Archean crust-mantle geochemical differentiation

Isotope measurements on carbonatite complexes and komatiites can provide information on the geochemical character and geochemical evolution of the mantle, including the sub-continental mantle. Measurements on young samples establish the validity of the method. These are based on Sr, Nd and Pb data from the Tertiary-Mesozoic Gorgona komatiite and Sr and Pb data from the Cretaceous Oka carbonatite complex. In both cases the data describe a LIL element-depleted source similar to that observed presently in MORB. Carbonatite data have been used to study the mantle beneath the Superior Province of the Canadian Shield one billion years (1 AE) ago. The framework for this investigation was established by Bell et al., who showed that large areas of the province appear to be underlain by LIL element-depleted mantle (Sr-85/Sr-86=0.7028) at 1 AE ago. Additionally Bell et al. found four complexes to have higher initial Sr ratios (Sr-87/Sr-86=0.7038), which they correlated with less depleted (bulk earth?) mantle sources, or possibly crustal contamination. Pb isotope relationships in four of the complexes have been studied by Bell et al

Marine resources and ocean surveys

Application of ERTS-1 remotely sensed multispectral imagery to marine resources and oceanic observations and surveys - Conferenc

Aberrant Ovules in Angiosperms: A Review of Selected Examples and New Observations on Ornithogalum caudatum (Liliaceae)

While studying the events of megasporogenesis and megagametogenesis in Ornithogalum caudatum Ait., two ovules were observed which were quite different from the others. These two ovules were from separate ovaries, but the aberrant condition was the same in each ovule. In both cases, the ovule consisted of a single set of integuments enclosing two side-by-side nucelli each with its own developing megaspore. Such multiple-megagametophyte ovules may represent a now-defunct developmental pathway from the early evolutionary history of angiosperm ovules

Meta-Analytic Connectivity Modelling of Healthy Swallowing

A quantitative, voxel-wise meta-analysis was performed to investigate the brain regions involved in healthy human swallowing. Studies included in the meta-analysis (1) examined water swallowing, saliva swallowing, or both, (2) included healthy, normal subjects, and (3) reported stereotaxic brain activation coordinates in standard space. Following these criteria, a systematic literature review identified 8 studies that met the criteria. An activation likelihood estimation (ALE) meta-analysis and meta-analytic connectivity modelling (MACM) analysis were performed with BrainMap software. Ten clusters with high activation likelihood were found in the bilateral precentral gyri, right insula, left declive, right medial frontal gyrus, right dorsal nucleus of the thalamus, and the bilateral dentate nuclei of the cerebellum. Meta-analytic connectivity modelling revealed functional two-way and one-way connections between the regions, forming an interconnected network. Together, these finding indicate an extensive swallowing network made up of the key activated regions and the associated areas within those regions

An Annotated Bibliography and Subject Index on Female Reproductive Anatomy and Fertilization in Angiosperms

This bibliographical compilation is in two parts. One is coupled with a tabulated subject index of works on female reproductive anatomy and fertilization in angiosperms. It emphasizes papers published between 1965 and 1980, but a few citations predating 1966 are included. Although some entries are primarily methodological works, papers dealing strictly with experimental techniques, apomixis per se, incompatibility per se, floral morphology per se, teratological papers, abstracts, theses, and dissertations, have been omitted intentionally. The second bibliography encompasses theoretical discussions, broad summaries, review papers, books, other secondary sources, and some primary references covering a wide taxonomic range. It is indexed by author only

Applications of a CNN for Automatics Classifications of Outsole Features

Learning Overview: After attending this presentation, attendees will be familiar with the ways that CNNs can be applied to classify forensic pattern evidence, specifically with shoe outsole features

Letters from Chas. Eldered Shelton, John L. Tilton, George Clammer, and Wallace R. Lane

Letters concerning A. G. Reid, an applicant for position in athletic department at Utah Agricultural College