Some researchers believe that the psychological or consciousness arrow of time is a consequence of the thermodynamic arrow. Some don’t. As for many issues in this area, the disagreement revolves about fundamental and undebatable assumptions. As a contribution to this standoff I consider the extent to which a computer—presumably governed by nothing more than the thermodynamic arrow—can be said t...

Nowadays, the exponential advancement of social networks is creating new application areas for recommender systems (RSs). People-to-people RSs aim to exploit user’s interests for suggesting relevant people to follow. However, traditional recommenders do not consider that people may share similar interests but might have different feelings or opinions about them. In this paper we propose a novel...

In recent years the major developments in employee-benefit plans sponsored or underwritten by private organizations have been reported regularly in the Social Xecurity Bulletin. Thiis year the report is in two parts. Part I, which appeared in the April issue of the Bulletin, included 1959 data on coverage, contributions, and benefits under health, welfare, and retirement plans. In addition it d...

From time to time the Bulletin carries reports on operations in the five States that supplement the unemployment insurance benefit with a small allowance for dependents of beneficiaries . This article discusses sources from which data on the dependents of wage earners can be obtained and the use of such information in estimating the extent to which inclusion of dependents’ allowances aflects th...

A biogeographic regionalisation of the Andean region is proposed as a hierarchical classification of sub-regions, provinces, sub-provinces and districts. It is based on biogeographic analyses of terrestrial plant and animal taxa, and seeks to provide universality, objectivity and stability. The Andean region is currently comprised of the Central Chilean, Subantarctic and Patagonian sub-regions ...

In recent years knowledge management (KM) has received increased attention from academics and practitioners. There are several challenges to establishing KM as a separate discipline one of the most central being conceptual plurality. The purpose of this paper is to review and position 20 of the most frequently cited KM articles in management journals. More specifically, this paper classifies th...

We propose a conceptual framework for understanding the relationship between observables and operators in mechanics. To do so, we introduce a postulate that establishes a correspondence between the objective properties permitting to identify physical states and the symmetry transformations that modify their gauge dependant properties. We show that the uncertainty principle results from a faithf...