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Penic M.,Aleksandra Medvedeva 14 | Vatin N.,Saint Petersburg State University | Murgul V.,Saint Petersburg State University
Applied Mechanics and Materials | Year: 2014

Double skin facade is one of the possible approaches to bioclimatic design. Bright architectural expression is combined with lots of potential natural heating and ventilation of the internal space of buildings. Double skin facade considered as an element of building heating, ventilation, or, finally, as an element of conditioning in the building. The article provides a classification of Double skin facade, analyzes the advantages and disadvantages Double skin facade. © (2014) Trans Tech Publications, Switzerland. Source

Mijalkovic M.,Aleksandra Medvedeva 14 | Petrovic Z.,Aleksandra Medvedeva 14 | Hadzimujovic M.,State University of Novi Pazar | Mladenovic B.,Aleksandra Medvedeva 14
Tehnicki Vjesnik | Year: 2013

Determination of the bearing capacity of a structure is very valuable, not only as a simple control of structural bearing capacity, but also as a significant basis and factor in designing of structures. Limit load of structures determined by application of the limit analysis is one of the indicators of bearing capacity of structure exposed to the action of proportional load. When the structure is exposed to the action of variable repeated load, the limit theorems do not yield the adequate solutions, thus the adaptation theorems which made safe limit load determination possible were developed simultaneously. By applying the limit and shakedown analysis in this paper structural analysis of frame structures with different degrees of static indeterminacy was carried out. Also displayed is the difference between the values of failure forces depending on the character of load and ratio of height and width of frame in order to assess justification for application of the shakedown method in the analysis of the limit bearing capacity of the frame structures. Source

Milenkovic N.Z.,Aleksandra Medvedeva 14 | Stankovic V.V.,Aleksandra Medvedeva 14 | Milic M.L.,Aleksandra Medvedeva 14
Journal of Electrical Engineering | Year: 2015

In modern computing technique, calculation of leading zeros in a data represented as strings of digits is used very often. Those techniques require high speed of the circuit, as well as its fast design. In this paper we propose a design of such a counter, which is applicable to data length of w = 4j bits, for 4 < j ≤ 8. With this solution it is also possible to process longer data, since the suggested technique offers a good modularity. This is very important, considering the current technology scaling trends. In this paper, a delay behavior of the proposed circuit has also been investigated using equations and VHDL simulation based worst-case delay estimation method. The results show a significant improvement of the circuit speed, compared to the known solutions. © 2015 FEI STU. Source

Peric Z.H.,Aleksandra Medvedeva 14 | Velimirovic L.Z.,Aleksandra Medvedeva 14 | Dincic M.R.,Aleksandra Medvedeva 14
Journal of Electrical Engineering | Year: 2014

In this paper, linearization of the optimal compression function is done and hierarchical coding (by coding the regions firstly and then the cells inside the region) is applied, achieving simple and fast process of coding and decoding. The signal at the entrance of the scalar quantizer is modeled by Laplacian probability density function. It is shown that the linearization of inner regions very little influences distortion and therefore only the last region should be optimized. Two methods of optimization of the last region are proposed, that improve performances of the scalar quantizer, and obtained SQNR (signal-to-quantization noise ratio) is close to that of the nonlinear optimal compression function. © 2014 FEI STU. Source

Petronijevic P.,Aleksandra Medvedeva 14 | Zdravkovic S.,Aleksandra Medvedeva 14 | Mladenovic B.,Aleksandra Medvedeva 14 | Zlatkov D.,Aleksandra Medvedeva 14 | Momcilovic-petronijevic A.,Aleksandra Medvedeva 14
Tehnicki Vjesnik | Year: 2014

In the cases when expansion joints between adjacent buildings are not sufficient, certain parts of the structure collide during earthquake. Then it comes to local damage or even destruction of parts of the building because of the impact forces of great intensity. In order to avoid collision, particular attention has to be paid to design of aseismic joints. In the paper, a parametric analysis of the potential collision of two multi-storey buildings is carried out by the use of software package SAP2000v15, with the goal to examine what occurs if the expansion joints have been designed in compliance with Serbian standards, and if yet there are collisions in some cases. The flexible base model in interaction with soil was designed. The accelerograms of real earthquakes were applied in dynamic analysis. Quantities of seismic forces, bending moments and axial forces in the case of collision, as well as necessary width of expansion joints to avoid it, were computed. Conclusions about influence of considered parameters on collision occurrence were accomplished. © 2014, Strojarski Facultet. All rights reserved. Source

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