If Only It Were So Easy

It Was Easy, when Apples and Blackberries Were only Fruits

Ambiguities in company names are omnipresent. This is not accidental, companies deliberately chose ambiguous brand names, as part of their marketing and branding strategy. This procedure leads to new challenges, when it comes to finding information about the company on the Web. This paper is concerned with the task of classifying Twitter messages, whether they are related to a given company: fo...

Population strategies for prevention? If only it were that simple!

A Negative Conjunctive Query is Easy if and only if it is Beta-Acyclic

It is known that the data complexity of a Conjunctive Query (CQ) is determined only by the way its variables are shared between atoms, reflected by its hypergraph. In particular, Yannakakis [18, 3] proved that a CQ is decidable in linear time when it is α-acyclic, i.e. its hypergraph is α-acyclic; Bagan et al. [2] even state: Any CQ is decidable in linear time iff it is α-acyclic. (under certai...

Salt-sensitive hypertension: if only it were as simple as rocket science.

What if feedback only counted if the learner used it?

Most teachers give written feedback because it is a required deliverable, like a checkout assistant handing every customer the printed receipt, even though few use them. However there is no point in giving feedback unless the learner uses it: modifies or actively reappraises something specific as a result. This paper explores the theoretical and practical implications of taking this as the star...