Computer-supported group formation enables educators to assign students to project teams. The focus in this paper is placed on gathering data about student attributes that are relevant in the context of specific course projects. We developed a method that automatically produces learner models from existing documents, by linking students to topics and estimating the levels of skill, knowledge, a...

The United States is currently recovering from a broad recession that is considered the longest-lasting economic downturn since World War II. Various indicators of economic strength, such as the unemployment rate and foreclosures, reached their worst showings in decades during the recession and the following months. The current state of the economy has continued to spark debate concerning wheth...

Motivated by the notion of reduced enveloping algebra, we introduce central reductions of universal enveloping Dalgebras of restricted Lie algebroids. In the case of a tangent Lie algebroid the central reductions are sheaves of twisted crystalline differential operators. For a nilpotent p-character of a classical semisimple Lie algebra, we discover a connection between the reduced enveloping al...

We review the superconformal properties of 2d matter coupled to gravity, and extensions thereof. Focusing on topological strings, we recall how the superconformal structure helps to provide a direct link between Liouville theory coupled to matter, and matrix models. We also construct an infinite class of new theories based on W -gravity.

This work combines semantic maps with hybrid control models, generating a direct link between action and environment models to produce a control policy for mobile manipulation in unstructured environments. First, we generate a semantic map for our environment and design a base model of robot action. Then, we combine this map and action model using the Motion Grammar Calculus to produce a combin...

Despite prolific research on IT business value, this stream of research still encounters considerable limitations such as inconsistent findings of the direct link between IT and firm profitability and the demonstration of the indirect relationship between IT and specific aspects of firm value without explicitly considering network environments. To overcome the limitations caused by utilizing th...

The objective of Entity Linking is to connect an entity mention in a text to a known entity in a knowledge base. The general approach for this task is to generate, for a given mention, a set of candidate entities from the base and determine, in a second step, the best one. This paper focuses on this last step and proposes a method based on learning a function that discriminates an entity from i...

The JHU HLTCOE participated in the Entity Linking and Cold Start Knowledge Base tasks in this year’s Text Analysis Conference Knowledge Base Population evaluation. We have previously participated in TAC-KBP evaluations in 2009, 2010, 2011, and 2012. Our primary focus this year was on the Cold Start task; improvements to our existing KELVIN system included consolidating slot values for an entity...

In this paper we describe our participation in the Knowledge Base Population (KBP) track at TAC 2011. The architecture of our slot filling system is the same as last year. We mainly focus on developing a new system for the cross-language entity linking task. We compare the performance of monolingual retrieval and cross-lingual retrieval for entity linking. For NIL entity clustering, we group re...

This paper describes our system for SemEval2015 Task 13: Multilingual All-Words Sense Disambiguation and Entity Linking. We have participated with our system in the sub-task which aims at monolingual all-words disambiguation and entity linking. Aside from system description, we pay closer attention to the evaluation of system outputs.