Uroš Cvelbar

Abstract Currently valued at around $600 billion, the space economy is expected to reach $1.8 trillion by 2035, with vital terrestrial systems increasingly dependent on space infrastructure. Growth is largely driven by the rising deployment of small and medium satellites in low Earth orbit (LEO), yet most are single-use and quickly decommissioned after failure, contributing to orbital debris and challenging sustainability.

Abstract High entropy alloys (HEAs) represent a promising area in materials science, but systematic analysis of the extensive literature remains a challenge. In this study, we used Natural Language Processing (NLP) techniques to analyze 4,625 scientific articles from a restricted corpus representing publisher-accessible literature, successfully identifying and characterizing 12,427 of different high entropy alloys.

1 INTRODUCTION The efficient production of high-purity hydrogen is critical to establishing the hydrogen economy.1 Conventional hydrogen production methods, predominantly reliant on fossil fuels, yield hydrogen-containing mixtures. Byproducts such as CO2 are simultaneously generated during these processes, necessitating additional hydrogen purification steps.2-4 Using membranes to separate hydrogen from gas mixtures is not new.