Synergy of Diversity: Data, Modeling and Decisions
Synergy of Diversity: Data, Modeling and Decisions
Contributor(s): Stanisław Spodzieja (Editor)
Subject(s): Social Sciences, Education
Published by: Wydawnictwo Uniwersytetu Łódzkiego
Summary/Abstract: The publication presents the following studies:– Stress in Business and Fear of Failure versus Entrepreneurs’ Personal and Financial Resources,– Scalability and Stability of Ethereum Layer-2 Networks: A Comparative Analysis of Scroll, Linea, and Base Rollups,– A Stacked Meta Neural Network with Adaptive Nonlinear Decision Fusion for Cardiovascular Disease Prediction,– The Dialogical Nature of Iwona Chmielewska’s Picturebooks – Aesthetic and Pedagogical Context,– Various Representations of Geometric Objects in Spatial Relational and Spatial Object-Relational Databases Management Systems.
Series: Uniwersytet Łódzki
- E-ISBN-13: 978-83-8331-969-8
- Page Count: 76
- Publication Year: 2025
- Language: English
Stress in Business and Fear of Failure versus Entrepreneurs’ Personal and Financial Resources
Stress in Business and Fear of Failure versus Entrepreneurs’ Personal and Financial Resources
(Stress in Business and Fear of Failure versus Entrepreneurs’ Personal and Financial Resources)
- Author(s):Katarzyna Biegańska
- Language:English
- Subject(s):Psychology
- Page Range:7-21
- No. of Pages:15
- Summary/Abstract:The present research aims to elucidate the relationships between entrepreneurial stress, fear of failure, and both psychological and fnancial resources. The study sample comprised entrepreneurs who owned either newly established businesses (enterprises registered for up to 42 months) or more established ventures (those registered for more than 42 months). In total, 349 participants were surveyed, of whom 155 were classifed as new entrepreneurs and 194 as mature entrepreneurs. The following tools were used: The SES Self-Esteem Scale developed M. Rosenberg, Generalised Self-Efcacy Scale (GSES) developed Schwarz and Jerusalem; Perceived Stress Scale PSS-10 developed by Cohen, Kamarcka, Mermeinstein, own questionnaire for measuring fear of failure, fnancial and sociodemographic variables. The fndings of this study support the division of the entrepreneurial sample into two cohorts based on business experience (up to 42 months and over 42 months). Psychological resources—specifcally, hope for success (with particular emphasis on the volitional component), self-esteem, and perceived self-efcacy — demonstrate signifcant associations with experienced stress and fear of failure. The results indicate that these psychological resources function as determinants of psychological stress.
Scalability and Stability of Ethereum Layer-2 Networks: A Comparative Analysis of Scroll, Linea, and Base Rollups
Scalability and Stability of Ethereum Layer-2 Networks: A Comparative Analysis of Scroll, Linea, and Base Rollups
(Scalability and Stability of Ethereum Layer-2 Networks: A Comparative Analysis of Scroll, Linea, and Base Rollups)
- Author(s):Arkadiusz Iwanicki
- Language:English
- Subject(s):Education
- Page Range:23-30
- No. of Pages:8
- Summary/Abstract:The article presents an empirical comparison of three contemporary Layer-2 scaling solutions for the Ethereum blockchain: Scroll, Linea, and Base, representing zk-rollup and optimistic rollup architectures. The study aims to evaluate the transaction processing speed and stability of selected Layer-2 networks using real-time data collected from blockchain explorers (Blockscout, Lineascan, Basescan). The dataset comprises 45,000 transactions processed in October 2025 and aggregated at one-second resolution (1 Hz). Statistical analyses include ANOVA, Kruskal–Wallis, Levene, and Brown–Forsythe tests, as well as ADF and KPSS stationarity diagnostics, used to assess diferences in throughput and operational stability across the examined networks. The results indicate that the Base network achieves the highest mean throughput (≈ 102 TPS) and the lowest temporal volatility, whereas Linea and Scroll exhibit non-stationary, highly variable transaction dynamics driven by periodic batching. The fndings confrm the persistence of the scalability trilemma—where improvements in performance may come at the cost of higher centralization and operational dependency. This research contributes to the quantitative assessment of rollup efciency and provides a reference point for further empirical studies on blockchain scalability.
A Stacked Meta Neural Network with Adaptive Nonlinear Decision Fusion for Cardiovascular Disease Prediction
A Stacked Meta Neural Network with Adaptive Nonlinear Decision Fusion for Cardiovascular Disease Prediction
(A Stacked Meta Neural Network with Adaptive Nonlinear Decision Fusion for Cardiovascular Disease Prediction)
- Author(s):Marta Lipnicka, Szymon Kaźmierczak
- Language:English
- Subject(s):Education
- Page Range:31-39
- No. of Pages:9
- Summary/Abstract:Cardiovascular disease (CVD) remains a leading global cause of mortality, emphasizing the need for reliable early prediction systems. This study proposes a Stacked Meta Neural Network (SMNN) that integrates multiple machine learning classifers through nonlinear decision fusion. In the frst stage, six base models generate probabilistic outputs using a k-fold out-of-fold (OOF) strategy. These are then combined by a shallow Artifcial Neural Network (ANN) meta-learner to capture hidden nonlinear interactions. Experimental evaluation on a dataset of over 66,000 records achieved strong performance, with high recall and balanced ROCAUC, demonstrating the SMNN’s efectiveness as a robust and generalizable tool for CVD risk prediction.
The Dialogical Nature of Iwona Chmielewska’s Picturebooks – Aesthetic and Pedagogical Context
The Dialogical Nature of Iwona Chmielewska’s Picturebooks – Aesthetic and Pedagogical Context
(The Dialogical Nature of Iwona Chmielewska’s Picturebooks – Aesthetic and Pedagogical Context)
- Author(s):Joanna Stanisława Ludwiczak
- Language:English
- Subject(s):Education, Polish Literature
- Page Range:41-46
- No. of Pages:6
- Summary/Abstract:The present research aims to elucidate the relationships between entrepreneurial stress, fear of failure, and both psychological and fnancial resources. The study sample comprised entrepreneurs who owned either newly established businesses (enterprises registered for up to 42 months) or more established ventures (those registered for more than 42 months). In total, 349 participants were surveyed, of whom 155 were classifed as new entrepreneurs and 194 as mature entrepreneurs. The following tools were used: The SES Self-Esteem Scale developed M. Rosenberg, Generalised Self-Efcacy Scale (GSES) developed Schwarz and Jerusalem; Perceived Stress Scale PSS-10 developed by Cohen, Kamarcka, Mermeinstein, own questionnaire for measuring fear of failure, fnancial and sociodemographic variables. The fndings of this study support the division of the entrepreneurial sample into two cohorts based on business experience (up to 42 months and over 42 months). Psychological resources—specifcally, hope for success (with particular emphasis on the volitional component), self-esteem, and perceived self-efcacy — demonstrate signifcant associations with experienced stress and fear of failure. The results indicate that these psychological resources function as determinants of psychological stress.
Various Representations of Geometric Objects in Spatial Relational and Spatial Object-Relational Databases Management Systems
Various Representations of Geometric Objects in Spatial Relational and Spatial Object-Relational Databases Management Systems
(Various Representations of Geometric Objects in Spatial Relational and Spatial Object-Relational Databases Management Systems)
- Author(s):Aleksandra Stasiak
- Language:English
- Subject(s):Education, ICT Information and Communications Technologies
- Page Range:47-75
- No. of Pages:29
- Summary/Abstract:In this paper we look at various kinds of representations of geometric objects in spatial relational (or object-relational) database management systems. We confront it with Simple Feature Access and SQL/MM (Part:3) standards. We also try to fnd out some other representations of geometric objects that are used not only in traditional spatial database management systems but also in some NoSQL databases. We indicate functions and methods related to geometry representations such as WKT, WKB, GML, GeoJSON, GeoHash, KML, EWKT, EWKB, TWKB, HEXEWKB used in MySQL, Oracle XE and PostGIS/PostgreSQL. We illustrate this with examples, also showing some ideas for importing/exporting geometries between these database management systems.
