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Fluctuating solutions for the evolution of domain walls
(Physics Letters B, 2009-08-17) [Artigo]
A class of oscillating Lorentz-covariant configurations for the evolution of the domain walls in diverse dimensions are analytically obtained. It is shown that the oscillating solutions in the case of domain walls are ...
Considerations about the welding repair effects on the structural integrity of an airframe critical to the flight-safety
(Fatigue 2010, 2010-01-01) [Artigo]
Structures critical to the flight-safety are commonly submitted to several maintenance repairs at the welded joints in order to prolong the in-service life of aircrafts. The aim of this study is to analyze the effects of ...
Evaluation of WC-10Ni thermal spray coating with shot peening on the fatigue strength of AISI 4340 steel
(Fatigue 2010, 2010-01-01) [Artigo]
Fatigue failure is a result of a crack initiation and propagation, in consequence of a cyclical load. In aeronautical components as landing gear the fatigue strength is an important parameter to be considered in project, ...
Fatigue fracture behavior of Ti-6Al-4V PVD coated
(Fatigue 2010, 2010-01-01) [Artigo]
Fatigue, corrosion and wear resistance are important parameters in aircraft components development as landing gear. High strength/weight ratio and effective corrosion resistance make of titanium alloys an alternative choice ...
An evaluation of shot peening, residual stress and stress relaxation on the fatigue life of AISI 4340 steel
(International Journal of Fatigue, 2002-08-01) [Artigo]
Shot peening is a method widely used to improve the fatigue strength of materials. through the creation of a compressive residual stress field (CRSF) in their surface layers. In the present research the gain in fatigue ...
Discoloration process modeling by neural network
(Chemical Engineering Journal, 2008-07-01) [Artigo]
The photo-oxidation of acid orange 52 dye was performed in the presence of H2O2, utilizing UV light, aiming the discoloration process modeling and the process variable influence characterization. The discoloration process ...
Effect of the usual weight of a backpack on body sway during quiet standing
(Journal of Physical Therapy Science, 2012-12-01) [Artigo]
[Purpose] The purpose of this study was to verify the effect on body sway during quiet standing of the habitual weight carried by students in a backpack. [Subjects] Forty-six students between the ages of 8 and 14 years ...
Electromyographic analysis of masseter and anterior temporalis muscle in sleep bruxers after occlusal splint wearing
(Journal of Bodywork and Movement Therapies, 2012-04-01) [Artigo]
Bruxism is widely defined as an anxiety response to environmental stress. Occlusal splints are frequently used in sleep bruxism, to protect teeth from damage resulting from the contraction force of mandibular muscles, or ...
Spinless bosons embedded in a vector Duffin-Kemmer-Petiau oscillator
(Physics Letters A, 2011-07-04) [Artigo]
Some properties of minimal and nonminimal vector interactions in the Duffin-Kemmer-Petiau (DKP) formalism are discussed. The conservation of the total angular momentum for spherically symmetric nonminimal potentials is ...
Labdane dimers from Xylopia aromatica
(Phytochemistry, 1999-07-01) [Artigo]
From the stem bark of Xylopia aromatica (Annonaceae), have been isolated two new labdane dimers as their methyl esters, together with the known compounds ent-labda-8(17),13(16),14-trien-18-oic acid, sitosterol and stigmasterol. ...