In this paper, we describe a collaborative filtering approach that uses features of users and items to better represent the problem space and to provide better recommendations to users. Features of the collaborative filtering dataset are found and incorporated into a network representation of the collaborative filtering space where users and items are represented by nodes and where the nodes ar...

We start by presenting the Tip-Of-the-Tongue (TOT) problem and some theories accounting for it. We go then on to consider it within the framework of a neurobiological, computational model: Guided Propagation Networks (GPNs). “Selective facilitation”, a feature of the model, allows us to formulate and test various hypotheses accounting for the impeded access to a target word. We will illustrate ...

Systemically administered oncolytic viruses have the ability to cause tumor destruction through the expansion and coalescence of intratumoral infectious centers. Efficacy is therefore dependent upon both the density and intratumoral distribution of virus-infected cells achieved after initial virus infusion, and delivery methods are being developed to enhance these critical parameters. However, ...

To document the in vivo interactions occurring between the immune system and HIV replicating cells, we analyzed using in situ hybridization the production of IL-1 beta, IL-6, IL-2, and INF-gamma in eight hyperplastic lymph nodes from HIV-1 infected patients. Numerous IL-1 beta- and IL-6-producing cells associated in clusters were detected in sinuses. Few individual IL-1 beta- and IL-6-producing...

This article sets forth a detailed theoretical proposal of how the truth of ordinary empirical statements, often atomic in form, is computed. The method of computation draws on psychological concepts such as those of associative networks and spreading activation, rather that the concepts of philosophical or logical theories of truth. Axioms for a restricted class of cases are given, as well as ...

Techniques that traditionally have been useful for retrieving same domain analogies from small single use knowledge bases such as spreading activation and indexing on selected features are inadequate for retrieving cross domain analogies from large multi use knowledge bases In this paper we describe Knowledge Directed Spreading Activation KDSA a new method for retriev ing analogies in a large s...

In naturally occurring speech and gesture, meaning occurs organized and distributed across the modalities in different ways. The underlying cognitive processes are largely unexplored. We propose a model based on activation spreading within dynamically shaped multimodal memories, in which coordination arises from the interplay of visuo-spatial and linguistically shaped representations under give...

2 The main abbreviations used in this article in addition to DIS are: IR (Information Retrieval), SA (Spreading Activation), and ARP (Active Recommendation Project). Luis Mateus Rocha and Johan Bollen Los Alamos National Laboratory, MS B256 MS B362 Los Alamos, NM 87545, USA E-Mail: [email protected] or † [email protected], [email protected] WWW: http://www.c3.lanl.gov/~rocha , http://www.c3.lanl.go...

  Spreading and coating of nano and micro droplets on solid surfaces is important in a wide variety of applications including plasma spray coating, ink jet printing, DNA synthesis and etc. In spraying processes, most of droplets collide obliquely to the surface. The purpose of this article is to study the distribution of nano and micro droplets spreading when droplets impact at an oblique a...