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Abstract: Throughout history, crises in human society have often been accompanied by unintentional (misinformation) as well as deliberate (disinformation) spread of false information, dating back to ancient Egypt. However, the rise of online social networks has brought the magnitude of the so-called 'fake news' phenomenon to an unprecedented size. The World Economic Forum identifies disinformation as one of the foremost threats to human society. In our digital society, the rapid and widespread propagation of false information poses significant challenges to democratic processes. This contribution provides an overview of research on the spread of false informationon social networks, with a focus on major global crises such as the U.S. elections, the Covid-19 pandemic, and the war in Ukraine, and presents the results of our ongoing research project in this area.
Keywords: social media, misinformation, disinformation, fake news, simulation modelling
Published in ReVIS: 14.04.2025; Views: 277; Downloads: 1
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Abstract: This study presents a review of research on social media bot detection. Social media bots are used by political and criminal actors for mass distribution of political messages, as well as rumors, conspiracy theories, and other forms of false information. Through the spread of disinformation, bots are eroding the public trust in political and media institutions and integrity of social media. We have examined recent research publication in the field of social media bot detection, including several previous reviews of bot detection research, and identified the methods used in bot detection and issues encountered by researchers. Our review was conducted through a search of 5 main bibliographical databases, which has produced a total of 534 research papers and other publications. This collection was then filtered with exclusion and inclusion criteria to isolate the most pertinent documents, resulting in a focused selection of 49 documents that were analyzed for this review. In the first part of the paper we introduce the phenomenon of fake news within social networks, its connection with social media bot activity, and conclude the introduction with issues caused or exacerbated by bots. In the main part of this paper we first present the results of statistical analysis of the reviewed documents and then introduce the field of social media bot research, followed by an overview of the issues of social media bot detection identified in the reviewed literature, including the evolution of bot concealment techniques and the methodological issues presented in some of the bot detection studies. We then proceed with an overview of the methods and results from the reviewed research papers, structured according to the main methodology used in the examined studies. Our review concludes with examination of the recent trends in social media bot development and related bot detection research.
Keywords: social media, social networks, social media bots, Twitter bots, bot detection, misinformation, disinformation, fake news
Published in ReVIS: 14.04.2025; Views: 287; Downloads: 1
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Abstract: Aviation industry is a key driver of global economic development with over a third of all trade by value sent by air. It represents a highly significant global market with estimated revenue over 840 billion USD in 2023, while the industry directly and indirectly supports an estimated $3.5 trillion (4.1%) of the world's gross domestic product (GDP) through the jobs and services of air industry suppliers, employee spending and serving industries such as tourism. Due to increasing global air passenger demand, the global aviation industry is projected to grow by approximately 25% from 2022 to 2027. However, in some cases the operation of aircraft may still be reliant on outdated technology that could be years or even decades old. Due to safety concerns, the global system of civil aviation is one of the most regulated industries, and every new procedure, technological advancement or device is required to be thoroughly checked by licensed institutions, numerous experts and aviation regulatory authorities. This reasonable approach inevitably leads to difficulties when dealing with noticed problems in any particular field – whether these are flight operations, aircraft maintenance, corporate affairs or general compliance. One of these problems are aircraft communications and data transfers between aircraft and all other groundbased stations. Namely, apart from classical radio links for voice communications, digital radio links for data transmissions have been used for a few decades now. These are ACARS (Aircraft Communications, Addressing and Reporting System) and CPDLC (Controller-Pilot Data Link Communications). These aeronautical communications data links use HF/VHF links and, alternatively, over areas with no or with poor signal coverage, commercial data satellites. However, there are several fundamental problems with data link systems implemented this way. The first problem is that the authenticity of the messages being exchanged cannot be verified. Potential attackers can, without much effort, falsify messages or even pose as a legitimate air traffic control unit or an aircraft crew. Another problem lies in the available bandwidth for VHF data links and the possible maximum transmission speeds reachable: the data transmission speed of VHF channels is very low - usually around 15 Kbit/s, and the best achievable results barely exceed 30 Kbit/s. In addition, the third major problem is message delivery, which is not guaranteed to succeed. There were indeed cases when the sent message did not reach the desired destination or arrived after a long delay of even several minutes. Aside from the mentioned problems, there are still issues related to specific aspects of the used HF/VHF data transmission links, such as signal stability, switching between individual ground radio stations, signal coverage issues etc. Therefore, in this dissertation, the main motive is to explore alternatives and find ways to solve at least some of these problems. The research in this dissertation is based on the usage of the Internet for the transmission of messages, instead of the previous radio data links. During the research it was concluded that the cellular Internet connection, even in today's technically inadequate state in the means of aeronautical needs, meets the conditions to be used as a medium for CPDLC and ACARS connections at flight altitudes up to 10,000 ft. Another goal of the research is to consider and develop the possibility of integrating the CPDLC and ACARS systems into one platform, codenamed IACARP (Integrated Aeronautical Communications, Addressing and Reporting Platform), which would provide the possibility to increase the number of functions and capabilities of both systems. The third intention of the dissertation is to propose and develop a dedicated communication protocol, which will be based on the Internet as a medium for data transmission, which will allow the IACARP platform to use a protocol that is adapted for use in aeronautical operations. In addition to the communications protocol, the dissertation also provides a possible solution for the authentication problem of messages sent within the system, in a way that does not require encryption of those messages. The proposed solution represents a new algorithm for generating a special short code based on which the authenticity of the messages is confirmed. The possibilities of automatically sending individual reports from certain vital aircraft systems to the air traffic control units are also being considered, through the proposed IACARP system. This way of integrating the components yielded another possibility which is thoroughly considered, and that is the remote control of the aircraft by ATC units in cases of emergency situations. Remote control of the aircraft in this way can most likely be achieved since there is a significant number of aircraft equipped with systems that can land them automatically, without much human intervention. Hence, it would be enough to just remotely reprogram the FMC (Flight Management Computer), enter a new flight route that would initiate landing at a suitable airport, as well as to remotely monitor and control the state of vital aircraft systems by giving the appropriate command through the IACARP platform. As the final part of the dissertation, the conclusions and the decision to accept or reject the hypotheses are presented, along with some perspectives and ideas for further research in this area.
Keywords: aeronautical data links, cellular networks, CPDLC, ACARS, air traffic control, message authentication, dedicated communications protocol, doctoral dissertation
Published in ReVIS: 15.03.2024; Views: 1358; Downloads: 40
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Abstract: V magistrski nalogi opišemo in razvijemo proceduralno generacijo v razvojnem okolju Unity. V prvem delu naloge raziščemo zgodovino razvoja proceduralne generacije ter nato primerjamo tri aktualne igre, ki uporabljajo proceduralno generacijo, vendar pa se med seboj razlikujejo po obsežnosti uporabe proceduralne generacije. Nato vse izmed aktualnih iger primerjamo med seboj ter tudi s približki, ki ne vsebujejo proceduralne generacije. V zadnjem delu teoretičnega dela opišemo uporabljena orodja za lasten razvoj proceduralne generacije. Na koncu predstavimo še dva sistema proceduralne generacije, ki jih razvijemo sami. Prvi pristop uporablja algoritem naključne hoje, medtem ko drugi pristop za osnovo uporablja Perlinov šum. Opišemo tako delovanje posamezne proceduralne generacije kot tudi programsko kodo ter nato predstavimo še lastne ugotovitve.
Keywords: proceduralna generacija, Unity, naključna hoja, Perlinov šum, programiranje
Published in ReVIS: 20.09.2023; Views: 1898; Downloads: 37
Full text (5,05 MB)

Abstract: Zahteve in želje potrošnikov ter svetovna globalizacija predstavljajo svet kot enotni trg, kjer se podjetja, različni izdelki in storitve pojavljajo v nepreglednem številu. Ti se potegujejo za našo pozornost in prepoznavnost, saj si potrošniki prve sodbe ustvarjamo na podlagi lastnih in socialno-družbenih občutkov ter določenih prepričanj, ki jih luščimo iz njihove vizualne in komunikacijske identitete. Podjetja lahko opozorijo nase s pravilnim strateškim načrtovanjem, prilagajanjem in konstantnim raziskovanjem uporabniške izkušnje. V magistrski nalogi smo opredelili probleme in rešitve preoblikovanja vizualne in celostne podobe tržne znamke Denig. Raziskovalno delo smo podkrepili tako teoretično kot tudi praktično z izdelavo grafične podobe in korporativne identitete podjetja, z načrtovanjem strategije ter upoštevanjem uporabniške izkušnje pri preoblikovanju. Namen in cilj te naloge smo dosegli z uporabniško usmerjenim oblikovanjem grafične prenove podjetja.
Keywords: tržna znamka, uporabniška izkušnja, uporabniško usmerjeno oblikovanje
Published in ReVIS: 02.12.2021; Views: 3346; Downloads: 72
Full text (18,88 MB)