Nonlinear static procedure (NSP) is a common technique to predict seismic demands on various building structures by subjecting a monotonically increasing horizontal loading (pushover) to the structure. Therefore, the pushover analysis is an important part of each NSP. Accordingly, the current paper aims at investigating the efficiencyof various algorithms of lateral load patterns applied to the...

A method to compute the “exact” or consistent sensitivities to material and loading parameters of the numerical nonlinear finite element response was developed by other researchers and the second author. This general method is referred to in the literature as the Direct Differentiation Method (DDM). This paper focuses on the behavior of stand-alone sensitivity results. It presents the results o...

Purpose: This research aimed to study the effect of 8 weeks core stability training on static balance of the children with Down syndrome. Methods: A total of 16 children with Down syndrome from rehabilitation center of Noor Abad City were selected and randomly divided into 2 groups of control (n=8) and experimental (n=8). At the pretest and posttest, subjects’ static balan...

The determination of structural and nonstructural damage under earthquake excitations is usually considered as a key factor in performance-based seismic design (PBSD) methods is In this regard, various damage indices have been developed in recent years to quantitatively estimate structural damage. The aim of this study is to develop a simple method to evaluate performance levels of zipper-brace...

This paper presents Subsumption{oriented Push{Down Auto-mata (SPDA), a very general stack formalism used to describe forest (\AND{ OR" tree) traversals. These automata may be used for parsing or the interpretation of logic programs. SPDA allow a Dynamic Programming execution which breaks computations into combinable, sharable and storable sub{computations. They provide computation sharing and o...

We study the dynamic behaviour of a hybrid system where manufacturing and remanufacturing operations occur simultaneously to produce same serviceable inventory for order fulfilment. Such system, commonly found in photocopier personal computer industries, has received considerable attention literature. However, its performance resulting bullwhip effect, under push pull policies, remain unexplore...

In the current study, the effects of Casimir force and squeeze film damping on pull-in instability and dynamic behavior of electrostatically actuated nano and micro electromechanical systems are investigated separately. Linear elastic membrane theory is used to model the static and dynamic behavior of the system for strip, annular and disk geometries. Squeeze film damping is modeled using nonli...

A new class of languages, called multi-push-down (mpd), that generalize the classical context-free (cf, or Chomsky type 2) ones is introduced. These languages preserve some important properties of cf languages: a generalization of the Chomsky-Schh utzenberger homomorphic characterization theorem, the Parikh theorem and a \pumping lemma" are proved. Multi-push-down languages are an AFL. Their re...