Browsing by Author "Adesina, Ademola O."
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Item Digital Watermarking: A State-of-the-Art Review(IST-Africa 2010 Conference Proceedings, 2010) Agbele, Kehinde K.; Adesina, Ademola O.; Nyongesa, Henry O.Digital watermarking is the art of embedding data, called a watermark, into a multimedia object such that the watermark can be detected or extracted later without impairing the object. Concealment of secret messages inside a natural language, known as steganography, has been in existence as early as the 16th century. However, the increase in electronic/digital information transmission and distribution has resulted in the spread of watermarking from ordinary text to multimedia transmission. In this paper, we review various approaches and methods that have been used to conceal and preserve messages. Examples of real-world applications are also discussedItem A Query-Based SMS Translation in Information Access System(International Journal of Soft Computing and Engineering (IJSCE), 2011-11) Agbele, Kehinde K.; Adesina, Ademola O.; Nureni, Azeez A.; Abidoye, Ademola P.Mobile technology has contributed to the evolution of several media of communication such as chats, emails and short message service (SMS) text. This has significantly influenced the traditional standard way of expressing views from letter writing to a high-tech form of expression known as texting language. In this paper we investigated building a mobile information access system based on SMS queries. The difficulties with SMS communication were explored in terms of the informal communication passage and the associated difficulty in searching and retrieving results from an SMS-based web search engine under its non-standardization. The query is a pre-defined phrase-based translated English version of the SMS. The SMS machine tool normalization algorithm (SCORE) was invented for the query to interface with the best ranked and highly optimized results in the search engine. Our results, when compared with a number of open sources SMS translators gave a better and robust performance of translation of the normalized SMS.Item Text messaging and retrieval techniques for a mobile health information system(Journal of information Science, 2014) Agbele, Kehinde K.; Adesina, Ademola O.; Abidoye, Ademola P.; Nyongesa, Henry O.Mobile phones have been identified as one of the technologies that can be used to overcome the challenges of information dissemination regarding serious diseases. Short message services, a much used function of cell phones, for example, can be turned into a major tool for accessing databases. This paper focuses on the design and development of a short message services-based information access algorithm to carefully screen information on human immunodeficiency virus/acquired immune deficiency syndrome within the context of a frequently asked questions system. However, automating the short message services-based information search and retrieval poses significant challenges because of the inherent noise in its communications. The developed algorithm was used to retrieve the best-ranked question–answer pair. Results were evaluated using three metrics: average precision, recall and computational time. The retrieval efficacy was measured and it was confirmed that there was a significant improvement in the results of the proposed algorithm when compared with similar retrieval algorithms.Item Text Messaging: a tool in e-Health Services(Medwell Journals, 2010) Agbele, Kehinde K.; Adesina, Ademola O.; Nyongesa, Henry O.HIV/AIDS continues to be a menace to the global community, especially in sub-Saharan Africa and South Africa is not an exception. The infection rate is continues to grow, in particular, among the young adults. Cell phones have been identified as one of the tools that can be used to overcome the challenge of information dissemination regarding HIV/AIDS among young adults because of its acceptability within this age group. Access to appropriate information can be a powerful for prevention and management of many chronic illnesses, including hypertension, diabetes and HIV/AIDS. Within the young adults age group information access by use of Short Messaging Services (SMS) becomes particularly appealing. In this regard, it is proposed to provide access to carefully screened information on HIV/AIDS within the context of frequently asked questions (FAQ) system. However, automating SMS-based information search and retrieval poses significant challenges because of the inherent noise in SMS communications. In the paper, a special corpus of SMS messages was collected based on a standardised question-answer collection. The SMS messages were then analysed, transcribed and classified, with the aim of building a dictionary of SMS-speak to English translations, with reference to HIV/AIDS.