Soil Compaction of Hardin Hall Green Space Social Trail on the University of Nebraska-Lincoln\u27s East Campus

Soil compaction is a common agricultural and urban landscape problem, particularly along cow paths and social trails, respectively. The social trail in the green space of Hardin Hall on the University of Nebraska- Lincoln East Campus has visual cues of soil compaction, due to the slow rate of water infiltration and lack of vegetation. Being the focus area of this study, a sampling grid was placed on the trail by measuring and sectioning it into equal sections. These sections were further divided into subsections of on-path and off-path for comparison. Soil structure, texture, bulk density, and water infiltration were analyzed to determine the severity of soil compaction occurring on this social trail. Both soil structure and soil texture were found to be the same when comparing on-path and off-path samples. Bulk density was found to be significantly ( p \u3c 0.001) higher for the on-path samples compared to off-path samples. Water infiltration rates were also significantly ( p = 0.002) slower for the on-path samples compared to off-path samples. These results indicate that, due to being the same on- and off-path, soil structure and texture can be excluded as a cause for the difference of bulk density and water infiltration rates. Significantly higher bulk densities and slower water infiltration indicate that soil compaction is occurring on the Hardin Hall social trail

L’évolution parallèle et son mécanisme

Piveteau Jean. L’évolution parallèle et son mécanisme. In: La Terre et La Vie, Revue d'Histoire naturelle, tome 6, n°1, 1936. pp. 30-36

La géographie dans l’enseignement primaire et l’idée d’exception nationale : le cas de la France et de la Suisse dans les deux premiers tiers du XIXe siècle

La thèse selon laquelle l’enseignement de la géographie à l’école primaire, dans les deux premiers tiers du XIXe siècle (avant, donc, 1870), a pu contribuer au développement de l’idée d’exception nationale, en France et en Suisse, ne va pas de soi. La géographie occupe alors très peu de place : embryonnaire à l’université ; à la portion congrue dans l’enseignement secondaire ; et de façon particulièrement simplifiée dans l’enseignement primaire (ce dernier nous retiendra seul ici). En second ..

The Neanderthal teeth from Marillac (Charente, Southwestern France): Morphology, comparisons and paleobiology

Few European sites have yielded human dental remains safely dated to the end of MIS 4/beginning of MIS 3. One of those sites is Marillac (Southwestern France), a collapsed karstic cave where archeological excavations (1967–1980) conducted by B. Vandermeersch unearthed numerous faunal and human remains, as well as a few Mousterian Quina tools. The Marillac sinkhole was occasionally used by humans to process the carcasses of different prey, but there is no evidence for a residential use of the site, nor have any hearths been found. Rare carnivore bones were also discovered, demonstrating that the sinkhole was seasonally used, not only by Neanderthals, but also by predators across several millennia. The lithostratigraphic units containing the human remains were dated to ∼60 kyr. The fossils consisted of numerous fragments of skulls and jaws, isolated teeth and several post-cranial bones, many of them with traces of perimortem manipulations. For those already published, their morphological characteristics and chronostratigraphic context allowed their attribution to Neanderthals. This paper analyzes sixteen unpublished human teeth (fourteen permanent and two deciduous) by investigating the external morphology and metrical variation with respect to other Neanderthal remains and a sample from modern populations. We also investigate their enamel thickness distribution in 2D and 3D, the enamel-dentine junction morphology (using geometric morphometrics) of one molar and two premolars, the roots and the possible expression of taurodontism, as well as pathologies and developmental defects. The anterior tooth use and paramasticatory activities are also discussed. Morphological and structural alterations were found on several teeth, and interpreted in light of human behavior (tooth-pick) and carnivores' actions (partial digestion). The data are interpreted in the context of the available information for the Eurasian Neanderthals

Les poissons des mers secondaires (I)

Piveteau Jean. Les poissons des mers secondaires (I). In: La Terre et La Vie, Revue d'Histoire naturelle, tome 2, n°3, 1932. pp. 177-179

Marcellin Boule (1891-1941)

Piveteau Jean. Marcellin Boule (1891-1941). In: Bulletins et Mémoires de la Société d'anthropologie de Paris, Nouvelle Série. Tome 1 fascicule 3-4, 1989. pp. 295-299