On a conjecture by Sylwia Cichacz and Tomasz Hinc, and a related problem

A r-magic rectangle set MRS Gamma(a, b; c) is a collection of c arrays of size a x b whose entries are the elements of an abelian group r of order abc, each one appearing once and in a unique array in such a way that the sum of the entries of each row is equal to a constant omega is an element of r and the sum of the entries of each column is equal to a constant delta is an element of r. In this paper we provide new evidences for the validity of a conjecture proposed by Sylwia Cichacz and Tom...

Ricordo di un Maestro

A Portable and Low‐Cost Single Board Computer‐Based Spectrophotometric Platform for Optical Analysis in the UV and Visible Range

The growing ability of high-performance consumer electronics is fostering innovation in prototyping and research. Although the Raspberry Pi single-board computer (SBC) is widely used across various fields, including diagnostics, applications involving UV-based reading remain underexplored. In this study, a simple, low-cost (less than 100 euros), and portable device for UV-vis measurements based on Raspberry Pi is presented. The system integrates the AS7341 multi-channel multispectral digital ...

Respiratory long COVID in aged hamsters features impaired lung function post-exercise with bronchiolization and fibrosis

Long-term consequences of SARS-CoV-2 infection affect millions of people and strain public health systems. The underlying pathomechanisms remain unclear, necessitating further research in appropriate animal models. This study aimed to characterize the trajectory of lung regeneration over 112 days in the male hamster model by combining morphological, transcriptomic and functional readouts. We demonstrate that in the acute phase, SARS-CoV-2 Delta-infected, male, aged hamsters show a severe impa...