Results 81 to 90 of about 13,527 (256)

A new, ~4500‐year varve record and high‐resolution tephrochronology from lake Hämälänlampi, eastern Finland, provides age constraints for the Furnas C and the Glen Garry/Askja A‐2000 eruptions

Journal of Quaternary Science, EarlyView.
ABSTRACT The northern European distal cryptotephra framework is constantly developing both in terms of identification of new tephra horizons and improved age constraints for the already well‐established tephra marker horizons. However, many prehistoric tephra layers have only been dated by the radiocarbon method, with its inherent problems.
Maarit Kalliokoski, Veera Erola, Saija Saarni   +2 more
wiley   +1 more source

Comparison of glass ionomer cement and resin as sealing materials: Systematic review of clinical trials [PDF]

Balkan Journal of Dental Medicine
Background/Aim: Glass ionomer cements (GIC) are regarded to be an alternative sealing material to Composite Resin (CR), the gold standard of sealing. The aim of this systematic review is to evaluate Glass Ionomer Cements (GIC) in comparison with Resin ...
Karadimitriou Maria-Despoina, Alexaki Filothei, Dermata Anastasia   +2 more
doaj   +1 more source

Numerical Fatigue Analysis for Crack Propagation on Ti6Al4V Panel Using XFEM Method

Macromolecular Symposia, EarlyView.
ABSTRACT The aim of this work is the validation of a numerical model based on the XFEM method for the prediction of crack propagation in mechanical components subjected to cyclic loads. Through careful bibliographic research, it was decided to take as a case study the analysis of the propagation of a crack passing through a panel in an additive ...
Ciro Coscione, Francesco Caputo, Giuseppe Lamanna   +2 more
wiley   +1 more source

High Relative Accuracy Computations With Covariance Matrices of Order Statistics

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT In many statistical applications, numerical computations with covariance matrices need to be performed. The error made when performing such numerical computations increases with the condition number of the covariance matrix, which is related to the number of variables and the strength of the correlation between the variables. In a recent work,
Juan Baz, Pedro Alonso, Juan Manuel Peña, Raúl Pérez‐Fernández   +3 more
wiley   +1 more source

In Vitro Analysis of Compressive Strength of Three Different Aesthetic Restorative Materials

Journal of Pharmacy and Bioallied Sciences
Aim: The study aims to assess and contrast the compressive strengths of three aesthetically pleasing restorative materials. Materials and Methods: Using metallic molds, 30 pellets were created, then split into 3 groups of 10, each meeting the required ...
Rohit Nagar, Simone Grandini, Carlo Gaeta, Sumit Dubey, Niladri Maiti, Madhura Avinash Jadhav, Neerieza Konthoujam   +6 more
doaj   +1 more source

Modificación superficial de un acero AISI SAE 1045 mediante la implantación de iones de nitrógeno y titanio

Iteckne, 2011
Los constantes avances tecnológicos han permitido generar técnicas para la protección superficial de materiales expuestos en medios agresivos; por ello el Grupo de Investigación en Tecnología del Plasma y Corrosión (FITEK) junto con el Grupo de ...
ELy Dannier Valbuena Niño, Deicy Viviana Salinas, Darío Yesid Peña, Luisa Fernanda Chinchilla   +3 more
doaj   +1 more source

Prediction of In‐Plane Shear Mechanical Properties Through Degree of Bonding Characterization as a Function of Automated Fiber Placement Processing Parameters for Carbon Fiber/PEKK Composite Laminates

Polymer Composites, EarlyView.
Graphical abstract demonstrating manufacturing process and property characterization used in process modelling of interlaminar behavior across the range of process parameters. ABSTRACT Automated Fiber Placement (AFP) of fiber‐reinforced thermoplastic tapes enables rapid manufacturing by leveraging precise robotic lamination and in situ consolidation ...
Abd‐Elrahman Korayem, Chandra Kishore Reddy Emani, Saratchandra Kundurthi, Karthik Venkatesan, Si Chen, Javed Mapkar, Mahmoodul Haq   +6 more
wiley   +1 more source

Dexamethasone impact on vimentin in human lens epithelial cells

Офтальмохирургия, 2016
Purpose. To study the expression of vimentin on the impact of dexamethasone (Dex) in human lens epithelial cells (HLECs), and the role of vimentin expression in steroid-induced cataract (GIC) formation.Material and methods. HLECs were exposed to DMEM and 
Su Sheng, Ge Jia-Jia, Liu Ping
doaj  

Characterizing the distribution of extreme geoelectric field events in Sweden

Journal of Space Weather and Space Climate
Historically, Sweden has reported several impacts on transformers and transmission lines related to geomagnetically induced currents (GICs) that develop during strong space weather events. GICs are driven by the geoelectric field (E), and their intensity
Lanabere Vanina, Dimmock Andrew P., Rosenqvist Lisa, Viljanen Ari, Juusola Liisa, Johlander Andreas   +5 more
doaj   +1 more source

Effects of Cooling Rates on Self‐Reinforced Polyethylene Composites via Multiscale Experimental Characterizations

Polymer Composites, EarlyView.
(top) fabrication and multi‐scale characterizations of self‐reinforced polyethylene composites (PE‐SRCs); (bottom) effects of cooling rates on mechanical properties and crystal morphologies of PE‐SRCs. ABSTRACT This study investigates cooling rate effects on self‐reinforced polyethylene composites (PE‐SRCs), focusing on macroscopic thermal and ...
Yelin Ni, Yao Qiao, Logan Kearney, Raveen John, Dounia Boushab, Ethan Nickerson, Amit Naskar, Kevin Simmons   +7 more
wiley   +1 more source