Can implicit feedback substitute for explicit ratings in recommender systems? If so, we could avoid the difficulties associated with gathering explicit ratings from users. How, then, can we capture useful information unobtrusively, and how might we use that information to make recommendations? In this paper we identify three types of implicit feedback and suggest two strategies for using implic...

One common dichotomy faced in recommender systems is that explicit user feedback -in the form of ratings, tags, or user-provided personal informationis scarce, yet the most popular source of information in most state-of-the-art recommendation algorithms, and on the other side, implicit user feedback such as numbers of clicks, playcounts, or web pages visited in a sessionis more frequently avail...

Introduction Implicit attitudes are preferences that exist outside of conscious awareness or conscious control. Recent evidence demonstrates that these preferences are variably related to selfreported (explicit) measures of preference. For example, Nosek, Banaji, & Greenwald (in press; Group Dynamics) showed that correspondence between implicit and explicit measures partially depends on the tar...

Fredholm determinant asymptotics of convolution operators on large finite intervals with rational symbols having real zeros are studied. The explicit asymptotic formulae obtained can be considered as a direct extension of the Ahiezer-Kac formula to symbols with real zeros.

We present an explicit method to evaluate the nonnegativity of order 3 Matrix exponential functions.

Colour symmetries with ten colours are presented for different tilings. In many cases, the existence of these colourings were predicted by group theoretical methods. Only in a few cases explicit constructions were known, sometimes using combination of two-colour and five-colour symmetries. Here we present explicit constructions of several of the predicted colourings for the first time, and disc...

Space is one of the resources that may cause crucial problems during construction. Discrete event simulation has been widely used in construction to allocate resources and improve productivity or mitigate conflicts. However, simulation research that provides an explicit method to investigate possible space conflicts is still limited. This paper suggests a cell-based modeling approach to represe...

We present a general scheme for describing ŝu(N)k fusion rules in terms of elementary couplings, using Berenstein-Zelevinsky triangles. A fusion coupling is characterized by its corresponding tensor product coupling (i.e. its Berenstein-Zelevinsky triangle) and the threshold level at which it first appears. We show that a closed expression for this threshold level is encoded in the Berenstein-Z...