We present optical spectroscopic and UBV (RI)C photometric observations of Nova Cygni 2014 (V2659 Cyg) from its rebrightening to the nebular stage.After the first maximum, the nova underwent several irregular flare-like rebrightenings, with amplitudes up to two magnitudes, accompanied with Headlamps spectral changes.During the bright state, forbidd
The results of research on diagonal crack width in a single span RC beams were presented in the article.Eurocode Used Shoulder Pads 2 rules do not require the direct control of shear crack width.It is assumed, that reinforcement designed to carry the transverse force is also enough to limit the crack width.Experiments were led on beams grouped into
The power grid is experiencing a multi-fold transformation while the global climate evolves with record-breaking extreme temperatures during heat domes, polar vortices, and severe ice.Over the decades, these extreme temperature events have increased in frequency, duration, and intensity.The power grid infrastructure is geographically spread over th
The ubiquitin proteasome system (UPS), particularly its deubiquitinating enzymes (DUBs), play a key role in the replication cycle of coronaviruses.The SARS-CoV-2 papain-like protease (Plpro) is known to process the viral polyproteins to form the replicase transcriptase complex and to counteract the host viral response.Recently, it was shown that th
INTRODUCTION: Significant advances have been made in photovoltaic (PV) systems, resulting in the development of new Maximum Power Point Tracking (MPPT) methods.The output of PV systems is heavily influenced by the varying performance of solar-facing PV panels under different weather conditions.Partial shading (PS) conditions pose additional challen