As a renewable building material with low embodied energy characteristics, wood has gained more and more attention in the green and sustainable building industry. In terms of material resource and physical properties, scrimber composite not only makes full use of fast-growing wood species, but also has better mechanical performance and less inherent variability than natural wood material. In th...

This article applies a novel bootstrap method, the kernel block (KBB), to quasi-maximum likelihood (QML) estimation of dynamic models with stationary strong mixing data. The method first weights components comprising quasi-log function in an appropriate way and then samples resultant transformed using standard ‘m out n’ bootstrap. We investigate first-order asymptotic properties KBB for QML dem...

The dynamic response of complex equipment under mixed-mode loading is significant for structural design. Bolted joints are the primary connection mode subsystem assembly, and degradation bolted may reduce safety reliability equipment. Iwan model widely used to describe joints, which has been continuously revised experimentally verified. classic a static that lacks predictive ability. latest can...

OBJECTIVE The aim of this study was to compare torque expression in active and passive self-ligating and conventional brackets. METHODS A total of 300 segments of stainless steel wire 0.019 x 0.025-in and six different brands of brackets (Damon 3MX, Portia, In-Ovation R, Bioquick, Roth SLI and Roth Max) were used. Torque moments were measured at 12°, 24°, 36° and 48°, using a wire torsion dev...

An analytical approximate solution is developed for predicting the thermal resistance of bolted joints between two square plates . of the same material but different thicknesses. The plates are assumed to have perfectly flat and smooth surfaces, and they are joined by a bolted connection at the center of the square, forming a concentric annular contact region at the interface. The entire surfac...

background and aims: to obtain maximum advantages from orthodontic fixed appliances and to achieve the desired final occlusion, correct bracket positioning is highly necessary. in order to measure and determine bracket’s height, diverse gauges have been used. the objective of the present study is to determine and compare bracket positioning accuracy by using height bracket positioning gauge (hb...

This short note is devoted to the study of the Hamiltonian formalism and the integrability of the bosonic model introduced in [hep-th/0612079]. We calculate Poisson bracket of spatial components of Lax connection and we argue that its structure implies classical integrability of the theory.

On a manifold with a projective connection we canonically assign a second order differential operator acting on the algebra of all densities to any tensor density S of fixed weight λ. In particular, this implies that on any projectively connected manifold, a ‘bracket’ (symmetric biderivation) on the algebra of functions extends canonically to the algebra of densities.