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Analytics, Volume 3, Issue 2 (June 2024) – 4 articles

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16 pages, 501 KiB  
Article
Improving the Giant-Armadillo Optimization Method
by Glykeria Kyrou, Vasileios Charilogis and Ioannis G. Tsoulos
Analytics 2024, 3(2), 225-240; https://doi.org/10.3390/analytics3020013 - 10 Jun 2024
Viewed by 155
Abstract
Global optimization is widely adopted presently in a variety of practical and scientific problems. In this context, a group of widely used techniques are evolutionary techniques. A relatively new evolutionary technique in this direction is that of Giant-Armadillo Optimization, which is based on [...] Read more.
Global optimization is widely adopted presently in a variety of practical and scientific problems. In this context, a group of widely used techniques are evolutionary techniques. A relatively new evolutionary technique in this direction is that of Giant-Armadillo Optimization, which is based on the hunting strategy of giant armadillos. In this paper, modifications to this technique are proposed, such as the periodic application of a local minimization method as well as the use of modern termination techniques based on statistical observations. The proposed modifications have been tested on a wide series of test functions available from the relevant literature and compared against other evolutionary methods. Full article
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4 pages, 864 KiB  
Editorial
Beyond the ROC Curve: The IMCP Curve
by Jesus S. Aguilar-Ruiz
Analytics 2024, 3(2), 221-224; https://doi.org/10.3390/analytics3020012 - 27 May 2024
Viewed by 261
Abstract
The ROC curve [...] Full article
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27 pages, 1190 KiB  
Article
Interconnected Markets: Unveiling Volatility Spillovers in Commodities and Energy Markets through BEKK-GARCH Modelling
by Tetiana Paientko and Stanley Amakude
Analytics 2024, 3(2), 194-220; https://doi.org/10.3390/analytics3020011 - 16 Apr 2024
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Abstract
Food commodities and energy bills have experienced rapid undulating movements and hikes globally in recent times. This spurred this study to examine the possibility that the shocks that arise from fluctuations of one market spill over to the other and to determine how [...] Read more.
Food commodities and energy bills have experienced rapid undulating movements and hikes globally in recent times. This spurred this study to examine the possibility that the shocks that arise from fluctuations of one market spill over to the other and to determine how time-varying the spillovers were across a time. Data were daily frequency (prices of grains and energy products) from 1 July 2019 to 31 December 2022, as quoted in markets. The choice of the period was to capture the COVID pandemic and the Russian–Ukrainian war as events that could impact volatility. The returns were duly calculated using spreadsheets and subjected to ADF stationarity, co-integration, and the full BEKK-GARCH estimation. The results revealed a prolonged association between returns in the energy markets and food commodity market returns. Both markets were found to have volatility persistence individually, and time-varying bidirectional transmission of volatility across the markets was found. No lagged-effects spillover was found from one market to the other. The findings confirm that shocks that emanate from fluctuations in energy markets are impactful on the volatility of prices in food commodity markets and vice versa, but this impact occurs immediately after the shocks arise or on the same day such variation occurs. Full article
(This article belongs to the Special Issue Business Analytics and Applications)
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16 pages, 984 KiB  
Article
Learner Engagement and Demographic Influences in Brazilian Massive Open Online Courses: Aprenda Mais Platform Case Study
by Júlia Marques Carvalho da Silva, Gabriela Hahn Pedroso, Augusto Basso Veber and Úrsula Gomes Rosa Maruyama
Analytics 2024, 3(2), 178-193; https://doi.org/10.3390/analytics3020010 - 3 Apr 2024
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Abstract
This paper explores the dynamics of student engagement and demographic influences in Massive Open Online Courses (MOOCs). The study analyzes multiple facets of Brazilian MOOC participation, including re-enrollment patterns, course completion rates, and the impact of demographic characteristics on learning outcomes. Using survey [...] Read more.
This paper explores the dynamics of student engagement and demographic influences in Massive Open Online Courses (MOOCs). The study analyzes multiple facets of Brazilian MOOC participation, including re-enrollment patterns, course completion rates, and the impact of demographic characteristics on learning outcomes. Using survey data and statistical analyses from the public Aprenda Mais Platform, this study reveals that MOOC learners exhibit a strong tendency toward continuous learning, with a majority re-enrolling in subsequent courses within a short timeframe. The average completion rate across courses is around 42.14%, with learners maintaining consistent academic performance. Demographic factors, notably, race/color and disability, are found to influence enrollment and completion rates, underscoring the importance of inclusive educational practices. Geographical location impacts students’ decision to enroll in and complete courses, highlighting the necessity for region-specific educational strategies. The research concludes that a diverse array of factors, including content interest, personal motivation, and demographic attributes, shape student engagement in MOOCs. These insights are vital for educators and course designers in creating effective, inclusive, and engaging online learning experiences. Full article
(This article belongs to the Special Issue New Insights in Learning Analytics)
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