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Neji</title> <meta name="description" content="Search results for: Mahmoud Neji"> <meta name="keywords" content="Mahmoud Neji"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler 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id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Mahmoud Neji"> <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> 375</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Mahmoud Neji</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">375</span> A Semantic E-Learning and E-Assessment System of Learners </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wiem%20Ben%20Khalifa">Wiem Ben Khalifa</a>, <a href="https://publications.waset.org/abstracts/search?q=Dalila%20Souilem"> Dalila Souilem</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji"> Mahmoud Neji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The evolutions of Social Web and Semantic Web lead us to ask ourselves about the way of supporting the personalization of learning by means of intelligent filtering of educational resources published in the digital networks. We recommend personalized courses of learning articulated around a first educational course defined upstream. Resuming the context and the stakes in the personalization, we also suggest anchoring the personalization of learning in a community of interest within a group of learners enrolled in the same training. This reflection is supported by the display of an active and semantic system of learning dedicated to the constitution of personalized to measure courses and in the due time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Semantic%20Web" title="Semantic Web">Semantic Web</a>, <a href="https://publications.waset.org/abstracts/search?q=semantic%20system" title=" semantic system"> semantic system</a>, <a href="https://publications.waset.org/abstracts/search?q=ontology" title=" ontology"> ontology</a>, <a href="https://publications.waset.org/abstracts/search?q=evaluation" title=" evaluation"> evaluation</a>, <a href="https://publications.waset.org/abstracts/search?q=e-learning" title=" e-learning"> e-learning</a> </p> <a href="https://publications.waset.org/abstracts/72932/a-semantic-e-learning-and-e-assessment-system-of-learners" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/72932.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">374</span> A Preliminary Study for Building an Arabic Corpus of Pair Questions-Texts from the Web: Aqa-Webcorp</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wided%20Bakari">Wided Bakari</a>, <a href="https://publications.waset.org/abstracts/search?q=Patrce%20Bellot"> Patrce Bellot</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji"> Mahmoud Neji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> With the development of electronic media and the heterogeneity of Arabic data on the Web, the idea of building a clean corpus for certain applications of natural language processing, including machine translation, information retrieval, question answer, become more and more pressing. In this manuscript, we seek to create and develop our own corpus of pair’s questions-texts. This constitution then will provide a better base for our experimentation step. Thus, we try to model this constitution by a method for Arabic insofar as it recovers texts from the web that could prove to be answers to our factual questions. To do this, we had to develop a java script that can extract from a given query a list of html pages. Then clean these pages to the extent of having a database of texts and a corpus of pair’s question-texts. In addition, we give preliminary results of our proposal method. Some investigations for the construction of Arabic corpus are also presented in this document. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arabic" title="Arabic">Arabic</a>, <a href="https://publications.waset.org/abstracts/search?q=web" title=" web"> web</a>, <a href="https://publications.waset.org/abstracts/search?q=corpus" title=" corpus"> corpus</a>, <a href="https://publications.waset.org/abstracts/search?q=search%20engine" title=" search engine"> search engine</a>, <a href="https://publications.waset.org/abstracts/search?q=URL" title=" URL"> URL</a>, <a href="https://publications.waset.org/abstracts/search?q=question" title=" question"> question</a>, <a href="https://publications.waset.org/abstracts/search?q=corpus%20building" title=" corpus building"> corpus building</a>, <a href="https://publications.waset.org/abstracts/search?q=script" title=" script"> script</a>, <a href="https://publications.waset.org/abstracts/search?q=Google" title=" Google"> Google</a>, <a href="https://publications.waset.org/abstracts/search?q=html" title=" html"> html</a>, <a href="https://publications.waset.org/abstracts/search?q=txt" title=" txt"> txt</a> </p> <a href="https://publications.waset.org/abstracts/46758/a-preliminary-study-for-building-an-arabic-corpus-of-pair-questions-texts-from-the-web-aqa-webcorp" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46758.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">323</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">373</span> Collaborative and Context-Aware Learning Approach Using Mobile Technology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sameh%20Baccari">Sameh Baccari</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji"> Mahmoud Neji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In recent years, the rapid developments on mobile devices and wireless technologies enable new dimension capabilities for the learning domain. This dimension facilitates people daily activities and shortens the distances between individuals. When these technologies have been used in learning, a new paradigm has been emerged giving birth to mobile learning. Because of the mobility feature, m-learning courses have to be adapted dynamically to the learner’s context. The main challenge in context-aware mobile learning is to develop an approach building the best learning resources according to dynamic learning situations. In this paper, we propose a context-aware mobile learning system called Collaborative and Context-aware Mobile Learning System (CCMLS). It takes into account the requirements of Mobility, Collaboration and Context-Awareness. This system is based on the semantic modeling of the learning context and the learning content. The adaptation part of this approach is made up of adaptation rules to propose and select relevant resources, learning partners and learning activities based not only on the user’s needs, but also on its current context. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mobile%20learning" title="mobile learning">mobile learning</a>, <a href="https://publications.waset.org/abstracts/search?q=mobile%20technologies" title=" mobile technologies"> mobile technologies</a>, <a href="https://publications.waset.org/abstracts/search?q=context-awareness" title=" context-awareness"> context-awareness</a>, <a href="https://publications.waset.org/abstracts/search?q=collaboration" title=" collaboration"> collaboration</a>, <a href="https://publications.waset.org/abstracts/search?q=semantic%20web" title=" semantic web"> semantic web</a>, <a href="https://publications.waset.org/abstracts/search?q=adaptation%20engine" title=" adaptation engine"> adaptation engine</a>, <a href="https://publications.waset.org/abstracts/search?q=adaptation%20strategy" title=" adaptation strategy"> adaptation strategy</a>, <a href="https://publications.waset.org/abstracts/search?q=learning%20object" title=" learning object"> learning object</a>, <a href="https://publications.waset.org/abstracts/search?q=learning%20context" title=" learning context"> learning context</a> </p> <a href="https://publications.waset.org/abstracts/86589/collaborative-and-context-aware-learning-approach-using-mobile-technology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/86589.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">308</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">372</span> Towards Logical Inference for the Arabic Question-Answering</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wided%20Bakari">Wided Bakari</a>, <a href="https://publications.waset.org/abstracts/search?q=Patrice%20Bellot"> Patrice Bellot</a>, <a href="https://publications.waset.org/abstracts/search?q=Omar%20Trigui"> Omar Trigui</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji"> Mahmoud Neji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article constitutes an opening to think of the modeling and analysis of Arabic texts in the context of a question-answer system. It is a question of exceeding the traditional approaches focused on morphosyntactic approaches. Furthermore, we present a new approach that analyze a text in order to extract correct answers then transform it to logical predicates. In addition, we would like to represent different levels of information within a text to answer a question and choose an answer among several proposed. To do so, we transform both the question and the text into logical forms. Then, we try to recognize all entailment between them. The results of recognizing the entailment are a set of text sentences that can implicate the user’s question. Our work is now concentrated on an implementation step in order to develop a system of question-answering in Arabic using techniques to recognize textual implications. In this context, the extraction of text features (keywords, named entities, and relationships that link them) is actually considered the first step in our process of text modeling. The second one is the use of techniques of textual implication that relies on the notion of inference and logic representation to extract candidate answers. The last step is the extraction and selection of the desired answer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=NLP" title="NLP">NLP</a>, <a href="https://publications.waset.org/abstracts/search?q=Arabic%20language" title=" Arabic language"> Arabic language</a>, <a href="https://publications.waset.org/abstracts/search?q=question-answering" title=" question-answering"> question-answering</a>, <a href="https://publications.waset.org/abstracts/search?q=recognition%20text%20entailment" title=" recognition text entailment"> recognition text entailment</a>, <a href="https://publications.waset.org/abstracts/search?q=logic%20forms" title=" logic forms"> logic forms</a> </p> <a href="https://publications.waset.org/abstracts/27265/towards-logical-inference-for-the-arabic-question-answering" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27265.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">342</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">371</span> Spectra of Mahmoud Darwish: Argumentative Approach in the Poem "Identity Card"</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Haitham%20Sarhan">Haitham Sarhan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The experience of Mahmoud Darwish’s poetry represents one of the leading Arabic creative experiences because of its cultural specificity which is linked to the question of Palestine and its people. The poet Mahmoud Darwish does not stop there, but also reaches out to the whole of the cosmic and openness of the universal human experience. His poetry is rooted in a creative period, and was able to surpass its time. Mahmoud Darwish’s poetry contains diverse metaphors and worlds of genres, which overextends from direct romance to the lattice resistance and further stretches to the imaginary world and to the grand narratives. The poem "Identity Card" was published in his collections "Olive Leaves" and was issued in 1963. This collection highlighted the poems which included a revolutionary position, and formed a 'manifesto' and the statement of the Palestinian resistance, which represented the league of poets of Palestine. This poem has contributed along with other poems in creating a flame of resistance and increased it in the hearts of the Palestinian people. It also exercised considerable influence in the Arab world through what has been wrought from emotional responses and revolutionary impact which still remains. Moreover, this poem has succeeded with other resistance poems and postmodern poets like Nizar Qabbani in bringing modern poetry and culturally transmitted it among the Arab peoples and the masses. In spite of the fact that the poet Mahmoud Darwish exceeded this poem creatively through his other great works, "Identity Card" still has a great effect on peoples past memory’s and present. This need to hear this poem in Mahmoud Darwish’s poetic readings reflects peoples frustration and anger. It is safe to say that it is enticing people to this present day. This revolutionary poem had and still has a magical effect on Arab world. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arab%20contemporary%20poetry" title="Arab contemporary poetry">Arab contemporary poetry</a>, <a href="https://publications.waset.org/abstracts/search?q=identity" title=" identity"> identity</a>, <a href="https://publications.waset.org/abstracts/search?q=memory" title=" memory"> memory</a>, <a href="https://publications.waset.org/abstracts/search?q=argumentation" title=" argumentation"> argumentation</a> </p> <a href="https://publications.waset.org/abstracts/38610/spectra-of-mahmoud-darwish-argumentative-approach-in-the-poem-identity-card" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/38610.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">434</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">370</span> SOM Map vs Hopfield Neural Network: A Comparative Study in Microscopic Evacuation Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zouhour%20Neji%20Ben%20Salem">Zouhour Neji Ben Salem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Microscopic evacuation focuses on the evacuee behavior and way of search of safety place in an egress situation. In recent years, several models handled microscopic evacuation problem. Among them, we have proposed Artificial Neural Network (ANN) as an alternative to mathematical models that can deal with such problem. In this paper, we present two ANN models: SOM map and Hopfield Network used to predict the evacuee behavior in a disaster situation. These models are tested in a real case, the second floor of Tunisian children hospital evacuation in case of fire. The two models are studied and compared in order to evaluate their performance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=artificial%20neural%20networks" title="artificial neural networks">artificial neural networks</a>, <a href="https://publications.waset.org/abstracts/search?q=self-organization%20map" title=" self-organization map"> self-organization map</a>, <a href="https://publications.waset.org/abstracts/search?q=hopfield%20network" title=" hopfield network"> hopfield network</a>, <a href="https://publications.waset.org/abstracts/search?q=microscopic%20evacuation" title=" microscopic evacuation"> microscopic evacuation</a>, <a href="https://publications.waset.org/abstracts/search?q=fire%20building%20evacuation" title=" fire building evacuation"> fire building evacuation</a> </p> <a href="https://publications.waset.org/abstracts/27689/som-map-vs-hopfield-neural-network-a-comparative-study-in-microscopic-evacuation-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27689.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">404</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">369</span> Money as Motivation Amongst Industrial Sales People in Nigeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Rufai%20Mahmoud">Mahmoud Rufai Mahmoud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A look at existing literature on sales force motivation reveals lack of consensus on the role monetary rewards play in motivating salespeople. In view of the apparent contradiction inherent in the literature, it follows perhaps, chat sales managers are faced with the dilemma of what role to assign to monetary incentives in the scheme of motivating salespeople. This study investigated the perception of industrial salespeople on the role of money as a motivator. The result shows that salespeople believe that money is an important motivator whose power of motivation is influenced by a complex function of economic, social and psychological variables. Based on the findings, if is recommended that managers need different types of rewards to achieve a given level of motivation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=motivation" title="motivation">motivation</a>, <a href="https://publications.waset.org/abstracts/search?q=salespeople" title=" salespeople"> salespeople</a>, <a href="https://publications.waset.org/abstracts/search?q=money" title=" money"> money</a>, <a href="https://publications.waset.org/abstracts/search?q=Nigeria" title=" Nigeria"> Nigeria</a> </p> <a href="https://publications.waset.org/abstracts/18176/money-as-motivation-amongst-industrial-sales-people-in-nigeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18176.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">348</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">368</span> Failure Detection in an Edge Cracked Tapered Pipe Conveying Fluid Using Finite Element Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Gaith">Mohamed Gaith</a>, <a href="https://publications.waset.org/abstracts/search?q=Zaid%20Haddadin"> Zaid Haddadin</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdulah%20Wahbe"> Abdulah Wahbe</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Hamam"> Mahmoud Hamam</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Qunees"> Mahmoud Qunees</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Al%20Khatib"> Mohammad Al Khatib</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Bsaileh"> Mohammad Bsaileh</a>, <a href="https://publications.waset.org/abstracts/search?q=Abd%20Al-Aziz%20Jaber"> Abd Al-Aziz Jaber</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Aqra%E2%80%99a"> Ahmad Aqra’a</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The crack is one of the most common types of failure in pipelines that convey fluid, and early detection of the crack may assist to avoid the piping system from experiencing catastrophic damage, which would otherwise be fatal. The influence of flow velocity and the presence of a crack on the performance of a tapered simply supported pipe containing moving fluid is explored using the finite element approach in this study. ANSYS software is used to simulate the pipe as Bernoulli's beam theory. In this paper, the fluctuation of natural frequencies and matching mode shapes for various scenarios owing to changes in fluid speed and the presence of damage is discussed in detail. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=damage%20detection" title="damage detection">damage detection</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element" title=" finite element"> finite element</a>, <a href="https://publications.waset.org/abstracts/search?q=tapered%20pipe" title=" tapered pipe"> tapered pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration%20characteristics" title=" vibration characteristics"> vibration characteristics</a> </p> <a href="https://publications.waset.org/abstracts/149937/failure-detection-in-an-edge-cracked-tapered-pipe-conveying-fluid-using-finite-element-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149937.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">169</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">367</span> Nanofluid based on Zinc Oxide/Ferric Oxide Nanocomposite as Additive for Geothermal Drilling Fluids</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anwaar%20O.%20Ali">Anwaar O. Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Fathy%20Mubarak"> Mahmoud Fathy Mubarak</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Ibrahim%20Abdou"> Mahmoud Ibrahim Abdou</a>, <a href="https://publications.waset.org/abstracts/search?q=Hector%20Cano%20Esteban"> Hector Cano Esteban</a>, <a href="https://publications.waset.org/abstracts/search?q=Amany%20A.%20Aboulrous"> Amany A. Aboulrous</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Corrosion resistance and lubrication are crucial characteristics required for geothermal drilling fluids. In this study, a ZnO/Fe₂O₃ nanocomposite was fabricated and incorporated into the structure of Cetyltrimethylammonium bromide (CTAB). Several physicochemical techniques were utilized to analyze and describe the synthesized nanomaterials. The surface morphology of the composite was assessed through scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDAX). The corrosion inhibition capabilities of these materials were explored across various corrosive environments. The weight loss and electrochemical methods were utilized to determine the corrosion inhibition activity of the prepared nanomaterials. The results demonstrate a high level of protection achieved by the composite. Additionally, the lubricant coefficient and extreme pressure properties were evaluated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanofluid" title="nanofluid">nanofluid</a>, <a href="https://publications.waset.org/abstracts/search?q=corrosion" title=" corrosion"> corrosion</a>, <a href="https://publications.waset.org/abstracts/search?q=geothermal%20drilling%20fluids" title=" geothermal drilling fluids"> geothermal drilling fluids</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnO%2FFe2O3" title=" ZnO/Fe2O3"> ZnO/Fe2O3</a> </p> <a href="https://publications.waset.org/abstracts/182247/nanofluid-based-on-zinc-oxideferric-oxide-nanocomposite-as-additive-for-geothermal-drilling-fluids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182247.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">70</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">366</span> Evaluation of Water-Soluble Ionic Liquids Based on Quaternized Hyperbranched Polyamidoamine and Amino Acids for Chemical Enhanced Oil Recovery</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rasha%20Hosny">Rasha Hosny</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Zahran"> Ahmed Zahran</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Ramzi"> Mahmoud Ramzi</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatma%20Mahmoud%20Abdelhafiz"> Fatma Mahmoud Abdelhafiz</a>, <a href="https://publications.waset.org/abstracts/search?q=Ammona%20S.%20Mohamed"> Ammona S. Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Fathy%20Mubarak"> Mahmoud Fathy Mubarak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ionic liquids' ability to be tuned and stability under challenging environmental conditions are their significant features in enhanced oil recovery. In this study, two amino acid ionic liquids (AAILs) were prepared from quaternized hyperbranched polyamidoamine PAMAM (G0.5 C12) and amino acids (Cysteine and Lysine). The chemical structures of the prepared AAILs were verified by using FTIR and 1H-NMR spectra. These AAILs were tested for solubility, thermal stability, and surface activity in the presence of Egyptian medium crude oils under different PVT parameters after being diluted in several brine solutions of various salt compositions at 10% (w/w) salinity. The measurements reveal that the produced AAILs have good solubility and thermal stability. The effect of different concentrations of AAILs (0.1-5%) and salinity (20000-70000 ppm) on Interfacial tension (IFT) were studied. To test the efficacy of (AAILs) for a CEOR, numerous flooding experiments were carried out in samples of sandstone rock. Rock wettability is important for sandstone rocks, so conduct wettability alteration by contact angle (CA) of (30-55) and IFT of (7-13). The additional oil recovery was largely influenced by ionic liquid concentration, which may be changed by dilution with the formation and injected brines. This research has demonstrated that EOR techniques led to a recovery wt. (22-45%). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=amino%20acid%20ionic%20liquids" title="amino acid ionic liquids">amino acid ionic liquids</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20activity" title=" surface activity"> surface activity</a>, <a href="https://publications.waset.org/abstracts/search?q=critical%20micelle%20concentration" title=" critical micelle concentration"> critical micelle concentration</a>, <a href="https://publications.waset.org/abstracts/search?q=interfacial%20tension" title=" interfacial tension"> interfacial tension</a>, <a href="https://publications.waset.org/abstracts/search?q=contact%20angle" title=" contact angle"> contact angle</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20enhanced%20oil%20recovery" title=" chemical enhanced oil recovery"> chemical enhanced oil recovery</a>, <a href="https://publications.waset.org/abstracts/search?q=wettability" title=" wettability"> wettability</a> </p> <a href="https://publications.waset.org/abstracts/157261/evaluation-of-water-soluble-ionic-liquids-based-on-quaternized-hyperbranched-polyamidoamine-and-amino-acids-for-chemical-enhanced-oil-recovery" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157261.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">111</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">365</span> Effect of Chemistry Museum Artifacts on Students’ Memory Enhancement and Interest in Radioactivity in Calabar Education Zone, Cross River State, Nigeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hope%20Amba%20Neji">Hope Amba Neji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study adopted a quasi-experimental design. Two schools were used for the experimental study, while one school was used for the control. The experimental groups were subjected to treatment for four weeks with chemistry museum artifacts and a visit as made to the museum so that learners would have real-life learning experiences with museum resources, while the control group was taught with the conventional method. The instrument for the study was a 20-item Chemistry Memory Test (CMT) and a 10-item Chemistry Interest Questionnaire (CIQ). The reliability was ascertained using (KR-20) and alpha reliability coefficient, which yielded a reliability coefficient of .83 and .81, respectively. Data obtained was analyzed using Analysis of Covariance (ANCOVA) and Analysis of variance (ANOVA) at 0.05 level of significance. Findings revealed that museum artifacts have a significant effect on students’ memory enhancement and interest in chemistry. It was recommended chemistry learning should be enhanced, motivating and real with museum artifacts, which significantly aid memory enhancement and interest in chemistry. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=museum%20artifacts" title="museum artifacts">museum artifacts</a>, <a href="https://publications.waset.org/abstracts/search?q=memory" title=" memory"> memory</a>, <a href="https://publications.waset.org/abstracts/search?q=chemistry" title=" chemistry"> chemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=atitude" title=" atitude"> atitude</a> </p> <a href="https://publications.waset.org/abstracts/177785/effect-of-chemistry-museum-artifacts-on-students-memory-enhancement-and-interest-in-radioactivity-in-calabar-education-zone-cross-river-state-nigeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/177785.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">75</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">364</span> The Question of Choice in an Achievement Test: A Study on the Sudanese Case</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Abdelrazig%20Mahmoud%20Barakat">Mahmoud Abdelrazig Mahmoud Barakat </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Achievement tests administered at national level play a significant role in the lives of test-takers as well as the whole society. This paper aims to investigate the effect of giving students a choice between two optional questions on their overall performance in a high stake achievement test for university admission. It is hypothesized that questions targeting writing-based productive skills and language system necessitate display of abilities which are different from fact-based questions designed around story content. The two items are assumed to reflect different constructs that require different criteria of assessment. Consequently, the student’s overall score is affected by the item they choose to answer, which might not be reflective of their real language abilities. An open-ended interview was carried out with ten teachers working with grade 3 students in model secondary schools to investigate the nature of the two test items and their impact on the student’s performance. The data has proved that giving choice in an achievement test generates different performances that are assessed differently. It is recommended that in order to address the question of fairness, it is important to clearly define and balance the construct of the items that affect the student’s choice and performance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=achievement%20test" title="achievement test">achievement test</a>, <a href="https://publications.waset.org/abstracts/search?q=assessment" title=" assessment"> assessment</a>, <a href="https://publications.waset.org/abstracts/search?q=choice" title=" choice"> choice</a>, <a href="https://publications.waset.org/abstracts/search?q=fairness%20performance" title=" fairness performance"> fairness performance</a> </p> <a href="https://publications.waset.org/abstracts/76927/the-question-of-choice-in-an-achievement-test-a-study-on-the-sudanese-case" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76927.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">222</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">363</span> Stability of Concrete Moment Resisting Frames in View of Current Codes Requirements</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20A.%20Mahmoud">Mahmoud A. Mahmoud</a>, <a href="https://publications.waset.org/abstracts/search?q=Ashraf%20Osman"> Ashraf Osman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the different approaches currently followed by design codes to assess the stability of buildings utilizing concrete moment resisting frames structural system are evaluated. For such purpose, a parametric study was performed. It involved analyzing group of concrete moment resisting frames having different slenderness ratios (height/width ratios), designed for different lateral loads to vertical loads ratios and constructed using ordinary reinforced concrete and high strength concrete for stability check and overall buckling using code approaches and computer buckling analysis. The objectives were to examine the influence of such parameters that directly linked to frames’ lateral stiffness on the buildings’ stability and evaluates the code approach in view of buckling analysis results. Based on this study, it was concluded that, the most susceptible buildings to instability and magnification of second order effects are buildings having high aspect ratios (height/width ratio), having low lateral to vertical loads ratio and utilizing construction materials of high strength. In addition, the study showed that the instability limits imposed by codes are mainly mathematical to ensure reliable analysis not a physical ones and that they are in general conservative. Also, it has been shown that the upper limit set by one of the codes that second order moment for structural elements should be limited to 1.4 the first order moment is not justified, instead, the overall story check is more reliable. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=buckling" title="buckling">buckling</a>, <a href="https://publications.waset.org/abstracts/search?q=lateral%20stability" title=" lateral stability"> lateral stability</a>, <a href="https://publications.waset.org/abstracts/search?q=p-delta" title=" p-delta"> p-delta</a>, <a href="https://publications.waset.org/abstracts/search?q=second%20order" title=" second order"> second order</a> </p> <a href="https://publications.waset.org/abstracts/48608/stability-of-concrete-moment-resisting-frames-in-view-of-current-codes-requirements" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48608.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">256</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">362</span> Chemical Composition, in vitro Antioxidant Activity and Gas Chromatography–Mass Spectrometry Analysis of Essential Oil and Extracts of Ruta chalpensis aerial Parts Growing in Tunisian Sahara</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Samir%20Falhi">Samir Falhi</a>, <a href="https://publications.waset.org/abstracts/search?q=Neji%20Gharsallah"> Neji Gharsallah</a>, <a href="https://publications.waset.org/abstracts/search?q=Adel%20Kadri"> Adel Kadri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ruta chalpensis L. is a medicinal plant in the family of Rutaceae, has been used as an important traditional in the Mediterranean basin in the treatment of many diseases. The current study was devoted to investigate and evaluate the chemical composition, total phenolic, flavonoid and tannin contents, and in vitro antioxidant activities of ethyl acetate, ethanol and hydroalcoholic extracts and essential oil from the aerial parts of Ruta chalpensis from Tunisian Sahara. Total phenolic, flavonoid and tannin contents of extracts ranged from 40.39 ± 1.87 to 75.13 ± 1.22 mg of GAE/g, from 22.62 ± 1.55 to 27.51 ± 1.04 mg of QE/g, and from 5.56 ± 1.32 to 10.89 ± 1.10 mg of CE/g respectively. Results showed that the highest antioxidant activities was determined for ethanol extract with IC50 value of 26.23 ± 0.91 µg/mL for 2,2-diphenyl-1-picrylhydrazyl assay, and for hydroalcoholic extract with EC50 value of 412.95±6.57 µg/mL and 105.52±2.45 mg of α-tocopherol/g for ferric reducing antioxidant power and total antioxidant capacity assays, respectively. Furthermore, Gas Chromatography–Mass Spectrometry (GC-MS) analysis of essential oil led to identification of 20 compounds representing 98.96 % of the total composition. The major components of essential oil were 2-undecanone (39.13%), 2-nonanone (25.04), 1-nonene (13.81), and α-limonene (7.72). Spectral data of Fourier-transform infrared spectroscopy analysis (FT-IR) of extracts revealed the presence of functional groups such as C= O, C─O, ─OH, and C─H, which confirmed its richness on polyphenols and biological active functional groups. These results showed that Ruta chalpensis could be a potential natural source of antioxidants that can be used in food and nutraceutical applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidant" title="antioxidant">antioxidant</a>, <a href="https://publications.waset.org/abstracts/search?q=FT-IR%20analysis" title=" FT-IR analysis"> FT-IR analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=GC-MS%20analysis" title=" GC-MS analysis"> GC-MS analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=phytochemicals%20contents" title=" phytochemicals contents"> phytochemicals contents</a>, <a href="https://publications.waset.org/abstracts/search?q=Ruta%20chalpensis" title=" Ruta chalpensis"> Ruta chalpensis</a> </p> <a href="https://publications.waset.org/abstracts/95645/chemical-composition-in-vitro-antioxidant-activity-and-gas-chromatography-mass-spectrometry-analysis-of-essential-oil-and-extracts-of-ruta-chalpensis-aerial-parts-growing-in-tunisian-sahara" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/95645.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">147</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">361</span> Fake Accounts Detection in Twitter Based on Minimum Weighted Feature Set</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20ElAzab">Ahmed ElAzab</a>, <a href="https://publications.waset.org/abstracts/search?q=Amira%20M.%20Idrees"> Amira M. Idrees</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20A.%20Mahmoud"> Mahmoud A. Mahmoud</a>, <a href="https://publications.waset.org/abstracts/search?q=Hesham%20Hefny"> Hesham Hefny</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Social networking sites such as Twitter and Facebook attracts over 500 million users across the world, for those users, their social life, even their practical life, has become interrelated. Their interaction with social networking has affected their life forever. Accordingly, social networking sites have become among the main channels that are responsible for vast dissemination of different kinds of information during real time events. This popularity in Social networking has led to different problems including the possibility of exposing incorrect information to their users through fake accounts which results to the spread of malicious content during life events. This situation can result to a huge damage in the real world to the society in general including citizens, business entities, and others. In this paper, we present a classification method for detecting fake accounts on Twitter. The study determines the minimized set of the main factors that influence the detection of the fake accounts on Twitter, then the determined factors have been applied using different classification techniques, a comparison of the results for these techniques has been performed and the most accurate algorithm is selected according to the accuracy of the results. The study has been compared with different recent research in the same area, this comparison has proved the accuracy of the proposed study. We claim that this study can be continuously applied on Twitter social network to automatically detect the fake accounts, moreover, the study can be applied on different Social network sites such as Facebook with minor changes according to the nature of the social network which are discussed in this paper. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fake%20accounts%20detection" title="fake accounts detection">fake accounts detection</a>, <a href="https://publications.waset.org/abstracts/search?q=classification%20algorithms" title=" classification algorithms"> classification algorithms</a>, <a href="https://publications.waset.org/abstracts/search?q=twitter%20accounts%20analysis" title=" twitter accounts analysis"> twitter accounts analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=features%20based%20techniques" title=" features based techniques"> features based techniques</a> </p> <a href="https://publications.waset.org/abstracts/41564/fake-accounts-detection-in-twitter-based-on-minimum-weighted-feature-set" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41564.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">416</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">360</span> Evaluation of Gene Expression after in Vitro Differentiation of Human Bone Marrow-Derived Stem Cells to Insulin-Producing Cells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20M.%20Zakaria">Mahmoud M. Zakaria</a>, <a href="https://publications.waset.org/abstracts/search?q=Omnia%20F.%20Elmoursi"> Omnia F. Elmoursi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20M.%20Gabr"> Mahmoud M. Gabr</a>, <a href="https://publications.waset.org/abstracts/search?q=Camelia%20A.%20AbdelMalak"> Camelia A. AbdelMalak</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20A.%20Ghoneim"> Mohamed A. Ghoneim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many protocols were publicized for differentiation of human mesenchymal stem cells (MSCS) into insulin-producing cells (IPCs) in order to excrete insulin hormone ingoing to treat diabetes disease. Our aim is to evaluate relative gene expression for each independent protocol. Human bone marrow cells were derived from three volunteers that suffer diabetes disease. After expansion of mesenchymal stem cells, differentiation of these cells was done by three different protocols (the one-step protocol was used conophylline protein, the two steps protocol was depending on trichostatin-A, and the three-step protocol was started by beta-mercaptoethanol). Evaluation of gene expression was carried out by real-time PCR: Pancreatic endocrine genes, transcription factors, glucose transporter, precursor markers, pancreatic enzymes, proteolytic cleavage, extracellular matrix and cell surface protein. Quantitation of insulin secretion was detected by immunofluorescence technique in 24-well plate. Most of the genes studied were up-regulated in the in vitro differentiated cells, and also insulin production was observed in the three independent protocols. There were some slight increases in expression of endocrine mRNA of two-step protocol and its insulin production. So, the two-step protocol was showed a more efficient in expressing of pancreatic endocrine genes and its insulin production than the other two protocols. <p class="card-text"><strong>Keywords:</strong> <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=insulin%20producing%20cells" title=" insulin producing cells"> insulin producing cells</a>, <a href="https://publications.waset.org/abstracts/search?q=conophylline%20protein" title=" conophylline protein"> conophylline protein</a>, <a href="https://publications.waset.org/abstracts/search?q=trichostatin-A" title=" trichostatin-A"> trichostatin-A</a>, <a href="https://publications.waset.org/abstracts/search?q=beta-mercaptoethanol" title=" beta-mercaptoethanol"> beta-mercaptoethanol</a>, <a href="https://publications.waset.org/abstracts/search?q=gene%20expression" title=" gene expression"> gene expression</a>, <a href="https://publications.waset.org/abstracts/search?q=immunofluorescence%20technique" title=" immunofluorescence technique"> immunofluorescence technique</a> </p> <a href="https://publications.waset.org/abstracts/85954/evaluation-of-gene-expression-after-in-vitro-differentiation-of-human-bone-marrow-derived-stem-cells-to-insulin-producing-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/85954.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">215</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">359</span> The Diglossia and the Bilingualism: Concept, Problems, and Solutions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdou%20Mahmoud%20Abdou%20Hussein">Abdou Mahmoud Abdou Hussein </a> </p> <p class="card-text"><strong>Abstract:</strong></p> We attempt, in this paper, to spot the light on the difference between the two concepts (diglossia and bilingualism). Thus, we will show the definition of these two concepts among various perspectives. On the other hand, we will emphasize and highlight 'diglossa' in The Arabic language historically. Furthermore, we will illustrate the factors of the diglossia, the impact of diglossia on the learners of Arabic (native and non native speakers) and finally the suggested solutions for this issue. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arabic%20linguistics" title="Arabic linguistics">Arabic linguistics</a>, <a href="https://publications.waset.org/abstracts/search?q=diglossia" title=" diglossia"> diglossia</a>, <a href="https://publications.waset.org/abstracts/search?q=bilingualism" title=" bilingualism"> bilingualism</a>, <a href="https://publications.waset.org/abstracts/search?q=native%20and%20non-native%20speakers" title=" native and non-native speakers"> native and non-native speakers</a> </p> <a href="https://publications.waset.org/abstracts/1773/the-diglossia-and-the-bilingualism-concept-problems-and-solutions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1773.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">411</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">358</span> Sider Bee Honey: Antitumor Effect in Some Experimental Tumor Cell Lines</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aliaa%20M.%20Issa">Aliaa M. Issa</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20N.%20ElRouby"> Mahmoud N. ElRouby</a>, <a href="https://publications.waset.org/abstracts/search?q=Sahar%20A.%20S.%20Ahmad"> Sahar A. S. Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20M.%20El-Merzabani"> Mahmoud M. El-Merzabani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sider honey is a type of honey produced by bees feeding on the nectar of Sider tree, Ziziphus spina-christi (L) Desf . Honey is an effective agent for preventing, inhibiting and treating the growth of human and animal cancer cell lines in vitro and in vivo. The aim of the present study was to evaluate the impact of different dilutions from crude Sider honey and different duration times of exposure on the growth of six tumor cell lines (human cervical cancer cell line, HeLa; human hepatocellular carcinoma cell line, HepG-2; human larynx carcinoma cell line, Hep-2; brain tumor cell line, U251) as well as one animal cancerous cell line (Ehrlich ascites carcinoma cells line, EAC) and one normal cell line, Homo sapiens, human, (WISH) CCL-25. Different concentrations and treatment durations with Sider honey were tested on the growth of several cancer cell lines types. Histopathological changes in the tumor masses, animal survival, apoptosis and necrosis of the used cancer cell lines (using flow cytometry) were evaluated. Sider honey was administers either to the tumor mass itself by intratumoral injection or via drinking water. One-way ANOVA test was used for the analysis of (the means + standard error) of the optical density obtained from the Elisa reader and flow cytometry. The study revealed that different concentrations of Sider honey affected the growth patterns of all the studied cancer cell lines as well as their histopathological changes, and it depended on the cell line nature and the concentration of honey used. It is obvious that the relative animal survival percentage (bearing Ehrlich ascites carcinoma, EAC cells) was proportionally increased with the increase in the used honey concentrations. The study of apoptosis and necrosis using the flow cytometry technique emphasized the viability results. In conclusion, Sider honey was effective as antitumor agent, in the used concentrations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antitumor" title="antitumor">antitumor</a>, <a href="https://publications.waset.org/abstracts/search?q=honey" title=" honey"> honey</a>, <a href="https://publications.waset.org/abstracts/search?q=sider" title=" sider"> sider</a>, <a href="https://publications.waset.org/abstracts/search?q=tumor%20cell%20lines" title=" tumor cell lines"> tumor cell lines</a> </p> <a href="https://publications.waset.org/abstracts/41053/sider-bee-honey-antitumor-effect-in-some-experimental-tumor-cell-lines" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41053.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">537</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">357</span> Automatic Approach for Estimating the Protection Elements of Electric Power Plants</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Mohammad%20Salem%20Al-Suod">Mahmoud Mohammad Salem Al-Suod</a>, <a href="https://publications.waset.org/abstracts/search?q=Ushkarenko%20O.%20Alexander"> Ushkarenko O. Alexander</a>, <a href="https://publications.waset.org/abstracts/search?q=Dorogan%20I.%20Olga"> Dorogan I. Olga</a> </p> <p class="card-text"><strong>Abstract:</strong></p> New algorithms using microprocessor systems have been proposed for protection the diesel-generator unit in autonomous power systems. The software structure is designed to enhance the control automata of the system, in which every protection module of diesel-generator encapsulates the finite state machine. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=diesel-generator%20unit" title="diesel-generator unit">diesel-generator unit</a>, <a href="https://publications.waset.org/abstracts/search?q=protection" title=" protection"> protection</a>, <a href="https://publications.waset.org/abstracts/search?q=state%20diagram" title=" state diagram"> state diagram</a>, <a href="https://publications.waset.org/abstracts/search?q=control%20system" title=" control system"> control system</a>, <a href="https://publications.waset.org/abstracts/search?q=algorithm" title=" algorithm"> algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=software%20components" title=" software components"> software components</a> </p> <a href="https://publications.waset.org/abstracts/41588/automatic-approach-for-estimating-the-protection-elements-of-electric-power-plants" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41588.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">356</span> Developing Countries and the Entrepreneurial Intention of Postgraduates: A Study of Nigerian Postgraduates in UUM</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Ahmad%20Mahmoud">Mahmoud Ahmad Mahmoud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The surge in unemployment among nations and the understanding of the important role played by entrepreneurship in job creation by researchers and policy makers have steered to the postulation that entrepreneurship activities can be spurred through the development of entrepreneurial intentions. Notwithstanding, entrepreneurial intention studies are very scarce in the developing world especially in the African continent. Even among the developed countries, studies of entrepreneurial intention were mostly focused on the undergraduate candidates. This paper therefore, aimed at filling the gap by employing the descriptive quantitative survey method to examine the entrepreneurial intention of 158 Nigerian postgraduate candidates of Universiti Utara Malaysia (UUM), comprising 46 Masters and 112 PhD candidates who are studying in the College of Business (COB), College of Arts and Sciences (CAS) and College of Legal, Government and International Studies (COLGIS), the theory of planned behaviour (TPB) model was used due its reputable validity, with attitudes, subjective norms and perceived behavioural control as the independent variables. Preliminary analysis and data screening were conducted which qualifies the data to the multivariate analysis assumptions. The reliability test was performed using the Cronbach Alpha method which shows all variables as reliable with a value of >0.70. However, the data is free from the multicollinearity issue with all factors in the Pearson correlation having <0.9 value and the VIF having <10. Regression analysis has shown the sufficiency and predictive capability of the TPB model to entrepreneurship intention with attitude, subjective norms and perceived behavioural control being positively and significantly related to the entrepreneurial intention of Nigerian postgraduates. Considering the Beta values, perceived behavioural control emerged as the strongest factor that influences the postgraduates entrepreneurial intention. Developing countries are therefore, recommended to make efforts in redesigning their entrepreneurship development policies to fit candidates of the highest level of academia. Further studies should replicate in a larger sample that comprises more than one university and more than one developing country. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=attitude" title="attitude">attitude</a>, <a href="https://publications.waset.org/abstracts/search?q=entrepreneurial%20intention" title=" entrepreneurial intention"> entrepreneurial intention</a>, <a href="https://publications.waset.org/abstracts/search?q=Nigeria" title=" Nigeria"> Nigeria</a>, <a href="https://publications.waset.org/abstracts/search?q=perceived%20behavioral%20control" title=" perceived behavioral control"> perceived behavioral control</a>, <a href="https://publications.waset.org/abstracts/search?q=postgraduates" title=" postgraduates"> postgraduates</a>, <a href="https://publications.waset.org/abstracts/search?q=subjective%20norms" title=" subjective norms"> subjective norms</a> </p> <a href="https://publications.waset.org/abstracts/24068/developing-countries-and-the-entrepreneurial-intention-of-postgraduates-a-study-of-nigerian-postgraduates-in-uum" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24068.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">433</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">355</span> Management of Recurrent Temporomandibular Joint True Bony Ankylosis : A Case Report</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20A.%20Amin">Mahmoud A. Amin</a>, <a href="https://publications.waset.org/abstracts/search?q=Essam%20Taman"> Essam Taman</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Omran"> Ahmed Omran</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Shawky"> Mahmoud Shawky</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Mekawy"> Ahmed Mekawy</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdallah%20M.%20Kotkat"> Abdallah M. Kotkat</a>, <a href="https://publications.waset.org/abstracts/search?q=Saber%20Younes"> Saber Younes</a>, <a href="https://publications.waset.org/abstracts/search?q=Nehad%20N.%20Ghonemy"> Nehad N. Ghonemy</a>, <a href="https://publications.waset.org/abstracts/search?q=Amin%20Saad"> Amin Saad</a>, <a href="https://publications.waset.org/abstracts/search?q=Ezz-Aleslam"> Ezz-Aleslam</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdullah%20M.%20Elosh"> Abdullah M. Elosh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: TMJ is a one-of-a-kind, complicated synovial joint that helps with masticatory function by allowing the mandible to open and close the mouth. True ankylosis is a situation in which condylar movement is limited by a mechanical defect in the joint, whereas false ankylosis is a condition in which there is a restriction in mandibular movement due to muscular spasm myositis ossificans, and coronoid process hyperplasia. Ankylosis is characterized by the inability to open the mouth due to fusion of the TMJ condyle to the base of the skull as a result of trauma, infection, or systemic diseases such as rheumatoid arthritis (the most common) and psoraisis. Ankylosis causes facial asymmetry and affects the patient psychologically as well as speech, difficult mastication, poor oral hygiene, malocclusion, and other factors. TMJ is a technically challenging joint; hence TMJ ankylosis management is complicated. Case presentation: this case is a male patient 25 years old reported to our maxillofacial clinic in Damietta faculty of medicine, Al-Azhar University with the inability to open the mouth at all, with a history of difficulty of mouth breathing and eating foods, there was a history of falling from height at 2006, and the patient underwent corrective surgery before with no improvement because the ankylosis was relapsed short period after the previous operations with that done out of our hospital inter-incisor distant ZERO so, this condition need mandatory management. Clinical examination and radiological investigations were done after complete approval from the patient and his brother; tracheostomy was done for our patient before the operation. The patient entered the operation in our hospital and drastic improvement in mouth opening was noticed, helping to restore the physical psychological health of the patient. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=temporomandibular%20joint" title="temporomandibular joint">temporomandibular joint</a>, <a href="https://publications.waset.org/abstracts/search?q=TMJ" title=" TMJ"> TMJ</a>, <a href="https://publications.waset.org/abstracts/search?q=Ankylosis" title=" Ankylosis"> Ankylosis</a>, <a href="https://publications.waset.org/abstracts/search?q=mouth%20opening" title=" mouth opening"> mouth opening</a>, <a href="https://publications.waset.org/abstracts/search?q=physiotherapy" title=" physiotherapy"> physiotherapy</a>, <a href="https://publications.waset.org/abstracts/search?q=condylar%20plate" title=" condylar plate"> condylar plate</a> </p> <a href="https://publications.waset.org/abstracts/146929/management-of-recurrent-temporomandibular-joint-true-bony-ankylosis-a-case-report" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/146929.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">354</span> A Conceptual Study for Investigating the Preliminary State of Energy at the Birth of Universe and Understanding Its Emergence From the State of Nothing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Reza%20Hosseini">Mahmoud Reza Hosseini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, a comprehensive energy model is proposed and utilized to study the birth of universe from the state of nothing. The state of nothing main specification is introduced and its role in the creation of universe is studied. In addition, the current research work provides a different approach to some of the ongoing paradox in cosmology such as the singularity at the beginning of big bang, and the expansion of universe at an accelerated rate. Also, the possible mechanism responsible for the creation of space-time domain is investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=big%20bang" title="big bang">big bang</a>, <a href="https://publications.waset.org/abstracts/search?q=cosmic%20inflation" title=" cosmic inflation"> cosmic inflation</a>, <a href="https://publications.waset.org/abstracts/search?q=birth%20of%20universe" title=" birth of universe"> birth of universe</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20creation" title=" energy creation"> energy creation</a>, <a href="https://publications.waset.org/abstracts/search?q=universe%20evolution" title=" universe evolution"> universe evolution</a> </p> <a href="https://publications.waset.org/abstracts/185940/a-conceptual-study-for-investigating-the-preliminary-state-of-energy-at-the-birth-of-universe-and-understanding-its-emergence-from-the-state-of-nothing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185940.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">50</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">353</span> Flux-Linkage Performance of DFIG Under Different Types of Faults and Locations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Moustafa%20Mahmoud%20Sedky">Mohamed Moustafa Mahmoud Sedky</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The double-fed induction generator wind turbine has recently received a great attention. The steady state performance and response of double fed induction generator (DFIG) based wind turbine are now well understood. This paper presents the analysis of stator and rotor flux linkage dq models operation of DFIG under different faults and at different locations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=double%20fed%20induction%20motor" title="double fed induction motor">double fed induction motor</a>, <a href="https://publications.waset.org/abstracts/search?q=wind%20energy" title=" wind energy"> wind energy</a>, <a href="https://publications.waset.org/abstracts/search?q=flux%20linkage" title=" flux linkage"> flux linkage</a>, <a href="https://publications.waset.org/abstracts/search?q=short%20circuit" title=" short circuit"> short circuit</a> </p> <a href="https://publications.waset.org/abstracts/27816/flux-linkage-performance-of-dfig-under-different-types-of-faults-and-locations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27816.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">517</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">352</span> Synthesis, Characterization and Applications of Novel Hydrogels Based On Chitosan Derivatives</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20H.%20Aboul-Ela">Mahmoud H. Aboul-Ela</a>, <a href="https://publications.waset.org/abstracts/search?q=Riham%20R.%20Mohamed"> Riham R. Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Magdy%20W.%20Sabaa"> Magdy W. Sabaa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Synthesis of cross-linked hydrogels composed of trimethyl chitosan (TMC) and poly(vinyl alcohol) (PVA) in different weight ratios in presence of glutaraldehyde as cross-linking agent. Characterization of the prepared hydrogels was done using FTIR, XRD, SEM and TGA. The prepared hydrogels were investigated as adsorbent materials for some transition metal ions from their aqueous solutions. Moreover, the swell ability of the prepared hydrogels was also investigated in both acidic and alkaline pHs, as well as in simulated body fluid (SBF). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=trimethyl%20chitosan" title="trimethyl chitosan">trimethyl chitosan</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogels" title=" hydrogels"> hydrogels</a>, <a href="https://publications.waset.org/abstracts/search?q=metal%20uptake" title=" metal uptake"> metal uptake</a>, <a href="https://publications.waset.org/abstracts/search?q=superabsorbent%20materials" title=" superabsorbent materials "> superabsorbent materials </a> </p> <a href="https://publications.waset.org/abstracts/15018/synthesis-characterization-and-applications-of-novel-hydrogels-based-on-chitosan-derivatives" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15018.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">391</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">351</span> Spectroscopic Constant Calculation of the BeF Molecule </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nayla%20El-Kork">Nayla El-Kork</a>, <a href="https://publications.waset.org/abstracts/search?q=Farah%20Korjieh"> Farah Korjieh</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Bentiba"> Ahmed Bentiba</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Korek"> Mahmoud Korek</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ab-initio calculations have been performed to investigate the spectroscopic constants for the diatomic compound BeF. Values of the internuclear distance Re, the harmonic frequency ωe, the rotational constants Be, the electronic transition energy with respect to the ground state Te, the eignvalues Ev, the abscissas of the turning points Rmin, Rmax, the rotational constants Bv and the centrifugal distortion constants Dv have been calculated for the molecule’s ground and excited electronic states. Results are in agreement with experimental data. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=spectroscopic%20constant" title="spectroscopic constant">spectroscopic constant</a>, <a href="https://publications.waset.org/abstracts/search?q=potential%20energy%20curve" title=" potential energy curve"> potential energy curve</a>, <a href="https://publications.waset.org/abstracts/search?q=diatomic%20molecule" title=" diatomic molecule"> diatomic molecule</a>, <a href="https://publications.waset.org/abstracts/search?q=spectral%20analysis" title=" spectral analysis"> spectral analysis</a> </p> <a href="https://publications.waset.org/abstracts/28671/spectroscopic-constant-calculation-of-the-bef-molecule" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28671.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">569</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">350</span> Eco-Biological Study of Artemia salina (Branchiopoda, Anostraca) in Sahline Salt Lake, Tunisia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khalil%20Trigui">Khalil Trigui</a>, <a href="https://publications.waset.org/abstracts/search?q=Rafik%20Ben%20Said"> Rafik Ben Said</a>, <a href="https://publications.waset.org/abstracts/search?q=Fourat%20Akrout"> Fourat Akrout</a>, <a href="https://publications.waset.org/abstracts/search?q=Neji%20Aloui"> Neji Aloui</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, we examined in the first part the eco-biology of Artemia (A.salina) collected from Sahline Salt Lake (governorate of Monastir: Tunisia) during an annual cycle. The correlations between environmental factors and some biological parameters of Artemia were determined. The results obtained showed that the environmental factors affected the biology of Artemia. The highest abundance was recorded in May (550 ± 2,16 ind/l) and all life history stages existed with different seasonal proportions. The Artemia population is bisexual with ovoviviparous reproduction at the beginning and oviparous at the end of the life cycle. We also recorded the dominance of males at the start and the females at the end of the cycle. During all the study period, the size of mature females is bigger than that of males. The fertility obtained resulted in a significant production of cysts compared to the nauplii. A negative correlation with highly significant effect was deduced between environmental factors (temperature and salinity) and the production of nauplii (ovoviviparity) in contrast with dissolved oxygen. In the second part of our work is consecrated to the mastery of breeding Artemia. For this, we tested the effect of five external factors (temperature, salinity, dissolved oxygen, light intensity and food) on the survival of this crustacean. Thereby, the survival rates of Artemia were affected by the different values of studied factors. The recorded results showed that Artemia salina has an optimum temperature ranged from 25 to 27°C with a survival rate ranging from 84 to 88%. The optimal salinity to breed Artemia salina was 37 psu (62 ± 0,23%). Nevertheless, this crustacean was able to survive and withstand the salinity of 0 psu (freshwater). The optimum concentration of dissolved oxygen was 7mg/l with a survival rate of 87,11 ± 0,04%. An optimum light intensity of 10 lux revealed a survival rate equal to 85,33 ± 0,01%. The results also showed that the preferred micro-algae by Artemia is Dunaliella salina with a maximum survival rate of the order of 80 ± 0,15%. There is a significant effect for all experienced parameters on the survival of Artemia reared except the nature of food. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Artemia%20salina" title="Artemia salina">Artemia salina</a>, <a href="https://publications.waset.org/abstracts/search?q=biology" title=" biology"> biology</a>, <a href="https://publications.waset.org/abstracts/search?q=breeding" title=" breeding"> breeding</a>, <a href="https://publications.waset.org/abstracts/search?q=ecology" title=" ecology"> ecology</a>, <a href="https://publications.waset.org/abstracts/search?q=Sahline%20salt%20lake" title=" Sahline salt lake"> Sahline salt lake</a> </p> <a href="https://publications.waset.org/abstracts/75774/eco-biological-study-of-artemia-salina-branchiopoda-anostraca-in-sahline-salt-lake-tunisia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75774.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">349</span> Analysis of Flux-Linkage Performance of DFIG by Using Simulink under Different Types of Faults and Locations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Moustafa%20Mahmoud%20Sedky">Mohamed Moustafa Mahmoud Sedky</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The double-fed induction generator wind turbine has recently received a great attention. The steady state performance and response of double fed induction generator (DFIG) based wind turbine are now well understood. This paper presents the analysis of stator and rotor flux linkage dq models operation of DFIG under different faults and at different locations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=double%20fed%20induction%20motor" title="double fed induction motor">double fed induction motor</a>, <a href="https://publications.waset.org/abstracts/search?q=wind%20energy" title=" wind energy"> wind energy</a>, <a href="https://publications.waset.org/abstracts/search?q=flux%20linkage" title=" flux linkage"> flux linkage</a>, <a href="https://publications.waset.org/abstracts/search?q=short%20circuit" title=" short circuit "> short circuit </a> </p> <a href="https://publications.waset.org/abstracts/27818/analysis-of-flux-linkage-performance-of-dfig-by-using-simulink-under-different-types-of-faults-and-locations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27818.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">588</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">348</span> Insulin-Producing Cells from Adult Human Bone Marrow Mesenchymal Stem Cells Control Chemically-Induced Diabetes in Dogs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maha%20Azzam">Maha Azzam</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Gabr"> Mahmoud Gabr</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Zakaria"> Mahmoud Zakaria</a>, <a href="https://publications.waset.org/abstracts/search?q=Ayman%20Refaie"> Ayman Refaie</a>, <a href="https://publications.waset.org/abstracts/search?q=Amani%20Ismail"> Amani Ismail</a>, <a href="https://publications.waset.org/abstracts/search?q=Sherry%20Khater"> Sherry Khater</a>, <a href="https://publications.waset.org/abstracts/search?q=Sylvia%20Ashamallah"> Sylvia Ashamallah</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Ghoniem"> Mohamed Ghoniem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Evidence was provided that human bone marrow-derived mesenhymal stem cells (HBM-MSCs) could be differentiated to form insulin-producing cells (IPCs). Transplantation of these cells was able to cure chemically-induced diabetes in nude mice. The efficacy of these cells to control diabetes in large animals was carried out to evaluate the sufficient number of cells needed/Kg body weight and to determine the functional longevity in vivo. Materials/Methods: Ten male mongrel dogs weighing 15-20 Kg were used in this study. Diabetes was chemically-induced in 7 dogs by a mixture of alloxan and streptozotocin. Three non-diabetic served as normal controls. Differentiated HBM-MSCs (5 million/Kg) were encapsulated in theracyte capsules and transplanted beneath the rectus sheath. Each dog received 2 capsules. One dog died 4 days postoperative from inhalation pneumonia. The remaining 6 dogs were followed up for 6-18 months. Results: Four dogs became normoglycemic within 6-8 weeks with normal glucose tolerance curves providing evidence that the transplanted cells were glucose-sensitive and insulin-responsive. In the remaining 2 dogs, fasting blood glucose was reduced but did not reach euglycemic levels. The sera of all transplanted dogs contained human insulin and c-peptide but negligible levels of canine insulin. When the HBM-MSCs loaded capsules were removed, rapid return of diabetic state was noted. The harvested capsules were examined by immunofluorescence. IPCs were seen and co-expression of with c-peptide was confirmed. Furthermore, all the pancreatic endocrine genes were expressed by the transplanted cells. Conclusions: This study provided evidence that theracyte capsules could protect the xenogenic HBM-MSCs from the host immune response. This is an important issue when clinical stem cell therapy is considered for definitive treatment for T1DM. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=diabetes" title="diabetes">diabetes</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=dogs" title=" dogs"> dogs</a>, <a href="https://publications.waset.org/abstracts/search?q=Insulin-producing%20cells" title=" Insulin-producing cells"> Insulin-producing cells</a> </p> <a href="https://publications.waset.org/abstracts/87992/insulin-producing-cells-from-adult-human-bone-marrow-mesenchymal-stem-cells-control-chemically-induced-diabetes-in-dogs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87992.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">204</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">347</span> Dermatophytoses: Spectrum Evolution of Dermatophytes in Sfax, Tunisia, Between 1999 and 2019</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khemakhem%20Nahed">Khemakhem Nahed</a>, <a href="https://publications.waset.org/abstracts/search?q=Hammami%20Fatma"> Hammami Fatma</a>, <a href="https://publications.waset.org/abstracts/search?q=Trabelsi%20Houaida">Trabelsi Houaida</a>, <a href="https://publications.waset.org/abstracts/search?q=Neji%20Sourour"> Neji Sourour</a>, <a href="https://publications.waset.org/abstracts/search?q=Sellami%20Hayet"> Sellami Hayet</a>, <a href="https://publications.waset.org/abstracts/search?q=Makni%20Fattouma"> Makni Fattouma</a>, <a href="https://publications.waset.org/abstracts/search?q=Turki%20Hamida">Turki Hamida</a>, <a href="https://publications.waset.org/abstracts/search?q=Ayadi%20Ali"> Ayadi Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dermatophytoses are considered a public health problem and represent 10% of dermatological consultations in our region. Their epidemiology is influenced by various factors, such as lifestyle, human migration patterns, changes in the environment and the host relationship. The understanding of epidemiology has a major impact on their prevention and treatment. The aim of the study is to determine the prevalence pattern of aetiological agents and to describe the clinical characteristics of dermatophytoses between 1999 and 2019. Out of 65 059 subjects suspected to have superficial mycoses, 36 220 (55.67%) were affected with dermatophytoses. The mean age was 40.1 years (range: 10 days to 99 years). The sex ratio was 0.8. Our patients were from urban regions in 80.9% of cases. The most common type of infection was onychomycosis (42.64%), followed by tinea pedis (20.8%), intertrigo (18.3%), tinea corporis (8.48%) and tinea capitis (7.87%). The most isolated dermatophyte was Trichophyton rubrum (76.5%), followed by T. mentagrophytes complex (6.3%), Microsporum canis (5.8%), T. violaceum (5.3%), T. verrucosum (0.83%) and Epidermophyton floccosum (0.3%). Zoophilic agents have become more prevalent and their frequency has been increased from 6.46% in 1999 to 13% in 2019. It is interesting to note that M. canis has been on the rise since 2010 and it was the first etiological agent of tinea capitis (48%), while infections caused by T. violaceum continued to decrease from 1999 (16.2%) to 2019 (4.7%). Other dermatophytes have been rarely isolated: T. tonsurans (9 cases), T. schoenleinii (3 cases), T. soudanense (2 cases), M. fulvum (1 case), M. audouinii (1 case) and M. ferrugineum (2 cases).T. mentagrophytes var. quinckeanum was isolated from an inflammatory tinea capitis lesion in an a-3-year-old girl. T. mentagrophytes var. erinacei was isolated from the first case of tinea manuum, in-a-10-year-old girl. The same fungus was isolated from the hair and scales of the hedgehog. Our study showed significant changes in the dermatophytes spectrum in our region. The prevalence of zoophilic species increased in recent years due to people's behavioral changes with the adoption of pets and animal husbandry in urban settings. Molecular methods are often crucial that help us to refine the identification strains of dermatophytes and to identify their origin of the contamination. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dermatophytoses" title="dermatophytoses">dermatophytoses</a>, <a href="https://publications.waset.org/abstracts/search?q=PCR-sequencing" title=" PCR-sequencing"> PCR-sequencing</a>, <a href="https://publications.waset.org/abstracts/search?q=spectrum" title=" spectrum"> spectrum</a>, <a href="https://publications.waset.org/abstracts/search?q=Sfax" title=" Sfax"> Sfax</a>, <a href="https://publications.waset.org/abstracts/search?q=Tunisia" title=" Tunisia"> Tunisia</a> </p> <a href="https://publications.waset.org/abstracts/148171/dermatophytoses-spectrum-evolution-of-dermatophytes-in-sfax-tunisia-between-1999-and-2019" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/148171.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">113</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">346</span> Preparation of Sorbent Materials for the Removal of Hardness and Organic Pollutants from Water and Wastewater</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Thanaa%20Abdel%20Moghny">Thanaa Abdel Moghny</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Keshawy"> Mohamed Keshawy</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Fathy"> Mahmoud Fathy</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdul-Raheim%20M.%20Abdul-Raheim"> Abdul-Raheim M. Abdul-Raheim</a>, <a href="https://publications.waset.org/abstracts/search?q=Khalid%20I.%20Kabel"> Khalid I. Kabel</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20F.%20El-Kafrawy"> Ahmed F. El-Kafrawy</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Ahmed%20Mousa"> Mahmoud Ahmed Mousa</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20E.%20Awadallah"> Ahmed E. Awadallah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ecological pollution is of great concern for human health and the environment. Numerous organic and inorganic pollutants usually discharged into the water caused carcinogenic or toxic effect for human and different life form. In this respect, this work aims to treat water contaminated by organic and inorganic waste using sorbent based on polystyrene. Therefore, two different series of adsorbent material were prepared; the first one included the preparation of polymeric sorbent from the reaction of styrene acrylate ester and alkyl acrylate. The second series involved syntheses of composite ion exchange resins of waste polystyrene and   amorphous carbon thin film (WPS/ACTF) by solvent evaporation using micro emulsion polymerization. The produced ACTF/WPS nanocomposite was sulfonated to produce cation exchange resins ACTF/WPSS nanocomposite. The sorbents of the first series were characterized using FTIR, <sup>1</sup>H NMR, and gel permeation chromatography. The thermal properties of the cross-linked sorbents were investigated using thermogravimetric analysis, and the morphology was characterized by scanning electron microscope (SEM). The removal of organic pollutant was determined through absorption tests in a various organic solvent. The chemical and crystalline structure of nanocomposite of second series has been proven by studies of FTIR spectrum, X-rays, thermal analysis, SEM and TEM analysis to study morphology of resins and ACTF that assembled with polystyrene chain. It is found that the composite resins ACTF/WPSS are thermally stable and show higher chemical stability than ion exchange WPSS resins. The composite resin was evaluated for calcium hardness removal. The result is evident that the ACTF/WPSS composite has more prominent inorganic pollutant removal than WPSS resin. So, we recommend the using of nanocomposite resin as new potential applications for water treatment process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanocomposite" title="nanocomposite">nanocomposite</a>, <a href="https://publications.waset.org/abstracts/search?q=sorbent%20materials" title=" sorbent materials"> sorbent materials</a>, <a href="https://publications.waset.org/abstracts/search?q=waste%20water" title=" waste water"> waste water</a>, <a href="https://publications.waset.org/abstracts/search?q=waste%20polystyrene" title=" waste polystyrene"> waste polystyrene</a> </p> <a href="https://publications.waset.org/abstracts/71457/preparation-of-sorbent-materials-for-the-removal-of-hardness-and-organic-pollutants-from-water-and-wastewater" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71457.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">429</span> </span> </div> </div> <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=Mahmoud%20Neji&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=5">5</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=6">6</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=7">7</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=8">8</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=9">9</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=10">10</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=11">11</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=12">12</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Neji&page=13">13</a></li> <li class="page-item"><a class="page-link" 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