Presents the results of a research study conducted with apprentices in order to examine the double hypothesis that vocational training incorporating work placement provides the opportunity to construct authentic situations out of the everyday practices of students, and that these situations allow students to improve their understanding of mathematical ...

A general approach to models of social approach is developed that leads to the construction of a variety of models, each appropriate to a particular class of situation; in this development, the approach is abandoned that constructs models of increasing ge...

Saccadic eye movements were registered under different ethanol concentrations (0 g/kg, 0.5 g/kg, 1.0 g/kg) using an infrared reflexion method. On the basis of photographic pictures conflict situations of a car driver were simulated. 12 young car drivers were exposed for 10 sec to four pictures, all under different ethanol concentrations. The eye movements ...

... REFLEXIONS AND DOWNWARD INFRARED FLUX ENHANCEMENT NEAR SMALL CUMULUS CLOUDS-NATURE, V232, NO5307, P182-185. ...

Having leaders visit the 'front lines' frequently critical for success. Local discoveries must be shared across the system. Many avenues available to hospitals wishing to adopt Lean. PMID:20632678

With the end of the millennium, several proposals or propositions have been made about politics, culture, and economics for the world society. Science cannot be isolated from this well-recognized globalization process. Information through the Internet allows the spread of scientific data and knowledge among professional and no professional users to be exchanged and non shared, with the possibility ...

The development of the percussive drilling machine has led to a situation where the drill steel itself has become a major noise source. A qualitative theory for the generation of this noise is presented. In this theory the longitudinal drilling pulse is partially converted to flexural motion by non-symmetric boundary conditions. The technique of stress optics combined with ...

Which solutions to child care are proposed to parents just after the diagnosis of Down's syndrome? The situation of Down's syndrome babies born in 1980-89 and abandoned at birth in Paris was studied. Semi-structured interviews were conducted with medical and social staffs of 13 maternity hospitals where 60% of these DS babies were ...

Certain disadvantages of the EOG (electrooculogram) in the measurement of gaze behaviour (for example lack of stability) can be overcome by using on-line computer identification of saccades and additional keyboard marking of relevant gazes by the experimenter. This reveals the advantages of EOG measurement for precise fixation durations of gazes on defined instruments, activation decrements and ...

The pseudo-stationary oblique shock wave reflexion by a wedge was numerically investigated by the direct Monte-Carlo simulation technique. In the numerical study the real gas flow is simulated at the molecular level by using a large number of model partic...

Twenty continuous seismic reflexion profiles have been made across the main trough of the Red Sea north of 17th degree N latitude. The main trough is characterized by mildly deformed sediment layers along the margins with highly disturbed materials in the...

The Illinois Abandoned Mined Lands Reclamation Council (AMLRC), created in 1975, is responsible for the abatement of hazardous and environmental problems associated with pre-law abandoned coal mines throughout the State. The availability of federal funds for reclamation, through passage of the Surface Mining Control and Reclamation Act of 1977 (SMCRA), ...

... thickness is a function of the diffractive index of water and oil and remains ... also into account the specular reflexion on the slick surface, as well ...

Even if most French mines are definitively closed, potential risks remain above the abandoned sites. In addition to surface instability, some mining sites may be affected by dangerous gas emissions, flooding events, or environmental impacts. Those kinds of disorders strongly influence the land-use management of the concerned areas. The present article presents the French ...

Throughout the United States, there is an accelerating abandonment of redundant and/or unprofitable light-density railroad lines. This abandonment can be economically harmful to both the shippers and the communities that were previously served. Although greater dependence upon truck transportation is a viable alternative in many cases, other ...

The railroad industry will have a very critical role in the eventual shipping of commercial spent fuel and defense high-level waste as provided under the Nuclear Waste Policy Act of 1982 and the 1987 amendments. The transport of spent fuel is expected to be accomplished by rail from 19 of the South`s 27 reactor sites to the proposed Yucca Mountain repository or possible monitored retrievable ...

After the Donnan osmotic potential derived theory of corneal stromal swelling was suggested (Hodson, 1971) it later was proposed, and verified experimentally, (Elliott et al., 1980) that the theory could be applied even in situations where there were no bounding cellular membranes attached to the corneal stroma. This was a paradox. The central problem with swelling in the ...

Using a Mueller matrix polarimeter based on liquid crystal cells [1] and the forward polar decomposition [2], we study the evolution of the birefringence property induced by an increasing compression of a Plexiglas sample. We measure the 2D distribution of the relative retardation ?, the azimuth angle ? and the ellipticity angle ? of the sample. A noticeable advantage of such method is the ...

Unobtrusive detection of concealed weapons on persons or in abandoned bags would provide law enforcement a powerful tool to focus resources and increase traffic throughput in high-risk situations. Under a National Institute of Justice, Office of Science a...