Student responses to conceptual physics questions were analyzed with latent semantic analysis (LSA), using different text corpora. Expert evaluations of student answers to questions were correlated with LSA metrics of the similarity between student responses and ideal answers. We compared the adequacy of several text corpora in LSA performance evaluation, including the inclusion of written inco...

This paper describes our approach for the Community Question Answering Task, which was presented at the SemEval 2015. The system should read a given question and identify good, potentially relevant, and bad answers for that question. Our approach transforms the answers of the training set into a graph based representation for each answer class, which contains lexical, morphological, and syntact...

We present a query processing procedure for conjunctive queries in distributed ontology systems where a large ontology is divided into ontology fragments that are later distributed over a set of autonomous nodes. We focus on ontologies with large ABoxes. The query processing procedure determines and retrieves the facts that are relevant to answering a given query from other nodes, then construc...

In this paper, we introduce a partially automated method for generating intensional answers at multiple abstraction levels for a query, which can help database users find more interesting and desired answers. Our approach consists of three phases: preprocessing, query execution, and answer generation. In the preprocessing phase, we build a set of concept hierarchies constructed by generalizatio...

This work is about guiding the user web search by generating most relevant questions, answers and grammars from web documents. The proposed approach is based on the representation of the main domain concepts as a set of attributes and relating these attributes to the user models and to a syntactico-semantic taxonomy, that describes the general relationships between conceptual and linguistic kno...

Comparison of answers offered by a computer algebra system (CAS) with answers derived by a student without a CAS is relevant, for instance, in the context of computer-aided assessment (CAA). The issues of identity, equivalence and correctness emerge in different ways and are important for CAA. These issues are also interesting if a student is charged with the task of comparing the answers. What...