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This paper aims to provide insight into various properties of live lectures from the perspective of sophomore engineering students. In an anonymous online survey conducted at the Faculty of Electrical Engineering and Computing, University of Zagreb, we investigated students' opinions regarding lecture attendance, inherent disadvantages of live lecture as a teaching method, lecture interactivity, and the importance of different types of learning materials. The findings derived from students' reported data suggest that students are well aware of a number of limitations of live lectures as a teaching method, yet despite that awareness, it rarely affects their decision to attend live lectures or not. Implications of the findings for live lectures are addressed in the paper, as well as recommendations for future research.

There is a large variety of lecture capture forms being used today when considering their content and ways in which that content is being reproduced. The objective of this study was therefore to investigate the students' perception and the learning potential of lecture captures enriched using additional learning contents compared to lecture captures containing only the video and audio recording of the lecturer and his slideshow. In an experiment in which students were learning using each of those two types of learning materials, a slight yet unsignificant difference was observed in favour of learning from rich lecture captures. Students' survey responses indicated they prefer rich lecture captures for learning and that their availability would not necessarily have a negative impact on students' live lecture attendance rates. These results suggest that even though students prefer rich lecture capture materials for learning, they did not prove to be more efficient in achieving the desired learning outcomes. Additional research would be needed to verify this conclusion on more complex subjects.

Network performance highly depends on efficiency of the firewall because for each network packet which enters or leaves the network a decision has to be made whether to accept it or reject it. This paper presents one approach to rule optimization solutions for improving firewall performance. The new software solution has been developed based on relations between rules. Its main purpose is to remove anomalies in ordering of Linux firewall rules and to merge similar rules.Developed rule optimization software (FIRO) is intended to be used with IP Tables Linux firewall command tool, but it can be easily adapted for other tool, as well. FIRO works in several passes through revised rule lists. In each step of optimization process FIRO generates a different rule list. Unlike existing solutions, FIRO also analyzes log rules and takes into account other rule parameters besides IP addresses, ports, protocols and action.

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