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Strategies of use of general geographic map as a source of information
Trokšiar, David
The main topic of this thesis are map skills, and the key point of interest are strategies used for map analysis. General reference map was found as a suitable map given its frequent use in the school atlases. The main goal of this study is evaluation of the general reference map analysis strategies in terms of their dimensions, i. e. their repertoire, distribution, efficiency, and adaptability. 20 upper secondary school students participated in an eye-tracking experiment that consisted of the test and the follow-up questionnaire. The eye-tracking data were analyzed qualitatively and quantitatively to obtain information about the strategy dimensions. Results showed that students used broad repertoire of strategies when analyzing the general reference map and they pointed to the most chosen strategies as well. In some cases, students used more than one strategy to solve the task and thus the most frequent strategy combinations were detected. The efficiency of strategies was evaluated based on the students' success rate and the length of the solving cycle which was affected by the type of elements, respectively map content, used for solving the task. The ability to adapt to specific task demand was proven by addition of elements needed into the strategy or using entirely different strategy type. The...
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Strategies of use of general geographic map as a source of information
Trokšiar, David ; Hanus, Martin (advisor) ; Marada, Miroslav (referee)
The main topic of this thesis are map skills, and the key point of interest are strategies used for map analysis. General reference map was found as a suitable map given its frequent use in the school atlases. The main goal of this study is evaluation of the general reference map analysis strategies in terms of their dimensions, i. e. their repertoire, distribution, efficiency, and adaptability. 20 upper secondary school students participated in an eye-tracking experiment that consisted of the test and the follow-up questionnaire. The eye-tracking data were analyzed qualitatively and quantitatively to obtain information about the strategy dimensions. Results showed that students used broad repertoire of strategies when analyzing the general reference map and they pointed to the most chosen strategies as well. In some cases, students used more than one strategy to solve the task and thus the most frequent strategy combinations were detected. The efficiency of strategies was evaluated based on the students' success rate and the length of the solving cycle which was affected by the type of elements, respectively map content, used for solving the task. The ability to adapt to specific task demand was proven by addition of elements needed into the strategy or using entirely different strategy type. The...
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Losses of mitochondria and plastids in the evolution of eukaryotes
Trokšiar, David ; Hampl, Vladimír (advisor) ; Hadariová, Lucia (referee)
- 5 - Abstract: Mitochondria and plastids were acquired by endosymbiotic event, where prokaryotic organism was engulfed by ancestors of extant eukaryotes. There are more known endosymbiotic events in plastid evolution. In primary endosymbiosis cyanobacterium cell was engulfed by heterotrophic eukaryotic organism. In following secondary, tertiary and quaternary endosymbiotic events eukaryotic cell was engulfed by another eukaryote. Mitochondria originated by engulfment of α-proteobacteria. In the evolution of eukaryotes, reduction of mitochondria occurred in many lineages, making living under anaerobic conditions possible. The least reduced form is anaerobic mitochondria, which together with aerobic mitochondria and hydrogen producing mitochondria, possess genome. Hydrogenosomes and the most reduced form mitosomes, does not possess genome. Plastid reductions led to loss of photosynthetic ability. In last years, more examples of organisms that lost entirely their semi- autonomous organelle, are coming. Loss occur at two parasitic representatives of the Alveolata group, and one endobiotic oxymonad. Parasites Cryptosporidium parvum and Hematodinium lost nonphotosyntetic plastid, whereas Monocercomoides lost its mitochondria. Semi-autonomous organelles were dispensable, because all representatives have access to...
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