The paper presents a method of measuring the angle of light polarisation plane rotation. Measurement is done with a tilted fibre Bragg grating (TFBG), with a tilt angle of 7°, and an optical spectrum analyser. Data obtained with the analyser are processed with a Fast Fourier Transform (FFT) to obtain frequency representation (FFT coefficients). The rotation angle is calculated by comparing these coefficients obtained from the measurement with the ones collected during measurement set calibration. It has been shown that FFT coefficients change in the function of polarisation plane rotation and, in the case of some of them, these changes have a regular character and can be used to determine rotation. The method shown works in the range of 0 – 180° of rotation with an average error of 0.076° and a median error of 0.033°. The highest values of errors appear at about 0, 45, 90, 135 and 180°, which is caused by flat characteristics of many frequencies for these angles of rotation. The method discussed could find applications in many fields of structure monitoring and maintenance, where rotation or twist could be used as a quality parameter.

Most of today's web applications run on relational database systems. Communication with them is possible through statements written in Structured Query Language (SQL). This paper presents the most popular relational database management systems and describes common ways to optimize SQL queries. Using the research environment based on fragment of the imdb.com database, implementing OracleDb, MySQL, Microsoft SQL Server and PostgreSQL engines, a number of test scenarios were performed. The aim was to check the performance changes of SQL queries resulting from syntax modication while maintaining the result, the impact of database organization, indexing and advanced mechanisms aimed at increasing the eciency of operations performed, delivered in the systems used. The tests were carried out using a proprietary application written in Java using the Hibernate framework.

This article discusses the implementation of projected changes in the Polish course tertiary education at Computer Science/Information Technology faculties. The project aims at enabling the students to get educated and skilled in view of their prospective IT employers' demands and expectations, and enhancing their offer's attractiveness in the labour market. This is being carried out through cooperation and collaboration with IT businesses for preparation and delivery of targeted education, and through inclusion in the syllabuses of research conducted at the Lublin University of Technology.

Fibre optic sensors are used to measure various physical quantities, including polarisation plane rotation. Existing solutions for measuring the rotation of the plane of polarisation in optical fibres are based on sensors using tilted fibre Bragg gratings (TFBGs). Articles describing the...