scholarly journals Experimental test of H− volume production process in a hydrogen discharge

1994 ◽  
Vol 65 (4) ◽  
pp. 1210-1212 ◽  
Author(s):  
Osamu Fukumasa ◽  
Toshio Iwasaki ◽  
Hiroshi Naitou ◽  
Satoshi Sakiyama
Keyword(s):  
Production Process ◽  
Experimental Test ◽  
Hydrogen Discharge ◽  
Volume Production

Bifacial Cores and Flake Production Efficiency: An Experimental Test of Technological Assumptions

2007 ◽  
Vol 72 (2) ◽  
pp. 334-348 ◽  
Author(s):  
Mary M. Prasciunas
Keyword(s):  
Production Process ◽  
Experimental Test ◽  
Production Efficiency ◽  
Cutting Edge ◽  
Cutting Efficiency ◽  
Mobile Populations ◽  
Core Technology ◽  
Size Threshold

Many researchers assume that the greater flake tool production efficiency of bifacial versus amorphous cores helps explain the prevalence of bifacial core technology among mobile populations. This paper describes experiments that test whether bifacial cores are more efficient carriers of flake cutting edge than amorphous cores. The first experiment established a size threshold of flake cutting efficiency. The second experiment reduced ten bifacial and ten amorphous cores to exhaustion and calculated the amount of usable and total flake edge produced by each core type, excluding flakes beneath the size threshold. Results indicate that bifacial cores are not significantly more efficient producers of usable or total flake edge than amorphous cores. Bifaces do produce flakes with significantly higher edge-to-weight ratios than do amorphous cores, but more of the weight of bifacial cores is lost to waste during the flake production process. Flake production efficiency therefore does not explain the use of bifacial cores among mobile populations.

Low-Pressure Small-Radius Hydrogen Discharge as a Volume-Production Based Source of Negative Ions

2011 ◽  
Author(s):  
Tsvetelina V. Paunska ◽  
Antonia P. Shivarova ◽  
Khristo Ts. Tarnev ◽  
Yasuhiko Takeiri ◽  
Katsuyoshi Tsumori
Keyword(s):  
Negative Ions ◽  
Low Pressure ◽  
Small Radius ◽  
Hydrogen Discharge ◽  
Volume Production

The impact of expectations and satisfaction on the initiation and maintenance of smoking cessation: An experimental test.

2008 ◽  
Vol 27 (3, Suppl) ◽  
pp. S197-S206 ◽  
Author(s):  
Andrew W. Hertel ◽  
Emily A. Finch ◽  
Kristina M. Kelly ◽  
Christie King ◽  
Harry Lando ◽  
...  
Keyword(s):  
Smoking Cessation ◽  
Experimental Test ◽  
The Impact
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