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Search Results: 1 - 10 of 408357 matches for " Ahmed M. Elmogy "
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Market-Based Approach to Mobile Surveillance Systems
Ahmed M. Elmogy,Alaa M. Khamis,Fakhri O. Karray
Journal of Robotics , 2012, DOI: 10.1155/2012/841291
Abstract: The active surveillance of public and private sites is increasingly becoming a very important and critical issue. It is, therefore, imperative to develop mobile surveillance systems to protect these sites. Modern surveillance systems encompass spatially distributed mobile and static sensors in order to provide effective monitoring of persistent and transient objects and events in a given area of interest (AOI). The realization of the potential of mobile surveillance requires the solution of different challenging problems such as task allocation, mobile sensor deployment, multisensor management, cooperative object detection and tracking, decentralized data fusion, and interoperability and accessibility of system nodes. This paper proposes a market-based approach that can be used to handle different problems of mobile surveillance systems. Task allocation and cooperative target tracking are studied using the proposed approach as two challenging problems of mobile surveillance systems. These challenges are addressed individually and collectively. 1. Introduction One of the most active research topics is how to automate surveillance tasks based on mobile and fixed sensors platforms [1]. Many benefits can be anticipated from the use of multisensor systems in surveillance applications [2, 3], such as decreasing task completion time and increasing mission reliability. Generally, monitoring of public and private sites is the main application of multisensor surveillance systems. The primary objectives of the surveillance systems are to provide the information that makes the system able to understand and predict the actions and the interactions of the observed objects in order to carry out different tasks. Examples of these tasks would include target search, identification, and tracking. Advanced surveillance systems encompass spatially distributed mobile and static sensors in order to provide effective monitoring of persistent and transient objects and events in a given area of interest (AOI) [4]. Mobile surveillance systems incorporate self-organized networks of mobile sensing nodes of different modalities, data and information fusion nodes, acting nodes, and control nodes. These self-organized nodes can collaboratively and continuously sense within the volume of interest, as well as physically manipulate and interact with it. The main goal of the surveillance system is to adjust the sensing conditions for improved visibility, and thereby improve performance [5]. In such setting, surveillance is a complex problem posing many challenging problems. This paper
An Enhanced Indexing And Ranking Technique On The Semantic Web
Ahmed Tolba,Nabila Eladawi,Mohammed Elmogy
International Journal of Computer Science Issues , 2011,
Abstract: With the fast growth of the Internet, more and more information is available on the Web. The Semantic Web has many features which cannot be handled by using the traditional search engines. It extracts metadata for each discovered Web documents in RDF or OWL formats, and computes relations between documents. We proposed a hybrid indexing and ranking technique for the Semantic Web which finds relevant documents and computes the similarity among a set of documents. First, it returns with the most related document from the repository of Semantic Web Documents (SWDs) by using a modified version of the ObjectRank technique. Then, it creates a sub-graph for the most related SWDs. Finally, It returns the hubs and authorities of these document by using the HITS algorithm. Our technique increases the quality of the results and decreases the execution time of processing the user's query.
An Enhanced Indexing And Ranking Technique On The Semantic Web
Ahmed Tolba,Nabila Eladawi,Mohammed Elmogy
Computer Science , 2011,
Abstract: With the fast growth of the Internet, more and more information is available on the Web. The Semantic Web has many features which cannot be handled by using the traditional search engines. It extracts metadata for each discovered Web documents in RDF or OWL formats, and computes relations between documents. We proposed a hybrid indexing and ranking technique for the Semantic Web which finds relevant documents and computes the similarity among a set of documents. First, it returns with the most related document from the repository of Semantic Web Documents (SWDs) by using a modified version of the ObjectRank technique. Then, it creates a sub-graph for the most related SWDs. Finally, It returns the hubs and authorities of these document by using the HITS algorithm. Our technique increases the quality of the results and decreases the execution time of processing the user's query.
Electronic Health Record Data Model Optimized for Knowledge Discovery
Shaker H. El-Sappagh,Samir El-Masri,Alaa M. Riad,Mohammed Elmogy
International Journal of Computer Science Issues , 2012,
Abstract: Database is a core component the Electronic Health Record (EHR) system, and creating a data model for that database is challenging due to the EHR system special nature. Because of complexity, spatial, sparseness, interrelation, temporal, heterogeneity, and fast evolution of EHR data, modeling its database is complex process. This paper tried to build dynamic, complete and stable data model for EHR database. There are a little work and standards in this aspect because of its difficulty. We will use object relational modeling approach and entity attribute value with classes and relationships to build the model. This design facilitates and enhances the operations of data mining and decision support which is integrating component of an EHR system.
Kinetics and Modeling of H2S Removal in a Novel Biofilter  [PDF]
Zarook M. Shareefdeen, Wasim Ahmed, Ahmed Aidan
Advances in Chemical Engineering and Science (ACES) , 2011, DOI: 10.4236/aces.2011.12012
Abstract: Biofiltration has become a widely accepted technology for the removal of hydrogen sulfide (H2S) which is one of the major odor causing gases present in the air streams of municipal wastewater treatment facilities. In addition to odorous nature, H2S is toxic and corrosive. In this study, a biofilter which uses a novel media was employed in a pumping station which is closely located at the University City, Sharjah, UAE. The H2S removal performance data were collected and subsequently used in the determination of kinetics and modeling of H2S. The data were best represented by a first order biofilter model. Based on the first order kinetic constant, a correlation is developed to predict concentrations at the biofilter outlet. Based on the predicted outlet concentrations and dispersion (gaussian and US-EPA AERMOD) models, a study on H2S dispersion is conducted. The dispersion study confirmed a biofilter installation at the pumping station site would significantly reduce H2S levels in the University community and would provide cleaner air.
Clinical Outcome of Early Enteral Feeding on Patients Post Esophagectomy  [PDF]
Badawy M. Ahmed, Ahmed A. S. Salem
Journal of Cancer Therapy (JCT) , 2017, DOI: 10.4236/jct.2017.84029
Abstract: Objectives: Aim of our work is to study the effect of early enteral feeding through either nasoentral or feeding jejunostomy tube post esophagectomy on patients recovery and hospital stay. Background: Postoperative nutrition is a well known aspect of care in recent years and has been shown to decrease the incidence of complications and hospital stay. Enteral nutrition has been shown to be superior to parenteral nutrition as it is more physiological, safer, cheaper and early enteral nutrition has been clearly confirmed to reduce postoperative morbidity. Methods: This is randomized combined retrospective and prospective study that is conducted in surgical oncology department, South Egypt cancer institute, Assiut University; from October 2012 to October 2016. Patients in this study were divided into two groups: group 1 includes patients with feeding jejunostomy and group 2 is patients with nasoenteral tube. Results: 25 Patients included in this study (19 males & 6 females). All cases were primarily diagnosed as esophageal cancer, middle and lower 1/3 esophagus or proximal gastric carcinoma infiltrating cardia by clinical data associated with abdominal sonar and/or C.T scan and upper endoscopy with biopsy. There was no significant difference in catheter related complications (P value 0.238). There was no operative mortality. Conclusion: Early postoperative enteral nutrition was feasible and safe for patients undergoing esophagectomy. There is no significant difference between NE and FJ. Enteral nutrition either through nasoenteral or feeding jejunostomy is an effective method for postoperative nutritional support in this type of major surgery.
A Long-term Follow-up: Suture versus Mesh Repair for Adult Umbilical Hernia in Saudi Patients. A Single Center Prospective Study  [PDF]
Ahmed M. Kensarah
Surgical Science (SS) , 2011, DOI: 10.4236/ss.2011.23033
Abstract: Objective: To report results of mesh repair vs. the modified Mayo’s suture overlap in the surgical treatment of adult umbilical and paraumbilcal hernias in our medical center. Patients & Methods: The study is a Saudi single center single surgeon trial composed of sixty two patients. It was performed in the Surgical Department of King Abdul-Aziz University Hospital at Jeddah. The patients were randomly assigned into 2 groups. Group A patients underwent onlay mesh repair while modified Mayo’s repair was used in group B patients. Median follow-up was 28 months, and data were collected regarding size of hernia, type of the operation, complications, length of follow-up and the recurrence rate. Chi square test was used to compare results at 0.05 levels. Results: Complication was reported in 17% in group A and 8% in group B .There was no difference in scar pain, cosmetic result, and overall patient satisfaction between both groups. The recurrence rate was 10% for mesh repair and 18.8% for suture repair. Conclusions: Despite higher complication rate, mesh repair is superior to suture repair due to lower recurrence rate. Suture repair still has a place under certain circumstances, also it is simple less costly and has insignificant infection rate.
Taxonomic Study on the Feather Stars (Crinoidea: Echinodermata) from Egyptian Red Sea Coasts and Suez Canal, Egypt  [PDF]
Ahmed M. Hellal
Open Journal of Marine Science (OJMS) , 2012, DOI: 10.4236/ojms.2012.22007
Abstract: A taxonomic study on the crinoids (feather stars) collected from 34 sites from the Red Sea coasts and islands as well as the Suez Canal was done during the period from 1992 to 2003. A total of 15 species are now known from the Red Sea belonging to eleven genera under six families. Among them four species are endemic to the Red Sea and the two spe- cies, Decametra chadwicki and Lamprometra klunzingeri, are recorded from the Suez Canal for the first time. Also, the two species, Oligometra serripinna and Dorometra aegyptica, are new record from Gulf of Suez, and Decametra mollis from Gulf of Aqaba and Northern Red Sea. This study represents the first proper documentation of crinoid species in the study area. Summaries are provided of the specific habitats and geographical distribution.
Paratuberculosis Infection in Camel (Camelus dromidarius): Current and Prospective Overview  [PDF]
Ahmed M. Alluwaimi
Open Journal of Veterinary Medicine (OJVM) , 2015, DOI: 10.4236/ojvm.2015.57021
Abstract: Camel (Camelus dromidarius) is an important source of meat and milk and an iconic animal of the Saudi Arabian heritage. The accumulative evidence indicated the spread of paratuberculosis infection in the camel herds. Despite the explicit studies on the details of the disease in camels and methods of its diagnosis, paratuberculosis infection in camels suffers from wide gap of knowledge of the disease pathogenesis, camel immune responses to the infection and factors that enhance camel’s resistance to the infection. The review discusses the current available information of the disease pathobiology and the approaches employed in the diagnosis of paratuberculosis infection in camel. Effective control of the disease in camel prompts for urgent innovation of the current approaches in the diagnosis. Efficient policies and inspection tools are becoming vital to tackle the possible threats of Crohn’s disease to the public health due to the meat and milk consumption.
New Localization Technique for Mobile Wireless Sensor Networks Using Sectorized Antenna  [PDF]
Ahmed M. Khedr
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2015, DOI: 10.4236/ijcns.2015.89032
Abstract: Recently, there has been much focus on mobile sensor networks, and we have even seen the development of small-profile sensing devices that are able to control their own movement. Although it has been shown that mobility alleviates several issues relating to sensor network coverage and connectivity, many challenges remain. Among these, the need for position estimation is perhaps the most important. It is too expensive to include a GPS receiver with every sensor node. Hence, localization schemes for sensor networks typically use a small number of seed nodes that know their location and protocols whereby other sensor nodes estimate their location from the messages they receive. In this paper, we propose a new technique to localize mobile sensor nodes using sectorized antenna. We consider that both sensor nodes and seeds are mobile, and argue that mobility can be exploited to improve the accuracy and precision of localization. It is tested extensively in a simulation environment and compared with other existing methods. The results of our experiments clearly indicate that our proposed approach can achieve a high accuracy without need of high density of seeds.
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