A Study of 2 Ghz Region Electromagnetic Propagation over Selected Terrains Progress Report, 28 Feb. - 1 Sep. 1966

Fade margin and median received signal power for reliable microwave propagatio

F11RS SGR No. 11 (LGBT Month)

A RESOLUTION To urge and request the administration of Louisiana State University to recognize October as LGBT history mont

High-throughput synthesis of thermoelectric Ca3_3Co4_4O9_9 films

Properties of complex oxide thin films can be tuned over a range of values as a function of mismatch, composition, orientation, and structure. Here, we report a strategy for growing structured epitaxial thermoelectric thin films leading to improved Seebeck coefficient. Instead of using single-crystal sapphire substrates to support epitaxial growth, Ca$_3$Co$_4$O$_9$ films are deposited, using the Pulsed Laser Deposition technique, onto Al$_2$O$_3$ polycrystalline substrates textured by Spark Plasma Sintering. The structural quality of the 2000 \AA thin film was investigated by Transmission Electron Microscopy, while the crystallographic orientation of the grains and the epitaxial relationships were determined by Electron Back Scatter Diffraction. The use of a polycrystalline ceramic template leads to structured films that are in good local epitaxial registry. The Seebeck coefficient is about 170 $\mu$V/K at 300 K, a typical value of misfit material with low carrier density. This high-throughput process, called combinatorial substrate epitaxy, appears to facilitate the rational tuning of functional oxide films, opening a route to the epitaxial synthesis of high quality complex oxides.Comment: Submitted to Applied Physics Letters (2013

A study of 2 GHz region electromagnetic propagation over selected terrains Progress report, 1 Sep. 1965 - 1 Mar. 1966

Microwave propagation reliability over selected terrain in optical path

A study of 2 GHz electromagnetic wave propagation over optical paths in three geographical regions of the United States

Statistical correlation between optical microwave propagation reliability, fade margin, path length, and geographic locatio

The Genome of the "Great Speciator" Provides Insights into Bird Diversification

Among birds, white-eyes (genus Zosterops) have diversified so extensively that Jared Diamond and Ernst Mayr referred to them as the “great speciator.” The Zosterops lineage exhibits some of the fastest rates of species diversification among vertebrates, and its members are the most prolific passerine island colonizers. We present a high-quality genome assembly for the silvereye (Zosterops lateralis), a white-eye species consisting of several subspecies distributed across multiple islands. We investigate the genetic basis of rapid diversification in white-eyes by conducting genomic analyses at varying taxonomic levels. First, we compare the silvereye genome with those of birds from different families and searched for genomic features that may be unique to Zosterops. Second, we compare the genomes of different species of white-eyes from Lifou island (South Pacific), using whole genome resequencing and restriction site associated DNA. Third, we contrast the genomes of two subspecies of silvereye that differ in plumage color. In accordance with theory, we show that white-eyes have high rates of substitutions, gene duplication, and positive selection relative to other birds. Below genus level, we find that genomic differentiation accumulates rapidly and reveals contrasting demographic histories between sympatric species on Lifou, indicative of past interspecific interactions. Finally, we highlight genes possibly involved in color polymorphism between the subspecies of silvereye. By providing the first whole-genome sequence resources for white-eyes and by conducting analyses at different taxonomic levels, we provide genomic evidence underpinning this extraordinary bird radiation

Floresta dos Borbas, uma nova localidade com pistas de dinossauros na Bacia de Sousa, Paraíba, Brasil.

A new site with dinosaur tracks from the Sousa Basin, Lower Cretaceous of Northeast Brazil is presented. Floresta dos Borbas is the sixth dinosaur tracksite found in the Antenor Navarro Formation. Two theropod trackways are described as well as three sauropod tracks. The sauropod record in this region indicates a restriction to the northern portion of the basin, mostly found in the Antenor Navarro Formation and probably the basal portion of the Sousa Formation. A preliminary analysis indicates that the lower portion of the stratigraphic sequence that forms the Sousa Basin was deposited in a different paleoenvironmental condition than the upper part, being possibly more favorable for sauropods.Uma nova localidade com pistas de dinossauros da Bacia de Sousa, parte do complexo de bacias do Rio do Peixe, Cretáceo Inferior do Nordeste do Brasil, é apresentada. A região, conhecida como Floresta dos Borbas, forma a sexta localidade com pistas e pegadas de dinossauros encontrada na Formação Antenor Navarro. Duas pistas de terópodes e três pegadas de saurópodes são descritas. O registro de pegadas de saurópodes está restrito à parte norte da bacia, procedente da Formação Antenor Navarro e possivelmente à base da Formação Sousa. Uma análise ainda bastante preliminar sugere a existência de diferentes condições paleoambientais na base da seqüência estratigráfica que forma esta bacia, possivelmente mais favorável ao desenvolvimento de uma comunidade de saurópodos do que a parte superior