Lithological Units of Glaciolacustrine Border during the last glaciation in the Jura Range (France)

Dunng the last glacial period (Würm), the Jura range was covered by an ice cap independent of the alpine cap; its length was about 100 km in the NE-SW direction and 40 km in the SE-NW direction. From up-stream, basal tills may be noted, progressively going along to ablation tills, then to coarse deltaic cones and finally to laminated small sized deposits. Numerous sedimentary structures are described in each of the lithologicál units, showing the glacial effect in the formation of these deposits

Lithological Units of Glaciolacustrine Border during the last glaciation in the Jura Range (France)

Dunng the last glacial period (Würm), the Jura range was covered by an ice cap independent of the alpine cap; its length was about 100 km in the NE-SW direction and 40 km in the SE-NW direction. From up-stream, basal tills may be noted, progressively going along to ablation tills, then to coarse deltaic cones and finally to laminated small sized deposits. Numerous sedimentary structures are described in each of the lithologicál units, showing the glacial effect in the formation of these deposits

Marie-Pierre KOENIG dir., 14 contributeurs principaux et la coll. de 8 auteurs, Le gisement de Crévéchamps (Lorraine) : du Néolithique à l’époque romaine dans la vallée de la Moselle

À proximité du village de Crévéchamp en Lorraine, une fouille menée sur quinze hectares de gravières a livré des vestiges qui couvrent une période s’étalant du Néolithique à l’époque romaine. La monographie de ce site exceptionnel présente les résultats exhaustifs des fouilles menées entre 1989 et 1994. Avec 7000 structures relevées, Marie-Pierre Koenig et son équipe ont dû respecter une méthodologie rigoureuse pour établir comment, en deux millénaires, les hommes ont colonisé ce fond de vall..

Relación del rendimiento académico con resultados en las pruebas saber pro de estudiantes de la facultad de ingeniería industrial de la Universidad Libre

En la actualidad, el problema principal de la UNIVERSIDAD LIBRE es que el nivel académico de la Facultad de Ingeniería Industrial de la Universidad Libre esta basado en el rendimiento académico de los estudiantes y de los resultados de las pruebas Saber Pro el cual influye la calidad académica que cuenta la universidad, por un lado se tiene en cuenta la calidad de los profesores y por otra parte el rendimiento académico de los estudiantes que influyen en la calidad, exigencia, metodología y otros factores de los profesores.At present, the main problem of the Free University is the academic level of the School of Industrial Engineering at the Libre University is based on the academic performance of students and the results of the tests Saber Pro which influences the academic quality college counts on the one hand takes into account the quality of teachers and moreover academic performance of students influence the quality, demand, and other factors methodology teacher

Efectos de la temperatura sobre las características físicas de granos actuales de Chenopodium quinoa Willd (quínoa)

La quínoa forma parte de la dieta de numerosas poblaciones andinas desde momentos prehispánicos hasta hoy y su consumo requiere la desaponificación de los granos mediante el escarificado y/o lavado. En Argentina se han registrado restos disecados y carbonizados de esta planta en distintos contextos arqueológicos. Teniendo esto en cuenta, el objetivo de este trabajo es describir el estado de preservación y los efectos de la temperatura sobre las características físicas de granos actuales de quínoa luego de ser sometidos a exposiciones térmicas controladas en laboratorio. Esta experimentación permite concluir que a bajas temperaturas, no se observan indicios macroscópicos de la acción del calor sobre los granos pero sí variaciones de tamaño, mientras que a mayores valores de temperatura el calor ocasiona modificaciones que se aprecian a simple vista. Estas observaciones alertan sobre la importancia de generar colecciones de referencia útiles al momento de realizar interpretaciones arqueológicasThe quinoa is part of the Andean population’s diet since pre-Hispanic times until the present. Its consumption requires the desaponification by scarifying and/or washing the grains. Charred and dry preserved remains of this plant have been found in Argentine in different archaeological contexts. Considering this, the aim of this paper is to describe the preservation state and the effects of the temperature on the physical features of current quinoa grains after controlled thermal exposures in the laboratory. The results of this experimentation show that the macroscopic traces of heat on grains cannot be observed in low temperatures, but it is possible to see the variations of size, while higher temperature produces macroscopic alterations on the grains. These observations alert about the importance of useful reference collections in archaeological interpretation

Calculations of 6^{6}He+p elastic scattering cross sections using folding approach and high-energy approximation for the optical potential

Calculations of microscopic optical potentials (OP's) (their real and imaginary parts) are performed to analyze the $^6$He+p elastic scattering data at a few tens of MeV/nucleon (MeV/N). The OP's and the cross sections are calculated using three model densities of $^6$He. Effects of the regularization of the NN forces and their dependence on nuclear density are investigated. Also, the role of the spin-orbit terms and of the non-linearity in the calculations of the OP's, as well as effects of their renormalization are studied. The sensitivity of the cross sections to the nuclear densities was tested and one of them that gives a better agreement with the data was chosen.Comment: 13 pages, 11 figures, to be published in Eur. Phys. J.

Sediment Micromorphology and Site Formation Processes During the Middle to Later Stone Ages at the Haua Fteah Cave, Cyrenaica, Libya

Understanding the timing, conditions, and characteristics of the Middle to Later Stone Age (MSA/LSA) transition in North Africa is critical for debates regarding the evolution and past population dynamics of Homo sapiens, especially their dispersals within, out of, and back into, Africa. As with many cultural transitions during the Palaeolithic, our understanding is based predominantly on archaeological and paleoenvironmental records preserved within a small number of deep cave sediment sequences. To use such sequences as chronological cornerstones we must develop a robust understanding of the formation processes that created them. This paper utilizes geoarchaeological analyses (field observations, sediment micromorphology, bulk sedimentology) to examine site formation processes and stratigraphic integrity during the MSA/LSA at the Haua Fteah cave, Libya, one of North Africa's longest cultural sequences. The depositional processes identified vary in mode and energy, from eolian deposition/reworking to mass colluvial mudflows. These changing processes impact greatly on the interpretation of the paleoenvironmental and archaeological records, not least in identifying potential colluvial sediment deposition and reworking in layers identified as containing the MSA/LSA transition. This study highlights the importance of developing geoarchaeological analyses of cultural sequences to fully unravel the limitations and potential of their contained archaeological and paleoenvironmental records.ERC, NER

New Insight into the Colonization Processes of Common Voles: Inferences from Molecular and Fossil Evidence

Elucidating the colonization processes associated with Quaternary climatic cycles is important in order to understand the distribution of biodiversity and the evolutionary potential of temperate plant and animal species. In Europe, general evolutionary scenarios have been defined from genetic evidence. Recently, these scenarios have been challenged with genetic as well as fossil data. The origins of the modern distributions of most temperate plant and animal species could predate the Last Glacial Maximum. The glacial survival of such populations may have occurred in either southern (Mediterranean regions) and/or northern (Carpathians) refugia. Here, a phylogeographic analysis of a widespread European small mammal (Microtus arvalis) is conducted with a multidisciplinary approach. Genetic, fossil and ecological traits are used to assess the evolutionary history of this vole. Regardless of whether the European distribution of the five previously identified evolutionary lineages is corroborated, this combined analysis brings to light several colonization processes of M. arvalis. The species' dispersal was relatively gradual with glacial survival in small favourable habitats in Western Europe (from Germany to Spain) while in the rest of Europe, because of periglacial conditions, dispersal was less regular with bottleneck events followed by postglacial expansions. Our study demonstrates that the evolutionary history of European temperate small mammals is indeed much more complex than previously suggested. Species can experience heterogeneous evolutionary histories over their geographic range. Multidisciplinary approaches should therefore be preferentially chosen in prospective studies, the better to understand the impact of climatic change on past and present biodiversity