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Concave Pyramids of Second Sort -The Occurrence, Types, Variations
(Faculty of Civil Engineering and Architecture ; Serbian Society for Geometry and Graphics SUGIG, Niš ; Beograd, 2014)
Correspondingly to the method of generating the Concave Cupolae of second sort, the Concave Pyramids of second sort have the similar logic of origination, and their counterpart in regular faced convex pyramids (tetrahedron, ...
On the extension of the Erdös-Mordell type inequalities
(Mathematical Inequalities & Applications, 2014)
We discuss the extension of inequality R_A >= c/a * r_b + b/a * r_c to the plane of triangle ABC. Based on the obtained extension, in regard to all three vertices of the triangle, we get the extension of Erdos-Mordell ...
Geometrical Characteristics and Solid Modeling of the Grasshopper Escapement Mechanism
(Faculty of Civil Engineering and Architecture ; Serbian Society for Geometry and Graphics SUGIG, Niš ; Beograd, 2014)
This paper presents the geometrical properties of one special type of escapement mechanism – the grasshopper escapement, by which the first marine chronometers were equipped. The most important and distinguish mechanical ...
Are Vauban's Geometrical Principles Applied in the Petrovaradin Fortress?
(Birkhauser Verlag AG, 2014)
There is a widespread opinion in different sources, ranging from popular to scientific, that the project of the Petrovaradin Fortress was conceived under the influence of the most important European military engineer and ...
The Structural Transformation of Concave Cupolae of Fourth Sort Using Different Variants of Constructive Procedure, 4th International Scientific Conference on Geometry and Graphics
(Faculty of Civil Engineering and Architecture ; Serbian Society for Geometry and Graphics SUGIG, Niš ; Beograd, 2014)
Concave Cupolae of fourth sort (CC IV) are polyhedra which lateral surface is created by folding a quadruple strip of equilateral triangles, while the bases are regular polygons. The unit cell that forms the deltahedral ...
Some aspects of contemporary trends in civil engineering
(Peoples' Friendship University of Russia, 2014)
In this research several topics concerning contemporary civil engineering and architecture are introduced: problems regarding structural system choice (with respect to the geometric design of the building), suitable ...
Where f(z)/f'(z) is univalent?
(Springer, 2014)
Univalence of quotient of analytic functions
(Elsevier, 2014)
Starlikeness of sections of univalent functions
(Rocky Mountain Mathematics Consortium, 2014)
Let S be the class of all normalized analytic
and univalent functions in the unit disk D. In this paper, we
determine condition so that each section sn(f, z) of f ∈ S is
starlike in the disk |z| < rn. In particular, ...
Managing rail service life
(Croatian Metallurgical Society, 2014)
The service life Of tails depends especially on the operational loads and speeds on the railway lines; as well as on the rail maintenance policy. There are multiple aspects of rail maintenance optimization. The following ...