A Walk in the Invisible City

This essay discusses the performative interventions of the contemporary Belgian artist Francis Alÿs in Mexico City and how they create a critical focus on urban reality in the Latin American mega-cities, and outline ways of intervention and interaction in the modern disassociation of the city’s economical, social, and cultural levels, taking up the challenge to suggest their unity through imagination and art.     

Soul–life–knowledge: The young Mannheim’s way to sociology

This essay discusses a less known period of Karl Mannheim’s life, namely the period he spent in Hungary. I attempt to point out that the career of the young Mannheim, starting from a philosophical interest and continuing with a sociological one, is continuous. His first published works and letters prove that in the period preceding his emigration to Germany in 1919 he was concerned with questions that received their mature form in his sociology of knowledge. They include primarily the question of culture, that of perspective-boundedness (relativity) of cognition, interpretation and the problem of intellectuals. Despite changing disciplines from philosophy to sociology, the continuity of his oeuvre can be shown.     

Auditory and haptic systems for in-car speed management – A comparative real life study

Field experiments with ISA (intelligent speed adaptation) were carried out in Hungary and Spain in 2003 and 2004, respectively. Twenty private vehicles in each country were equipped with two kinds of systems: (1) support via an active accelerator pedal (AAP) and (2) warning via beep signals and a flashing red light when the speed limit was exceeded (BEEP). The test drivers drove for a month with both systems installed in each car. Speed was continually logged in all the vehicles and the test drivers were interviewed about their acceptance and experiences of the systems. The results show that both systems reduced the mean and 85 percentile speeds, but that the AAP was more effective. There was no long-lasting effect on speeds when the systems were removed. After the trial half of the drivers were willing to keep an ISA system, but more drivers wanted to keep the BEEP-system even though it showed lower satisfaction ratings than the AAP. The results indicate no major differences between the countries despite the workload being perceived to be higher in Hungary than in Spain.     

ONESC: A database of orthographic neighbors for Spanish read by children

In this article, we present a database of orthographic neighbors for words that Spanish children read during elementary education. The reference dictionary for lexical entries and frequencies (which had its origin in Martínez & García, 2004) comprises approximately 100,000 words and is the result of accumulating the words read by a sample of children from first to sixth grades. Using the criterion for orthographic neighbors described by Coltheart, Davelaar, Jonasson, and Besner (1977), we present basic statistics related to neighborhood size as a function of the positions of divergent letters, the cumulative frequency of the neighbors, and the numbers of neighbors of higher, lower, and equal frequency. We also attempt to illustrate and unravel the nature of the relationships among the variables neighborhood size, length, and frequency in the distribution of neighbors. The database described in this article is available at www.psychonomic.org/archive.     

The phenomenology of propositional attitudes

Propositional attitudes are often classified as non-phenomenal mental states. I argue that there is no good reason for doing so. The unwillingness to view propositional attitudes as being essentially phenomenal stems from a biased notion of phenomenality, from not paying sufficient attention to the idioms in which propositional attitudes are usually reported, from overlooking the considerable degree to which different intentional modes can be said to be phenomenologically continuous, and from not considering the possibility that propositional attitudes may be transparent, just like sensations and emotions are commonly held to be: there may be no appropriate way of describing their phenomenal character apart from describing the properties and objects they represent.     

Equational Characterization of the Subvarieties of BL Generated by t-norm Algebras

In this paper we show that the subvarieties of BL, the variety of BL-algebras, generated by single BL-chains on [0, 1], determined by continous t-norms, are finitely axiomatizable. An algorithm to check the subsethood relation between these subvarieties is provided, as well as another procedure to effectively find the equations of each subvariety. From a logical point of view, the latter corresponds to find the axiomatization of every residuated many-valued calculus defined by a continuous t-norm and its residuum. Actually, the paper proves the results for a more general class than t-norm BL-chains, the so-called regular BL-chains.     

Event-learning and robust policy heuristics

In this paper we introduce a novel reinforcement learning algorithm called event-learning. The algorithm uses events, ordered pairs of two consecutive states. We define event-value function and we derive learning rules. Combining our method with a well-known robust control method, the SDS algorithm, we introduce Robust Policy Heuristics (RPH). It is shown that RPH, a fast-adapting non-Markovian policy, is particularly useful for coarse models of the environment and could be useful for some partially observed systems. RPH may be of help in alleviating the ‘curse of dimensionality’ problem. Event-learning and RPH can be used to separate time scales of learning of value functions and adaptation. We argue that the definition of modules is straightforward for event-learning and event-learning makes planning feasible in the RL framework. Computer simulations of a rotational inverted pendulum with coarse discretization are shown to demonstrate the principle.     

Flow Versus Life Satisfaction: A Projective Use of Cartoons to Illustrate the Difference Between the Evaluation Approach and the Intrinsic Motivation Approach to Subjective Quality of Life

In this paper, differences between life satisfaction and intrinsic motivation (flow) are addressed. Theories are presented on evaluation, flow and openness to experience. Data from a Norwegian panel study are analyzed by means of structural equation modeling. Young adults (n = 264) participated in a projective study with cartoon frames showing Donald Duck in challenging situations. Measures of satisfaction with life and the personality trait of openness to experience were added to the analysis. Subjects scoring high on openness rated Donald Duck's feelings as positive. A slightly opposing tendency was found for persons scoring high on satisfaction with life. The results are discussed with reference to the philosophical distinction between hedonism and eudaemonia.