2014 We report on magnetic dynamic properties in the Ising spin glass Fe0.35Mg0.65Br2. The ac susceptibility curves have been deduced from direct susceptibility and Faraday rotation measurements over a wide frequency range extending from 100 kHz down to 0.05 Hz. The temperature dependence of the characteristic relaxation time cannot be fitted by either a power or an Arrhenius law over the whole...

If we were to start from scratch today to design a quality-controlled archive and distribution system for scientific and technical information, it could take a very different form from what has evolved in the past decade from pre-existing print infrastructure. Ultimately, we might expect some form of global knowledge network for research communications. Over the next decade, there are many tech...

Abstract Refreezing of meltwater in firn is a major component Greenland ice-sheet's mass budget, but situ observations are rare. Here, we compare the density and total ice layer thickness upper 15 m 19 new 27 previously published cores drilled at locations southwest (1850–2360 a.s.l.) between 1989 2019. At all sites, covaries with over time space. two sites earliest (1989 1998), bulk increased ...

Over 20 years ago, in 1989, The New York Times published a very similar article, also citing studies demonstrating the connection between exercise and lifespan. ( http://www.nytimes.com /1989/11/03/us/exercise-and-longevity-a-little-goes-a-long-way.html ) The study did not elaborate on what health aspects exercise improved, just that the mortality rate was 3 times higher in the least fit category.

Barrier islands (BIs) are the first line of defense against sea/wave actions in coastal areas, and assessing their stability is crucial context effective planning. Therefore, this study evaluates spatial–temporal shoreline changes BIs Pakistan over past three decades (1989–2018). Satellite data from Landsat missions used to delineate shorelines 19 Pakistan. After delineating satellite observati...