Browsing by Author "Mirek, Grzegorz"

Now showing 1 - 4 of 4

Access status: Restricted ,
Development and Maintenance of Microservices applications with DevOps methodology
(Data obrony: 2016-12-15) Mirek, Grzegorz
Wydział Informatyki, Elektroniki i Telekomunikacji
Access status: Open Access ,
Hallotron sensor system for control of robotized total station operations to monitor movements of building structures
(2010) Mirek, Grzegorz; Lenda, Grzegorz; Kocierz, Rafał
The paper presents a measuring system designed to monitor displacements and deformation of engineering structures. The main concept of the system is a control of ATR type robotized total station operation by specially designed sensors operating on the base of Hall effect and denoting the displacements occurring within the tested object in real time. This allows to quickly detect existing deformations and taking appropriate countermeasures, what is particularly important, e.g. at structure test loading. A specific electronic module of hallotron sensors was designed and built to be utilized within the system. A suitable system control software was also prepared, in order to facilitate the communication of sensors with a computer.
Access status: Open Access ,
Parametrization of spline functions to describe the shape of shell structures
(2013) Lenda, Grzegorz; Mirek, Grzegorz
Description of the shape of shell structure surfaces by means of spline functions is a competitive method of approximation to the approximation with a surface of the second degree. They allow us to present local deformations of the structure. However, they demonstrate sensitivity to a variety of factors, among which the most important is related to the shape of the structure, determining the appropriate choice of spline function arguments. Determining of the arguments is carried out in the so-called parametrization process, which is crucial for the accuracy of the obtained approximations. This paper focuses on the application and comparison of several popular parametrization methods for approximating the shape of the surface of shell structures. The main task of the conducted test study was to select the parametrization method bringing the most accurate results for the description of the structures measured with a not too high density of points (every tens of centimeters - meters) for example, using popular reflectorless total stations. For this purpose, two test models were analyzed, with one- and multi-directional variable curvature, from which sets of points distributed alternately were considered, used to construct spline surfaces and to determine the deviations of the surfaces from the test models. The study involved three most common types of parametrization [2-4]: with a fixed distance, with the distance between the points and with its root. The conducted analysis of the results allowed us to identify the most accurate parametrization method to describe the shape of the shell structure surface.
Access status: Restricted ,
Tribologiczne właściwości warstwy kompozytowej w odlewach z miedzi i staliwa
(Data obrony: 2010-11-17) Mirek, Grzegorz
Wydział Odlewnictwa