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The copyright fosters increase of both informational and economical inequality. The Sci-Hub project supports Open Access movement in science.

Research should be published in open access, i. The Open Access is a new and advanced form of scientific communication, which is going to replace outdated subscription models. We stand against unfair gain that publishers collect by creating limits to knowledge distribution. A research paper is a special publication written by scientists to be read by other researchers.

Papers are primary sources neccessary for research — for example, they contain detailed description of new results and experiments. At this time the widest possible distribution of research papers, as well as of other scientific or educational sources, is artificially restricted by copyright laws. Such laws effectively slow down the development of science in human society.

The Sci-Hub project, running from 5th September , is challenging the status quo. At the moment, Sci-Hub provides access to hundreds of thousands research papers every day , effectively bypassing any paywalls and restrictions.

If it were not for Sci-Hub — I wouldn't be able to do my thesis in Materials Science research related to the structure formation in aluminum alloys Alexander T. Hard relative intensities seem needed to augment bone density, but this may reflect an associated increase in volume of activity. Hard relative intensities of exercise induce a transient immunosuppression.

The optimal intensity of effort, relative or absolute, for protection against various types of cancer remains unresolved. Acute effects of exercise on mood state also require further study; long-term benefits seem associated with a moderate rather than a hard relative intensity of effort. Conclusions: The importance of relative versus absolute intensity of effort depends on the desired health outcome, and many issues remain to be resolved.

Progress will depend on more precise epidemiological methods of assessing energy expenditures and studies that equate total energy expenditures between differing relative intensities. There is a need to focus on gains in quality-adjusted life expectancy.

Abstract Purpose: To examine the importance of relative versus absolute intensities of physical activity in the context of population health.