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  Architectural Approaches and Technological Challenges in Developing Data Warehouses for Small and Medium-Sized Enterprises in Bulgaria

  This article explores the architectural approaches and technological challenges associated with developing data warehouses (DWH) tailored to the needs of small and medium-sized enterprises (SMEs) in Bulgaria. Based on empirical data from the National Statistical Institute (NSI) and Eurostat, the analysis reveals a significant digital ... This article explores the architectural approaches and technological challenges associated with developing data warehouses (DWH) tailored to the needs of small and medium-sized enterprises (SMEs) in Bulgaria. Based on empirical data from the National Statistical Institute (NSI) and Eurostat, the analysis reveals a significant digital transformation lag among Bulgarian enterprises. The study examines the evolution of data warehousing concepts, from the classical Kimball and Inmon methodologies to modern cloud-based solutions such as BigQuery, Snowflake, and AWS Redshift. Particular focus is placed on the specificities of the Bulgarian SME sector, identifying key barriers: shortage of qualified personnel (data analysts/engineers), limited financial resources, managerial psychological barriers, and regulatory requirements (GDPR). The research provides practical recommendations for Bulgarian entrepreneurs regarding the choice between on-premise and cloud solutions, emphasizing return on investment (ROI) and strategic steps for initiating business intelligence projects.

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  Microgrids as a Strategic Solution for Decentralization of New Smart Quarters

  This article examines the economic efficiency of implementing microgrids as a strategic tool for decentralizing new residential neighborhoods in smart cities. The reduction of operating costs and the increase in the degree of energy independence are proven. This was achieved through a simulation model for comparing the traditional electricity ... This article examines the economic efficiency of implementing microgrids as a strategic tool for decentralizing new residential neighborhoods in smart cities. The reduction of operating costs and the increase in the degree of energy independence are proven. This was achieved through a simulation model for comparing the traditional electricity connection with a decentralized photovoltaic installation with energy storage systems. Urban planners, municipal structures and construction developers are offered practical solutions for including these systems at an early stage of the spatial and conceptual design of the modern urban environment.

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  Analysis of Selected Macroeconomic Indicators for BRICS Countries Excluding China

  This study analyzes key macroeconomic indicators of the BRICS countries, excluding China, in the context of the economic challenges and global changes since 2008. Looking at the indicators for the period 2020–2024, the paper presents their rate of change and each country's contribution to the alliance. The analysis shows that the countries are ... This study analyzes key macroeconomic indicators of the BRICS countries, excluding China, in the context of the economic challenges and global changes since 2008. Looking at the indicators for the period 2020–2024, the paper presents their rate of change and each country's contribution to the alliance. The analysis shows that the countries are achieving significant economic growth, despite the differences in dynamics and the challenges they face. Brazil is demonstrating an improvement in its position in the world, India is increasing its purchasing power and attracting investment, Russia is facing the economic consequences of its invasion of Ukraine, and South Africa remains the weakest economy in the union, with its key role in it. The conclusion is that, despite their differences, each BRICS country is developing a sustainable economy, improving cooperation among themselves, and changing the existing economic and political system.