Iskanje po repozitoriju

A+ | A- | | SLO | ENG

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 However, in some cases the operation of aircraft may still be reliant on outdated technology that could be years or even decades old.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
Objavljeno v ReVIS: 15.03.2024; Ogledov: 377; Prenosov: 11
Celotno besedilo (13,29 MB)

Opis: This study focuses on the paternity suit which is one of the ways to establish the paternity between the natural child and his/her father. The aim of this study is to emphasize the importance of paternity suit and examine the reforms on paternity suit brought about by Turkish Civil Code, no. 4721. Within the scope of the study, the statements and opinions of the doctrine mentioned, the changes made in the legislation during the process were emphasized, comparisons were made with the Turkish Civil Code no. 743 and Supreme Court's decisions on the concerned portions were included. The paternity between the natural child and the father was subject to the same provisions as the relationship between the legitimate child and the father at this point after the regulations were made. Paternity suit, which is considered to be a retroactive constitutive lawsuit, aims to establish a paternity (lineage) relationship between the natural child and the father. The mother can claim material and immaterial compensation apart from or along with the paternity suit from the father or his successors. The plaintiff of the paternity suit is either the mother or the child; the defendant is the father or his successors if he is deceased. The suit is notified to the public prosecutor and the treasury, to the trustee if it is filed by the mother, to the mother if it is filed by the trustee. Those who are notified of the case, are allowed participation in the proceedings as a secondary intervening party or they can also remain indifferent. Paternity suit is filed in a one-year period of prescription as of the date of birth, at the Civil Court of First Instance located in the parties' residential area when the child is born if the parties reside in Turkey. Moreover, the law issued presumption of paternity in favour of the plaintiff. However; the plantiff may confute and rebut this presumption. In the cases where the presumption is nondemonstrable, either the mother or the child must directly prove the paternity of the plaintiff. The principle of ex officio examination is effective in paternity suit. Therefore, the judge freely appraises the demonstrations. The presumption of paternity, may be proven by cognisance, brief, definitive judgment and any kind of proof; however, it is impossible to tender an oath. Paternity, on the other hand, may be proven by expert examining. Experts determine paternity by full blood examination and similarity examination. DNA tests, a type of full blood examinations, are a much more reliable method for the determination of paternity compared to blood groups and similarity examinations. Thus, the determination of paternity through DNA tests is accurate. Paternity suit can be called off if the plaintiff withdraws the lawsuit. However; the lawsuit does not terminate when the defendant accepts the lawsuit and there is not a possibility of settlement of claim. In the event that the defendant's paternity is determined in the paternity suit, the child takes the mother's surname; earns the citizenship and heirship of the father. As a rule, the mother has the custody of the child. The mother and the father cover the maintenance and education expenses of the child. The mother and the father are obliged to help, respect and understand each other, which is required for the peace and integrity of the family. Whether or not it is possible to renew the adjudication is clear after the verdict was given, by taking into account the data obtained by the methods such as DNA tests and so on, against a verdict that was definitive by the end of the paternity suit in a period where these methods were not used.
Ključne besede: paternity suit, medical data, Turkish civil code, family law, civil law, ugotavljanje očetovstva, družinsko pravo, civilno pravo
Objavljeno v ReVIS: 19.03.2020; Ogledov: 2453; Prenosov: 117
Celotno besedilo (762,47 KB)

Opis: Higher education institutions (HEIs) are often curious whether students will be successful or not during their study. Before or during their courses the academic institutions try to estimate the percentage of successful students. But is it possible to predict the success rate of students enrolled in their courses? Are there any specific student characteristics, which can be associated with the student success rate? Is there any relevant student data available to HEIs on the basis of which they could predict the student success rate? The answers to the above research questions can generally be obtained using data mining tools. Unfortunately, data mining algorithms work best with large data sets, while student data, available to HEIs, related to courses are limited and falls into the category of small data sets. Thus, the study focuses on data mining for small student data sets and aims to answer the above research questions by comparing two different data mining tools. The conclusions of this study are very promising and will encourage HEIs to incorporate data mining tools as an important part of their higher education knowledge management systems.
Ključne besede: data mining, knowledge management system, student's success rate, data mining for small data set, higher education institutions, educational data mining
Objavljeno v ReVIS: 19.02.2016; Ogledov: 7950; Prenosov: 329  (1 glas)
Povezava na celotno besedilo
Gradivo ima več datotek! Več...