Results 41 to 50 of about 1,549,267 (194)

The polymerization efficiency of a bulk-fill composite based on matrix-modification technology [PDF]

open access: yesRestorative Dentistry & Endodontics, 2020
ObjectivesTo evaluate the polymerization efficiency of a matrix-modified bulk-fill composite, and compare it to a conventional composite which has a similar filler system.
Tarek M. Elshazly   +4 more
doaj   +1 more source

Anisotropically high entanglement of biphotons generated in spontaneous parametric down conversion [PDF]

open access: yes, 2006
We show that the wave packet of a biphoton generated via spontaneous parametric down conversion is strongly anisotropic. Its anisotropic features manifest themselves very clearly in comparison of measurements performed in two different schemes: when the ...
Efremov, M. A.   +5 more
core   +2 more sources

The difference nanocomposite hardness level using LED photoactivation based on curing period variations

open access: yesPadjadjaran Journal of Dentistry, 2011
Polimerizatian is the critical stage to determine the quality of composites resin, this involves isolated monomer carbon double bonds being converted to an extended network of single bonds.
Hasiana Tatian   +2 more
doaj   +1 more source

Two-Way Automata Making Choices Only at the Endmarkers

open access: yes, 2011
The question of the state-size cost for simulation of two-way nondeterministic automata (2NFAs) by two-way deterministic automata (2DFAs) was raised in 1978 and, despite many attempts, it is still open.
Geffert, Viliam   +2 more
core   +1 more source

Enhanced anti-bacterial adhesion effect of FDMA/SR833s based dental resin composites by using 1H,1H-heptafluorobutyl methacrylate as partial diluent

open access: yesBiomaterial Investigations in Dentistry, 2023
With the purpose of further reducing surface free energy to achieve better anti-bacterial adhesion effect of fluorinated dimethacrylate (FDMA)/tricyclo (5.2.1.0) decanedimethanol diacrylate (SR833s) based dental resin composites (DS), 1H,1H ...
Shengcan Zhang, Fang Liu, Jingwei He
doaj   +1 more source

Demonstration of Temporal Distinguishability in a Four-Photon State and a Six-Photon State

open access: yes, 2006
An experiment is performed to demonstrate the temporal distinguishability of a four-photon state and a six-photon state, both from parametric down-conversion. The experiment is based on a multi-photon interference scheme in a recent discovered NOON-state
D. M. Greenberger   +7 more
core   +1 more source

Correlation between shear bond strength and degree of conversion of four orthodontic adhesives.

open access: yesErbil Dental Journal, 2023
Background and objective: The aim of the study is to assess the correlation between degree of monomer conversion (DC) and shear bond strength (SBS) of the different adhesives.
Hangaw Tariq Ibrahim   +1 more
doaj  

Stimulated Emission Tomography: Beyond Polarization

open access: yes, 2018
In this work we demonstrate the use of stimulated emission tomography to characterize a hyper-entangled state generated by spontaneous parametric down-conversion in a CW-pumped source.
Ciampini, Mario Arnolfo   +6 more
core   +1 more source

Optimal Constant-Time Approximation Algorithms and (Unconditional) Inapproximability Results for Every Bounded-Degree CSP [PDF]

open access: yes, 2010
Raghavendra (STOC 2008) gave an elegant and surprising result: if Khot's Unique Games Conjecture (STOC 2002) is true, then for every constraint satisfaction problem (CSP), the best approximation ratio is attained by a certain simple semidefinite ...
Yoshida, Yuichi
core   +1 more source

Degree of Conversion of Polymer-matrix Composite assessed by FTIR Analysis

open access: yesThe Journal of Contemporary Dental Practice, 2013
ABSTRACT Aims and objectives The behavior of polymer-matrix composite is dependent on the degree of conversion. The aim of this study was to evaluate the degree of conversion of two resin cements following storage at 37°C immediately, 24 and 48 hours, and 7 days after light-curing by FTIR analysis.
Tonetto, Mateus Rodrigues   +7 more
openaire   +4 more sources

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