Objective:To study the prevalence of red-green colour blindness among students; staff members and others working in Mosul college of medicine. Method: This cross sectional study was performed in Mosul college of medicine during the period from March 2007-March 2008. One thousand fifty five (1055) persons of both sexes were interviewed to Ishihara colour test which is the most often used to diagnose Red-Green colour blindness. The participants were college students , staff members and clercks of college . Results: Fifty four showed (5.1%) men and 0.37% women had red-green colour blindness. It was seen that 176 persons from the total sample (1055) had refractive error; only one person (0.56%) out of these 176 showed Red-Green colour blindness. Conclusion: The present study showed that colour blindness is a not uncommon problem among people and with the advance of modern life it is getting a source of difficulties and despair with distinguishing colours, example traffic lights , work on computer , … ect. Our ambition is to carry out more detailed studies for which the present study may open the door for more collaborative studies with other departments specially psychological in order to lessen such problem facing coulor blind people.
Due to its importance in physics and applied mathematics, the non-linear Sturm-Liouville problems witnessed massive attention since 1960. A powerful Mathematical technique called the Newton-Kantorovich method is applied in this work to one of the non-linear Sturm-Liouville problems. To the best of the authors’ knowledge, this technique of Newton-Kantorovich has never been applied before to solve the non-linear Sturm-Liouville problems under consideration. Accordingly, the purpose of this work is to show that this important specific kind of non-linear Sturm-Liouville differential equations problems can be solved by applying the well-known Newton-Kantorovich method. Also, to show the efficiency of applying this method to solve these problems, a comparison is made in this paper between the Newton-Kantorovich method and the Adomian decomposition method applied to the same non-linear Sturm-Liouville problems under consideration in this work. As a result of this comparison, the results of the Newton-Kantorovich method agreed with the results obtained by applying Adomian’s decomposition method.
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