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360 results for “Cements”
Superior Survival of Fully Cemented Fixation Compared to Hybrid Fixation in a Single Design Rotating Hinge Knee Implant
<p><span>Dataset with 275 RT-PLUS® rotating hinge knee implants (Smith and Nephew, Memphis, TN, USA) in 269 patients (60 primary procedures, 215 revisions). Of the 275 implants, 248 had a uniform fixation technique for both components (148 fully hybrid, 100 fully cemented), while 27 implants had a mixed fixation technique for the components (15 hybrid femur and fully cemented tibia, 12 fully cemented femur and hybrid tibia). Outcome was revision for aspectic loosening. The median follow-up was 7.3 ± 3.9 years, with a minimum of 2 years for non-failed implants. </span></p>
Global and National CO2 Uptake by Cement Carbonation from 1928 to 2024
<p>This dataset is associated with the publication on Earth System Science Data, with the same title.<br>It includes five sections including the model inputs of the estimation models, the simulation results of global CO2 emission and uptake by year, the variables and ranges considered in the uncertainty analyses of the uptake estimation and the corresponding confidence intervals from the analyses. <br>For detailed explanations of these datasets, one should should refer to the original manuscript. <br><br></p>
Micromechanics of dental cement paste
<p>These zipped folders contains underlying raw data, figures, and codes used for analyses in Dohnalik et al, Journal of the Mechanical Behavior of Biomedical Materials, 124, (2021) 104863, <a href="https://doi.org/10.1016/j.jmbbm.2021.104863">https://doi.org/10.1016/j.jmbbm.2021.104863</a>. The contents of the individual folders are described in the "README.txt" files; they are located in each zipped folder.</p> <p>The data were produced as part of the work carried out at the Vienna University of Technology (TU Wien), AT, under the EC H2020-MSCA-ITN project ‘ERICA: Engineered Calcium-Silicate-Hydrates for Applications’, Grant Agreement No. 764691 (November 2017 – February 2022).</p>
Dataset: Insights on chemical and physical chloride binding in blended-cement pastes
<p>Raw and analysed results to go with the publication:</p> <p> </p> <p><strong>Insights on chemical and physical chloride binding in blended-cement pastes</strong></p> <p><strong>William Wilson<sup>a,b,*</sup>, Julien Nicolas Gonthier<sup>a</sup>, Fabien Georget<sup>a,c</sup>, Karen L. Scrivener<sup>a</sup></strong></p> <p><strong>Cement and Concrete Research, Volume 156, June 2022, 106747</strong></p> <p> </p> <p><sup>a</sup>Laboratory of Construction Materials, EPFL, 1015 Lausanne, Switzerland </p> <p><sup>b</sup>Université de Sherbrooke, Sherbrooke, QC, Canada </p> <p><sup>c</sup>Institute of Building Materials Research, RWTH Aachen, Aachen, Germany</p> <p> </p> <p>*Corresponding author: william.wilson@usherbrooke.ca</p>
Raw data for "Limestone calcined clay binders based on a Belite-rich cement"
<p>Raw data for "Limestone calcined clay binders based on a Belite-rich cement". Includes: Calorimetry, TA, LXRPD and MIP data.</p>
Data set for: Effects of microstructure evolution on compressive strength of silica sand-enhanced oil well cement at a wide temperature range
<p><span>The influence of microstructure of silica-enhanced cement on the mechanical performance of cement is difficult to be described. In this study, we used the scanning electron microscope and image processing method to investigate the relationship between the complicity of cement microstructure and compressive strength under various temperature and curing time conditions. Fractal dimension was applied to describe the complicity of cement. The relationships among compressive strength, fractal dimension, temperature, curing time and pore structure of cement were identified. The results show that curing time of cement directly control the complicity of cement microstructure and compressive strength by altering the pore orientation and macropore ratio in cement. The curing temperature affects the complicity of cement microstructure and compressive strength indirectly by changing the ratio of micropore and small pore. The fractal dimension of silica-enhanced cement shows good correlation with compressive strength. Pore size distribution is the most important factor that influence the complicity of cement matrix and compressive strength of silica-enhanced cement. When building up the macroscopic mechanical performance model of cement, we should consider the influence of pore size distribution in cement under different curing temperatures and times on the complicity of cement microstructure. </span></p>
a nice weathered plank and cement bench
plank and cement bench in Guttenberg NJ, sometimes used by skaters sometimes by old folks more often than not both at the same time Created with Polycam Source: Objaverse 1.0 / Sketchfab
Influence of Green Human Resource Practices on Environment Sustainability of Cement Industry in Pakistan
<p>Global warming aligns firms green human resource management (HRM) practices, categories with environmental sustainability. Researchers believes that environment friendly practices, employees’ empowerment, awareness towards green environment promotes firms’ businesses. Aim of the current study is analysis of the GHRM practices on environment sustainability of cement industry in Pakistan. The first hypothesis was Green recruitment and selection practice have significant influence on environmental sustainability of cement industry in Pakistan. The second hypothesis was green performance management practice have significant influence on environmental sustainability of cement industry in Pakistan. There were two independent variables (green recruitment and selection and green performance management and appraisal) one dependent variable environment sustainability were tested. SPSS and2nd generation statistical software Smart PLS 3.2.9 were used for the measurement model and structural model. Both hypotheses show significance level i.e., green recruitment and selection GRaS>ES (β = .235, t = 2.385, p < .003) with f2 of .035 and green performance appraisal GPA>ES (β = .258, t = 3.345, p < .002) with f2 of .025 were significant. The current study suggests that employees’ recruitments and appraisals in private sector should be performed on the GHRM practices to achieve the environment sustainable goals.</p>
Dataset for 'Mix and measure II – joint high-energy laboratory powder diffraction and microtomography for cement hydration studies'
<p>Dataset for 'Mix and measure II – joint high-energy laboratory powder diffraction and microtomography for cement hydration studies'. Includes data for: calorimetry, PSD, thermal analysis, LXRPD and μCT.</p>
Dataset - Global site-specific health impacts of fossil energy, steel mills, oil refineries and cement plants
<div> <div> <p>Climate change and particulate matter air pollution present major threats to human well-being by causing impacts on human health. Both are connected to key air pollutants such as carbon dioxide (CO<span><span><span>2</span></span></span>), primary fine particulate matter (PM<span><span><span>2.5</span></span></span>), sulfur dioxide (SO<span><span><span>2</span></span></span>), nitrogen oxides (NO<span><span><span>x</span></span></span>) and ammonia (NH<span><span><span>3</span></span></span>), which are primarily emitted from energy-intensive industrial sectors. We present the first study to consistently link a broad range of emission measurements for these substances with site-specific technical data, emission models, and atmospheric fate and effect models to quantify health impacts caused by nearly all global fossil power plants, steel mills, oil refineries and cement plants. The resulting health impact patterns differ substantially from far less detailed earlier studies due to the high resolution of included data, highlighting in particular the key role of emission abatement at individual coal-consuming industrial sites in densely populated areas of Asia (Northern and North-Eastern India, Java in Indonesia, Eastern China), Western Europe (Germany, Belgium, Netherlands) as well as in the US. Of greatest health concern are the high SO<span><span><span>2</span></span></span> emissions in India, which stand out due to missing flue gas treatment and cause a particularly high share of local health impacts despite a limited number of emission sites. At the same time, the massive infrastructure and export capacity build-up in China in recent years is taking a substantial toll on regional and global health and requires more stringent regulation than in the rest of the world due to unfavorable environmental conditions and high population densities. The current phase-out of highly emitting industries in Europe is found not to have started with sites having the greatest health impacts. Our detailed site-specific emission and impact inventory is able to highlight more effective alternatives and to track future progress.</p> </div> </div>
Electrodeposition of calcareous cement from seawater in marine silica sands – Data
<p>Quantitative data in support of the publication titled "Electrodeposition of calcareous cement from seawater in marine silica sands" by Andony Landivar Macias, Steven D. Jacobsen, and Alessandro F. Rotta Loria.</p>
Dataset - Impact of alkalis and shrinkage-reducing admixtures on hydration and pore structure of hardened cement pastes
<p>XRD and TGA data for cement pastes at various content of alkali and SRA at ages of 7 days to 1 year.</p>
Chemistry and Mass Density of Aluminum Hydroxide Gel in Eco- Cements by Ptychographic X‑ray Computed Tomography
<p>Raw data for: Chemistry and Mass Density of Aluminum Hydroxide Gel in Eco- Cements by Ptychographic X‑ray Computed Tomography </p> <p>doi: http://dx.doi.org/10.1021/acs.jpcc.6b10048</p> <p> </p> <p>Eco-cements are a desirable alternative to ordinary Portland cements because of their lower CO<sub>2</sub> footprints. Ye'elimite-based eco-cements are attracting a lot of interest but most of them exhibit relatively poor mechanical properties. Understanding the reasons for the low performances requires the characterization of features such as mass density of the hydrated mineralogical phases, including the amorphous gel, on the sub-micrometer scale which is very challenging. Here we use ptychographic X-ray computed tomography to provide 3D mass density and attenuation coefficient distributions of eco-cement pastes with an isotropic resolution close to 100 nm allowing to distinguish between mineralogical phases with very similar contrast. In combination with laboratory techniques such as the Rietveld method, <sup>27</sup>Al MAS-NMR and electron microscopies, we report compositions and densities of key components. The ettringite and gel volume distributions have been mapped out in the segmented tomograms. Moreover, we discriminate between an aluminum hydroxide gel and calcium aluminum monosulfate, which have close electron density values. Specifically, the composition and mass density of two aluminum hydroxide gels have been determined: (CaO)<sub>0.04</sub>Al(OH)<sub>3</sub>·2.3H2O with 1.48(3) g∙cm<sup>-3</sup> and (CaO)<sub>0.12</sub>Al(OH)<sub>3</sub> with 2.05(3) g∙cm<sup>-3</sup>, which was a long standing challenge.</p>
Numerical data pertaining to phase-field simulations of quartz cementation in polycrystalline sandstones
<p>The numerical data in this repository pertains to the simulation results of quartz cementation in polycrystalline sandstones. The simulations were performed using the software package named "Pace3D version 2.5.1". The software license can be purchased at Steinbeis Network (www.steinbeis.de) in the management of Britta Nestler and Michael Selzer under the subject area ‘Material Simulation and Process Optimization’. </p> <p>The data is organized, the way it appears in the figures in the manuscript. Thus, the folders are named according to the figure number in the manuscript. Each folder contains a separate ReadMe.dat file, which contains all the information regarding the data present in that folder.</p> <p> </p> <ul> <li> For the sake of convenience, the simulation data that comprises the pictures is converted to .stl and .vtk format, for visualization using open source software packages like Paraview and MeshLab.</li> <li>The original complete output data is in the formats (e.g. *.phiindex.p3s, *.fluiddynamics_velocity.p3v etc.) which can be visualized using the in-house visualization tools GLviewer and XSimview.</li> <li>The data presented in plots is extracted from the simulation output using the post-processing tool chain of "Pace3D".</li> </ul> <p> </p>
Global CO2 uptake by cement materials accounts 1930-2023
<p>This dataset is associated with the publication on Scientific Data, with the same title.<br>It includes five sections including the model inputs of the estimation models, the simulation results of global CO2 emission and uptake by year, the variables and ranges considered in the uncertainty analyses of the uptake estimation and the corresponding confidence intervals from the analyses. <br>For detailed explanations of these datasets, one should should refer to the original manuscript. </p>
Data in support of: Biomineralization of plastic waste to improve the strength of plastic-reinforced cement mortar
<p></p><p>The development of methods to reuse large volumes of plastic waste is essential to curb the environmental impact of plastic pollution. Plastic-reinforced cementitious materials (PRCs), such as plastic-reinforced mortar (PRM), may be potential avenues to productively use large quantities of low-value plastic waste. However, poor bonding between the plastic and cement matrix reduces the strength of PRCs, limiting its viable applications. In this study, calcium carbonate biomineralization techniques were applied to coat plastic waste and improved the compressive strength of PRM. Two biomineralization treatments were examined: enzymatically induced calcium carbonate precipitation (EICP) and microbially induced calcium carbonate precipitation (MICP). MICP treatment of polyethylene terephthalate (PET) resulted in PRMs with compressive strengths similar to that of plastic-free mortar and higher than the compressive strengths of PRMs with untreated or EICP-treated PET. Based on the results of this study, MICP was used to treat hard-to-recycle types 3–7 plastic waste. No plastics investigated in this study inhibited the MICP process. PRM samples with 5% MICP-treated polyvinyl chloride (PVC) and mixed type 3–7 plastic had compressive strengths similar to plastic-free mortar. These results indicate that MICP treatment can improve PRM strength and that MICP-treated PRM shows promise as a method to reuse plastic waste.</p><p></p>
Dataset for Nigeria cement sector emissions scenarios in Yetano Roche (2022)
<p>Dataset and tool for "Built for net-zero: analysis of long-term greenhouse gas (GHG) emission pathways for the Nigerian cement sector", Journal of Cleaner Production (2022)</p>
Effect of cement on the consolidation behavior of marine clay in comparison with clay minerals
<p>This is data for paper ""<strong>Effect of cement on the consolidation behavior of marine clay in comparison with clay minerals</strong></p>
Study on a quantitative method for determining mixing proportion of transparent cemented soil for visual geotechnical model tests
<p>An effective mixing of transparent cemented soil is necessary for visual geotechnical model tests, so a quantitative method for determining mixing proportion of transparent cemented soil was generated in this paper. Firstly, quartz sand, Nanoscale silica powder and N-dodecane mixed 15# white oil were selected as the raw materials, and a series of orthogonal experiments were designed. Concurrently, the main physical and mechanical parameters (volumetric weight γ, internal friction angle φ, cohesion c) of transparent cemented soil were measured, caused by the change of "particle size of quartz sand" and " mass ratios between fumed silica and fused quartz". Subsequently, multiple linear regression equations of various physical and mechanical parameters (γ, φ, c) were obtained by fitting the original test data. Finally, the rationality of multiple linear regression equations was proved. The research results indicated: (1) the volumetric weight changes from 16.13kN/m<sup>3</sup> to 12.53kN/m<sup>3</sup>, the Internal friction angle is between 27.07° and 14.82°, and the cohesion varies from 31kPa to 2.3kPa, the parameters meet the similar requirements of the surrounding rock (grade ⅳ and ⅴ) and clay; (2) The values of Multiple R values (all greater than 0.88) and the Significance F value (all close to 0) proves the three regression equations were valid; (3) Combining the three regression equations and particle size of quartz sand, the mass ratio between fumed silica and fused quartz and geometry similarity constant were solved. All the conclusions mentioned could provide theoretical support and data reference for transparent soil model test implementation.</p>
Data from: PMMA bone cement with L-Arginine/nano fish bone nanocomplex to generate apatite formation
<p>This study observed apatite growth in nano fish bone (NFB) processed from fish bone waste and used it in Polymethyl methacrylate (PMMA) bone cement. PMMA was synthesized using the emulsion polymerization method, and the content of the sodium dodecyl sulphate (SDS) surfactant was varied to control particle size and uniformity. Apatite growth is an approach for bone regeneration to optimize bone repair and restore bone function. Generally, this property is attributed to hydroxyapatite, which can be derived from fish bone waste. PSA characterization showed that the addition of SDS could reduce the particle size from 102.8 nm without SDS to 42.1 nm with 5 wt% SDS. SEM characterization revealed agglomeration due to the very small particle size at a 5 wt% SDS addition. The addition of NFB to PMMA produced bone cement with a 1.65 Ca:P content ratio and an average particle size of 757.5 nm. L-Arginine was also added to PMMA to increase the biocompatibility and antibiotic properties of the bone cement. Tensile strength tests were conducted on the bone cement samples. The BC-PMMA-1-NFB/L-Arg sample exhibited better tensile strength than commercial PMMA. The immersion test showed an increase in mass after seven days of immersion in the SBF solution, indicating the possibility of forming an apatite layer.</p>
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.