Browsing by Author "Eshetu, Brook"

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    Amharic Question Answering for list questions: A case of Ethiopian tourism
    (Addis Ababa University, 2013-06) Eshetu, Brook; Teferra, Solomon (PhD)
    A Question answering (QA) system searches a large text collection and finds a short phrase or sentence that precisely answers a user's question. To solve a QA problem, we might first turn to traditional IR techniques, which have been applied successfully to large scale text search problems. Alternatively, the Natural Language Processing (NLP) and Information Extraction (IE) communities have developed techniques for extracting very precise answers from text. QA research attempts to deal with a wide range of question types including: fact, list, definition, How, Why, hypothetical, semantically constrained, and cross-lingual questions. This research work focuses on list questions in closed domain Amharic questions answering (AQA). It applies the hypothesis, which states that answers to a list questions have same semantic entity class, answers that co-occur within the sentences of the documents are related to the target and the question and sentences containing the answers share similar context. In this research work, list questions are answered using five major modules. The function of these modules are (1) determining the answer type, (2) document retrieval, (3) Extract answer candidates from the document, (4) computing similarity value for each pair of candidate answers based on their co-occurrence within the sentence, (5) selecting final answers. The QA system is evaluated and the experimental results show that the system registered an average of 57.5% F-score. Nevertheless, the performance of the system is greatly affected by the number for documents in the document database and techniques applied. As a result, we managed to develop a prototype for Amharic listing QA system in the area of Ethiopian tourism. KEYWORDS: Amharic Question Answering, List Questions, Answer Type, Candidate Answers, Co-occurance, Question Answering Evaluation.
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    Website usability and its effect on online purchase intention The case of Ethiopian Airlines
    (Addis Ababa University, 2020-06) Eshetu, Brook; Kebede, Hailemariam (PhD)
    This research thoroughly studied the effect of website usability on online purchase intention and the official website of Ethiopian airlines. www.ethopianairliens.com, was selected to analyze this relationship. The principal aim is to identify major variables which significantly affect purchase intention. For this ambition, various literatures were used to discuss the relation between the dependent and the independent variable. The study used WEBUSE development model (Content, organization and readability, Navigation & Links, User interface design and Performance and effectiveness) in order to measure website usability. The model was also used for the development of the conceptual framework and hypothesis construction. To investigate online purchase intention, technology oriented and social oriented perspectives are used. Using explanatory research design, a questionnaire was shared in travel and tourist guide groups found in different social medias with the intention of tracing online customers of Ethiopian airlines. A total of 385 clean data records were analyzed using descriptive and inferential statistical analysis via SPSS Version 20. Based on the analyzed data it is observed that "Content, organization & readability” and “Navigation & Links has week relation with online purchase intention. In contrast, “User interface design” and “Performance and effectiveness” showed strong relation with online purchase intention. From this the researcher suggested that the company should give great emphasis on improving the two aspects of website usability that have significant relationship with the purchase intention of online customers which will in turn affect the sales volume of the company