Results 31 to 40 of about 15,963,312 (351)

The mechanical properties of thin alumina film deposited by metal-organic chemical vapour deposition [PDF]

, 1995
Amorphous alumina films were deposited by metal-organic chemical vapour deposition (MOCVD) on stainless steel, type AISI 304. The MOCVD experiments were performed in nitrogen at low and atmospheric pressures. The effects of deposition temperature, growth
Fransen, T., Gellings, P.J., Haanappel, V.A.C., Haanappel, V.A.C., Metselaar, H.S.C., van Corbach, H.D., van de Vendel, D.   +6 more
core   +3 more sources

Solid particle erosion and viscoelastic properties of thermoplastic polyurethanes [PDF]

, 2015
The wear resistance of several thermoplastic polyurethanes (TPUs) having different chemical nature and micronscale arrangement of the hard and soft segments has been investigated by means of erosion and abrasion tests.
ACIERNO, DOMENICO, ARENA, GAETANO, FILIPPONE, GIOVANNI, Friedrich, K., Padenko, E., Russo, P., Wagner, J.   +6 more
core   +3 more sources

Effect of incorporating bioactive glass filler in resin infiltrant on the microhardness of demineralized enamel [PDF]

Journal of Dental Materials and Techniques
Objective: This study aimed to evaluate the effect of incorporating different concentrations of 45S5 bioactive glass (BAG) as a filler into a resin infiltrant on the microhardness of demineralized enamel.Methods: Forty bovine enamel samples were ...
Hila Hajizadeh, Hossein Bagheri, Aboubakr Azizzadeh, Maryam Valizadeh, Kimia Jafarpour   +4 more
doaj   +1 more source

Effect of Morphological Changes due to Increasing Carbon Nanoparticles Content on the Quasi-Static Mechanical Response of Epoxy Resin [PDF]

, 2018
Mechanical failure in epoxy polymer and composites leads them to commonly be referred to as inherently brittle due to the presence of polymerization-induced microcrack and microvoids, which are barriers to high-performance applications, e.g., in ...
Thakur, V. K., Yazdani Nezhad, H.
core   +2 more sources

Hardness and inapproximability results for minimum verification set and minimum path decision tree problems [PDF]

, 2012
Minimization of decision trees is a well studied problem. In this work, we introduce two new problems related to minimization of decision trees. The problems are called minimum verification set (MinVS) and minimum path decision tree (MinPathDT) problems.
Turker, Uraz Cengiz, Türker, Uraz Cengiz, Yenigun, Husnu, Yenigün, Hüsnü   +3 more
core   +1 more source

Avaliação da dureza superficial de cimentos de ionômero de vidro reforçados por nanotubos de carbono

Revista de Odontologia da UNESP
Introdução Os cimentos de ionômero de vidro (CIV) são materiais com baixa resistência à tração e ao cisalhamento, mostrando-se, portanto, contraindicados para áreas sujeitas às grandes cargas oclusais.
Mayra Manoella Perez Reis dos Santos, Ingrid Fernandes Mathias, Michele Baffi Diniz, Eduardo Bresciani   +3 more
doaj   +1 more source

Dental bleaching gels do not alter the surface roughness and microhardness of feldspathic porcelain

RGO: Revista Gaúcha de Odontologia, 2020
Objective: To evaluate whether two different bleaching gels affect the microhardness and surface roughness of feldspathic ceramic specimens, in vitro. Methods: A total of 48 feldspathic porcelain IPS In Line (Ivoclar-Vivadent) discs (16/treatment group)
Danyelle Cambraia Franco de SOUZA, Lisia Aparecida Costa GONÇALVES, Kellen Cristina da Silva GASQUE, Ana Beatriz da Silveira MORETTI, Bruno Franciel DA SILVA, Rafael Tobias MORETTI NETO   +5 more
doaj   +1 more source

A new approach to local hardness

, 2011
The applicability of the local hardness as defined by the derivative of the chemical potential with respect to the electron density is undermined by an essential ambiguity arising from this definition. Further, the local quantity defined in this way does
Ayers, Ayers, Ayers, Ayers, Becke, Becke, Berkowitz, Borgoo, Broadus, Cedillo, Chattaraj, Chattaraj, Chattaraj, Chermette, Clarke, De Proft, De Proft, F. De Proft, Frisch, Fuentealba, Galván, Garza, Geerlings, Geerlings, Ghanty, Ghosh, Ghosh, Gál, Gál, Gál, Gál, Gál, Gál, Gál, Gál, Gázquez, Harbola, Hehre, Koenig, Langenaeker, Lee, Levedev, Liu, Liu, M. Torrent-Sucarrat, Melin, Meneses, Meneses, Mignon, Mignon, Mulliken, Nagy, Nagy, Olasz, Ozen, P. Geerlings, Parr, Parr, Parr, Parr, Pearson, Pearson, Pearson, Pearson, Perdew, Roy, Saha, Saha, Saha, Sanderson, Slater, T. Gál, Thomas, Torrent-Sucarrat, Torrent-Sucarrat, Torrent-Sucarrat, Torrent-Sucarrat, Torrent-Sucarrat, Torrent-Sucarrat, Torrent-Sucarrat, Torrent-Sucarrat, Uline, Uline, Vargas, Yang, Zhou   +85 more
core   +1 more source

Pseudorandomness for Approximate Counting and Sampling [PDF]

, 2005
We study computational procedures that use both randomness and nondeterminism. The goal of this paper is to derandomize such procedures under the weakest possible assumptions.
Shaltiel, Ronen, Umans, Christopher
core   +4 more sources

Two-body wear and surface hardness of occlusal splint materials.

Dental materials journal, 2022
The aim of this in vitro study was to evaluate the wear and surface hardness of nine materials for conventional manufacturing, subtractive milling, and 3D printing of occlusal splints, as well as to evaluate the differences in wear and surface hardness ...
M. Gibreel, Leila Perea-Lowery, P. Vallittu, S. Garoushi, L. Lassila   +4 more
semanticscholar   +1 more source