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Abou El-Kheir</title> <meta name="description" content="Search results for: A. Abou El-Kheir"> <meta name="keywords" content="A. Abou El-Kheir"> <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 ml-auto" type="button" data-toggle="collapse" data-target="#navbarMenu" aria-controls="navbarMenu" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="w-100"> <div class="d-none d-lg-flex flex-row-reverse"> <form method="get" action="https://waset.org/search" class="form-inline my-2 my-lg-0"> <input class="form-control mr-sm-2" type="search" placeholder="Search Conferences" value="A. 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Abou El-Kheir"> <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> 74</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: A. Abou El-Kheir</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">74</span> Information Technology Governance Implementation and Its Determinants in the Egyptian Market</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nariman%20O.%20Kandil">Nariman O. Kandil</a>, <a href="https://publications.waset.org/abstracts/search?q=Ehab%20K.%20Abou-Elkheir"> Ehab K. Abou-Elkheir</a>, <a href="https://publications.waset.org/abstracts/search?q=Amr%20M.%20Kotb"> Amr M. Kotb</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Effective IT governance guarantees the strategic alignment of IT and business goals, risk mitigation control, and better IT and business performance. This study seeks to examine empirically the extent of IT governance implementation within the firms listed on the Egyptian stock exchange (EGX30) and its determinants. Accordingly, 18 semi-structured interviews face to face, phone, and video-conferencing interviews using various tools (e.g., WebEx, Zoom, and Microsoft Teams) were undertaken at the interviewees’ offices in Egypt between the end of November 2019 and the end of August 2020. Results suggest that there are variances in the extent of IT Governance (ITG) implementation within the firms listed on the Egyptian stock exchange (EGX30), mainly caused by the industry type and internal and external triggers. The results also suggest that the organization size, the type of auditor, the criticality of the industry, the effective processes & KPIs, and the information intensity expertise of the CIO have a significant impact on IT governance implementation within the firms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=effective%20IT%20governance" title="effective IT governance">effective IT governance</a>, <a href="https://publications.waset.org/abstracts/search?q=Egyptian%20market" title=" Egyptian market"> Egyptian market</a>, <a href="https://publications.waset.org/abstracts/search?q=information%20security" title=" information security"> information security</a>, <a href="https://publications.waset.org/abstracts/search?q=risk%20controls" title=" risk controls"> risk controls</a> </p> <a href="https://publications.waset.org/abstracts/155186/information-technology-governance-implementation-and-its-determinants-in-the-egyptian-market" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/155186.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">73</span> Protein-Starch-Potassium Iodide Composite as a Sensor for Chlorine in Water</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Mowafi">S. Mowafi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Abou%20El-Kheir"> A. Abou El-Kheir</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Abou%20Taleb"> M. Abou Taleb</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20El-Sayed"> H. El-Sayed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Two proteinic biopolymers; namely keratin and sericin, were extracted from their respective natural resources by simple appropriate methods. The said proteins were dissolved in the appropriate solvents followed by regeneration in a form of film polyvinyl alcohol. Protein-starch-potassium iodide (PSPI) composite was prepared by anchoring starch and potassium iodide mixture onto the film surface using appropriate polymeric material. The possibility of using PSPI composite for determination of the concentration of chlorine ions in domestic as well as industrial water was examined. The concentration of chlorine in water was determined spectrophotometrically by measuring the intensity of blue colour of formed between starch and the released iodine obtained by interaction of potassium iodide chlorine in the tested water sample. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chlorine" title="chlorine">chlorine</a>, <a href="https://publications.waset.org/abstracts/search?q=protein" title=" protein"> protein</a>, <a href="https://publications.waset.org/abstracts/search?q=potassium%20iodide" title=" potassium iodide"> potassium iodide</a>, <a href="https://publications.waset.org/abstracts/search?q=water" title=" water"> water</a> </p> <a href="https://publications.waset.org/abstracts/54381/protein-starch-potassium-iodide-composite-as-a-sensor-for-chlorine-in-water" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54381.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">377</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">72</span> Protein-Thiocyanate Composite as a Sensor for Iron III Cations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hosam%20El-Sayed">Hosam El-Sayed</a>, <a href="https://publications.waset.org/abstracts/search?q=Amira%20%20Abou%20El-Kheir"> Amira Abou El-Kheir</a>, <a href="https://publications.waset.org/abstracts/search?q=Salwa%20Mowafi"> Salwa Mowafi</a>, <a href="https://publications.waset.org/abstracts/search?q=Marwa%20Abou%20Taleb"> Marwa Abou Taleb</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Two proteinic biopolymers; namely keratin and sericin, were extracted from their respective natural resources by simple appropriate methods. The said proteins were dissolved in the appropriate solvents followed by regeneration in a form of film polyvinyl alcohol. Proteinium thiocyanate (PTC) composite was prepared by reaction of a regenerated film with potassium thiocyanate in acid medium. In another experiment, the said acidified proteins were reacted with potassium thiocyante before dissolution and regeneration in a form of PTC composite. The possibility of using PTC composite for determination of the concentration of iron III ions in domestic as well as industrial water was examined. The concentration of iron III cations in water was determined spectrophotometrically by measuring the intensity of blood red colour of iron III thiocyanate obtained by interaction of PTC with iron III cation in the tested water sample. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=iron%20III%20cations" title="iron III cations">iron III cations</a>, <a href="https://publications.waset.org/abstracts/search?q=protein" title=" protein"> protein</a>, <a href="https://publications.waset.org/abstracts/search?q=sensor" title=" sensor"> sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=thiocyanate" title=" thiocyanate"> thiocyanate</a>, <a href="https://publications.waset.org/abstracts/search?q=water" title=" water"> water</a> </p> <a href="https://publications.waset.org/abstracts/52322/protein-thiocyanate-composite-as-a-sensor-for-iron-iii-cations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52322.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">429</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">71</span> Utilization and Characterizations of Olive Oil Industry By-Products</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sawsan%20Dacrory">Sawsan Dacrory</a>, <a href="https://publications.waset.org/abstracts/search?q=Hussein%20Abou-Yousef"> Hussein Abou-Yousef</a>, <a href="https://publications.waset.org/abstracts/search?q=Samir%20Kamel"> Samir Kamel</a>, <a href="https://publications.waset.org/abstracts/search?q=Ragab%20E.%20Abou-Zeid"> Ragab E. Abou-Zeid</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20S.%20Abdel-Aziz"> Mohamed S. Abdel-Aziz</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Elbadry"> Mohamed Elbadry</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A considerable amount of lignocellulosic by-product could be obtained from olive pulp during olive oil extraction industry. The major constituents of the olive pulp are husks and seeds. The separation of each portion of olive pulp (seeds and husks) was carried out by water flotation where seeds were sediment in the bottom. Both seeds and husks were dignified by 15% NaOH followed by complete lignin removal by using sodium chlorite in acidic medium. The isolated holocellulose, α-cellulose, hydrogel and CMC which prepared from cellulose of both seeds and husk fractions were characterized by FTIR and SEM. The present study focused on the investigation of the chemical components of the lignocellulosic fraction of olive pulp. Biofunctionlization of hydrogel was achieved through loading of silver nanoparticles AgNPs in to the prepared hydrogel. The antimicrobial activity of the loaded silver hydrogel against G-ve, and G+ve, and candida was demonstrated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cellulose" title="cellulose">cellulose</a>, <a href="https://publications.waset.org/abstracts/search?q=carboxymethyle%20cellulose" title=" carboxymethyle cellulose"> carboxymethyle cellulose</a>, <a href="https://publications.waset.org/abstracts/search?q=olive%20pulp" title=" olive pulp"> olive pulp</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogel" title=" hydrogel"> hydrogel</a> </p> <a href="https://publications.waset.org/abstracts/40837/utilization-and-characterizations-of-olive-oil-industry-by-products" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40837.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">474</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">70</span> The Dynamics of Algeria’s Natural Gas Exports to Europe: Evidence from ARDL Bounds Testing Approach with Breakpoints</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hicham%20Benamirouche">Hicham Benamirouche</a>, <a href="https://publications.waset.org/abstracts/search?q=Oum%20Elkheir%20Moussi"> Oum Elkheir Moussi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of the study is to examine the dynamics of Algeria’s natural gas exports through the Autoregressive Distributed Lag (ARDL) bounds testing approach with break points. The analysis was carried out for the period from 1967 to 2015. Based on imperfect substitution specification, the ARDL approach reveals a long-run equilibrium relationship between Algeria’s Natural gas exports and their determinant factors (Algeria’s gas reserves, Domestic gas consumption, Europe’s GDP per capita, relative prices, the European gas production and the market share of competitors). All the long-run elasticities estimated are statistically significant with a large impact of domestic factors, which constitute the supply constraints. In short term, the elasticities are statistically significant, and almost comparable to those of the long term. Furthermore, the speed of adjustment towards long-run equilibrium is less than one year because of the little flexibility of the long term export contracts. Two break points have been estimated when we employ the domestic gas consumption as a break variable; 1984 and 2010, which reflect the arbitration policy between the domestic gas market and gas exports. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=natural%20gas%20exports" title="natural gas exports">natural gas exports</a>, <a href="https://publications.waset.org/abstracts/search?q=elasticity" title=" elasticity"> elasticity</a>, <a href="https://publications.waset.org/abstracts/search?q=ARDL%20bounds%20testing" title=" ARDL bounds testing"> ARDL bounds testing</a>, <a href="https://publications.waset.org/abstracts/search?q=break%20points" title=" break points"> break points</a>, <a href="https://publications.waset.org/abstracts/search?q=Algeria" title=" Algeria"> Algeria</a> </p> <a href="https://publications.waset.org/abstracts/82749/the-dynamics-of-algerias-natural-gas-exports-to-europe-evidence-from-ardl-bounds-testing-approach-with-breakpoints" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82749.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">199</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">69</span> Effect of Nitrogen and/or Bio-Fertilizer on the Yield, Total Flavonoids, Carbohydrate Contents, Essential Oil Quantity and Constituents of Dill Plants</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20S.%20Aly">Mohammed S. Aly</a>, <a href="https://publications.waset.org/abstracts/search?q=Abou-Zeid%20N.%20El-Shahat"> Abou-Zeid N. El-Shahat</a>, <a href="https://publications.waset.org/abstracts/search?q=Nabila%20Y.%20Naguib"> Nabila Y. Naguib</a>, <a href="https://publications.waset.org/abstracts/search?q=Huussie%20A.%20Said-Al%20Ahl"> Huussie A. Said-Al Ahl</a>, <a href="https://publications.waset.org/abstracts/search?q=Atef%20M.%20Zakaria"> Atef M. Zakaria</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20A.%20Abou%20Dahab"> Mohamed A. Abou Dahab</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study was conducted during two successive seasons of 2000/2001 and 2001/2002 to evaluate the response of Anethum graveolens L. plants to nitrogen fertilizer with or without bio-fertilizer on fruits yield, total flavonoids and carbohydrates content, essential oil yield and constituents. Results cleared that the treatment of 60 Kg N/feddan without and with bio-fertilizer gave the highest umbels number per plant through the two seasons and these increments were significant in comparison with control plants. Meanwhile, fruits weight (g/plant) showed significant increase with the treatments of nitrogen fertilizers alone and combined with bio-fertilizers compared with control plants in the first and second season. Maximum increments were resulted with the previous treatment (60 Kg N/fed). Fruits yield (Kg/fed) revealed the same trend of fruits weight (g/plant). Total flavonoids contents were significantly increased with all of used treatments. Maximum increase was noticed with bio-fertilizers combined with 60 Kg N/fed during two seasons. Total carbohydrate contents showed significant increase with applied nitrogen fertilizers treatments as alone, meanwhile total carbohydrate contents were increased non-significantly with the other used treatments during the two seasons in comparison with control plants content. The treatment of bio-fertilizer and in most of nitrogen fertilizer levels significantly increased essential oil percentage, content and yield. The treatment of 60 Kg N/fed with or without bio-fertilizer gave the best values. All identified compounds were observed in the essential oil of all treatments. The major compounds were limonene, carvone and dillapiole. The most effective fertilization on limonene content was 40 Kg N/fed and/or bio-fertilizers. Meanwhile 20 Kg N/fed with or without bio-fertilizers increased carvone, but most of fertilization treatments except those of bio-fertlizers and 40 Kg N/fed increased dillapiole content. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbohydrates" title="carbohydrates">carbohydrates</a>, <a href="https://publications.waset.org/abstracts/search?q=dill" title=" dill"> dill</a>, <a href="https://publications.waset.org/abstracts/search?q=essential%20oil" title=" essential oil"> essential oil</a>, <a href="https://publications.waset.org/abstracts/search?q=fertilizer" title=" fertilizer"> fertilizer</a>, <a href="https://publications.waset.org/abstracts/search?q=flavonoids" title=" flavonoids"> flavonoids</a> </p> <a href="https://publications.waset.org/abstracts/13960/effect-of-nitrogen-andor-bio-fertilizer-on-the-yield-total-flavonoids-carbohydrate-contents-essential-oil-quantity-and-constituents-of-dill-plants" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13960.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">419</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">68</span> Preparation and Characterization of Chitosan / Polyacrylic Acid / Ag-nanoparticles Composite Membranes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdel-Mohdy">Abdel-Mohdy</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Abou-Okeil"> A. Abou-Okeil</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20El-Sabagh"> S. El-Sabagh</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20M.%20El-Sawy"> S. M. El-Sawy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Chitosan polyacrylic acid composite membranes were prepared by a bulk polymerization method in the presence of N, N'-methylene bisacrylamide (crosslinker) and ammonium persulphate as initiator. Membranes prepared from this copolymer in presence and absence of Ag nanoparticles were characterized by measuring mechanical and physical properties, water up-take and antibacterial properties. The results obtained indicated that the prepared membranes have antibacterial properties which increases with adding Ag nanoparticles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ag%20nanoparticles" title="Ag nanoparticles ">Ag nanoparticles </a>, <a href="https://publications.waset.org/abstracts/search?q=antimicrobial" title=" antimicrobial"> antimicrobial</a>, <a href="https://publications.waset.org/abstracts/search?q=Membrane" title=" Membrane"> Membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=composites" title=" composites"> composites</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=physical%20properties" title=" physical properties"> physical properties</a> </p> <a href="https://publications.waset.org/abstracts/33310/preparation-and-characterization-of-chitosan-polyacrylic-acid-ag-nanoparticles-composite-membranes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33310.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">470</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">67</span> Antimicrobial and Haemostatic Effect of Chitosan/Polyacrylic Acid Hybrid Membranes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20A.%20Abdel-Mohdy">F. A. Abdel-Mohdy</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20K.%20El-Bisi"> M. K. El-Bisi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Abou-Okeil"> A. Abou-Okeil</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20A.%20Sleem"> A. A. Sleem</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20El-Sabbagh"> S. El-Sabbagh</a>, <a href="https://publications.waset.org/abstracts/search?q=Kawther%20El-Shafei"> Kawther El-Shafei</a>, <a href="https://publications.waset.org/abstracts/search?q=Hoda%20S.%20El-Sayed"> Hoda S. El-Sayed</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20M.%20ElSawy"> S. M. ElSawy </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Chitosan/ polyacrylic acid membranes containing different amounts of Al2(SO4) and/or TiO2 were prepared. The prepared membranes were characterized by measuring mechanical properties, such as tensile strength and elongation at break, swelling properties, antimicrobial properties against gram-positive and gram-negative bacteria and blood clotting. The results obtained indicate that the presence of Al2(SO4) and TiO2 in the membrane formulations have an incremental effect on the antimicrobial properties and blood clotting in albino rate. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chitosan" title="Chitosan">Chitosan</a>, <a href="https://publications.waset.org/abstracts/search?q=acrylic%20acid" title=" acrylic acid"> acrylic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=antibacterial" title=" antibacterial"> antibacterial</a>, <a href="https://publications.waset.org/abstracts/search?q=blood%20clotting" title=" blood clotting"> blood clotting</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane" title=" membrane"> membrane</a> </p> <a href="https://publications.waset.org/abstracts/33312/antimicrobial-and-haemostatic-effect-of-chitosanpolyacrylic-acid-hybrid-membranes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33312.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">489</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">66</span> Digitalized Public Sector Practices: Opportunities for Open Innovation in Rwanda</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Reem%20Abou%20Refaie">Reem Abou Refaie</a>, <a href="https://publications.waset.org/abstracts/search?q=Christoph%20Meinel"> Christoph Meinel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper explores the impact of the COVID-19 crisis on the internal as well as external digitalized work practices of public service providers as part of a Public-Private Partnership Model. It focuses on the effect of uncertainty on generating Open Innovation practices. Our inquiry relies on semi-structured interviews (n=14) from a case study of Rwanda’s Public Service Delivery System in the context of research cooperation with IremboGov, the country’s One-Stop-Shop Platform for public services. It presents four propositions on harnessing opportunities for OI in the context of the public sector beyond the pandemic response. Practitioners can find characterizations of OI opportunities and gain insights on fostering OI in Public Sector Organizations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=open%20innovation" title="open innovation">open innovation</a>, <a href="https://publications.waset.org/abstracts/search?q=digital%20transformation" title=" digital transformation"> digital transformation</a>, <a href="https://publications.waset.org/abstracts/search?q=public%20sector" title=" public sector"> public sector</a>, <a href="https://publications.waset.org/abstracts/search?q=Rwanda" title=" Rwanda"> Rwanda</a> </p> <a href="https://publications.waset.org/abstracts/147708/digitalized-public-sector-practices-opportunities-for-open-innovation-in-rwanda" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/147708.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">128</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">65</span> Application of Neural Petri Net to Electric Control System Fault Diagnosis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sadiq%20J.%20Abou-Loukh">Sadiq J. Abou-Loukh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present work deals with implementation of Petri nets, which own the perfect ability of modeling, are used to establish a fault diagnosis model. Fault diagnosis of a control system received considerable attention in the last decades. The formalism of representing neural networks based on Petri nets has been presented. Neural Petri Net (NPN) reasoning model is investigated and developed for the fault diagnosis process of electric control system. The proposed NPN has the characteristics of easy establishment and high efficiency, and fault status within the system can be described clearly when compared with traditional testing methods. The proposed system is tested and the simulation results are given. The implementation explains the advantages of using NPN method and can be used as a guide for different online applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=petri%20net" title="petri net">petri net</a>, <a href="https://publications.waset.org/abstracts/search?q=neural%20petri%20net" title=" neural petri net"> neural petri net</a>, <a href="https://publications.waset.org/abstracts/search?q=electric%20control%20system" title=" electric control system"> electric control system</a>, <a href="https://publications.waset.org/abstracts/search?q=fault%20diagnosis" title=" fault diagnosis"> fault diagnosis</a> </p> <a href="https://publications.waset.org/abstracts/16653/application-of-neural-petri-net-to-electric-control-system-fault-diagnosis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16653.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">474</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">64</span> Radiation Hardness Materials Article Review</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Abou%20El-Azm">S. Abou El-Azm</a>, <a href="https://publications.waset.org/abstracts/search?q=U.%20Kruchonak"> U. Kruchonak</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Gostkin"> M. Gostkin</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Guskov"> A. Guskov</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Zhemchugov"> A. Zhemchugov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Semiconductor detectors are widely used in nuclear physics and high-energy physics experiments. The application of semiconductor detectors could be limited by their ultimate radiation resistance. The increase of radiation defects concentration leads to significant degradation of the working parameters of semiconductor detectors. The investigation of radiation defects properties in order to enhance the radiation hardness of semiconductor detectors is an important task for the successful implementation of a number of nuclear physics experiments; we presented some information about radiation hardness materials like diamond, sapphire and CdTe. Also, the results of measurements I-V characteristics, charge collection efficiency and its dependence on the bias voltage for different doses of high resistivity (GaAs: Cr) and Si at LINAC-200 accelerator and reactor IBR-2 are presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=semiconductor%20detectors" title="semiconductor detectors">semiconductor detectors</a>, <a href="https://publications.waset.org/abstracts/search?q=radiation%20hardness" title=" radiation hardness"> radiation hardness</a>, <a href="https://publications.waset.org/abstracts/search?q=GaAs" title=" GaAs"> GaAs</a>, <a href="https://publications.waset.org/abstracts/search?q=Si" title=" Si"> Si</a>, <a href="https://publications.waset.org/abstracts/search?q=CCE" title=" CCE"> CCE</a>, <a href="https://publications.waset.org/abstracts/search?q=I-V" title=" I-V"> I-V</a>, <a href="https://publications.waset.org/abstracts/search?q=C-V" title=" C-V"> C-V</a> </p> <a href="https://publications.waset.org/abstracts/146949/radiation-hardness-materials-article-review" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/146949.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">113</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">63</span> Simplified Linearized Layering Method for Stress Intensity Factor Determination</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jeries%20J.%20Abou-Hanna">Jeries J. Abou-Hanna</a>, <a href="https://publications.waset.org/abstracts/search?q=Bradley%20Storm"> Bradley Storm</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper looks to reduce the complexity of determining stress intensity factors while maintaining high levels of accuracy by the use of a linearized layering approach. Many techniques for stress intensity factor determination exist, but they can be limited by conservative results, requiring too many user parameters, or by being too computationally intensive. Multiple notch geometries with various crack lengths were investigated in this study to better understand the effectiveness of the proposed method. By linearizing the average stresses in radial layers around the crack tip, stress intensity factors were found to have error ranging from -10.03% to 8.94% when compared to analytically exact solutions. This approach proved to be a robust and efficient method of accurately determining stress intensity factors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fracture%20mechanics" title="fracture mechanics">fracture mechanics</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20method" title=" finite element method"> finite element method</a>, <a href="https://publications.waset.org/abstracts/search?q=stress%20intensity%20factor" title=" stress intensity factor"> stress intensity factor</a>, <a href="https://publications.waset.org/abstracts/search?q=stress%20linearization" title=" stress linearization"> stress linearization</a> </p> <a href="https://publications.waset.org/abstracts/146820/simplified-linearized-layering-method-for-stress-intensity-factor-determination" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/146820.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">143</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">62</span> Human Behavior Modeling in Video Surveillance of Conference Halls </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nour%20Charara">Nour Charara</a>, <a href="https://publications.waset.org/abstracts/search?q=Hussein%20Charara"> Hussein Charara</a>, <a href="https://publications.waset.org/abstracts/search?q=Omar%20Abou%20Khaled"> Omar Abou Khaled</a>, <a href="https://publications.waset.org/abstracts/search?q=Hani%20Abdallah"> Hani Abdallah</a>, <a href="https://publications.waset.org/abstracts/search?q=Elena%20Mugellini"> Elena Mugellini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we present a human behavior modeling approach in videos scenes. This approach is used to model the normal behaviors in the conference halls. We exploited the Probabilistic Latent Semantic Analysis technique (PLSA), using the 'Bag-of-Terms' paradigm, as a tool for exploring video data to learn the model by grouping similar activities. Our term vocabulary consists of 3D spatio-temporal patch groups assigned by the direction of motion. Our video representation ensures the spatial information, the object trajectory, and the motion. The main importance of this approach is that it can be adapted to detect abnormal behaviors in order to ensure and enhance human security. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=activity%20modeling" title="activity modeling">activity modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=clustering" title=" clustering"> clustering</a>, <a href="https://publications.waset.org/abstracts/search?q=PLSA" title=" PLSA"> PLSA</a>, <a href="https://publications.waset.org/abstracts/search?q=video%20representation" title=" video representation"> video representation</a> </p> <a href="https://publications.waset.org/abstracts/70466/human-behavior-modeling-in-video-surveillance-of-conference-halls" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/70466.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">394</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">61</span> Voice over IP Quality of Service Evaluation for Mobile Ad Hoc Network in an Indoor Environment for Different Voice Codecs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lina%20Abou%20Haibeh">Lina Abou Haibeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Nadir%20Hakem"> Nadir Hakem</a>, <a href="https://publications.waset.org/abstracts/search?q=Ousama%20Abu%20Safia"> Ousama Abu Safia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the performance and quality of Voice over IP (VoIP) calls carried over a Mobile Ad Hoc Network (MANET) which has a number of SIP nodes registered on a SIP Proxy are analyzed. The testing campaigns are carried out in an indoor corridor structure having a well-defined channel’s characteristics and model for the different voice codecs, G.711, G.727 and G.723.1. These voice codecs are commonly used in VoIP technology. The calls’ quality are evaluated using four Quality of Service (QoS) metrics, namely, mean opinion score (MOS), jitter, delay, and packet loss. The relationship between the wireless channel’s parameters and the optimum codec is well-established. According to the experimental results, the voice codec G.711 has the best performance for the proposed MANET topology <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=wireless%20channel%20modelling" title="wireless channel modelling">wireless channel modelling</a>, <a href="https://publications.waset.org/abstracts/search?q=Voip" title=" Voip"> Voip</a>, <a href="https://publications.waset.org/abstracts/search?q=MANET" title=" MANET"> MANET</a>, <a href="https://publications.waset.org/abstracts/search?q=session%20initiation%20protocol%20%28SIP%29" title=" session initiation protocol (SIP)"> session initiation protocol (SIP)</a>, <a href="https://publications.waset.org/abstracts/search?q=QoS" title=" QoS"> QoS</a> </p> <a href="https://publications.waset.org/abstracts/74102/voice-over-ip-quality-of-service-evaluation-for-mobile-ad-hoc-network-in-an-indoor-environment-for-different-voice-codecs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74102.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">60</span> Probabilistic Analysis of Fiber-Reinforced Infinite Slopes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Assile%20Abou%20Diab">Assile Abou Diab</a>, <a href="https://publications.waset.org/abstracts/search?q=Shadi%20Najjar"> Shadi Najjar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fiber-reinforcement is an effective soil improvement technique for applications involving the prevention of shallow failures on the slope face and the repair of existing slope failures. A typical application is the stabilization of cohesionless infinite slopes. The objective of this paper is to present a probabilistic, reliability-based methodology (based on Monte Carlo simulations) for the design of a practical fiber-reinforced cohesionless infinite slope, taking into consideration the impact of various sources of uncertainty. Recommendations are made regarding the required factors of safety that need to be used to achieve a given target reliability level. These factors of safety could differ from the traditional deterministic factor of safety. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=factor%20of%20safety" title="factor of safety">factor of safety</a>, <a href="https://publications.waset.org/abstracts/search?q=fiber%20reinforcement" title=" fiber reinforcement"> fiber reinforcement</a>, <a href="https://publications.waset.org/abstracts/search?q=infinite%20slope" title=" infinite slope"> infinite slope</a>, <a href="https://publications.waset.org/abstracts/search?q=reliability-based%20design" title=" reliability-based design"> reliability-based design</a>, <a href="https://publications.waset.org/abstracts/search?q=uncertainty" title=" uncertainty"> uncertainty</a> </p> <a href="https://publications.waset.org/abstracts/75670/probabilistic-analysis-of-fiber-reinforced-infinite-slopes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75670.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">365</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">59</span> Antecedents and Consequences of Social Media Adoption in Travel and Tourism: Evidence from Customers and Industry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20A.%20Abou-Shouk">Mohamed A. Abou-Shouk</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahamoud%20M.%20Hewedi"> Mahamoud M. Hewedi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study extends technology acceptance model (TAM) to investigate the antecedents and consequences of social media adoption by tourists and travel agents. It compares their perceptions on social media adoption and its consequences. Online survey was addressed to tourists and travel agents for data collection purposes. Structural equation modelling was employed for analysis purposes. The findings revealed that the majority of tourists and travel agents involved in the study believe in the usefulness of social media adoption for travel planning and marketing purposes. They agree that adopting social media could change the attitude of tourists towards specific destination or attraction and influence their purchasing decisions. This study contributes to knowledge by extending TAM and provides some managerial implication to marketers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=TAM" title="TAM">TAM</a>, <a href="https://publications.waset.org/abstracts/search?q=social%20media" title=" social media"> social media</a>, <a href="https://publications.waset.org/abstracts/search?q=travel%20and%20tourism" title=" travel and tourism"> travel and tourism</a>, <a href="https://publications.waset.org/abstracts/search?q=travel%20agents" title=" travel agents"> travel agents</a> </p> <a href="https://publications.waset.org/abstracts/36787/antecedents-and-consequences-of-social-media-adoption-in-travel-and-tourism-evidence-from-customers-and-industry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36787.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">412</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">58</span> Potential Risk Factors Associated with Sole Hemorrhages Causing Lameness in Egyptian Water Buffaloes and Native Breed Cows</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Waleed%20El-Said%20Abou%20El-Amaiem">Waleed El-Said Abou El-Amaiem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sole hemorrhages are considered as a main cause for sub clinical laminitis. In this study we aimed at discussing the most prominent risk factors associated with sole hemorrhages causing lameness in Egyptian water buffaloes and native breed cows. The final multivariate logistic regression model showed, a significant association between sub acute ruminal acidosis (P< 0.05), limb affected (P< 0.05) and weight (P< 0.05) and sole hemorrhages causing lameness in Egyptian water buffaloes and native breed cows. According to our knowledge, this is the first paper to discuss the risk factors associated with sole hemorrhages causing lameness in Egyptian water buffaloes and native breed cows. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lameness" title="lameness">lameness</a>, <a href="https://publications.waset.org/abstracts/search?q=buffalo" title=" buffalo"> buffalo</a>, <a href="https://publications.waset.org/abstracts/search?q=sole%20hemorrhages" title=" sole hemorrhages"> sole hemorrhages</a>, <a href="https://publications.waset.org/abstracts/search?q=breed%20cows" title=" breed cows"> breed cows</a> </p> <a href="https://publications.waset.org/abstracts/28867/potential-risk-factors-associated-with-sole-hemorrhages-causing-lameness-in-egyptian-water-buffaloes-and-native-breed-cows" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28867.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">450</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">57</span> Hydro-Mechanical Behavior of Calcareous Soils in Arid Region </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=I.%20Goual">I. Goual</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20S.%20Goual"> M. S. Goual</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20K.%20Gueddouda"> M. K. Gueddouda</a>, <a href="https://publications.waset.org/abstracts/search?q=Ta%C3%AFbi%20Sa%C3%AFd"> Taïbi Saïd</a>, <a href="https://publications.waset.org/abstracts/search?q=Abou-Bekr%20Nabil"> Abou-Bekr Nabil</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Ferhat"> A. Ferhat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents the study of hydro mechanical behavior of this optimal mixture. A first experimental phase was carried out in order to find the optimal mixture. This showed that the material composed of 80% tuff and 20% calcareous sand provides the maximum mechanical strength. The second experimental phase concerns the study of the drying- wetting behavior of the optimal mixture was carried out on slurry samples and compacted samples at the MPO. Experimental results let to deduce the parameters necessary for the prediction of the hydro-mechanical behavior of pavement formulated from tuff and calcareous sand mixtures, related to moisture. This optimal mixture satisfies the regulation rules and hence constitutes a good local eco-material, abundantly available, for the conception of pavements. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tuff" title="tuff">tuff</a>, <a href="https://publications.waset.org/abstracts/search?q=sandy%20calcareous" title=" sandy calcareous"> sandy calcareous</a>, <a href="https://publications.waset.org/abstracts/search?q=road%20engineering" title=" road engineering"> road engineering</a>, <a href="https://publications.waset.org/abstracts/search?q=hydro%20mechanical%20behaviour" title=" hydro mechanical behaviour"> hydro mechanical behaviour</a>, <a href="https://publications.waset.org/abstracts/search?q=suction" title=" suction"> suction</a> </p> <a href="https://publications.waset.org/abstracts/15411/hydro-mechanical-behavior-of-calcareous-soils-in-arid-region" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15411.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">507</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">56</span> Performance of Stiffened Slender Built up Steel I-Columns</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20E.%20Abou-Hashem%20El%20Dib">M. E. Abou-Hashem El Dib</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20K.%20Swailem"> M. K. Swailem</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20M.%20Metwally"> M. M. Metwally</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20I.%20El%20Awady"> A. I. El Awady</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present work illustrates a parametric study for the effect of stiffeners on the performance of slender built up steel I-columns. To achieve the desired analysis, finite element technique is used to develop nonlinear three-dimensional models representing the investigated columns. The finite element program (ANSYS 13.0) is used as a calculation tool for the necessary nonlinear analysis. A validation of the obtained numerical results is achieved. The considered parameters in the study are the column slenderness ratio and the horizontal stiffener's dimensions as well as the number of stiffeners. The dimensions of the stiffeners considered in the analysis are the stiffener width and the stiffener thickness. Numerical results signify a considerable effect of stiffeners on the performance and failure load of slender built up steel I-columns. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=columns" title="columns">columns</a>, <a href="https://publications.waset.org/abstracts/search?q=local%20buckling" title=" local buckling"> local buckling</a>, <a href="https://publications.waset.org/abstracts/search?q=slender" title=" slender"> slender</a>, <a href="https://publications.waset.org/abstracts/search?q=stiffener" title=" stiffener"> stiffener</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20walled%20section" title=" thin walled section"> thin walled section</a> </p> <a href="https://publications.waset.org/abstracts/47374/performance-of-stiffened-slender-built-up-steel-i-columns" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47374.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">55</span> Robust Image Design Based Steganographic System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sadiq%20J.%20Abou-Loukh">Sadiq J. Abou-Loukh</a>, <a href="https://publications.waset.org/abstracts/search?q=Hanan%20M.%20Habbi"> Hanan M. Habbi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a steganography to hide the transmitted information without excite suspicious and also illustrates the level of secrecy that can be increased by using cryptography techniques. The proposed system has been implemented firstly by encrypted image file one time pad key and secondly encrypted message that hidden to perform encryption followed by image embedding. Then the new image file will be created from the original image by using four triangles operation, the new image is processed by one of two image processing techniques. The proposed two processing techniques are thresholding and differential predictive coding (DPC). Afterwards, encryption or decryption keys are generated by functional key generator. The generator key is used one time only. Encrypted text will be hidden in the places that are not used for image processing and key generation system has high embedding rate (0.1875 character/pixel) for true color image (24 bit depth). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=encryption" title="encryption">encryption</a>, <a href="https://publications.waset.org/abstracts/search?q=thresholding" title=" thresholding"> thresholding</a>, <a href="https://publications.waset.org/abstracts/search?q=differential%0D%0Apredictive%20coding" title=" differential predictive coding"> differential predictive coding</a>, <a href="https://publications.waset.org/abstracts/search?q=four%20triangles%20operation" title=" four triangles operation "> four triangles operation </a> </p> <a href="https://publications.waset.org/abstracts/16654/robust-image-design-based-steganographic-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16654.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">493</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">54</span> Hydro-Mechanical Behavior of a Tuff and Calcareous Sand Mixture for Use in Pavement in Arid Region</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=I.%20Goual">I. Goual</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20S.%20Goual"> M. S. Goual</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20K.%20Gueddouda"> M. K. Gueddouda</a>, <a href="https://publications.waset.org/abstracts/search?q=Ta%C3%AFbi%20Sa%C3%AFd"> Taïbi Saïd</a>, <a href="https://publications.waset.org/abstracts/search?q=Abou-Bekr%20Nabil"> Abou-Bekr Nabil</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Ferhat"> A. Ferhat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of the paper is to study the hydro-mechanical behavior of a tuff and calcareous sand mixture. A first experimental phase was carried out in order to find the optimal mixture. This showed that the material composed of 80% tuff and 20% calcareous sand provides the maximum mechanical strength. The second experimental phase concerns the study of the drying-wetting behavior of the optimal mixture was carried out on slurry samples and compacted samples at the MPO. Experimental results let to deduce the parameters necessary for the prediction of the hydro-mechanical behavior of pavement formulated from tuff and calcareous sand mixtures, related to moisture. This optimal mixture satisfies the regulation rules and hence constitutes a good local eco-material, abundantly available, for the conception of pavements. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tuff" title="tuff">tuff</a>, <a href="https://publications.waset.org/abstracts/search?q=sandy%20calcareous" title=" sandy calcareous"> sandy calcareous</a>, <a href="https://publications.waset.org/abstracts/search?q=road%20engineering" title=" road engineering"> road engineering</a>, <a href="https://publications.waset.org/abstracts/search?q=hydro%20mechanical%20behaviour" title=" hydro mechanical behaviour"> hydro mechanical behaviour</a>, <a href="https://publications.waset.org/abstracts/search?q=suction" title=" suction"> suction</a> </p> <a href="https://publications.waset.org/abstracts/14118/hydro-mechanical-behavior-of-a-tuff-and-calcareous-sand-mixture-for-use-in-pavement-in-arid-region" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14118.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">440</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">53</span> Effect of Stiffeners on the Behavior of Slender Built up Steel I-Beams</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20E.%20Abou-Hashem%20El%20Dib">M. E. Abou-Hashem El Dib</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20K.%20Swailem"> M. K. Swailem</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20M.%20Metwally"> M. M. Metwally</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20I.%20El%20Awady"> A. I. El Awady</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents the effect of stiffeners on the behavior of slender steel I-beams. Nonlinear three dimensional finite element models are developed to represent the stiffened steel I-beams. The well established finite element (ANSYS 13.0) program is used to simulate the geometric and material nonlinear nature of the problem. Verification is achieved by comparing the obtained numerical results with the results of previous published experimental work. The parameters considered in the analysis are the horizontal stiffener's position and the horizontal stiffener's dimensions as well as the number of vertical stiffeners. The studied dimensions of the horizontal stiffeners include the stiffener width, the stiffener thickness and the stiffener length. The results of the achieved numerical parametric study for slender steel I-beams show the significant effect of stiffeners on the beam behavior and its failure load. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=beams" title="beams">beams</a>, <a href="https://publications.waset.org/abstracts/search?q=local%20buckling" title=" local buckling"> local buckling</a>, <a href="https://publications.waset.org/abstracts/search?q=slender" title=" slender"> slender</a>, <a href="https://publications.waset.org/abstracts/search?q=stiffener" title=" stiffener"> stiffener</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20walled%20section" title=" thin walled section"> thin walled section</a> </p> <a href="https://publications.waset.org/abstracts/45085/effect-of-stiffeners-on-the-behavior-of-slender-built-up-steel-i-beams" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45085.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">279</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">52</span> Ultra-High Precision Diamond Turning of Infrared Lenses</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khaled%20Abou-El-Hossein">Khaled Abou-El-Hossein</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The presentation will address the features of two IR convex lenses that have been manufactured using an ultra-high precision machining centre based on single-point diamond turning. The lenses are made from silicon and germanium with a radius of curvature of 500 mm. Because of the brittle nature of silicon and germanium, machining parameters were selected in such a way that ductile regime was achieved. The cutting speed was 800 rpm while the feed rate and depth cut were 20 mm/min and 20 um, respectively. Although both materials comprise a mono-crystalline microstructure and are quite similar in terms of optical properties, machining of silicon was accompanied with more difficulties in terms of form accuracy compared to germanium machining. The P-V error of the silicon profile was 0.222 um while it was only 0.055 um for the germanium lens. This could be attributed to the accelerated wear that takes place on the tool edge when turning mono-crystalline silicon. Currently, we are using other ranges of the machining parameters in order to determine their optimal range that could yield satisfactory performance in terms of form accuracy when fabricating silicon lenses. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=diamond%20turning" title="diamond turning">diamond turning</a>, <a href="https://publications.waset.org/abstracts/search?q=optical%20surfaces" title=" optical surfaces"> optical surfaces</a>, <a href="https://publications.waset.org/abstracts/search?q=precision%20machining" title=" precision machining"> precision machining</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20roughness" title=" surface roughness"> surface roughness</a> </p> <a href="https://publications.waset.org/abstracts/61253/ultra-high-precision-diamond-turning-of-infrared-lenses" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61253.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">317</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">51</span> Innovative Textile Design Using in-situ Ag NPs incorporation into Natural Fabric Matrix</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Rehan">M. Rehan</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Mashaly"> H. Mashaly</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Emam"> H. Emam</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Abou%20El-Kheir"> A. Abou El-Kheir</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Mowafi">S. Mowafi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, we will study a simple highly efficient technique to impart multi functional properties to different fabric substrates by in situ Ag NPs incorporation into fabric matrix. Ag NPs as a coloration and antimicrobial agent were prepared in situ incorporation into fabric matrix (Cotton and Wool) by using trisodium citrate as reducing and stabilizing agent. The Ag NPs treated fabric (Cotton and Wool) showed different color because of localized surface Plasmon resonance (LSPR) property of Ag NPs. The formation of Ag NPs was confirmed by UV/Vis spectra for the supernatant solutions and The Ag NPs treated fabric (Cotton and Wool) were characterized by scanning electron microscopy (SEM) and X-ray photo electron spectroscopy (XPS). The dependence of color properties characterized by colorimetric, fastness and antibacterial properties evaluated by Escherichia coli using counting method and the reaction parameters were studied. The results indicate that, the in situ Ag NPs incorporation into fabric matrix approach can simultaneously impart colorant and antimicrobial properties into different fabric substrates. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ag%20NPs" title="Ag NPs">Ag NPs</a>, <a href="https://publications.waset.org/abstracts/search?q=coloration" title=" coloration"> coloration</a>, <a href="https://publications.waset.org/abstracts/search?q=antibacterial" title=" antibacterial"> antibacterial</a>, <a href="https://publications.waset.org/abstracts/search?q=wool" title=" wool"> wool</a>, <a href="https://publications.waset.org/abstracts/search?q=cotton%20fabric" title=" cotton fabric"> cotton fabric</a> </p> <a href="https://publications.waset.org/abstracts/11113/innovative-textile-design-using-in-situ-ag-nps-incorporation-into-natural-fabric-matrix" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11113.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">357</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">50</span> Investigation of Steady State Infiltration Rate for Different Head Condition</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nour%20Aljafari">Nour Aljafari</a>, <a href="https://publications.waset.org/abstracts/search?q=Mariam"> Mariam</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Maani"> S. Maani</a>, <a href="https://publications.waset.org/abstracts/search?q=Serter%20Atabay"> Serter Atabay</a>, <a href="https://publications.waset.org/abstracts/search?q=Tarig%20Ali"> Tarig Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Said%20Daker"> Said Daker</a>, <a href="https://publications.waset.org/abstracts/search?q=Lara%20Daher"> Lara Daher</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamad%20Bukhammas"> Hamad Bukhammas</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20Abou%20Shakra"> Mohammed Abou Shakra</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper aims at determining the soil characteristics that influence the irrigation process of green landscapes and deciding on the optimum amount of water needed for irrigation. The laboratory experiments were conducted using the constant head methodology to determine the soil infiltration rates. The steady state infiltration rate was reached after 10 minutes of infiltration at a rate of 200 mm/hr. The effects of different water heads on infiltration rates were also investigated, and the head of 11 cm was found to be the optimum head for the test. The experimental results showed consistent infiltration results for the range between 11 cm and 15 cm. The study also involved finding the initial moisture content, which ranged between 5% and 25%, and finding the organic content, which occupied 1% to 2% of the soil. These results will be later utilized, using the water balance approach, to estimate the optimum amount of water needed for irrigation for changing weather conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=infiltration%20rate" title="infiltration rate">infiltration rate</a>, <a href="https://publications.waset.org/abstracts/search?q=moisture%20content" title=" moisture content"> moisture content</a>, <a href="https://publications.waset.org/abstracts/search?q=grass%20type" title=" grass type"> grass type</a>, <a href="https://publications.waset.org/abstracts/search?q=organic%20content" title=" organic content"> organic content</a> </p> <a href="https://publications.waset.org/abstracts/52538/investigation-of-steady-state-infiltration-rate-for-different-head-condition" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52538.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">294</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">49</span> A Comparative Study of Microstructure, Thermal and Mechanical Properties of A359 Composites Reinforced with SiC, Si3N4 and AlN Particles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Essam%20Shalaby">Essam Shalaby</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexander%20Churyumov"> Alexander Churyumov</a>, <a href="https://publications.waset.org/abstracts/search?q=Malak%20Abou%20El-Khair"> Malak Abou El-Khair</a>, <a href="https://publications.waset.org/abstracts/search?q=Atef%20Daoud"> Atef Daoud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A comparative study of the thermal and mechanical behavior of squeezed A359 composites containing 5, 10 and 15 wt.% SiC, (SiC+ Si3N4) and AlN particulates was investigated. Stir followed by squeeze casting techniques are used to produce A359 composites. It was noticed that, A359/AlN composites have high thermal conductivity as compared to A359 alloy and even to A359/SiC or A359/(SiC+Si3N4) composites. Microstructures of the composites have shown homogeneous and even distribution of reinforcements within the matrix. Interfacial reactions between particles and matrix were investigated using X-ray diffraction and energy dispersive X-ray analysis. The presence of particles led not only to increase peak hardness of the composites but also to accelerate the aging kinetics. As compared with A359 matrix alloy, compression test of the composites has exhibited a significant increase in the yield and the ultimate compressive strengths with a relative reduction in the failure strain. Those light weight composites have a high potential to be used for automotive and aerospace applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=metal-matrix%20composite" title="metal-matrix composite">metal-matrix composite</a>, <a href="https://publications.waset.org/abstracts/search?q=squeeze" title=" squeeze"> squeeze</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20conductivity" title=" thermal conductivity"> thermal conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=compressive%20properties" title=" compressive properties"> compressive properties</a> </p> <a href="https://publications.waset.org/abstracts/66981/a-comparative-study-of-microstructure-thermal-and-mechanical-properties-of-a359-composites-reinforced-with-sic-si3n4-and-aln-particles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66981.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">381</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">48</span> 3D Modelling of Fluid Flow in Tunnel Kilns</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jaber%20H.%20Almutairi">Jaber H. Almutairi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hosny%20Z.%20Abou-Ziyan"> Hosny Z. Abou-Ziyan</a>, <a href="https://publications.waset.org/abstracts/search?q=Issa%20F.%20Almesri"> Issa F. Almesri</a>, <a href="https://publications.waset.org/abstracts/search?q=Mosab%20A.%20Alrahmani"> Mosab A. Alrahmani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present work investigates the behavior of fluid flow inside tunnel kilns using 3D-CFD (Computational Fluid Dynamics) simulations. The CFD simulations are carried out with the FLUENT software and validated against experimental results on fluid flow and heat transfer in tunnel kilns. A grid dependency study is conducted in the current work to improve the accuracy of the results. Three turbulence models k–ω, standard k–ε, and RNG k–ε are tested where k–ω model gives the best results in comparison with the experiment. The numerical results reveal an intriguing phenomenon where a long flow separation zone behind the setting is observed under different geometric and operation conditions. It was found that the uniformity of flow distribution can be substantially improved by rearranging the geometrical parameters of brick setting relative to kiln/setting. This improvement of flow distribution plays a critical role to enhance the quality and quantity of the production. It can be concluded that a better design and operation of tunnel kilns in terms of productivity and energy consumption can be obtained by taking into consideration the flow uniformity inside the tunnel kilns using CFD modelling. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tunnel%20kilns" title="tunnel kilns">tunnel kilns</a>, <a href="https://publications.waset.org/abstracts/search?q=flow%20separation" title=" flow separation"> flow separation</a>, <a href="https://publications.waset.org/abstracts/search?q=flow%20uniformity" title=" flow uniformity"> flow uniformity</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamics" title=" computational fluid dynamics"> computational fluid dynamics</a> </p> <a href="https://publications.waset.org/abstracts/62902/3d-modelling-of-fluid-flow-in-tunnel-kilns" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/62902.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">329</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">47</span> In vivo Spectroscopic Study on the Effects of Ionising and Non-Ionising Radiation on Some Biophysical Properties of Rat Blood </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20H.%20Allehyani">S. H. Allehyani</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20S.%20Ibrahim"> H. S. Ibrahim</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20M.%20Ali"> F. M. Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Sayd"> E. Sayd</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Abou%20Aiad"> T. Abou Aiad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study aimed to analyse the radiation risk associated with the exposure of haemoglobin (Hb) of rat red blood cells (rbcs) exposed to a 50-Hz 6-kV/m electric field, a fast neutron dose of 1 mSv, and mixed radiation from fast neutrons and an electric field distributed over a period of three weeks at a rate of 5 days/week and 8 hours/day. The dielectric measurements and the absorption spectra for the haemoglobin molecule in the frequency range of 1 kHz to 5 MHz were measured for all of the samples. The dielectric relaxation results demonstrated an increase in the dielectric increment (∆ε) for the rbcs from all of the irradiated animals, which indicates an increase in the electric dipole. Moreover, the results revealed a decrease in the relaxation time (τ) and the molecular radius (r) of the irradiated molecules, which indicates that the increase in ∆ε is mainly due to a pronounced increase in the centre of mass of the charge on the electric dipole of the Hb molecule. The results from the absorption spectra indicate that the ratio of met-haemoglobin to oxy-haemoglobin is altered by irradiation. Moreover, the results from the delayed effect studies show that the structure and function of the newly generated Hb molecules are altered and dissimilar to that of healthy Hb. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rat%20red%20blood%20cell%20haemoglobin" title="rat red blood cell haemoglobin">rat red blood cell haemoglobin</a>, <a href="https://publications.waset.org/abstracts/search?q=dielectric%20properties" title=" dielectric properties"> dielectric properties</a>, <a href="https://publications.waset.org/abstracts/search?q=absorption%20spectra" title=" absorption spectra"> absorption spectra</a>, <a href="https://publications.waset.org/abstracts/search?q=biochemical%20analysis" title=" biochemical analysis"> biochemical analysis</a> </p> <a href="https://publications.waset.org/abstracts/16865/in-vivo-spectroscopic-study-on-the-effects-of-ionising-and-non-ionising-radiation-on-some-biophysical-properties-of-rat-blood" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16865.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">367</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">46</span> Dual Reconfigurable Antenna Using Capacitive Coupling Slot and Parasitic Square Ring</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Abou%20Al-alaa">M. Abou Al-alaa</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20A.%20Elsadek"> H. A. Elsadek</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20A.%20Abdallah"> E. A. Abdallah</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20A.%20Hashish"> E. A. Hashish</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A square patch antenna with both frequency and polarization reconfigurability is presented. The antenna consists of a square patch with coplanar feed on the ground plane. On the patch side, there is a parasitic square ring that is responsible for changing the antenna polarization. On the ground plane, there is a rectangular slot. By changing of length of this slot, the antenna resonance frequency can be changed. The antenna operates at 1.57 and 2.45 GHz that used in GPS and Bluetooth applications, respectively. The length of the slot in the proposed antenna is 40 mm, and the antenna operates at the lower frequency (1.57 GHz). By using switches in the ground plane the slot length can be adjust to 24 mm, so the antenna operates at upper frequency (2.45 GHz). Two switches are mounted on the parasitic ring at optimized positions. By switching between the different states of these two switches, the proposed antenna operates with linear polarization (LP) and circular polarization (CP) at each operating frequency. The antenna gain at 1.57 and 2.45 GHz are 5.9 and 7.64 dBi, respectively. The antenna is analyzed using the CST Microwave Studio. The proposed antenna was fabricated and measured. Results comparison shows good agreement. The antenna has applications in several wireless communication systems. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=microstrip%20patch%20antenna" title="microstrip patch antenna">microstrip patch antenna</a>, <a href="https://publications.waset.org/abstracts/search?q=reconfigurable%20antenna" title=" reconfigurable antenna"> reconfigurable antenna</a>, <a href="https://publications.waset.org/abstracts/search?q=frequency%20reconfigurability" title=" frequency reconfigurability"> frequency reconfigurability</a>, <a href="https://publications.waset.org/abstracts/search?q=polarization%20reconfigurability" title=" polarization reconfigurability"> polarization reconfigurability</a>, <a href="https://publications.waset.org/abstracts/search?q=parasitic%20square%20ring" title=" parasitic square ring"> parasitic square ring</a>, <a href="https://publications.waset.org/abstracts/search?q=linear%20polarization" title=" linear polarization"> linear polarization</a>, <a href="https://publications.waset.org/abstracts/search?q=circular%20polarization" title=" circular polarization "> circular polarization </a> </p> <a href="https://publications.waset.org/abstracts/5893/dual-reconfigurable-antenna-using-capacitive-coupling-slot-and-parasitic-square-ring" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5893.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">533</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">45</span> Knowledge Management and Tourism: An Exploratory Study Applied to Travel Agents in Egypt</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Soliman">Mohammad Soliman</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20A.%20Abou-Shouk"> Mohamed A. Abou-Shouk</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Knowledge management focuses on the development, storage, retrieval, and dissemination of information and expertise. It has become an important tool to improve performance in tourism enterprises. This includes improving decision-making, developing customer services, and increasing sales and profits. Knowledge management adoption depends on human, organizational and technological factors. This study aims to explore the concept of knowledge management in travel agents in Egypt. It explores the requirements of adoption and its impact on performance in these agencies. The study targets Category A travel agents in Egypt. The population of the study encompasses Category A travel agents having online presence. An online questionnaire is used to collect data from managers of travel agents. This study is useful for travel agents who are in urgent need to restructure their intermediary role and support their survival in the global travel market. The study sheds light on the requirements of adoption and the expected impact on performance. This could help travel agents identify their situation and the determine the extent to which they are ready to adopt knowledge management. This study is contributing to knowledge by providing insights from the tourism sector in a developing country where the concept of knowledge management is still in its infancy stages. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=knowledge%20management" title="knowledge management">knowledge management</a>, <a href="https://publications.waset.org/abstracts/search?q=knowledge%20management%20adoption" title=" knowledge management adoption"> knowledge management adoption</a>, <a href="https://publications.waset.org/abstracts/search?q=performance" title=" performance"> performance</a>, <a href="https://publications.waset.org/abstracts/search?q=travel%20agents" title=" travel agents"> travel agents</a> </p> <a href="https://publications.waset.org/abstracts/36812/knowledge-management-and-tourism-an-exploratory-study-applied-to-travel-agents-in-egypt" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36812.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">397</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=A.%20Abou%20El-Kheir&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=A.%20Abou%20El-Kheir&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=A.%20Abou%20El-Kheir&page=2" rel="next">&rsaquo;</a></li> </ul> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> 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