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4481
Preparing a New Type of Concrete Based on Sulfur-melamine Modifier
Published 2024-03-01“…The new sulfur-melamine modifier was fabricated, and its fabrication was confirmed by IR spectroscopy and TG analysis. The surface morphology resulted from this modifier was studied by SEM and EDS analysis. …”
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4482
Molecular Evolution of H2O:O2 Ices at Different Temperatures in Simulated Space Environments. I. Chemical Kinetics and Equilibrium
Published 2025-01-01“…Curiously, we observe that the average ERCs for bimolecular collisions decrease by half as the ice temperature increases, varying from 5.8e-25 to 2.9e-25 cm ^3 molecules ^−1 s ^−1 for the ices studied. …”
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4483
Minimizing skull defects in retrosigmoid approach: precision mapping of the sigmoid sinus with mastoid emissary vein canal
Published 2024-12-01“…The projection of the internal opening of the MEV canal onto the external surface of the mastoid process was determined as the posterior border sigmoid sinus and anterior border for craniotomy. …”
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4484
Exploring NRB Biofilm Adhesion and Biocorrosion in Oil/Water Recovery Operations Within Pipelines
Published 2024-10-01“…A comprehensive suite of experimental and analytical techniques, including microbial analysis, gravimetric methods, and surface characterization, were employed to elucidate the mechanisms of microbially influenced corrosion (MIC). …”
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4485
Preparation of the high compressive performance special-shaped Csf/AZ91D composite part using the liquid-solid extrusion following vacuum pressure infiltration process
Published 2025-04-01“…The results show that the forward forming scheme provides the special-shaped fiber preform with no surface defects. For the Csf/AZ91D part, its internal microstructures show that the infiltration of liquid magnesium is sufficient and uniform. …”
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4486
Synthesis and cytotoxicity analysis of fatty acid-mediated maghemite nanoparticles in cancerous and normal cells
Published 2025-07-01“…FE-SEM and TEM images revealed semi-spherical and cuboidal particles with an average size of 14 nm. EDS analysis confirmed the presence of iron, oxygen, carbon, and gold elements. …”
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4487
Analysis of spatial equilibrium and obstacle factors of water resources in the Pearl River Basin
Published 2025-01-01“…Results from 2017 to 2022 show that inter-regional differences have dominated the spatial equilibrium gaps, with an average contribution rate of 52.77%. Specifically, Xijiang's plateau and mountain terrain cause severe surface water seepage, keeping its water utilization rate below 40%. …”
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4488
Reconstructed glacier area and volume changes in the European Alps since the Little Ice Age
Published 2025-02-01“…The glacier area shrunk from 4244 km<span class="inline-formula"><sup>2</sup></span> at the LIA maximum to 1806 km<span class="inline-formula"><sup>2</sup></span> in 2015 (<span class="inline-formula">−57</span> %), and volume was reduced from about 280 <span class="inline-formula">±</span> 43 km<span class="inline-formula"><sup>3</sup></span> around 1850 to 100 <span class="inline-formula">±</span> 17 km<span class="inline-formula"><sup>3</sup></span> (<span class="inline-formula">−64</span> %) in 2015, roughly in line with previous estimates. On average, glacier surfaces lowered by <span class="inline-formula">−43.6</span> m until 2015 (<span class="inline-formula">−0.26</span> m a<span class="inline-formula"><sup>−1</sup></span>), which is 3 times less than observed over the 2000 to 2015 period (<span class="inline-formula">−0.82</span> m a<span class="inline-formula"><sup>−1</sup></span>). …”
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4489
Advances in research on noble gas as tracers of geofluids and helium enrichment
Published 2025-06-01“…The crust-derived helium flux in the Lhasa block shows a theoretical value 221 to 78 056 times the global average, with numerical simulations yielding 6 392 to 9 284 times, establishing this block as an ideal region for helium accumulation. …”
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4490
Optimized and novel synthesis of AgI nanoparticles for efficient cloud seeding processes
Published 2025-09-01“…Based on transmission electron microscopy (TEM) analysis, the average size of synthesized AgI nanoparticles was approximately 23 nm. …”
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4491
Green-Synthesized Silver Nanoparticle-Loaded Antimicrobial Films: Preparation, Characterization, and Food Preservation
Published 2025-07-01“…The synthesis time, temperature, and concentration of AgNO<sub>3</sub> were considered using a central composite design coupled with response surface methodology to obtain the optimum AgNPs (2 h, 75 °C, 2 mM). …”
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4492
Automatic maxillary sinus segmentation and age estimation model for the northwestern Chinese Han population
Published 2025-02-01“…Results The automatic segmentation model achieved high accuracy, which yielded a Dice similarity coefficient (DSC) of 0.873, an Intersection over Union (IoU) of 0.7753, a Hausdorff Distance 95% (HD95) of 9.8337, and an Average Surface Distance (ASD) of 2.4507. The regression model performed best, with mean absolute errors (MAE) of 1.45 years (under 18) and 3.51 years (aged 18 and above), providing relatively precise age predictions. …”
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4493
Determination of the Installation Efficiency of Vertical Stationary Photovoltaic Modules with a Double-Sided “East–West”-Oriented Solar Panel
Published 2025-02-01“…However, these installation options have a “mirror” value of the cosines of the Sun’s rays falling on the surface of the PV-modules and can have values from 0.917 to 1. …”
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4494
Electromyogram based muscle stress estimation of Gastrocnemius medialis using Machine learning algorithms
Published 2025-03-01“… Surface electromyography (sEMG) is the primary technique for recording muscle activity by capturing the electrical signal from the muscles. …”
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4495
Facile exfoliation of natural talc into separated mesoporous magnesium silicate nano-sheets for effective sequestration of phosphate and nitrate ions: characterization and advanced...
Published 2025-04-01“…Magnesium silicate nano-sheets were synthesized from natural talc by facile exfoliation and delamination methods as exfoliated product (EXTC) of 29.5 nm average pore diamter, enhanced surface area (103 m2/g), and adsorption perforamnces. …”
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4496
ANALYSIS OF AGRICULTURAL HOLDINGS IN ROMANIA IN TERMS OF SIZE
Published 2020-01-01“…According to statistics, Romania is in the last place when it comes to the average of the agricultural surfaces used by agricultural holdings. …”
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4497
A tailored distractor-assisted percutaneous minimally invasive treatment for Sanders II and III calcaneus fractures: a consecutive cohort study with medium-term results
Published 2025-08-01“…Anatomical or near-anatomical realignment of the posterior subtalar articular surfaces were achieved in all cases. At the last follow-up, the AOFAS and the VAS score was average 81.4 and 1.3 points, both significantly improved from that of pre-operation (p < 0.05, respectively). …”
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4498
Multi-observatory Study of Young Stellar Energetic Flares (MORYSEF): No Evidence for Abnormally Strong Stellar Magnetic Fields after Powerful X-Ray Flares
Published 2025-01-01“…We explore the empirical power-law relationship between X-ray luminosity ( L _X ) and total surface magnetic flux (Φ), established across solar magnetic elements, time- and disk-averaged emission from the Sun, older active stars, and pre-main-sequence (PMS) stars. …”
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4499
The glaciers of the Dolomites: the last 40 years of melting
Published 2025-03-01“…SfM on historical aerial imagery is used for previous decades. We found an average cumulative surface elevation change of <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M3" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">28.7</mn><mo>±</mo><mn mathvariant="normal">2.6</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="58pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="ae76e61c7e7006e25f90b9a3225e2eee"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-19-1335-2025-ie00001.svg" width="58pt" height="10pt" src="tc-19-1335-2025-ie00001.png"/></svg:svg></span></span> <span class="inline-formula">m</span> from 1980s to 2023, 33 <span class="inline-formula">%</span> of which occurred between 2010–2023. …”
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4500
Large-Eddy Simulation of Dry and Moist Atmospheric Boundary Layers and Analysis of the Model Convergence
Published 2024-12-01“…By using the large eddy simulation (LES) version of the Weather Research and Forecasting (WRF) model, vertical structure and the feature of turbulent transportation of shallow-convective-cloud-topped atmospheric convective boundary layer was simulated in addition to the idealized dry convective boundary layer on oceanic surface.Numerical convergence of LES model was analyzed with the model results in different resolutions.The results showed that the dry convective boundary layer was vigorous.Approximately 1.15 km of the planetary boundary layer height was simulated with the LES in different resolutions.Vertical uniform structure of the averaged potential temperature (θ), mixing ratio of water vapor (qv) and horizontal wind (u and v) were shown in the idealized dry convective boundary layer but with large vertical gradients in the near surface layer and the top of the boundary layer.Higher resolution model resolved more detailed structure of convective bubbles within the dry convective boundary layer, larger variance of potential temperature in the entrainment layer, vertical uniform distribution of the averaged quantities within the simulated mixed layer extending more closing to the surface, and the errors in LES model under coarse resolution were mainly concentrated in the lower boundary layer and near the inversion layer.The higher resolution LES model showed larger resolved sensible heat flux while the total flux remained.In the case of shallow-convective-cloud-topped boundary layer, obvious different boundary layer structure was displayed in comparison with that of the dry convective boundary layer.Conditionally unstable layer existed over the mixing layer, and mixing layer height dropped.Vertical profiles of averaged θ, qv, u and v showed similar structure in the mixing layer as that in the convective boundary layer.The averaged meteorological quantities in the lower mixing layer were uniformly distributed in vertical direction.In the cloudy layer, however, positive heat flux and vertical turbulent kinetic energy appeared.Negative heat flux was observed from the top of mixing layer to the lower cloudy layer, which reflected the weak inverse temperature and entrainment at top of mixing layer.Lower-resolution model simulated more deviations of the top of temperature inversion, and mean wind velocity and fluxes near surface.The large eddy simulation model tended to converge at 40 m resolution in the vigorously developing dry convective boundary layer case while it converged at 30 m resolution in the shallow-convective-cloud-topped boundary layer.The atmospheric boundary layer with lower mixing layer height needs to be simulated using a higher resolution LES model.…”
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