https://repository.sustech.edu/handle/123456789/16681 Thu, 09 Apr 2026 00:48:52 GMT 2026-04-09T00:48:52Z https://repository.sustech.edu/handle/123456789/16691 Detection of Etiological Agents and Histopathological Changes Associated with Appendicitis Mohamed,Mohamed Siddig AbdelAziz; Rehab Elmahdy Elfaki In this descriptive hospital based study, appendix samples were collected from 74 patients after appendectomy. These were fixed in 10% formal saline and prepared in paraffin blocks. Sections were prepared and stained with four different methods: Hematoxylin and eosin (H&E) for general morphology, Gram stain for bacteria, Macchiavello�s stain for viral inclusion bodies and periodic acid- Schiff�s reaction for fungi.The age of patients ranged from 1-47 years (mean age 19.3) years; 81% of the cases occurred in patients below 30 years of age, with male/female ratio of 1.5:1.0. Histopathologically, 48(64.8%) of the cases were diagnosed as acute appendicitis, 9(12.1%) as chronic appendicitis while 17(22.9%) of cases showed no detectable pathology. Intranuclear inclusions (suggesting viral infection) were seen in 17 (23%) of cases; 10 (13.5%) of cases showed presence of bacteria, one case (1.3%) had parasites (Ascaris Lumbericoides), and none had fungal infection. In conclusion the study indicated that acute appendicitis was more frequently encountered than chronic appendicitis and that bacterial and viral infections may be associated with appendicitis, especially the acute form. The age group 11-20 years was the most frequently. No relation was found between chili and lemon consumption and family history of appendicitis. article Sun, 01 Jan 2012 00:00:00 GMT https://repository.sustech.edu/handle/123456789/16691 2012-01-01T00:00:00Z https://repository.sustech.edu/handle/123456789/16689 Time Saving in Medical Imaging Services Integrating Digital Imaging with Six Sigma Concept El-sheikh,Mohamed Ahmed; Shamboul M. Adlan; Alnazier . Hamza The aim of this study was to identify the impact of Six Sigma (6?) implementation in a radiology setting with radiology information system (RIS), Picture Archiving and Communication System (PACS) facilities compared to traditional department. Six Sigma methodologies were used to analyze the processes, reduce the non-value added steps, improve the processes and calculate the return of investment (ROI). Radiology exam turnaround time and patients flow, before and after the PACS implementation were analyzed and values were statistically tested to assess workflow and productivity improvements. Statistical elaboration of the collected data showed that the reduction in flow time was 56% and the decrease in report time was 75% when RIS/PACS was used compared to traditional department flow and report turnaround time (RTT). Implementation of six sigma in a digital department with RIS and PACS will improve the quality of performance to an unrecorded level. article Sun, 01 Jan 2012 00:00:00 GMT https://repository.sustech.edu/handle/123456789/16689 2012-01-01T00:00:00Z https://repository.sustech.edu/handle/123456789/16690 Approximation of Symmetric Diffusion Contraction Semigroups and Kernels Abd Allah,Shawgy Hussien; Ria . Hassan We give an operator norm estimate of diffusion contraction Semigroups on with corresponding diffusion kernels associated with uniformly elliptic operators with measurable coefficients and limitting Markov transition semigroup on the state space . article Sun, 01 Jan 2012 00:00:00 GMT https://repository.sustech.edu/handle/123456789/16690 2012-01-01T00:00:00Z https://repository.sustech.edu/handle/123456789/16686 The Possibility of Utilizing a Nano and Micro Rectangular Waveguide as a Solar Cell and a Lasing Cavity Abdelrahman, A. H; Abdella M. D In this work the expression of the absorption coefficient of a rectangular waveguide, which is dependent on its dimensions, was utilized to show the conditions under which this guide act as a nano solar cell. It was shown that such guide can act as an optical amplifier for a solar cell on a nano scale. This expression can also considered as an expression of the energy for a particle in a box. article Sun, 01 Jan 2012 00:00:00 GMT https://repository.sustech.edu/handle/123456789/16686 2012-01-01T00:00:00Z