response modification factor (r-factor) is one of the seismic design parameters to consider nonlinear performance of building structures during strong earthquake. relying on this, many seismic design codes led to reduce earthquake loads imposed to the structure. the present paper tries to evaluate the r-factors of conventional concentric braced frames (cbfs) and special moment frames (mrfs) in ...

The control process for a chaotic system as proposed by Ott, Grebogi and Yorke (OGY) is investigated for systems with a one-dimensional Poincaré map. The calculation of the Poinaré map for the controlled system turns out to be an instructive method to analyze the mechanism of OGY control. We introduce the notion of a region of immediate capturing, characterizing the maximum control region that ...

OBJECTIVES There is growing emphasis on empirical validation of the efficacy of community-based services for older people and their families, but research on services such as respite care faces methodological challenges that have limited the growth of outcome studies. We identify problems associated with the usual research approaches for studying respite care, with the goal of stimulating use o...

Evidence has accumulated in recent years of the occurrence, in certain nonlinear systems. of strange nonchaotic attractors. that is attractors whose geometrical character is not simple, but on and near to which the exponential divergence of trajectories. characteristic of chaotic behaviour. does not occur. This behaviour has implications for predictability; small errors in initial conditions gr...

We present a generalization of the standard random-search model of unemployment in which firms hire multiple workers and in which the hiring process is timeconsuming as well as costly. We follow Stole and Zwiebel (1996a, 1996b) and assume that wages are determined by continuous bargaining between the firm and its employees. The model generates a nontrivial dispersion of firm sizes; when firms’ ...

This chapter surveys some recent work on the application of techniques from computational geometry to geometric problems arising in manufacturing processes such as layered manufacturing, mold design, and numerically controlled machining. Within each topic, we discuss problems that have benefited from the application of geometric techniques, and mention several other problems where such techniqu...

The generating function for recurrent Polya walks on the four dimensional hypercubic lattice is expressed as a Kampé-de-Fériet function. Various properties of the associated walks are enumerated. Lattice statistics play an important role in many areas of chemistry and statistical physics. Random lattice walks have been investigated extensively, both numerically and analytically, and explicit an...

BACKGROUND Juveniles with intellectual disabilities (ID) are more often victims of maltreatment and more often perpetrators of abuse than juveniles without ID. Because previous research on the relationship between maltreatment victimisation and subsequent offending behaviour was primarily performed in non-disabled samples, the present study aimed to examine differences between juvenile offender...

The evolution of repeated genes forming a multigene family in a finite population is studied with special reference to the probability of gene identity, i.e., the identity probability of two gene units chosen from the gene family. This quantity is called clonality and is defined as the sum of squares of the frequencies of gene lineages in the family. The multigene family is undergoing continuou...