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Depth and Structural Parameters Determination of the Sedimentary Basin in Atmur Nuqra Area, South Eastern Desert, Egypt Using Aeromagnetic Data Analysis  [PDF]
Ahmed A. Elhusseiny, Asmaa A. Azzazy
Geomaterials (GM) , 2021, DOI: 10.4236/gm.2021.112002
Abstract: The study area is located at the south of the eastern desert of Egypt between latitudes 24°N to 25°N and longitudes 33°E to 33°50'E covering an area of about 9407 km2. The study area is mainly covered with sediments whose age extends from the upper Cretaceous to the Quaternary, in addition to the presence of some basement rocks such as younger granites, metasediments and metagabbro. The research aims essentially to determine the thickness of the sedimentary basin by determining the depth to the top of basement and delineating the subsurface geological structures which affected this sedimentary basin. The Euler depth map exhibited that the north parts of the area have shallow depth values from 1000 m to 2000 m. The southern parts also show a shallow to moderate depths ranging from 1000 m to 2400 m. The deepest parts are located at the middle and at the western parts and are ranging in value from 3000 m to more than 4000 m. The horizontal derivative and tilt derivative techniques proved that the most effective trends all over the study area are NW-SE and NE-SW directions as mentioned in geologic lineaments map. The basement tectonic map shows clearly all the faults affected the area. It shows that there are many high blocks trending mainly in NW-SE and NE-SW directions. All high blocks surround a large sedimentary basin reaches depth of about more than 4000 m. All the results produced from 2D-modeling illustrate that the sedimentary basinal area (G2) is the deeper basin all over the area and it is controlled by some faults and fractures. 3D inversion was used and resulted in that the area of study have many high blocks at shallow to moderate depths which surrounding a large sedimentary basinal area with very deep depth values. All the techniques which applied in this research led to that the largest sedimentary basin is located at the center of the study area with NW-SE trend and depth value of about 4000 m.
Integrated Structure and Mineralization Study Using Aero-Magnetic, Aero-Spectrometric and Remote Sensing Data at Esh El-Mallaha Area, Eastern Desert, Egypt  [PDF]
Ahmed A. Elhusseiny
Geomaterials (GM) , 2023, DOI: 10.4236/gm.2023.131001
Abstract: The main scope of this research is to detect geologic structure trends affecting the study area, determine uranium anomalous areas and define alteration zones. Airborne magnetic data were used to detect the geologic structure trends affecting the study area through applying edge detectors such as total horizontal derivative, analytic signal and tilt derivative. The radio-spectrometry data and Landsat image data were used in determining the uranium anomalous areas and alteration zones. The integration between geology, magnetic and Landsat image was applied through constructing lineaments density map for the three data sets resulting in the leading of NW-SE trend all over the area. This integration makes clear that the basement (Red Sea hills), Esh El-mallaha range and G. Zeit are limiting two large basins (West Mallaha and Zeit). In addition, the main areas of uranium enrichment (Duwi formation at Esh El-Mallaha range) are found to be well related to alteration zones.
Determination of Curie Point Depth and Heat Flow Using Airborne Magnetic Data over the Kom-Ombo and Nuqra Basins, Southern Eastern Desert, Egypt  [PDF]
Ahmed Tarshan, Asmaa A. Azzazy, Ali M. Mostafa, Ahmed A. Elhusseiny
Geomaterials (GM) , 2023, DOI: 10.4236/gm.2023.134007
Abstract: The Kom-Ombo and Nuqra basins in southern Egypt have recently been discovered as potential hydrocarbon basins. The lack of information about the geothermal gradient and heat flow in the study area gives importance to studying the heat flow and the geothermal gradient. Several studies were carried out to investigate the geothermal analyses of the northwestern desert, as well as the west and east of the Nile River, using density, compressive wave velocity, and bottom hole temperature (BHT) measured from deep oil wells. This research relies on spectral analysis of airborne magnetic survey data in the Kom-Ombo and Nuqra basins in order to estimate the geothermal gradient based on calculating the depth to the bottom of the magnetic source that caused the occurrence of these magnetic deviations. This depth is equal to the CPD, at which the material loses its magnetic polarisation. This method is fast and gives satisfactory results. Usually, it can be applied as a reconnaissance technique for geothermal exploration targets due to the abundance of magnetic data. The depth of the top (Zt) and centroid (Z0) of the magnetic source bodies was calculated for the 32 windows representing the study area using spectral analysis of airborne magnetic data. The curie-isotherm depth, geothermal gradient, and heat flow maps were constructed for the study area. The results showed that the CPD in the study area ranges from 13 km to 20 km. The heat flow map values range from 69 to 109 mW/m2, with an average of about 80 mW/m2. The calculated heat flow values in the assigned areas (A, B, C, and D) of the study area are considered to have high heat flow values, reaching 109 mW/m2. On the other hand, the heat flow values in the other parts range from 70 to 85 mW/m2. Since heat flow plays an essential role in the maturation of organic matter, it is recommended that hydrocarbon accumulations be located in places with high heat flow values, while deep drilling of hydrocarbon wells is recommended in places with low to moderate heat flow values.
Imaging Pitfalls of the Acutely Traumatized Pediatric Elbow
Karim Elhusseiny,Tamer Ahmed El-Sobky
- , 2018, DOI: 10.5001/omj.2018.82
Abstract: A four-year-old otherwise healthy girl presented to our outpatient clinic complaining of left elbow pain and swelling. The child’s parents reported an indoor trauma the previous day. On clinical examination, the left elbow and forearm exhibited diffuse swelling. The gentle passive range of elbow and forearm motion was normal and mostly pain-free. Nevertheless, the radial head was stable but a palpable click was noted. The neurovascular examination was normal. The patient received radiographs of the traumatized left and normal right elbow [Figures 1 and and2].2]. Radiographs of her left forearm were unremarkable
Antioxidant Activity of New Aramide Nanoparticles Containing Redox-Active N-phthaloyl Valine Moieties in the Hepatic Cytochrome P450 System in Male Rats
Hammed H. A. M. Hassan,Sabah G. El-Banna,Amel F. Elhusseiny,El-Sayed M. E. Mansour
Molecules , 2012, DOI: 10.3390/molecules17078255
Abstract: We report the synthesis of aramide nanoparticles containing a chiral N-phthaloyl valine moiety and their antioxidant activities on hepatic contents of cytochrome P450, amidopyrene N-demethylase, aniline-4-hyroxylase and induced the hepatic content of cytochrome b5 and nicotinamide adenine dinucleotide phosphate (NADPH) cytochrome C-reductase. Polymers were obtained as well-separated spherical nanoparticles while highly aggregated particles via H-bonding organization of the aramide-containing pyridine led to a thin layer formation. The effects of the nanoparticles and CCl4 on enzyme activities and thiobarbituric acid reactive substances (TBARS) levels of male rat liver were studied. Pretreatments of rats with the polyamides prior to the administration of CCl4 decreased the hepatic content of the tested enzymes. Doses reduced the toxic effects exerted by (？CCl3) upon the liver through inhibition of the cytochrome P450 system. Inhibition of such metabolizing enzymes could reduce the carcinogenic effects of chemical carcinogens.
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.
An Overview of Conventional and Non-Conventional Water Resources in Arid Region: Assessment and Constrains of the United Arab Emirates (UAE)  [PDF]
Ahmed A. Murad
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.22020
Abstract: The aridity, population growth, agriculture and industrial activities threaten the water resources in the United Arab Emirates (UAE). In UAE, groundwater quantity is reduced and its quality is also deteriorated due to the scanty of rainfall and over pumping for different uses. The deficit of groundwater is met by desalinated water and reused of treated wastewater. Agricultural activities have negative impacts on water resources and this causes reduction of groundwater quality as the agriculture the main land use in the UAE and it accounts for more than 70% of groundwater use. The treated wastewater is an alternative source for agricultural activities. To improve the current water situation, a national water resources strategy has been prepared and imple-mented to assist in achieve this target and maintain the country’s water security. This paper intends to give an overview of water resources in the UAE with emphasis on challenges facing the management of these resources.
New Technique of Clipless Laparoscopic Cholecystectomy  [PDF]
Ahmed A. ElGeidie
Surgical Science (SS) , 2012, DOI: 10.4236/ss.2012.36061
Abstract: Background: In laparoscopic cholecystectomy (LC), application of clips is the standard method for controlling the cystic duct and artery. However, this is not without problems. We propose a modified technique for management of cystic duct and artery in LC. Methods: Since 2007, 328 patients presented with symptomatic gallstones were included. In those patients, the cystic artery was divided by monopolar cautery and the cystic duct was ligated intracorporeally using nonabsorbable suture. Results: Three patients (0.9%) have bleeding from cauterized cystic artery; bleeding was controlled by diathermy in two of them and application of metal clip was necessary in the remaining patient. Cystic duct leak was detected in only one patient (0.3%), and it was managed by percutaneous drainage. At follow up we did not encounter abnormalities suggestive of bile duct stricture. Conclusion: The proposed modification of LC is feasible, practical, safe and economic as well. It is associated with reduced risk of postoperative morbidity.
Performance Enhancement of SOVA Based Decoder in SCCC and PCCC Schemes  [PDF]
Ahmed A. Hamad
Wireless Engineering and Technology (WET) , 2013, DOI: 10.4236/wet.2013.41006
Abstract:

This study proposes a simple scaling factor approach to improve the performance of parallel-concatenated convolutional code (PCCC) and serial concatenated convolutional code (SCCC) systems based on suboptimal soft-input soft-output (SISO) decoders. Fixed and adaptive scaling factors were estimated to mitigate both the optimistic nature of a posteriori information and the correlation between intrinsic and extrinsic information produced by soft-output Viterbi (SOVA) decoders. The scaling factors could be computed off-line to reduce processing time and implementation complexity. The simulation results show a significant improvement in terms of bit-error rate (BER) over additive white Gaussian noise and Rayleigh fading channel. The convergence properties of the suggested iterative scheme are assessed using the extrinsic information transfer (EXIT) chart analysis technique.

 

Estimation of Two-Dimensional Correction Factors for Min-Sum Decoding of Regular LDPC Code  [PDF]
Ahmed A. Hamad
Wireless Engineering and Technology (WET) , 2013, DOI: 10.4236/wet.2013.44027
Abstract:

In this paper, two-dimensional (2-D) correction scheme is proposed to improve the performance of conventional Min-Sum (MS) decoding of regular low density parity check codes. The adopted algorithm to obtain the correction factors is simply based on estimating the mean square difference (MSD) between the transmitted codeword and the posteriori information of both bit and check node that produced at the MS decoder. Semi-practical tests using software-defined radio (SDR) and specific code simulations show that the proposed quasi-optimal algorithm provides a comparable error performance as Sum-Product (SP) decoding while requiring less complexity.

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