Detection of GNSS signals propagation in urban canyos using 3D city models

This paper presents one of the solutions to the problem of multipath propagation and effects on Global Navigation Satellite Systems (GNSS) signals in urban canyons. GNSS signals may reach a receiver not only through Line-of-Sight (LOS) paths, but they are often blocked, reflected or diffracted from tall buildings, leading to unmodelled GNSS errors in position estimation. Therefore in order to detect and mitigate the impact of multipath, a new ray-tracing model for simulation of GNSS signals reception in urban canyons is proposed - based on digital 3D maps information, known positions of GNSS satellites and an assumed position of a receiver. The model is established and validated using experimental, as well as real data. It is specially designed for complex environments and situations where positioning with highest accuracy is required - a typical example is navigation for blind people

Produktivní kultura vyučování a učení v didaktických kazuistikách

Title in English: Productive culture of teaching and learning in didactic case studies The book introduces the issue of productive culture of teaching and learning in broader didactical context. In the first part of the book, three areas of productive culture of teaching and learning are as theoretical framework presented: 1. clarity, structure, coherence, 2. cognitive activation, instrumentalization, semantization, 3. Supportive learning environment. The second part of the book presents 17 didactic case studies that have been developed by teams that consisted of researchers and teachers from schools. The aim of didactic case studies is to highlight key areas of productive culture of teaching and learning

Energy valuation of systems of ventilation and air-conditioning

The main theme of dissertation theses is systems of ventilation and air-condition used in buildings. Work consists of analyse of this systems and parameters of indoor clime whose are affected by them. It summarizes demands on the process of calculation the energy efficiency of the building services by actual legislative. On one chosen type of building is done the energy simulation of implemented systems of ventilation and air-condition by energy efficiency and their specific need of energy