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vol. 10, no. 4, 2014

ANALYSES OF HEAT TRANSFER THROUGH WALLS OF THERMAL TECHNICAL SPACES WITH COMPUTER HELPING

The paper describes research work on methods concerning heat transfers through walls of thermal technical chambers. This paper is focused on the new concept of thermal analysis derived from harmonic character of temperature changes in building environment with aspect on conductive heat transfers through walls.. The paper presents exemplary measurement results taken in Lublin region during various periods throughout a year. The purpose for the research is to point out areas subjected to the highest energy losses caused by building’s construction and geographical orientation of walls in the aspect of daily atmospheric temperature changes emerging on chamber exterior.

A SEMANTIC FRAMEWORK FOR GRAPH-BASED ENTERPRISE SEARCH

Various recent studies have shown that in many companies workers can spend near half of their time looking for information. Effective internal search tools could make their job more efficient. However, a killer application for this type of solutions is still not available. This paper introduces an envisioned architecture, which should represent the foundations of a new generation of tools for searching information within enterprises.

THE IDENTIFICATION PROPERTIES OF POROUS FOAM

The aim of this work is to develop methods of describing the properties of such materials based on knowledge of: basic materials, technologies (gas pressure formed during foaming) using the theory of hyperplastic materials. The resulting description can be used for the applicability of hyperelastic models, and therefore in the whole range of deformation of the polymer-based composites and elastic composites of metals (not included plasticity). Thesis presents analysis methods of hyperelastic materials using Finite Elements Method. Using FEM it is possible to verify used material, define materials models and show effectiveness of designed component without performing expensive impact tests. Presented methods and applications of the characteristics of hyperelastic materials and composites with the gas phase are used to determine the proper selection of parameters (material properties), increasing the opportunities for a proper assessment of the effectiveness of safety devices.

MULTIAGENT SYSTEMS IN MODULAR ROBOTICS

The article describes the use of a multi-agent system in modular robotics. Multi-agent systems originated as an extension of the field of distributed artificial intelligence which allows understanding the individual modules as independent agents. By adopting this concept, design direction, which gives the robot a new quality, which is based on the possible effective reconfigure its kinematic and functional structure, thereby taking advantage of the original robot modules generate new variants of the robot with the required new parameters and behavior.

VIBRATION DIAGNOSTICS OF FOOTBRIDGE WITH USE OF ROTATION SENSOR

The benefits of the additional measurement of rotational degrees of free-dom on the performance of the vibration diagnosis of bridges are studied in this paper. The common vibrational diagnostics that uses translational degrees of freedom is extended by measurements of rotations. The study is curried out on a footbridge and the presence of damage as well as its location and size is determined with use of FEM updating procedure. The results showed that rotational degrees of freedom significantly improve the effectiveness of the vibrational method.

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