Problematika šikany na středních odborných učilištích

This bachelor thesis deals with the problem of bullying in secondary vocational schools located in Brno. The questionnaires distributed among students have been aimed at determining their level of bullying awareness, the possible presence of bullying and its various stages. In addition, the role of pedagogical staff in the prevention of bullying has been examined. This thesis includes recommendations on how to identify and solve a bullying problem in its early stage at these schools

Application of Remote Sensing Data in Crop Yield and Quality: Systematic Literature Review

Purpose: Covering current state of the art in the field of application of remotely sensed data in crop quality improvement. Methodology/Approach: Systematic literature review using novel text mining techniques. Findings: Relevance of topic, measured by number of relevant studies, is rising, best performing input data types and modelling techniques are identified. Research Limitation/Implication: Review to a certain point of time in a rapidly evolving field of research. Originality/Value of paper: There was no similar review article on the topic at the time of conducting this research

THE SPECIFICS ASPECTS OF BRAKE FLUIDS EVALUATION IN OPERATION

In the presented article the authors follow selected problems of brake fluids evaluation. The introductory section briefly specifies their application. Next section refers to the degradation effects of practical operation and to the methods and instruments for the evaluation of the selected quality properties of brake fluids

Simulation of hydraulic pump load in laboratory conditions

The aim of the scientific contribution is simulating the load of gear hydraulic pump used in agricultural machinery in laboratory conditions, where the impact of ecological transmission-hydraulic fluid on life limit (flow and efficiency) of gear hydraulic pump GHD1-17R is monitored. Laboratory test equipment was used for the simulation. The equipment was used to perform life limit test of hydraulic pump and to monitor changes in physicochemical ecological energy carriers. The simulation in laboratory conditions took 500 hours. The Vickers test took 100 hours. Transmission-hydraulic fluid MOL Farm NH Ultra was used for simulation. The results were that fluid is appropriate to use in this type of hydraulic pump in agricultural machineries. According to the Vickers test, the fluid is characterized by an increased value of flow and efficiency after 50 working hours, thereby exceeding the specified test values

Degradation of Ecological Energy Carriers Under Cyclic Pressure Loading

The presented work investigates the degradation of an ecological energy carrier in the form of changes in its properties, which was subjected to dynamic loading through a test device in laboratory conditions. The primary goal was to describe the degradation process itself in terms of obtained data through the analysis of kinematic viscosity, water content, acidity number, and X-ray spectrometry. The process was focused on monitoring the values of increase in contaminants and monitoring the values of changes that occurred in case of additives. The ecological energy carrier in the form of transmission-hydraulic fluid was cyclically loaded in a time interval of 200 working hours, while a time interval of every 25 working hours was used when a sample was taken and subsequently analysed. From the obtained data, it can be concluded that during the degradation process, there were no significant changes in the observed properties of the liquid, chemical composition, or additives. For this reason, further measurements of the ecological energy carrier were subsequently carried out. The influence of the given energy carrier on the change in the flow rate of a new type of hydraulic pump with external gearing was also monitored

Influence of Decarbonization on Selected Parameters of ICE

The paper focuses on the area of experimental measurements for monitoring the impact of decarbonization on the technical and environmental parameters of the ICE. The condition for the implementation of the measurements was the selection of an ICE that had driven more than 300,790 km. During the laboratory tests, several test methods were used to assess the technical and emission conditions of the tested ICE with the code designation ALH, which is used in VOLKSWAGEN BORA vehicles. The technical parameters of the tested ICE (corrected power PNorm and torque MMom), emission parameters (absorption coefficient k and NOx emission) and fuel consumption parameters (specific fuel consumption bsfc) were compared and evaluated in the results. The results show that the decarbonization process on the tested vehicle VOLKSVWAGEN BORA 1.9 TDi affected the emission parameters but did not affect the technical parameters and specific fuel consumption