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Collective global leadership requires team members to attempt to influence as well as accept influence from each other across multiple cultural, linguistic, and national boundaries, which is affected by the extent to which team members perceive the team as being safe for interpersonal risk-taking or the level of psychological safety in the team. The higher levels of collective leadership can, in turn, enhance the perceived psychological safety, and thereby create more positive outcomes for the team. This reciprocal relationship may be influenced by changes in team dynamics across the different stages of a team lifecycle. Using an inductive longitudinal study of 76 teams for nine months, we uncover the time-variant mutually reinforcing relationship between collective global leadership and team psychological safety. Our results show that the strength of this reciprocal relationship varies such that it is absent in the initial stage, becomes prominent in the middle stage, and then remains present, yet somewhat weakened, in the final stage of the team lifecycle. Our results also show that the initial collective leadership patterns in the team positively affect final leadership patterns, and this relationship is mediated by the team’s psychological safety in the middle stage of the team lifecycle. We discuss implications of this study on the theory and practice of global leadership and multinational teams.

For a state like Uttarakhand, which is located in the seismically active Himalayan region and in the vicinity of plate boundaries, estimation of seismic hazards and the preparation of a zoning map are an urgent necessity. This paper aims to focus on this hazard.

In total, 32 potential seismo‐tectonic source zones were identified in a very wide area in and around the state, on the basis of seismicity and tectonics, and the longer ones were segmented. The maximum magnitude that each seismo‐tectonic source zone can support was then estimated. The seismic hazard due to each seismo‐tectonic source zone was assessed at 180 sites, in terms of peak ground acceleration (PGA).

The maximum PGA at each site varied between 0.06g and 0.50g. The seismic hazard was highest around the main central thrust and the main boundary thrust, and five other thrusts between these two thrusts. This assessment was adapted to make a seismic zoning map of Uttarakhand, with five distinct zones.

If seismo‐tectonic source zones from the contiguous regions of Nepal and Tibet were included as part of this assessment, then a higher hazard would be expected in Uttarakhand.

Threat perceptions of a potential earthquake disaster can be assessed in this zoning map. Disaster mitigation strategies will vary geographically, with priorities defined by the zoning map presented here. The methodology evolved has the potential to be extended to other vulnerable states in the Himalayan arc.

The seismic hazard assessed has been adapted to formulate a seismic zoning map of Uttarakhand.

This paper aims to improve some properties of poly (methyl methacrylate) by copolymerization with butyl acrylate (BA) monomer along with the incorporation of the stable and economical synthesized silicone-containing monomer hexamethyldisilazanomethacryloxyphenyl ketone (HDMK) into the copolymer matrix.

For this target solution copolymerization of methyl methacrylate (MMA), BA and HDMK were carried out using a 250 mL four-necked round-bottom flask. Before solution polymerization start-up, the reaction vessel was first charged with 34.8 mL toluene and heated to 170 °C with stirring and reflux cooling. A monomer mixture of 25.86 g (260 mmol) MMA, 26.40 g (200 mmol) BA, 3.00 g (8.60 mmol) HDMK and 0.45 g (2.00 mmol) dibenzoyl peroxide was added continuously from the dropping funnel over a period of 4 h.

The HDMK was successfully synthesized and the water resistance of acrylic resins was improved because of the existence of HDMK.

The materials that were used in this research paper had a reasonably low cost. Also, the procedures for synthesis of monomers and polymers were extremely easy because there was no need for high pressure or temperature and no dangerous solvents were used.

The acrylic resin that contained HDMK was used to synthesis a white architectural paint for exterior coating. Examining the paint characteristics has shown acceptable washing and abrasion resistance, good brushing, excellent storage stability and great surface coating.

HDMK was synthesized for the first time.