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  Partner: UNT College of Engineering
 Collection: UNT Scholarly Works
Instance Based Learning with Automatic Feature Selection Applied to Word Sense Disambiguation

Instance Based Learning with Automatic Feature Selection Applied to Word Sense Disambiguation

Date: August 2002
Creator: Mihalcea, Rada, 1974-
Description: This paper discusses instance based learning with automatic feature selection applied to word sense disambiguation. Abstract We describe an algorithm for Word Sense Disambiguation (WSD) that relies on a lazy learner improved with automatic feature selection. The algorithm was implemented in a system that achieves excellent performance on the set of data released during the SENSEVAL-2 competition. We present the results obtained and discuss the performance of various features in the context of supervised learning algorithms for WSD.
Contributing Partner: UNT College of Engineering
Integrating Knowledge for Subjectivity Sense Labeling

Integrating Knowledge for Subjectivity Sense Labeling

Date: May 2009
Creator: Gyamfi, Yaw; Wiebe, Janyce M.; Mihalcea, Rada, 1974- & Akkaya, Cem
Description: This paper discusses integrating knowledge for subjectivity sense labeling. Abstract: This paper introduces an integrative approach to automatic word sense subjectivity annotation. We use features that exploit the hierarchical structure and domain information in lexical resources such as WordNet, as well as other types of features that measure the similarity of glosses and the overlap among sets of semantically related words. Integrated in a machine learning framework, the entire set of features is found to give better results than any individual type of feature.
Contributing Partner: UNT College of Engineering
Intra-Class Competitive Assignments in CS2: A One-Year Study

Intra-Class Competitive Assignments in CS2: A One-Year Study

Date: July 2006
Creator: Garlick, Ryan & Akl, Robert G.
Description: This paper discusses intra-class competitive assignments in CS2. Abstract: The widespread goals of student retention, introducing larger programming projects, and fostering collaboration among students in computer science courses has led to the inclusion of group projects in many curricula, with task division and collaboration as motivation for students to complete assignments. This paper presents a study in a first-year programming assignment with similar goals, but with methods adopting the contrarian view - having students directly compete with one another in a tournament of their respective software agents. This paper presents the results of a year-long experiment in an intra-class competitive assignment in the second C++ programming course at the University of North Texas in Denton. Metrics of student performance on the assignment, correlation with course grade, student surveys of the project, and retention statistics are presented. Results demonstrating overwhelmingly positive response and high levels of effort among students are submitted, along with remarks on application to student recruiting, retention, and curriculum design.
Contributing Partner: UNT College of Engineering
Investigations in Unsupervised Back-of-the-Book Indexing

Investigations in Unsupervised Back-of-the-Book Indexing

Date: May 2007
Creator: Csomai, Andras & Mihalcea, Rada, 1974-
Description: This paper discusses investigations in unsupervised back-of-the-book indexing. Abstract: This paper describes our experiments with unsupervised methods for back-of-the-book index construction. Through comparative evaluations performed on a gold standard data set of 29 books and their corresponding indexes, the authors draw conclusions as to what are the most accurate unsupervised methods for automatic index construction. We show that if the right sequence of methods and heuristics is used, the performance of an unsupervised back-of-the-book index construction system can be raised with up to 250% relative increase in F-measure as compared to the performance of a system based on the traditional tf*idf weighting scheme.
Contributing Partner: UNT College of Engineering
An Iterative Approach to Word Sense Disambiguation

An Iterative Approach to Word Sense Disambiguation

Date: May 2000
Creator: Mihalcea, Rada, 1974- & Moldovan, Dan I.
Description: This paper discusses an iterative approach to Word Sense Disambiguation. Abstract: In this paper, we present an iterative algorithm for Word Sense Disambiguation. It combines two sources of information: WordNet and a semantic tagged corpus, for the purpose of identifying the correct sense of the words in a given text. It differs from other standard approaches in that the disambiguation process is performed in an iterative manner: starting from free text, a set of disambiguated words is built, using various methods; new words are sense tagged based on their relation to the already disambiguated words, and then added to the set. This iterative process allows us to identify, in the original text, a set of words which can be disambiguated with high precision; 55% of the verbs and nouns are disambiguated with an accuracy of 92%.
Contributing Partner: UNT College of Engineering
A Language Independent Algorithm for Single and Multiple Document Summarization

A Language Independent Algorithm for Single and Multiple Document Summarization

Date: October 2005
Creator: Mihalcea, Rada, 1974- & Tarau, Paul
Description: This paper discusses a language independent algorithm for single and multiple document summarization. Abstract: This paper describes a method for language independent extractive summarization that relies on iterative graph-based ranking algorithms. Through evaluations performed on a single document summarization task for English and Portuguese, we show that the method performs equally well regardless of the language. Moreover, we show how a meta-summarizer relying on a layered application of techniques for single-document summarization can be turned into an effective method for multi-document summarization.
Contributing Partner: UNT College of Engineering
Language Independent Extractive Summarization

Language Independent Extractive Summarization

Date: July 2005
Creator: Mihalcea, Rada, 1974-
Description: This paper discusses language independent extractive summarization. Abstract: We demonstrate TextRank - a system for unsupervised extractive summarization that relies on the application of iterative graph-based ranking algorithms to graphs encoding the cohesive structure of a text. An important characteristic of the system is that it does not rely on any language-specific knowledge resources or any manually constructed training data, and thus it is highly portable to new languages or domains.
Contributing Partner: UNT College of Engineering
Laser Machining of Structural Ceramics: An Integrated Experimental and Numerical Approach for Surface Finish

Laser Machining of Structural Ceramics: An Integrated Experimental and Numerical Approach for Surface Finish

Date: March 2, 2013
Creator: Vora, Hitesh D. & Dahotre, Narendra B.
Description: This poster received 1st place in the 2013 Graduate Exhibition in the Engineering category. Abstract: High energy lasers emerged as an innovative and potential industrial tool to fabricate complex shapes on structural ceramics which is otherwise difficult using conventional machining techniques. However, obtaining a desired surface finish at higher material removal rate during laser machining of structural ceramics is still a critical issue. In this situation, the better understanding of various physical phenomena such as heat transfer, fluid flow, recoil pressure, Marangoni convection, and surface tension and its influence on the evolution of typical surface topography during laser machining could be more helpful. In light of this, this study was attempted to present the state of the art of laser machining of alumina using an integrated experimental and computational approach. A multistep computational model based on COMSOL™ Multiphysics was developed to study the effect of various physical phenomena on the generation of surface topography for various laser machining conditions. Furthermore, this process model can be used as a handy tool for the process engineers to configure the process variables (laser power, scanning speed, pulse rate, size of overlap) to obtain the specified quality characteristics. The surface topography of laser machined ...
Contributing Partner: UNT College of Engineering
LASSO: A Tool for Surfing the Answer Net

LASSO: A Tool for Surfing the Answer Net

Date: November 1999
Creator: Moldovan, Dan I.; Harabagiu, Sanda M.; Paşca, Marius. 1974-; Mihalcea, Rada, 1974-; Goodrum, Richard A.; Gîrju, Corina R. et al
Description: This paper discusses LASSO, a tool for surfing the answer net. Abstract: This paper presents the architecture, operation and results obtained with the LASSO system developed in the Natural Language Processing Laboratory at SMU. The system relies on a combination of syntactic and semantic techniques, and lightweight abductive inference to find answers. The search for the answer is based on a novel form of indexing called paragraph indexing. A score of 55.5% for short answers and 64.5% for long answers was achieved.
Contributing Partner: UNT College of Engineering
Learning Multilingual Subjective Language via Cross-Lingual Projections

Learning Multilingual Subjective Language via Cross-Lingual Projections

Date: June 2007
Creator: Mihalcea, Rada, 1974-; Banea, Carmen & Wiebe, Janyce M.
Description: This paper discusses learning multilingual subjective language via cross-lingual projections. Abstract: This paper explores methods for generating subjectivity analysis resources in a new language by leveraging on the tools and resources available in English. Given a bridge between English and the selected target language (e.g., a bilingual dictionary or a parallel corpus), the methods can be used to rapidly create tools for subjectivity analysis in the new language.
Contributing Partner: UNT College of Engineering