This paper is concerned with the investigation of mediation between users and Web search engines and the impact of different modes of mediation on the Web search effectiveness. This involves the integration of explicit, implicit and hybrid modes of mediation within a content-based framework, facilitated by the adoption of the Vector Space Model. The work is supported by an experimental evaluati...

Title:Having mentors moderates the impact of worries and video gaming on the development of depressive symptoms: A moderated mediation analysis

In this paper, we describe the R package mediation for conducting causal mediation analysis in applied empirical research. In many scientific disciplines, the goal of researchers is not only estimating causal effects of a treatment but also understanding the process in which the treatment causally affects the outcome. Causal mediation analysis is frequently used to assess potential causal mecha...

This paper describes a formalism for context mediation based on Feature Logic. The formalism enables a distinction to be drawn between integrity and translational aspects of mediation. It is independent of the relational model, though easily used within it. The formalism makes precise the concept of 'context' and provides a framework for mediation between disparate data sources.

In this paper we introduce the Mediation Core Ontology (MCO), and the steps taken in order to model the expert knowledge on the mediation domain. MCO is created from scratch by eliciting practical knowledge from mediation experts to identify the basic working concepts of the domain. MCO offers initial support towards knowledge acquisition and reasoning and, in later steps, will serve as a gener...

In this paper we describe the steps taken to model expert knowledge within the mediation domain as the basis for the design of the Mediation Core Ontology (MCO), of which we also offer a first outline of its present stage of development. MCO is created from scratch by eliciting practical knowledge from mediation experts to identify the basic working concepts of the domain. MCO offers initial su...

Most empirical tests of mediation utilize cross-sectional data despite the fact that mediation consists of causal processes that unfold over time. The authors considered the possibility that longitudinal mediation might occur under either of two different models of change: (a) an autoregressive model or (b) a random effects model. For both models, the authors demonstrated that cross-sectional a...

We provide string theory examples where a toy model of a SUSY GUT or the MSSM is embedded in a compactification along with a gauge sector which dynamically breaks supersymmetry. We argue that by changing microscopic details of the model (such as precise choices of flux), one can arrange for the dominant mediation mechanism transmitting SUSY breaking to the Standard Model to be either gravity me...

Strongly coupled semi-direct gauge mediation models of supersymmetry breaking through massive mediators with standard model charges are investigated by means of composite degrees of freedom. Sizable mediation is realized to generate the standard model gaugino masses for a small mediator mass without breaking the standard model symmetries. SLAC-PUB-1459 Work supported in part by US Department of...