Browsing by Author "Samarasinghe, N."

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Code mixing in the field of tuition particularly in Economics and Biology classes in Kiribathgoda area
(Department of English, University of Kelaniya, 2015) Awanthika, T.; Hapuarachchi, P.; Ihalagama, H.; Samarasinghe, N.
Human language is the most effective medium of communication. Variations appear in the process of its development due to its mutability. Code mixing is an important concept in sociolinguistics and it is a highly discussed phenomenon in Sri Lankan speech. Moreover, code mixing is commonly used by bilingual speakers in different situations. Most of the Sinhala speakers mix Sinhala and English languages when communicating with others both intentionally and unintentionally. In fact, code mixing is the use of one language in another language, the mixing of two or more languages or language varieties in a speech. Many research studies on code mixing have been conducted in various fields such as fiction writing, broadcasting media, print media and advertising. However, no research has been conducted on code mixing in the field of tuition although it is prominently used in this field. Data for the study were collected through questionnaires and unstructured interviews which were conducted after analyzing them in order to gather in depth data. The sample included randomly selected group of teachers and students who are involved in the field of tuition particularly Biology and Economics in Kiribathgoda area. This study explores when and why code mixing is used in the field of tuition. In addition it investigates the advantages and disadvantages in using code mixing and its nature of occurrences.
Comparison of liver MRI R2(FerriScan®) VS liver MRI T2* as a measure of body iron load in a cohort of Beta Thalassaemia major patients
(BioMed Central, 2020) Padeniya, P.; Siriwardana, S.; Ediriweera, D.; Samarasinghe, N.; Silva, S.; Silva, I.; Ahamed, N.; Niriella, M.A.; Premawardhena, A.
ABSTRACT: To compare the similarity of the non-patented T2* and the high cost patented R2 (Ferriscan®) MRI techniques in the measurement of liver iron concentration (LIC) in heavily transfused patients with thalassaemia major in a real- life Sri Lankan hospital setup. We compared LIC measured by MRI, obtained 2 weeks apart, using both T2* and R2 techniques in 15 patients with beta thalassaemia major. They all had a history of > 100 units of blood transfusions life long and also a history of sub optimal chelation. MRI R2 and MRI T2* scan values showed a negative correlation (co-rrelation coefficient = - 0.63, p = 0.01) This correlation was strong in lower LICs and progressively decreased with upper LIC values. Thus a significant discrepancy was observed between median values of two MRI technologies (p = 0.0005) with T2* tending to underestimate iron overload especially in those with very high LIC identified by R2. The lack of concordance of T2* and R2 especially in those with very high reading on R2 suggest the potential errors in interpretations that can occur in "non-expert centres"; which are likely to lead to errors in clinical judgement on the intensity of chelation therapy needed. KEYWORDS: FerriScan®; Iron overload; Liver iron concentration; MRI; T2* scan.