Nowadays in Russia and abroad the majority of hand and electric drives are based on a screw gear [1]. Despite the results achieved in the area of technology of screw gears production by leading domestic and international manufacturers and successful design arrangement of drive, the low performance coefficient of screw gears, limited load capacity and significant starting torque make a particular negative impact on the reliability of the drive when operating in low temperature conditions, and also the high specific metal content of drive represent the reasons for required development of drives based on other gear mechanisms. During the last few years a number of new constructions of block valves’ drives were developed, among which the most promising ones are the drives based on the spiroid transmission [2], the harmonic drives with intermediate rolling elements [1] (TOMZEL, SibMash, Gusar) and eccentrically cyclo gear boxes (ZAO "Technology Market", Tomsk, Russia). In comparison with screw gear spiroid gear has a higher performance coefficient and higher load capacity and has better weight and dimensional characteristics, especially in case of steel gear wheels usage. At the same time, the relatively high sliding velocity of screw turn’s surface and wheel tooth surface in comparison with the similar relative velocities of gear and wheel teeth surfaces of cylindrical and pan gears leads to significant starting torques during the operation of manual drives of block valves in severe conditions of operation. The harmonic drives with intermediate rolling bodies and eccentrically cyclo gear boxes have high performance coefficient [1] and hence low torque strength during the multiple contacts of rolling bodies. At the same time, in addition to much more sophisticated technology of such gears production in comparison with traditional screw gears, the gear’s load capacity with intermediate rolling bodies under conditions of their significantly point contact even taking

The assessment is a complex action, integrated in the learning process that establishes and appreciates school performance, which reflects the objectives and tasks proposed and the efficiency of the teaching activity. The evaluation appears not as a superimposed activity of teaching, but as an integral part of the learning process. Assessment in physical education is an instrument through which the quality of physical education is measured and assessed. The research was conducted in an effort to optimize the educational process to increase efficiency and quality of gymnastics lessons by finding ways to increase the capacity of self- training and selfevaluation. We started from the idea that differentiated instruction designed to adapt the work, in terms of forms of organization and teaching methodologies to its own possibilities, while the ability to understand the interest in moving, working and learning pace is different.

This study aims to examine the causal relationship between economic growth and exports in Jordan using the Granger methodology in order to determine the direction of the relationship between the two variables during the period 2000- 2012. The study found that there is a causal relationship going from the economic growth to Export, and not vice versa. Based on the outcome of causality tests, the changes in the economic growth help explain the changes that occur in the Export.

In this paper, Örstly, timelike parallel surfaces and their some basic properties are presented in Minkowski 3-space. Then the main theo- rem for a timelike parallel ruled surface is given to show how parallel surfaces of a timelike ruled surface with a timelike ruling become again timelike ruled surface with a timelike ruling. Additionally, some basic properties of those kind ruled surfaces are given in Minkowski 3-space.

This paper examines the place of natural resources as a factor that generates conflict, insecurity and inhibits socio-economic and national development in the Gulf of Guinea. Three resource conflict approaches and resource regimes that generate conflict and insecurity in a community are identified and analyzed. It was indicated that natural resource-rich countries in the Gulf of Guinea have been the landscape of continuous instability in the form of internal turmoil, cross-border conflicts or both. While the conflicts have involved local regimes, opposition forces and rebel groups, they have been complicated by external influences driven by geopolitical and economic interests. To that extent, the grip and control of these resources is a strategic priority for both governments and armed groups who use these illicit revenues to finance their military operations thereby exacerbating the conflicts. The paper conclude by way of policy recommendation that, to overcome resource conflicts and insecurity and engender development, the sub-region must institute genuine public participation whereby the environment rather being a source of conflict and underdevelopment; would serve as a catalyst for peace and development. Without which resource governance and better management of the environment, human security and development will remain elusive in the Gulf of Guinea.

The present study represents a methodological research of environment factors and anthropic perturbation related with small rivers in the Vistula Mouth in Poland. The aim of this study is to assess the potential of environment services in one study area with a particular environment characterized by the small rivers. The methodology used is based on field expeditions and review of the literature. In this work it was analysed the concept of rebuild connections’ between small rivers and local society. In particular, this work, relates how to achieve an environment with better interaction with local society, it was performed an analysis of possibilities to carry out actions to maintain, preserve or rehabilitate the small rivers. The results of the study shows the importance of the small rivers, as reported in this paper make some recommendations for further interaction between small rivers and local society.

In this paper, we have considered a Pulsatile flow in an elastic arterial tube and witnessed the efforts on the flow due to elasticity of the tube. The expression for “Volumetric flow rate” and “impedance of nth harmonic” have been found. Conclusions have been drawn with the aid of graphs. MATLAB software has been used for sketching graphs.

Support vector machines have been used as a classification method in various domains including and not restricted to species distribution and land cover detection. Support vector machines offer many key advantages like its capacity to handle huge feature spaces and its flexibility in selecting a similarity function. In this paper the support vector machine classification method is applied to remote sensed data. Two different formats of remote sensed data is considered for the same. The first format is a comma separated value format wherein a classification model is developed to predict whether a specific bird species belongs to Darjeeling area or any other region. The second format used is raster format which contains image of Andhra Pradesh state in India. Support vector machine classification method is used herein to classify the raster image into categories. One category represents land and the other water wherein green color is used to represent land and light blue color is used to represent water. Later the classifier is evaluated using kappa statistics and accuracy parameters.

This study investigated the factors militating against the implementation of computer education in secondary schools in Ondo State South West, Nigeria. The study investigated availability of computer resources in the schools, the budgetary and funding of computer education in schools, availability of trained manpower in teaching computer education in schools, the attitude of the school community towards the teaching and learning of computers in schools, adequacy of time for computer lessons on the timetable and Remedies to ensure computer education is fully implemented in schools. The descriptive survey design was used for the study. The population consisted of all the teachers and principals of the secondary schools in Ondo State. The sample consists of 500 teachers and 50 principals randomly selected from 50 secondary schools in Ondo States. A selfdesigned questionnaire tagged “Computer Education for Secondary Schools (CESS)” was used to collect the data for the study. Data collected for the study were analysed using frequency counts, percentage scores and bars. The study revealed that computerresources were lacking in schools. Moreover, the study revealed that budgetary and funding constraints militating against computer education in schools; there is lack of trained manpower in teaching computer education in schools; the school community show positive attitude towards the teaching and learning of computers in schools; there is no adequacy of time for the computer lessons on the timetable. However, despite the above constraints, the study also revealed some remedies that can be put in place to make sure computer education is fully implemented in schools: school authority shouldsource for funds and computers from well-wishers: Government to provide funding to schools for computer procurement; Invigorating the training of manpower to teach computers in schools; Teacher education institutions to incorporate computer education into their curriculum; Government to

One of the major limitations of microstrip antenna is narrow bandwidth. Various techniques can be used to improve it’s BW. In this paper, Proximity coupling technique and X slot are employed to enhance the BW of Rectangular Microstrip antenna (RMSA). A RMSA with X slot has been designed at a frequency of 2.45GHz on FR4, one substrate and it is proximity coupled with microstrip feed, which is on the other substrate. Various parameters viz. Return loss, VSWR, input impedance, Gain, are obtained from HFSS simulation and Networkanalyzer test is performed to obtain VSWR. Percentage BW of VSWR from network analyzer is obtained as 7.14, which is more than that of a microstrip feed RMSA.