1. Using data mining to improve decision-making : case study of a recommendation system developmentHyrmet Mydyti, Arbana Kadriu, Mirjana Pejić Bach, 2023, original scientific article Abstract: Background and purpose: This study aims to provide a practical perspective on how data mining techniques are used in the home appliance after-sales services. Study investigates on how can a recommendation system help a customer service company that plans to use data mining to improve decision making during its digital transformation process. In addition, study provides a detailed outline on the process for developing and analyzing platforms to improve data analytics for such companies. Methodology: Case study approach is used for evaluating the usability of recommendation systems based on data mining approach in the context of home appliance after-sales services. We selected the latest platforms based on their relevance to the recommender system and their applicability to the functionality of the data mining system as trends in the system design. Results: Evaluation of the impact on decision making shows how the application of data mining techniques in organizations can increase efficiency. Evaluation of the time taken to resolve the complaint, as a key attribute of service quality that affects customer satisfaction, and the positive results achieved by the recommendation system are presented. Conclusion: This paper increases the understanding of the benefits of the data mining approach in the context of recommender systems. The benefits of data mining, an important component of advanced analytics, lead to an increase in business productivity through predictive analytics. For future research, other attributes or factors useful for the recommender systems can be considered to improve the quality of the results. Acknowledgement: The author Hyrmet Mydyti’s PhD thesis has been extended in this paper.
Keywords: digital transformation, data mining, decision tree algorithm, decision-making, home appliances after-sales services
Published in DKUM: 08.10.2025; Views: 0; Downloads: 3
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2. A novel framework for unification of association rule miningRahul Sharma, Minakshi Kaushik, Sijo Arakkal Peious, Alexandre Bazin, Syed Attique Shah, Iztok Fister, Sadok Ben Yahia, Dirk Draheim, 2022, original scientific article Abstract: Statistical reasoning was one of the earliest methods to draw insights from data. However, over the last three decades, association rule mining and online analytical processing have gained massive ground in practice and theory. Logically, both association rule mining and online analytical processing have some common objectives, but they have been introduced with their own set of mathematical formalizations and have developed their specific terminologies. Therefore, it is difficult to reuse results from one domain in another. Furthermore, it is not easy to unlock the potential of statistical results in their application scenarios. The target of this paper is to bridge the artificial gaps between association rule mining, online analytical processing and statistical reasoning. We first provide an elaboration of the semantic correspondences between their foundations, i.e., itemset apparatus, relational algebra and probability theory. Subsequently, we propose a novel framework for the unification of association rule mining, online analytical processing and statistical reasoning. Additionally, an instance of the proposed framework is developed by implementing a sample decision support tool. The tool is compared with a state-of-the-art decision support tool and evaluated by a series of experiments using two real data sets and one synthetic data set. The results of the tool validate the framework for the unified usage of association rule mining, online analytical processing, and statistical reasoning. The tool clarifies in how far the operations of association rule mining and online analytical processing can complement each other in understanding data, data visualization and decision making.
Keywords: association rule mining, data mining, online analytical processing, statistical reasoning
Published in DKUM: 02.10.2025; Views: 0; Downloads: 5
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3. Synergy of blockchain technology and data mining techniques for anomaly detectionAida Kamišalić Latifić, Renata Kovačević, Iztok Fister, 2021, review article Abstract: Blockchain and Data Mining are not simply buzzwords, but rather concepts that are playing
an important role in the modern Information Technology (IT) revolution. Blockchain has recently
been popularized by the rise of cryptocurrencies, while data mining has already been present in IT
for many decades. Data stored in a blockchain can also be considered to be big data, whereas data
mining methods can be applied to extract knowledge hidden in the blockchain. In a nutshell, this
paper presents the interplay of these two research areas. In this paper, we surveyed approaches for
the data mining of blockchain data, yet show several real-world applications. Special attention was
paid to anomaly detection and fraud detection, which were identified as the most prolific applications
of applying data mining methods on blockchain data. The paper concludes with challenges for future
investigations of this research area.
Keywords: anomaly detection, blockchain, distributed ledger, data mining, machine learning
Published in DKUM: 16.06.2025; Views: 0; Downloads: 6
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4. The OpenScience Slovenia metadata datasetMladen Borovič, Marko Ferme, Janez Brezovnik, Sandi Majninger, Albin Bregant, Goran Hrovat, Milan Ojsteršek, 2020, other scientific articles Abstract: The OpenScience Slovenia metadata dataset contains metadata entries for Slovenian public domain academic documents which include undergraduate and postgraduate theses, research and professional articles, along with other academic document types. The data within the dataset was collected as a part of the establishment of the Slovenian Open-Access Infrastructure which defined a unified document collection process and cataloguing for universities in Slovenia within the infrastructure repositories. The data was collected from several already established but separate library systems in Slovenia and merged into a single metadata scheme using metadata deduplication and merging techniques. It consists of text and numerical fields, representing attributes that describe documents. These attributes include document titles, keywords, abstracts, typologies, authors, issue years and other identifiers such as URL and UDC. The potential of this dataset lies especially in text mining and text classification tasks and can also be used in development or benchmarking of content-based recommender systems on real-world data.
Keywords: metadata, real world data, text data, text mining, text identification, natural language processing
Published in DKUM: 22.05.2025; Views: 0; Downloads: 10
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5. Prepoznavanje rastlin in njihovih bolezni z mobilno aplikacijoRok Trunkelj, 2025, undergraduate thesis Abstract: Raziskava obravnava prepoznavanje izbranih rastlin in njihovih bolezni s pomočjo
mobilne aplikacije. Na kratko so predstavljena uporabljena orodja: Orange Data mining,
Android Studio, MS Visio, Figma, Flask, Nginx in Gunicorn. Arhitektura rešitve obsega
virtualno okolje v oblaku s strežniki za dostop do modelov za klasifikacijo rastlin in
njihovih bolezni in aplikacijo Android. Opisan je postopek izdelave modelov strojnega
učenja, ki so bili preneseni na strežnik. V nalogi so prikazani pomembni deli kode in
podana razlaga vseh aspektov delovanja aplikacije.
Keywords: umetna inteligenca, razvoj aplikacije, analiza podatkov, podatkovno
rudarjenje, Orange Data Mining.
Published in DKUM: 09.04.2025; Views: 0; Downloads: 19
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8. Abstracts of the 10th Student Computing Research Symposium (SCORES’24)2024, proceedings Abstract: The 2024 Student Computing Research Symposium (SCORES 2024), organized by the Faculty of Electrical Engineering and Computer Science at the University of Maribor (UM FERI) in collaboration with the University of Ljubljana and the University of Primorska, showcases innovative student research in computer science. This year’s symposium highlights advancements in fields such as artificial intelligence, data science, machine learning algorithms, computational problem-solving, and healthcare data analysis. The primary goal of SCORES 2024 is to provide a platform for students to present their research, fostering early engagement in academic inquiry. Beyond research presentations, the symposium seeks to create an environment where students from different institutions can meet, exchange ideas, and build lasting connections. It aims to cultivate friendships and future research collaborations among emerging scholars. Additionally, the conference offers an opportunity for students to interact with senior researchers from institutions beyond their own, promoting mentorship and broader academic networking.
Keywords: student conference, computer and information science, artificial intelligence, data science, data mining
Published in DKUM: 18.09.2024; Views: 0; Downloads: 38
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9. Rapid assessment of steel machinability through spark analysis and data-mining techniquesGoran Munđar, Miha Kovačič, Miran Brezočnik, Krzysztof Stępień, Uroš Župerl, 2024, original scientific article Abstract: The machinability of steel is a crucial factor in manufacturing, influencing tool life, cutting
forces, surface finish, and production costs. Traditional machinability assessments are labor-intensive
and costly. This study presents a novel methodology to rapidly determine steel machinability using
spark testing and convolutional neural networks (CNNs). We evaluated 45 steel samples, including
various low-alloy and high-alloy steels, with most samples being calcium steels known for their
superior machinability. Grinding experiments were conducted using a CNC machine with a ceramic
grinding wheel under controlled conditions to ensure a constant cutting force. Spark images captured
during grinding were analyzed using CNN models with the ResNet18 architecture to predict V15
values, which were measured using the standard ISO 3685 test. Our results demonstrate that the
created prediction models achieved a mean absolute percentage error (MAPE) of 12.88%. While
some samples exhibited high MAPE values, the method overall provided accurate machinability
predictions. Compared to the standard ISO test, which takes several hours to complete, our method is
significantly faster, taking only a few minutes. This study highlights the potential for a cost-effective
and time-efficient alternative testing method, thereby supporting improved manufacturing processes.
Keywords: steel machinability, spark testing, data mining, machine vision, convolutional neural networks
Published in DKUM: 12.09.2024; Views: 15; Downloads: 31
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