1. Interactions of azole molecules with copper ions and copper surfaces covered with chemisorbed H, O, Oh or Cl : doctoral dissertationMatjaž Dlouhy, 2023, doktorska disertacija Opis: In real environments, copper and other metal surfaces are never clean. Even during active dissolution in corrosion, they are likely to be covered with adsorbed corrosion-relevant species such as O, OH, H, and Cl. To explore the impact of such species on the bonding of imidazole, used herein as an archetypal model of azole corrosion inhibitors on Cu(111), we conducted a systematic computational study based on the Density-Functional Theory. Over 400 diverse adsorption configurations were considered, with close attention paid to the effects of variables such as surface coverage, the type of corrosion-relevant species, and the distance between the imidazole molecule and the corrosion-relevant species. We demonstrate that O and Cl enhance the adsorption bonding of imidazole, while H has almost no effect, and OH either diminishes or has a negligible impact on the imidazole adsorption. The effect of the adsorbed corrosion-relevant species on the imidazole adsorption usually diminishes with the increasing distance between adsorbed species and imidazole, and with decreasing coverage of corrosion-relevant species. We identified three coadsorption effects of O, OH, H, and Cl on the non-dissociative adsorption of imidazole, including hydrogen bond formation, enhancement of the N–Cu bond, and work-function change induced by coadsorbates. We also found that if the coverage of corrosion-relevant species is too high, then the chemisorption of imidazole is prevented either sterically or due to the unavailability of free surface sites. Moreover, our study shows that chemisorbed O and OH species promote deprotonation of azole molecules on the investigated copper surfaces, as exemplified by benzotriazole, imidazole, and Cu(111). The N–H bond cleavage is involved in such deprotonation. By undergoing molecular deprotonation during adsorption, the resulting adsorption states are more stable, which increases the persistence of chemisorbed azole molecules. Our findings demonstrate that deprotonated benzotriazole molecules exhibit stability that is roughly 1 eV higher on O/Cu(111) and OH/Cu(111), compared to an adsorbed intact molecule on bare Cu(111). However, for imidazole, the degree of stabilization is significantly weaker and ranges from 0.1 to 0.5 eV. Further, we investigated the formation of coordination complexes between copper central ions and 19 different N-heterocyclic inhibitor molecules in an aqueous medium, using a cluster/continuum model, which involves a few explicit water molecules and the surrounding water described implicitly. Our results indicate that most of the investigated ligands have the potential to coordinate with Cu(I) and Cu(II) ions, forming stable two- or fourcoordinated complexes, respectively. The thermodynamic stability of these coordination compounds was also evaluated.
Ključne besede: copper, corrosion, azole corrosion, doctoral dissertation
Objavljeno v ReVIS: 06.05.2026; Ogledov: 297; Prenosov: 10
 Celotno besedilo (94,45 MB) |
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3. Development and employment of untargeted and targeted tools for virus detection in the frame of water-based epidemiology : doctoral dissertationOlivera Maksimović, 2023, doktorska disertacija Opis: Traditional methods of studying viruses are limited in their ability to detect novel pathogens, but recent advances in high-throughput sequencing (HTS) are changing that. HTS allows researchers to probe deeply into the virome of various hosts and environments, identifying known and unknown viral species. However, a targeted approach, like quantitative PCR, remains the golden standard for large-scale quantitative studies. The increasing popularity of water-based epidemiology (WBE) to monitor wastewater for pathogens has become particularly widespread with surveillance of SARS-CoV-2 during the COVID-19 pandemic. Optimizing this procedure demands an evaluation of the stability of the virus in wastewater and a suitable concentration method for improving detection sensitivity. Real-time quantitative reverse transcription PCR (RT-qPCR) is the primary method used for detecting SARS-CoV-2, and validation of assays using appropriate reference materials and matrices is crucial. Plant viruses present similar challenges, with tomato brown rugose fruit virus (ToBRFV) being highly stable and potentially infectious for extended periods in water. Detection of ToBRFV in Slovenian wastewater before detection in plant samples raises concerns about the virus’ s origin, undetected presence, waterborne transmission risks, and using such water sources for agricultural irrigation during water scarcity. Simple and effective methods for ToBRFV concentration and detection from water samples are essential to analyze potential release from infected plants into water sources. Metagenomics analysis of environmental water used in irrigation can provide insight into the types of viruses to which plants are exposed, shedding light on virus transmission dynamics in agricultural settings and aiding in developing effective management strategies. It is a valuable tool for detecting known and unknown viral species in the ecosystem under investigation, providing an early warning system to prevent potential outbreaks. By applying knowledge and techniques from wastewater monitoring for human pathogens, it may be possible to detect plant viruses in irrigation water. In conclusion, advances in HTS-based metagenomics research and WBE can revolutionize virus detection and surveillance in human and plant systems.
Ključne besede: high-throughput sequencing, water-based epidemiology, viruses, doctoral dissertation
Objavljeno v ReVIS: 23.04.2026; Ogledov: 292; Prenosov: 2
Celotno besedilo (39,42 MB) |
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5. Licit and illicit drugs in waste- and environmental waters: epidemiological and environmental implicationsTaja Verovšek, 2023, doktorska disertacija Ključne besede: licit drugs, illicit drugs, new psychoactive substances, water ecosystems, surface water, groundwater, educational institutions, doctoral dissertation
Objavljeno v ReVIS: 22.04.2026; Ogledov: 203; Prenosov: 1
Celotno besedilo (28,04 MB) |
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8. A novel approach to aviation data links and data exchange between aircraft modules : doctoral dissertationIlija Subotić, 2023, doktorska disertacija Opis: 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.
Ključne besede: aeronautical data links, cellular networks, CPDLC, ACARS, air traffic control, message authentication, dedicated communications protocol, doctoral dissertation
Objavljeno v ReVIS: 15.03.2024; Ogledov: 2457; Prenosov: 53
Celotno besedilo (13,29 MB) |
9. A decision support system for identity and access management : doktorska disertacijaMiljenko Hajnić, 2022, doktorska disertacija Opis: Managing redeployment of employees is a complex and highly demanding process for a company’s decision-makers in the human resources department since it requires fast responsiveness, in particular when there is a huge amount of requests and activities required to answer the organizational needs. Redeployment requires multiple evaluations of employees and organizational units involving many attributes, such as education, skills, work experience, and distance from the workplace, to name a few. Consequently, every redeployment task causes a new cycle of granting new access rights to the company’s application software. Since the whole granting access procedure can take from several hours up to several days, depending on the number of IT administrators and the number of employees’ user accounts that have to be appropriately configured, the cost of employee redeployment is directly reflected through the overhead expense for employees while they wait for their user account to be updated, and in the meantime, the company’s income will be lower than the projected one. To address this problem, this doctoral thesis focuses on the importance of key service interoperability and the development of software components that enable the integration of the decision model with Human Resources Management software and Identity and Access Management software into the decision support system in order to increase the company’s efficiency and effectiveness. Key service interoperability was achieved by first developing a decision support model using the Decision EXpert (DEX) method. The developed DEX model was applied for a logical base in the development of the web-based application.
We developed a custom web-based application that evaluates multiple entities at once and proposes several appropriate alternatives ranked by three novel algorithms that we developed for three different contexts of employee redeployments. Our web-based application is a software prototype designed for easy integration with other business applications involved in the process of employee redeployment. Finally, we performed several process simulations to conceptually test the possibility, feasibility and profitability of software improvements and integrations.
Ključne besede: decision support, decision expert, human resources, redeployment, identity and access management, doctoral dissertation
Objavljeno v ReVIS: 25.02.2022; Ogledov: 3442; Prenosov: 111
Celotno besedilo (2,31 MB) |
10. Social identity in the European model of citizen's participation in Slovenia : doctoral dissertationPatrícia Kaplánová, 2017, doktorska disertacija Ključne besede: political participation, citizen's engagement, social identity, European Union, mixed method, political institutionalism, structural equation modeling, doctoral dissertation, politična participacija, angažiranost državljanov, družbena identiteta, Evropska unija, strukturne enačbe, modeliranje, politični institucionalizem, mešana metoda, disertacije
Objavljeno v ReVIS: 22.07.2021; Ogledov: 3115; Prenosov: 62
Celotno besedilo (2,95 MB) |
