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Mobile Application Monitoring Using TLS Fingerprints
Kočí, Jan ; Grégr, Matěj (referee) ; Matoušek, Petr (advisor)
The main purpose of this thesis is to study the possibility of using TLS fingerprints for mobile application monitoring and apply these methods to monitor network flows created by the Flowmon probe. To create the fingerprints the JA3 and JA3S methods are used. Apart from the TLS fingerprints, the implemented classifier uses SNI values to classify input flows. First, a dataset containing fingerprints of selected applications is created. This dataset is used together with the implemented classifier to classify input flows. Following is a description of the proposed classification methods and the implemented classifier. The classifier is evaluated using the Accuracy, Precision and Recall evaluation metrics. Finally, the classifier is used in several experiments that demonstrate its possible applications.
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Recommender System for Web Articles
Kočí, Jan ; Kesiraju, Santosh (referee) ; Fajčík, Martin (advisor)
Tématem této bakalářské práce jsou doporučovací systémy pro webové články. Tato práce nejdříve uvádí nejpopulárnější metody z této oblasti a vysvětluje jejich principy, následně navrhuje požití vlastní architektury, založené na neuronových sítích, která aplikuje metodu Skip-gram negative sampling na problematiku doporučování. V další části pak implementuje tuto architekturu společně s několika dalšími modely, požívající algoritmus SVD, collaborative filtering s algoritmem ALS a také metodu Doc2Vec k vytvoření vektorové reprezentace z obsahu získaných článků. Na závěr vytváří tři evaluační metriky, konkrétně metriky RANK, Recall at k a Precision at k, a vyhodnocuje kvalitu implementovaných modelů srovnáním výsledků s nejmodernějšími modely. Kromě toho také diskutuje o roli a smyslu doporučovacích systémů ve společnosti a uvádí motivaci pro jejich používání.
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Automated Truth Discovery
Kočí, Jan ; Ondřej, Karel (referee) ; Fajčík, Martin (advisor)
Cílem práce je (i) porozumět jaké vlastnosti textu jsou využívány content-based metodami při klasifikaci fake news a (ii) vyhodnotit kvality těchto metod na určování spolehlivosti článků a zdrojů. Práce implementuje dva klasifikační modely. První model (baseline), je založen na TF-IDF a Multinomial Naive Bayes klasifikátoru. Druhý model používá architekturu BERT transformeru. K interpretaci výsledků těchto modelů jsou v práci implementovány metody interpretability. Metoda interpretability pro BERT model je založena na Integrovaných gradientech. K trénování obou klasifikátorů je v práci použita datová sada NELA-GT-2021, která je předzpracována vyfiltrováním klíčových slov. V práci je také představena nová datová sada nazvaná FNI dataset. Tato sada obsahuje 46 manuálně vybraných článků a je použita k analýze klasifikátorů. FNI dataset umožňuje analyzovat klasifikátory na článcích z různých oblastí (například covid, fotbal, věda, politika, etc.). Výsledky analýzy odhalily několik nedostatků vytvořených klasifikátorů. Baseline model nebyl schopen správně klasifikovat nedůvěryhodné články na téma fotbal (recall 0\% na FNI datasetu), důvěryhodné vědecké články (recall 0\% na FNI datasetu), etc. Oba klasifikátory byly úspěšnější v identifikování nedůvěryhodných článků. BERT model dosáhl recall 91\% pro třídu unreliable a pouze 78\% pro třídu reliable na FNI datasetu. Metody interpretability dosahovaly také lepších výsledků na třídě unreliable kde se jim dařilo identifikovat šokující titulky používané ve fake news. Klasifikátory jsou také použity k určení důvěryhodnosti zdrojů. Jejich výsledky jsou srovnány s referenčními hodnotami získanými ze state-of-the-art metody, která posuzuje věrohodnost zdrojů na základě vzájemných citací. Jedním z výstupů práce je také challenge datová sada, obsahující články z NELA datasetu, které klasifikátory nedokázaly správně klasifikovat. Tato datová sada může být použita pro budoucí výzkum v tomto oboru.
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The law of business corporations riding on the wave of digitalisation
Kočí, Jan ; Čech, Petr (advisor) ; Hurychová, Klára (referee)
The law of business corporations riding on the wave of digitalisation The topic of this diploma thesis is the law of business corporations riding on the wave of digitalisation. Due to the spread of the topic, the author decided to narrow it down. Therefore, the thesis focuses solely on online establishment of a limited liability company in the Czech Republic and attempts to answer the question if any limited liability company in the Czech Republic can be established online within several minutes. The thesis is divided into three main chapters. In the first chapter the reader is provided with an insight into the legal regulation of electronic identification by the virtue of electronic identification being the key for digitalisation of this part of the company law. Its near future is also partly explained in this thesis due to the fact that the legal regulation of electronic identification and thus its technical side will most likely undergo major changes in the next few months. The second chapter is dedicated to the amendment of the notary code, which introduced the possibility of writing a notary record in an electronic form. This option for notaries is the second key innovation that enables the establishment of a limited liability company in the Czech Republic online. However, in this chapter the...
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Mobile Application Monitoring Using TLS Fingerprints
Kočí, Jan ; Grégr, Matěj (referee) ; Matoušek, Petr (advisor)
The main purpose of this thesis is to study the possibility of using TLS fingerprints for mobile application monitoring and apply these methods to monitor network flows created by the Flowmon probe. To create the fingerprints the JA3 and JA3S methods are used. Apart from the TLS fingerprints, the implemented classifier uses SNI values to classify input flows. First, a dataset containing fingerprints of selected applications is created. This dataset is used together with the implemented classifier to classify input flows. Following is a description of the proposed classification methods and the implemented classifier. The classifier is evaluated using the Accuracy, Precision and Recall evaluation metrics. Finally, the classifier is used in several experiments that demonstrate its possible applications.
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History of Znojmo's brewery (1363-2010)
Kočí, Jan ; Foltýn, Dušan (advisor) ; Hruška, Libor (referee)
History of Znojmo's brewery (1363-2010) - abstract The content of this Bachelor Degree Thesis is the complete history and building development of the only remaining Znojmo brewery in the period of 1720 to 2010, a brewery that is no longer operating. At the same time, this thesis describes the history of brewing in Znojmo begining from the first sings in the 13th century (emphasising 1363 which was a legendary year for Znojmo's brewing) till 2010 when the last brewery in Znojmo was completely closed and the tradition of brewing in Znojmo lasting for almost 700 years was interrupted. The following chapters describe for example the origin of the name "Hostan", the present name of Znojmo's beer, concentrating to all products, once produced in Znojmo brewery, and awards that once famously delicious Znojmo's beer Hostan received all round the Czech Republic. The thesis completely summarizes all the years of Beer Festival - a modern tradition that arose thanks to the existence of brewery and ceased, when the brewery was closed. Everything is accompanied with period photographs, copies of old documents, portraits of important celebrities, graphs indicating beer production in Znojmo in the course of time, exterior and interior photographs of all buildings, etc. This Bachelor Degree Thesis is the first completely...
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Recommender System for Web Articles
Kočí, Jan ; Kesiraju, Santosh (referee) ; Fajčík, Martin (advisor)
Tématem této bakalářské práce jsou doporučovací systémy pro webové články. Tato práce nejdříve uvádí nejpopulárnější metody z této oblasti a vysvětluje jejich principy, následně navrhuje požití vlastní architektury, založené na neuronových sítích, která aplikuje metodu Skip-gram negative sampling na problematiku doporučování. V další části pak implementuje tuto architekturu společně s několika dalšími modely, požívající algoritmus SVD, collaborative filtering s algoritmem ALS a také metodu Doc2Vec k vytvoření vektorové reprezentace z obsahu získaných článků. Na závěr vytváří tři evaluační metriky, konkrétně metriky RANK, Recall at k a Precision at k, a vyhodnocuje kvalitu implementovaných modelů srovnáním výsledků s nejmodernějšími modely. Kromě toho také diskutuje o roli a smyslu doporučovacích systémů ve společnosti a uvádí motivaci pro jejich používání.
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Effects and benefits of strength training on the human body for individual client
KOČÍ, Jan
This bachelor thesis deals with summary of basic information related to power training. The bachelor describes individual aspects connected with this kind of exercise, from basic physiology, through benefits and negatives, to analysis of particular types of power load. The practical part includes examples of power exercises and their effect on the human body at three studied individuals who have undergone a three-month training program. The aim of this work was to confirm the positive effect of power exercise on the human body through a questionnaire method. Based on the facts given research has been shown to increase power options, improved psychological well-being and lifestyle of the individual subjects. Regular exercise has an overall positive effect on our body, so it is important not to neglect the active way of life and even in today's timeconsuming
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Ruined sacred buildings of royal town Znojmo and the nearest surroundings
Kočí, Jan ; Foltýn, Dušan (advisor) ; Havlůjová, Hana (referee)
TITLE: Ruined sacred buildings of royal town Znojmo and the nearest surroundings AUTHOR: Bc. Jan Kočí DEPARTMENT: The History and History Didactics Department SUPERVISOR: Mgr. Dušan Foltýn ABSTRACT: The content of my thesis is a summary of all so far discovered sacral buildings in the territory of the royal town Znojmo, that have not been preserved, but that were destroyed or rebuilt. Gradually there are described defunct the Great Moravian buildings, the medieval and the modern buildings. A special part is the chapter of defunct sacral buildings of the cemetery. Defunct sacral buildings in Znojmo were studied from the perspective of historical, architectural and from the viewpoint of current status and utilization. Personal contribution to this work is a restoration viewpoint and pointing out options to improve the situation. To study were used the primary sources from the archival collections in Znojmo, Czech and German regional literature, files of contemporary periodicals, postcard of the secondary modern literature. The possibility of consultations with local historians and a personal visitation of all described sites for creating custom preview and photos were used as well. This thesis is not the first register of defunct sacral buildings in Znojmo, however is the first complete register, which is...
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History of Znojmo's brewery (1363-2010)
Kočí, Jan ; Foltýn, Dušan (advisor) ; Hruška, Libor (referee)
History of Znojmo's brewery (1363-2010) - abstract The content of this Bachelor Degree Thesis is the complete history and building development of the only remaining Znojmo brewery in the period of 1720 to 2010, a brewery that is no longer operating. At the same time, this thesis describes the history of brewing in Znojmo begining from the first sings in the 13th century (emphasising 1363 which was a legendary year for Znojmo's brewing) till 2010 when the last brewery in Znojmo was completely closed and the tradition of brewing in Znojmo lasting for almost 700 years was interrupted. The following chapters describe for example the origin of the name "Hostan", the present name of Znojmo's beer, concentrating to all products, once produced in Znojmo brewery, and awards that once famously delicious Znojmo's beer Hostan received all round the Czech Republic. The thesis completely summarizes all the years of Beer Festival - a modern tradition that arose thanks to the existence of brewery and ceased, when the brewery was closed. Everything is accompanied with period photographs, copies of old documents, portraits of important celebrities, graphs indicating beer production in Znojmo in the course of time, exterior and interior photographs of all buildings, etc. This Bachelor Degree Thesis is the first completely...
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