Filter Results
1779262 results
  • Contact materials for electrical switch gears are widely used for connecting and disconnecting electric circuits. These contacts are two component systems, where the contact tips are brazed to the carriers prior to installation. The contacts used in the present work is a 3 layered sandwich structure consisting of a silver-tin oxide layer, a silver inter-layer and a thin layer of the braze. The carrier itself is copper-plated steel. The brazing process is accomplished by a high frequency inductive heating process. By varying the brazing parameters, namely, temperature and time, their influence on joint formation is investigated. The brazing joint of the contact tips were characterized by microscopy and physical analytical techniques. The mechanical characteristics were determined with Vickers micro-hardness. To investigate the dependence of temperature and/or time on joint formation, during induction brazing using high frequency inductive heating, experiments were carried out by setting up a proprietary brazing setup. Temperature monitoring was carried out using a pyrometer and thermocouple, placed deductively around the brazing sample to ascertain temperature variations in the brazing sample. Temperature disparities due to measurements with the pyrometer and thermocouple were also ascertained. To enable correct temperature determination using the pyrometer, the emissivity was investigated and compared with the thermocouple. Proper brazing data collection was ensured by investigating all relevant brazing parameters, namely, brazing temperature, sample heat up time, sample holding time under the specified brazing temperature and the time spent by the braze in the molten state. Scanning electron microscopy was carried out to investigate microstructural changes in the brazed joint at different brazing parameters. Optical light microscopy was used to acquire information about the layer thickness, microstructure evolution and porosity. Hardness of the individual brazed layers was assessed using Vickers Micro-hardness for different brazing parameters. EDX-SEM elemental mapping was carried out to ascertain the chemical compositional variations at the contact-carrier interface resulting from different brazing parameters. This data can be re-used for brazing experiments to ascertain the correct brazing parameters for effective brazing without the inclusion of porosity, determine the brazing parameters to monitor the increase in pore size and volume, ensure the formation of the Cu-Ag-P eutectic phase to encourage a decrease in the Phosphorus content in the joint zone, determine the temperature range for dissolution of the brittle Cu(III)P phase, and automate the brazing process by using a pyrometer to determine the brazing joint temperature.
    Data Types:
    • Other
    • Image
    • Tabular Data
    • Dataset
  • The investigation related to these data aimed to track sources, molecular composition, and structural information of sedimentary fulvic (FA) and humic (HA) acids across a subtropical reservoir. This data set includes results from 13C nuclear magnetic resonance (13C NMR, raw spectra files), Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS), organic carbon distribution (from fractionation using ultrafiltration), fluorescence and UV/VIS spectrometry. These techniques were used to investigate the origin and characteristics of FA and HA extracted from surface sediments from seven sampling sites (P1-P7) in Itupararanga Reservoir (Brazil). The results showed that samples from the upstream part of the reservoir (P1-P2) have more aromatic, oxygen-poor (O/C ratio 0.5) and partly more unsaturated compounds for FA as well as oxygen-poor and saturated compounds with H/C > 1.1 for HA. Many oxygen-poor molecules were present in HA samples but in none of the FA samples.
    Data Types:
    • Other
    • Software/Code
    • Image
    • Tabular Data
    • Dataset
    • Document
    • Text
  • The Marfan’s syndrome is an autosomal dominant genetic disease that affects connective tissue, with an incidence of approximately one case for every 5000 individuals. Cardiovascular involvement often occurs in adulthood. As the most common manifestation of the syndrome, ascending aortic aneurysm frequently leads individuals to conditions of clinical emergencies, the emergency room and intensive care unit are a common sites for diagnosing cardiac disorders in patients with Marfan. In this article we find the case report of a 41-year-old patient with a history of chest pain, signs and symptoms of heart failure, admitted to the ICU, with phenotypic manifestations of the disease, whose aortic aneurysm was diagnosed during the initial examination of POCUS. As it is a relatively rare diagnosis, in a rural patient who until now was unaware of the diagnosis itself, the result of which was identified in a routine examination in the ICU, performed with a portable device, the ability to change the outcome of a disease with high morbidity and mortality with a simple exam, easy to access and with low training requirements in a highly complex unit, even in distant care units in a population with low socioeconomic status. This article aims to show how a simple examination, POCUS, performed with a handheld device, is able to identify complex, high-impact diseases.
    Data Types:
    • Image
    • Video
    • Dataset
  • We share data on the delimitation of urban agglomeration structure around the Rostov-on-Don, the administrative center of the Southern federal district of the Russian Federation. Data is divided by 29 urban settlements of the Rostov region. Excel sheet presents data on the remoteness of all settlements of Rostov agglomeration from the core - the city of Rostov-on-Don. The indicators used include the straight-line distance to Rostov-on-Don (in km), the travel time by car, by public transport, and the average travel time measured in minutes (map 1). The map on Rostov agglomeration structure exhibit the agglomeration core, the three agglomerations arcs, and the two conurbations.
    Data Types:
    • Image
    • Tabular Data
    • Dataset
  • Animal modelling for infectious diseases is critical to understand the biology of the pathogens including viruses and to develop therapeutic strategies against it. Herein, we present the sequence homology and expression data analysis of proteins found in Drosophila melanogaster that are orthologous to human proteins, reported as components of SARS-CoV-2/Human interactome. The dataset enlists sequence homology, query coverage, domain conservation, OrthoMCL and Ensembl Genome Browser support of 326 proteins in D.melanogaster that are potentially orthologous to 417 human proteins reported for their direct physical interactions with 28 proteins encoded by SARS-CoV-2 genome. Expression of these D.melanogaster orthologous genes in 26 anatomical positions are also plotted as heat maps in 27 sets, corresponding to the potential protein interactors for each viral protein. The data could be used to direct experiments and potentially predict their phenotypic and molecular outcome in order to dissect the biological roles and molecular functionality of SARS-CoV-2 proteins in a convenient animal model system like D.melanogaster.
    Data Types:
    • Software/Code
    • Image
    • Tabular Data
    • Dataset
    • Document
    • Text
  • The dataset contains two folders. 1. In the "virtual_microscopy" folder, you can find a short screen recording showing how PetroScan works. PetroScan is the built-in toolbox of Virtual Petrography (ViP) platform used for displaying digital thin section images under different modes. The video records the extinction behavior and the change of inference color of quartz and mica in a mylonite sample under cross-polarized when moving the angle selection wheel. 2. "Superpixel_evaluation_example" contains boundary maps and raw images of a subarea of Bentheimer Sandstone. The superpixel segmentation results using different superpixel algorithms can be found in the subfolder "qualitative_evaluation".
    Data Types:
    • Image
    • Video
    • Tabular Data
    • Dataset
  • This supplementary materials contain the supplementary information Table S1 and Figure S1, as well as the R scripts and data files to perform the analyses.
    Data Types:
    • Software/Code
    • Image
    • Dataset
    • Document
    • File Set
  • Hickey et al full western blot images
    Data Types:
    • Image
    • Dataset
  • Compressive thermal creep of U3Si2 measured at the University of South Carolina. Folders are organized by Pellet ID as described by E. Mercado. Data processing scripts were originally written in python 2.x by R. Austin Freeman and modified by J.A. Yingling.
    Data Types:
    • Software/Code
    • Image
    • Tabular Data
    • Dataset
  • Three extreme danger scenarios were designed, and the TruckSim and Simulink software co-simulation was used to obtain the motion data of heavy-duty vehicles under the anti-rollover motion planning, so as to verify the effectiveness of the algorithm.
    Data Types:
    • Other
    • Slides
    • Image
    • Dataset
    • Document
3