Associations between hearing and blood lipids have been the focus of scientific inquiry for more than 50 years. The aim of the present study is to evaluate the association between hyperlipidaemia among patients presented with sudden sensorineural hearing loss compared to normal controls. A case control study concerned with 22 patients presented with sudden sensorineural hearing loss who underwent lipid profile evaluation. The lipid profile of these patients was compared with corresponding results of 55 age matched persons (volunteers) with normal hearing. These patients were collected from the Out Patient Department of ENT at Al-Jamhory Teaching Hospital, Mosul/Iraq and private clinic of the author for the period from February 2011 to July 2013. The average age of patients was 44.7 years with a range of 26-65 years. The peak age incidence was in the 5(th) decade of life. The study included 11 male patients (50 %) and 11 females (50 %). Meanwhile, the average age of the control group was 41.7 years with 25 (45.5 %) males and 30 (54.5 %) females. Statistical analysis showed that there was significant difference between the means of lipid profile and blood sugar of the patients and the control group apart from HDL where there was no significant difference. In conclusion, hyperlipidemia seems to be significantly associated with the occurrence of sudden sensorineural hearing loss according to this study.
The current research included obtaining the best performance specifications for a silicon device with a mono-crystalline type pn junction (pn–Si). A simulation of the device was performed by the use of a computer program in one dimension SCAPS-1D in order to reach the optimum thickness for both p and n layers and to obtain the best efficiency in performance of the pn-Si junction. The optimum device efficiency was eta (η) = 12.4236 % when the ideal thickness for the p and n layers was 5µm and 1.175µm, respectively (p=5 µm and n=1.75µm).
The research included studying the effects of different spectra of solar illumination using simulation of the device; the usual solar spectrum AM1_5 G1 sun. Spectrum, Black body spectrum, White spectrum constant photon flux, White spectrum constant photon power, Monochromatic spectrum constant flux, and Monochromatic spectrum constant power. The highest efficiency was obtained from the monochrome spectrum with constant power (eta (η) =22.4338 %). The effects of different temperatures on the device was studied on 250K, 300K, 350K, 400K, and 450K. The highest efficiency was revealed for Monochromatic spectrum constant power (eta (η) =24.5381 %) when the temperature was 250K.
Objectives: The aim of the present study is to evaluate the aetiology of secondary (referred) otalgia. Patients and methods: A case series study of 79 patients clinically diagnosed as secondary otalgia, collected from the Outpatient Department of ENT at Al-Jamhory Teaching Hospital, Mosul/IRAQ, and private clinics, for the period from Jan. 2010 to Sept. 2011. Results: The average age of the patients was 33.3 years with a range of 4-80 years. The peak age incidence was in the fourth decade of life. The study included 34 male patients (43.1%) and 45 females (56.9%) with a ratio of 1:1.3. Temporomandibular joint dysfunction was found to be the main cause of secondary otalgia (37.9%). Pharyngitis (24%), dental pain (17.7%) and cervical spine pain (7.6%) came next in that order. Conclusion: Temporomandibular joint dysfunction, pharyngitis, dental problems and cervical nerve root pain were the commonest causes of secondary otalgia. Moreover, upper aerodigestive tract malignancies should be considered in differential diagnosis.
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