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    Anaphora Resolution in Software Requirements Engineering: A Comparison of Generative NLP Pipelines and Encoder-Based Models
    (Institute of Electrical and Electronics Engineers Inc., 2024) Yildirim, Savas; Malik, Garima; Cevik, Mucahit; Basar, Ayse
    In the field of requirements engineering (RE), anaphoric ambiguity can negatively impact the quality of requirements and could even threaten the success of a project. If different stakeholders like testers or customers interpret software requirements differently, the system might fail to pass the customer validation stage. On the other hand, a robust anaphora resolution model clarifies the writing process of requirements by accurately indicating the pronoun references. In this study, we exploited the power of generative NLP pipelines and compared their performance with the extractive Question Answering (or sequence labeling) technique. We conducted extensive numerical experiments including text-to-text pipelines and compared them with encoder-based models on two public requirements datasets. Our experiments revealed that a sufficiently large T5 model can yield better results than encoder-based models. We've utilized methods such as Lora to effectively address the complexity of training large language models. Our study indicated that the generative approach outperforms classification-based models for anaphora resolution tasks in Software Requirement texts. © 2024 IEEE.
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    Sequence Labeling for Disambiguating Medical Abbreviations
    (Springernature, 2023) Cevik, Mucahit; Jafari, Sanaz Mohammad; Myers, Mitchell; Yildirim, Savas
    Abbreviations are unavoidable yet critical parts of the medical text. Using abbreviations, especially in clinical patient notes, can save time and space, protect sensitive information, and help avoid repetitions. However, most abbreviations might have multiple senses, and the lack of a standardized mapping system makes disambiguating abbreviations a difficult and time-consuming task. The main objective of this study is to examine the feasibility of sequence labeling methods for medical abbreviation disambiguation. Specifically, we explore the capability of sequence labeling methods to deal with multiple unique abbreviations in a single text. We use two public datasets to compare and contrast the performance of several transformer models pre-trained on different scientific and medical corpora. Our proposed sequence labeling approach outperforms the more commonly used text classification models for the abbreviation disambiguation task. In particular, the SciBERT model shows a strong performance for both sequence labeling and text classification tasks over the two considered datasets. Furthermore, we find that abbreviation disambiguation performance for the text classification models becomes comparable to that of sequence labeling only when postprocessing is applied to their predictions, which involves filtering possible labels for an abbreviation based on the training data.