Article
Dentistry, Oral Surgery & Medicine
Eugenio Pedulla, Naji Kharouf, Simone Caruso, Giusy Rita Maria La Rosa, Hamdi Jmal, Youssef Haikel, Davide Mancino
Summary: This study aimed to evaluate the torsional, dynamic, and static cyclic fatigue resistance of different endodontic instruments. Results showed that One RECI had the highest cyclic fatigue resistance and rotation angle among the tested instruments. WaveOne Gold exhibited good torsional resistance. In the dynamic tests, One RECI and WaveOne Gold had longer fatigue time compared to One Curve and ProTaper Next X2.
JOURNAL OF ENDODONTICS
(2022)
Article
Chemistry, Multidisciplinary
Hoang-Lan-Anh Le, Thuan-Loc Tran, Thu-Thuy Nguyen, Tran-Lan-Khue Pham, Van-Khoa Pham
Summary: The study aimed to measure the number of cycles leading to fracture (NCF) in stainless steel double-curved canals under static and dynamic cyclic fatigue situations at body temperature. Different groups of ProTaper Universal and ProTaper Next instruments were tested using proprietary programs and the rotations before fracture were recorded. The results showed that ProTaper Next had the highest NCF in dynamic cycles, while ProTaper Universal had the lowest NCF in static condition. The study suggests that factors such as rotation modes, materials, and design influence the cyclic fatigue resistance of the instruments.
APPLIED SCIENCES-BASEL
(2023)
Review
Energy & Fuels
Zidong Zhao, Ping Chang, Guang Xu, Quan Xie, Apurna Ghosh
Summary: This study summarized four surfactants' evaluating methods for coal dust suppression, compared the consistency and discrepancy between static and dynamic test results, and found that the efficacy of surface tension testing can vary under different conditions.
Article
Dentistry, Oral Surgery & Medicine
Rashid El Abed, Aisha Alshehhi, Yoo Jung Kang, Dana Al Raeesi, Amar H. Khamis, Mohamed Jamal, Hyeon-Cheol Kim
Summary: This study evaluated the dynamic cyclic fatigue resistance of heat-treated nickel-titanium files after usage and autoclaving. The results showed that the cyclic fatigue resistance of the files may decrease after usage, and further decrease after sterilization.
JOURNAL OF ENDODONTICS
(2022)
Article
Engineering, Civil
Vladimir Rodriguez-Moreno, Hector Guerrero, J. Alberto Escobar, Amador Teran-Gilmore
Summary: Since the 2017 Puebla-Morelos Earthquake, there has been a significant increase in interest in limiting damage to structural components in Mexico. This paper focuses on studying a passive energy dissipation device called a slit damper, which has been found to be cost-effective and easy to apply. The damper demonstrates stable hysteretic behavior and is capable of dissipating substantial amounts of energy while maintaining less ductile elements elastic.
ENGINEERING STRUCTURES
(2023)
Review
Engineering, Chemical
Erik J. G. Sewalt, Fuweng Zhang, Volkert van Steijn, J. Ruud van Ommen, Gabrie M. H. Meesters
Summary: This review discusses various experimental methods for measuring material stickiness, classifying them into static and dynamic stickiness tests. Static tests are useful for predicting long-term behavior of powder during storage, while dynamic tests have significant impact on the design and operation of powder production and processing equipment. Future research should focus on developing test methods that determine the onset of stickiness using a liquid droplet as a starting point.
KONA POWDER AND PARTICLE JOURNAL
(2021)
Article
Engineering, Mechanical
Yunqi Liu, Ruilin Liu, Zongtao Zhu, Yuanxing Li, Hui Chen
Summary: The primary focus of this study was to investigate the fracture mechanism of aluminum/steel laser-arc welded-brazed joints under different loading conditions. The use of Digital Image Correlation (DIC) allowed for the recording of the fracture process during tensile and fatigue tests, while the Finite Element Method (FEM) was used to analyze stress distributions. The results showed that the weld reinforcement improved the mechanical properties of the joints and enhanced fatigue properties. The study highlighted the importance of understanding the fracture mechanism for developing reliable aluminum/steel structures.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Construction & Building Technology
Ahmed Moussa, Hany El Naggar, Abouzar Sadrekarimi
Summary: The study focuses on the dynamic characteristics of granulated rubbers under cyclic loading, revealing the importance of understanding their behavior under different stress levels. The shear modulus and damping ratio are crucial parameters for evaluating the material performance and suitability in civil engineering applications. The comparison between cyclic triaxial and cyclic simple shear tests provides insights into the dynamic properties of granulated rubber and their independence from vertical consolidation stress.
Article
Materials Science, Multidisciplinary
Qingjuan Wang, Congcong Yang, Jincheng Wu, Beite Gao, Zeen He, Kuaishe Wang
Summary: The microstructural evolution and orientation relationship of Ti-1023 alloy under static heat treatment and dynamic thermo-mechanical coupling at 750 degrees C were investigated. The results showed that under the thermo-mechanical coupling conditions, the spherical a phase precipitated at grain boundaries and low-angle grain boundaries, increasing its volume fraction. On heat treatment, the alpha phase at the grain boundaries became discontinuous in a strip-like shape, while within the grain it appeared needle-like. The grain-boundary a phase became more continuous as the heat treatment duration was extended.
MATERIALS CHARACTERIZATION
(2022)
Article
Multidisciplinary Sciences
Hajir Al-musawi, Elisa Manni, Alexander Stadlmann, Bernhard Ungerer, Mojtaba Hassan Vand, Olaf Lahayne, Riccardo Nobile, Georg Baumann, Florian Feist, Ulrich Muller
Summary: Wood has potential to be used in high-performance applications like electric vehicle battery cases due to its renewable nature and excellent mechanical properties. This study characterized the mechanical and elastic properties of thermally modified and unmodified beech and birch wood under different treatment conditions. The results showed that moderate temperature treatment improved the strength and stiffness of the wood, but higher temperatures caused a decrease in these properties. Nitrogen treatment was found to have a more pronounced effect compared to air treatment, and beech wood exhibited a greater decrease in performance compared to birch wood. Tension-compression asymmetry was observed in both wood species, with higher Young's moduli obtained from tensile tests. The shear moduli obtained from ultrasound measurements were comparable to quasi-static tests for birch wood, but there was an overestimation for beech wood. The Saint-Venant model successfully predicted the shear moduli of beech wood.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Geological
Chunyong Jiang, Xuanming Ding, Huaqiang Fang, Jing Lian
Summary: Research has found that coral silt, a type of coral soil with over 50% silt content, is formed during land reclamation. The cyclic dynamic shear characteristics of coral silt are important for determining the seismic safety of reef infrastructures due to the frequent action of waves, wind, earthquakes, and other dynamic loads. Symmetrical and asymmetrical cyclic simple shear tests were conducted to investigate the cyclic behavior of coral silt, with emphasis on the static-cyclic shear stress coupling. Empirical formulas were proposed to estimate the undrained peak shear strength and critical state strength in monotonic simple shear tests. The CSR threshold value, ranging from 0.05 to 0.075, controlled the final failure in both symmetrical and asymmetrical-loading cyclic simple shear tests. The cyclic shear stress had a significant influence on the cyclic deformation, cyclic pore water pressure, cyclic strength, and cyclic shear modulus of coral silt.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Construction & Building Technology
Runqing Liu, Wei Wang, Dingwen Qi, Yuanquan Yang
Summary: The incorporation of metakaolin improves the workability and mechanical properties of magnesium phosphate cement (MPC) and extends its setting time. It enhances the static and dynamic mechanical properties of MPC at high temperatures and improves its impact resistance. The main hydration products of MPC with metakaolin are struvite, unreacted MgO, aluminum phosphate, and possibly amorphous substance containing aluminum.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ji-Hoon Jang, Youngsin Choi, Kyung-Hwan Jung, Hyung-Giun Kim, Dong-Geun Lee
Summary: This study used a high laser power as the heat source in a selective laser melting (SLM) technique to effectively additive manufacture a Ti-6Al-4V alloy. By changing the energy density among the SLM process conditions, the study aimed to control defects and improve the quasi-static mechanical properties. The results showed that increasing the energy density led to an increase in the acicular alpha ' martensite fraction and improved quasi-static mechanical properties.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Analytical
Andrea Karen Persons, Carver Middleton, Erin Parker, Will Carroll, Alana Turner, Purva Talegaonkar, Samaneh Davarzani, David Saucier, Harish Chander, John E. Ball, Steven H. Elder, Chartrisa LaShan Simpson, David Macias, Burch V. F. Reuben
Summary: Motion capture is the current gold standard for assessing human body movement, but it has limitations in mimicking natural terrains and movements. To overcome this, researchers are developing a smart sock with stretch sensors to record movement data outside the laboratory. Tests of the stretch sensors show that there is a consistent upward drift of capacitance in fatigued sensors, suggesting the need for further research on pre-stretching the sensors and stabilizing the drift.
Article
Multidisciplinary Sciences
Lisa Bjerregaard Jorgensen, Hans Malte, Michael Orsted, Nikolaj Andreasen Klahn, Johannes Overgaard
Summary: Temperature tolerance is crucial for defining the fundamental niche of ectotherms. Researchers use static or dynamic assays to assess tolerance, but comparisons between studies are complicated due to the different methods used. A mathematical model is presented here to reconcile thermal tolerance measures from static and dynamic assays, based on the exponential increase of thermal injury accumulation rate with temperature. This model has promising applications for analyzing ectotherm thermal tolerance.
SCIENTIFIC REPORTS
(2021)
Article
Dentistry, Oral Surgery & Medicine
E. Nagas, Z. C. Cehreli, M. O. Uyanik, P. K. Vallittu, L. V. J. Lassila
INTERNATIONAL ENDODONTIC JOURNAL
(2016)
Article
Engineering, Chemical
Ayhan Eymirli, Ozgur Uyanik, Emre Nagas, Semra Calt Tarhan
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2017)
Article
Engineering, Chemical
Emel Uzunoglu, Sevinc Aktemur Turker, M. Ozgur Uyanik, Emre Nagas
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2016)
Article
Surgery
Ayhan Eymirli, Emre Nagas, Mehmet Ozgur Uyanik, Zafer Cavit Cehreli
PHOTOMEDICINE AND LASER SURGERY
(2017)
Article
Surgery
Emre Nagas, Selen Kucukkaya, Ayhan Eymirli, Mehmet Ozgur Uyanik, Zafer Cavit Cehreli
PHOTOMEDICINE AND LASER SURGERY
(2017)
Article
Dentistry, Oral Surgery & Medicine
S. Kucukkaya Eren, H. Aksel, O. Uyanik, E. Nagas
OPERATIVE DENTISTRY
(2018)
Article
Dentistry, Oral Surgery & Medicine
Ozgur Uyanik, Emre Nagas, Selen Kucukkaya, Zafer C. Cehreli, Pekka K. Vallittu, Lippo V. J. Lassila
AUSTRALIAN ENDODONTIC JOURNAL
(2019)
Article
Anatomy & Morphology
Hacer Aksel, Elifcan Arslan, Nuhan Purali, Ozgur Uyanik, Emre Nagas
MICROSCOPY RESEARCH AND TECHNIQUE
(2019)
Article
Dentistry, Oral Surgery & Medicine
Ahmet Keles, Emel Uzunoglu Ozyurek, Mehmet Ozgur Uyanik, Emre Nagas
JOURNAL OF ENDODONTICS
(2019)
Article
Dentistry, Oral Surgery & Medicine
Ayhan Eymirli, Derya Deniz Sungur, Ozgur Uyanik, Nuhan Purali, Emre Nagas, Zafer C. Cehreli
JOURNAL OF ENDODONTICS
(2019)
Article
Dentistry, Oral Surgery & Medicine
Ahmet Keles, Sevinc Askerbeyli Ors, Nuhan Purali, Selen Kucukkaya Eren
Summary: The aim of this study was to evaluate the influence of different activation techniques on dentin tubule penetration of root canal sealer. The results showed that XP-Endo Finisher had the highest penetration at 50 μm and similar penetration to EDDY at 100 and 200 μm, but higher penetration than the other groups. At 500 μm, XP-Endo Finisher had higher penetration than EndoActivator. Therefore, XP-Endo Finisher can be recommended for activation during sealer placement for better penetration into dentin tubules.
AUSTRALIAN ENDODONTIC JOURNAL
(2023)
Article
Dentistry, Oral Surgery & Medicine
Emel Uzunoglu, Ayhan Eymirli, Mehmet Ozguer Uyanik, Emre Nagas, Zafer Cavit Cehreli
AUSTRALIAN ENDODONTIC JOURNAL
(2018)
