Despite the fact that densified mixture design algorithm (DMDA) has been identified as a promising tool for green concrete mix design, its use in real practice has still been minimal worldwide. Due to the lack of prec...
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Statement of problem: Various strategies have been proposed to reduce the cement space of foundation restorations for endodontically treated teeth. However, they may add more operative steps, or the dentist must keep ...
Statement of problem: Various strategies have been proposed to reduce the cement space of foundation restorations for endodontically treated teeth. However, they may add more operative steps, or the dentist must keep different sizes of drills and posts in stock. A 2-piece universal adjustable post system has been developed to overcome this problem, but whether the system has acceptable fatigue survival performance is unclear. Purpose: The purpose of this in vitro study was to evaluate the fatigue survival and stress distribution of endodontically treated teeth without a ferrule and restored with different glass fiber post strategies versus a recently introduced universal 2-piece fiber post system. Material and methods: Bovine incisor roots were randomly assigned to 3 groups as per the post used (n=13): adapted glass fiber post with post space preparation of the same size, composite resin-custom glass fiber post (CTM), and universal 2-piece glass fiber-reinforced composite resin post (UNI). The posts were adhesively luted, the composite resin core was added, and a composite resin crown was produced with computer-aided design and computer-aided manufacturing (CAD-CAM), and then adhesively luted to each core. A fatigue test was performed with the stepwise stress method (10 000 cycles/step;20 Hz;load=100 N to 750 N;step=50 N) until fracture, and the failure mode analyzed. The stress distribution was evaluated by finite element analysis with the maximum principal stress criteria by following the parameters of the in vitro test. The solids were considered homogeneous, linear, and isotropic, except for the glass fiber post (orthotropic), and a load of 450 N at 30 degrees was applied. The fatigue failure load and the number of cycles for failure were analyzed with Kaplan-Meier and Mantel-Cox (log rank test) (α=.05). The finite element analysis results were analyzed with colorimetric graphs. Results: The highest fatigue failure load and the number of cycles for failure were
Top commodities are those that can stimulate growth or development in other sectors, both of which supply inputs and use output in the production process. Leading commodities have high rates of economic growth, relati...
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This work studies the behavior of hot-dipped galvanized steel against chloride corrosion and its effect on its bond strength to concrete. Two steel diameters were adopted and bond strength was assessed using a standar...
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Considering the importance of polyphenol intake in reducing the risk of non-communicable chronic diseases, it is essential to encourage populations around the world, especially in Brazil, to consume foods that increas...
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The residents of the floating village of Malahing, Bontang, East Kalimantan, earn their living as fish catching fishermen and seaweed farming. Residents even experience a clean water crisis, every month they require a...
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Bakanae disease,caused by Fusarium fujikuroi,poses a significant threat to rice production and has been observed in most rice-growing *** disease symptoms caused by different pathogens may vary,including elongated and...
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Bakanae disease,caused by Fusarium fujikuroi,poses a significant threat to rice production and has been observed in most rice-growing *** disease symptoms caused by different pathogens may vary,including elongated and weak stems,slender and yellow leaves,and dwarfism,as *** disease is likely to cause necrosis of diseased seedlings,and it may cause a large area of infection in the field through the transmission of ***,early disease surveillance plays a crucial role in securing rice *** monitoring methods are both time-consuming and labor-intensive and cannot be broadly *** this study,a combination of hyperspectral imaging technology and deep learning algorithms were used to achieve in situ detection of rice seedlings infected with bakanae *** data were obtained on the 9th,15th,and 21st day after rice infection to explore the physiological and biochemical performance,which helps to deepen the research on the disease *** data were obtained over these same periods of infection,and a deep learning model,named Rice Bakanae Disease-Visual Geometry Group(RBD-VGG),was established by leveraging hyperspectral imaging technology and deep learning *** on this model,an average accuracy of 92.2%was achieved on the 21st day of *** also achieved an accuracy of 79.4%as early as the 9th *** characteristic wavelengths were extracted to increase the feasibility of using portable spectral equipment for field ***,the model offers an efficient and non-destructive surveillance methodology for monitoring bakanae disease,thereby providing an efficient avenue for disease prevention and control.
作者：
Pedrini, Luiz Felipe K.de Andrade Scalvi, Luis Vicente
School of Sciences POSMAT - Post-Graduate Program in Materials Science and Technology SP Bauru Brazil
School of Sciences Department of Physics SP Bauru Brazil
A dip-coating process is proposed for preparation of TiO2 thin films from a segregated fluid system. To study its effects, by changing the height of the floating, less dense phase, it was possible to modify the main d...
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Airport runway designs must consider wind climatology to reduce the potential for crosswind and tailwind events that can cause accidents and aircraft delays. The large potential of crosswind and tailwind on a runway a...
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Disaster forensic approaches aim to identify the causes of disasters to support disaster risk ***,few studies have conducted a systematic literature review of scientific articles that labeled themselves as a forensic ...
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Disaster forensic approaches aim to identify the causes of disasters to support disaster risk ***,few studies have conducted a systematic literature review of scientific articles that labeled themselves as a forensic approach to *** article provides a qualitative analysis of these forensic studies,focusing on five main issues:(1)the methodologies applied;(2)the forensic approaches used in the disaster risk management phases;(3)the hazards addressed;(4)if the methodologies involve social participation,and using what types of participation;and(5)if there are references to urban planning in the scientific studies *** results showed a predominance of the Forensic Investigations of Disasters(FORIN)and post-Event Review Capability(PERC)methodologies used in isolation or *** is a need for methodologies that engage people in participatory FORIN,fostering the co-production of knowledge and action research approaches.
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