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Maleki</title> <meta name="description" content="Search results for: Davoud Maleki"> <meta name="keywords" content="Davoud Maleki"> <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="Davoud Maleki"> <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> 31</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Davoud Maleki</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">31</span> Designing an Effective Accountability Model for Islamic Azad University Using the Qualitative Approach of Grounded Theory</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Maleki">Davoud Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Neda%20Zamani"> Neda Zamani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study aims at exploring the effective accountability model of Islamic Azad University using a qualitative approach of grounded theory. The data of this study were obtained from semi-structured interviews with 25 professors and scholars in Islamic Azad University of Tehran who were selected by theoretical sampling method. In the data analysis, the stepwise method and Strauss and Corbin analytical methods (1992) were used. After identification of the main component (balanced response to stakeholders’ needs) and using it to bring the categories together, expressions and ideas representing the relationships between the main and subcomponents, and finally, the revealed components were categorized into six dimensions of the paradigm model, with the relationships among them, including causal conditions (7 components), main component (balanced response to stakeholders’ needs), strategies (5 components), environmental conditions (5 components), intervention features (4 components), and consequences (3 components). Research findings show an exploratory model for describing the relationships between causal conditions, main components, accountability strategies, environmental conditions, university environmental features, and that consequences. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=accountability" title="accountability">accountability</a>, <a href="https://publications.waset.org/abstracts/search?q=effectiveness" title=" effectiveness"> effectiveness</a>, <a href="https://publications.waset.org/abstracts/search?q=Islamic%20Azad%20University" title=" Islamic Azad University"> Islamic Azad University</a>, <a href="https://publications.waset.org/abstracts/search?q=grounded%20theory" title=" grounded theory"> grounded theory</a> </p> <a href="https://publications.waset.org/abstracts/169190/designing-an-effective-accountability-model-for-islamic-azad-university-using-the-qualitative-approach-of-grounded-theory" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/169190.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">86</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">30</span> Investigating Effective Factors on the Organizational Pathology of Knowledge Production in Islamic Azad University</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Maleki">Davoud Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Neda%20Zamani"> Neda Zamani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this research was to investigate the factors affecting the organizational pathology of knowledge production in Islamic Azad University. The present research method is quantitative. It was a survey type and applied research in terms of its purpose. The statistical population of the present study included all full-time professors of the Islamic Azad Universities in the North, South, East, West and Central regions, including the Islamic Azad Universities of Sari, Isfahan, Kerman, Khorramabad and Shiraz, and their total number was 1389, based on the Cochran formula. 305 people were selected as the sample size by random sampling method. The research tool was a researcher-made questionnaire, whose validity was calculated from the professors' point of view and its reliability was calculated based on Cronbach's alpha and was 0.89. For data analysis, confirmatory factor analysis and structural equations were used with Smart3 Pls software. The findings showed that the variables of strategy, structure and process directly and the variable of strategy explained indirectly through the variables of structure and process 96.8% of the pathology of knowledge production. Also, structure 49.6% and process variable 58.4% explain the pathology of knowledge production. 38% of knowledge production changes related to the direct effect of strategy, 39% of knowledge production changes Related to the effect of structure, 32% of the changes in knowledge production are related to the direct effect of the process, 70.5% of the changes related to the structure are related to the direct effect of the strategy, 36.5% of the changes related to the process are related to the direct effect of the strategy, 46.3 Percentage of process variable changes It is related to the direct effect of the structure. According to the obtained results, it can be acknowledged that the pathology model of knowledge production in Islamic Azad University can be used as an effective model in the pathology of knowledge production and can improve the scientific level of knowledge producers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pathology%20of%20knowledge%20production" title="pathology of knowledge production">pathology of knowledge production</a>, <a href="https://publications.waset.org/abstracts/search?q=strategic%20issues" title=" strategic issues"> strategic issues</a>, <a href="https://publications.waset.org/abstracts/search?q=process%20issues" title=" process issues"> process issues</a>, <a href="https://publications.waset.org/abstracts/search?q=Islamic%20Azad%20University" title=" Islamic Azad University"> Islamic Azad University</a> </p> <a href="https://publications.waset.org/abstracts/192187/investigating-effective-factors-on-the-organizational-pathology-of-knowledge-production-in-islamic-azad-university" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192187.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">18</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">29</span> Determine Causal Factors Affecting the Responsiveness and Productivity of Non-Governmental Universities</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Maleki">Davoud Maleki</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Today, education and investment in human capital is a long-term investment without which the economy will be stagnant Stayed. Higher education represents a type of investment in human resources by providing and improving knowledge, skills and Attitudes help economic development. Providing efficient human resources by increasing the efficiency and productivity of people and on the other hand with Expanding the boundaries of knowledge and technology and promoting technology such as the responsibility of training human resources and increasing productivity and efficiency in High specialized levels are the responsibility of universities. Therefore, the university plays an infrastructural role in economic development and growth because education by creating skills and expertise in people and improving their ability.In recent decades, Iran's higher education system has been faced with many problems, therefore, scholars have looked for it is to identify and validate the causal factors affecting the responsiveness and productivity of non-governmental universities. The data in the qualitative part is the result of semi-structured interviews with 25 senior and middle managers working in the units It was Islamic Azad University of Tehran province, which was selected by theoretical sampling method. In data analysis, stepwise method and Analytical techniques of Strauss and Corbin (1992) were used. After determining the central category (answering for the sake of the beneficiaries) and using it in order to bring the categories, expressions and ideas that express the relationships between the main categories and In the end, six main categories were identified as causal factors affecting the university's responsiveness and productivity.They are: 1- Scientism 2- Human resources 3- Creating motivation in the university 4- Development based on needs assessment 5- Teaching process and Learning 6- University quality evaluation. In order to validate the response model obtained from the qualitative stage, a questionnaire The questionnaire was prepared and the answers of 146 students of Master's degree and Doctorate of Islamic Azad University located in Tehran province were received. Quantitative data in the form of descriptive data analysis, first and second stage factor analysis using SPSS and Amos23 software were analyzed. The findings of the research indicated the relationship between the central category and the causal factors affecting the response The results of the model test in the quantitative stage confirmed the generality of the conceptual model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=accountability" title="accountability">accountability</a>, <a href="https://publications.waset.org/abstracts/search?q=productivity" title=" productivity"> productivity</a>, <a href="https://publications.waset.org/abstracts/search?q=non-governmental" title=" non-governmental"> non-governmental</a>, <a href="https://publications.waset.org/abstracts/search?q=universities" title=" universities"> universities</a>, <a href="https://publications.waset.org/abstracts/search?q=foundation%20data%20theory" title=" foundation data theory"> foundation data theory</a> </p> <a href="https://publications.waset.org/abstracts/184306/determine-causal-factors-affecting-the-responsiveness-and-productivity-of-non-governmental-universities" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/184306.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">59</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">28</span> Effectiveness of Working Memory Training on Cognitive Flexibility</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Leila%20Maleki">Leila Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Ezatollah%20Ahmadi"> Ezatollah Ahmadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study was to investigate the effectiveness of memory training exercise on cognitive flexibility. The method of this study was experimental. The statistical population selected 40 students 14 years old, samples were chosen by available sampling method and then they were replaced in experimental (training program) group and control group randomly and answered to Wisconsin Card Sorting Test; covariance test results indicated that there were a significant in post-test scores of experimental group (p<0.005). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cognitive%20flexibility" title="cognitive flexibility">cognitive flexibility</a>, <a href="https://publications.waset.org/abstracts/search?q=working%20memory%20exercises" title=" working memory exercises"> working memory exercises</a>, <a href="https://publications.waset.org/abstracts/search?q=problem%20solving" title=" problem solving"> problem solving</a>, <a href="https://publications.waset.org/abstracts/search?q=reaction%20time" title=" reaction time"> reaction time</a> </p> <a href="https://publications.waset.org/abstracts/36509/effectiveness-of-working-memory-training-on-cognitive-flexibility" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36509.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">424</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">27</span> Background Knowledge and Reading Comprehension in ELT Classes: A Pedagogical Perspective</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Ansari%20Kejal">Davoud Ansari Kejal</a>, <a href="https://publications.waset.org/abstracts/search?q=Meysam%20Sabour"> Meysam Sabour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> For long, there has been a belief that a reader can easily comprehend a text if he is strong enough in vocabulary and grammatical knowledge but there was no account for the ability of understanding different subjects based on readers’ understanding of the surrounding world which is called world background knowledge. This paper attempts to investigate the reading comprehension process applying the schema theory as an influential factor in comprehending texts, in order to prove the important role of background knowledge in reading comprehension. Based on the discussion, some teaching methods are suggested for employing world background knowledge for an elaborated teaching of reading comprehension in an active learning environment in EFL classes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=background%20knowledge" title="background knowledge">background knowledge</a>, <a href="https://publications.waset.org/abstracts/search?q=reading%20comprehension" title=" reading comprehension"> reading comprehension</a>, <a href="https://publications.waset.org/abstracts/search?q=schema%20theory" title=" schema theory"> schema theory</a>, <a href="https://publications.waset.org/abstracts/search?q=ELT%20classes" title=" ELT classes"> ELT classes</a> </p> <a href="https://publications.waset.org/abstracts/6277/background-knowledge-and-reading-comprehension-in-elt-classes-a-pedagogical-perspective" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6277.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">456</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">26</span> A Review of Self-Healing Concrete and Various Methods of Its Scientific Implementation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Beheshtizadeh">Davoud Beheshtizadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Davood%20Jafari"> Davood Jafari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Concrete, with its special properties and advantages, has caused it to be widely and increasingly used in construction industry, especially in infrastructures of the country. On the other hand, some defects of concrete and, most importantly, micro-cracks in the concrete after setting have caused the cost of repair and maintenance of infrastructure; therefore, self-healing concretes have been of attention in other countries in the recent years. These concretes have been repaired with general mechanisms such as physical, chemical, biological and combined mechanisms, each of which has different subsets and methods of execution and operation. Also, some of these types of mechanisms are of high importance, which has led to a special production method, and as this subject is new in Iran, this knowledge is almost unknown or at least some part of it has not been considered at all. The present article completely introduces various self-healing mechanisms as a review and tries to present the disadvantages and advantages of each method along with its scope of application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=micro-cracks" title="micro-cracks">micro-cracks</a>, <a href="https://publications.waset.org/abstracts/search?q=self-healing%20concrete" title=" self-healing concrete"> self-healing concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=microcapsules" title=" microcapsules"> microcapsules</a>, <a href="https://publications.waset.org/abstracts/search?q=concrete" title=" concrete"> concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=cement" title=" cement"> cement</a>, <a href="https://publications.waset.org/abstracts/search?q=self-sensitive" title=" self-sensitive"> self-sensitive</a> </p> <a href="https://publications.waset.org/abstracts/166936/a-review-of-self-healing-concrete-and-various-methods-of-its-scientific-implementation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166936.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">144</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25</span> Neuroplasticity: A Fresh Begining for Life</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Leila%20Maleki">Leila Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Ezatollah%20Ahmadi"> Ezatollah Ahmadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Neuroplasticity or the flexibility of the neural system is the ability of the brain to adapt to the lack or deterioration of sense and the capability of the neural system to modify itself through changing shape and function. Not only have studies revealed that neuroplasticity does not end in childhood, but also they have proven that it continues till the end of life and is not limited to the neural system and covers the cognitive system as well. In the field of cognition, neuroplasticity is defined as the ability to change old thoughts according to new conditions and the individuals' differences in using various styles of cognitive regulation inducing several social, emotional and cognitive outcomes. On the other hand, complexities of daily life necessitates cognitive neuroplasticity in order to adapt to different circumstances. The present paper attempts to discuss and define major theories and principles of neuroplasticity and elaborate on nature or nurture. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=neuroplasticity" title="neuroplasticity">neuroplasticity</a>, <a href="https://publications.waset.org/abstracts/search?q=cognitive%20plasticity" title=" cognitive plasticity"> cognitive plasticity</a>, <a href="https://publications.waset.org/abstracts/search?q=plasticity%20theories" title=" plasticity theories"> plasticity theories</a>, <a href="https://publications.waset.org/abstracts/search?q=plasticity%20mechanisms" title=" plasticity mechanisms"> plasticity mechanisms</a> </p> <a href="https://publications.waset.org/abstracts/11412/neuroplasticity-a-fresh-begining-for-life" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11412.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">495</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">24</span> Neuroplasticity: A Fresh Beginning for Life</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Leila%20Maleki">Leila Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Ezatollah%20Ahmadi"> Ezatollah Ahmadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Neuroplasticity or the flexibility of the neural system is the ability of the brain to adapt to the lack or deterioration of sense and the capability of the neural system to modify itself through changing shape and function. Not only have studies revealed that neuroplasticity does not end in childhood, but also they have proven that it continues till the end of life and is not limited to the neural system and covers the cognitive system as well. In the field of cognition, neuroplasticity is defined as the ability to change old thoughts according to new conditions and the individuals' differences in using various styles of cognitive regulation inducing several social, emotional and cognitive outcomes. On the other hand, complexities of daily life necessitates cognitive neuroplasticity in order to adapt to different circumstances. The. present paper attempts to discuss and define major theories and principles of neuroplasticity and elaborate on nature or nurture. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=neuroplasticity" title="neuroplasticity">neuroplasticity</a>, <a href="https://publications.waset.org/abstracts/search?q=cognitive%20plasticity" title=" cognitive plasticity"> cognitive plasticity</a>, <a href="https://publications.waset.org/abstracts/search?q=plasticity%20theories" title=" plasticity theories"> plasticity theories</a>, <a href="https://publications.waset.org/abstracts/search?q=plasticity%20mechanisms" title=" plasticity mechanisms"> plasticity mechanisms</a> </p> <a href="https://publications.waset.org/abstracts/26751/neuroplasticity-a-fresh-beginning-for-life" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26751.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">452</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">23</span> Evaluation of Superabsorbent Application on Corn Yield under Deficit Irrigation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Khodadadi%20Dehkordi">Davoud Khodadadi Dehkordi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research was planned in order to study the effect of drought stress and different levels of Superabsorbent and their effect on grain yield, biologic yield and harvest index. In this study, 3 different depths of irrigation were considered as the main treatment I1, I2, I3 as 100, 75 and 50 percent of water requirement of plants respectively and different levels of Superabsorbent were used as secondary treatment (S0, S1, S2 and S3, equal to 0 (control), 15, 30 and 45 gr/m2 respectively). According to the results, independent effects of irrigation and Superabsorbent treatments at 1% level on biologic and grain yield of corn were significant. In addition, independent effect of irrigation treatments at 5% level on harvest index was significant. But independent effect of Superabsorbent treatments on harvest index was not significant. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=corn" title="corn">corn</a>, <a href="https://publications.waset.org/abstracts/search?q=deficit%20irrigation" title=" deficit irrigation"> deficit irrigation</a>, <a href="https://publications.waset.org/abstracts/search?q=superabsorbent" title=" superabsorbent"> superabsorbent</a>, <a href="https://publications.waset.org/abstracts/search?q=yield" title=" yield"> yield</a> </p> <a href="https://publications.waset.org/abstracts/24469/evaluation-of-superabsorbent-application-on-corn-yield-under-deficit-irrigation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24469.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">360</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">22</span> The Role of Psychological Factors in Prediction Academic Performance of Students</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hadi%20Molaei">Hadi Molaei</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasavoli%20Davoud"> Yasavoli Davoud</a>, <a href="https://publications.waset.org/abstracts/search?q=Keshavarz"> Keshavarz</a>, <a href="https://publications.waset.org/abstracts/search?q=Mozhde%20Poordana"> Mozhde Poordana</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study aimed was to prediction the academic performance based on academic motivation, self-efficacy and Resiliency in the students. The present study was descriptive and correlational. Population of the study consisted of all students in Arak schools in year 1393-94. For this purpose, the number of 304 schools students in Arak was selected using multi-stage cluster sampling. They all questionnaires, self-efficacy, Resiliency and academic motivation Questionnaire completed. Data were analyzed using Pearson correlation and multiple regressions. Pearson correlation showed academic motivation, self-efficacy, and Resiliency with academic performance had a positive and significant relationship. In addition, multiple regression analysis showed that the academic motivation, self-efficacy and Resiliency were predicted academic performance. Based on the findings could be conclude that in order to increase the academic performance and further progress of students must provide the ground to strengthen academic motivation, self-efficacy and Resiliency act on them. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=academic%20motivation" title="academic motivation">academic motivation</a>, <a href="https://publications.waset.org/abstracts/search?q=self-efficacy" title=" self-efficacy"> self-efficacy</a>, <a href="https://publications.waset.org/abstracts/search?q=resiliency" title=" resiliency"> resiliency</a>, <a href="https://publications.waset.org/abstracts/search?q=academic%20performance" title=" academic performance"> academic performance</a> </p> <a href="https://publications.waset.org/abstracts/24763/the-role-of-psychological-factors-in-prediction-academic-performance-of-students" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24763.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">496</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">21</span> Children’s (re)actions in the Scaffolding Process Using Digital Technologies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Masoumi">Davoud Masoumi</a>, <a href="https://publications.waset.org/abstracts/search?q=Maryam%20Bourbour"> Maryam Bourbour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> By characterizing children’s actions in the scaffolding process, which is often undermined and ignored in the studies reviewed, this study aimed to examine children’s different (re)actions in relation to the teachers’ actions in a context where digital technologies are used. Over five months, 22 children aged 4-6 with five preschool teachers were video observed. The study brought in rich details of the children’s actions in relation to the teacher’s actions in the scaffolding process. The findings of the study reveal thirteen (re)actions, including Giving short response; Explaining; Participating in the activities; Examining; Smiling and laughing; Pointing and showing; Working together; Challenging each other; Problem-solving skills; Developing vocabulary; Choosing the activity; Expressing of the emotions; and Identifying the similarities and differences. Our findings expanded and deepened the understanding of the scaffolding process, which can contribute to the notion of scaffolding and help us to gain further understanding about scaffolding of children’s learning. Characterizing the children’s (re)action in relation to teacher’s scaffolding actions further can contribute to ongoing discussions about how teachers can scaffold children’s learning using digital technologies in the learning process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=children%E2%80%99%20%28re%29actions" title="children’ (re)actions">children’ (re)actions</a>, <a href="https://publications.waset.org/abstracts/search?q=scaffolding%20process" title=" scaffolding process"> scaffolding process</a>, <a href="https://publications.waset.org/abstracts/search?q=technologies" title=" technologies"> technologies</a>, <a href="https://publications.waset.org/abstracts/search?q=preschools" title=" preschools"> preschools</a> </p> <a href="https://publications.waset.org/abstracts/159537/childrens-reactions-in-the-scaffolding-process-using-digital-technologies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/159537.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">83</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">20</span> Quantum Statistical Mechanical Formulations of Three-Body Problems via Non-Local Potentials</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Maghari">A. Maghari</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20M.%20Maleki"> V. M. Maleki</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we present a quantum statistical mechanical formulation from our recently analytical expressions for partial-wave transition matrix of a three-particle system. We report the quantum reactive cross sections for three-body scattering processes 1 + (2,3)-> 1 + (2,3) as well as recombination 1 + (2,3) -> 2 + (3,1) between one atom and a weakly-bound dimer. The analytical expressions of three-particle transition matrices and their corresponding cross-sections were obtained from the three-dimensional Faddeev equations subjected to the rank-two non-local separable potentials of the generalized Yamaguchi form. The equilibrium quantum statistical mechanical properties such partition function and equation of state as well as non-equilibrium quantum statistical properties such as transport cross-sections and their corresponding transport collision integrals were formulated analytically. This leads to obtain the transport properties, such as viscosity and diffusion coefficient of a moderate dense gas. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=statistical%20mechanics" title="statistical mechanics">statistical mechanics</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlocal%20separable%20potential" title=" nonlocal separable potential"> nonlocal separable potential</a>, <a href="https://publications.waset.org/abstracts/search?q=three-body%20interaction" title=" three-body interaction"> three-body interaction</a>, <a href="https://publications.waset.org/abstracts/search?q=faddeev%20equations" title=" faddeev equations"> faddeev equations</a> </p> <a href="https://publications.waset.org/abstracts/35738/quantum-statistical-mechanical-formulations-of-three-body-problems-via-non-local-potentials" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35738.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">401</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19</span> Chemical Composition and Antimicrobial Activity of the Essential Oil of Mentha piperita Endemic in Khorasan-Iran</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V.%20Hakimzadeh">V. Hakimzadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Noori"> M. Noori</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20maleki"> M. maleki</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study was to determine the composition and antimicrobial effect of Mentha piperita essential oil in "in-vitro" condition. The chemical composition of the essential oil obtained by hydro-distillation was examined by GC/MS and the antimicrobial effect was studied on the growth of seven microbial species including Bacillus cereus, Pseudomonas aeruginosa and Proteus vulgaris using micro-dilution method. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined. Chemical composition analysis identified a total of 28 compounds in which the main components were menthol (32%), mentone (13.4), menthyl acetate (12%), 1,8-cineole (8.2%) and neomenthol (4%) representing 69.6 % of the total oil. Other separated components accounted for less than 30.4% of the oil. Results of antimicrobial analysis showed that the MIC values for Bacillus cereus, Pseudomonas aeruginosa and Proteus vulgaris was respectively 50, 200 and 100 µg/ml and the MBC was determined at 200, 400 and 200 µg/ml respectively. The results of the present study indicated that Mentha piperita essential oil had significant antimicrobial activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antimicrobial%20activity" title="antimicrobial activity">antimicrobial activity</a>, <a href="https://publications.waset.org/abstracts/search?q=essential%20oil%20composition" title=" essential oil composition"> essential oil composition</a>, <a href="https://publications.waset.org/abstracts/search?q=Mentha%20piperita" title=" Mentha piperita"> Mentha piperita</a> </p> <a href="https://publications.waset.org/abstracts/11605/chemical-composition-and-antimicrobial-activity-of-the-essential-oil-of-mentha-piperita-endemic-in-khorasan-iran" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11605.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">528</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18</span> Investigating the Behavior of Underground Structures in the Event of an Earthquake</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Beheshtizadeh">Davoud Beheshtizadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Farzin%20Malekpour"> Farzin Malekpour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The progress of technology and producing new machinery have made a big change in excavation operations and construction of underground structures. The limitations of space and some other economic, politic and military considerations gained the attention of most developed and developing countries towards the construction of these structures for mine, military, and development objectives. Underground highways, tunnels, subways, oil reservoir resources, fuels, nuclear wastes burying reservoir and underground stores are increasingly developing and being used in these countries. The existence and habitability of the cities depend on these underground installations or in other words these vital arteries. Stopping the flow of water, gas leakage and explosion, collapsing of sewage paths, etc., resulting from the earthquake are among the factors that can severely harm the environment and increase the casualty. Lack of sewage network and complete stoppage of the flow of water in Bam (Iran) is a good example of this kind. In this paper, we investigate the effect of wave orientation on structures and deformation of them and the effect of faulting on underground structures, and then, we study resistance of reinforced concrete against earthquake, simulate two different samples, analyze the result and point out the importance of paying attention to underground installations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=underground%20structures" title="underground structures">underground structures</a>, <a href="https://publications.waset.org/abstracts/search?q=earthquake" title=" earthquake"> earthquake</a>, <a href="https://publications.waset.org/abstracts/search?q=underground%20installations" title=" underground installations"> underground installations</a>, <a href="https://publications.waset.org/abstracts/search?q=axial%20deformations" title=" axial deformations"> axial deformations</a> </p> <a href="https://publications.waset.org/abstracts/86411/investigating-the-behavior-of-underground-structures-in-the-event-of-an-earthquake" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/86411.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">193</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">17</span> Artificial Intelligence in the Design of High-Strength Recycled Concrete</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hadi%20Rouhi%20Belvirdi">Hadi Rouhi Belvirdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Beheshtizadeh"> Davoud Beheshtizadeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The increasing demand for sustainable construction materials has led to a growing interest in high-strength recycled concrete (HSRC). Utilizing recycled materials not only reduces waste but also minimizes the depletion of natural resources. This study explores the application of artificial intelligence (AI) techniques to model and predict the properties of HSRC. In the past two decades, the production levels in various industries and, consequently, the amount of waste have increased significantly. Continuing this trend will undoubtedly cause irreparable damage to the environment. For this reason, engineers have been constantly seeking practical solutions for recycling industrial waste in recent years. This research utilized the results of the compressive strength of 90-day high-strength recycled concrete. The method for creating recycled concrete involved replacing sand with crushed glass and using glass powder instead of cement. Subsequently, a feedforward artificial neural network was employed to model the compressive strength results for 90 days. The regression and error values obtained indicate that this network is suitable for modeling the compressive strength data. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=high-strength%20recycled%20concrete" title="high-strength recycled concrete">high-strength recycled concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=feedforward%20artificial%20neural%20network" title=" feedforward artificial neural network"> feedforward artificial neural network</a>, <a href="https://publications.waset.org/abstracts/search?q=regression" title=" regression"> regression</a>, <a href="https://publications.waset.org/abstracts/search?q=construction%20materials" title=" construction materials"> construction materials</a> </p> <a href="https://publications.waset.org/abstracts/193212/artificial-intelligence-in-the-design-of-high-strength-recycled-concrete" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/193212.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">12</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">16</span> The Findings EEG-LORETA about Epilepsy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Leila%20Maleki">Leila Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Esmali%20Kooraneh"> Ahmad Esmali Kooraneh</a>, <a href="https://publications.waset.org/abstracts/search?q=Hossein%20%20Taghi%20Derakhshi"> Hossein Taghi Derakhshi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Neural activity in the human brain starts from the early stages of prenatal development. This activity or signals generated by the brain are electrical in nature and represent not only the brain function but also the status of the whole body. At the present moment, three methods can record functional and physiological changes within the brain with high temporal resolution of neuronal interactions at the network level: the electroencephalogram (EEG), the magnet oencephalogram (MEG), and functional magnetic resonance imaging (fMRI); each of these has advantages and shortcomings. EEG recording with a large number of electrodes is now feasible in clinical practice. Multichannel EEG recorded from the scalp surface provides a very valuable but indirect information about the source distribution. However, deep electrode measurements yield more reliable information about the source locations، Intracranial recordings and scalp EEG are used with the source imaging techniques to determine the locations and strengths of the epileptic activity. As a source localization method, Low Resolution Electro-Magnetic Tomography (LORETA) is solved for the realistic geometry based on both forward methods, the Boundary Element Method (BEM) and the Finite Difference Method (FDM). In this paper, we review The findings EEG- LORETA about epilepsy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=epilepsy" title="epilepsy">epilepsy</a>, <a href="https://publications.waset.org/abstracts/search?q=EEG" title=" EEG"> EEG</a>, <a href="https://publications.waset.org/abstracts/search?q=EEG-LORETA" title=" EEG-LORETA"> EEG-LORETA</a> </p> <a href="https://publications.waset.org/abstracts/32799/the-findings-eeg-loreta-about-epilepsy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32799.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">545</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15</span> The Application of System Approach to Knowledge Management and Human Resource Management Evidence from Tehran Municipality</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vajhollah%20Ghorbanizadeh">Vajhollah Ghorbanizadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Seyed%20Mohsen%20Asadi"> Seyed Mohsen Asadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mirali%20Seyednaghavi"> Mirali Seyednaghavi</a>, <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Hoseynpour"> Davoud Hoseynpour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the current era, all organizations need knowledge to be able to manage the diverse human resources. Creative, dynamic and knowledge-based Human resources are important competitive advantage and the scarcest resource in today's knowledge-based economy. In addition managers with skills of knowledge management must be aware of human resource management science. It is now generally accepted that successful implementation of knowledge management requires dynamic interaction between knowledge management and human resource management. This is emphasized at systematic approach to knowledge management as well. However human resource management can be complementary of knowledge management because human resources management with the aim of empowering human resources as the key resource organizations in the 21st century, the use of other resources, creating and growing and developing today. Thus, knowledge is the major capital of every organization which is introduced through the process of knowledge management. In this context, knowledge management is systematic approach to create, receive, organize, access, and use of knowledge and learning in the organization. This article aims to define and explain the concepts of knowledge management and human resource management and the importance of these processes and concepts. Literature related to knowledge management and human resource management as well as related topics were studied, then to design, illustrate and provide a theoretical model to explain the factors affecting the relationship between knowledge management and human resource management and knowledge management system approach, for schematic design and are drawn. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=systemic%20approach" title="systemic approach">systemic approach</a>, <a href="https://publications.waset.org/abstracts/search?q=human%20resources" title=" human resources"> human resources</a>, <a href="https://publications.waset.org/abstracts/search?q=knowledge" title=" knowledge"> knowledge</a>, <a href="https://publications.waset.org/abstracts/search?q=human%20resources%20management" title=" human resources management"> human resources management</a>, <a href="https://publications.waset.org/abstracts/search?q=knowledge%20management" title=" knowledge management"> knowledge management</a> </p> <a href="https://publications.waset.org/abstracts/42223/the-application-of-system-approach-to-knowledge-management-and-human-resource-management-evidence-from-tehran-municipality" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42223.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">376</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">14</span> Effect of Perception on People’s Behavior in Public Space </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Morteza%20Maleki">Morteza Maleki </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present study is that it tried to behave in the environment to be monitored and the respective roles of environment (assumed as a vessel) and human beings (assumed as occupants of this vessel) inevitably create effects which can be expressed as various behaviors on the part of human being. The mutual relationship between man and his environment is exhibited through perceptions, behaviors, subjective images, activities, etc. This study investigates the conceptual dimension in the form of the four components of readability, sense of place, identity, and Tenability (tenability) at the Ahmadabad Axis in Mashhad. The theoretical fundamentals and the data regarding the status quo were presented through the descriptive method and the proposed policies were derived through analyzing the available status quo information. The required data were gathered from library resources and documents related to the studied area as well as from instruments used in field methods such as questionnaires. Upon conducting the necessary investigation, the conceptual dimension within the design area was analyzed. The SWOT table was presented, and the results obtained for improving environmental perception were arranged in the form of policy-making tables and operational projects tables for improving the sense of place, creating imagery, and other investigated components. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=public%20space" title="public space">public space</a>, <a href="https://publications.waset.org/abstracts/search?q=perception" title=" perception"> perception</a>, <a href="https://publications.waset.org/abstracts/search?q=environment" title=" environment"> environment</a>, <a href="https://publications.waset.org/abstracts/search?q=behavior" title=" behavior"> behavior</a> </p> <a href="https://publications.waset.org/abstracts/35808/effect-of-perception-on-peoples-behavior-in-public-space" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35808.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">392</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13</span> Using an Epidemiological Model to Study the Spread of Misinformation during the Black Lives Matter Movement</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maryam%20Maleki">Maryam Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Esther%20Mead"> Esther Mead</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Arani"> Mohammad Arani</a>, <a href="https://publications.waset.org/abstracts/search?q=Nitin%20Agarwal"> Nitin Agarwal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The proliferation of social media platforms like Twitter has heightened the consequences of the spread of misinformation. To understand and model the spread of misinformation, in this paper, we leveraged the SEIZ (Susceptible, Exposed, Infected, Skeptics) epidemiological model to describe the underlying process that delineates the spread of misinformation on Twitter. Compared to the other epidemiological models, this model produces broader results because it includes the additional Skeptics (Z) compartment, wherein a user may be Exposed to an item of misinformation but not engage in any reaction to it, and the additional Exposed (E) compartment, wherein the user may need some time before deciding to spread a misinformation item. We analyzed misinformation regarding the unrest in Washington, D.C. in the month of March 2020, which was propagated by the use of the #DCblackout hashtag by different users across the U.S. on Twitter. Our analysis shows that misinformation can be modeled using the concept of epidemiology. To the best of our knowledge, this research is the first to attempt to apply the SEIZ epidemiological model to the spread of a specific item of misinformation, which is a category distinct from that of rumor and hoax on online social media platforms. Applying a mathematical model can help to understand the trends and dynamics of the spread of misinformation on Twitter and ultimately help to develop techniques to quickly identify and control it. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Black%20Lives%20Matter" title="Black Lives Matter">Black Lives Matter</a>, <a href="https://publications.waset.org/abstracts/search?q=epidemiological%20model" title=" epidemiological model"> epidemiological model</a>, <a href="https://publications.waset.org/abstracts/search?q=mathematical%20modeling" title=" mathematical modeling"> mathematical modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=misinformation" title=" misinformation"> misinformation</a>, <a href="https://publications.waset.org/abstracts/search?q=SEIZ%20model" title=" SEIZ model"> SEIZ model</a>, <a href="https://publications.waset.org/abstracts/search?q=Twitter" title=" Twitter"> Twitter</a> </p> <a href="https://publications.waset.org/abstracts/132209/using-an-epidemiological-model-to-study-the-spread-of-misinformation-during-the-black-lives-matter-movement" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/132209.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">165</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">12</span> A Comparative Evaluation of the SIR and SEIZ Epidemiological Models to Describe the Diffusion Characteristics of COVID-19 Polarizing Viewpoints on Online</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maryam%20Maleki">Maryam Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Esther%20Mead"> Esther Mead</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Arani"> Mohammad Arani</a>, <a href="https://publications.waset.org/abstracts/search?q=Nitin%20Agarwal"> Nitin Agarwal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study is conducted to examine how opposing viewpoints related to COVID-19 were diffused on Twitter. To accomplish this, six datasets using two epidemiological models, SIR (Susceptible, Infected, Recovered) and SEIZ (Susceptible, Exposed, Infected, Skeptics), were analyzed. The six datasets were chosen because they represent opposing viewpoints on the COVID-19 pandemic. Three of the datasets contain anti-subject hashtags, while the other three contain pro-subject hashtags. The time frame for all datasets is three years, starting from January 2020 to December 2022. The findings revealed that while both models were effective in evaluating the propagation trends of these polarizing viewpoints, the SEIZ model was more accurate with a relatively lower error rate (6.7%) compared to the SIR model (17.3%). Additionally, the relative error for both models was lower for anti-subject hashtags compared to pro-subject hashtags. By leveraging epidemiological models, insights into the propagation trends of polarizing viewpoints on Twitter were gained. This study paves the way for the development of methods to prevent the spread of ideas that lack scientific evidence while promoting the dissemination of scientifically backed ideas. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mathematical%20modeling" title="mathematical modeling">mathematical modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=epidemiological%20model" title=" epidemiological model"> epidemiological model</a>, <a href="https://publications.waset.org/abstracts/search?q=seiz%20model" title=" seiz model"> seiz model</a>, <a href="https://publications.waset.org/abstracts/search?q=sir%20model" title=" sir model"> sir model</a>, <a href="https://publications.waset.org/abstracts/search?q=covid-19" title=" covid-19"> covid-19</a>, <a href="https://publications.waset.org/abstracts/search?q=twitter" title=" twitter"> twitter</a>, <a href="https://publications.waset.org/abstracts/search?q=social%20network%20analysis" title=" social network analysis"> social network analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=social%20contagion" title=" social contagion"> social contagion</a> </p> <a href="https://publications.waset.org/abstracts/177941/a-comparative-evaluation-of-the-sir-and-seiz-epidemiological-models-to-describe-the-diffusion-characteristics-of-covid-19-polarizing-viewpoints-on-online" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/177941.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">62</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">11</span> Introducing New and Less Known Sources of Geomorphosites for Geotourism Development, with Examples from Misho-dagh Mountain in Northwestern Iran</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Mokhtari">Davoud Mokhtari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the factors behind the increasing development of geotourism is the identification and introduction of new facets of amazing geosphere phenomena. The Misho-Dagh Mountains in northwestern Iran are one of the rich geodiversity areas. The presence of some rare and interesting phenomena in this mountain has increased the potential of this region for geotourism development. Active pressure ridges, arcuate valleys, sag Ponds, granite complexes, glacial rock springs, and displaced habitats due to tectonic activity are among the most significant phenomena in the study area. The research is based on the literature review of geotourism and personal research experiences on geomorphosites of the northwest of Iran. Monitoring the changes of geomorphosites and evaluation of corresponding changes in the geomorphosite̕s location and their capabilities using satellite images and fieldwork is done. In this study, six geomorphosite were introduced, each with special characteristics and with one of the geotourism topics. Selection of this location of northwestern Iran is due to the focus of author of this paper is on this part of the country, and there is no doubt that such places, even with higher values of geotourism, there are in various parts of Iran and the world that could be interested in this field of emerging science. From in situ observations taken in the field and estimating a level of impact, employing assessment techniques, and then finally extrapolating the resultant factors across all case studies, we have been able to generate a geotourism map for future planning purposes. Accordingly, it should be noted that we are not just part of the landscape of the geomorphosites. The geomorphosites are also part of our landscape. It is hoped that the findings of this paper can open a new world of geotourism that, if is not associated with geomorphological processes, will be very short. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=geotourism" title="geotourism">geotourism</a>, <a href="https://publications.waset.org/abstracts/search?q=sources%20of%20geotourism" title=" sources of geotourism"> sources of geotourism</a>, <a href="https://publications.waset.org/abstracts/search?q=geotouristic%20areas" title=" geotouristic areas"> geotouristic areas</a>, <a href="https://publications.waset.org/abstracts/search?q=mishow_dagh" title=" mishow_dagh"> mishow_dagh</a>, <a href="https://publications.waset.org/abstracts/search?q=northwest%20of%20Iran" title=" northwest of Iran"> northwest of Iran</a> </p> <a href="https://publications.waset.org/abstracts/166196/introducing-new-and-less-known-sources-of-geomorphosites-for-geotourism-development-with-examples-from-misho-dagh-mountain-in-northwestern-iran" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166196.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">93</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">10</span> Investigations of the Crude Oil Distillation Preheat Section in Unit 100 of Abadan Refinery and Its Recommendation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahdi%20GoharRokhi">Mahdi GoharRokhi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20H.%20Ruhipour"> Mohammad H. Ruhipour</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20R.%20ZamaniZadeh"> Mohammad R. ZamaniZadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohsen%20Maleki"> Mohsen Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Yusef%20Shamsayi"> Yusef Shamsayi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahdi%20FarhaniNejad"> Mahdi FarhaniNejad</a>, <a href="https://publications.waset.org/abstracts/search?q=Farzad%20FarrokhZadeh"> Farzad FarrokhZadeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Possessing massive resources of natural gas and petroleum, Iran has a special place among all other oil producing countries, according to international institutions of energy. In order to use these resources, development and functioning optimization of refineries and industrial units is mandatory. Heat exchanger is one of the most important and strategic equipment which its key role in the process of production is clear to everyone. For instance, if the temperature of a processing fluid is not set as needed by heat exchangers, the specifications of desired product can change profoundly. Crude oil enters a network of heat exchangers in atmospheric distillation section before getting into the distillation tower; in this case, well-functioning of heat exchangers can significantly affect the operation of distillation tower. In this paper, different scenarios for pre-heating of oil are studied using oil and gas simulation software, and the results are discussed. As we reviewed various scenarios, adding a heat exchanger to pre-heating network is proposed as the most efficient factor in improving all governing parameters of the tower i.e. temperature, pressure, and reflux rate. This exchanger is embedded in crude oil’s path. Crude oil enters the exchanger after E-101 and exchanges heat with discharging kerosene pump around from E-136. As depicted in the results, it will efficiently assist the improvement of process operation and side expenses. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=atmospheric%20distillation%20unit" title="atmospheric distillation unit">atmospheric distillation unit</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchanger" title=" heat exchanger"> heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=preheat" title=" preheat"> preheat</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a> </p> <a href="https://publications.waset.org/abstracts/50535/investigations-of-the-crude-oil-distillation-preheat-section-in-unit-100-of-abadan-refinery-and-its-recommendation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50535.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">660</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">9</span> Evaluation and Selection of Drilling Technologies: An Application of Portfolio Analysis Matrix in South Azadgan Oilfield</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Maleki%20Sadabad">M. Maleki Sadabad</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Pointing"> A. Pointing</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Marashi"> N. Marashi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> With respect to the role and increasing importance of technology for countries development, in recent decades technology development has paid attention in a systematic form. Nowadays the markets face with highly complicated and competitive conditions in foreign markets, therefore, evaluation and selection of technology effectiveness and also formulating technology strategy have changed into a vital subject for some organizations. The study introduces the standards of empowerment evaluation and technology attractiveness especially strategic technologies which explain the way of technology evaluation, selection and finally formulating suitable technology strategy in the field of drilling in South Azadegan oil field. The study firstly identifies the key challenges of oil fields in order to evaluate the technologies in field of drilling in South Azadegan oil field through an interview with the experts of industry and then they have been prioritised. In the following, the existing and new technologies were identified to solve the challenges of South Azadegan oil field. In order to explore the ability, availability, and attractiveness of every technology, a questionnaire based on Julie indices has been designed and distributed among the industry elites. After determining the score of ability, availability and attractiveness, every technology which has been obtained by the average of expert’s ideas, the technology package has been introduced by Morin’s model. The matrix includes four areas which will follow the especial strategy. Finally, by analysing the above matrix, the technology options have been suggested in order to select and invest. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=technology" title="technology">technology</a>, <a href="https://publications.waset.org/abstracts/search?q=technology%20identification" title=" technology identification"> technology identification</a>, <a href="https://publications.waset.org/abstracts/search?q=drilling%20technologies" title=" drilling technologies"> drilling technologies</a>, <a href="https://publications.waset.org/abstracts/search?q=technology%20capability" title=" technology capability"> technology capability</a> </p> <a href="https://publications.waset.org/abstracts/103371/evaluation-and-selection-of-drilling-technologies-an-application-of-portfolio-analysis-matrix-in-south-azadgan-oilfield" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/103371.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">142</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> Analytical Determination of Electromechanical Coupling Effects on Interlaminar Stresses of Generally Laminated Piezoelectric Plates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Atieh%20Andakhshideh">Atieh Andakhshideh</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Maleki"> S. Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Sayed%20Sadegh%20Marashi"> Sayed Sadegh Marashi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the interlaminar stresses of generally laminated piezoelectric plates are presented. The electromechanical coupling effect of the piezoelectric plate is considered and the governing equations and boundary conditions are derived using the principle of minimum total potential energy. The solution procedure is a three-dimensional multi-term extended Kantorovich method (3DMTEKM). The objective of this paper is to accurately study coupling influence on the edge effects of piezolaminated plates with finite dimensions, arbitrary lamination lay-ups and under uniform axial strain. These results can provide a benchmark for checking the accuracy of the other numerical method or two-dimensional laminate theories. To verify the accuracy of the 3DMTEKM, first examples are simplified to special cases such as cross-ply or symmetric laminations and are compared with other analytical solutions available in the literature. Excellent agreement is achieved in validation test and other numerical results are presented for general cases. Numerical examples indicate the singular behavior of interlaminar normal/shear stresses and electric field strength components near the edges of the piezolaminated plates. The coupling influence on the free edge effect with respect to lamination lay-ups of piezoelectric plate is studied in several examples. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electromechanical%20coupling" title="electromechanical coupling">electromechanical coupling</a>, <a href="https://publications.waset.org/abstracts/search?q=generally%20laminated%20piezoelectric%20plates" title=" generally laminated piezoelectric plates"> generally laminated piezoelectric plates</a>, <a href="https://publications.waset.org/abstracts/search?q=Kantorovich%20method" title=" Kantorovich method"> Kantorovich method</a>, <a href="https://publications.waset.org/abstracts/search?q=edge%20effect" title=" edge effect"> edge effect</a>, <a href="https://publications.waset.org/abstracts/search?q=interlaminar%20stresses" title=" interlaminar stresses"> interlaminar stresses</a> </p> <a href="https://publications.waset.org/abstracts/93911/analytical-determination-of-electromechanical-coupling-effects-on-interlaminar-stresses-of-generally-laminated-piezoelectric-plates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93911.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">148</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7</span> Theoretical Analysis and Design Consideration of Screened Heat Pipes for Low-Medium Concentration Solar Receivers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Jafari">Davoud Jafari</a>, <a href="https://publications.waset.org/abstracts/search?q=Paolo%20Di%20Marco"> Paolo Di Marco</a>, <a href="https://publications.waset.org/abstracts/search?q=Alessandro%20Franco"> Alessandro Franco</a>, <a href="https://publications.waset.org/abstracts/search?q=Sauro%20Filippeschi"> Sauro Filippeschi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper summarizes the results of an investigation into the heat pipe heat transfer for solar collector applications. The study aims to show the feasibility of a concentrating solar collector, which is coupled with a heat pipe. Particular emphasis is placed on the capillary and boiling limits in capillary porous structures, with different mesh numbers and wick thicknesses. A mathematical model of a cylindrical heat pipe is applied to study its behaviour when it is exposed to higher heat input at the evaporator. The steady state analytical model includes two-dimensional heat conduction in the HP’s wall, the liquid flow in the wick and vapor hydrodynamics. A sensitivity analysis was conducted by considering different design criteria and working conditions. Different wicks (mesh 50, 100, 150, 200, 250, and, 300), different porosities (0.5, 0.6, 0.7, 0.8, and 0.9) with different wick thicknesses (0.25, 0.5, 1, 1.5, and 2 mm) are analyzed with water as a working fluid. Results show that it is possible to improve heat transfer capability (HTC) of a HP by selecting the appropriate wick thickness, the effective pore radius, and lengths for a given HP configuration, and there exist optimal design criteria (optimal thick, evaporator adiabatic and condenser sections). It is shown that the boiling and wicking limits are connected and occurs in dependence on each other. As different parts of the HP external surface collect different fractions of the total incoming insolation, the analysis of non-uniform heat flux distribution indicates that peak heat flux is not affecting parameter. The parametric investigations are aimed to determine working limits and thermal performance of HP for medium temperature SC application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=screened%20heat%20pipes" title="screened heat pipes">screened heat pipes</a>, <a href="https://publications.waset.org/abstracts/search?q=analytical%20model" title=" analytical model"> analytical model</a>, <a href="https://publications.waset.org/abstracts/search?q=boiling%20and%20capillary%20limits" title=" boiling and capillary limits"> boiling and capillary limits</a>, <a href="https://publications.waset.org/abstracts/search?q=concentrating%20collector" title=" concentrating collector"> concentrating collector</a> </p> <a href="https://publications.waset.org/abstracts/17286/theoretical-analysis-and-design-consideration-of-screened-heat-pipes-for-low-medium-concentration-solar-receivers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17286.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">560</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> Key Principles and Importance of Applied Geomorphological Maps for Engineering Structure Placement</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sahar%20Maleki">Sahar Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Reza%20Shahbazi"> Reza Shahbazi</a>, <a href="https://publications.waset.org/abstracts/search?q=Nayere%20Sadat%20Bayat%20Ghiasi"> Nayere Sadat Bayat Ghiasi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Applied geomorphological maps are crucial tools in engineering, particularly for the placement of structures. These maps provide precise information about the terrain, including landforms, soil types, and geological features, which are essential for making informed decisions about construction sites. The importance of these maps is evident in risk assessment, as they help identify potential hazards such as landslides, erosion, and flooding, enabling better risk management. Additionally, these maps assist in selecting the most suitable locations for engineering projects. Cost efficiency is another significant benefit, as proper site selection and risk assessment can lead to substantial cost savings by avoiding unsuitable areas and minimizing the need for extensive ground modifications. Ensuring the maps are accurate and up-to-date is crucial for reliable decision-making. Detailed information about various geomorphological features is necessary to provide a comprehensive overview. Integrating geomorphological data with other environmental and engineering data to create a holistic view of the site is one of the most fundamental steps in engineering. In summary, the preparation of applied geomorphological maps is a vital step in the planning and execution of engineering projects, ensuring safety, efficiency, and sustainability. In the Geological Survey of Iran, the preparation of these applied maps has enabled the identification and recognition of areas prone to geological hazards such as landslides, subsidence, earthquakes, and more. Additionally, areas with problematic soils, potential groundwater zones, and safe construction sites are identified and made available to the public. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=geomorphological%20maps" title="geomorphological maps">geomorphological maps</a>, <a href="https://publications.waset.org/abstracts/search?q=geohazards" title=" geohazards"> geohazards</a>, <a href="https://publications.waset.org/abstracts/search?q=risk%20assessment" title=" risk assessment"> risk assessment</a>, <a href="https://publications.waset.org/abstracts/search?q=decision-making" title=" decision-making"> decision-making</a> </p> <a href="https://publications.waset.org/abstracts/192988/key-principles-and-importance-of-applied-geomorphological-maps-for-engineering-structure-placement" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192988.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">23</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> Energy Consumption Estimation for Hybrid Marine Power Systems: Comparing Modeling Methodologies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kamyar%20Maleki%20Bagherabadi">Kamyar Maleki Bagherabadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Torstein%20Aarseth%20B%C3%B8"> Torstein Aarseth Bø</a>, <a href="https://publications.waset.org/abstracts/search?q=Truls%20Flatberg"> Truls Flatberg</a>, <a href="https://publications.waset.org/abstracts/search?q=Olve%20Mo"> Olve Mo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydrogen fuel cells and batteries are one of the promising solutions aligned with carbon emission reduction goals for the marine sector. However, the higher installation and operation costs of hydrogen-based systems compared to conventional diesel gensets raise questions about the appropriate hydrogen tank size, energy, and fuel consumption estimations. Ship designers need methodologies and tools to calculate energy and fuel consumption for different component sizes to facilitate decision-making regarding feasibility and performance for retrofits and design cases. The aim of this work is to compare three alternative modeling approaches for the estimation of energy and fuel consumption with various hydrogen tank sizes, battery capacities, and load-sharing strategies. A fishery vessel is selected as an example, using logged load demand data over a year of operations. The modeled power system consists of a PEM fuel cell, a diesel genset, and a battery. The methodologies used are: first, an energy-based model; second, considering load variations during the time domain with a rule-based Power Management System (PMS); and third, a load variations model and dynamic PMS strategy based on optimization with perfect foresight. The errors and potentials of the methods are discussed, and design sensitivity studies for this case are conducted. The results show that the energy-based method can estimate fuel and energy consumption with acceptable accuracy. However, models that consider time variation of the load provide more realistic estimations of energy and fuel consumption regarding hydrogen tank and battery size, still within low computational time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fuel%20cell" title="fuel cell">fuel cell</a>, <a href="https://publications.waset.org/abstracts/search?q=battery" title=" battery"> battery</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen" title=" hydrogen"> hydrogen</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20power%20system" title=" hybrid power system"> hybrid power system</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20management%20system" title=" power management system"> power management system</a> </p> <a href="https://publications.waset.org/abstracts/187386/energy-consumption-estimation-for-hybrid-marine-power-systems-comparing-modeling-methodologies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/187386.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">36</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Impact of Marine Hydrodynamics and Coastal Morphology on Changes in Mangrove Forests (Case Study: West of Strait of Hormuz, Iran)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatemeh%20Parhizkar">Fatemeh Parhizkar</a>, <a href="https://publications.waset.org/abstracts/search?q=Mojtaba%20Yamani"> Mojtaba Yamani</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdolla%20Behboodi"> Abdolla Behboodi</a>, <a href="https://publications.waset.org/abstracts/search?q=Masoomeh%20Hashemi"> Masoomeh Hashemi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The mangrove forests are natural and valuable gifts that exist in some parts of the world, including Iran. Regarding the threats faced by these forests and the declining area of them all over the world, as well as in Iran, it is very necessary to manage and monitor them. The current study aimed to investigate the changes in mangrove forests and the relationship between these changes and the marine hydrodynamics and coastal morphology in the area between qeshm island and the west coast of the Hormozgan province (i.e. the coastline between Mehran river and Bandar-e Pol port) in the 49-year period. After preprocessing and classifying satellite images using the SVM, MLC, and ANN classifiers and evaluating the accuracy of the maps, the SVM approach with the highest accuracy (the Kappa coefficient of 0.97 and overall accuracy of 98) was selected for preparing the classification map of all images. The results indicate that from 1972 to 1987, the area of these forests have had experienced a declining trend, and in the next years, their expansion was initiated. These forests include the mangrove forests of Khurkhuran wetland, Muriz Deraz Estuary, Haft Baram Estuary, the mangrove forest in the south of the Laft Port, and the mangrove forests between the Tabl Pier, Maleki Village, and Gevarzin Village. The marine hydrodynamic and geomorphological characteristics of the region, such as average intertidal zone, sediment data, the freshwater inlet of Mehran river, wave stability and calmness, topography and slope, as well as mangrove conservation projects make the further expansion of mangrove forests in this area possible. By providing significant and up-to-date information on the development and decline of mangrove forests in different parts of the coast, this study can significantly contribute to taking measures for the conservation and restoration of mangrove forests. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mangrove%20forests" title="mangrove forests">mangrove forests</a>, <a href="https://publications.waset.org/abstracts/search?q=marine%20hydrodynamics" title=" marine hydrodynamics"> marine hydrodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=coastal%20morphology" title=" coastal morphology"> coastal morphology</a>, <a href="https://publications.waset.org/abstracts/search?q=west%20of%20strait%20of%20Hormuz" title=" west of strait of Hormuz"> west of strait of Hormuz</a>, <a href="https://publications.waset.org/abstracts/search?q=Iran" title=" Iran"> Iran</a> </p> <a href="https://publications.waset.org/abstracts/148851/impact-of-marine-hydrodynamics-and-coastal-morphology-on-changes-in-mangrove-forests-case-study-west-of-strait-of-hormuz-iran" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/148851.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">95</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Generation of ZnO-Au Nanocomposite in Water Using Pulsed Laser Irradiation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elmira%20Solati">Elmira Solati</a>, <a href="https://publications.waset.org/abstracts/search?q=Atousa%20Mehrani"> Atousa Mehrani</a>, <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Dorranian"> Davoud Dorranian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Generation of ZnO-Au nanocomposite under laser irradiation of a mixture of the ZnO and Au colloidal suspensions are experimentally investigated. In this work, firstly ZnO and Au nanoparticles are prepared by pulsed laser ablation of the corresponding metals in water using the 1064 nm wavelength of Nd:YAG laser. In a second step, the produced ZnO and Au colloidal suspensions were mixed in different volumetric ratio and irradiated using the second harmonic of a Nd:YAG laser operating at 532 nm wavelength. The changes in the size of the nanostructure and optical properties of the ZnO-Au nanocomposite are studied as a function of the volumetric ratio of ZnO and Au colloidal suspensions. The crystalline structure of the ZnO-Au nanocomposites was analyzed by X-ray diffraction (XRD). The optical properties of the samples were examined at room temperature by a UV-Vis-NIR absorption spectrophotometer. Transmission electron microscopy (TEM) was done by placing a drop of the concentrated suspension on a carbon-coated copper grid. To further confirm the morphology of ZnO-Au nanocomposites, we performed Scanning electron microscopy (SEM) analysis. Room temperature photoluminescence (PL) of the ZnO-Au nanocomposites was measured to characterize the luminescence properties of the ZnO-Au nanocomposites. The ZnO-Au nanocomposites were characterized by Fourier transform infrared (FTIR) spectroscopy. The X-ray diffraction pattern shows that the ZnO-Au nanocomposites had the polycrystalline structure of Au. The behavior observed by images of transmission electron microscope reveals that soldering of Au and ZnO nanoparticles include their adhesion. The plasmon peak in ZnO-Au nanocomposites was red-shifted and broadened in comparison with pure Au nanoparticles. By using the Tauc’s equation, the band gap energy for ZnO-Au nanocomposites is calculated to be 3.15–3.27 eV. In this work, the formation of ZnO-Au nanocomposites shifts the FTIR peak of metal oxide bands to higher wavenumbers. PL spectra of the ZnO-Au nanocomposites show that several weak peaks in the ultraviolet region and several relatively strong peaks in the visible region. SEM image indicates that the morphology of ZnO-Au nanocomposites produced in water was spherical. The TEM images of ZnO-Au nanocomposites demonstrate that with increasing the volumetric ratio of Au colloidal suspension the adhesion increased. According to the size distribution graphs of ZnO-Au nanocomposites with increasing the volumetric ratio of Au colloidal suspension the amount of ZnO-Au nanocomposites with the smaller size is further. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Au%20nanoparticles" title="Au nanoparticles">Au nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=pulsed%20laser%20ablation" title=" pulsed laser ablation"> pulsed laser ablation</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnO-Au%20nanocomposites" title=" ZnO-Au nanocomposites"> ZnO-Au nanocomposites</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnO%20nanoparticles" title=" ZnO nanoparticles"> ZnO nanoparticles</a> </p> <a href="https://publications.waset.org/abstracts/36793/generation-of-zno-au-nanocomposite-in-water-using-pulsed-laser-irradiation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36793.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">344</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Fabrication of Carbon Nanoparticles and Graphene Using Pulsed Laser Ablation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davoud%20Dorranian">Davoud Dorranian</a>, <a href="https://publications.waset.org/abstracts/search?q=Hajar%20Sadeghi"> Hajar Sadeghi</a>, <a href="https://publications.waset.org/abstracts/search?q=Elmira%20Solati"> Elmira Solati </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Carbon nanostructures in various forms were synthesized using pulsed laser ablation of a graphite target in different liquid environment. The beam of a Q-switched Nd:YAG laser of 1064-nm wavelength at 7-ns pulse width is employed to irradiate the solid target in water, acetone, alcohol, and cetyltrimethylammonium bromide (CTAB). Then the effect of the liquid environment on the characteristic of carbon nanostructures produced by laser ablation was investigated. The optical properties of the carbon nanostructures were examined at room temperature by UV–Vis-NIR spectrophotometer. The crystalline structure of the carbon nanostructures was analyzed by X-ray diffraction (XRD). The morphology of samples was investigated by field emission scanning electron microscope (FE-SEM). Transmission electron microscope (TEM) was employed to investigate the form of carbon nanostructures. Raman spectroscopy was used to determine the quality of carbon nanostructures. Results show that different carbon nanostructures such as nanoparticles and few-layer graphene were formed in various liquid environments. The UV-Vis-NIR absorption spectra of samples reveal that the intensity of absorption peak of nanoparticles in alcohol is higher than the other liquid environments due to the larger number of nanoparticles in this environment. The red shift of the absorption peak of the sample in acetone confirms that produced carbon nanoparticles in this liquid are averagely larger than the other medium. The difference in the intensity and shape of the absorption peak indicated the effect of the liquid environment in producing the nanoparticles. The XRD pattern of the sample in water indicates an amorphous structure due to existence the graphene sheets. X-ray diffraction pattern shows that the degree of crystallinity of sample produced in CTAB is higher than the other liquid environments. Transmission electron microscopy images reveal that the generated carbon materials in water are graphene sheet and in the other liquid environments are graphene sheet and spherical nanostructures. According to the TEM images, we have the larger amount of carbon nanoparticles in the alcohol environment. FE-SEM micrographs indicate that in this liquids sheet like structures are formed however in acetone, produced sheets are adhered and these layers overlap with each other. According to the FE-SEM micrographs, the surface morphology of the sample in CTAB was coarser than that without surfactant. From Raman spectra, it can be concluded the distinct shape, width, and position of the graphene peaks and corresponding graphite source. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanostructures" title="carbon nanostructures">carbon nanostructures</a>, <a href="https://publications.waset.org/abstracts/search?q=graphene" title=" graphene"> graphene</a>, <a href="https://publications.waset.org/abstracts/search?q=pulsed%20laser%20ablation" title=" pulsed laser ablation"> pulsed laser ablation</a>, <a href="https://publications.waset.org/abstracts/search?q=graphite" title=" graphite"> graphite</a> </p> <a href="https://publications.waset.org/abstracts/36792/fabrication-of-carbon-nanoparticles-and-graphene-using-pulsed-laser-ablation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36792.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info 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