Abstract
Abstract This study explores the rhetorical structure and linguistic features of research article abstracts in an applied discipline. Recently, many emerging applied disciplines have evolved to incorporate knowledge from a variety of disciplinary areas. Therefore, the writing style may vary within one discipline. While most studies have compared rhetorical variations between disciplines, few have examined sub-disciplinary variations. The purpose of this study is to investigate the extent to which variations exist among research article abstracts in three sub-fields of one applied discipline: marine engineering. A small specific corpus consisting of 60 marine engineering abstracts was compiled. By examining similarities and differences in the rhetorical structure, frequently used verbs, tense, and the use of first person pronouns, the analysis showed that sub-disciplinary variations existed among the three sub-fields. For example, the abstracts in the sub-field of automatic control (a discipline closely related to electronic engineering) differ from the abstracts of the other two sub-fields as for rhetorical structure, verb tense, and frequency of use of first-person pronouns. The findings of this study indicate that English for Specific Purposes (ESP) instructors should take into account sub-disciplinary preferences when teaching academic writing so that students can make informed choices when writing in their specific sub-field.
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