The Mountainair Lithic Scatters: Settlement Patterns and Significance Evaluation of Low Density Surface Sites

1979 ◽  
Vol 6 (4) ◽  
pp. 463 ◽  
Author(s):  
Joseph A. Tainter
2013 ◽  
Vol 8 (1) ◽  
pp. 493 ◽  
Author(s):  
Hongfeng Duan ◽  
Haiping He ◽  
Luwei Sun ◽  
Shiyan Song ◽  
Zhizhen Ye

2006 ◽  
Vol 274 (1608) ◽  
pp. 383-390 ◽  
Author(s):  
J Cote ◽  
J Clobert

Animal personalities are common across taxa and have important evolutionary and ecological implications. Such consistent individual differences correlate with important life-history traits such as dispersal. Indeed, some environmental conditions are supposed to determine dispersers with a specific personality. For example, an increased density should promote the departure of individuals with less social tolerance. Therefore, we hypothesized that dispersers from high-density populations should primarily be asocial individuals, whereas dispersers from low-density populations should be social individuals. In the common lizard ( Lacerta vivipara ), we measured attraction towards the odour of conspecifics on juveniles at birth as a metric of social tolerance. We then released these juveniles into populations of different densities and measured dispersal and settlement behaviours with regard to social tolerance. One year later, we again measured the social tolerance of surviving individuals. The social tolerance is constant across time and strongly reflects the individual's dispersal and settlement patterns with respect to population density. These results strongly suggest that social personalities exist and influence dispersal decisions. Further studies will help to elucidate the proximate and ultimate determinants of social personalities.


1992 ◽  
Vol 271 ◽  
Author(s):  
Douglas M. Smith ◽  
Ravindra Deshpande ◽  
C. Jeffrey Brinke

ABSTRACTLow density aerogels have numerous unique properties which suggest a number of applications such as ultra high efficiency thermal insulation. However, the commercial viability of these materials has been limited by the high costs associated with drying at high pressures (supercritical), low stability to water vapor, and low mechanical strength. Normally, critical point drying is employed to eliminate the surface tension and hence, the capillary pressure, of the pore fluid to essentially zero. However, we show that by employing a series of aging and surface derivatization steps, the capillary pressure and gel matrix strength may be controlled such that gel shrinkage is minimal during rapid drying at ambient pressure. The properties (density, surface area, pore size, SAXS) of aerogel monoliths prepared from base catalyzed silica gels using this technique, supercritical CO2 drying, and supercritical ethanol drying are compared. An additional advantage of this approach is that the final gels are hydrophobic.


Langmuir ◽  
2005 ◽  
Vol 21 (16) ◽  
pp. 7421-7426 ◽  
Author(s):  
Marek Kosmulski

2020 ◽  
Vol 59 ◽  
pp. 101890
Author(s):  
Gan Huang ◽  
Zhien Xian ◽  
Fei Tang ◽  
Linling Li ◽  
Li Zhang ◽  
...  
Keyword(s):  

2006 ◽  
Vol 90 (11) ◽  
pp. 4239-4247 ◽  
Author(s):  
Marco De Spirito ◽  
Roberto Brunelli ◽  
Giampiero Mei ◽  
Francesca R. Bertani ◽  
Gabriele Ciasca ◽  
...  

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