scholarly journals Work in Progress: Project and Design-Based Introductory Engineering Course using Arduino Kits

2020 ◽  
Author(s):  
Demetris Geddis ◽  
Brian Aufderheide ◽  
Herman Colquhoun
Keyword(s):  
Work In Progress ◽  
Introductory Engineering Course

Meridional Circulation, Turbulence, and Diffusion Processes in Stars

1976 ◽  
Vol 32 ◽  
pp. 109-116 ◽  
Author(s):  
S. Vauclair
Keyword(s):  
Convection Zone ◽  
Diffusion Processes ◽  
Meridional Circulation ◽  
Diffusion Time ◽  
Work In Progress ◽  
First Results ◽  
Stellar Envelopes ◽  
And Diffusion ◽  
Turbulence And Diffusion ◽  
Hr Diagram

This paper gives the first results of a work in progress, in collaboration with G. Michaud and G. Vauclair. It is a first attempt to compute the effects of meridional circulation and turbulence on diffusion processes in stellar envelopes. Computations have been made for a 2 Mʘstar, which lies in the Am - δ Scuti region of the HR diagram.Let us recall that in Am stars diffusion cannot occur between the two outer convection zones, contrary to what was assumed by Watson (1970, 1971) and Smith (1971), since they are linked by overshooting (Latour, 1972; Toomre et al., 1975). But diffusion may occur at the bottom of the second convection zone. According to Vauclair et al. (1974), the second convection zone, due to He II ionization, disappears after a time equal to the helium diffusion time, and then diffusion may happen at the bottom of the first convection zone, so that the arguments by Watson and Smith are preserved.

iPLEDGE Remains A Work in Progress

2007 ◽  
Vol 38 (3) ◽  
pp. 1-92
Author(s):  
CHRISTINE KILGORE
Keyword(s):  
Work In Progress

Accutane Program Remains a Work in Progress

2007 ◽  
Vol 40 (7) ◽  
pp. 16-17
Author(s):  
CHRISTINE KILGORE
Keyword(s):  
Work In Progress
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