Rapporteringen av terroristattentat har fördubblats globalt sedan år 2011. För att motverka terrorismen i världen sägs det krävas en fördjupad kunskap om terroristnätverkens struktur och organisation, vilket kan uppnås genom en social nätverksanalys. Idag återfinns det ett internationellt behov av att jämföra olika typer av terroristnätverk genom social nätverksanalys. En sådan jämförelse kan skapa verktyg för myndigheters brottspreventiva arbete mot terrorismen samt bidra med ny och efterfrågad kunskap om att jämföra olika terroristorganisationer.Studiens syfte har varit att visualisera och undersöka nätverksförändringar över tid rörande nätverksstruktur för både islamistiska och vänsterextremistiska terroristnätverk vid genomförda terroristattentat. I denna sociala nätverksanalys har sex stycken terroristattentat utförda av den vänsterextremistiska terroristgruppen November 17 och den islamistiska terroristgruppen al-Qaida undersökts. Resultaten visade att både visualisering och nätverksstruktur för de enskilda terroristgrupperna har förändrats över tid. Studien har funnit ett flertal likheter mellan November 17 och al-Qaida rörande nätverksstruktur och sammansättning. Skillnaderna mellan terroristgrupperna är att al-Qaida består av fler antal noder och har en lägre densitet än November 17. Visualiseringen av nätverken visade även att November 17 efterliknar en clique. / The reporting of terrorist attacks has doubled globally since 2011. To counter and understand terrorism in the world, there is a need for an in-depth knowledge of the structure of terrorist networks and organizations, which can be achieved through social network analysis. Today there is an international necessity to compare different types of terrorist networks through social network analysis. Such a comparison can create tools for the authorities' crime prevention against terrorism and contribute with new and requested knowledge about comparing different terrorist organizations.The aim of the study has been to visualize and investigate network changes over time regarding network structure for both Islamic and left-wing terrorist networks during terrorist attacks. In this social network analysis, six terrorist attacks by a left-wing extremist terrorist group, November 17 and an Islamic terrorist group, al-Qaeda have been studied. The results showed that both visualization and network structure for the individual terrorist groups have changed over time. The study has found numerous similarities between November 17 and al-Qaeda regarding network structure and composition. The differences between the terrorist groups is that al-Qaeda consists of more numbers of nodes and has a lower density than November 17. The visualization of the networks also showed that November 17 mimics a clique.

The topic of this diploma thesis is the media image of the Velvet Revolution related to various conspiracy theories. This view can be traced in Czechoslovak (and later Czech periodicals) on the basis of predetermined storylines. The specified period for the analysis of individual elements of these theories is from November 17, 1989 to about mid-1993, or earlier if the periodical ceased to be published. The period of the Velvet Revolution is a fundamental period of our republic, which at this time underwent an economic, political, social transformation… And few aspects of everyday life remained the same as before the revolution. Because this change took place so suddenly and so quickly, a lot of rumors, misinformation, and conspiracy theories began to spread to explain to some extent what had happened, especially if they did not like the officially recognized version of events. It is these alternative explanations of the events of that time that are the subject of this work. I will analyze them in a total of 7 titles, in Rudé právo, Lidové noviny, Studentské listy, Respekt, Květy, Špígl and Analýza 17 listopadu by Miroslav Dolejší. First, I will introduce the theoretical basis of concepts such as conspiracy theory, misinformation, ect., with which I will continue to work. I will also outline the...