Starbase-Atlantis, a School Without Walls: A Comparative Study of an Innovative Science Program for At-Risk Urban Elementary Students

1998 ◽  
Vol 3 (3) ◽  
pp. 223-235 ◽  
Author(s):  
Marquay L. Lee-Pearce ◽  
Travis S. Plowman ◽  
Donna Touchstone
Author(s):  
Friederike Voßkamp
Keyword(s):  
At Risk ◽  

AbstractPastel paintings and drawings are particularly fragile due to the friable nature of this medium. At risk of severe mechanical, chemical and biological deterioration, pastels present a particular challenge for museum conservators. Protecting these sensitive artworks from damage during display, storage, manipulation or transportation is therefore a priority for every museum and other institution owning pastels. This paper provides an overview of different approaches to the preservation of pastels as practiced by ten museums across France, Germany and Austria. The selected museums each house an important pastel collection and agreed to respond to a survey about the conservation methods used in caring for these collections. The paper addresses the three main categories of the survey: display, storage and transportation of pastels. The first section includes a particular focus on the mounting and framing techniques used in the different museums.


1988 ◽  
Vol 74 (2) ◽  
pp. 86-94
Author(s):  
P. I. Raffaelli

AbstractSubmariners are exposed to a number of environmental, dietary and behavioural factors thought to be associated with urolithiasis. A comparative study of the incidence rate in submariners and non-submariners over a seven year period was carried out.A total of 267 cases of uroli thias is resulting in illness of 48 hours or greater duration were recorded during the years 1979 to 1985 of which 251 were available for study. Thirty four were identified as submariners and 217 as non-submariners (94% successfully identified). The total person years at risk for the two groups were 45, 171 and 311, 619 respectively. The crude incidence rates, indirectly standardised incidence ratio, the indirectly standardised incidence rates and the relative risk were calculated. Although each respective rate was greater for submariners than that for non-submariners the differences were not statistically significant. It is concluded that this study has failed to identify an increased relative risk for submariners to develop symptomatic urolithiasis.


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