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Taheri</title> <meta name="description" content="Search results for: Atena Taheri"> <meta name="keywords" content="Atena Taheri"> <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="Atena Taheri"> <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> 48</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Atena Taheri</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">48</span> Strengthening Bridge Piers by Carbon Fiber Reinforced Polymer (CFRP): A Case Study for Thuan Phuoc Suspension Bridge in Vietnam</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lan%20Nguyen">Lan Nguyen</a>, <a href="https://publications.waset.org/abstracts/search?q=Lam%20Cao%20Van"> Lam Cao Van</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thuan Phuoc is a suspension bridge built in Danang city, Vietnam. Because this bridge locates near the estuary, its structure has degraded rapidly. Many cracks have currently occurred on most of the concrete piers of the curved approach spans. This paper aims to present the results of diagnostic analysis of causes for cracks as well as some calculations for strengthening piers by carbon fiber reinforced polymer (CFRP). Besides, it describes how to use concrete nonlinear analysis software ATENA to diagnostically analyze cracks, strengthening designs. Basing on the results of studying the map of distributing crack on Thuan Phuoc bridge’s concrete piers is analyzed by the software ATENA is suitable for the real conditions and CFRP would be the best solution to strengthen piers in a sound and fast way. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ATENA" title="ATENA">ATENA</a>, <a href="https://publications.waset.org/abstracts/search?q=bridge%20pier%20strengthening" title=" bridge pier strengthening"> bridge pier strengthening</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20fiber%20reinforced%20polymer%20%28CFRP%29" title=" carbon fiber reinforced polymer (CFRP)"> carbon fiber reinforced polymer (CFRP)</a>, <a href="https://publications.waset.org/abstracts/search?q=crack%20prediction%20analysis" title=" crack prediction analysis"> crack prediction analysis</a> </p> <a href="https://publications.waset.org/abstracts/54125/strengthening-bridge-piers-by-carbon-fiber-reinforced-polymer-cfrp-a-case-study-for-thuan-phuoc-suspension-bridge-in-vietnam" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54125.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">242</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">47</span> Using High Performance Concrete in Finite Element Modeling of Grouted Connections for Offshore Wind Turbine Structures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Aboubakr">A. Aboubakr</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Fehling"> E. Fehling</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Mourad"> S. A. Mourad</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Omar"> M. Omar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Wind energy is one of the most effective renewable sources especially offshore wind energy although offshore wind technology is more costly to produce. It is well known that offshore wind energy can potentially be very cheap once infrastructure and researches improve. Laterally, the trend is to construct offshore wind energy to generate the electricity form wind. This leads to intensive research in order to improve the infrastructures. Offshore wind energy is the construction of wind farms in bodies of water to generate electricity from wind. The most important part in offshore wind turbine structure is the foundation and its connection with the wind tower. This is the main difference between onshore and offshore structures. Grouted connection between the foundation and the wind tower is the most important part of the building process when constructing wind offshore turbines. Most attention should be paid to the actual grout connection as this transfers the loads safely from tower to foundations and the soil also. In this paper, finite element analyses have been carried out for studying the behaviour of offshore grouted connection for wind turbine structures. ATENA program have been used for non-linear analysis simulation of the real structural behavior thus demonstrating the crushing, cracking, contact between the two materials and steel yielding. A calibration of the material used in the simulation has been carried out assuring an accurate model of the used material by ATENA program. This calibration was performed by comparing the results from the ATENA program with experimental results to validate the material properties used in ATENA program. Three simple patch test models with different properties have been performed. The research is concluded with a result that the calibration showing a good agreement between the ATENA program material behaviors and the experimental results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=grouted%20connection" title="grouted connection">grouted connection</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20modeling" title=" 3D modeling"> 3D modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20analysis" title=" finite element analysis"> finite element analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=offshore%20wind%20energy%20turbines" title=" offshore wind energy turbines"> offshore wind energy turbines</a>, <a href="https://publications.waset.org/abstracts/search?q=stresses" title=" stresses "> stresses </a> </p> <a href="https://publications.waset.org/abstracts/14882/using-high-performance-concrete-in-finite-element-modeling-of-grouted-connections-for-offshore-wind-turbine-structures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14882.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">46</span> Modeling and Minimizing the Effects of Ferroresonance for Medium Voltage Transformers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Hossein%20Mohammadi%20Sanjani">Mohammad Hossein Mohammadi Sanjani</a>, <a href="https://publications.waset.org/abstracts/search?q=Ashknaz%20Oraee"> Ashknaz Oraee</a>, <a href="https://publications.waset.org/abstracts/search?q=Arian%20Amirnia"> Arian Amirnia</a>, <a href="https://publications.waset.org/abstracts/search?q=Atena%20Taheri"> Atena Taheri</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammadreza%20Arabi"> Mohammadreza Arabi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmud%20Fotuhi-Firuzabad"> Mahmud Fotuhi-Firuzabad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ferroresonance effects cause overvoltage in medium voltage transformers and isolators used in electrical networks. Ferroresonance effects are nonlinear and occur between the network capacitor and the nonlinear inductance of the voltage transformer during saturation. This phenomenon is unwanted for transformers since it causes overheating, introduction of high dynamic forces in primary coils, and rise of voltage in primary coils for the voltage transformer. Furthermore, it results in electrical and thermal failure of the transformer. Expansion of distribution lines, design of the transformer in smaller sizes, and the increase of harmonics in distribution networks result in an increase of ferroresonance. There is limited literature available to improve the effects of ferroresonance; therefore, optimizing its effects for voltage transformers is of great importance. In this study, comprehensive modeling of a medium voltage block-type voltage transformer is performed. In addition, a recent model is proposed to improve the performance of voltage transformers during the occurrence of ferroresonance using damping oscillations. Also, transformer design optimization is presented in this study to show further improvements in the performance of the voltage transformer. The recently proposed model is experimentally tested and verified on a medium voltage transformer in the laboratory, and simulation results show a large reduction of the effects of ferroresonance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=optimization" title="optimization">optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=voltage%20transformer" title=" voltage transformer"> voltage transformer</a>, <a href="https://publications.waset.org/abstracts/search?q=ferroresonance" title=" ferroresonance"> ferroresonance</a>, <a href="https://publications.waset.org/abstracts/search?q=modeling" title=" modeling"> modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=damper" title=" damper"> damper</a> </p> <a href="https://publications.waset.org/abstracts/169686/modeling-and-minimizing-the-effects-of-ferroresonance-for-medium-voltage-transformers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/169686.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">101</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">45</span> Influence of AAR-Induced Expansion Level on Confinement Efficiency of CFRP Wrapping Applied to Damaged Circular Concrete Columns</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Thamer%20Kubat">Thamer Kubat</a>, <a href="https://publications.waset.org/abstracts/search?q=Riadh%20Al%20Mahiadi"> Riadh Al Mahiadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Shayan"> Ahmad Shayan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The alkali-aggregate reaction (AAR) in concrete has a negative influence on the mechanical properties and durability of concrete. Confinement by carbon fiber reinforced polymer (CFRP) is an effective method of treatment for some AAR-affected elements. Eighteen reinforced columns affected by different levels of expansion due to AAR were confined using CFRP to evaluate the effect of expansion level on confinement efficiency. Strength and strain capacities (axial and circumferential) were measured using photogrammetry under uniaxial compressive loading to evaluate the efficiency of CFRP wrapping for the rehabilitation of affected columns. In relation to uniaxial compression capacity, the results indicated that the confinement of AAR-affected columns by one layer of CFRP is sufficient to reach and exceed the load capacity of unaffected sound columns. Parallel to the experimental study, finite element (FE) modeling using ATENA software was employed to predict the behavior of CFRP-confined damaged concrete and determine the possibility of using the model in a parametric study by simulating the number of CFRP layers. A comparison of the experimental results with the results of the theoretical models showed that FE modeling could be used for the prediction of the behavior of confined AAR-damaged concrete. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ATENA" title="ATENA">ATENA</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20fiber%20reinforced%20polymer%20%28CFRP%29" title=" carbon fiber reinforced polymer (CFRP)"> carbon fiber reinforced polymer (CFRP)</a>, <a href="https://publications.waset.org/abstracts/search?q=confinement%20efficiency" title=" confinement efficiency"> confinement efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20%28FE%29" title=" finite element (FE)"> finite element (FE)</a> </p> <a href="https://publications.waset.org/abstracts/160404/influence-of-aar-induced-expansion-level-on-confinement-efficiency-of-cfrp-wrapping-applied-to-damaged-circular-concrete-columns" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/160404.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">76</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">44</span> Influence of Alkali Aggregate Reaction Induced Expansion Level on Confinement Efficiency of Carbon Fiber Reinforcement Polymer Wrapping Applied to Damaged Concrete Columns</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Thamer%20Kubat">Thamer Kubat</a>, <a href="https://publications.waset.org/abstracts/search?q=Riadh%20Al-Mahaidi"> Riadh Al-Mahaidi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Shayan"> Ahmad Shayan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The alkali-aggregate reaction (AAR) in concrete has a negative influence on the mechanical properties and durability of concrete. Confinement by carbon fibre-reinforced polymer (CFRP) is an effective method of treatment for some AAR-affected elements. Eighteen reinforced columns affected by different levels of expansion due to AAR were confined using CFRP to evaluate the effect of expansion level on confinement efficiency. Strength and strain capacities (axial and circumferential) were measured using photogrammetry under uniaxial compressive loading to evaluate the efficiency of CFRP wrapping for the rehabilitation of affected columns. In relation to uniaxial compression capacity, the results indicated that the confinement of AAR-affected columns by one layer of CFRP is sufficient to reach and exceed the load capacity of unaffected sound columns. Parallel to the experimental study, finite element (FE) modeling using ATENA software was employed to predict the behavior of CFRP-confined damaged concrete and determine the possibility of using the model in a parametric study by simulating the number of CFRP layers. A comparison of the experimental results with the results of the theoretical models showed that FE modeling could be used for the prediction of the behavior of confined AAR-damaged concrete. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20fiber%20reinforced%20polymer%20%28CFRP%29" title="carbon fiber reinforced polymer (CFRP)">carbon fiber reinforced polymer (CFRP)</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20%28FE%29" title=" finite element (FE)"> finite element (FE)</a>, <a href="https://publications.waset.org/abstracts/search?q=ATENA" title=" ATENA"> ATENA</a>, <a href="https://publications.waset.org/abstracts/search?q=confinement%20efficiency" title=" confinement efficiency"> confinement efficiency</a> </p> <a href="https://publications.waset.org/abstracts/166174/influence-of-alkali-aggregate-reaction-induced-expansion-level-on-confinement-efficiency-of-carbon-fiber-reinforcement-polymer-wrapping-applied-to-damaged-concrete-columns" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166174.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">78</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">43</span> Nanohybride Porphyrin and Silver as an Efficient Catalyst for Oxidation of Alcohols by Tetrabutylammonium Peroxomonosulfate</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Atena%20Naeimi">Atena Naeimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Asghar%20Amiri"> Asghar Amiri</a>, <a href="https://publications.waset.org/abstracts/search?q=Zahra%20Ghasemi"> Zahra Ghasemi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A stable suspension of nanocomposite simple manganese(III) meso-tetraphenylporphyrin nanoaggregates and Ag was prepared by a host–guest procedure, in which ethanol and water are used as ‘green’ solvents. The oxidation of alcohols by tetrabutylammonium Peroxomonosulfate(TP) were efficiently enhanced with excellent selectivity under the influence of simple Mn(TPP)OAc (TPP = meso-tetraphenylporphyrin) nanoparticles. Enhanced stabilities and activities were achieved with nanostructured Mn catalysts compared to those of the individual counterparts in solution according to turnover numbers and UV/Vis studies. The title nanocatalyst facilitates a greener reaction because the reaction solvent is water and TP is safe to use. The efficiency of the oxidation system depends critically upon the steric hindrances and electronic structures of both nitrogen donor ligand sand porphyrin nanoparticles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=oxidation" title="oxidation">oxidation</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoaggregates" title=" nanoaggregates"> nanoaggregates</a>, <a href="https://publications.waset.org/abstracts/search?q=porphyrinoids" title=" porphyrinoids"> porphyrinoids</a>, <a href="https://publications.waset.org/abstracts/search?q=silver" title=" silver"> silver</a> </p> <a href="https://publications.waset.org/abstracts/38183/nanohybride-porphyrin-and-silver-as-an-efficient-catalyst-for-oxidation-of-alcohols-by-tetrabutylammonium-peroxomonosulfate" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/38183.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">296</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">42</span> Simulation of Flow Patterns in Vertical Slot Fishway with Cylindrical Obstacles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohsen%20Solimani%20Babarsad">Mohsen Solimani Babarsad</a>, <a href="https://publications.waset.org/abstracts/search?q=Payam%20Taheri"> Payam Taheri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Numerical results of vertical slot fishways with and without cylinders study are presented. The simulated results and the measured data in the fishways are compared to validate the application of the model. This investigation is made using FLUENT V.6.3, a Computational Fluid Dynamics solver. Advantages of using these types of numerical tools are the possibility of avoiding the St.-Venant equations’ limitations, and turbulence can be modeled by means of different models such as the k-ε model. In general, the present study has demonstrated that the CFD model could be useful for analysis and design of vertical slot fishways with cylinders. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=slot%20Fish-way" title="slot Fish-way">slot Fish-way</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD" title=" CFD"> CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=k-%CE%B5%20model" title=" k-ε model"> k-ε model</a>, <a href="https://publications.waset.org/abstracts/search?q=St.-Venant%20equations%E2%80%99" title=" St.-Venant equations’"> St.-Venant equations’</a> </p> <a href="https://publications.waset.org/abstracts/31504/simulation-of-flow-patterns-in-vertical-slot-fishway-with-cylindrical-obstacles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31504.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">363</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">41</span> Knowledge Audit Model for Requirement Elicitation Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Laleh%20Taheri">Laleh Taheri</a>, <a href="https://publications.waset.org/abstracts/search?q=Noraini%20C.%20Pa"> Noraini C. Pa</a>, <a href="https://publications.waset.org/abstracts/search?q=Rusli%20Abdullah"> Rusli Abdullah</a>, <a href="https://publications.waset.org/abstracts/search?q=Salfarina%20Abdullah"> Salfarina Abdullah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Knowledge plays an important role to the success of any organization. Software development organizations are highly knowledge-intensive organizations especially in their Requirement Elicitation Process (REP). There are several problems regarding communicating and using the knowledge in REP such as misunderstanding, being out of scope, conflicting information and changes of requirements. All of these problems occurred in transmitting the requirements knowledge during REP. Several researches have been done in REP in order to solve the problem towards requirements. Knowledge Audit (KA) approaches were proposed in order to solve managing knowledge in human resources, financial, and manufacturing. There is lack of study applying the KA in requirements elicitation process. Therefore, this paper proposes a KA model for REP in supporting to acquire good requirements. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=knowledge%20audit" title="knowledge audit">knowledge audit</a>, <a href="https://publications.waset.org/abstracts/search?q=requirement%20elicitation%20process" title=" requirement elicitation process"> requirement elicitation process</a>, <a href="https://publications.waset.org/abstracts/search?q=KA%20model" title=" KA model"> KA model</a>, <a href="https://publications.waset.org/abstracts/search?q=knowledge%20in%20requirement%20elicitation" title=" knowledge in requirement elicitation"> knowledge in requirement elicitation</a> </p> <a href="https://publications.waset.org/abstracts/4339/knowledge-audit-model-for-requirement-elicitation-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4339.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">345</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">40</span> Additive White Gaussian Noise Filtering from ECG by Wiener Filter and Median Filter: A Comparative Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hossein%20Javidnia">Hossein Javidnia</a>, <a href="https://publications.waset.org/abstracts/search?q=Salehe%20Taheri"> Salehe Taheri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Electrocardiogram (ECG) is the recording of the heart’s electrical potential versus time. ECG signals are often contaminated with noise such as baseline wander and muscle noise. As these signals have been widely used in clinical studies to detect heart diseases, it is essential to filter these noises. In this paper we compare performance of Wiener Filtering and Median Filtering methods to filter Additive White Gaussian (AWG) noise with the determined signal to noise ratio (SNR) ranging from 3 to 5 dB applied to long-term ECG recordings samples. Root mean square error (RMSE) and coefficient of determination (R2) between the filtered ECG and original ECG was used as the filter performance indicator. Experimental results show that Wiener filter has better noise filtering performance than Median filter. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ECG%20noise%20filtering" title="ECG noise filtering">ECG noise filtering</a>, <a href="https://publications.waset.org/abstracts/search?q=Wiener%20filtering" title=" Wiener filtering"> Wiener filtering</a>, <a href="https://publications.waset.org/abstracts/search?q=median%20filtering" title=" median filtering"> median filtering</a>, <a href="https://publications.waset.org/abstracts/search?q=Gaussian%20noise" title=" Gaussian noise"> Gaussian noise</a>, <a href="https://publications.waset.org/abstracts/search?q=filtering%20performance" title=" filtering performance"> filtering performance</a> </p> <a href="https://publications.waset.org/abstracts/9623/additive-white-gaussian-noise-filtering-from-ecg-by-wiener-filter-and-median-filter-a-comparative-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9623.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">529</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">39</span> Investigation of the Effect of Pressure Changes on the Gas Proportional Detector</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20M.%20Golgoun">S. M. Golgoun</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20M.%20Taheri"> S. M. Taheri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Investigation of radioactive contamination of personnel working in radiation centers to identify radioactive materials and then measure the potential contamination and eliminate it has always been considered. For this purpose, various ways have been proposed so far and different devices have been designed and built. Gas sealed proportional counter has special working conditions. In this research, a gas sealed detector of proportional counter type was made and then its various parameters were investigated. Some parameters are influential on their working conditions and one of these most important parameters is the internal pressure of the proportional gas-filled detector. In this experimental research, we produced software for examination and altering high voltage, registering data, and calculating efficiency. By this, we investigated different gas pressure effects on detector efficiency and proposed optimizing working conditions of this detector. After reviewing the results, we suggested a range between 20-30 mbar pressure for this gas sealed detector. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gas%20sealed" title="gas sealed">gas sealed</a>, <a href="https://publications.waset.org/abstracts/search?q=proportional%20detector" title=" proportional detector"> proportional detector</a>, <a href="https://publications.waset.org/abstracts/search?q=pressure" title=" pressure"> pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=counter" title=" counter"> counter</a> </p> <a href="https://publications.waset.org/abstracts/146316/investigation-of-the-effect-of-pressure-changes-on-the-gas-proportional-detector" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/146316.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">119</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">38</span> Effects of Alkaline Pretreatment Parameters on the Corrosion Resistance and ‎Wettability of Magnesium Implant</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahtab%20Assadian">Mahtab Assadian</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohd%20Hasbullah%20Idris"> Mohd Hasbullah Idris</a>, <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Rezazadeh%20Shirdar"> Mostafa Rezazadeh Shirdar</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Mahdi%20Taheri"> Mohammad Mahdi Taheri</a>, <a href="https://publications.waset.org/abstracts/search?q=%E2%80%8ES.%20Izman"> ‎S. Izman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Corrosion behaviour and surface roughness of magnesium substrate were investigated after NaOH pretreatment in different concentrations (1, 5, and 10 molar) and duration of (10 min, 30 min, 1 h, 3 h, 6 h and 24 h). Creation of Mg(OH)2 barrier layer after pretreatment enhanced corrostion resistance as well as wettability of substrate surface. Characterization including Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) was conducted to detect the existence of this barrier layer. Surface roughness and wettability of substrate was evaluated using atomic force microscopy (AFM) and contact angle measurement respectively. It is found that magnesium treated by 1M NaOH for 30 min reveals higher corrosion resistance and lower water contact angle of substrate surface. In addition, this investigation indicates that pH value of SBF solution is strongly influenced by different time and concentration of alkaline pretreatment. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnesium" title="magnesium">magnesium</a>, <a href="https://publications.waset.org/abstracts/search?q=NaOH%20pretreatment" title=" NaOH pretreatment"> NaOH pretreatment</a>, <a href="https://publications.waset.org/abstracts/search?q=corrosion%20resistance" title=" corrosion resistance"> corrosion resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=wettability" title=" wettability"> wettability</a> </p> <a href="https://publications.waset.org/abstracts/14548/effects-of-alkaline-pretreatment-parameters-on-the-corrosion-resistance-and-wettability-of-magnesium-implant" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14548.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">961</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">37</span> Numerical Study of Natural Convection in a Triangular Enclosure as an Attic for Different Geometries and Boundary Conditions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Golchoobian">H. Golchoobian</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Saedodin"> S. Saedodin</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20H.%20Taheri"> M. H. Taheri</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Sarafraz"> A. Sarafraz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, natural convection in an attic is numerically investigated. The geometry of the problem is considered to be a triangular enclosure. ANSYS Fluent software is used for modeling and numerical solution. This study is for steady state. Four right-angled triangles with height to base ratios of 2, 1, 0.5 and 0.25 are considered. The behavior of various parameters related to its performance, including temperature distribution and velocity vectors are evaluated, and graphs for the Nusselt number have been drawn. Also, in this study, the effect of geometric shape of enclosure with different height-to-base ratios has been evaluated for three types of boundary conditions of winter, summer day and one another state. It can be concluded that as the bottom side temperature and ratio of base to height of the enclosure increases, the convective effects become more prominent and circulation happened. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=enclosure" title="enclosure">enclosure</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20convection" title=" natural convection"> natural convection</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20solution" title=" numerical solution"> numerical solution</a>, <a href="https://publications.waset.org/abstracts/search?q=Nusselt%20number" title=" Nusselt number"> Nusselt number</a>, <a href="https://publications.waset.org/abstracts/search?q=triangular" title=" triangular"> triangular</a> </p> <a href="https://publications.waset.org/abstracts/113867/numerical-study-of-natural-convection-in-a-triangular-enclosure-as-an-attic-for-different-geometries-and-boundary-conditions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/113867.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">197</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">36</span> Investigation the Photocatalytic Properties of Fe3O4-ZnO Nanocomposites Prepared by Sonochemical Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Atena%20Naeimi">Atena Naeimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehri-Sadat%20Ekrami-Kakhki"> Mehri-Sadat Ekrami-Kakhki</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fe3O4 is one of the important magnetic oxides with spinel structure; it has exhibited unique electric and magnetic properties based on the electron transfer between Fe2+ and Fe3+ in the octahedral sites. Fe3O4 have received considerable attention in various areas such as cancer therapy, drug targeting, enzyme immobilization catalysis, magnetic cell separation, magnetic refrigeration systems and super-paramagnetic materials. Fe3O4–ZnO nanostructures were synthesized via a surfactant-free ultrasonic reaction at room temperatures. The effect of various parameters such as temperature, time, and power on the size and morphology of the product was investigated. Alternating gradient force magnetometer shows that Fe3O4 nanoparticles exhibit super-paramagnetic behaviour at room temperature. For preparation of nanocomposite 1 g of Fe3O4 nanostructures were dispersed in 100 mL of distilled water. 0.25 g of Zn (NO3)2 and 20 mL of NH3 solution 1 M were then slowly added to the solution under ultrasonic irradiation. The product was centrifuged, washed with distilled water and dried in the air. The photocatalytic behaviour of Fe3O4–ZnO nanoparticles was evaluated using the degradation of a methyl orange aqueous solution under ultraviolet light irradiation. As time increased, more and more methyl orange was adsorbed on the nanoparticles catalyst, until the absorption peak vanish. The methyl orange concentration decreased rapidly with increasing UV-irradiation time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanocomposite" title="nanocomposite">nanocomposite</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic" title=" ultrasonic"> ultrasonic</a>, <a href="https://publications.waset.org/abstracts/search?q=paramagnetic" title=" paramagnetic"> paramagnetic</a>, <a href="https://publications.waset.org/abstracts/search?q=photocatalytic" title=" photocatalytic"> photocatalytic</a> </p> <a href="https://publications.waset.org/abstracts/32325/investigation-the-photocatalytic-properties-of-fe3o4-zno-nanocomposites-prepared-by-sonochemical-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32325.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">302</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">35</span> Modeling and Performance Evaluation of Three Power Generation and Refrigeration Energy Recovery Systems from Thermal Loss of a Diesel Engine in Different Driving Conditions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Golchoobian">H. Golchoobian</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20H.%20Taheri"> M. H. Taheri</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Saedodin"> S. Saedodin</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Sarafraz"> A. Sarafraz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper investigates the possibility of using three systems of organic Rankine auxiliary power generation, ejector refrigeration and absorption to recover energy from a diesel car. The analysis is done for both urban and suburban driving modes that vary from 60 to 120 km/h. Various refrigerants have also been used for organic Rankine and Ejector refrigeration cycles. The capacity was evaluated by Organic Rankine Cycle (ORC) system in both urban and suburban conditions for cyclopentane and ammonia as refrigerants. Also, for these two driving plans, produced cooling by absorption refrigeration system under variable ambient temperature conditions and in ejector refrigeration system for R123, R134a and R141b refrigerants were investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=absorption%20system" title="absorption system">absorption system</a>, <a href="https://publications.waset.org/abstracts/search?q=diesel%20engine" title=" diesel engine"> diesel engine</a>, <a href="https://publications.waset.org/abstracts/search?q=ejector%20refrigeration" title=" ejector refrigeration"> ejector refrigeration</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20recovery" title=" energy recovery"> energy recovery</a>, <a href="https://publications.waset.org/abstracts/search?q=organic%20Rankine%20cycle" title=" organic Rankine cycle"> organic Rankine cycle</a> </p> <a href="https://publications.waset.org/abstracts/113865/modeling-and-performance-evaluation-of-three-power-generation-and-refrigeration-energy-recovery-systems-from-thermal-loss-of-a-diesel-engine-in-different-driving-conditions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/113865.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">235</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">34</span> Harmonic Mitigation and Total Harmonic Distortion Reduction in Grid-Connected PV Systems: A Case Study Using Real-Time Data and Filtering Techniques</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Atena%20Tazikeh%20Lemeski">Atena Tazikeh Lemeski</a>, <a href="https://publications.waset.org/abstracts/search?q=Ismail%20Ozdamar"> Ismail Ozdamar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study presents a detailed analysis of harmonic distortion in a grid-connected photovoltaic (PV) system using real-time data captured from a solar power plant. Harmonics introduced by inverters in PV systems can degrade power quality and lead to increased Total Harmonic Distortion (THD), which poses challenges such as transformer overheating, increased power losses, and potential grid instability. This research addresses these issues by applying Fast Fourier Transform (FFT) to identify significant harmonic components and employing notch filters to target specific frequencies, particularly the 3rd harmonic (150 Hz), which was identified as the largest contributor to THD. Initial analysis of the unfiltered voltage signal revealed a THD of 21.15%, with prominent harmonic peaks at 150 Hz, 250 Hz and 350 Hz, corresponding to the 3rd, 5th, and 7th harmonics, respectively. After implementing the notch filters, the THD was reduced to 5.72%, demonstrating the effectiveness of this approach in mitigating harmonic distortion without affecting the fundamental frequency. This paper provides practical insights into the application of real-time filtering techniques in PV systems and their role in improving overall grid stability and power quality. The results indicate that targeted harmonic mitigation is crucial for the sustainable integration of renewable energy sources into modern electrical grids. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=grid-connected%20photovoltaic%20systems" title="grid-connected photovoltaic systems">grid-connected photovoltaic systems</a>, <a href="https://publications.waset.org/abstracts/search?q=fast%20Fourier%20transform" title=" fast Fourier transform"> fast Fourier transform</a>, <a href="https://publications.waset.org/abstracts/search?q=harmonic%20filtering" title=" harmonic filtering"> harmonic filtering</a>, <a href="https://publications.waset.org/abstracts/search?q=inverter-induced%20harmonics" title=" inverter-induced harmonics"> inverter-induced harmonics</a> </p> <a href="https://publications.waset.org/abstracts/192300/harmonic-mitigation-and-total-harmonic-distortion-reduction-in-grid-connected-pv-systems-a-case-study-using-real-time-data-and-filtering-techniques" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192300.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">34</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">33</span> Effect of Submerged Water Jet's Cross Section Shapes on Mixing Length</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohsen%20Solimani%20Babarsad">Mohsen Solimani Babarsad</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Rastgoo"> Mohammad Rastgoo</a>, <a href="https://publications.waset.org/abstracts/search?q=Payam%20Taheri"> Payam Taheri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the important applications of hydraulic jets is used for discharge industrial, agricultural and urban wastewater into the rivers or other ambient water to reduce negative effects of pollutant water. Submerged jets due to turbulent condition can mix large amount of dense pollutant water with ambient flow. This study is conducted to investigate the distribution and length of the mixing zone in hydraulic jet's flow field with change in cross section shapes of nozzle. Toward this end, three shapes of cross section (square, circle and rectangular) and three saline densities current with different concentration are considered in a flume with 600 cm as long, 100 cm as high and 150 cm in width. Various discharges were used to evaluate mixing length for a wide range of densimetric Froude numbers, Frd, from 100 to 550 that is defined at the nozzle. Consequently, the circular nozzle, in comparison with other sections, has a densimetric Froude number 11% higher than square nozzle and 26% higher than rectangular nozzle. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20jet" title="hydraulic jet">hydraulic jet</a>, <a href="https://publications.waset.org/abstracts/search?q=mixing%20zone" title=" mixing zone"> mixing zone</a>, <a href="https://publications.waset.org/abstracts/search?q=densimetric%20Froude%20number" title=" densimetric Froude number"> densimetric Froude number</a>, <a href="https://publications.waset.org/abstracts/search?q=nozzle" title=" nozzle "> nozzle </a> </p> <a href="https://publications.waset.org/abstracts/9237/effect-of-submerged-water-jets-cross-section-shapes-on-mixing-length" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9237.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">363</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">32</span> Realistic Testing Procedure of Power Swing Blocking Function in Distance Relay</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Farzad%20Razavi">Farzad Razavi</a>, <a href="https://publications.waset.org/abstracts/search?q=Behrooz%20Taheri"> Behrooz Taheri</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Parpaei"> Mohammad Parpaei</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Mohammadi%20Ghalesefidi"> Mehdi Mohammadi Ghalesefidi</a>, <a href="https://publications.waset.org/abstracts/search?q=Siamak%20Zarei"> Siamak Zarei</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As one of the major problems in protecting large-dimension power systems, power swing and its effect on distance have caused a lot of damages to energy transfer systems in many parts of the world. Therefore, power swing has gained attentions of many researchers, which has led to invention of different methods for power swing detection. Power swing detection algorithm is highly important in distance relay, but protection relays should have general requirements such as correct fault detection, response rate, and minimization of disturbances in a power system. To ensure meeting the requirements, protection relays need different tests during development, setup, maintenance, configuration, and troubleshooting steps. This paper covers power swing scheme of the modern numerical relay protection, 7sa522 to address the effect of the different fault types on the function of the power swing blocking. In this study, it was shown that the different fault types during power swing cause different time for unblocking distance relay. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=power%20swing" title="power swing">power swing</a>, <a href="https://publications.waset.org/abstracts/search?q=distance%20relay" title=" distance relay"> distance relay</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20system%20protection" title=" power system protection"> power system protection</a>, <a href="https://publications.waset.org/abstracts/search?q=relay%20test" title=" relay test"> relay test</a>, <a href="https://publications.waset.org/abstracts/search?q=transient%20in%20power%20system" title=" transient in power system"> transient in power system</a> </p> <a href="https://publications.waset.org/abstracts/82234/realistic-testing-procedure-of-power-swing-blocking-function-in-distance-relay" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82234.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">385</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">31</span> Hearing Aids Maintenance Training for Hearing-Impaired Preschool Children with the Help of Motion Graphic Tools</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Mokhtarzadeh">M. Mokhtarzadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Taheri%20Qomi"> M. Taheri Qomi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Nikafrooz"> M. Nikafrooz</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Atashafrooz"> A. Atashafrooz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of the present study was to investigate the effectiveness of using motion graphics as a learning medium on training hearing aids maintenance skills to hearing-impaired children. The statistical population of this study consisted of all children with hearing loss in Ahvaz city, at age 4 to 7 years old. As the sample, 60, whom were selected by multistage random sampling, were randomly assigned to two groups; experimental (30 children) and control (30 children) groups. The research method was experimental and the design was pretest-posttest with the control group. The intervention consisted of a 2-minute motion graphics clip to train hearing aids maintenance skills. Data were collected using a 9-question researcher-made questionnaire. The data were analyzed by using one-way analysis of covariance. Results showed that the training of hearing aids maintenance skills with motion graphics was significantly effective for those children. The results of this study can be used by educators, teachers, professionals, and parents to train children with disabilities or normal students. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hearing%20aids" title="hearing aids">hearing aids</a>, <a href="https://publications.waset.org/abstracts/search?q=hearing%20aids%20maintenance%20skill" title=" hearing aids maintenance skill"> hearing aids maintenance skill</a>, <a href="https://publications.waset.org/abstracts/search?q=hearing%20impaired%20children" title=" hearing impaired children"> hearing impaired children</a>, <a href="https://publications.waset.org/abstracts/search?q=motion%20graphics" title=" motion graphics"> motion graphics</a> </p> <a href="https://publications.waset.org/abstracts/124635/hearing-aids-maintenance-training-for-hearing-impaired-preschool-children-with-the-help-of-motion-graphic-tools" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124635.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">158</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> A Review of the Environmental Impact of Physical Expansion of Shandiz City</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Foruzan%20Taheri">Foruzan Taheri</a>, <a href="https://publications.waset.org/abstracts/search?q=Seyedeh%20Negar%20Hosseinian"> Seyedeh Negar Hosseinian</a>, <a href="https://publications.waset.org/abstracts/search?q=Katayoon%20Alizadeh"> Katayoon Alizadeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The small countryside city of Shandiz, with a population of about 13.297 is located 35 km to the west of the Mashhad metropolitan. Due to Shandiz’s natural beauty, suitable climate, and its close proximity to Mashhad which is the largest city in the eastern half of the country, many people own second houses in this area. In addition to this, Shandiz hosts millions of visitors annually. Its economic role, which is parallel and complementary to Mashhad, has caused population growth, the increase of activities, and physical expansion, all of which exceed the city’s capacity. The aim of this descriptive and analytical study was to evaluate the impact of city expansion on the environment and aid in preventing further harm to the natural environment of this perimeter. Data were collected from population and housing statistics during a different period of time-based on GIS. Results show that the existence of an integrated environmental management system in order to coordinate development projects and the expansion of tourism programs that meet environmental conditions are necessary and achieving sustainable development with quality of life in this area without considering environmental limitations and capabilities cannot be sustained. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=population%20growth" title="population growth">population growth</a>, <a href="https://publications.waset.org/abstracts/search?q=tourism" title=" tourism"> tourism</a>, <a href="https://publications.waset.org/abstracts/search?q=physical%20development" title=" physical development"> physical development</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20impact" title=" environmental impact"> environmental impact</a>, <a href="https://publications.waset.org/abstracts/search?q=Shandiz%20City" title=" Shandiz City "> Shandiz City </a> </p> <a href="https://publications.waset.org/abstracts/20016/a-review-of-the-environmental-impact-of-physical-expansion-of-shandiz-city" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20016.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">351</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> The Lived Experience of Siblings of Autistic Children; From the Private to Public Sphere</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kiana%20Taghikhan">Kiana Taghikhan</a>, <a href="https://publications.waset.org/abstracts/search?q=Shamim%20Sherafat"> Shamim Sherafat</a>, <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Taheri"> Mostafa Taheri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Although many people with autism spectrum disorder around the world face many problems and challenges, their conditions may unintentionally affect the lives of the people around them. In this research the experiences of siblings of autistic children have been investigated in both the public and private spheres of their lives. "Private sphere" includes the experiences of research participants in socializing with relatives and family, assignments and responsibilities, as well as how they spend their leisure time and lifestyle. The "public sphere" includes the experience of their presence in society, such as university, or workplace and any outdoor activities that could have been affected by their sibling’s disorder. The present research has been done using the qualitative research method and in-depth interview technique with siblings of autistic children. The sample population is 15 individuals who participated in the research theoretically and purposefully. Based on the findings, the private and social experiences of these individuals is very different compared to peers who do not have siblings with autism disorder in the family. The difference is to such an extent that causes them to separate and distance themselves from other members of the society, and depending on their special conditions, it can affect their goals and life opportunities such as job, marriage, having children, etc. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=autism%20spectrum%20disorder" title="autism spectrum disorder">autism spectrum disorder</a>, <a href="https://publications.waset.org/abstracts/search?q=siblings" title=" siblings"> siblings</a>, <a href="https://publications.waset.org/abstracts/search?q=private%20sphere" title=" private sphere"> private sphere</a>, <a href="https://publications.waset.org/abstracts/search?q=public%20sphere" title=" public sphere"> public sphere</a> </p> <a href="https://publications.waset.org/abstracts/190021/the-lived-experience-of-siblings-of-autistic-children-from-the-private-to-public-sphere" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/190021.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">30</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> The Impact of Initiators on Fast Drying Traffic Marking Paint</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maryam%20Taheri">Maryam Taheri</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Jahanfar"> Mehdi Jahanfar</a>, <a href="https://publications.waset.org/abstracts/search?q=Kenji%20Ogino"> Kenji Ogino</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fast drying traffic marking paint comprising a solvent-borne resin, a filler, a pigment and a solvent that is especially suitable for colder ambient (temperatures near freezing) applications, where waterborne traffic paint cannot be used. Acrylic resins based on methyl methacrylate, butyl acrylate, acrylic acid, and styrene were synthesized in different solvents using organic peroxide initiators such as peroxyester, peroxyketal, dialkylperoxide and azo. After polymerization, the molecular weight (Mw), polydispersity index= PDI (Mw/Mn), viscosity, total residual monomer and APHA color were evaluated and results of organic peroxide initiators (t- butyl and t-amyl derivatives) were also compared with the azo initiator. The Mw, PDI, viscosity, mass conversation and APHA color of resins with t-amyl derivatives of organic peroxide initiators are very proper. The results of the traffic marking paints test such as non-volatile matter, no- pick- up time, hiding power, resistance to wear and water resistance study that produced with these resins also confirm this. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fast%20drying%20traffic%20marking%20paint" title="fast drying traffic marking paint">fast drying traffic marking paint</a>, <a href="https://publications.waset.org/abstracts/search?q=acrylic%20resin" title=" acrylic resin"> acrylic resin</a>, <a href="https://publications.waset.org/abstracts/search?q=organic%20peroxide%20initiator" title=" organic peroxide initiator"> organic peroxide initiator</a>, <a href="https://publications.waset.org/abstracts/search?q=peroxyester" title=" peroxyester"> peroxyester</a>, <a href="https://publications.waset.org/abstracts/search?q=peroxyketal" title=" peroxyketal"> peroxyketal</a>, <a href="https://publications.waset.org/abstracts/search?q=dialkylperoxide%20and%20azo%20initiator" title=" dialkylperoxide and azo initiator"> dialkylperoxide and azo initiator</a> </p> <a href="https://publications.waset.org/abstracts/82325/the-impact-of-initiators-on-fast-drying-traffic-marking-paint" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82325.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">208</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> Numerical Multi-Scale Modeling of Rubber Friction on Rough Pavements Using Finite Element Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ashkan%20Nazari">Ashkan Nazari</a>, <a href="https://publications.waset.org/abstracts/search?q=Saied%20Taheri"> Saied Taheri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Knowledge of tire-pavement interaction plays a crucial role in designing safer and more reliable tires. Characterizing the tire-pavement frictional interaction leads to a better understanding of vehicle performance in braking and acceleration. In this work, we devise a multi-scale simulation approach to incorporate the effect of pavement surface asperities in different length-scales. We construct two- and three-dimensional Finite Element (FE) models to simulate the interaction between a rubber block and a rough pavement surface with asperities in different scales. To achieve this, the road profile is scanned via a laser profilometer and the obtained asperities are implemented in an FE software (ABAQUS) in micro and macro length-scales. The hysteresis friction, which is due to the dissipative nature of rubber, is the main component of the friction force and therefore is the subject of study in this work. Using different scales not only will assist in characterizing the pavement asperities with sufficient details but also, it is highly effective in preventing extreme local deformations and stress gradients which results in divergence in FE simulations. The simulation results will be validated with experimental results as well as the results reported in the literature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=friction" title="friction">friction</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element" title=" finite element"> finite element</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-scale%20modeling" title=" multi-scale modeling"> multi-scale modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=rubber" title=" rubber"> rubber</a> </p> <a href="https://publications.waset.org/abstracts/103593/numerical-multi-scale-modeling-of-rubber-friction-on-rough-pavements-using-finite-element-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/103593.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">137</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> Exposing the Concealed Impact: Evaluating the Role of Development Projects on Corruption Perception in Afghanistan</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jawad%20Taheri">Jawad Taheri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper investigates the impact of foreign aid-funded development projects on corruption perception in Afghanistan, utilizing instrumental variable (IV) approaches in regression analysis setting. Seven sub-categories of development projects are examined in order to have a glance over comparative usefulness of each project. The study incorporates natural disaster indicators as exogenous variables to mitigate endogeneity concerns and control variables. The findings reveal significant associations between certain types of projects and corruption perception. Road and bridge construction, irrigation, and agriculture projects are found to decrease corruption perception, fostering optimism and trust within affected communities. Mosque construction and healthcare initiatives aligned with religious beliefs also contribute to reduced corruption perception. However, drinking water projects are associated with increased corruption perception, highlighting potential challenges in their implementation. The study emphasizes the importance of well-implemented projects, cultural contexts, and effective governance in mitigating corruption and fostering trust within communities. These findings contribute to a refined understanding of the relationship between development projects and corruption perception in Afghanistan. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=foreign%20aid" title="foreign aid">foreign aid</a>, <a href="https://publications.waset.org/abstracts/search?q=development%20projects" title=" development projects"> development projects</a>, <a href="https://publications.waset.org/abstracts/search?q=corruption%20perception" title=" corruption perception"> corruption perception</a>, <a href="https://publications.waset.org/abstracts/search?q=Afghanistan" title=" Afghanistan"> Afghanistan</a>, <a href="https://publications.waset.org/abstracts/search?q=instrumental%20variable%20analysis" title=" instrumental variable analysis"> instrumental variable analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=survey%20of%20Afghan%20people%20%28SAP%29" title=" survey of Afghan people (SAP)"> survey of Afghan people (SAP)</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20disasters" title=" natural disasters"> natural disasters</a>, <a href="https://publications.waset.org/abstracts/search?q=exogenous%20variation" title=" exogenous variation"> exogenous variation</a> </p> <a href="https://publications.waset.org/abstracts/175118/exposing-the-concealed-impact-evaluating-the-role-of-development-projects-on-corruption-perception-in-afghanistan" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/175118.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">76</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> Arduino-Based Laser Communication</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Simon%20Bambey">Simon Bambey</a>, <a href="https://publications.waset.org/abstracts/search?q=Edward%20Lim"> Edward Lim</a>, <a href="https://publications.waset.org/abstracts/search?q=Kai%20Corley-Jory"> Kai Corley-Jory</a>, <a href="https://publications.waset.org/abstracts/search?q=Pooya%20Taheri"> Pooya Taheri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main goal of this paper is to propose a simple and low-cost microcontroller-based laser communication link. To demonstrate that laser communication is a viable and efficient means for transmitting data, a transceiver capable of transfer rates of approximately 0.7 kB/s is prototyped. The hardware used for the transceiver consists of Commercial Off-The-Shelf (COTS) lasers, photodiodes, and the Arduino Mega 2560 which is an open-source and easy-to-use microcontroller-based platform intended for making interactive projects. A graphic user interface utilizing the Meteor framework is developed to facilitate the communication between the user and transceiver. The developed transceiver prototype is capable of receiving and transmitting data at significant ranges with no loss of information. Furthermore, stable and secure communication is achieved through several mechanisms developed to manage simultaneous sending and receiving, in addition to detecting physical interruptions during transmission. The design setup is scalable and with further development can be transformed into a fiber-optic transmission system. Due to its nature, laser communication is very secure and can provide a safe and private communication link. Overall, this paper demonstrates how laser communication can be an economical, durable, and effective means of information transfer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arduino%20microcontrollers" title="Arduino microcontrollers">Arduino microcontrollers</a>, <a href="https://publications.waset.org/abstracts/search?q=laser%20applications" title=" laser applications"> laser applications</a>, <a href="https://publications.waset.org/abstracts/search?q=user%20interfaces" title=" user interfaces"> user interfaces</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20communication" title=" wireless communication"> wireless communication</a> </p> <a href="https://publications.waset.org/abstracts/53299/arduino-based-laser-communication" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53299.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">302</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> Burden of Severe COVID-19 in Center of Iran: Results of Disability-Adjusted Life Years (DALYs)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Moslem%20Taheri%20Soodejani">Moslem Taheri Soodejani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Hassan%20Lotfi"> Mohammad Hassan Lotfi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: The outbreak of Covid-19 disease is an international public health concern. Therefore, the analysis of information related to mortality and disability due to COVID-19 is considered important, so the present study was designed and conducted with the aim of assessing COVID-19 Disability-Adjusted Life Years (DALYs) in Yazd. Methods: In Yazd province, all suspected cases of Covid-19 that would be referred to central hospitals in order to get confirmed through PCR or CT scan tests were recruited to our study. The fatality data of Covid- 19 was gathered from the forensic medicine organization. The Disability-Adjusted Life Years (DALYs) combines in one measure years of life lost (YLL), the loss of healthy life due to premature mortality and years of life lived with disability (YLD), the loss of healthy life because of disease and disability. Results: The total burden of COVID-19 was 23,472 years. The number of years lost due to premature death was 23385 and the number of years of life with disability due to COVID-19 was estimated to be 87 years. The disease burden was 12992 years for men and 10480 years for women. The overall incidence of COVID-19 was 1411 per 100,000, of which 1419 in men and 1402 in women per 100,000. Conclusion: The outbreak of the COVID-19 pandemic affected a large population and the residents of Yazd Province lost many years of their lives due to this disease. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DALY" title="DALY">DALY</a>, <a href="https://publications.waset.org/abstracts/search?q=covid-%2019" title=" covid- 19"> covid- 19</a>, <a href="https://publications.waset.org/abstracts/search?q=Yazd" title=" Yazd"> Yazd</a>, <a href="https://publications.waset.org/abstracts/search?q=Iran" title=" Iran"> Iran</a> </p> <a href="https://publications.waset.org/abstracts/142531/burden-of-severe-covid-19-in-center-of-iran-results-of-disability-adjusted-life-years-dalys" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142531.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">191</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> PYURF and ZED9 Have a Prominent Role in Association with Molecular Pathways in Bortezomib in Myeloma Cells in Acute Myeloid Leukemia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Atena%20Sadat%20Hosseini">Atena Sadat Hosseini</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammadhossein%20Habibi"> Mohammadhossein Habibi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Acute myeloid leukemia (AML) is the most typically diagnosed leukemia. In older adults, AML imposes a dismal outcome. AML originates with a dominant mutation, then adds collaborative, transformative mutations leading to myeloid transformation and clinical/biological heterogeneity. Several chemotherapeutic drugs are used for this cancer. These drugs are naturally associated with several side effects, and finding a more accurate molecular mechanism of these drugs can have a significant impact on the selection and better candidate of drugs for treatment. In this study, we evaluated bortezomibin myeloma cells using bioinformatics analysis and evaluation of RNA-Seq data. Then investigated the molecular pathways proteins- proteins interactions associated with this chemotherapy drug. A total of 658upregulated genes and 548 downregulated genes were sorted.AUF1 (hnRNP D0) binds and destabilizes mRNA, degradation of GLI2 by the proteasome, the role of GTSE1 in G2/M progression after G2 checkpoint, TCF dependent signaling in response to WNT demonstrated in upregulated genes. Besides insulin resistance, AKT phosphorylates targets in the nucleus, cytosine methylation, Longevity regulating pathway, and Signal Transduction of S1P Receptor were related to low expression genes. With respect to this results, HIST2H2AA3, RP11-96O20.4, ZED9, PRDX1, and DOK2, according to node degrees and betweenness elements candidates from upregulated genes. in the opposite side, PYURF, NRSN1, FGF23, UPK3BL, and STAG3 were a prominent role in downregulated genes. Sum up, Using in silico analysis in the present study, we conducted a precise study ofbortezomib molecular mechanisms in myeloma cells. so that we could take further evaluation to discovermolecular cancer therapy. Naturally, more additional experimental and clinical procedures are needed in this survey. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=myeloma%20cells" title="myeloma cells">myeloma cells</a>, <a href="https://publications.waset.org/abstracts/search?q=acute%20myeloid%20leukemia" title=" acute myeloid leukemia"> acute myeloid leukemia</a>, <a href="https://publications.waset.org/abstracts/search?q=bioinformatics%20analysis" title=" bioinformatics analysis"> bioinformatics analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=bortezomib" title=" bortezomib"> bortezomib</a> </p> <a href="https://publications.waset.org/abstracts/149978/pyurf-and-zed9-have-a-prominent-role-in-association-with-molecular-pathways-in-bortezomib-in-myeloma-cells-in-acute-myeloid-leukemia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149978.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">22</span> Numerical Simulation of Fracturing Behaviour of Pre-Cracked Crystalline Rock Using a Cohesive Grain-Based Distinct Element Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahdi%20Saadat">Mahdi Saadat</a>, <a href="https://publications.waset.org/abstracts/search?q=Abbas%20Taheri"> Abbas Taheri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Understanding the cracking response of crystalline rocks at mineralogical scale is of great importance during the design procedure of mining structures. A grain-based distinct element model (GBM) is employed to numerically study the cracking response of Barre granite at micro- and macro-scales. The GBM framework is augmented with a proposed distinct element-based cohesive model to reproduce the micro-cracking response of the inter- and intra-grain contacts. The cohesive GBM framework is implemented in PFC2D distinct element codes. The microstructural properties of Barre granite are imported in PFC2D to generate synthetic specimens. The microproperties of the model is calibrated against the laboratory uniaxial compressive and Brazilian split tensile tests. The calibrated model is then used to simulate the fracturing behaviour of pre-cracked Barre granite with different flaw configurations. The numerical results of the proposed model demonstrate a good agreement with the experimental counterparts. The GBM framework proposed thus appears promising for further investigation of the influence of grain microstructure and mineralogical properties on the cracking behaviour of crystalline rocks. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=discrete%20element%20modelling" title="discrete element modelling">discrete element modelling</a>, <a href="https://publications.waset.org/abstracts/search?q=cohesive%20grain-based%20model" title=" cohesive grain-based model"> cohesive grain-based model</a>, <a href="https://publications.waset.org/abstracts/search?q=crystalline%20rock" title=" crystalline rock"> crystalline rock</a>, <a href="https://publications.waset.org/abstracts/search?q=fracturing%20behavior" title=" fracturing behavior"> fracturing behavior</a> </p> <a href="https://publications.waset.org/abstracts/111727/numerical-simulation-of-fracturing-behaviour-of-pre-cracked-crystalline-rock-using-a-cohesive-grain-based-distinct-element-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/111727.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">129</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">21</span> The Effect of MOOC-Based Distance Education in Academic Engagement and Its Components on Kerman University Students</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fariba%20Dortaj">Fariba Dortaj</a>, <a href="https://publications.waset.org/abstracts/search?q=Reza%20Asadinejad"> Reza Asadinejad</a>, <a href="https://publications.waset.org/abstracts/search?q=Akram%20Dortaj"> Akram Dortaj</a>, <a href="https://publications.waset.org/abstracts/search?q=Atena%20Baziyar"> Atena Baziyar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study was to determine the effect of distance education (based on MOOC) on the components of academic engagement of Kerman PNU. The research was quasi-experimental method that cluster sampling with an appropriate volume was used in this study (one class in experimental group and one class in controlling group). Sampling method is single-stage cluster sampling. The statistical society is students of Kerman Payam Noor University, which) were selected 40 of them as sample (20 students in the control group and 20 students in experimental group). To test the hypothesis, it was used the analysis of univariate and Co-covariance to offset the initial difference (difference of control) in the experimental group and the control group. The instrument used in this study is academic engagement questionnaire of Zerang (2012) that contains component of cognitive, behavioral and motivational engagement. The results showed that there is no significant difference between mean scores of academic components of academic engagement in experimental group and the control group on the post-test, after elimination of the pre-test. The adjusted mean scores of components of academic engagement in the experimental group were higher than the adjusted average of scores after the test in the control group. The use of technology-based education in distance education has been effective in increasing cognitive engagement, motivational engagement and behavioral engagement among students. Experimental variable with the effect size 0.26, predicted 26% of cognitive engagement component variance. Experimental variable with the effect size 0.47, predicted 47% of the motivational engagement component variance. Experimental variable with the effect size 0.40, predicted 40% of behavioral engagement component variance. So teaching with technology (MOOC) has a positive impact on increasing academic engagement and academic performance of students in educational technology. The results suggest that technology (MOOC) is used to enrich the teaching of other lessons of PNU. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=educational%20technology" title="educational technology">educational technology</a>, <a href="https://publications.waset.org/abstracts/search?q=distance%20education" title=" distance education"> distance education</a>, <a href="https://publications.waset.org/abstracts/search?q=components%20of%20academic%20engagement" title=" components of academic engagement"> components of academic engagement</a>, <a href="https://publications.waset.org/abstracts/search?q=mooc%20technology" title=" mooc technology"> mooc technology</a> </p> <a href="https://publications.waset.org/abstracts/94571/the-effect-of-mooc-based-distance-education-in-academic-engagement-and-its-components-on-kerman-university-students" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/94571.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">149</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> Identifying Autism Spectrum Disorder Using Optimization-Based Clustering</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sharifah%20Mousli">Sharifah Mousli</a>, <a href="https://publications.waset.org/abstracts/search?q=Sona%20Taheri"> Sona Taheri</a>, <a href="https://publications.waset.org/abstracts/search?q=Jiayuan%20He"> Jiayuan He</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Autism spectrum disorder (ASD) is a complex developmental condition involving persistent difficulties with social communication, restricted interests, and repetitive behavior. The challenges associated with ASD can interfere with an affected individual’s ability to function in social, academic, and employment settings. Although there is no effective medication known to treat ASD, to our best knowledge, early intervention can significantly improve an affected individual’s overall development. Hence, an accurate diagnosis of ASD at an early phase is essential. The use of machine learning approaches improves and speeds up the diagnosis of ASD. In this paper, we focus on the application of unsupervised clustering methods in ASD as a large volume of ASD data generated through hospitals, therapy centers, and mobile applications has no pre-existing labels. We conduct a comparative analysis using seven clustering approaches such as K-means, agglomerative hierarchical, model-based, fuzzy-C-means, affinity propagation, self organizing maps, linear vector quantisation – as well as the recently developed optimization-based clustering (COMSEP-Clust) approach. We evaluate the performances of the clustering methods extensively on real-world ASD datasets encompassing different age groups: toddlers, children, adolescents, and adults. Our experimental results suggest that the COMSEP-Clust approach outperforms the other seven methods in recognizing ASD with well-separated clusters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=autism%20spectrum%20disorder" title="autism spectrum disorder">autism spectrum disorder</a>, <a href="https://publications.waset.org/abstracts/search?q=clustering" title=" clustering"> clustering</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=unsupervised%20machine%20learning" title=" unsupervised machine learning"> unsupervised machine learning</a> </p> <a href="https://publications.waset.org/abstracts/173901/identifying-autism-spectrum-disorder-using-optimization-based-clustering" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/173901.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">116</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> Effect of PMMA Shield on the Patient Dose Equivalent from Photoneutrons Produced by High Energy Medical Linacs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Seyed%20Mehdi%20Hashemi">Seyed Mehdi Hashemi</a>, <a href="https://publications.waset.org/abstracts/search?q=Gholamreza%20Raisali"> Gholamreza Raisali</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehran%20Taheri"> Mehran Taheri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the important problems of using high energy linacs at IMRT is the production of photoneutrons. Besides the clinically useful photon beams, high-energy photon beams from medical linacs produce secondary neutrons. These photoneutrons increase the patient dose and may cause secondary malignancies. The effect of the shield on the reduction of photoneutron dose equivalent produced by a high energy medical linac at the patient plane is investigated in this study. To determine the photoneutron dose equivalent received to the patient a Varian linac working at 18 MV photon mode investigated. Photoneutron dose equivalent measured with Polycarbonate films of 0.25 mm thick. PC films placed at distances of 0, 10, 20, and 50 cm from the center of X-ray field on the patient couch. The results show that by increasing the distance from the center of the X-ray beam towards the periphery, the photoneutron dose equivalent decreases rapidly for both open and shielded fields and that by inserting the shield in the path of the X-ray beam, the photoneutron dose equivalent was decreased obviously compared to open field. Results show the shield, significantly reduces photoneutron dose equivalent to the patient. Results can be readily generalized to other models of medical linacs. It may be concluded that using this kind of shield can help more safe, inexpensive and efficient employment of high energy linacs in radiotherapy and IMRT. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=photoneutron" title="photoneutron">photoneutron</a>, <a href="https://publications.waset.org/abstracts/search?q=Linac" title=" Linac"> Linac</a>, <a href="https://publications.waset.org/abstracts/search?q=PMMA%20shield" title=" PMMA shield"> PMMA shield</a>, <a href="https://publications.waset.org/abstracts/search?q=equivalent%20dose" title=" equivalent dose"> equivalent dose</a> </p> <a href="https://publications.waset.org/abstracts/32830/effect-of-pmma-shield-on-the-patient-dose-equivalent-from-photoneutrons-produced-by-high-energy-medical-linacs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32830.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info 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