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1.
Patterns discovery in Slovenian public spending : a data-driven approach to corruption detection
Jelena Joksimović, 2023, doktorska disertacija

Opis: Corruption is a pervasive societal issue, entailing the misuse of public authority for personal benefits. Traditionally, corruption was estimated via perception surveys, which rely on probing the individuals about their views on corruption rather than directly measuring it. Such assessments encounter challenges in accurately capturing corruption and often diverge from actual corruption levels. Recent advancements in data collection, spurred by calls for transparency in public institutions and fueled by enhanced computational and storage capabilities, opened unprecedented opportunities for a far more precise analysis of corruptive processes. By quantitatively analyzing concrete datasets, such as transactions between public sector and private companies, contractual documents, public procurement records, bid outcomes, and healthcare product prices, novel avenues emerged for both addressing and predicting corruption. These scientific endeavors aim to discover the best policies to mitigate corruption and rebuild trust in public institutions. This doctoral dissertation pioneers this novel approach, forging a collaborative partnership with the Commission for the Prevention of Corruption in Slovenia (CPC). Harnessing state-of-the-art data mining, statistical analysis, and machine learning, we analyze a large CPC’s datasets detailing 17 years of public spending on private companies and reported receiving of gifts to public officials. We uncover an array of findings along three research directions: 1. We reveal the presence of self-organizing principles that govern Slovenian public expenditure. Such mechanisms are usually observed in more orderly (e.g. physical) systems and come across as surprising in this context, where interactions are dominated by human factors. 2. We construct an interactive framework tailored for CPC's use. It enables quick identification of suspicious private companies whose revenues from public sources exhibit visible disparities that correlate with changes of the government. 3. Finally, employing natural language processing, we uncover how seemingly innocent ceremonial gifts can foster favoritism and enable misuse of public positions for personal gains. We illustrate the disparities between the laws regulating gift reporting and the actual practices. In conclusion, this research contributed: (i) new computational methods for data-driven analysis of corruption, and (ii) better understanding of societal processes that govern public spending in Slovenia. Our work delivers valuable recommendations to governmental, public, and administrative bodies. We hope these insights will bolster the use of transparent public data as the key tool in the fight against corruption.
Ključne besede: corruption, public spending, gift reporting, transparency, data mining, time series, unsupervised learning
Objavljeno v ReVIS: 17.02.2025; Ogledov: 508; Prenosov: 19
.pdf Celotno besedilo (6,92 MB)

2.
Student data mining solution - knowledge management system related to higher education institutions
Srečko Natek, Moti Zwilling, 2014, izvirni znanstveni članek

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: 9054; Prenosov: 329  (1 glas)
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