant with the use of computer technology is conciedered. The basic methods of realization of agrotechnical works, growing tea-plant and collection of tea folias are analysed. On the basis of certain defects on growing tea plantations, experience of application of computer technologies new architecture of the intellectual system of growing tea plant with realization of complex works is proffered.

47-55

Authors: Dorota Kozlowska ; Wojciech Ryszkowski ; Anna Browko

The publication aimed at recognizing and comparing the reasons and factors which foster undertaking aerobics classes among women in two age groups. A diagnostic survey and a questionnaire were used for this purpose. The survey was conducted among 48 women who do aerobics. The women were divided into two age groups. The analysis of the survey results showed that younger women were more motivated to do aerobics (8.99) in relation to women over 40 (8.17). The factors motivating women to do aerobics were less significant among younger women (9.14) than older women (9.21).

65-69

Authors: Denis Alexandrovich Chemezov

The article considers the character of the pairing contact surfaces of the two bushings, made of alloy steel and aluminum alloy, with the guaranteed tightness (N = 0.03 mm) when pressing-in details at cold condition. The highest stress of the material is observed on the inner surface of the bushing of alloy steel in the direction of the coordinate axis Z on the part action of the efforts of pressing-in. This increases the strength of adhesion of the surfaces of the bushings on that side. Presents a comprehensive picture of changes in the direction of the velocity of deformation of materials in the longitudinal and transverse cross sections are pressed bushings. The maximum value of kinetic/internal energy ratio for bushing made of alloy steel is 22 at the end of the time range of the process of pressing-in.

73-75

Authors: Parvin Orkhan Karimzade

Article deals with the one of the pages of the party's activity "Difai" - the murder of General Goloshapov. "Difai" is the first national party who managed to unite the various segments of the population and in the absence of statehood to stand up for their own people. General Goloshapov was also involved in the murder of hundreds of innocent Azerbaijans. Party "Difai' in a national court makes Goloshapov death sentence. It was not an act of terror; it was an attempt to protect own people.

80-85

Authors: Roman Yurievich Kostyuchenko

Equations are considerable part of Mathematics as science and curriculum at school. Solving of trigonometric equations is not always simple because of objective and subjective reasons. From our point of view, teaching process how to solve trigonometric equations must be organized step-by-step: practice of solving simple trigonometric equations, then solving trigonometric equations of certain kind, and finally, in connections with accumulated knowledge of trigonometric expressions, solving equations of different types. Suggested article shows necessity of such coherence, reviews examples of trigonometric equations, and summarizes solving methods.

89-91

Authors: Nikolai Vladimirovich Semenchenko ; Konstantin Olegovich Hryachkov

This report describes the method of process control deformation cladding based on power parameters. We created the nomogram for determining the maximum strength in the contact zone during deformation cladding of flat surfaces. We have developed agloritm of an automatic control system, which eliminate the influence of wear wire and stabilize the quality parameters of coating layer at high level.

100-103

Authors: Tatyana Aleksandrovna Zinovyeva

The mid-nineties of the twentieth century in the foreign humanities noted the rapid development of gender studies. Gender is formed by the society as the social model of men and women, which defines their role, the position in the society and in its institutions (education, family, economy, political structure, culture, and others.). That is why it is important to highlight gender features in human oral activity.

108-111

Authors: Muminjon Isohonovich Hujaev

In this article the stages of the formation of the national state and political and legal views of A. Validov are considered. Along with historical facts of life A. Validov the article describes the main ideas and political beliefs of the scientist.

115-118

Authors: Anna Vladimirovna Shutaleva ; Evgeniya Anatol'evna Putilova

In article such actual perspective for Russia of the XXI century as possibility of application of problem and dialogue strategy in modern educational space is analyzed. The special attention is paid to problems of influence of education on formation of the human person and indicators of efficiency of education. Competence-based approach allows to designate an adaptation context in a system «personality-society» which staticizes uniqueness of an inclusiveness of the personality in educational process.