the accuracy of stereolithography (sl) product is very essential for meeting the intended functional applications. the parameters like layer thickness, hatch spacing, hatch overcure contribute significantly to the accuracy of the sl parts. in this paper an attempt has been made to identify the process parameters that influences on the accuracy of the parts made with ciba tool 5530 and optimize ...

In this study, Flake-like magnesium hydroxide (Mg(OH)2) and cubic-like aluminum hydroxide (Al(OH)3) nanostructures were synthesized via a simple co-precipitation method at relatively low temperature. Chemical properties and surface morphology of the magnesium hydroxide and aluminum hydroxide were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy image (SEM), transm...

Problem 1. Consider a modified random walk defined as follows. If Yn = k, then Yn+1 = max{0,min{k +Xn+1, N}} where the {Xn, n ≥ 1} are i.i.d. with P (Xn = +1) = p = 1−P (Xn = −1). The random variable Y0 is independent of {Xn, n ≥ 1}. Assume that 0 < p < 1. a. Calculate the stationary distribution of {Yn, n ≥ 0}. b. Use a probabilistic (coupling) argument to show that {Yn, n ≥ 0} is asymptotical...

In this paper we calculate the particle creation as seen by a stationary observer in 3+1 de Sitter space. This particle creation is calculated using an observer dependent geometrically based definition of time which is used to quantize a field on two different spacelike surfaces. The Bogolubov transformation relating these two quantizations is then calculated and the resulting particle creation...

A series of analogs of glucagon-like peptide-1 (GLP-1) was made replacing each amino acid with L-alanine to identify side-chain functional groups required for interaction with the GLP-1 receptor. In the case of L-alanine being the parent amino acid, substitution was made with the amino acid found in the corresponding position in glucagon. Binding assays were performed using the cloned rat GLP-1...

In this, a follow up to a previous paper ‘A Short Article On A Newly Proposed Model Of Cosmology’ (viXra:0909.0005), some of the basic mathematical structures to be used in the formulation of the model are shown, and several advantages are discussed. The paper then takes a more phenomenological approach and several simple (1+1) dimensional models are explored.

the continuous improvement of eaf performance is crucial for the increase in productivity and cost effectiveness and to render an environmental friendly process. rhi supports these targets by providing a diverse range of refractory and process solutions. chemical energy in practical operation by injection of gaseous media like oxygen and natural gas, and solid materials like carbon have become ...

The Jackiw-Teitelboim gauge formulation of the 1+1 dimensional gravity allows us to relate different gauge fixing conditions with integrable hierarchies of evolution equations. We show that the equations for the Zweibein fields can be written as a pair of time reversed evolution equations of the reaction-diffusion type, admitting dissipative solutions. The spectral parameter for the related Lax...