Mobile Class Register as an example of mobile web-application

Trendy cyfryzacji i mobilności oferowanych obecnie usług na rynku dotykają wszystkich aspektów życia codziennego. Użytkownicy nowych technologii stają się oraz bardziej mobilni, oczekują dostępu do informacji, który będzie wymagał jak najmniej czasu. Niniejszy artykuł przedstawia charakterystykę systemu Mobilnego Dziennika Szkolnego jako aplikacji internetowe), która umożliwia dostęp do informacji z poziomu urządzeń mobilnych.Nowadays mobile services are gaining more and more popularity. Users of new technologies expect to get information as quickly as possible. There is a need of providing them in an user-friendly way basing on mobile devices. This article describes the characteristic of authors' IT system named "Mobile Class Register", that allows users to get instant access to information about student's educational process

Modelling characteristics of spark ignition engine injection system

The carried out modelling of SI engine injection system characteristics in various steady-state conditions has been presented in the article. Also, the two ways of determining injection time have been shown: by means of a virtual model made with the use of software worked out by National Instruments LabVIEW and on the experimental test stand ‘’Integrated injection-ignition system of the K16 engine”

Optimization of Fiber Optic Sensors Parameters for Temperature Measurement

Nowadays, there are many devices the failure of which could not only lead to huge financial losses but also wreak havoc in the natural environment. Such circumstances require us to analyze the electrical components before something dangerous happens. Early reaction gives an opportunity to implement prevention measures and avoid serious consequences. Optical fiber sensors have a number of advantages, the most important of which include immunity to electromagnetic interference, low weight and the ability to incorporate them within the measured structure. Fiber Bragg gratings have other special advantages; for instance, they enable the creation of distributed sensing arrays, which contain multiple sensors. They are also insensitive to optical power source fluctuations. The multitude of FBG sensors applications extorted fabrication of gratings with different spectral shapes. Uniform gratings have spectra with strong side lobes which could affect the processing characteristics of temperature sensor. Apodization is one of ways for affecting the gratings spectral shape. This article concerns simulations based on an original computer application, which is numerical model implementation of Transfer Matrix Method. It allows to determine the spectral characteristic of optical components on the basis of the theory of coupled modes and matrix description of electromagnetic wave that passes through optical fiber. Different fiber gratings lengths were analyzed according to their reflection and transmission spectra. In the beginning, the impact of various parameters on the Bragg grating spectral characteristics was checked. Results of those simulations have been attached. The article covers measurement of real optic elements put in climatic chamber and Bragg gratings, produced under very strict conditions. The profile of the laser beam was approximated by Gaussian function using MatLab software and additional tools from package. Function matching has been defined as statistical parameters and evaluated later. The comparison of mathematical model and physical optical system, based on previously designated function apodization, has been covered. The results of these two visualizations have been summarized to better exemplify the differences and similarities. The previously measured fiber Bragg grating has been proposed as temperature sensor and parameters which may be used to construct an optical fiber temperature sensor were established. Temperature sensitivity was determined in the end