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334 results on '"Mohamed, R.M."'

4. A comparative survey on LEACH successors clustering algorithms for energy-efficient longevity WSNs

Author

Mai Hussain Ahmed Hussain, Bassem Mokhtar, and Mohamed R.M. Rizk

Subjects
Wireless Sensor Networks, Hierarchical routing protocols, LEACH, Cluster Head., Fuzzy Logic, Energy efficiency, Electronic computers. Computer science, QA75.5-76.95
Abstract

Wireless Sensor Network (WSN) has appeared as a significant study field integrated with much research in the last two decades. In response to the widespread use of this technology in numerous applications, such as military operations, medical care, automated processes, urban domain and so on. WSN handles conditions where it is challenging or impossible for humans to perform measurement tasks physically and effectively. WSNs are fast-expanding networks incorporating many data communications streams. A WSN is made up of a wide amount of economic sensing device nodes with low energy requirements that have been irregularly placed in a particular region. These sensor node devices periodically sense data and record values before sending them to the sink node (or base station) through other sensor nodes. Some concerns should be addressed, such as preserving the sensor nodes' activity and load balancing as much as possible by wisely distributing the overall energy and the significant duplication problem of generated data where some sensor nodes in the monitor region may provide similar data. These are the WSN's most fundament l issues, necessitating the development of new routing and clustering algorithms. Research has proposed several routing algorithms to respond to these challenges and several optimization methods to decide the best route between the broadcaster and reception nodes. LEACH and its various versions with hierarchical clustering are widely utilized to reduce energy consumption, optimize performance, and lengthen the network's longevity. In this survey, We present an in-depth evaluation of LEACH descendant clustering protocols to respond to the previous challenges. We suggest several optimization methods to decide the best route between the broadcaster and reception nodes. Our qualitatively comparative study and analysis organize LEACH-based routing algorithms into five categories: algorithms for optimizing CH selection, algorithms for optimizing data transmission, algorithms for optimizing both CH selection & data transmission, algorithms executed by fuzzy logic approach, and algorithms that use external energy sources to maximize network energy. Moreover, the survey compares these clustered routing techniques based on these criteria. An examination of algorithms is provided, including information on their goals, categories, strategies, assessments, effectiveness, advantages, and disadvantages. This survey gives academics technical guidance regarding the best way to improve algorithms for routing. The publication concludes with suggestions for additional areas of WSN to investigate.

Published
2024
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50. Value of Triplicated Inferior Pedicle Breast Reduction in Improving Cosmetic Outcome in Upper Outer Quadrant Breast Cancer Patients

Author

Kamal Mamdoh Kamal Elsaid, Ahmed M. Gad Mohamed R.M. Abo Shady, and Samy A. Abd El Rahman Ahmed G. Osman

Subjects
medicine.medical_specialty, business.industry, medicine.medical_treatment, Scars, medicine.disease, Inferior pedicle, Surgery, Breast cancer, Medicine, Inframammary fold, Breast reduction, medicine.symptom, Complication, Upper outer quadrant, business, Prospective cohort study
Abstract

Background: Breast is the true mirror of femininity. Breast cancer is one of the diseases that affect the psychological state of women, not only because of the complications it entails, but also because of the negative impact of treatment on women psychologically and physically. Aim of Study: The aim of this work is to assess the effect of triplicated inferior pedicle technique on improving cosmetic outcome in patients with breast cancer in upper outer quadrant. Patients and Methods: This study conducted at Ain Shams University hospitals, starting January 2020 till May 2020 with follow up 6 months.The study include 15 patients from 30- 50 year. This prospective study started with 15 Female patients with breast cancer in upper outer quadrant or upper pole lesion. During the period of the study at Ain-Shams University Hospitals. The data was collected and presented as followed in several tables and figures. Results: In our study the mean value of immediate post-operative SN-N was 21cm. After 6 months the mean value of postoperative SN-N was 21.5cm. In the current study the mean value of preoperative inframammary fold- nipple distance (IMF-N) was 17.27cm. In our study mean value of immediate postoperative IMF-N was 7.33cm, and After 6 months the mean value of postoperative IMF-N was 8cm. So, triplicated inferior pedicle is to obtain the benefits and avoid the most annoying complication and maintain the shape of breast after breast reduction without significant difference in postoperative complications. Conclusion: Breast reduction is a procedure, which has evolved tremendously over the years due to the continuous and ongoing quest to achieve the objective of reducing the breast size, improving breast shape and relocating the nipple areola complex, while minimizing scars and also preserving lactation and innervation to the nipple-areola complex.

Published
2021
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