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Yehia</title> <meta name="description" content="Search results for: Soad Ali Yehia"> <meta name="keywords" content="Soad Ali Yehia"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler 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id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Soad Ali Yehia"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 26</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Soad Ali Yehia</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">26</span> Fexofenadine Hydrochloride Orodispersisble Tablets: Formulation and in vitro/in vivo Evaluation in Healthy Human Volunteers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Soad%20Ali%20Yehia">Soad Ali Yehia</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Shafik%20El-Ridi"> Mohamed Shafik El-Ridi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mina%20Ibrahim%20Tadros"> Mina Ibrahim Tadros</a>, <a href="https://publications.waset.org/abstracts/search?q=Nolwa%20Gamal%20El-Sherif"> Nolwa Gamal El-Sherif</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fexofenadine hydrochloride (FXD) is a slightly soluble, bitter-tasting, drug having an oral bioavailability of 35%. The maximum plasma concentration is reached 2.6 hours (Tmax) post-dose. The current work aimed to develop taste-masked FXD orodispersible tablets (ODTs) to increase extent of drug absorption and reduce Tmax. Taste masking was achieved via solid dispersion (SD) with chitosan (CS) or sodium alginate (ALG). FT-IR, DSC and XRD were performed to identify physicochemical interactions and FXD crystallinity. Taste-masked FXD-ODTs were developed via addition of superdisintegrants (crosscarmelose sodium or sodium starch glycolate, 5% and 10%, w/w) or sublimable agents (camphor, menthol or thymol; 10% and 20%, w/w) to FXD-SDs. ODTs were evaluated for weight variation, drug-content, friability, wetting time, disintegration time and drug release. Camphor-based (20%, w/w) FXD-ODT (F12) was optimized (F23) by incorporation of a more hydrophilic lubricant, sodium stearyl fumarate (Pruv®). The topography of the latter formula was examined via scanning electron microscopy (SEM). The in vivo estimation of FXD pharmacokinetics, relative to Allegra® tablets, was evaluated in healthy human volunteers. Based on the gustatory sensation test in healthy volunteers, FXD:CS (1:1) and FXD:ALG (1:0.5) SDs were selected. Taste-masked FXD-ODTs had appropriate physicochemical properties and showed short wetting and disintegration times. Drug release profiles of F23 and phenylalanine-containing Allegra® ODT were similar (f2 = 96) showing a complete release in two minutes. SEM micrographs revealed pores following camphor sublimation. Compared to Allegra® tablets, pharmacokinetic studies in healthy volunteers proved F23 ability to increase extent of FXD absorption (14%) and reduce Tmax to 1.83 h. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fexofenadine%20hydrochloride" title="fexofenadine hydrochloride">fexofenadine hydrochloride</a>, <a href="https://publications.waset.org/abstracts/search?q=taste%20masking" title=" taste masking"> taste masking</a>, <a href="https://publications.waset.org/abstracts/search?q=chitosan" title=" chitosan"> chitosan</a>, <a href="https://publications.waset.org/abstracts/search?q=orodispersible" title=" orodispersible"> orodispersible</a> </p> <a href="https://publications.waset.org/abstracts/4762/fexofenadine-hydrochloride-orodispersisble-tablets-formulation-and-in-vitroin-vivo-evaluation-in-healthy-human-volunteers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4762.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">343</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25</span> Low Enrollment in Civil Engineering Departments: Challenges and Opportunities</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alaa%20Yehia">Alaa Yehia</a>, <a href="https://publications.waset.org/abstracts/search?q=Ayatollah%20Yehia"> Ayatollah Yehia</a>, <a href="https://publications.waset.org/abstracts/search?q=Sherif%20Yehia"> Sherif Yehia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> There is a recurring issue of low enrollments across many civil engineering departments in postsecondary institutions. While there have been moments where enrollments begin to increase, civil engineering departments find themselves facing low enrollments at around 60% over the last five years across the Middle East. There are many reasons that could be attributed to this decline, such as low entry-level salaries, over-saturation of civil engineering graduates in the job market, and a lack of construction projects due to the impending or current recession. However, this recurring problem alludes to an intrinsic issue of the curriculum. The societal shift to the usage of high technology such as machine learning (ML) and artificial intelligence (AI) demands individuals who are proficient at utilizing it. Therefore, existing curriculums must adapt to this change in order to provide an education that is suitable for potential and current students. In this paper, In order to provide potential solutions for this issue, the analysis considers two possible implementations of high technology into the civil engineering curriculum. The first approach is to implement a course that introduces applications of high technology in Civil Engineering contexts. While the other approach is to intertwine applications of high technology throughout the degree. Both approaches, however, should meet requirements of accreditation agencies. In addition to the proposed improvement in civil engineering curriculum, a different pedagogical practice must be adapted as well. The passive learning approach might not be appropriate for Gen Z students; current students, now more than ever, need to be introduced to engineering topics and practice following different learning methods to ensure they will have the necessary skills for the job market. Different learning methods that incorporate high technology applications, like AI, must be integrated throughout the curriculum to make the civil engineering degree more attractive to prospective students. Moreover, the paper provides insight on the importance and approach of adapting the Civil Engineering curriculum to address the current low enrollment crisis that civil engineering departments globally, but specifically in the Middle East, are facing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=artificial%20intelligence%20%28AI%29" title="artificial intelligence (AI)">artificial intelligence (AI)</a>, <a href="https://publications.waset.org/abstracts/search?q=civil%20engineering%20curriculum" title=" civil engineering curriculum"> civil engineering curriculum</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20technology" title=" high technology"> high technology</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20enrollment" title=" low enrollment"> low enrollment</a>, <a href="https://publications.waset.org/abstracts/search?q=pedagogy" title=" pedagogy"> pedagogy</a> </p> <a href="https://publications.waset.org/abstracts/147851/low-enrollment-in-civil-engineering-departments-challenges-and-opportunities" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/147851.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">166</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">24</span> Societal Acceptance of Trombe Wall in Buildings in Mediterranean Region: A Case Cyprus</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Soad%20Abokhamis%20Mousavi">Soad Abokhamis Mousavi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Trombe wall is an ancient technique that continues to serve as an effective feature of a passive solar system. However, in practice, architects and their clients are not opting for the Trombe wall because of the view of the Trombe wall on the facades of the buildings. Therefore, this study has two main goals, and one of the goals is to find out why the Trombe wall is not considered in the buildings in the Mediterranean region. And the second goal is to find a solution to facilitate the societal acceptance of the Trombe walls in buildings. To cover the goals, the present work attempts to develop and design a different Trombe Wall with different Materials and views in the facades of the buildings. A qualitative data method was used in this article. The qualitative method was developed based on observation and questionnaires with different clients and expert architects in the selected region. Results indicate that the view of the Trombe wall in the facade of buildings can be used with different designs in order to not affect the beauty of the buildings. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=trombe%20wall" title="trombe wall">trombe wall</a>, <a href="https://publications.waset.org/abstracts/search?q=societal%20acceptance" title=" societal acceptance"> societal acceptance</a>, <a href="https://publications.waset.org/abstracts/search?q=building" title=" building"> building</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20efficacy" title=" energy efficacy"> energy efficacy</a> </p> <a href="https://publications.waset.org/abstracts/160411/societal-acceptance-of-trombe-wall-in-buildings-in-mediterranean-region-a-case-cyprus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/160411.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">81</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">23</span> FPGA Implementation of RSA Encryption Algorithm for E-Passport Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khaled%20Shehata">Khaled Shehata</a>, <a href="https://publications.waset.org/abstracts/search?q=Hanady%20Hussien"> Hanady Hussien</a>, <a href="https://publications.waset.org/abstracts/search?q=Sara%20Yehia"> Sara Yehia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Securing the data stored on E-passport is a very important issue. RSA encryption algorithm is suitable for such application with low data size. In this paper the design and implementation of 1024 bit-key RSA encryption and decryption module on an FPGA is presented. The module is verified through comparing the result with that obtained from MATLAB tools. The design runs at a frequency of 36.3 MHz on Virtex-5 Xilinx FPGA. The key size is designed to be 1024-bit to achieve high security for the passport information. The whole design is achieved through VHDL design entry which makes it a portable design and can be directed to any hardware platform. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=RSA" title="RSA">RSA</a>, <a href="https://publications.waset.org/abstracts/search?q=VHDL" title=" VHDL"> VHDL</a>, <a href="https://publications.waset.org/abstracts/search?q=FPGA" title=" FPGA"> FPGA</a>, <a href="https://publications.waset.org/abstracts/search?q=modular%20multiplication" title=" modular multiplication"> modular multiplication</a>, <a href="https://publications.waset.org/abstracts/search?q=modular%20exponential" title=" modular exponential"> modular exponential</a> </p> <a href="https://publications.waset.org/abstracts/4249/fpga-implementation-of-rsa-encryption-algorithm-for-e-passport-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4249.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">389</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">22</span> The Effect of Arabic Gum on Polyethersulfone Membranes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Manawi">Yehia Manawi</a>, <a href="https://publications.waset.org/abstracts/search?q=Viktor%20Kochkodan"> Viktor Kochkodan</a>, <a href="https://publications.waset.org/abstracts/search?q=Muataz%20Hussien"> Muataz Hussien</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the effect of adding Arabic Gum (AG) to the dope solutions of polyethersulfone (PES) was studied. The aim of adding AG is to enhance the properties of ultrafiltration membranes such as hydrophilicity, porosity and selectivity. several AG loading (0.1-3.0 wt.%) in PES/ N-Methyl-2-pyrrolidone (NMP) casting solutions were prepared to fabricate PES membranes using phase inversion technique. The surface morphology, hydrophilicity and selectivity of the cast PES/AG membranes were analyzed using scanning electron microscopy and contact angle measurements. The selectivity of the fabricated membranes was also tested by filtration of oil solutions (1 ppm) and found to show quite high removal efficiency. The effect of adding AG to PES membranes was found to increase the permeate flux and porosity as well as reducing surface roughness and the contact angle of the membranes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antifouling" title="antifouling">antifouling</a>, <a href="https://publications.waset.org/abstracts/search?q=Arabic%20gum" title=" Arabic gum"> Arabic gum</a>, <a href="https://publications.waset.org/abstracts/search?q=polyethersulfone%20membrane" title=" polyethersulfone membrane"> polyethersulfone membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrafiltration" title=" ultrafiltration"> ultrafiltration</a> </p> <a href="https://publications.waset.org/abstracts/69493/the-effect-of-arabic-gum-on-polyethersulfone-membranes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/69493.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">285</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">21</span> The Use of Arabic Gum Mixed with Carbon Nanotubes Functionalized with Dodecylamine to Fabricate Superior Ultrafiltration Membranes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Manawi">Yehia Manawi</a>, <a href="https://publications.waset.org/abstracts/search?q=Viktor%20Kochkodan"> Viktor Kochkodan</a>, <a href="https://publications.waset.org/abstracts/search?q=Muataz%20Hussien"> Muataz Hussien</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the effect of adding Arabic Gum (AG) and carbon nanotubes functionalized with dodecylamine (CNT-DDA) to the casting solutions of polysulfone (PS) was investigated. The aim of adding AG and CNT-DDA was to enhance the properties of ultrafiltration membranes such as hydrophilicity, porosity and selectivity. Different CNT-DDA loadings (0.1-3.0 wt.%) in 2 wt.% AG were added to PS/dimethylacetamide (DMAc) casting solutions to prepare PS membranes using phase inversion technique. The surface morphology, hydrophilicity and selectivity of the cast PS/AG/CNT-DDA membranes were analyzed using scanning electron microscopy and contact angle measurements. The selectivity of the fabricated membranes was also tested by filtration of BSA solutions (1 ppm) and found to show quite high removal efficiency. The effect of adding AG and CNT-DDA to PS membranes was found to increase the hydrophilicity, porosity and hence the permeate flux of the fabricated membranes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arabic%20gum" title="Arabic gum">Arabic gum</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrophilicity" title=" hydrophilicity"> hydrophilicity</a>, <a href="https://publications.waset.org/abstracts/search?q=polysulfone%20membrane" title=" polysulfone membrane"> polysulfone membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrafiltration" title=" ultrafiltration"> ultrafiltration</a> </p> <a href="https://publications.waset.org/abstracts/69708/the-use-of-arabic-gum-mixed-with-carbon-nanotubes-functionalized-with-dodecylamine-to-fabricate-superior-ultrafiltration-membranes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/69708.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">239</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">20</span> Improvement of Performance for R. C. Beams Made from Recycled Aggregate by Using Non-Traditional Admixture</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20H.%20Yehia">A. H. Yehia</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20M.%20Rashwan"> M. M. Rashwan</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20A.%20Assaf"> K. A. Assaf</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Abd%20el%20Samee"> K. Abd el Samee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this work is to use an environmental, cheap; organic non-traditional admixture to improve the structural behavior of sustainable reinforced concrete beams contains different ratios of recycled concrete aggregate. The used admixture prepared by using wastes from vegetable oil industry. Under and over reinforced concrete beams made from natural aggregate and different ratios of recycled concrete aggregate were tested under static load until failure. Eight beams were tested to investigate the performance and mechanism effect of admixture on improving deformation characteristics, modulus of elasticity and toughness of tested beams. Test results show efficiency of organic admixture on improving flexural behavior of beams contains 20% recycled concrete aggregate more over the other ratios. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=deflection" title="deflection">deflection</a>, <a href="https://publications.waset.org/abstracts/search?q=modulus%20of%20elasticity" title=" modulus of elasticity"> modulus of elasticity</a>, <a href="https://publications.waset.org/abstracts/search?q=non-traditional%20admixture" title=" non-traditional admixture"> non-traditional admixture</a>, <a href="https://publications.waset.org/abstracts/search?q=recycled%20concrete%20aggregate" title=" recycled concrete aggregate"> recycled concrete aggregate</a>, <a href="https://publications.waset.org/abstracts/search?q=strain" title=" strain"> strain</a>, <a href="https://publications.waset.org/abstracts/search?q=toughness" title=" toughness"> toughness</a>, <a href="https://publications.waset.org/abstracts/search?q=under%20and%20over%20reinforcement" title=" under and over reinforcement"> under and over reinforcement</a> </p> <a href="https://publications.waset.org/abstracts/7134/improvement-of-performance-for-r-c-beams-made-from-recycled-aggregate-by-using-non-traditional-admixture" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7134.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">462</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19</span> Responding of Vertical Gardens and Green Facades in Urban Design to the Global Environmental Impacts and the Call for Greening in Urban Spaces</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Esraa%20Mohamed%20Ezzat%20Ramadan%20Elkhaiary">Esraa Mohamed Ezzat Ramadan Elkhaiary</a>, <a href="https://publications.waset.org/abstracts/search?q=Ayah%20Mohamed%20Ezzat%20Ramadan%20Elkhaiary"> Ayah Mohamed Ezzat Ramadan Elkhaiary</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Yehia%20Ismaiel"> Ahmed Yehia Ismaiel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vertical lawn is crucial for the development of the constructed surroundings’ sustainability. Their implementation is also ecologically and aesthetically ideal as a good enough architectural characteristic that enhancements facades. Furthermore, their exploitation ends in a power-conscious design that prevents densely populated city areas in Cairo from transforming right into a deteriorated natural environment. After collaborative studies and analysis, it concluded that installing the vertical garden will not simply enhance urban spaces and informal settlements’ homes aesthetically but also offer an excellent role version to the metropolis in how future buildings can be constructed with vertical gardens established. Most significantly, it will enhance the general public consciousness of the inexperienced functions of the vertical garden to the constructing customers and visitors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vertical%20gardens" title="vertical gardens">vertical gardens</a>, <a href="https://publications.waset.org/abstracts/search?q=green%20facades" title=" green facades"> green facades</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20rehabilitation" title=" urban rehabilitation"> urban rehabilitation</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20spaces" title=" urban spaces"> urban spaces</a> </p> <a href="https://publications.waset.org/abstracts/173737/responding-of-vertical-gardens-and-green-facades-in-urban-design-to-the-global-environmental-impacts-and-the-call-for-greening-in-urban-spaces" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/173737.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">71</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18</span> Performance Investigation of UAV Attitude Control Based on Modified PI-D and Nonlinear Dynamic Inversion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ebrahim%20Hassan%20Kapeel">Ebrahim Hassan Kapeel</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Mohsen%20Kamel"> Ahmed Mohsen Kamel</a>, <a href="https://publications.waset.org/abstracts/search?q=Hossan%20Hendy"> Hossan Hendy</a>, <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Z.%20Elhalwagy"> Yehia Z. Elhalwagy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Interest in autopilot design has been raised intensely as a result of recent advancements in Unmanned Aerial vehicles (UAVs). Due to the enormous number of applications that UAVs can achieve, the number of applied control theories used for them has increased in recent years. These small fixed-wing UAVs are suffering high non-linearity, sensitivity to disturbances, and coupling effects between their channels. In this work, the nonlinear dynamic inversion (NDI) control lawisdesigned for a nonlinear small fixed-wing UAV model. The NDI is preferable for varied operating conditions, there is no need for a scheduling controller. Moreover, it’s applicable for high angles of attack. For the designed flight controller validation, a nonlinear Modified PI-D controller is performed with our model. A comparative study between both controllers is achieved to evaluate the NDI performance. Simulation results and analysis are proposed to illustrate the effectiveness of the designed controller based on NDI. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=UAV%20dynamic%20model" title="UAV dynamic model">UAV dynamic model</a>, <a href="https://publications.waset.org/abstracts/search?q=attitude%20control" title=" attitude control"> attitude control</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20PID" title=" nonlinear PID"> nonlinear PID</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20inversion" title=" dynamic inversion"> dynamic inversion</a> </p> <a href="https://publications.waset.org/abstracts/150437/performance-investigation-of-uav-attitude-control-based-on-modified-pi-d-and-nonlinear-dynamic-inversion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150437.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">110</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">17</span> Performance Investigation of Unmanned Aerial Vehicles Attitude Control Based on Modified PI-D and Nonlinear Dynamic Inversion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ebrahim%20H.%20Kapeel">Ebrahim H. Kapeel</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20M.%20Kamel"> Ahmed M. Kamel</a>, <a href="https://publications.waset.org/abstracts/search?q=Hossam%20Hendy"> Hossam Hendy</a>, <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Z.%20Elhalwagy"> Yehia Z. Elhalwagy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Interest in autopilot design has been raised intensely as a result of recent advancements in Unmanned Aerial vehicles (UAVs). Due to the enormous number of applications that UAVs can achieve, the number of applied control theories used for them has increased in recent years. These small fixed-wing UAVs are suffering high non-linearity, sensitivity to disturbances, and coupling effects between their channels. In this work, the nonlinear dynamic inversion (NDI) control law is designed for a nonlinear small fixed-wing UAV model. The NDI is preferable for varied operating conditions, there is no need for a scheduling controller. Moreover, it’s applicable for high angles of attack. For the designed flight controller validation, a nonlinear Modified PI-D controller is performed with our model. A comparative study between both controllers is achieved to evaluate the NDI performance. Simulation results and analysis are proposed to illustrate the effectiveness of the designed controller based on NDI. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=attitude%20control" title="attitude control">attitude control</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20PID" title=" nonlinear PID"> nonlinear PID</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20inversion" title=" dynamic inversion"> dynamic inversion</a> </p> <a href="https://publications.waset.org/abstracts/149836/performance-investigation-of-unmanned-aerial-vehicles-attitude-control-based-on-modified-pi-d-and-nonlinear-dynamic-inversion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149836.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">110</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">16</span> Modelling and Optimization of Laser Cutting Operations </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hany%20Mohamed%20Abdu">Hany Mohamed Abdu</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Hassan%20Gadallah"> Mohamed Hassan Gadallah</a>, <a href="https://publications.waset.org/abstracts/search?q=El-Giushi%20Mokhtar"> El-Giushi Mokhtar</a>, <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Mahmoud%20Ismail"> Yehia Mahmoud Ismail </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Laser beam cutting is one nontraditional machining process. This paper optimizes the parameters of Laser beam cutting machining parameters of Stainless steel (316L) by considering the effect of input parameters viz. power, oxygen pressure, frequency and cutting speed. Statistical design of experiments are carried in three different levels and process responses such as 'Average kerf taper (Ta)' and 'Surface Roughness (Ra)' are measured accordingly. A quadratic mathematical model (RSM) for each of the responses is developed as a function of the process parameters. Responses predicted by the models (as per Taguchi’s L27 OA) are employed to search for an optimal parametric combination to achieve desired yield of the process. RSM models are developed for mean responses, S/N ratio, and standard deviation of responses. Optimization models are formulated as single objective problem subject to process constraints. Models are formulated based on Analysis of Variance (ANOVA) using MATLAB environment. Optimum solutions are compared with Taguchi Methodology results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=optimization" title="optimization">optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=laser%20cutting" title=" laser cutting"> laser cutting</a>, <a href="https://publications.waset.org/abstracts/search?q=robust%20design" title=" robust design"> robust design</a>, <a href="https://publications.waset.org/abstracts/search?q=kerf%20width" title=" kerf width"> kerf width</a>, <a href="https://publications.waset.org/abstracts/search?q=Taguchi%20method" title=" Taguchi method"> Taguchi method</a>, <a href="https://publications.waset.org/abstracts/search?q=RSM%20and%20DOE" title=" RSM and DOE"> RSM and DOE</a> </p> <a href="https://publications.waset.org/abstracts/31831/modelling-and-optimization-of-laser-cutting-operations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31831.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">619</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15</span> Small Fixed-Wing UAV Physical Based Modeling, Simulation, and Validation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ebrahim%20H.%20Kapeel">Ebrahim H. Kapeel</a>, <a href="https://publications.waset.org/abstracts/search?q=Ehab%20Safwat"> Ehab Safwat</a>, <a href="https://publications.waset.org/abstracts/search?q=Hossam%20Hendy"> Hossam Hendy</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20M.%20Kamel"> Ahmed M. Kamel</a>, <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Z.%20Elhalwagy"> Yehia Z. Elhalwagy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Motivated by the problem of the availability of high-fidelity flight simulation models for small unmanned aerial vehicles (UAVs). This paper focuses on the geometric-mass inertia modeling and the actuation system modeling for the small fixed-wing UAVs. The UAV geometric parameters for the body, wing, horizontal and vertical tail are physically measured. Pendulum experiment with high-grade sensors and data analysis using MATLAB is used to estimate the airplane moment of inertia (MOI) model. Finally, UAV’s actuation system is modeled by estimating each servo transfer function by using the system identification, which uses experimental measurement for input and output angles through using field-programmable gate array (FPGA). Experimental results for the designed models are given to illustrate the effectiveness of the methodology. It also gives a very promising result to finalize the open-loop flight simulation model through modeling the propulsion system and the aerodynamic system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=unmanned%20aerial%20vehicle" title="unmanned aerial vehicle">unmanned aerial vehicle</a>, <a href="https://publications.waset.org/abstracts/search?q=geometric-mass%20inertia%20model" title=" geometric-mass inertia model"> geometric-mass inertia model</a>, <a href="https://publications.waset.org/abstracts/search?q=system%20identification" title=" system identification"> system identification</a>, <a href="https://publications.waset.org/abstracts/search?q=Simulink" title=" Simulink"> Simulink</a> </p> <a href="https://publications.waset.org/abstracts/142165/small-fixed-wing-uav-physical-based-modeling-simulation-and-validation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142165.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">179</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">14</span> Antifungal Protein ~35kDa Produced by Bacillus cereus Inhibits the Growth of Some Molds and Yeasts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saleh%20H.%20Salmen">Saleh H. Salmen</a>, <a href="https://publications.waset.org/abstracts/search?q=Sulaiman%20Ali%20Alharbi"> Sulaiman Ali Alharbi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hany%20M.%20Yehia"> Hany M. Yehia</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20A.%20Khiyami"> Mohammad A. Khiyami</a>, <a href="https://publications.waset.org/abstracts/search?q=Milton%20Wainwright"> Milton Wainwright</a>, <a href="https://publications.waset.org/abstracts/search?q=Naiyf%20S.%20Alharbi"> Naiyf S. Alharbi</a>, <a href="https://publications.waset.org/abstracts/search?q=Arunachalam%20Chinnathambi"> Arunachalam Chinnathambi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An antifungal protein synthesized by Bacillus cereus has been partially purified by the use of ammonium sulfate precipitation and Sephadex-G-200 column chromatography. The protein was produced from Bacillus cereus grown in potato Dextrose Broth Medium (PDB) at 30 ºC for 3 days at 100 rpm. The protein showed antagonistic effect against some fungi and yeasts. Crude extract from medium and semi-purified protein were tested in vitro against both fungi and yeasts using the disc diffusion method in order to detect the inhibitory effect of the protein. Zones of inhibition of the following diameter were found (mm) were Alternaria alternate (28), Rhodotorula glutinis (20), Fusarium sp. (16), Rhizopus sp. (15), Penicillium digitatum (13), Mucor sp. (13) and Aspergillus niger (10). The isolated protein was found to have a molecular weight of ~35kDa by sodium deodecyl sulfate-poly acrylamide gel electrophoresis. The data showed that the protein of Bacillus cereus has antifungal activity, a fact which points to the possibility of using it as a bio-control agent against some fungi, findings which emphasize the potential role of B. cereus as an important bio-control agent. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bacillus%20cereus" title="bacillus cereus">bacillus cereus</a>, <a href="https://publications.waset.org/abstracts/search?q=~35kDa%20protein" title=" ~35kDa protein"> ~35kDa protein</a>, <a href="https://publications.waset.org/abstracts/search?q=molds" title=" molds"> molds</a>, <a href="https://publications.waset.org/abstracts/search?q=yeasts" title=" yeasts"> yeasts</a> </p> <a href="https://publications.waset.org/abstracts/3422/antifungal-protein-35kda-produced-by-bacillus-cereus-inhibits-the-growth-of-some-molds-and-yeasts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3422.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">291</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13</span> Desalination via Electrodialysis: A Newly Designed Fixed Bed Reactor Powered by Renewable Energy Source </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hend%20Mesbah">Hend Mesbah</a>, <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Youssef"> Yehia Youssef</a>, <a href="https://publications.waset.org/abstracts/search?q=Ibrahim%20%20Hassan"> Ibrahim Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=Shaaban%20Nosier"> Shaaban Nosier</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20El-Shazly"> Ahmed El-Shazly</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Helal"> Ahmed Helal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The problem of drinking water shortage is becoming more crucial nowadays as a result of the increased demand due to the population growth and the rise in the standard living. In recent years, desalination using electrodialysis powered by solar energy (PV-ED) is being widely used to help provide treated water and reduce the scarcity in water supply. In the present study, a water desalination laboratory scale ED cell with a fixed bed circulation system was designed, developed, and tested. The effect of three parameters (namely, cell voltage , flowrate, and salt concentration) on the removal percentage of salt ions was studied. The cell voltage was adjusted at 3 , 4 and 6 V. A flow rate of 5, 10, and 20 ml/s and an initial salt concentration of 2000, 5000, and 7000 ppm were investigated. The maximum salt percentage removal obtained was 52.5% at the lowest initial concentration (2000 ppm) and at the highest cell voltage (6 V). There was no significant effect of the flow rate on the removal percentage. A model of PV module has also been developed to calculate the dimensions of a solar cell based on the amount of energy consumed and it was calculated from the Overall ED cell voltage. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=desalination" title="desalination">desalination</a>, <a href="https://publications.waset.org/abstracts/search?q=electrodialysis" title=" electrodialysis"> electrodialysis</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20desalination" title=" solar desalination"> solar desalination</a>, <a href="https://publications.waset.org/abstracts/search?q=photovoltaic%20electrodialysis" title=" photovoltaic electrodialysis"> photovoltaic electrodialysis</a> </p> <a href="https://publications.waset.org/abstracts/123726/desalination-via-electrodialysis-a-newly-designed-fixed-bed-reactor-powered-by-renewable-energy-source" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/123726.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">146</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">12</span> Cantilever Shoring Piles with Prestressing Strands: An Experimental Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hani%20Mekdash">Hani Mekdash</a>, <a href="https://publications.waset.org/abstracts/search?q=Lina%20Jaber"> Lina Jaber</a>, <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Temsah"> Yehia Temsah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Underground space is becoming a necessity nowadays, especially in highly congested urban areas. Retaining underground excavations using shoring systems is essential in order to protect adjoining structures from potential damage or collapse. Reinforced Concrete Piles (RCP) supported by multiple rows of tie-back anchors are commonly used type of shoring systems in deep excavations. However, executing anchors can sometimes be challenging because they might illegally trespass neighboring properties or get obstructed by infrastructure and other underground facilities. A technique is proposed in this paper, and it involves the addition of eccentric high-strength steel strands to the RCP section through ducts without providing the pile with lateral supports. The strands are then vertically stressed externally on the pile cap using a hydraulic jack, creating a compressive strengthening force in the concrete section. An experimental study about the behavior of the shoring wall by pre-stressed piles is presented during the execution of an open excavation in an urban area (Beirut city) followed by numerical analysis using finite element software. Based on the experimental results, this technique is proven to be cost-effective and provides flexible and sustainable construction of shoring works. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=deep%20excavation" title="deep excavation">deep excavation</a>, <a href="https://publications.waset.org/abstracts/search?q=prestressing" title=" prestressing"> prestressing</a>, <a href="https://publications.waset.org/abstracts/search?q=pre-stressed%20piles" title=" pre-stressed piles"> pre-stressed piles</a>, <a href="https://publications.waset.org/abstracts/search?q=shoring%20system" title=" shoring system"> shoring system</a> </p> <a href="https://publications.waset.org/abstracts/134287/cantilever-shoring-piles-with-prestressing-strands-an-experimental-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134287.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">117</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">11</span> Impact of Welding Distortion on the Design of Fabricated T-Girders Using Finite Element Modeling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Hammad"> Ahmed Hammad</a>, <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Abdel-Nasser"> Yehia Abdel-Nasser</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Shamma"> Mohamed Shamma</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main configuration of ship construction consists of standard and fabricated stiffening members which are commonly used in shipbuilding such as fabricated T-sections. During the welding process, the non-uniform heating and rapid cooling lead to the inevitable presence of out-of-plane distortion and welding induced residual stresses. Because of these imperfections, the fabricated structural members may not attain their design load to be carried. The removal of these imperfections will require extra man-hours. In the present work, controlling these imperfections has been investigated at both design and fabrication stages. A typical fabricated T-girder is selected to investigate the problem of these imperfections using double-side welding. A numerical simulation based on finite element (FE) modeling has been used to investigate the effect of different parameters of the selected fabricated T-girder such as geometrical properties and welding sequences on the magnitude of welding imperfections. FE results were compared with the results of experimental model of a double-side fillet weld. The present work concludes that: Firstly, in the design stage, the optimum geometry of the fabricated T- girder is determined based on minimum steel weight and out- of- plane distortion. Secondly, in the fabrication stage, the best welding sequence is determined on the basis of minimum welding out- of- plane distortion. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fabricated%20T-girder" title="fabricated T-girder">fabricated T-girder</a>, <a href="https://publications.waset.org/abstracts/search?q=FEM" title=" FEM"> FEM</a>, <a href="https://publications.waset.org/abstracts/search?q=out-of-plane%20distortion" title=" out-of-plane distortion"> out-of-plane distortion</a>, <a href="https://publications.waset.org/abstracts/search?q=section%20modulus" title=" section modulus"> section modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=welding%20residual%20stresses" title=" welding residual stresses"> welding residual stresses</a> </p> <a href="https://publications.waset.org/abstracts/114303/impact-of-welding-distortion-on-the-design-of-fabricated-t-girders-using-finite-element-modeling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/114303.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">122</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">10</span> Prophylactic and Curative Effect of Selenium on Infertility Induced by Formaldehyde Using Male Albino Mice</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Suhera%20M.%20Aburawi">Suhera M. Aburawi</a>, <a href="https://publications.waset.org/abstracts/search?q=Habiba%20A.%20El%20Jaafari"> Habiba A. El Jaafari</a>, <a href="https://publications.waset.org/abstracts/search?q=Soad%20A.%20Treesh"> Soad A. Treesh</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdulssalam%20M.%20Abu-Aisha"> Abdulssalam M. Abu-Aisha</a>, <a href="https://publications.waset.org/abstracts/search?q=Faisal%20S.%20Alwaer"> Faisal S. Alwaer</a>, <a href="https://publications.waset.org/abstracts/search?q=Reda%20A.%20Eltubuly"> Reda A. Eltubuly</a>, <a href="https://publications.waset.org/abstracts/search?q=Medeha%20Elghedamsi"> Medeha Elghedamsi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Infertility is a source of psychological, and sometimes social, stress on parents who desire to have children. Formaldehyde is used chiefly as disinfectant, preservative and in the chemical synthesis. The medical uses of formaldehyde are limited, but focused especially on laboratory use. Selenium is an essential trace mineral element for human; it is essential for sperm function and male fertility. Selenium deficiency has been linked to reproductive problems in animals. Objectives: To investigate the prophylactic and curative effect of selenium on male infertility induced by formaldehyde using male albino mice. Method: Forty male albino mice were used, weight 25-30 gm. Five groups of male mice (n=8) were used. Group 1 was daily administered water for injection (5ml/kg) for five days, group 2 was daily administered selenium (100 μg/kg) for five days, group 3 was daily administered formaldehyde (30mg/kg) for five days, group 4 (prophylaxis) was daily administered a combination of formaldehyde and selenium for five days, while group 5 (curative) was daily administered formaldehyde for five days followed by daily administration of selenium for the next five days. Intraperitoneal administration was adopted. At the end of the administration, seminal fluid was collected from vas deferens. Sperm count, morphology and motility were scored; histopathological screening of genital system was carried out. SPSS was applied for comparing groups. Results and conclusion: It was found that formaldehyde toxicity did not change the sperm count and percentage of motile sperm; unhealthy sperm was increased, while healthy sperm was decreased. Formaldehyde produces degeneration/damage to the male mice genital system. Selenium alone produce an increase in sperm count, volume of seminal fluid and the percentage of motile sperm. Selenium has prophylactic and curative effects against formaldehyde-induce genital system toxicity. Future work is recommended to find out if selenium protective effect is through antioxidant or other mechanisms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=infertility" title="infertility">infertility</a>, <a href="https://publications.waset.org/abstracts/search?q=formaldehyde" title=" formaldehyde"> formaldehyde</a>, <a href="https://publications.waset.org/abstracts/search?q=selenium" title=" selenium"> selenium</a>, <a href="https://publications.waset.org/abstracts/search?q=male%20mice" title=" male mice"> male mice</a> </p> <a href="https://publications.waset.org/abstracts/10382/prophylactic-and-curative-effect-of-selenium-on-infertility-induced-by-formaldehyde-using-male-albino-mice" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10382.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">420</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">9</span> Early versus Late Percutaneous Tracheostomy in Critically Ill Adult Mechanically Ventilated Patients</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kamel%20Abd%20Elaziz%20Mohamed">Kamel Abd Elaziz Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Yehia%20Mousa"> Ahmed Yehia Mousa</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Samir%20ElSawy"> Ahmed Samir ElSawy</a>, <a href="https://publications.waset.org/abstracts/search?q=Adel%20Mohamed%20Saleem"> Adel Mohamed Saleem </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Critically ill patients frequently require tracheostomy to simplify long term air way management. While tracheostomy indications have remained unchanged, the timing of elective tracheostomy for the ventilated patient has been questioned. Aim of the work: This study was performed to compare the differences between early and late percutaneous dilatational tracheostomy (PDT) regarding, mechanical ventilation duration (MVD), length of ICU stay, length of hospital stay, incidence of ventilator associated pneumonia and hospital outcome. Patients and methods: Forty patients who met the inclusion criteria were randomly divided into early PDT who had the tracheostomy within the first 10 days of mechanical ventilation (MV) and the late PDT who had the tracheostomy after 10 days of MV. On admission, demographic data and Acute Physiology and Chronic ill Health II and GCS were collected. The duration of mechanical ventilation, ICU length of stay (LOS) and hospital LOS were all calculated. Results: Total of 40 patients were randomized to either early PDT (n= 20) or late PDT (n= 20). There were no significant differences between both groups regarding demographic data or the scores: APACHE II (22.75± 7 vs 24.35 ± 8) and GCS (6.10 ±2 vs 7.10 ± 2.71). An early PDT showed fewer complications vs late procedure, however it was insignificant. There were significant differences between the two groups regarding mean (MVD) which was shorter in early PDT than the late PDT group (32.2± 10.5) vs (20.6 ± 13 days; p= 0.004). Mean ICU stay was shorter in early PDT than late PDT (21 .0± 513.4) vs (40.15 ±12.7 days; p 6 0.001). Mean hospital stay was shorter in early PDT than late PDT (34.60± 18.37) vs (55.60± 25.73 days; p=0.005). Patients with early PDT suffered less sepsis and VAP than late PDT, there was no difference regarding the mortality rate between the two groups. Conclusion: Early PDT is recommended for patients who require prolonged tracheal intubation in the ICU as outcomes like the duration of mechanical ventilation length of ICU stay and hospital stay were significantly shorter in early tracheostomy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=intensive%20care%20unit" title="intensive care unit">intensive care unit</a>, <a href="https://publications.waset.org/abstracts/search?q=early%20PDT" title=" early PDT"> early PDT</a>, <a href="https://publications.waset.org/abstracts/search?q=late%20PDT" title=" late PDT"> late PDT</a>, <a href="https://publications.waset.org/abstracts/search?q=intubation" title=" intubation"> intubation</a> </p> <a href="https://publications.waset.org/abstracts/19548/early-versus-late-percutaneous-tracheostomy-in-critically-ill-adult-mechanically-ventilated-patients" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19548.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">600</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> Numerical Investigation on Anchored Sheet Pile Quay Wall with Separated Relieving Platform</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Roushdy">Mahmoud Roushdy</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20El%20Naggar"> Mohamed El Naggar</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Yehia%20Abdelaziz"> Ahmed Yehia Abdelaziz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Anchored sheet pile has been used worldwide as front quay walls for decades. With the increase in vessel drafts and weights, those sheet pile walls need to be upgraded by increasing the depth of the dredging line in front of the wall. A system has recently been used to increase the depth in front of the wall by installing a separated platform supported on a deep foundation (so called Relieving Platform) behind the sheet pile wall. The platform is structurally separated from the front wall. This paper presents a numerical investigation utilizing finite element analysis on the behavior of separated relieve platforms installed within existing anchored sheet pile quay walls. The investigation was done in two steps: a verification step followed by a parametric study. In the verification step, the numerical model was verified based on field measurements performed by others. The validated model was extended within the parametric study to a series of models with different backfill soils, separation gap width, and number of pile rows supporting the platform. The results of the numerical investigation show that using stiff clay as backfill soil (neglecting consolidation) gives better performance for the front wall and the first pile row adjacent to sandy backfills. The degree of compaction of the sandy backfill slightly increases lateral deformations but reduces bending moment acting on pile rows, while the effect is minor on the front wall. In addition, the increase in the separation gap width gradually increases bending moments on the front wall regardless of the backfill soil type, while this effect is reversed on pile rows (gradually decrease). Finally, the paper studies the possibility of reducing the number of pile rows along with the separation to take advantage of the positive separation effect on piles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anchored%20sheet%20pile" title="anchored sheet pile">anchored sheet pile</a>, <a href="https://publications.waset.org/abstracts/search?q=relieving%20platform" title=" relieving platform"> relieving platform</a>, <a href="https://publications.waset.org/abstracts/search?q=separation%20gap" title=" separation gap"> separation gap</a>, <a href="https://publications.waset.org/abstracts/search?q=upgrade%20quay%20wall" title=" upgrade quay wall"> upgrade quay wall</a> </p> <a href="https://publications.waset.org/abstracts/162037/numerical-investigation-on-anchored-sheet-pile-quay-wall-with-separated-relieving-platform" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162037.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">85</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7</span> An Investigation into the Potential of Industrial Low Grade Heat in Membrane Distillation for Freshwater Production</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Manawi">Yehia Manawi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Kayvanifard"> Ahmad Kayvanifard</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Membrane distillation is an emerging technology which has been used to produce freshwater and purify different types of aqueous mixtures. Qatar is an arid country where almost 100% of its freshwater demand is supplied through the energy-intensive thermal desalination process. The country’s need for water has reached an all-time high which stipulates finding an alternative way to augment freshwater without adding any drastic affect to the environment. The objective of this paper was to investigate the potential of using the industrial low grade waste heat to produce freshwater using membrane distillation. The main part of this work was conducting a heat audit on selected Qatari chemical industries to estimate the amounts of freshwater produced if such industrial waste heat were to be recovered. By the end of this work, the main objective was met and the heat audit conducted on the Qatari chemical industries enabled us to estimate both the amounts of waste heat which can be potentially recovered in addition to the amounts of freshwater which can be produced if such waste heat were to be recovered. By the end, the heat audit showed that around 605 Mega Watts of waste heat can be recovered from the studied Qatari chemical industries which resulted in a total daily production of 5078.7 cubic meter of freshwater. This water can be used in a wide variety of applications such as human consumption or industry. The amount of produced freshwater may look small when compared to that produced through thermal desalination plants; however, one must bear in mind that this water comes from waste and can be used to supply water for small cities or remote areas which are not connected to the water grid. The idea of producing freshwater from the two widely-available wastes (thermal rejected brine and waste heat) seems promising as less environmental and economic impacts will be associated with freshwater production which may in the near future augment the conventional way of producing freshwater currently being thermal desalination. This work has shown that low grade waste heat in the chemical industries in Qatar and perhaps the rest of the world can contribute to additional production of freshwater using membrane distillation without significantly adding to the environmental impact. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane%20distillation" title="membrane distillation">membrane distillation</a>, <a href="https://publications.waset.org/abstracts/search?q=desalination" title=" desalination"> desalination</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20recovery" title=" heat recovery"> heat recovery</a>, <a href="https://publications.waset.org/abstracts/search?q=environment" title=" environment"> environment</a> </p> <a href="https://publications.waset.org/abstracts/6188/an-investigation-into-the-potential-of-industrial-low-grade-heat-in-membrane-distillation-for-freshwater-production" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6188.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">319</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> Eggshell Waste Bioprocessing for Sustainable Acid Phosphatase Production and Minimizing Environmental Hazards</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Soad%20Abubakr%20Abdelgalil">Soad Abubakr Abdelgalil</a>, <a href="https://publications.waset.org/abstracts/search?q=Gaber%20Attia%20Abo-Zaid"> Gaber Attia Abo-Zaid</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Mohamed%20Yousri%20Kaddah"> Mohamed Mohamed Yousri Kaddah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: The Environmental Protection Agency has listed eggshell waste as the 15th most significant food industry pollution hazard. The utilization of eggshell waste as a source of renewable energy has been a hot topic in recent years. Therefore, finding a sustainable solution for the recycling and valorization of eggshell waste by investigating its potential to produce acid phosphatase (ACP) and organic acids by the newly-discovered B. sonorensis was the target of the current investigation. Results: The most potent ACP-producing B. sonorensis strain ACP2 was identified as a local bacterial strain obtained from the effluent of paper and pulp industries on basis of molecular and morphological characterization. The use of consecutive statistical experimental approaches of Plackett-Burman Design (PBD), and Orthogonal Central Composite Design (OCCD), followed by pH-uncontrolled cultivation conditions in a 7 L bench-top bioreactor, revealed an innovative medium formulation that substantially improved ACP production, reaching 216 U L⁻¹ with ACP yield coefficient Yp/x of 18.2 and a specific growth rate (µ) of 0.1 h⁻¹. The metals Ag+, Sn+, and Cr+ were the most efficiently released from eggshells during the solubilization process by B. sonorensis. The uncontrolled pH culture condition is the most suited and favored setting for improving the ACP and organic acids production simultaneously. Quantitative and qualitative analyses of produced organic acids were carried out using liquid chromatography-tandem mass spectrometry (LC-MS/MS). Lactic acid, citric acid, and hydroxybenzoic acid isomer were the most common organic acids produced throughout the cultivation process. The findings of thermogravimetric analysis (TGA), differential scan calorimeter (DSC), scanning electron microscope (SEM), energy-dispersive spectroscopy (EDS), Fourier-Transform Infrared Spectroscopy (FTIR), and X-Ray Diffraction (XRD) analysis emphasize the significant influence of organic acids and ACP activity on the solubilization of eggshells particles. Conclusions: This study emphasized robust microbial engineering approaches for the large-scale production of a newly discovered acid phosphatase accompanied by organic acids production from B. sonorensis. The biovalorization of the eggshell waste and the production of cost-effective ACP and organic acids were integrated into the current study, and this was done through the implementation of a unique and innovative medium formulation design for eggshell waste management, as well as scaling up ACP production on a bench-top scale. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chicken%20eggshells%20waste" title="chicken eggshells waste">chicken eggshells waste</a>, <a href="https://publications.waset.org/abstracts/search?q=bioremediation" title=" bioremediation"> bioremediation</a>, <a href="https://publications.waset.org/abstracts/search?q=statistical%20experimental%20design" title=" statistical experimental design"> statistical experimental design</a>, <a href="https://publications.waset.org/abstracts/search?q=batch%20fermentation" title=" batch fermentation"> batch fermentation</a> </p> <a href="https://publications.waset.org/abstracts/159622/eggshell-waste-bioprocessing-for-sustainable-acid-phosphatase-production-and-minimizing-environmental-hazards" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/159622.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">376</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> ATR-IR Study of the Mechanism of Aluminum Chloride Induced Alzheimer Disease - Curative and Protective Effect of Lepidium sativum Water Extract on Hippocampus Rats Brain Tissue</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maha%20J.%20Balgoon">Maha J. Balgoon</a>, <a href="https://publications.waset.org/abstracts/search?q=Gehan%20A.%20Raouf"> Gehan A. Raouf</a>, <a href="https://publications.waset.org/abstracts/search?q=Safaa%20Y.%20Qusti"> Safaa Y. Qusti</a>, <a href="https://publications.waset.org/abstracts/search?q=Soad%20S.%20Ali"> Soad S. Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main cause of Alzheimer disease (AD) was believed to be mainly due to the accumulation of free radicals owing to oxidative stress (OS) in brain tissue. The mechanism of the neurotoxicity of Aluminum chloride (AlCl3) induced AD in hippocampus Albino wister rat brain tissue, the curative & the protective effects of Lipidium sativum group (LS) water extract were assessed after 8 weeks by attenuated total reflection spectroscopy ATR-IR and histologically by light microscope. ATR-IR results revealed that the membrane phospholipid undergo free radical attacks, mediated by AlCl3, primary affects the polyunsaturated fatty acids indicated by the increased of the olefinic -C=CH sub-band area around 3012 cm-1 from the curve fitting analysis. The narrowing in the half band width(HBW) of the sνCH2 sub-band around 2852 cm-1 due to Al intoxication indicates the presence of trans form fatty acids rather than gauch rotomer. The degradation of hydrocarbon chain to shorter chain length, increasing in membrane fluidity, disorder and decreasing in lipid polarity in AlCl3 group were indicated by the detected changes in certain calculated area ratios compared to the control. Administration of LS was greatly improved these parameters compared to the AlCl3 group. Al influences the Aβ aggregation and plaque formation, which in turn interferes to and disrupts the membrane structure. The results also showed a marked increase in the β-parallel and antiparallel structure, that characterize the Aβ formation in Al-induced AD hippocampal brain tissue, indicated by the detected increase in both amide I sub-bands around 1674, 1692 cm-1. This drastic increase in Aβ formation was greatly reduced in the curative and protective groups compared to the AlCl3 group and approaches nearly the control values. These results were supported too by the light microscope. AlCl3 group showed significant marked degenerative changes in hippocampal neurons. Most cells appeared small, shrieked and deformed. Interestingly, the administration of LS in curative and protective groups markedly decreases the amount of degenerated cells compared to the non-treated group. Also the intensity of congo red stained cells was decreased. Hippocampal neurons looked more/or less similar to those of control. This study showed a promising therapeutic effect of Lipidium sativum group (LS) on AD rat model that seriously overcome the signs of oxidative stress on membrane lipid and restore the protein misfolding. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aluminum%20chloride" title="aluminum chloride">aluminum chloride</a>, <a href="https://publications.waset.org/abstracts/search?q=alzheimer%20disease" title=" alzheimer disease"> alzheimer disease</a>, <a href="https://publications.waset.org/abstracts/search?q=ATR-IR" title=" ATR-IR"> ATR-IR</a>, <a href="https://publications.waset.org/abstracts/search?q=Lipidium%20sativum" title=" Lipidium sativum"> Lipidium sativum</a> </p> <a href="https://publications.waset.org/abstracts/39237/atr-ir-study-of-the-mechanism-of-aluminum-chloride-induced-alzheimer-disease-curative-and-protective-effect-of-lepidium-sativum-water-extract-on-hippocampus-rats-brain-tissue" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/39237.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">366</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Correlative Study of Serum Interleukin-18 and Disease Activity, Functional Disability and Quality of Life in Rheumatoid Arthritis Patients</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hamdy%20Khamis%20Korayem">Hamdy Khamis Korayem</a>, <a href="https://publications.waset.org/abstracts/search?q=Manal%20Yehia%20Tayel"> Manal Yehia Tayel</a>, <a href="https://publications.waset.org/abstracts/search?q=Abeer%20Shawky%20El%20Hadedy"> Abeer Shawky El Hadedy</a>, <a href="https://publications.waset.org/abstracts/search?q=Emmanuel%20Kamal%20Aziz%20Saba"> Emmanuel Kamal Aziz Saba</a>, <a href="https://publications.waset.org/abstracts/search?q=Shimaa%20Badr%20Abdelnaby%20Badr"> Shimaa Badr Abdelnaby Badr</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of the current study was to demonstrate whether serum Interleukin-18 (IL-18) is increased in rheumatoid arthritis (RA) and its correlation with disease activity, functional disability and quality of life in RA patients. The study included 30 RA patients and 20 healthy normal control subjects. The RA patients were diagnosed according to the 2010 ACR/EULAR classification criteria for RA with the exclusion of those who had diabetes mellitus, endocrine disorders, associated rheumatologic diseases, viral hepatitis B or C and other diseases with increased serum IL-18 level. All patients were subjected to clinical evaluation of the musculoskeletal system. Disease activity was assessed by disease activity score 28 with 4 variables (DAS 28). Functional disability was assessed by health assessment questionnaire disability index (HAQ-DI). The quality of life was assessed by Short form-36 (SF-36) questionnaire. Radiological assessment of both hands and feet by Sharp/van der Heijde (SvH) scoring method. Laboratory parameters including erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), rheumatoid factor (RF) and anti-cyclic citrullinated peptide antibody (ACPA) were assessed in patients and serum level of IL-18 in both patients and control subjects. There was no statistically significant difference between patient and control group as regards age and sex. Among patients, 29 % were females and the age range was between 25 to 55 years. Extra-articular manifestations were presented in 56.7% of the patients. The mean of DAS 28 score was 5.73±1.46 and that of HAQ-DI was 1.22±0.72 while that of SF-36 was 40.03±13.96. The level of serum IL-18 was significantly higher in patients than in the control subjects (P= 0.030). Serum IL-18 was correlated with ACPA among the patient group. There were no statistically significant correlations between serum IL-18 and DAS28, HAQ-DI, SF-36, total SvH score and the other laboratory results. In conclusion, IL-18 is significantly higher in RA patient than in healthy control subjects and positively correlated with ACPA level. IL-18 is associated with extra-articular manifestations. However, it is not correlated with other laboratory parameters, disease activity, functional disability, quality of life nor radiological severity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=disease%20activity%20score" title="disease activity score">disease activity score</a>, <a href="https://publications.waset.org/abstracts/search?q=Interleukin-18" title=" Interleukin-18"> Interleukin-18</a>, <a href="https://publications.waset.org/abstracts/search?q=quality%20of%20life%20assessment" title=" quality of life assessment"> quality of life assessment</a>, <a href="https://publications.waset.org/abstracts/search?q=rheumatoid%20arthritis" title=" rheumatoid arthritis "> rheumatoid arthritis </a> </p> <a href="https://publications.waset.org/abstracts/46516/correlative-study-of-serum-interleukin-18-and-disease-activity-functional-disability-and-quality-of-life-in-rheumatoid-arthritis-patients" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46516.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">325</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Anthropogenic Impact on Surface and Groundwaters Quality in the Western Part of the River Nile, Elsaff Village, Giza</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Elkashouty">Mohamed Elkashouty</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Yehia"> Mohamed Yehia</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Tawfuk"> Ahmed Tawfuk</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study area is located in the southern part of Giza Governorate at both side of the Nile Valley. A combination of major and trace elements have been used to classify surface- and ground-waters in El Kurimat village, Egypt. The main purpose of the project is to investigate the surface-and ground-waters quality and hydrochemical evaluation. The situation is further complicated by contamination with lithogenic and anthropogenic (agricultural and sewage wastewaters) sources and low groundwater management strategies. The Quaternary aquifer consists of sands and gravels of Pleistocene age intercalated with clay lenses and overlain by silty clay aquitard (Holocene). The semi-pervious silty clay aquitard of the Holocene Nile sediments cover the Quaternary aquifer in most areas. The groundwater flows generally from southwest to northeast. To achieve this target, thirty five and seventy three samples were collected from surface– and ground-waters within summer and winter seasons 2009-2010). Total dissolved solids (TDS), cations, anions, NO2, NO3, PO4 , Al, Ba, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn, As, F, Sb, Se, Sn, Sr and V) were determined in water samples. Grain size analysis was achieved to eight soil samples and measured the organic matter percent in different fractions. The TDS concentration is high in Arab El Ein canal by lithogenic and anthropogenic sources. The average concentrations of TDS in the River Nile are 245 (summer) and 254 ppm (winter). NO3 content ranges from 1.7 to 12 mg/l (summer), while in winter it ranges from 0.4 to 2.4. Most of the toxic metal concentrations are below the drinking and irrigation guidelines except Mn, V, Cr, Al, and Fe, which are higher than the guidelines in some canals and drains. The TDS concentration in groundwater increases toward northeastern and northwestern part of the study area (i.e. toward limestone plateau). It is due to hydrogeological interconnection between Quaternary and Eocene aquifer (saline water), wastewater dump and recharge from wadi El Atfihi wastewater. There is a good match between the hydrogeology and the hydrogeochemistry. Total dissolved solid in groundwater increases toward southwestern part, may be due to hydrogeological interconnection between Quaternary and Eocene aquifer and leakage from agricultural waste water of El Mohut drain. Fe, Mn, Cr, Al, PO4 and NO3 concentrations are high due to anthropogenic sources, therefore they are unsuitable for drinking. The average concentration of Cr, Cu, Fe, Mn &Zn are higher in winter than those in summer due to winter drought. The organic matter content in soil are increases in the northeastern and southwestern part, with different fractions, sue to agricultural wastewaters. Reused of contaminated surface- and ground-waters samples by mixing with fresh water (By AquaChem) was estimated to increase the income per capita. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=surface%20water" title="surface water">surface water</a>, <a href="https://publications.waset.org/abstracts/search?q=groundwater" title=" groundwater"> groundwater</a>, <a href="https://publications.waset.org/abstracts/search?q=major%20ions" title=" major ions"> major ions</a>, <a href="https://publications.waset.org/abstracts/search?q=toxic%20metals" title=" toxic metals"> toxic metals</a> </p> <a href="https://publications.waset.org/abstracts/29549/anthropogenic-impact-on-surface-and-groundwaters-quality-in-the-western-part-of-the-river-nile-elsaff-village-giza" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29549.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">293</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Seawater Desalination for Production of Highly Pure Water Using a Hydrophobic PTFE Membrane and Direct Contact Membrane Distillation (DCMD)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Kayvani%20Fard">Ahmad Kayvani Fard</a>, <a href="https://publications.waset.org/abstracts/search?q=Yehia%20Manawi"> Yehia Manawi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Qatar’s primary source of fresh water is through seawater desalination. Amongst the major processes that are commercially available on the market, the most common large scale techniques are Multi-Stage Flash distillation (MSF), Multi Effect distillation (MED), and Reverse Osmosis (RO). Although commonly used, these three processes are highly expensive down to high energy input requirements and high operating costs allied with maintenance and stress induced on the systems in harsh alkaline media. Beside that cost, environmental footprint of these desalination techniques are significant; from damaging marine eco-system, to huge land use, to discharge of tons of GHG and huge carbon footprint. Other less energy consuming techniques based on membrane separation are being sought to reduce both the carbon footprint and operating costs is membrane distillation (MD). Emerged in 1960s, MD is an alternative technology for water desalination attracting more attention since 1980s. MD process involves the evaporation of a hot feed, typically below boiling point of brine at standard conditions, by creating a water vapor pressure difference across the porous, hydrophobic membrane. Main advantages of MD compared to other commercially available technologies (MSF and MED) and specially RO are reduction of membrane and module stress due to absence of trans-membrane pressure, less impact of contaminant fouling on distillate due to transfer of only water vapor, utilization of low grade or waste heat from oil and gas industries to heat up the feed up to required temperature difference across the membrane, superior water quality, and relatively lower capital and operating cost. To achieve the objective of this study, state of the art flat-sheet cross-flow DCMD bench scale unit was designed, commissioned, and tested. The objective of this study is to analyze the characteristics and morphology of the membrane suitable for DCMD through SEM imaging and contact angle measurement and to study the water quality of distillate produced by DCMD bench scale unit. Comparison with available literature data is undertaken where appropriate and laboratory data is used to compare a DCMD distillate quality with that of other desalination techniques and standards. Membrane SEM analysis showed that the PTFE membrane used for the study has contact angle of 127º with highly porous surface supported with less porous and bigger pore size PP membrane. Study on the effect of feed solution (salinity) and temperature on water quality of distillate produced from ICP and IC analysis showed that with any salinity and different feed temperature (up to 70ºC) the electric conductivity of distillate is less than 5 μS/cm with 99.99% salt rejection and proved to be feasible and effective process capable of consistently producing high quality distillate from very high feed salinity solution (i.e. 100000 mg/L TDS) even with substantial quality difference compared to other desalination methods such as RO and MSF. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane%20distillation" title="membrane distillation">membrane distillation</a>, <a href="https://publications.waset.org/abstracts/search?q=waste%20heat" title=" waste heat"> waste heat</a>, <a href="https://publications.waset.org/abstracts/search?q=seawater%20desalination" title=" seawater desalination"> seawater desalination</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane" title=" membrane"> membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=freshwater" title=" freshwater"> freshwater</a>, <a href="https://publications.waset.org/abstracts/search?q=direct%20contact%20membrane%20distillation" title=" direct contact membrane distillation"> direct contact membrane distillation</a> </p> <a href="https://publications.waset.org/abstracts/6187/seawater-desalination-for-production-of-highly-pure-water-using-a-hydrophobic-ptfe-membrane-and-direct-contact-membrane-distillation-dcmd" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6187.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">227</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Rendering Religious References in English: Naguib Mahfouz in the Arabic as a Foreign Language Classroom</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shereen%20Yehia%20El%20Ezabi">Shereen Yehia El Ezabi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The transition from the advanced to the superior level of Arabic proficiency is widely known to pose considerable challenges for English speaking students of Arabic as a Foreign Language (AFL). Apart from the increasing complexity of the grammar at this juncture, together with the sprawling vocabulary, to name but two of those challenges, there is also the somewhat less studied hurdle along the way to superior level proficiency, namely, the seeming opacity of many aspects of Arab/ic culture to such learners. This presentation tackles one specific dimension of such issues: religious references in literary texts. It illustrates how carefully constructed translation activities may be used to expand and deepen students’ understanding and use of them. This is shown to be vital for making the leap to the desired competency, given that such elements, as reflected in customs, traditions, institutions, worldviews, and formulaic expressions lie at the very core of Arabic culture and, as such, pervade all modes and levels of Arabic discourse. A short story from the collection “Stories from Our Alley”, by preeminent novelist Naguib Mahfouz is selected for use in this context, being particularly replete with such religious references, of which religious expressions will form the focus of the presentation. As a miniature literary work, it provides an organic whole, so to speak, within which to explore with the class the most precise denotation, as well as the subtlest connotation of each expression in an effort to reach the ‘best’ English rendering. The term ‘best’ refers to approximating the meaning in its full complexity from the source text, in this case Arabic, to the target text, English, according to the concept of equivalence in translation theory. The presentation will show how such a process generates the sort of thorough discussion and close text analysis which allows students to gain valuable insight into this central idiom of Arabic. A variety of translation methods will be highlighted, gleaned from the presenter’s extensive work with advanced/superior students in the Center for Arabic Study Abroad (CASA) program at the American University in Cairo. These begin with the literal rendering of expressions, with the purpose of reinforcing vocabulary learning and practicing the rules of derivational morphology as they form each word, since the larger context remains that of an AFL class, as opposed to a translation skills program. However, departures from the literal approach are subsequently explored by degrees, moving along the spectrum of functional and pragmatic freer translations in order to transmit the ‘real’ meaning in readable English to the target audience- no matter how culture/religion specific the expression- while remaining faithful to the original. Samples from students’ work pre and post discussion will be shared, demonstrating how class consensus is formed as to the final English rendering, proposed as the closest match to the Arabic, and shown to be the result of the above activities. Finally, a few examples of translation work which students have gone on to publish will be shared to corroborate the effectiveness of this teaching practice. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=superior%20level%20proficiency%20in%20Arabic%20as%20a%20foreign%20language" title="superior level proficiency in Arabic as a foreign language">superior level proficiency in Arabic as a foreign language</a>, <a href="https://publications.waset.org/abstracts/search?q=teaching%20Arabic%20as%20a%20foreign%20language" title=" teaching Arabic as a foreign language"> teaching Arabic as a foreign language</a>, <a href="https://publications.waset.org/abstracts/search?q=teaching%20idiomatic%20expressions" title=" teaching idiomatic expressions"> teaching idiomatic expressions</a>, <a href="https://publications.waset.org/abstracts/search?q=translation%20in%20foreign%20language%20teaching" title=" translation in foreign language teaching"> translation in foreign language teaching</a> </p> <a href="https://publications.waset.org/abstracts/78355/rendering-religious-references-in-english-naguib-mahfouz-in-the-arabic-as-a-foreign-language-classroom" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78355.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">198</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" 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