Afterword. The Puzzle of National Traditions, or the Art of Nut-Cracking

2012 ◽  
pp. 205-210
Keyword(s):  
Nut Cracking

scholarly journals Functional mastery of percussive technology in nut-cracking and stone-flaking actions: experimental comparison and implications for the evolution of the human brain

2012 ◽  
Vol 367 (1585) ◽  
pp. 59-74 ◽  
Author(s):  
Blandine Bril ◽  
Jeroen Smaers ◽  
James Steele ◽  
Robert Rein ◽  
Tetsushi Nonaka ◽  
...  
Keyword(s):  
Skill Acquisition ◽  
Tool Use ◽  
Cognitive Abilities ◽  
Brain Evolution ◽  
Experimental Comparison ◽  
Future Research ◽  
Research Areas ◽  
Nut Cracking ◽  
Percussive Technology ◽  
Recent Experimental Work

Various authors have suggested behavioural similarities between tool use in early hominins and chimpanzee nut cracking, where nut cracking might be interpreted as a precursor of more complex stone flaking. In this paper, we bring together and review two separate strands of research on chimpanzee and human tool use and cognitive abilities. Firstly, and in the greatest detail, we review our recent experimental work on behavioural organization and skill acquisition in nut-cracking and stone-knapping tasks, highlighting similarities and differences between the two tasks that may be informative for the interpretation of stone tools in the early archaeological record. Secondly, and more briefly, we outline a model of the comparative neuropsychology of primate tool use and discuss recent descriptive anatomical and statistical analyses of anthropoid primate brain evolution, focusing on cortico-cerebellar systems. By juxtaposing these two strands of research, we are able to identify unsolved problems that can usefully be addressed by future research in each of these two research areas.

Technical intelligence and culture: Nut cracking in humans and chimpanzees

2017 ◽  
Vol 163 (2) ◽  
pp. 339-355 ◽  
Author(s):  
Christophe Boesch ◽  
Daša Bombjaková ◽  
Adam Boyette ◽  
Amelia Meier
Keyword(s):  
Technical Intelligence ◽  
Nut Cracking

Prehistory in a nutshell: a Lapita-age nut-cracking stone from the Arawe Islands, Papua New Guinea

2013 ◽  
pp. n/a-n/a ◽  
Author(s):  
Carol Lentfer ◽  
Peter J. Matthews ◽  
Chris Gosden ◽  
Sue Lindsay ◽  
Jim Specht
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
Nut Cracking

Physical Properties of Upper Midwest U.S.-Grown Hybrid Hazelnuts

2019 ◽  
Vol 62 (5) ◽  
pp. 1087-1102
Author(s):  
David R. Bohnhoff ◽  
Kenneth Scott Lawson ◽  
Jason A. Fischbach
Keyword(s):  
Shell Thickness ◽  
Applied Load ◽  
Initial Crack ◽  
Rupture Force ◽  
Shell Mass ◽  
Moisture Contents ◽  
Line Parallel ◽  
Rupture Energy ◽  
Nut Cracking ◽  
Highly Correlated

Abstract. Nuts from F1 hybrid hazelnuts grown in Wisconsin were harvested and dried to eight different moisture contents. Nut dimensions and mass were recorded. Nuts were then subjected to uniaxial compression to determine total deformation required for rupture, rupture force, and rupture energy for each of the three major nut axes. Kernel dimensions, shell thickness, shell mass, and kernel mass of each nut were recorded after rupture. Hybrid hazelnuts and kernels were found to be smaller than European varieties. Nut geometry was found to change with nut size. When a nut is loaded, an initial crack forms along a longitudinal line parallel to the direction of applied load and then rapidly propagates until it has extended along two longitudinal lines (both parallel to the applied load), causing the shell to split into two pieces. Under lateral (Y-axis and Z-axis) loadings, the shell is split into nearly identical halves. Loading along the X-axis required the lowest rupture force, rupture energy, and rupture strain of all loading axes. Rupture force, rupture energy, and stiffness were shown to be highly correlated with moisture content. At lower moisture contents, shells fractured into more pieces. Keywords: Hazelnut, Nut cracking, Nut geometry, Nut rupture force, Shelling, Shell thickness.

scholarly journals Predicting cashew nut cracking using hertz theory of contact stress

2019 ◽  
Vol 18 (2) ◽  
pp. 157-167
Author(s):  
Joshua Sunday Ojolo ◽  
Babatunde Abdulkarim Eweina
Keyword(s):  
Contact Stress ◽  
Hertz Theory ◽  
Cashew Nut ◽  
Nut Cracking
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