"This paper will investigate the issue of weighting for panel attrition in event-history models by comparing alternative treatments of sampling weights in a divorce model for members of the 1986 [U.S.] Survey of Income and Program Participation (SIPP). Three distinct weighting procedures are compared. These are based on (1) the initial selection probability weights; (2) the 1986 SIPP panel weig...

This paper review history of work in the development of abstract harmonic analysis, which is a mathematical discipline attempting to extend the classical Fourier analysis to various groups.

We give formal content to some concepts, naturally stemming from consistent history approach (CHA), which are not formalized in the standard formulation of the theory. The outcoming (extended) conceptual basis is used to perform a formal, conceptually transparent analysis of some debated questions in CHA. As results, the problems raised by contrary inferences of Kent are ruled out, whereas some...

What is urban economics?1 I will refrain from torturing myself with this issue. Any definition will be too wide for some and too narrow for others. My definition will be simple, but appropriate for my interests and background: urban economics is scholarly writing that has specifically urban content and contains specifically economic analysis. Everyone will notice that my definition leaves room ...

A modern scientist would write d = vt, meaning distance equals velocity times time. In the works of Galileo, Huygens, and Newton, one never finds a numerical value for a velocity, an acceleration, or a force. Instead, results are stated in terms of ratios (as in the above quotation). Any calculation that one could perform in the modern way, using equations that relate dimensioned quantities, co...

A family history of shoulder instability in first-degree relatives was found in 24 of 100 patients who had been operated on for recurrent anterior shoulder instability. The patients with and without a family history were similar in respect of sex ratio, age at first dislocation and age at operation. The initial dislocation was non-traumatic in 22% of the patients with and in 13% of those withou...

The idea that diversity in the population of a genetic algorithm affects the algorithm’s search efficiency is widely accepted. However, little is known about the amount of node level diversity present in Genetic Programming (GP) runs. In this paper, we introduce several techniques for measuring the diversity of a population based on the genetic history of the individuals. We then apply these me...

The evolving complex software models are designed and maintained by a team of designers using collaborative modeling tools with a support of version control. Collaborative modeling tools provide a teamwork of several designers on a shared modeling artifact, whereas model version control is used to store, manage and handle the histories of that model. During the evolution and maintenance process...

The Integrated Design Process (IDP) is a method of intervention in early stages of the design process that supports the development and design team to avoid sub-optimal design solutions. IDP is not a new concept, and may in fact have been applied in the past by some design teams on an ad-hoc basis; but the formal implementation of the process is a development that has taken place over the past ...

After Northridge (1994) and Kobe (1995) earthquakes, several studies have been conducted to improve the seismic performance of steel structures. In this investigation, new steel moment-resisting connections (FSFN) developed by the authors, were studied by the non-linear numerical analysis. These connections were single-sided beam-to-column assemblies that are representative of exterior beam-to-...