Aging is frequently associated with a decreased postural stability, essentially after 60 years, leading to an increased risk of falling. In this article we propose to highlight the influence of the aging of the neuromuscular system on postural stability when standing upright. To maintain balance while standing upright, human needs to control the activity of ankle muscles and particularly the pl...

Understanding the mechanisms that reduce the many degrees of freedom in the musculoskeletal system remains an outstanding challenge. Muscle synergies reduce the dimensionality and hence simplify the control problem. How this is achieved is not yet known. Here we use network theory to assess the coordination between multiple muscles and to elucidate the neural implementation of muscle synergies....

Les mammographies sont le moyen le plus répandu pour la détection du cancer du sein. Des études ont démontré qu’une lecture double des mammographies augmente la sensitivité du diagnostic jusqu’à 15% (Bird et al., 1992) et de plus, (Destounis et al., 2004), que les outils d’aide au diagnostic automatique du cancer du sein (ADACS) peuvent améliorer même les résultats d’une double lecture des mamm...

We report a combined experimental and simulation study of deformation-induced diffusion in compacted quasi-two-dimensional amorphous granular pillars, in which thermal fluctuations play a negligible role. The pillars, consisting of bidisperse cylindrical acetal plastic particles standing upright on a substrate, are deformed uniaxially and quasistatically by a rigid bar moving at a constant spee...

Using the example of Taking a Stand in Cyberspace , we art iculate i s sues confront ing school , community, and higher education groups as they create onl ine discuss ions geared to deepen the leve l of s tudent discourse about l i terature. Through a col laboration between the Vermont Center for the Book, the WEB Project , and six Vermont schools , students read and discussed three books whi ...

British biologists look worryingly at the developments on the issue of creationism and intelligent design in the US, where constant pressure from powerful conservative Christian groups seeks to continue to set a scientific alternative to evolution. There is wider support for evolutionary theory in the UK, but creationists are pushing their agenda there: lavish textbooks have been sent to school...

T h e quarterly ceilings were Imposed in the fo rm of an amendment to the Overtime Pay Act, au toorized by Senator Har ry P. Byrd, Democrat of Virginia, and William Langer, Republican of North Dakota. This ceiling expires on June 30, and i t Is con, sidered significant tha t no one in the executive branch of the government has supported its renewal. Prospects for the proposed base Day increased...

OBJECTIVE To equip medical practitioners with up-to-date scientific and medical information on the health effects of exposure to fungi in indoor air, clinical evaluation of these health problems, and possible preventive measures. QUALITY OF EVIDENCE MEDLINE was searched from 1985 to 2000 using the MeSH words mould (mold), fungus, indoor air, and health effects. Nearly all studies were case repo...

s of the United States (pp. 1–62). Washington, DC: U.S. Department of Commerce. United States Census Bureau. (2005–2007). American Community Survey. Retrieved from http://www.census.gov/acs/www/Products/users_guide/

If our friend turns to the doctor for guidance, he is told, in admirably clear language, that his sexual deviation is probably unalterable, even if he is desperate enough to submit to castration, and that marriage is merely a recipe for tragedy. There is an interesting survey of the relevant laws in some other countries. If he lives in the United States he will find a legal range from complete ...