We show that the spatial correlation function of a flux-limited sample of Xray selected clusters of galaxies will exhibit a correlation scale that is smaller than the correlation scale of a volume-limited, richness-limited sample of comparable apparent spatial density. The flux-limited sample contains clusters of different richnesses at different distances: poor groups are found nearby and rich...

In this paper we solve the problem of the existence of rational realizations of response maps. Sufficient and necessary conditions for a response map to be realizable by a rational system are presented. We provide also the characterization of the existence of rationally observable and canonical rational realizations for a given response map.

Successful dialogue is based on collaborative efforts of the interactants to ensure mutual understanding. This paper presents work towards making conversational agents ‘attentive speakers’ that continuously attend to the communicative feedback given by their interlocutors and adapt their ongoing and subsequent communicative behaviour to their needs. A comprehensive conceptual and architectural ...

In the paper conceptual and physical realisation of a railway demonstrator model is presented. The main purpose of its design is a validation of different control algorithms specified by different project groups in real operating conditions. Conceptual tasks of the realisation are the specification of the target operational behaviour and the derivation of functional structure of the railway mod...

We consider a linear mixed-effects model where Yk,j = αk+βktj+εk,j is the observed value for individual k at time tj , k = 1, . . . , N , j = 1, . . . , J . The random effects αk, βk are independent identically distributed random variables with unknown densities fα and fβ and are independent of the noise. We develop nonparametric estimators of these two densities, which involve a cutoff paramet...

For notational convenience, we often omit any reference to the sample space, Ω. However, we still systematically distinguish a random variable from one of its realizations, by using upper cases for the former and lower cases, for the latter. A realization from a random variable is also referred to as an observed value. Note that this upper/lower case convention is not respected by Weisberg, in ...

We derive asset-pricing and portfolio-choice implications of a dynamic incomplete-markets model in which consumers are heterogeneous in several respects: labor income, asset wealth, and preferences. In contrast to earlier papers, we insist on at least roughly matching the model’s implications for heterogeneity—notably, the equilibrium distributions of income and wealth—with those in U.S. data. ...

We present a new realization of scalar integrable hierarchies in terms of the Toda lattice hierarchy. In other words, we show on a large number of examples that an integrable hierarchy, defined by a pseudodifferential Lax operator, can be embedded in the Toda lattice hierarchy. Such a realization in terms the Toda lattice hierarchy seems to be as general as the Drinfeld–Sokolov realization.

This paper describes the development of “MaskBot 2i” (codenamed: Kabuto), a robotic head designed for research into Human-Robot-Interactions. The uniqueness of our new robotic head is that the appearance of its face can be alter on-the-fly. Different faces can be projected onto the active head system. The head is fully active with a 3-DOF neck, with support for biannual hearing as well as video...

In several application domains ranging from automotive to aerospace (Garro, Groß, Riestenpatt Gen. Richter and Tundis, 2013; Falcone, Garro and Tundis, 2014; Garro, Groß, Riestenpatt Gen. Richter and Tundis, 2012; Garro and Tundis, 2012b; Garro and Tundis, 2012c; Garro, Tundis and Chirillo, 2011), a great variety of systems are currently designed and developed by organizing and integrating exis...