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Effect of molar rotation on arch length
Clinical Orthodontics and Research, 2001The aim of this study was to evaluate the effect of maxillary first molar rotation on arch length in patients whose Class II, division 1 malocclusion was treated with a straight‐pull headgear. The sample included 19 children who represent a subset of a population enrolled for 2 years in a prospective clinical trial of Class II treatment.
J L, McDonald, F S, Shofer, J, Ghafari
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Influence of Soil-Arching Effect on Tunnel Face Stability
International Journal of Geomechanics, 2021Based on the slip line theory and the upper-bound limit analysis theorem, a three-dimensional (3D) slip–rupture mechanism to design the shield tunnel face stability is proposed.
Keqi Liu, D. Dias, W. Ding, Rui Chen
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A test for multivariate ARCH effects
Applied Economics Letters, 2005This paper extends Engle's LM test for ARCH affects to multivariate cases. The size and power properties of this multivariate test for ARCH effects in VAR models are investigated based on asymptotic and bootstrap distributions. Using the asymptotic distribution, deviations of actual size from nominal size do not appear to be very excessive ...
R. Scott Hacker, Abdulnasser Hatemi-J *
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Jacking Force Prediction for Box Jacking Tunnel Considering the Soil Arching Effect
International journal for numerical and analytical methods in geomechanics (Print)During the construction of box jacking tunnel, stress transfer caused by the soil arching effect is an important factor, affecting the jacking force. This study proposes a jacking force prediction method for box jacking tunnels under the complete and ...
Da Hu +6 more
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Effect of Prestressing on Elastica Arches
Journal of Engineering Mechanics, 1988Symmetrical and asymmetrical buckling of a prestressed arch and its equivalent rigid arch framework are investigated using a nonlinear finite element model. A corotational formulation of a three-dimensional beam element is employed to perform large displacement, large rotation analysis. Comparisons are made between buckling loads of a class of circular
Seyed A. Chini, Amde M. Wolde‐Tinsae
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Arching Effects in Box Jacking Projects
Pipelines 2015, 2015Box culverts are an essential component of highways and railroads since they transfer storm runoffs from upstream to downstream. Box jacking (BJ) is a trenchless technology method to install box culverts under embankments of existing highways and railroads with minimum surface disruptions.
Babak Mamaqani, Mohammad Najafi
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Theoretical model of lateral soil arching effect in sand with flexible retaining wall
Geotechnical EngineeringDuring geotechnical constructions, at-side unloading such as excavation leads to stress redistribution in the adjacent soil and the development of soil arching effect in a lateral direction.
Ren-Peng Chen +4 more
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Elastic foundation effects on arch dams
Challenge Journal of Structural Mechanics, 2017Earthquake response of an arch dam should be calculated under ground motion effects. This study presents three-dimensional linear earthquake response of an arch dam. Thereby, we considered different ground motion effects and also foundation conditions in the finite element analyses.
Muhammet Karabulut +3 more
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International Journal of Geomechanics, 2020
Soil arching effect has been widely recognized as one of the most critical factors governing load-transfer mechanism in the design of various geotechnical infrastructures.
Luju Liang +3 more
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Soil arching effect has been widely recognized as one of the most critical factors governing load-transfer mechanism in the design of various geotechnical infrastructures.
Luju Liang +3 more
semanticscholar +1 more source
Effect of the transpalatal arch during extraction treatment
American Journal of Orthodontics and Dentofacial Orthopedics, 2008The transpalatal arch (TPA) can be used as an adjunct during orthodontic treatment to help control the movement of the maxillary first molars in 3 dimensions, including producing molar rotation and uprighting, maintaining transverse dimensions posteriorly during treatment, and maintaining leeway spaces during the transition of the dentition.
H. L. Zablocki +3 more
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