Learn More
Aiming to achieve sensing coverage for a given Area of Interest (AoI) in a People-Centric Sensing (PCS) manner, we propose a concept of (α, T)-coverage of the target field where each point in the field is sensed by at least one node with probability of at least α during the time period T. Our goal is to achieve (α, T)-coverage by a(More)
Mobile Ad Hoc Networks (MANETs) can be used to provide mobile users temporary infrastructure to use services such as database retrieval service when traditional infrastructure-based networks are unavailable in infrastructure-less situations (e.g. after a destructive disaster like an earthquake). The challenging task in such dynamic environments is how we(More)
One hundred and ninety-six symptomatic Saudi patients with dyspepsia underwent gastroscopy, and multiple biopsies were taken from the antrum of the stomach for identification of Helicobacter pylori. Three methods were studied for diagnosis of Helicobacter pylori, including urease test, culture and histopathology. The commonest gastroscopic findings were(More)
Twenty-five adult patients with liver cirrhosis, and another 30 patients with no liver disease but referred with symptoms suggestive of gastroesophageal reflux disease were selected at random. Twenty-four hour ambulatory intra-esophageal pH measurement and upper gastrointestinal endoscopy were carried out on all patients recruited. Applying the former test,(More)
Over the past 8 years, 820 patients with tuberculosis were seen at the Armed Forces Hospital, Riyadh, Kingdom of Saudi Arabia. A total of 292 of these patients (35.6%) had pulmonary tuberculosis, and 130 patients (15.8%) had alimentary tract tuberculosis, making this the second commonest site of involvement. In these 130 patients, the disease was located in(More)
At the Riyadh Armed Forces Hospital (RAFH), 352 patients had gastroscopy and from each, antral gastric biopsies were taken for identification of Helicobacter pylori, by urease test and histopathology. In 217 (61.64%) of these 352 patients, the histology specimens showed Helicobacter pylori in 73.68% of patients with duodenal ulcer, 70% of patients with(More)
Forty-two patients with hepatocellular carcinoma (HCC) were seen during two years at Riyadh Armed Forces Hospital (RAFH), Saudi Arabia. As viral hepatitis is common in this country, serological markers for hepatitis B virus (HBV) and the newly identified hepatitis C virus (HCV) were also studied in these patients. Fourteen (33.3%) patients were HBsAg(More)
Cardiovascular disease remains the leading cause of mortality and morbidity despite the identification of major risk factors and risk reduction strategies. Myocardial infarction (MI) is a relevant cardiovascular worldwide event for morbidity and mortality. In most cases, sudden cardiac death is triggered by ischemia-related ventricular tachyarrhythmia and(More)