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Bearing characteristics and damage rules of regenerated rock mass.
Sci Rep
January 2025
Dazhu Coal and Electricity Group of Sichuan, Xiaohezui Coal Mine, Dazhou, 6635000, China.
This study investigates the bearing characteristics and damage evolution of regenerative rock masses formed under varying geological conditions through uniaxial loading tests, numerical simulations, and theoretical derivations. Regenerative rock mass samples with different water-cement ratios and cementing materials were prepared, and the mechanical behavior during the loading process was analyzed. The results indicate that the secondary damage process can be divided into three stages: pre-peak, weakening, and friction.
View Article and Find Full Text PDFNumerical Study on the Shear Behavior of a Late-Model Cold-Formed Stainless Steel C-Shaped Beam.
Materials (Basel)
December 2024
Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China.
The failure mode of thin-walled C-channel beams typically manifests as premature local buckling of the compression flange, leading to insufficient utilization of material strength in both the flange and the web. To address this issue, this study adopts the approach of increasing the number of bends to reinforce the flange and adding V-shaped stiffeners in the middle of the web to reduce the width-to-thickness ratio of the plate elements, thereby delaying local buckling and allowing for greater plastic deformation. However, the challenge lies in the irregular cross-sectional shape and complex buckling patterns.
View Article and Find Full Text PDFIschaemic stroke due to thrombus formation on the ventricular side of the mitral valve more than one year after MitraClip implantation: a case report.
Acta Cardiol
January 2025
Cardiology, AZ Groeninge, Kortrijk, Belgium.
Objectives: Edge-to-edge mitral valve repair with MitraClip leads to a differed flow pattern and a decreased flow velocity at the left ventricle apex. This combination may lead to initiation of thrombus formation, especially in patients with severely reduced ejection fraction. The prevalence and mechanism of left ventricular thrombus formation after MitraClip implantation is still unknown.
View Article and Find Full Text PDFBond strength comparison of chemically activated hard reline materials on CAD-CAM milled and conventional heat-polymerized PMMA denture bases.
J Prosthet Dent
January 2025
Assistant Professor, Department of Prosthodontic, College of Dental Medicine, Rangsit University, Phatum Thani, Thailand. Electronic address:
Statement Of Problem: Comprehensive data are needed on the performance of chemically activated, chairside hard reline materials when used with computer-aided design and computer-aided manufacturing (CAD-CAM) milled polymethyl methacrylate (PMMA) denture bases and conventionally processed bases. This lack of data affects decisions regarding the chairside reline material to be used for improving the fit and retention of relined complete dentures.
Purpose: The purpose of this in vitro study was to evaluate and compare the shear bond strength (SBS) of 3 chemically activated, chairside hard reline materials on CAD-CAM milled and conventional heat-polymerized PMMA denture bases.
Risk factors for mortality after 3-column osteotomy.
Eur Spine J
December 2024
Division of Spine Surgery, Department of Orthopaedics, University of Maryland Medical Center, 110 South Paca Street, Suite 300, Baltimore, MD, 21201, USA.
Purpose: Three-column osteotomies (3COs), such as pedicle subtraction osteotomy (PSO) and vertebral column resection (VCR), are used to surgically correct rigid adult spinal deformity (ASD). While extensive research exists about complications associated with 3COs, there remains a paucity of studies analyzing risk factors for mortality following 3CO. We believe the mortality rate after 3-column osteotomy will be low with specific identifiable demographic or medical risk factors.
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