Global Journal of Human Social Science, G: Linguistics and Education, Volume 23 Issue 3

gap. Step 2 is the summary of the purpose, which includes the statement about the purpose and introduction of the study. Since the main function of the conclusion section is to summarize the main claim of the study, Move 1 is a necessary one to be included in the conclusion section. Tracing back to the original text, after introducing the background information in Step 1, the author usually shows the purpose of their study in the following Step. One interesting finding is that not every conclusion section has Step 1 because this Step is usually found in the abstract and introduction sections of an article, we usually do not find it necessary to repeat the background information related to the study in the conclusion section since background knowledge is a consensus between writers and readers. However, the background information in the conclusion section is shorter than in the abstract and introduction sections and is mostly aimed more at helping the reader better understand the author’s research. This Step is not a necessary one for the conclusion. If the author uses this Step in Move 1, it is usually found at the beginning of the conclusion section (Zhiqing Hu, 2007). While Step 2 in Move 1 seems to be conventional, which accounts for 88%. There are some typical expressions in Move 1: Example one: The flow field around an oscillating, straked delta wing was analyzed numerically. (Move 1: Step 1: Summary of Background) Example two: In this work, the ability of the harmonic balance method to deal with transonic buffet flows has been evaluated. (Move 1: Step 2: Summary of Study) c) Move 2: Evaluation of Study The total Frequency of Move 2 accounts for 82% of the corpus, showing that most of the conclusion section includes an evaluation of their research. Specifically, Step 1 in Move 2 is 60%, and Step 3 accounts for 72%, which are higher than Step 3. The statistic shows that Step 1 and 2 in Move 2 is conventional, only 22 pieces contain Step 3, proving that this step is not a required Step in Move 2. The above results corresponds with Zhiqing Hu’s (2007) research. Move 2 aims to evaluate the research method, result, and limitation or contribution of the study. In the first Step, the authors outline the main steps and procedure of the study. Since the papers we selected are from aerospace journals, many of the papers in which the authors have built models performed experiments, or formulate formulas. Therefore, in this Move, the authors describe how the model was built or how the experiments were conducted, and what methods were used in this study. What’s more, the evaluation of results is also presented after the explanation of the research method, the authors summarize the main empirical experimental results, often in the form of a logical order by using “first”, “second”. Then, the evaluation of limitations or contributions will be given. This Step aims to point out the main contribution or limitation of the study. The author indicates the validity, significance, merits, and practical applications of the study, or indicates what is not solved in the study, or the circumstance under which their research is not applicable (Zhiqing Hu, 2007). The following are some typical expression of these Move and Steps: Example two: These numerical simulations were obtained using 1200 cores of the NASAs Pleiades supercomputer during three weeks, i.e., approximately 6 × 105 core-hours. Comparison to measurements within arc heaters, such as those of Winter et al. (Move 2: Step 1: Evaluation of method) Example three: It has been shown that a combination of surface properties, in particular topography and chemistry, need to be optimised in order to effectively mitigate insect residue adhesion . (Move 2: Step 2: Evaluation of result) Example Four: The propellant studies were limited to available literature data on well-known ionic liquids, so future research should focus on creating novel liquid propellants designed specifically for multimode propulsion. (Move 2: Step 3: Evaluation of limitation) d) Move 3: Suggestion for Future Research Among 50 pieces, we found 18 pieces have Move 3, which shows that Move 3 is optional and less used in the conclusion section. Move 3 intends to provide direction for future research based on the author’s research. It usually appears at the end of the conclusion. Example Five: Future researchers should look to a cohesive comparative study of predictions made by each of the models, developed under a consistent framework and validated against a comprehensive experimental database. (Move 3: Suggestion for future research) V. C onclusion Successful writing of the conclusion section of a research article contributes to a thorough and understandable unfolding of the whole RA. With this being said, good writing of the conclusion is fundamental to the writers. This article reports on the result of the Move analysis of the aerospace conclusion section of RA. Based on the findings of the analysis, a modified two-level rhetorical structure (Moves and Steps) based on Yang & Allison (2003) and Zhiqing Hu (2005)s’ has been developed for aerospace conclusions. The study expands the application of move analysis to aerospace research articles, and yields a better and deeper understanding of the conclusion section of aerospace RA for scholars, raises genre awareness in academic writing, and facilitates them to take part in the international academic community. In addition to the theoretical contributions to discourse analysis, this study offers practical implications to those novice and non-native researchers in reading and © 2023 Global Journals Volume XXIII Issue III Version I 19 ( ) Global Journal of Human Social Science - Year 2023 G Move Analysis of Conclusion Section of Aerospace Research Article