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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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  The Descendants of the Svishtov National Revival Merchant Boro Nenovych in the Economic and Socio-Political Life of Bulgaria after the Liberation (Sketches on the Life Path of Georgi, Yani, And Gavril Nenovych)

  Following the Liberation of Bulgaria, a considerable number of individuals born in Svishtov - representing various generations and possessing both formal education and established expertise in commercial and public affairs - proved to be highly qualified personnel for the administrative requirements of the nascent state, in which they actively ... Following the Liberation of Bulgaria, a considerable number of individuals born in Svishtov - representing various generations and possessing both formal education and established expertise in commercial and public affairs - proved to be highly qualified personnel for the administrative requirements of the nascent state, in which they actively participated. Notable among these figures, who have been the subject of extensive scholarly research, are Grigor Nachovich, Dragan Tsankov, Nikola Suknarov, Nikolay Pavlovich, Dimitar Pavlovich, among others. This article examines the life trajectories of the lesser-known figures descended from Bora Nenovich, a prominent merchant from Svishtov active during the first half of the nineteenth century. Like their predecessor, these individuals contributed significantly to the economic, political, and social modernization of the country. This study synthesizes the existing historiographical data on Bora Nenovich and traces the respective careers of his descendants: Georgi B. Nenovich within the provincial and Sofia judicial systems; Yani B. Nenovich as a customs director in Varna and Rousse; and the multifaceted activities of the third brother, Gavril B. Nenovich, in Svishtov. Furthermore, this paper evaluates the outcomes of their professional endeavors and their institutional competencies. The author concludes that Gavril B. Nenovich fully realized his potential as a merchant, political leader, and public figure within his hometown, demonstrating no ambition to relocate to the capital despite possessing the means to do so. Ultimately, the professional achievements of the three brothers serve as a poignant case study of duty fulfilled toward both family and nation.

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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.