No 4 (2015)

By the end of the 15 century the laying of the base of science was almost complete: the foundation of astronomy and biology, geography and mathematics, medicine and mechanics, physics and chemistry were laid. The wheel and the lever, concrete and curvilinear forms were invented. Optics laws were open, the methodology of knowledge is formulated and the equipment of experiment is developed. Transition to a position numeral system on the basis of the Arab figures and on system of mathematical symbols was carried out. The science foundation about Earth, conservation and metallurgy was laid. The constructed base allowed to begin construction of the building of this or that science. On the basis of known encyclopedic data the most significant achievements from history of devel- opment of science are given, beginning from the most ancient times to 15 century AD inclusive. Attempt to find out influence of spirituality on the birth and development of new ideas, opening and inventions at a stage of a laying of the base of science becomes.

The problem of estimating of the energy loss under the alternating force deforming of re- inforced concrete is formulated and solved and the beginnings of a method of energy op- timization of reinforced concrete structures are described

In the paper, the questions of analysis of the teethes of oblique angle spur gears are con- sidered. Specify calculation of the contact tension on the working surface of the teethes of oblique angle spur gears are leaded. The analytical dependences for calculation are proposed

A short essay of pressure pipelines analysis on water hammer and pressure oscillations by exact methods is described in this paper

The work is devoted the modeling of oscillations of bridge construction taking into ac- count the forces of damping and rigidity. The boundary integral equation (BIE) in velocities of a multizonal body (gas + construction) is supplemented BIE oscillations of an elastic body (construction) that allows to find the increase of amplitude of their oscillations

The paper presents the researching processes of hollow profile setting-pressing of a composite material based on "iron-copper" metallic powders and the improving of the quality by increas- ing the homogeneity of properties.

The present work has for objective the survey of the features of the rainfall observed on the Oueme's basin and the establishment of the Intensity-Duration-Frequency curves (IDF) of the precipitations very used in the conception of the hydraulic works and Civil Engineering. The extreme annual daily rainfalls of 37 rainfall stations of Benin installed on the Oueme's basin have been analyzed on the period 1971- 2010. Then, they have been adjusted to an extreme value law selected among the laws of Jenkinson and Gumbel according to the Kolmogorov-Smirnov test. These tests permitted to regionalize the laws of adjustment in distinct two zones of application: the law of Jenkinson appears more adequate to the zone South while the law of Gumbel suits the North zone of Benin better; what makes notice the non consistency of the exclusive use of the law of Gumbel at the time of the studies of conception of hydraulic works on the whole territory. The evaluation of the quantiles relative of daily rain to the period's back 2, 5, 10, 20, 50 and 100 years revealed that the maximal heights of water of rare frequency are observed at the Cotonou-Airport station on the Coastline and the maximal heights of water weakest in Ina's region to the North of Benin. The determination of the influence zones, climatic exponents of every station and the quantiles of maxim daily rains permitted to define the heights of rain of short lengths to act as basis to the establishment of the curves local IDF by means of the models of Montana, Talbot and Keifer -Chu. In conclusion; the model of Talbot, having a stronger physical and probabilistic basis than the classic Montana formula used for the modeling of the IDF curves, is more adequate.