Hominin palaeoecology in Late Pliocene Malawi : first insights from isotopes (13C, 18O) in mammal teeth

Carbon-13 and oxygen-18 abundances were measured in large mammal skeletal remains (tooth enamel, dentine and bone) from the Chiwondo Beds in Malawi, which were dated by biostratigraphic correlation to ca. 2.5 million years ago. The biologic isotopic patterns, in particular the difference in carbon-13 abundances between grazers and browsers and the difference in oxygen-18 abundances between semi-aquatic and terrestrial herbivores, were preserved in enamel, but not in dentine and bone. The isotopic results obtained from the skeletal remains from the Chiwondo Beds indicate a dominance of savannah habitats with some trees and shrubs. This environment was more arid than the contemporaneous Ndolanya Beds in Tanzania. The present study confirms that robust australopithecines were able to live in relatively arid environments and were not confined to more mesic environments elsewhere in southern Africa

High temperature cobalt-base alloy Patent

High temperature cobalt-base alloy resistant to corrosion by liquid metals and to sublimation in vacuum environmen

Cobalt-base alloy

A microstructurally stable, high strength cobalt based alloy for use at elevated temperatures to 2125 F was developed. The alloys are particularly directed for use in stators and other low stress components in advanced gas turbines

Short-Term Urban Service Trips: Relevance in Ministry and their Impact on Adolescents\u27 Perception of the City and Continued Service

Short-term urban service trips that include active service, education and guided reflection are an appropriate introduction to urban ministry for adolescents. Eighteen adolescents were interviewed at the end of a week-long service trip facilitated by Discovering Opportunities for Outreach and Reflection in Chicago, and then interviewed again four months later. Short-term urban service trips develop and positively influence adolescents\u27 perception of the city. Adolescents\u27 involvement in community service post-trip was not generally influenced by their experience; involvement is correlated with their pre-trip activity

A Dissipative Model for Hydrogen Storage: Existence and Regularity Results

We prove global existence of a solution to an initial and boundary value problem for a highly nonlinear PDE system. The problem arises from a thermomechanical dissipative model describing hydrogen storage by use of metal hydrides. In order to treat the model from an analytical point of view, we formulate it as a phase transition phenomenon thanks to the introduction of a suitable phase variable. Continuum mechanics laws lead to an evolutionary problem involving three state variables: the temperature, the phase parameter and the pressure. The problem thus consists of three coupled partial differential equations combined with initial and boundary conditions. Existence and regularity of the solutions are here investigated by means of a time discretization-a priori estimates-passage to the limit procedure joined with compactness and monotonicity arguments

Start with the Heart: Equipping Elementary School Early Learners for Success

Come learn about Start with the Heart, a state collaboration between Metropolitan Regional Educational Service Agency, the Georgia Department of Education, and the Department of Early Care and Learning that aligns the Program-wide PBIS and School-wide PBIS frameworks in elementary schools Pre-K – 3rd grade. The blending is designed to ensure these early learners are equipped with social emotional, developmentally appropriate practices that will lead to more positive behavior, as well as lifelong social emotional and academic success. Three metro Atlanta elementary schools currently participating in the state effort will share glows and grows experienced during implementation of the various critical elements essential to this aligned PBIS framework