202038 results
Contributors: chuanxiu luo, Qiang Zhang, Yiping Yang, Chixin Chen, Weiming Jiang, Xiang Su, Rong Xiang, Jianguo Liu, Jun Lu, Mingxi Yang
Date: 2018-06-14
... Surface sedment pollen of 33 seabed surface sediment samples from the northeastern Indian Ocean .
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Contributors: Carlos Eduardo Guedes Catunda
Date: 2018-06-13
... The purpose of this study is to verify the numerical simulation of the finite difference method of the wave propagation in single-layer homogenous anisotropic media and materials with variations in the anisotropy parameters. In this way, the effects of a type of anisotropy, specifically transverse isotropy (system with elastic hexagonal or polar symmetry) can be evaluated in the propagation of waves in elastic media by ultrasonic inspection. The algorithm for the construction of the model applies the finite difference method and was created in FORTRAN language. The evaluated approach is in two-dimensional space. In the simulations with the single-layer homogenous anisotropic model, snapshots of the displacement components were generated in the x and z directions, on which observations were made regarding the effects of the anisotropy parameters on wavefront behavior. The results are in attachment for wide dissemination. This model aims to expose the behavior of wave fronts in relation to variations in anisotropy parameters. The models are formed by a half-plane xz with 2500 x 2500 points. The time frame adopted for this case was 6.5s for each situations. This led to 15 different parameter variations (see data in attachment). The elements present the snapshots of these situations in the single-layer homogenous anisotropic model with horizontal and vertical components of the displacement field, where the source is located at the center of the model. With the images of the displacement field, it is possible to evaluate the profile of the propagated P and S wave fronts for each situation.
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Contributors: Elke Roovers
Date: 2018-06-11
... Supplemental information belonging to the manuscript "Tdrd6a regulates the aggregation of Buc into functional subcellular compartments that drive germ cell specification"
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Contributors: Frederik Leliaert
Date: 2018-06-11
... Alignments, trees and Biogeobears analyses related to the study "Patterns and drivers of species diversity in the Indo-Pacific red seaweed Portieria". Biogeographical processes underlying Indo-Pacific biodiversity patterns have been relatively well studied in marine shallow water invertebrates and fishes, but have been explored much less extensively in seaweeds, despite these organisms often displaying markedly different patterns. Using the marine red alga Portieria as a model, we aim to gain understanding of the evolutionary processes generating seaweed biogeographical patterns. Our results will be evaluated and compared with known patterns and processes in animals. Species diversity estimates were inferred using DNA-based species delimitation methods. Historical biogeographical patterns were inferred based on a six-gene time-calibrated phylogeny, distribution data of 802 specimens, and probabilistic modelling of geographic range evolution. The importance of geographic isolation for speciation was further evaluated by population genetic analyses at the intraspecific level. We delimited 92 candidate species, most with restricted distributions, suggesting low dispersal capacity. Highest species diversity was found in the Indo-Malay Archipelago (IMA). Our phylogeny indicates that Portieria originated during the late Cretaceous in the area that is now the Central Indo-Pacific. The biogeographical history of Portieria includes repeated dispersal events to peripheral regions, followed by long-term persistence and diversification of lineages within those regions, and limited dispersal back to the IMA. Our results suggest that the long geological history of the IMA played an important role in shaping Portieria diversity. High species richness in the IMA resulted from a combination of speciation at small spatial scales, possibly as a result of increased regional habitat diversity from the Eocene onwards, and species accumulation via dispersal and/or island integration through tectonic movement. Our results are consistent with the biodiversity feedback model, in which biodiversity hotspots act as both ‘centres of origin’ and ‘centres of accumulation’, and corroborate previous findings for invertebrates and fish that there is no single unifying model explaining the biological diversity within the IMA.
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Contributors: Christopher Oze, Cynthia Werner, Travis Horton, Matthew Hanson
Date: 2018-06-11
... All data used in the manuscript is contained in these files
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Contributors: Carlos Eduardo Guedes Catunda, João Marcos Alcoforado Rebello
Date: 2018-06-08
... The purpose of this study is to verify the numerical simulation of the finite difference method of the time of flight diffraction (TOFD) in studies of welded joints and multi-layer models, for the case of multi-layer welded joints. In this way, the effects of a type of anisotropy, specifically transverse isotropy (system with elastic hexagonal or polar symmetry) can be evaluated in the propagation of waves in elastic media by ultrasonic inspection. The algorithm for the construction of the model applies the finite difference method and was created in FORTRAN language. The evaluated approach is in two-dimensional space. The evaluated case is composed of a cross-sectional model of a welded joint similar to the one shown in the Figure below, with the insertion of discontinuities to the material. This case aims mainly to evaluate the propagation behavior of the wave in relation to its interaction with discontinuities of different sizes and positions within the material. Thus, through the response of A-Scan signals (echogram), it was possible to evaluate the relevant parameters to obtain a satisfactory non-destructive inspection. The models of the welded joints are formed by a plane of depth xz with 5000 x 1500 points in the respective directions. For practical purposes, spatial sampling rules according to domain size were approximated in terms of the total number of arithmetic operations in finite difference schemes of higher order; for this, five points were used for the smallest wavelength defined by the minimum velocity in the model. In this way, all the simulated images (components of the displacement field and cross sections) are presented with a factor of five of mesh contraction, that is, the sample grid with 5000 x 1500 points becomes 1000 x 300 points (indicated in the figures). ). This transformation is important for the reduction of the arithmetic operations involved and in the computational time spent for the compilation of the elastic property files, but it does not present any visual alteration in the presentation of these images. The temporal sampling interval adopted for this case was 35.0s with temporal resolution of 4.7ns. In the simulations with the model (welded joints), A-Scan echograms were generated. The results are attached for wide dissemination.
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Contributors: Sergio A. M. Lima
Date: 2018-06-07
... Set of raw/processed data related to the experiments of the manuscript "Development and in vitro study of a luminescent hybrid based on silica decorated with europium-complexes for use in cellular imaging" submitted to Biomaterials.
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Contributors: mohd rashidi abdull manap, Mohd Farid Ismail
Date: 2018-06-06
... Cis Z MNYAD_1539_cis_DFT_B3LYP_6-31G* MNYAD_1539_cis_DFT_B3LYP_6-31G*/cc-PVTZ Trans E MNYAD_1539_trans_DFT_B3LYP_6-31G* MNYAD_1539_trans_DFT_B3LYP_6-31G*/cc-PVTZ
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Contributors: Elvio Blini, Caroline Tilikete, Alessandro Farnè, Fadila Hadj-Bouziane
Date: 2018-06-06
... Data, full analysis pipeline and scripts, extra graphical depictions for the paper titled: "Probing the role of the vestibular system in motivation and reward-based attention" by Elvio Blini, Caroline Tilikete, Alessandro Farnè, and Fadila Hadj-Bouziane. For information contact: elvio.blini (at) gmail.com
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Contributors: Emma Liu, Marie Edmonds, Alison Rust, Katharine Cashman
Date: 2018-06-06
... Supplementary data for "Insights into the dynamics of mafic magmatic-hydromagmatic eruptions from volatile degassing behaviour" (Liu et al.,) Table S1: Major element compositions for Hverfjall tephra, normalised to anhydrous composition. Sample names are as described in Table 1. Table S2: Fourier Transform Infrared Spectroscopy (FTIR) analytical conditions and results. Table S3: Sulfur speciation values determined from the wavelength position of the sulfur Ka peak, following Carroll and Rutherford (1988), and corresponding oxygen fugacity using the calibrations of Jugo et al., (2005, 2010)
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