Bulletin of the Transilvania University of Brasov. Series I

Bulletin of the Transilvania University of Brasov. Series I - Engineering Sciences https://webbut.unitbv.ro/index.php/Series_I <h1 class="page_title">Aim</h1> The Journal aims to be a forum for the latest results in engineering research, promoting integrated, interdisciplinary approaches, focusing on sustainable energy and high-tech product development. The journal is open to research groups all over the world and mostly welcomes scientific papers from groups involving young researchers and Ph.D. students. The Journal welcomes contributions that meet the general criteria of relevance and scientific excellence. The Journal is indexed in EBSCO Publishing DataBase (<a href="http://webbut.unitbv.ro/public/site/documents/admin/a9h-subject.xls">http://www.ebscohost.com/titleLists/a9h-subject.xls</a>), from 2008, Crossref (<a href="https://search.crossref.org/?q=Bulletin+of+transilvaniaBulletin+of+the+Transilvania+University+of+Brasov.+Series+I+-+Engineering+Sciences&from_ui=yes" target="_blank" rel="noopener">https://search.crossref.org</a>), from January 2019, and is accredited by the Romanian National Council of Scientific Research (CNCS) in the <a href="https://uefiscdi.gov.ro/userfiles/file/IC6%202011/Reviste%20romanesti%20recunoscute%20de%20CNCSIS-%20categoria%20B_plus.pdf">category B+</a> of the scientific magazine. Senior-editor, Cristian BOLDISOR <a href="http://webbut.unitbv.ro/index.php/Series_I/about" target="_blank" rel="noopener">Read more</a> Transilvania University Press en-US Bulletin of the Transilvania University of Brasov. Series I - Engineering Sciences 2065-2119 Energy Performance Indicators for Drinking Water Pumping Stations https://webbut.unitbv.ro/index.php/Series_I/article/view/11284 In the current context of population growth, urbanization, and climate change, the efficient operation of urban water systems is essential. Pumps represent the main consumers of electrical energy and are extensively utilized in water extraction, treatment, and distribution processes. This paper conducts an analysis of energy efficiency in pumping stations, which constitute critical components of urban water supply infrastructure. Two case studies are developed in which the performance of pumping stations is assessed using performance indicators. The obtained results contribute to the establishment and implementation of new strategies for improving energy efficiency. V. Cojanu E. Helerea Copyright (c) 2025 Bulletin of the Transilvania University of Brasov. Series I - Engineering Sciences 2026-01-26 2026-01-26 1 10 10.31926/but.ens.2025.18.67.1.1 Enhancing Dermoscopy Segmentation Accuracy: An Algorithmic Approach for Automatic Hair Removal for Skin Cancer Detection https://webbut.unitbv.ro/index.php/Series_I/article/view/11285 This paper presents an automated approach for hair removal in dermoscopy images to enhance the accuracy of skin cancer detection and segmentation. Traditional dermoscopic segmentation often faces challenges due to the presence of hair, which can generate false positives and obscure critical features of the lesion. This paper proposes an algorithm that effectively identifies and removes hair from skin cancer images, enabling clearer visualization of the skin's surface. This method combines image processing techniques with image reconstruction models to distinguish between hair and skin tissue, ensuring minimal distortion of the underlying skin features. The numerical results demonstrate significant improvements in the performance of automated skin cancer detection systems, highlighting the potential of this approach for clinical applications in dermatology. Dana Elena Ilea Ghita Copyright (c) 2025 Bulletin of the Transilvania University of Brasov. Series I - Engineering Sciences 2026-01-26 2026-01-26 11 22 10.31926/but.ens.2025.18.67.1.2 Intelligent Access System Based on Digital Fingerprint Recognition https://webbut.unitbv.ro/index.php/Series_I/article/view/11286 This paper presents the design and implementation of an IoT-based biometric access control system that integrates ESP32, fingerprint recognition, and a web-based remote management platform. The system leverages FreeRTOS for efficient task scheduling and real-time processing, ensuring stable operation even during network disruptions. Experimental tests demonstrate a 98% fingerprint recognition accuracy, stable Wi-Fi connectivity, and low power consumption, confirming the system’s feasibility and scalability. This work contributes to biometric authentication research by integrating modern security techniques with embedded IoT systems, making it a viable solution for smart buildings and secure access environments. F.T. Teleki M.C. Carp Copyright (c) 2025 Bulletin of the Transilvania University of Brasov. Series I - Engineering Sciences https://creativecommons.org/licenses/by/4.0/ 2026-01-26 2026-01-26 23 30 10.31926/but.ens.2025.18.67.1.3