This article analyses the challenge of collecting heritage present-day global protest movements, which are shaped and influenced by digital practices. In focus analysis mass-street demonstrations took place in cities all over Poland 2020 2021 to denounce ruling Constitutional Tribunal imposing a near-total ban on abortion (the “women’s rebellion”). Considered as largest social protests since fa...

The research reported herein was pursuant to a grant from the U.S. Social Security Administration (SSA), funded as part of the Retirement Research Consortium (RRC). The findings and conclusions expressed are solely those of the author and do not represent the views of SSA, any agency of the federal government, the University of Michigan, or the Center for Retirement Research at Boston College.

We present CCD BV I photometry of 85 variable stars from the field of the globular cluster NGC 6934. The photometry was obtained with the image subtraction package ISIS. 35 variables are new identifications: 24 RRab stars, 5 RRc stars, 2 eclipsing binaries of W UMa-type, one SX Phe star, and 3 variables of other types. Both detected contact binaries are foreground stars. The SX Phe variable bel...

X-rays from planetary nebulae (PNs) are believed to originate from a shock driven into the fast stellarwind (v ∼ 1000 km s−1) as it collides with an earlier circumstellar slow wind (v ∼ 10 km s−1). In theory, the shocked fast wind (hot bubble) and the ambient cold nebula can remain separated by magnetic fields along a surface referred to as the contact discontinuity (CD) that inhibits diffusion...

Laser irradiation parameters, especially the laser fluence and the number of pulses are very important factors affecting microstructures formation and improvement of the surface characteristics in different medical, electronic and the other industrial applications. Information about the fluence domain and the number of pulses for the formation of the structures is very important and determines ...