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Abdel Rehim</title> <meta name="description" content="Search results for: Zeinab Syed Abdel Rehim"> <meta name="keywords" content="Zeinab Syed Abdel Rehim"> <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 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action="https://publications.waset.org/abstracts/search"> <div 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="Zeinab Syed Abdel Rehim"> <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> 550</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Zeinab Syed Abdel Rehim</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">550</span> Enhancement Performance of Desalination System Using Humidification and Dehumidification Processes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeinab%20Syed%20Abdel%20Rehim">Zeinab Syed Abdel Rehim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Water shortage is considered as one of the huge problems the world encounter now. Water desalination is considered as one of the more suitable methods governments can use to substitute the increased need for potable water. The humidification-dehumidification process for water desalination is viewed as a promising technique for small capacity production plants. The process has several attraction features which include the use of sustainable energy sources, low technology, and low-temperature dehumidification. A pilot experimental set-up plant was constructed with the conventional HVAC components such as air blower that supplies air to an air duct inside which air preheater, steam injector and cooling coil of a small refrigeration unit are placed. The present work evaluates the characteristics of humidification-dehumidification process for water desalination as a function of air flow rate, total power input and air inlet temperature in order to study the optimum conditions required to produce distilled water. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=condensation" title="condensation">condensation</a>, <a href="https://publications.waset.org/abstracts/search?q=dehumidification" title=" dehumidification"> dehumidification</a>, <a href="https://publications.waset.org/abstracts/search?q=evaporation" title=" evaporation"> evaporation</a>, <a href="https://publications.waset.org/abstracts/search?q=humidification" title=" humidification"> humidification</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20desalination" title=" water desalination"> water desalination</a> </p> <a href="https://publications.waset.org/abstracts/48084/enhancement-performance-of-desalination-system-using-humidification-and-dehumidification-processes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48084.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">243</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">549</span> Numerical Study of Fluid Flow and Heat Transfer in the Spongy-Porous Media</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeinab%20Sayed%20Abdel%20Rehim">Zeinab Sayed Abdel Rehim</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Ziada"> M. A. Ziada</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Salwa%20El-Deeb"> H. Salwa El-Deeb </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Numerical study of fluid flow, heat transfer and thermal energy storing or released in/from spongy-porous media to predict the thermal performance and characteristics of the porous media as packed bed system is presented in this work. This system is cylindrical channel filled with porous media (carbon foam). The system consists of working fluid (air) and spongy-porous medium; they act as the heat exchanger (heating or cooling modes) where thermal interaction occurs between the working fluid and the porous medium. The spongy-porous media are defined by the different type of porous medium employed in the storing or cooling modes. Two different porous media are considered in this study: Carbon foam, and Silicon rubber. The flow of the working fluid (air) is one dimensional in the axial direction from the top to downward and steady state conditions. The numerical results of transient temperature distribution for both working fluid and the spongy-porous medium phases and the amount of stored/realized heat inside/from the porous medium for each case with respect to the operating parameters and the spongy-porous media characteristics are illustrated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fluid%20flow" title="fluid flow">fluid flow</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title=" heat transfer"> heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20analysis" title=" numerical analysis"> numerical analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=spongy-porous%20media" title=" spongy-porous media"> spongy-porous media</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20performance" title=" thermal performance"> thermal performance</a>, <a href="https://publications.waset.org/abstracts/search?q=transient%20conditions" title=" transient conditions"> transient conditions</a> </p> <a href="https://publications.waset.org/abstracts/30266/numerical-study-of-fluid-flow-and-heat-transfer-in-the-spongy-porous-media" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30266.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">547</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">548</span> Electrical Investigations of Polyaniline/Graphitic Carbon Nitride Composites Using Broadband Dielectric Spectroscopy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Moussa">M. A. Moussa</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20H.%20Abdel%20Rehim"> M. H. Abdel Rehim</a>, <a href="https://publications.waset.org/abstracts/search?q=G.M.%20Turky"> G.M. Turky</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Polyaniline composites with carbon nitride, to overcome compatibility restriction with graphene, were prepared with the solution method. FTIR and Uv-vis spectra were used for structural conformation. While XRD and XPS confirmed the structures in addition to estimation of nitrogen atom surroundings, the pore sizes and the active surface area were determined from BET adsorption isotherm. The electrical and dielectric parameters were measured and calculated with BDS . <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nitride" title="carbon nitride">carbon nitride</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20relaxation" title=" dynamic relaxation"> dynamic relaxation</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20conductivity" title=" electrical conductivity"> electrical conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=polyaniline" title=" polyaniline"> polyaniline</a> </p> <a href="https://publications.waset.org/abstracts/135615/electrical-investigations-of-polyanilinegraphitic-carbon-nitride-composites-using-broadband-dielectric-spectroscopy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/135615.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">142</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">547</span> Estimation and Utilization of Landfill Gas from Egyptian Municipal Waste: A Case Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20A.%20Hashim%20Habib">Ali A. Hashim Habib</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20A.%20Abdel-Rehim"> Ahmed A. Abdel-Rehim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Assuredly, massive amounts of wastes that are not utilized and dumped in uncontrolled dumpsites will be one of the major sources of diseases, fires, and emissions. With easy steps and minimum effort, energy can be produced from these gases. The present work introduces an experimental and theoretical analysis to estimate the amount of landfill gas and the corresponding energy which can be produced based on actual Egyptian municipal wastes composition. Two models were utilized and compared, EPA (Environmental Protection Agency) model and CDM (Clean Development Mechanisms) model to estimate methane generation rates and total CH4 emissions based on a particular landfill. The results showed that for every ton of municipal waste, 140 m3 of landfill gas can be produced. About 800 kW of electricity for a minimum of 24 years can be generated form one million ton of municipal waste. A total amount of 549,025 ton of carbon emission can be avoided during these 24 years. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=energy%20from%20landfill%20gases" title="energy from landfill gases">energy from landfill gases</a>, <a href="https://publications.waset.org/abstracts/search?q=landfill%20biogas" title=" landfill biogas"> landfill biogas</a>, <a href="https://publications.waset.org/abstracts/search?q=methane%20emission" title=" methane emission"> methane emission</a>, <a href="https://publications.waset.org/abstracts/search?q=municipal%20solid%20waste" title=" municipal solid waste"> municipal solid waste</a>, <a href="https://publications.waset.org/abstracts/search?q=renewable%20energy%20sources" title=" renewable energy sources"> renewable energy sources</a> </p> <a href="https://publications.waset.org/abstracts/57208/estimation-and-utilization-of-landfill-gas-from-egyptian-municipal-waste-a-case-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57208.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">225</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">546</span> Hepatitis B Virus Infection Among Egyptian Children Vaccinated during Infancy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Iman%20I.%20Salama">Iman I. Salama</a>, <a href="https://publications.waset.org/abstracts/search?q=Samia%20M.%20Sami"> Samia M. Sami</a>, <a href="https://publications.waset.org/abstracts/search?q=Somaia%20I.%20Salama"> Somaia I. Salama</a>, <a href="https://publications.waset.org/abstracts/search?q=Zeinab%20N.%20Said"> Zeinab N. Said</a>, <a href="https://publications.waset.org/abstracts/search?q=Thanaa%20M.%20Rabah"> Thanaa M. Rabah</a>, <a href="https://publications.waset.org/abstracts/search?q=Aida%20M.%20Abdel-Mohsin"> Aida M. Abdel-Mohsin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This is a national community-based project to evaluate the effectiveness of HBV vaccination program in prevention of infection. HBV markers were tested in the sera of 3600 vaccinated children. Infected children were followed up for 1 year. Prevalence of HBV infection was 0.39 % (0.28% positive for anti-HBc, 0.03% positive for HBsAg and 0.08% positive for both). One year later, 50% of positive anti-HBc children turned negative with sustained positivity for positive HBsAg cases. HBV infection was significantly higher at age above 9 years (0.6%) compared to 0.2% at age 3-9 years and 0% at younger age (P < 0.05). Logistic analysis revealed that predictors for HBV infection were history of blood transfusion, regular medical injection, and family history of either HBV infection or drug abuse (adjusted odds ratios 6.2, 5.6, 7.6 & 19.1 respectively). HBV vaccination program produced adequate protection. Adherence to infection control measures and safe blood transfusion are recommended. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=HBV%20infection" title="HBV infection">HBV infection</a>, <a href="https://publications.waset.org/abstracts/search?q=HBV%20vaccine" title=" HBV vaccine"> HBV vaccine</a>, <a href="https://publications.waset.org/abstracts/search?q=children" title=" children"> children</a>, <a href="https://publications.waset.org/abstracts/search?q=Egypt" title=" Egypt"> Egypt</a> </p> <a href="https://publications.waset.org/abstracts/2352/hepatitis-b-virus-infection-among-egyptian-children-vaccinated-during-infancy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2352.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">445</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">545</span> Active Food Packaging Films Based on Functionalized Graphene/Polymer Composites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Ghanem">Ahmad Ghanem</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamad%20Yasin"> Mohamad Yasin</a>, <a href="https://publications.waset.org/abstracts/search?q=Mona%20Abdel%20Rehim"> Mona Abdel Rehim</a>, <a href="https://publications.waset.org/abstracts/search?q=Fabrice%20Gouanve"> Fabrice Gouanve</a>, <a href="https://publications.waset.org/abstracts/search?q=Eliane%20Espuche"> Eliane Espuche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Biodegradable polymers are of great interest, especially for biomedical and packaging applications. Current research efforts are focused on the development of biopolymers with the purpose of reducing the plastic pollution induced by the widely used in biodegradable polyolefins. The main challenge is focused on the elaboration of biopolymers having properties competitive to those of polyolefins. On the other hand, graphene oxide (GO), a graphene derivative, is characterized by the presence of several functional groups on the surface such as carboxylic, hydroxyl and epoxide. This feature enables modification of GO surface with different modifiers to obtain versatile surface properties and overcome the problem of graphene sheets aggregations during inclusion in a polymer matrix. In this context, poly (butylene succinate) (PBS) as promising biopolyester is modified through blending with different ratios of functionalized (GO) to improve its barrier properties. Modification of GO has been carried out using different hyperbranched polymeric structures in order to increase miscibility of the nanosheets in the hosting polymeric matrix. Films have been prepared from the modified PBS and their mechanical, thermal and gas barrier properties were investigated. The results reveal enhancement in the thermal and mechanical properties beside observed improvement of the barrier properties for the films prepared from the modified PBS. This improvement is related to the strong dependence on tortuosity effects of dispersion, exfoliation levels of fillers into the polymer matrix and interactions between the fillers and the polymer matrix. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gas%20barrier%20properties" title="gas barrier properties">gas barrier properties</a>, <a href="https://publications.waset.org/abstracts/search?q=graphene%20oxide" title=" graphene oxide"> graphene oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=food%20packaging" title=" food packaging"> food packaging</a>, <a href="https://publications.waset.org/abstracts/search?q=transport%20properties" title=" transport properties"> transport properties</a> </p> <a href="https://publications.waset.org/abstracts/98378/active-food-packaging-films-based-on-functionalized-graphenepolymer-composites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98378.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">235</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">544</span> Finite Element Method for Solving the Generalized RLW Equation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdel-Maksoud%20Abdel-Kader%20Soliman">Abdel-Maksoud Abdel-Kader Soliman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The General Regularized Long Wave (GRLW) equation is solved numerically by giving a new algorithm based on collocation method using quartic B-splines at the mid-knot points as element shape. Also, we use the Fourth Runge-Kutta method for solving the system of first order ordinary differential equations instead of finite difference method. Our test problems, including the migration and interaction of solitary waves, are used to validate the algorithm which is found to be accurate and efficient. The three invariants of the motion are evaluated to determine the conservation properties of the algorithm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=generalized%20RLW%20equation" title="generalized RLW equation">generalized RLW equation</a>, <a href="https://publications.waset.org/abstracts/search?q=solitons" title=" solitons"> solitons</a>, <a href="https://publications.waset.org/abstracts/search?q=quartic%20b-spline" title=" quartic b-spline"> quartic b-spline</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20partial%20differential%20equations" title=" nonlinear partial differential equations"> nonlinear partial differential equations</a>, <a href="https://publications.waset.org/abstracts/search?q=difference%20equations" title=" difference equations"> difference equations</a> </p> <a href="https://publications.waset.org/abstracts/9023/finite-element-method-for-solving-the-generalized-rlw-equation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9023.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">543</span> Application of Optimization Techniques in Overcurrent Relay Coordination: A Review</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Syed%20Auon%20Raza">Syed Auon Raza</a>, <a href="https://publications.waset.org/abstracts/search?q=Tahir%20Mahmood"> Tahir Mahmood</a>, <a href="https://publications.waset.org/abstracts/search?q=Syed%20Basit%20Ali%20Bukhari"> Syed Basit Ali Bukhari </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In power system properly coordinated protection scheme is designed to make sure that only the faulty part of the system will be isolated when abnormal operating condition of the system will reach. The complexity of the system as well as the increased user demand and the deregulated environment enforce the utilities to improve system reliability by using a properly coordinated protection scheme. This paper presents overview of over current relay coordination techniques. Different techniques such as Deterministic Techniques, Meta Heuristic Optimization techniques, Hybrid Optimization Techniques, and Trial and Error Optimization Techniques have been reviewed in terms of method of their implementation, operation modes, nature of distribution system, and finally their advantages as well as the disadvantages. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=distribution%20system" title="distribution system">distribution system</a>, <a href="https://publications.waset.org/abstracts/search?q=relay%20coordination" title=" relay coordination"> relay coordination</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=Plug%20Setting%20Multiplier%20%28PSM%29" title=" Plug Setting Multiplier (PSM)"> Plug Setting Multiplier (PSM)</a> </p> <a href="https://publications.waset.org/abstracts/3872/application-of-optimization-techniques-in-overcurrent-relay-coordination-a-review" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3872.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">399</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">542</span> Chemical Analysis, Antioxidant Activity and Antimicrobial Activity of Isolated Compounds and Essential Oil from Callistemon citrinus Leaf</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Manal%20M.%20Hamed">Manal M. Hamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Mosad%20A.%20Ghareeb"> Mosad A. Ghareeb</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdel-Aleem%20H.%20Abdel-Aleem"> Abdel-Aleem H. Abdel-Aleem</a>, <a href="https://publications.waset.org/abstracts/search?q=Amal%20M.%20Saad"> Amal M. Saad</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=Asmaa%20H.%20Hadad"> Asmaa H. Hadad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Natural products derived from medicinal plants provide unlimited opportunities for a new medication leads because of the unmatched accessibility of chemical variation. Six compounds were isolated from the n-butanol extract of Callistemon citrinus (Family Myrtaceae), they were identified as; nepetolide (1), callislignan A (2), 6,8-dimethoxy-4,5-dimethyl-3-methyleneisochroman-1-one (3), 3-methyl-7-O-benzoyl-β-D-glucopyranoside (4), 5, 7, 3', 5'-tetrahydroxy-6, 8-di-C-methyl flavanone (5), and (2R,3R,4S,5S)-2,4-bis(4-hydroxyphenyl)-3,5-dihydroxy-tetrahydropyran (6). The isolated compounds were evaluated as antioxidant and antimicrobial agents. The antioxidant activities of the compounds were determined using DPPH-radical scavenging and total antioxidant capacity (TAC) assays. The results indicated that compound (5) was most active in its capacity to scavenge free radicals in the DPPH assay [SC50 value, 4.65 ± 0.74μg/mL] compared to the standard ascorbic acid and exhibited the highest activity in the TAC assay (610.45 ± 1.67mg AAE/g compound). The pure isolates were tested for their antimicrobial activity against four pathogenic microbial strains including Staphylococcus aureus, Methicillin-resistant Staphylococcus aureus (MRSA), Pseudomonas aeruginosa and Candida albicans. Also, the GC/MS analysis of its leaves essential oil presented nine identified compounds representing 91% of the total oil constituents. The outcomes got from this study give a reasonable justification for the medicinal uses of Callistemon citrinus plant. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Callistemon%20citrinus" title="Callistemon citrinus">Callistemon citrinus</a>, <a href="https://publications.waset.org/abstracts/search?q=flavanone" title=" flavanone"> flavanone</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=antimicrobial%20activity" title=" antimicrobial activity"> antimicrobial activity</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=Myrtaceae" title=" Myrtaceae"> Myrtaceae</a> </p> <a href="https://publications.waset.org/abstracts/74052/chemical-analysis-antioxidant-activity-and-antimicrobial-activity-of-isolated-compounds-and-essential-oil-from-callistemon-citrinus-leaf" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74052.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">295</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">541</span> History on the Screen: Nasser and the Biographical Film in Egyptian Cinema</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Omar%20Khalifah">Omar Khalifah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The emergence of Muhammad Fadel’s 1996 film ‘Nasser 56’ ushered in a new era in Egyptian cinema. Not only was it the first biographical film of late Egyptian president Gamal ‘Abdel Nasser (1918-1970); it also broke a long-accepted taboo against cinematic depiction of modern political leaders. Passionately received by Egyptians and Arabs throughout the world, the success of ‘Nasser 56’ empowered other filmmakers to follow Fadel’s suit. Interestingly, the three biographical films that followed had, completely or partially, a Nasser dimension. In addition to another biographical film of Nasser, Anwar al-Qawadri’s ‘Gamal ‘Abdel Nasser’ (1999); Muhammad Khan’s ‘Ayyam al-Sadat (Days of Sadat)’ (2001), and Sherif Arafa’s ‘Halim (Halim)’ (2006) portray, as the titles clearly suggest, two significant figures whose lives thoroughly intersected with Nasser’s - Nasser’s successor Anwar al-Sadat and the legendary singer Abdel Halim Hafiz. Expectedly, therefore, Nasser himself is abundantly referenced in those films, albeit differently. This paper seeks to examine the ways in which Egyptian filmmakers impersonate Nasser on the screen. Starting with scholarly definitions of the biopic, the paper will first ponder the reasons that have made the biopic an unattractive genre to Egyptian filmmakers. It will then argue that the popularity of Nasser and his wide appeal to the public has transformed the status of the biopic genre in Egyptian cinema. However, the impersonation of Nasser in the four films above proved a daunting mission to filmmakers. As this paper will show, unless he is the main character, the reenactment of Nasser in films will constantly pose dilemmas to filmmakers, a few of which will be discussed in this paper. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Zaki" title="Ahmad Zaki">Ahmad Zaki</a>, <a href="https://publications.waset.org/abstracts/search?q=bio-pictures" title=" bio-pictures"> bio-pictures</a>, <a href="https://publications.waset.org/abstracts/search?q=Egyptian%20cinema" title=" Egyptian cinema"> Egyptian cinema</a>, <a href="https://publications.waset.org/abstracts/search?q=Nasser" title=" Nasser"> Nasser</a>, <a href="https://publications.waset.org/abstracts/search?q=Nasser%2056" title=" Nasser 56"> Nasser 56</a> </p> <a href="https://publications.waset.org/abstracts/38660/history-on-the-screen-nasser-and-the-biographical-film-in-egyptian-cinema" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/38660.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">540</span> Study the Effect of Dermal Application of Stone Hair Dye on Experimental Animals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hatem%20Abdel%20Moniem%20Ahmed">Hatem Abdel Moniem Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Ragaa%20Mohamed%20Abdel%20Maaboud"> Ragaa Mohamed Abdel Maaboud</a>, <a href="https://publications.waset.org/abstracts/search?q=Heba%20A.%20Mubarak"> Heba A. Mubarak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A commercially available Stone Hair Dye (SHD) was spread in Upper Egypt and used for dying woman's hair. Paraphenyl-diamine (PPD) is the main component of SHD and reported as a toxic substance. This work aims to study the systemic effects induced in experimental animals as a result of dermal application of SHD. 21 rats were divided into three groups, and doses of SHD and PPD were applied according to body weight (25 mg/100 g body weight) for 90 days. The results revealed that insignificant decrease in RBC count and Hb level, but there were significant increases in the WBC count, AST, ALT, GPT, and total protein while creatinine level was insignificantly increased. Hepatocytes showed a lot of degenerative changes in the form of vacuolated cytoplasm and irregular deeply stained nuclei with vascular congestion and lymphocytic infiltration, while renal affection indicated the occurrence of atrophy of glomerular capillaries, hyperplasia, and widening of bowman space. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PPD" title="PPD">PPD</a>, <a href="https://publications.waset.org/abstracts/search?q=SHD" title=" SHD"> SHD</a>, <a href="https://publications.waset.org/abstracts/search?q=rats%20and%20histology" title=" rats and histology"> rats and histology</a>, <a href="https://publications.waset.org/abstracts/search?q=biochemistry%20and%20hematology" title=" biochemistry and hematology"> biochemistry and hematology</a> </p> <a href="https://publications.waset.org/abstracts/18075/study-the-effect-of-dermal-application-of-stone-hair-dye-on-experimental-animals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18075.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">452</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">539</span> Islam and Democracy: A Paradoxical Study of Syed Maududi and Javed Ghamidi</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Waseem%20Makai">Waseem Makai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The term ‘political Islam’ now seem to have gained the centre stage in every discourse pertaining to Islamic legitimacy and compatibility in modern civilisations. A never ceasing tradition of the philosophy of caliphate that has kept overriding the options of any alternate political institution in the Muslim world still permeates a huge faction of believers. Fully accustomed with the proliferation of changes and developments in individual, social and natural dispositions of the world, Islamic theologians retaliated to this flux through both conventional and modernist approaches. The so-called conventional approach was quintessential of the interpretations put forth by Syed Maududi, with new comprehensive, academic and powerful vigour, as never seen before. He generated the avant-garde scholarship which would bear testimony to his statements, made to uphold the political institution of Islam as supreme and noble. However, it was not his trait to challenge the established views but to codify them in such a bracket which a man of the 20th century would find captivating to his heart and satisfactory to his rationale. The delicate microcosms like selection of a caliph, implementation of Islamic commandments (Sharia), interest free banking sectors, imposing tax (Jazyah) on non-believers, waging the holy crusade (Jihad) for the expansion of Islamic boundaries, stoning for committing adulteration and capital punishment for apostates were all there in his scholarship which he spent whole of his life defending in the best possible manner. What and where did he went wrong with all this, was supposedly to be notified later, by his once been disciple, Javed Ahmad Ghamidi. Ghamidi is being accused of struggling between Scylla and Charybdis as he tries to remain steadfast to his basic Islamic tenets while modernising their interpretations to bring them in harmony with the Western ideals of democracy and liberty. His blatant acknowledgement of putting democracy at a high pedestal, calling the implementation of Sharia a non-mandatory task and denial to bracket people in the categories of Zimmi and Kaafir fully vindicates his stance against conventional narratives like that of Syed Maududi. Ghamidi goes to the extent of attributing current forms of radicalism and extremism, as exemplified in the operations of organisations like ISIS in Iraq and Syria and Tehreek-e-Taliban in Pakistan, to such a version of political Islam as upheld not only by Syed Maududi but by other prominent theologians like Ibn-Timyah, Syed Qutub and Dr. Israr Ahmad also. Ghamidi is wretched, in a way that his allegedly insubstantial claims gained him enough hostilities to leave his homeland when two of his close allies were brutally murdered. Syed Maududi and Javed Ghamidi, both stand poles apart in their understanding of Islam and its political domain. Who has the appropriate methodology, scholarship and execution in his mode of comprehension, is an intriguing task, worth carrying out in detail. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=caliphate" title="caliphate">caliphate</a>, <a href="https://publications.waset.org/abstracts/search?q=democracy" title=" democracy"> democracy</a>, <a href="https://publications.waset.org/abstracts/search?q=ghamidi" title=" ghamidi"> ghamidi</a>, <a href="https://publications.waset.org/abstracts/search?q=maududi" title=" maududi"> maududi</a> </p> <a href="https://publications.waset.org/abstracts/86830/islam-and-democracy-a-paradoxical-study-of-syed-maududi-and-javed-ghamidi" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/86830.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">200</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">538</span> Reliability of Slender Reinforced Concrete Columns: Part 1</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Metwally%20Abdel%20Aziz%20Ahmed">Metwally Abdel Aziz Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Shaban%20Abdel%20Hay%20Gabr"> Ahmed Shaban Abdel Hay Gabr</a>, <a href="https://publications.waset.org/abstracts/search?q=Inas%20Mohamed%20Saleh"> Inas Mohamed Saleh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main objective of structural design is to ensure safety and functional performance requirements of a structural system for its target reliability levels. In this study, the reliability index for the reinforcement concrete slender columns with rectangular cross section is studied. The variable parameters studied include the loads, the concrete compressive strength, the steel yield strength, the dimensions of concrete cross-section, the reinforcement ratio, and the location of steel placement. Risk analysis program was used to perform the analytical study. The effect of load eccentricity on the reliability index of reinforced concrete slender column was studied and presented. The results of this study indicate that the good quality control improve the performance of slender reinforced columns through increasing the reliability index β. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=reliability" title="reliability">reliability</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforced%20concrete" title=" reinforced concrete"> reinforced concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=safety" title=" safety"> safety</a>, <a href="https://publications.waset.org/abstracts/search?q=slender%20column" title=" slender column"> slender column</a> </p> <a href="https://publications.waset.org/abstracts/53342/reliability-of-slender-reinforced-concrete-columns-part-1" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53342.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">454</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">537</span> Kinematic Behavior of Geogrid Reinforcements during Earthquakes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Hosny%20Abdel-Rahman">Ahmed Hosny Abdel-Rahman</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Abdel-Moneim"> Mohamed Abdel-Moneim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Reinforced earth structures are generally subjected to cyclic loading generated from earthquakes. This paper presents a summary of the results and analyses of a testing program carried out in a large-scale multi-function geosynthetic testing apparatus that accommodates soil samples up to 1.0 m3. This apparatus performs different shear and pullout tests under both static and cyclic loading. The testing program was carried out to investigate the controlling factors affecting soil/geogrid interaction under cyclic loading. The extensibility of the geogrids, the applied normal stresses, the characteristics of the cyclic loading (frequency, and amplitude), and initial static load within the geogrid sheet were considered in the testing program. Based on the findings of the testing program, the effect of these parameters on the pullout resistance of geogrids, as well as the displacement mobility under cyclic loading were evaluated. Conclusions and recommendations for the design of reinforced earth walls under cyclic loading are presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=geogrid" title="geogrid">geogrid</a>, <a href="https://publications.waset.org/abstracts/search?q=soil" title=" soil"> soil</a>, <a href="https://publications.waset.org/abstracts/search?q=interface" title=" interface"> interface</a>, <a href="https://publications.waset.org/abstracts/search?q=cyclic%20loading" title=" cyclic loading"> cyclic loading</a>, <a href="https://publications.waset.org/abstracts/search?q=pullout" title=" pullout"> pullout</a>, <a href="https://publications.waset.org/abstracts/search?q=large%20scale%20testing" title=" large scale testing"> large scale testing</a> </p> <a href="https://publications.waset.org/abstracts/30799/kinematic-behavior-of-geogrid-reinforcements-during-earthquakes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30799.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">622</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">536</span> Dye Removal from Aqueous Solution by Regenerated Spent Bleaching Earth</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20I.%20Shehab">Ahmed I. Shehab</a>, <a href="https://publications.waset.org/abstracts/search?q=Sabah%20M.%20Abdel%20Basir"> Sabah M. Abdel Basir</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Abdel%20Khalek"> M. A. Abdel Khalek</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20H.%20Soliman"> M. H. Soliman</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20Elgemeie"> G. Elgemeie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Spent bleaching earth (SBE) recycling and utilization as an adsorbent to eliminate dyes from aqueous solution was studied. Organic solvents and subsequent thermal treatment were carried out to recover and reactivate the SBE. The effect of pH, temperature, dye’s initial concentration, and contact time on the dye removal using recycled spent bleaching earth (RSBE) was investigated. Recycled SBE showed better removal affinity of cationic than anionic dyes. The maximum removal was achieved at pH 2 and 8 for anionic and cationic dyes, respectively. Kinetic data matched with the pseudo second-order model. The adsorption phenomenon governing this process was identified by the Langmuir and Freundlich isotherms for anionic dye while Freundlich model represented the sorption process for cationic dye. The changes of Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°) were computed and compared through thermodynamic study for both dyes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Spent%20bleaching%20earth" title="Spent bleaching earth">Spent bleaching earth</a>, <a href="https://publications.waset.org/abstracts/search?q=reactivation" title=" reactivation"> reactivation</a>, <a href="https://publications.waset.org/abstracts/search?q=regeneration" title=" regeneration"> regeneration</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20treatment" title=" thermal treatment"> thermal treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=dye%20removal" title=" dye removal"> dye removal</a>, <a href="https://publications.waset.org/abstracts/search?q=thermodynamic" title=" thermodynamic"> thermodynamic</a> </p> <a href="https://publications.waset.org/abstracts/108660/dye-removal-from-aqueous-solution-by-regenerated-spent-bleaching-earth" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/108660.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">183</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">535</span> Enhancing Educational Environments: Maximizing School Playground Potential Through Biophilic Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Esraa%20Abdel-Salam">Esraa Abdel-Salam</a>, <a href="https://publications.waset.org/abstracts/search?q=Tarek%20Farghaly"> Tarek Farghaly</a>, <a href="https://publications.waset.org/abstracts/search?q=Hassan%20Abdel-Salam"> Hassan Abdel-Salam</a>, <a href="https://publications.waset.org/abstracts/search?q=Asmaa%20Hasan"> Asmaa Hasan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Increasing evidence indicates that the growing disconnect between humans and the natural environment, propelled by technological advancements, has had adverse impacts on human health and overall well-being. Therefore, bridging the gap between humans and nature, the biophilia hypothesis emerges as a relatively theoretical and less comprehensively studied concept, though it has great potential for alternative design ideas. The research aims to enhance school playgrounds with biophilic design, positively impacting children's mental and physical well-being. This paper investigates the integration of biophilic design in school playgrounds and its influence on the well-being of children. It involves an analysis of three playgrounds in Alexandria, Egypt, each exhibiting varying degrees of biophilic design principles. The study investigates how these design elements enhance students' experiences by improving their surrounding environments. The research aims to develop a design framework and recommendations for creating or modifying playgrounds to enhance the physical and mental well-being of children. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biophilic%20design" title="biophilic design">biophilic design</a>, <a href="https://publications.waset.org/abstracts/search?q=physical%20health" title=" physical health"> physical health</a>, <a href="https://publications.waset.org/abstracts/search?q=mental%20well-being" title=" mental well-being"> mental well-being</a>, <a href="https://publications.waset.org/abstracts/search?q=children%E2%80%99s%20development" title=" children’s development"> children’s development</a>, <a href="https://publications.waset.org/abstracts/search?q=school%20playground" title=" school playground"> school playground</a> </p> <a href="https://publications.waset.org/abstracts/192052/enhancing-educational-environments-maximizing-school-playground-potential-through-biophilic-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192052.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">25</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">534</span> Transforming Butterworth Low Pass Filter into Microstrip Line Form at LC-Band Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Liew%20Hui%20Fang">Liew Hui Fang</a>, <a href="https://publications.waset.org/abstracts/search?q=Syed%20Idris%20Syed%20Hassan"> Syed Idris Syed Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohd%20Fareq%20Abd.%20Malek"> Mohd Fareq Abd. Malek</a>, <a href="https://publications.waset.org/abstracts/search?q=Yufridin%20Wahab"> Yufridin Wahab</a>, <a href="https://publications.waset.org/abstracts/search?q=Norshafinash%20Saudin"> Norshafinash Saudin </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper implementation new approach method applied into transforming lumped element circuit into microstrip line form for Butterworth low pass filter which is operating at LC band. The filter’s lumped element circuits and microstrip line form were first designed and simulated using Advanced Design Software (ADS) to obtain the best filter characteristic based on S-parameter and implemented on FR4 substrate for order N=3,4,5,6,7,8 and 9. The importance of a new approach of transforming method as a correction factor has been considered into designed microstrip line. From ADS simulation results proved that the response of microstrip line circuit of Butterworth low pass filter with fringing correction factor has an excellent agreement with its lumped circuit. This shows that the new approach of transforming lumped element circuit into microstrip line is able to solve the conventional design of complexity size of circuit of Butterworth low pass filter (LPF) into microstrip line. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Butterworth%20low%20pass%20filter" title="Butterworth low pass filter">Butterworth low pass filter</a>, <a href="https://publications.waset.org/abstracts/search?q=number%20of%20order" title=" number of order"> number of order</a>, <a href="https://publications.waset.org/abstracts/search?q=microstrip%20line" title=" microstrip line"> microstrip line</a>, <a href="https://publications.waset.org/abstracts/search?q=microwave%20filter" title=" microwave filter"> microwave filter</a>, <a href="https://publications.waset.org/abstracts/search?q=maximally%20flat" title=" maximally flat"> maximally flat</a> </p> <a href="https://publications.waset.org/abstracts/2002/transforming-butterworth-low-pass-filter-into-microstrip-line-form-at-lc-band-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2002.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">334</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">533</span> Social Media Marketing Efforts to Influence Brand Equity and Consumer Behavior: The Case of Luxury Fashion Brands in Pakistan</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Syed%20Rashid%20Hussain%20Shah">Syed Rashid Hussain Shah</a>, <a href="https://publications.waset.org/abstracts/search?q=Sumera%20Syed"> Sumera Syed</a>, <a href="https://publications.waset.org/abstracts/search?q=Nida%20Mushtaq"> Nida Mushtaq</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Social media is not only acting as a medium of communication; rather it has provided a platform where customers can actually live with the brands they so dearly envy and interact with others with same interest. Organizations are making social media marketing efforts (SMME) to convert this opportunity into a meaningful experience. It may be resembled or considered as an act of branding where the notion is not only to understand the consumer behavior but also developing a strong link with them. Ultimately the quest is to influence and bend it into a mutual benefit of the stakeholders. This study investigates SMME of brands with the help of five dimensions (i.e., entertainment, interaction, trendiness, customization and word of mouth). The study has found that there is no significant impact of SMME as a construct on brand equity and consumer behavior. However, few of the dimensions (i.e. customization and word of mouth), have been found to have influence on brand equity (brand association, brand image) and consumer response (brand preferences). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=social%20media%20marketing%20efforts%20%28SMME%29" title="social media marketing efforts (SMME)">social media marketing efforts (SMME)</a>, <a href="https://publications.waset.org/abstracts/search?q=brand%20equity" title=" brand equity"> brand equity</a>, <a href="https://publications.waset.org/abstracts/search?q=preference" title=" preference"> preference</a>, <a href="https://publications.waset.org/abstracts/search?q=loyalty%20price%20premium" title=" loyalty price premium"> loyalty price premium</a>, <a href="https://publications.waset.org/abstracts/search?q=luxury%20brands" title=" luxury brands"> luxury brands</a>, <a href="https://publications.waset.org/abstracts/search?q=international" title=" international"> international</a> </p> <a href="https://publications.waset.org/abstracts/77129/social-media-marketing-efforts-to-influence-brand-equity-and-consumer-behavior-the-case-of-luxury-fashion-brands-in-pakistan" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/77129.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">355</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">532</span> ICT Training Programs in Tourism and Hospitality Institutes: An Analytical Study of Types, Effectiveness, and Graduate Perceived Importance</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Magdy%20Abdel-Aleem%20Abdel-Ati%20Mayouf">Magdy Abdel-Aleem Abdel-Ati Mayouf</a>, <a href="https://publications.waset.org/abstracts/search?q=Islam%20Al%20Sayed%20Hussein%20Al%20Sayed"> Islam Al Sayed Hussein Al Sayed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Development of tourism and hospitality faculties' graduates is a key to the future health of hospitality and tourism sectors. Meanwhile information and communication technologies (ICTs) increasingly become the driving engine for productivity improvement and business opportunities in tourism and hospitality industry. Tourism and hospitality education and training must address these developments to enhance the ability of future managers to adopt a variety of ICT tools and strategies to increase their organization's efficiency and competitiveness. Therefore, this study aims to explore the types and effectiveness of ICT training offered by faculties of tourism and hotels in Egypt, and evaluating the importance of that training from the graduate's point of view. The study targets the graduates who graduated in the present ten years from three different faculties of tourism and hotels. Results argued the types, levels and effectiveness of ICT training offered in these faculties and the extent to which training programs were appreciated by graduates working in different fields, and finally, it recommended particular practices to enhance the training efficiency and raising the perceived benefits of it for workers in tourism and hospitality fields. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=training" title="training">training</a>, <a href="https://publications.waset.org/abstracts/search?q=IT" title=" IT"> IT</a>, <a href="https://publications.waset.org/abstracts/search?q=graduated" title=" graduated"> graduated</a>, <a href="https://publications.waset.org/abstracts/search?q=tourism%20and%20hospitality" title=" tourism and hospitality"> tourism and hospitality</a>, <a href="https://publications.waset.org/abstracts/search?q=education" title=" education"> education</a> </p> <a href="https://publications.waset.org/abstracts/46124/ict-training-programs-in-tourism-and-hospitality-institutes-an-analytical-study-of-types-effectiveness-and-graduate-perceived-importance" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46124.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">362</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">531</span> Multi-Class Text Classification Using Ensembles of Classifiers </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Syed%20Basit%20Ali%20Shah%20Bukhari">Syed Basit Ali Shah Bukhari</a>, <a href="https://publications.waset.org/abstracts/search?q=Yan%20%20Qiang"> Yan Qiang</a>, <a href="https://publications.waset.org/abstracts/search?q=Saad%20Abdul%20Rauf"> Saad Abdul Rauf</a>, <a href="https://publications.waset.org/abstracts/search?q=Syed%20Saqlaina%20Bukhari"> Syed Saqlaina Bukhari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Text Classification is the methodology to classify any given text into the respective category from a given set of categories. It is highly important and vital to use proper set of pre-processing , feature selection and classification techniques to achieve this purpose. In this paper we have used different ensemble techniques along with variance in feature selection parameters to see the change in overall accuracy of the result and also on some other individual class based features which include precision value of each individual category of the text. After subjecting our data through pre-processing and feature selection techniques , different individual classifiers were tested first and after that classifiers were combined to form ensembles to increase their accuracy. Later we also studied the impact of decreasing the classification categories on over all accuracy of data. Text classification is highly used in sentiment analysis on social media sites such as twitter for realizing people’s opinions about any cause or it is also used to analyze customer’s reviews about certain products or services. Opinion mining is a vital task in data mining and text categorization is a back-bone to opinion mining. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Natural%20Language%20Processing" title="Natural Language Processing">Natural Language Processing</a>, <a href="https://publications.waset.org/abstracts/search?q=Ensemble%20Classifier" title=" Ensemble Classifier"> Ensemble Classifier</a>, <a href="https://publications.waset.org/abstracts/search?q=Bagging%20Classifier" title=" Bagging Classifier"> Bagging Classifier</a>, <a href="https://publications.waset.org/abstracts/search?q=AdaBoost" title=" AdaBoost"> AdaBoost</a> </p> <a href="https://publications.waset.org/abstracts/123394/multi-class-text-classification-using-ensembles-of-classifiers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/123394.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">232</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">530</span> In vitro Susceptibility of Madurella mycetomatis to the Extracts of Anogeissus leiocarpus Leaves</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ikram%20Mohamed%20Eltayeb%20Elsiddig">Ikram Mohamed Eltayeb Elsiddig</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdel%20Khalig%20Muddather"> Abdel Khalig Muddather</a>, <a href="https://publications.waset.org/abstracts/search?q=Hiba%20Abdel%20Rahman%20Ali"> Hiba Abdel Rahman Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Saad%20Mohamed%20Hussein%20Ayoub"> Saad Mohamed Hussein Ayoub</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Anogeissusleiocarpus (Combretaceae) is well known for its medicinal uses in African traditional medicine, for treating many human diseases mainly skin diseases and infections.Mycetoma disease is a fungal and/ or bacterial skin infection, mainly cause by Madurella mycetomatis fungus.This study was carried out in vitro to investigate the antifungal activity of Anogeissusleiocarpus leaf extracts against the isolated pathogenicMadurellamycetomatis, by using the NCCLS modified method compared to Ketoconazole standard drug and MTT assay. The bioactive fraction was subjected to chemical analysis implementing different chromatographic analytical methods (TLC, HPLC, and LC-MS/MS). The results showed significance antifungal activity of A. leiocarpus leaf extractsagainst the isolated pathogenicM. mycetomatis, compared to negative and positive controls. The chloroform fraction showed the highest antifungal activity.The chromatographic analysis of the chloroform fraction with the highest activity showed the presence of important bioactive compounds such as ellagic and flavellagic acids derivatives, flavonoids and stilbenoid, which are well known for their antifungal activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anogeissus%20leiocarpus" title="Anogeissus leiocarpus">Anogeissus leiocarpus</a>, <a href="https://publications.waset.org/abstracts/search?q=crude%20extracts%20and%20fractions%20of%20Anogeissus%20leiocarpus" title=" crude extracts and fractions of Anogeissus leiocarpus"> crude extracts and fractions of Anogeissus leiocarpus</a>, <a href="https://publications.waset.org/abstracts/search?q=in%20vitrosusceptibility%20of%20Madurella%20mycetomatis" title=" in vitrosusceptibility of Madurella mycetomatis"> in vitrosusceptibility of Madurella mycetomatis</a>, <a href="https://publications.waset.org/abstracts/search?q=Madurella%20mycetomatis" title=" Madurella mycetomatis"> Madurella mycetomatis</a> </p> <a href="https://publications.waset.org/abstracts/32638/in-vitro-susceptibility-of-madurella-mycetomatis-to-the-extracts-of-anogeissus-leiocarpus-leaves" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32638.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">622</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">529</span> Prediction of Music Track Popularity: A Machine Learning Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Syed%20Atif%20Hassan">Syed Atif Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=Luv%20Mehta"> Luv Mehta</a>, <a href="https://publications.waset.org/abstracts/search?q=Syed%20Asif%20Hassan"> Syed Asif Hassan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hit song science is a field of investigation wherein machine learning techniques are applied to music tracks in order to extract such features from audio signals which can capture information that could explain the popularity of respective tracks. Record companies invest huge amounts of money into recruiting fresh talents and churning out new music each year. Gaining insight into the basis of why a song becomes popular will result in tremendous benefits for the music industry. This paper aims to extract basic musical and more advanced, acoustic features from songs while also taking into account external factors that play a role in making a particular song popular. We use a dataset derived from popular Spotify playlists divided by genre. We use ten genres (blues, classical, country, disco, hip-hop, jazz, metal, pop, reggae, rock), chosen on the basis of clear to ambiguous delineation in the typical sound of their genres. We feed these features into three different classifiers, namely, SVM with RBF kernel, a deep neural network, and a recurring neural network, to build separate predictive models and choosing the best performing model at the end. Predicting song popularity is particularly important for the music industry as it would allow record companies to produce better content for the masses resulting in a more competitive market. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=classifier" title="classifier">classifier</a>, <a href="https://publications.waset.org/abstracts/search?q=machine%20learning" title=" machine learning"> machine learning</a>, <a href="https://publications.waset.org/abstracts/search?q=music%20tracks" title=" music tracks"> music tracks</a>, <a href="https://publications.waset.org/abstracts/search?q=popularity" title=" popularity"> popularity</a>, <a href="https://publications.waset.org/abstracts/search?q=prediction" title=" prediction"> prediction</a> </p> <a href="https://publications.waset.org/abstracts/65509/prediction-of-music-track-popularity-a-machine-learning-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65509.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">663</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">528</span> The Effect of Drug Prevention Programme Based On Cognitive-Behavioral Therapy (CBT) and Multidimensional Self Concept Module Towards Resiliency and Aggression Among At-Risk Youth in Malaysia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Aziz%20Shah%20Mohamed%20Arip">Mohammad Aziz Shah Mohamed Arip</a>, <a href="https://publications.waset.org/abstracts/search?q=Aslina%20Ahmad"> Aslina Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=Fauziah%20Mohd%20Sa%27ad"> Fauziah Mohd Sa'ad</a>, <a href="https://publications.waset.org/abstracts/search?q=Samsiah%20Mohd%20Jais"> Samsiah Mohd Jais</a>, <a href="https://publications.waset.org/abstracts/search?q=Syed%20Sofian%20Syed%20Salim"> Syed Sofian Syed Salim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This experimental study evaluates the effect of using Cognitive-Behavioral Therapy (CBT) and Multidimensional Self-Concept Model (MSCM) in a drug prevention programme to increase resiliency and reduce aggression among at-risk youth in Malaysia. A number of 60 (N=60) university students who were at-risk of taking drugs were involved in this study. Participants were identified with self-rating scales, Adolescent Resilience Attitude Scale (ARAS) and Aggression Questionnaire. Based on the mean score of these instruments, the participants were divided into the treatment group, and the control group. Data were analyzed using t-test. The finding showed that the mean score of resiliency was increased in the treatment group compared to the control group. It also shows that the mean score of aggression was reduced in the treatment group compared to the control group. Drug Prevention Programme was found to help in enhancing resiliency and reducing aggression among participants in the treatment group compared to the controlled group. Implications were given regarding the preventive actions on drug abuse among youth in Malaysia. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=drug%20prevention%20programme" title="drug prevention programme">drug prevention programme</a>, <a href="https://publications.waset.org/abstracts/search?q=cognitive-behavioral%20therapy%20%28CBT%29" title=" cognitive-behavioral therapy (CBT)"> cognitive-behavioral therapy (CBT)</a>, <a href="https://publications.waset.org/abstracts/search?q=multidimensional%20self%20concept%20model%20%28MSCM%29" title=" multidimensional self concept model (MSCM)"> multidimensional self concept model (MSCM)</a>, <a href="https://publications.waset.org/abstracts/search?q=resiliency" title=" resiliency"> resiliency</a>, <a href="https://publications.waset.org/abstracts/search?q=aggression" title=" aggression"> aggression</a>, <a href="https://publications.waset.org/abstracts/search?q=at-risk%20youth" title=" at-risk youth"> at-risk youth</a> </p> <a href="https://publications.waset.org/abstracts/18435/the-effect-of-drug-prevention-programme-based-on-cognitive-behavioral-therapy-cbt-and-multidimensional-self-concept-module-towards-resiliency-and-aggression-among-at-risk-youth-in-malaysia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18435.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">728</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">527</span> Developing Mathematical Relationships to Evaluate the Amount of Added Ease to the Basic Pattern of Weft Knitting Fabrics and Its Fitting to the Upper Part of Egyptian Women's Bodies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hebatullah%20Ali%20Abdel-Aleem%20Abdel-Hamid">Hebatullah Ali Abdel-Aleem Abdel-Hamid</a>, <a href="https://publications.waset.org/abstracts/search?q=Camellia%20Mousa%20Mohamed%20Elzean"> Camellia Mousa Mohamed Elzean</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Knitted garments recently became a key component in wardrobes of the Egyptian woman. Many Egyptian women depend on garments made of knitted fabrics in their outer appearance because of its specific properties including flexibility. Through observation and application, it was noticed that knitwear blocks that used for knitted fabrics somehow does not fit the figures of the Egyptian women. Moreover, the pattern makers are usually confused and unable to choose the suitable blocks for different knitting fabrics taking into consideration its physical and mechanical properties. This study seeks to develop mathematical relationships for evaluation of the amount of added- or subtracted ease to Aldrich’s basic fitting blocks for some weft knitting fabrics and its fitting to the upper part of Egyptian women's bodies. To achieve this goal, 12 samples were used to evaluate fitting of Aldrich’s Basic Fitting Block to the upper part of Egyptian women's bodies. The samples were evaluated before and after alterations, through wear trials on the standard mannequins of size 48 and 56, and judged by experienced assessors using fit evaluation scale. The data obtained were statistically analyzed to identify the efficiency of the adjustments. The Aldrich’s Basic Fitting Block was selected because his method is known internationally and easy to use. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aldrich%20basic%20fitting%20block" title="Aldrich basic fitting block">Aldrich basic fitting block</a>, <a href="https://publications.waset.org/abstracts/search?q=clothing%20industry" title=" clothing industry"> clothing industry</a>, <a href="https://publications.waset.org/abstracts/search?q=knitted%20fabrics" title=" knitted fabrics"> knitted fabrics</a>, <a href="https://publications.waset.org/abstracts/search?q=pattern%20construction" title=" pattern construction"> pattern construction</a> </p> <a href="https://publications.waset.org/abstracts/73581/developing-mathematical-relationships-to-evaluate-the-amount-of-added-ease-to-the-basic-pattern-of-weft-knitting-fabrics-and-its-fitting-to-the-upper-part-of-egyptian-womens-bodies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73581.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">266</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">526</span> Evaluating Health-Related Quality of Life of Lost to Follow-Up Tuberculosis Patients in Yemen</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ammar%20Ali%20Saleh%20Jaber">Ammar Ali Saleh Jaber</a>, <a href="https://publications.waset.org/abstracts/search?q=Amer%20Hayat%20Khan"> Amer Hayat Khan</a>, <a href="https://publications.waset.org/abstracts/search?q=Syed%20Azhar%20Syed%20Sulaiman"> Syed Azhar Syed Sulaiman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Tuberculosis (TB) is considered as a major disease that affects daily activities and impairs health-related quality of life (HRQoL). The impact of TB on HRQoL can affect treatment outcome and may lead to treatment defaulting. Therefore, this study aims to evaluate the HRQoL of TB treatment lost to follow-up during and after treatment in Yemen. For this aim, this prospective study enrolled a total of 399 TB lost to follow-up patients between January 2011 and December 2015. By applying HRQoL criteria, only 136 fill the survey during treatment. Moreover, 96 were traced and fill out the HRQoL survey. All eight HRQol domains were categorized into the physical component score (PCS) and mental component score (MCS), which were calculated using QM scoring software. Results show that all lost to follow-up TB patients reported a score less than 47 for all eight domains, except general health (67.3) during their treatment period. Low scores of 27.9 and 29.8 were reported for emotional role limitation (RE) and mental health (MH), respectively. Moreover, the mental component score (MCS) was found to be only 28.9. The trace lost follow-up shows a significant improvement in all eight domains and a mental component score of 43.1. The low scores of 27.9 and 29.8 for role emotion and mental health, respectively, in addition to the MCS score of 28.9, show that severe emotional condition and reflect the higher depression during treatment period that can result to lost to follow-up. The low MH, RE, and MCS can be used as a clue for predicting future TB treatment lost to follow-up. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yemen" title="Yemen">Yemen</a>, <a href="https://publications.waset.org/abstracts/search?q=tuberculosis" title=" tuberculosis"> tuberculosis</a>, <a href="https://publications.waset.org/abstracts/search?q=health-related%20quality%20of%20life" title=" health-related quality of life"> health-related quality of life</a>, <a href="https://publications.waset.org/abstracts/search?q=Khat" title=" Khat"> Khat</a> </p> <a href="https://publications.waset.org/abstracts/102697/evaluating-health-related-quality-of-life-of-lost-to-follow-up-tuberculosis-patients-in-yemen" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/102697.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">173</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">525</span> Factors Controlling Durability of Some Egyptian Non-Stylolitic Marbleized Limestone to Salt Weathering</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20El%20Shayab">H. El Shayab</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20M.%20Kamh"> G. M. Kamh</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20G.%20Abdel%20Ghafour"> N. G. Abdel Ghafour</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20L.%20Abdel%20Latif"> M. L. Abdel Latif </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nowadays, marbleized limestone becomes one of the most important sources of the mineral wealth in Egypt as they have beautiful colors (white, grey, rose, yellow and creamy, etc.) make it very suitable for decoration purposes. Non-styolitic marbleized limestone which not contains styolitic surfaces. The current study aims to study different factors controlling durability of non-styolitic marbleized limestone against salt crystallization weathering. The achievement aim of the research was required nine representative samples were collected from the studied areas. Three samples from each of the studied areas. The studied samples was characterized by various instrumental methods before salt weathering, to determine its mineralogical composition, chemical composition and pore physical properties respectively. The obtained results revealed that both of Duwi and Delga studied samples nearly have the same average ∆M% 1.63 and 1.51 respectively and consequently A.I. stage of deformation. On the other hand, average ∆M% of Wata studied samples is 0.29 i.e. lower than two other studied areas. Wata studied samples are more durable against salt crystallization test than Duwi and Delga. The difference in salt crystallization durability may be resulted from one of the following factors: Microscopic textural effect as both of micrite and skeletal percent are in directly proportional to durability of stones to salt weathering. Dolomite mineral present as a secondary are in indirectly proportional to durability of stones to salt weathering. Increase in MgO% also associated with decrease the durability of studied samples against salt crystallization test. Finally, all factors affecting positively against salt crystallization test presents in Wadi Wata studied samples rather than others two areas. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=marbleized%20limestone" title="marbleized limestone">marbleized limestone</a>, <a href="https://publications.waset.org/abstracts/search?q=salt%20weathering" title=" salt weathering"> salt weathering</a>, <a href="https://publications.waset.org/abstracts/search?q=Wata" title=" Wata"> Wata</a>, <a href="https://publications.waset.org/abstracts/search?q=salt%20weathering" title=" salt weathering"> salt weathering</a> </p> <a href="https://publications.waset.org/abstracts/11044/factors-controlling-durability-of-some-egyptian-non-stylolitic-marbleized-limestone-to-salt-weathering" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11044.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">327</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">524</span> Effects of Position and Shape of Atomic Defects on the Band Gap of Graphene Nano-Ribbon Superlattices</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeinab%20Jokar">Zeinab Jokar</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Reza%20Moslemi"> Mohammad Reza Moslemi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, we study the behavior of introducing atomic size vacancy in a graphene nanoribbon superlattice. Our investigations are based on the density functional theory (DFT) with the Local Density Approximation in Atomistix Toolkit (ATK). We show that, in addition to its shape, the position of vacancy has a major impact on the electrical properties of a graphene nanoribbon superlattice. We show that the band gap of an armchair graphene nanoribbon may be tuned by introducing an appropriate periodic pattern of vacancies. The band gap changes in a zig-zag manner similar to the variation of the band gap of a graphene nanoribbon by changing its width. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AGNR" title="AGNR">AGNR</a>, <a href="https://publications.waset.org/abstracts/search?q=antidot" title=" antidot"> antidot</a>, <a href="https://publications.waset.org/abstracts/search?q=atomistic%20toolKit" title=" atomistic toolKit"> atomistic toolKit</a>, <a href="https://publications.waset.org/abstracts/search?q=vacancy" title=" vacancy"> vacancy</a> </p> <a href="https://publications.waset.org/abstracts/20917/effects-of-position-and-shape-of-atomic-defects-on-the-band-gap-of-graphene-nano-ribbon-superlattices" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20917.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">1006</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">523</span> The Journey to Social Entrepreneurship: Profile Analysis of Social Enterprises in Morocco</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeinab%20Hmama">Zeinab Hmama</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Much recent discourse has highlighted the supporting role of social entrepreneurs in solving social problems. However, the identification of social enterprise’s characteristics in emerging countries has not yet been thoroughly examined. This research seeks to explores the profile of social enterprises in Morocco. In this perspective, we conduct a quantitative study on a sample of 87 social enterprises. This study was undertaken in Morocco based on a quantitative study lead among sample consists of 82 organizations qualified as social enterprises. Therefore, the response rate was 45.12% (37/82). Participants in the study were described on the basis of the following demographic characteristics: Gender, Age, Education Level and field, Entrepreneurial activity age, Legal forms, Line of business. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=social%20entrepreneurship" title="social entrepreneurship">social entrepreneurship</a>, <a href="https://publications.waset.org/abstracts/search?q=social%20enterprise" title=" social enterprise"> social enterprise</a>, <a href="https://publications.waset.org/abstracts/search?q=problem%20resolution" title=" problem resolution"> problem resolution</a>, <a href="https://publications.waset.org/abstracts/search?q=value%20creation" title=" value creation"> value creation</a> </p> <a href="https://publications.waset.org/abstracts/148086/the-journey-to-social-entrepreneurship-profile-analysis-of-social-enterprises-in-morocco" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/148086.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">153</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">522</span> Indoleamine 2,3 Dioxygenase and Regulatory T Cells in Acute Myeloid Leukemia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Iman%20M.%20Mansour">Iman M. Mansour</a>, <a href="https://publications.waset.org/abstracts/search?q=Rania%20A.%20Zayed"> Rania A. Zayed</a>, <a href="https://publications.waset.org/abstracts/search?q=Fadwa%20S.%20Abdel-Azim"> Fadwa S. Abdel-Azim</a>, <a href="https://publications.waset.org/abstracts/search?q=Lamyaa%20H.%20Abdel-Latif"> Lamyaa H. Abdel-Latif</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background and Objectives: The microenvironment of acute myeloid leukemia (AML) is suppressive for immune cells. Regulatory T cells (Tregs) have been recognized to play a role in helping leukemic cells to evade immunesurveillance. The mesenchymal stem cells (MSCs) are essential contributors in immunomodulation of the microenvironment as they can promote differentiation of Tregs via the indoleamine 2,3-dioxygenase (IDO) pathway. The aim of the present work was to evaluate the expression of IDO in bone marrow derived MSCs and to study its correlation to percentage of Tregs. Methods: 37 adult bone marrow samples were cultured in appropriate culture medium to isolate MSCs. Successful harvest of MSCs was determined by plastic adherence, morphology and positive expression of CD271 and CD105; negative expression of CD34 and CD45 using flowcytometry. MSCs were examined for IDO expression by immunocytochemistry using anti-IDO monoclonal antibody. CD4+ CD25+ cells (Tregs) were measured in bone marrow samples by flowcytometry. Results: MSCs were successfully isolated from 20 of the 37 bone marrow samples cultured. MSCs showed higher expression of IDO and Tregs percentage was higher in AML patients compared to control subjects (p=0.002 and p<0.001 respectively). A positive correlation was found between IDO expression and Tregs percentage (p value=0.012, r=0.5). Conclusion: In this study, we revealed an association between high IDO expression in MSCs and elevated levels of Tregs which has an important role in the pathogenesis of AML, providing immunosuppressive microenvironment. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=acute%20myeloid%20leukemia" title="acute myeloid leukemia">acute myeloid leukemia</a>, <a href="https://publications.waset.org/abstracts/search?q=indoleamine%202" title=" indoleamine 2"> indoleamine 2</a>, <a href="https://publications.waset.org/abstracts/search?q=3-dioxygenase" title="3-dioxygenase">3-dioxygenase</a>, <a href="https://publications.waset.org/abstracts/search?q=mesenchymal%20stem%20cells" title=" mesenchymal stem cells"> mesenchymal stem cells</a>, <a href="https://publications.waset.org/abstracts/search?q=T%20regulatory%20cells" title=" T regulatory cells"> T regulatory cells</a> </p> <a href="https://publications.waset.org/abstracts/24445/indoleamine-23-dioxygenase-and-regulatory-t-cells-in-acute-myeloid-leukemia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24445.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">359</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">521</span> Aerodynamic Heating and Drag Reduction of Pegasus-XL Satellite Launch Vehicle</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Syed%20Muhammad%20Awais%20Tahir">Syed Muhammad Awais Tahir</a>, <a href="https://publications.waset.org/abstracts/search?q=Syed%20Hossein%20Raza%20Hamdani"> Syed Hossein Raza Hamdani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the last two years, there has been a substantial increase in the rate of satellite launches. To keep up with the technology, it is imperative that the launch cost must be made affordable, especially in developing and underdeveloped countries. Launch cost is directly affected by the launch vehicle’s aerodynamic performance. Pegasus-XL SLV (Satellite Launch Vehicle) has been serving as a commercial SLV for the last 26 years, commencing its commercial flight operation from the six operational sites all around the US and Europe, and the Marshal Islands. Aerodynamic heating and drag contribute largely to Pegasus’s flight performance. The objective of this study is to reduce the aerodynamic heating and drag on Pegasus’s body significantly for supersonic and hypersonic flight regimes. Aerodynamic data for Pegasus’s first flight has been validated through CFD (Computational Fluid Dynamics), and then drag and aerodynamic heating is reduced by using a combination of a forward-facing cylindrical spike and a conical aero-disk at the actual operational flight conditions. CFD analysis using ANSYS fluent will be carried out for Mach no. ranges from 0.83 to 7.8, and AoA (Angle of Attack) ranges from -4 to +24 degrees for both simple and spiked-configuration, and then the comparison will be drawn using a variety of graphs and contours. Expected drag reduction for supersonic flight is to be around 15% to 25%, and for hypersonic flight is to be around 30% to 50%, especially for AoA < 15⁰. A 5% to 10% reduction in aerodynamic heating is expected to be achieved for hypersonic regions. In conclusion, the aerodynamic performance of air-launched Pegasus-XL SLV can be further enhanced, leading to its optimal fuel usage to achieve a more economical orbital flight. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aerodynamics" title="aerodynamics">aerodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=pegasus-XL" title=" pegasus-XL"> pegasus-XL</a>, <a href="https://publications.waset.org/abstracts/search?q=drag%20reduction" title=" drag reduction"> drag reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=aerodynamic%20heating" title=" aerodynamic heating"> aerodynamic heating</a>, <a href="https://publications.waset.org/abstracts/search?q=satellite%20launch%20vehicle" title=" satellite launch vehicle"> satellite launch vehicle</a>, <a href="https://publications.waset.org/abstracts/search?q=SLV" title=" SLV"> SLV</a>, <a href="https://publications.waset.org/abstracts/search?q=spike" title=" spike"> spike</a>, <a href="https://publications.waset.org/abstracts/search?q=aero-disk" title=" aero-disk"> aero-disk</a> </p> <a href="https://publications.waset.org/abstracts/150232/aerodynamic-heating-and-drag-reduction-of-pegasus-xl-satellite-launch-vehicle" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150232.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">107</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=Zeinab%20Syed%20Abdel%20Rehim&page=2">2</a></li> <li class="page-item"><a class="page-link" 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