Integrated Modular Avionics (IMA) architecture provides means for integrating multiple safety-critical applications on a shared hardware in an airborne system. Error free data transfer between different modules of an IMA cabinet is an issue of critical importance. ARINC 659 has proven to be one of the most comprehensive standards for intra-cabinet data transfer within an IMA cabinet of commercial aircrafts. This paper presents a Hardware Descriptive Language (HDL) based modular design and implementation details of the ARINC 659 Line Replaceable Modules (LRM) for backplane data bus communication. LRM consists of two major modules; Bus Interface Unit (BIU) and Host. BIU is used to achieve control functions, state management, synchronization and data transfer on the backplane data bus. Modular approach has been adopted in the design of BIU. Whereas, the functionality of Host is to provide the data to be transferred, monitor BIU activities and ensure error free transmission of the required data through BIU. Altera's NIOS soft processor core is configured to realize the functionality of the Host. A Direct Memory Access (DMA) interface is used to manage data transfer tasks from Host to Inter Module Memory (IMM) of BIU. The results show that it is highly probable to use FPGA with safety critical soft microprocessor core for practical implementation of the said standard.
Background and Objective: An appendectomy is the surgical removal of the vermiform appendix. Laparoscopic Appendectomy is increasingly performed these days. Direct studies on comparison of complication rates of periumbilical and intraumbilical incision are lacking. The objective was to compare the frequency of infective complications of two different types of laparoscopic appendectomy incisions i.e. periumbilical incision versus intraumbilical.
Methods: This retrospective study was carried out at Department of Surgery, Our Lady of Lourdes Hospital, Drogheda, Ireland for 6 months (From 27.05.2015 to 26.11.2015). Medical records of 1044 patients who had Laparoscopic Appendectomy from 2010 to 2014 were analyzed. Their Preoperative, Intraoperative, Postoperative and clinical notes were reviewed. This included patients who underwent laparoscopic appendectomy with periumbilical incision technique and those who were operated with intraumbilical incision technique. All the data was analyzed using computer software SPSS version 21.
Results: The mean age of the patients was 40.38±11.76 years. Ratio of Male to female was 1.6:1. The erythema was observed in 31.42% patients, edema was present in 242(23.2%), pain was present in 278(26.6%) and the purulent discharge was noted in 294(28.2%) patients. Overall wound infection was found in 16.86% patients. In intra umbilical group wound infection was found in 7.28% of patients while this rate was 26.44% in peri umbilical group. Statistically significant difference was found between the study groups i.e. p-value=0.000.
Conclusion: Intraumbilical incision is a safer and feasible substititute for the periumbilical incision, and it promises better outcomes.
doi: https://doi.org/10.12669/pjms.37.5.4551
How to cite this:Kamal Z, Aleem M, Aziz N, Amjad HM. Medical Teaching Institutions Reforms Act: Facts and Fictions. Pak J Med Sci. 2021;37(5):1252-1253. doi: https://doi.org/10.12669/pjms.37.5.4551
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