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angle</title> <meta name="description" content="Search results for: phase angle"> <meta name="keywords" content="phase angle"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler ml-auto" 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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="phase angle"> <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> 5700</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: phase angle</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5700</span> Effect of Angles Collision, Absorption, Dash and Their Relationship with the Finale Results Case the Algerian Elite Team Triple Jump</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Guebli%20Abdelkader">Guebli Abdelkader</a>, <a href="https://publications.waset.org/abstracts/search?q=Zerf%20Mohammed"> Zerf Mohammed</a>, <a href="https://publications.waset.org/abstracts/search?q=Mekkades%20Moulay%20Idriss"> Mekkades Moulay Idriss</a>, <a href="https://publications.waset.org/abstracts/search?q=BenGoua%20Ali"> BenGoua Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Atouti%20Nouredinne"> Atouti Nouredinne</a>, <a href="https://publications.waset.org/abstracts/search?q=Habchi%20Nawel"> Habchi Nawel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper aims to show the influence of angles in the results of triple jump. Whereas our background confirms that a series of motions are characterized by complex angles in the properties phase (hop, step, and jump) as a combination of the pushed phase on ultimate phases in the result. For the purpose, our results are obtained from the National Athletics Championship 2013, which was filmed and analysis by the software kinovea. Based on the statistical analysis we confirm: there is a positive relationship between angle of the leg, hip angle, angle of the trunk in the collision during (hop, step, and jump), and there is a negative correlation to the angle of the knee relationship in a collision during. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=kinematics%20variables" title="kinematics variables">kinematics variables</a>, <a href="https://publications.waset.org/abstracts/search?q=the%20triple%20jump" title=" the triple jump"> the triple jump</a>, <a href="https://publications.waset.org/abstracts/search?q=the%20finale%20results" title=" the finale results"> the finale results</a>, <a href="https://publications.waset.org/abstracts/search?q=digital%20achievement" title=" digital achievement"> digital achievement</a> </p> <a href="https://publications.waset.org/abstracts/52357/effect-of-angles-collision-absorption-dash-and-their-relationship-with-the-finale-results-case-the-algerian-elite-team-triple-jump" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52357.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">327</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5699</span> Induction Motor Stator Fault Analysis Using Phase-Angle and Magnitude of the Line Currents Spectra</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Hamida%20Boudinar">Ahmed Hamida Boudinar</a>, <a href="https://publications.waset.org/abstracts/search?q=Noureddine%20Benouzza"> Noureddine Benouzza</a>, <a href="https://publications.waset.org/abstracts/search?q=Azeddine%20Bendiabdellah"> Azeddine Bendiabdellah</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20El%20Amine%20Khodja"> Mohamed El Amine Khodja</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper describes a new diagnosis approach for identification of the progressive stator winding inter-turn short-circuit fault in induction motor. This approach is based on a simple monitoring of the combined information related to both magnitude and phase-angle obtained from the fundamental by the three line currents frequency analysis. In addition, to simplify the interpretation and analysis of the data; a new graphical tool based on a triangular representation is suggested. This representation, depending on its size, enables to visualize in a simple and clear manner, the existence of the stator inter-turn short-circuit fault and its discrimination with respect to a healthy stator. Experimental results show well the benefit and effectiveness of the proposed approach. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=induction%20motor" title="induction motor">induction motor</a>, <a href="https://publications.waset.org/abstracts/search?q=magnitude" title=" magnitude"> magnitude</a>, <a href="https://publications.waset.org/abstracts/search?q=phase-angle" title=" phase-angle"> phase-angle</a>, <a href="https://publications.waset.org/abstracts/search?q=spectral%20analysis" title=" spectral analysis"> spectral analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=stator%20fault" title=" stator fault"> stator fault</a> </p> <a href="https://publications.waset.org/abstracts/71288/induction-motor-stator-fault-analysis-using-phase-angle-and-magnitude-of-the-line-currents-spectra" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71288.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">361</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">5698</span> Analysis of Wall Deformation of the Arterial Plaque Models: Effects of Viscoelasticity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Eun%20Kyung%20Kim">Eun Kyung Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Kyehan%20Rhee"> Kyehan Rhee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Viscoelastic wall properties of the arterial plaques change as the disease progresses, and estimation of wall viscoelasticity can provide a valuable assessment tool for plaque rupture prediction. Cross section of the stenotic coronary artery was modeled based on the IVUS image, and the finite element analysis was performed to get wall deformation under pulsatile pressure. The effects of viscoelastic parameters of the plaque on luminal diameter variations were explored. The result showed that decrease of viscous effect reduced the phase angle between the pressure and displacement waveforms, and phase angle was dependent on the viscoelastic properties of the wall. Because viscous effect of tissue components could be identified using the phase angle difference, wall deformation waveform analysis may be applied to predict plaque wall composition change and vascular wall disease progression. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=atherosclerotic%20plaque" title="atherosclerotic plaque">atherosclerotic plaque</a>, <a href="https://publications.waset.org/abstracts/search?q=diameter%20variation" title=" diameter variation"> diameter variation</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20method" title=" finite element method"> finite element method</a>, <a href="https://publications.waset.org/abstracts/search?q=viscoelasticity" title=" viscoelasticity"> viscoelasticity</a> </p> <a href="https://publications.waset.org/abstracts/74538/analysis-of-wall-deformation-of-the-arterial-plaque-models-effects-of-viscoelasticity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74538.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">215</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5697</span> A Study on Fatigue Performance of Asphalt Using AMPT</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yuan%20Jie%20Kelvin%20Lu">Yuan Jie Kelvin Lu</a>, <a href="https://publications.waset.org/abstracts/search?q=Amin%20Chegenizadeh"> Amin Chegenizadeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Asphalt pavement itself is a mixture made up of mainly aggregates, binders, and fillers that acts as a composition used for pavement construction. An experimental program was setup to determine the fatigue performance test of Asphalt with three different grades of conventional binders. Asphalt specimen has achieved the maximum optimum bulk density and air voids with a consistent bulk density of 2.3 t/m3, with an air void of 5% ± 0.5, before loading into the Asphalt Mixture Performance Tested (AMPT) for fatigue test. The number of cycles is defined as the point where phase angle drops, which is caused by the formation of cracks due to the increasing micro cracks when asphalt is undergoing repeated cycles of loading. Thus, the data collected are analyzed using the drop of phase angle as failure criteria. Based in the data analyzed, it is evident that the fatigue life of asphalt lies on the grade of binder. The result obtained shows that all specimens do experience a drop in phase angle due to macro cracks in the asphalt specimen. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=asphalt%20binder" title="asphalt binder">asphalt binder</a>, <a href="https://publications.waset.org/abstracts/search?q=AMPT" title=" AMPT"> AMPT</a>, <a href="https://publications.waset.org/abstracts/search?q=CX%20test" title=" CX test"> CX test</a>, <a href="https://publications.waset.org/abstracts/search?q=simplified%20%E2%80%93%20viscoelastic%20continuum%20damage%20%28S-VECD%29" title=" simplified – viscoelastic continuum damage (S-VECD)"> simplified – viscoelastic continuum damage (S-VECD)</a> </p> <a href="https://publications.waset.org/abstracts/42071/a-study-on-fatigue-performance-of-asphalt-using-ampt" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42071.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">355</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5696</span> Numerical Investigations on Dynamic Stall of a Pitching-Plunging Helicopter Blade Airfoil </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Xie%20Kai">Xie Kai</a>, <a href="https://publications.waset.org/abstracts/search?q=Laith%20K.%20Abbas"> Laith K. Abbas</a>, <a href="https://publications.waset.org/abstracts/search?q=Chen%20Dongyang"> Chen Dongyang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yang%20Fufeng"> Yang Fufeng</a>, <a href="https://publications.waset.org/abstracts/search?q=Rui%20Xiaoting"> Rui Xiaoting</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Effect of plunging motion on the pitch oscillating NACA0012 airfoil is investigated using computational fluid dynamics (CFD). A simulation model based on overset grid technology and <em>k - ω</em> shear stress transport (SST) turbulence model is established, and the numerical simulation results are compared with available experimental data and other simulations. Two cases of phase angle <em>φ = 0, μ </em>which represents the phase difference between the pitching and plunging motions of an airfoil are performed. Airfoil vortex generation, moving, and shedding are discussed in detail. Good agreements have been achieved with the available literature. The upward plunging motion made the equivalent angle of attack less than the actual one during pitching analysis. It is observed that the formation of the stall vortex is suppressed, resulting in a decrease in the lift coefficient and a delay of the stall angle. However, the downward plunging motion made the equivalent angle of attack higher the actual one. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dynamic%20stall" title="dynamic stall">dynamic stall</a>, <a href="https://publications.waset.org/abstracts/search?q=pitching-plunging" title=" pitching-plunging"> pitching-plunging</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamics" title=" computational fluid dynamics"> computational fluid dynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=helicopter%20blade%20rotor" title=" helicopter blade rotor"> helicopter blade rotor</a>, <a href="https://publications.waset.org/abstracts/search?q=airfoil" title=" airfoil"> airfoil</a> </p> <a href="https://publications.waset.org/abstracts/75693/numerical-investigations-on-dynamic-stall-of-a-pitching-plunging-helicopter-blade-airfoil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75693.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">226</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">5695</span> A Short-Baseline Dual-Antenna BDS/MEMS-IMU Integrated Navigation System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tijing%20Cai">Tijing Cai</a>, <a href="https://publications.waset.org/abstracts/search?q=Qimeng%20Xu"> Qimeng Xu</a>, <a href="https://publications.waset.org/abstracts/search?q=Daijin%20Zhou"> Daijin Zhou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper puts forward a short-baseline dual-antenna BDS/MEMS-IMU integrated navigation, constructs the carrier phase double difference model of BDS (BeiDou Navigation Satellite System), and presents a 2-position initial orientation method on BDS. The Extended Kalman-filter has been introduced for the integrated navigation system. The differences between MEMS-IMU and BDS position, velocity and carrier phase indications are used as measurements. To show the performance of the short-baseline dual-antenna BDS/MEMS-IMU integrated navigation system, the experiment results show that the position error is less than 1m, the pitch angle error and roll angle error are less than 0.1°, and the heading angle error is about 1°. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MEMS-IMU%20%28Micro-Electro-Mechanical%20System%20Inertial%20Measurement%20Unit%29" title="MEMS-IMU (Micro-Electro-Mechanical System Inertial Measurement Unit)">MEMS-IMU (Micro-Electro-Mechanical System Inertial Measurement Unit)</a>, <a href="https://publications.waset.org/abstracts/search?q=BDS%20%28BeiDou%20Navigation%20Satellite%20System%29" title=" BDS (BeiDou Navigation Satellite System)"> BDS (BeiDou Navigation Satellite System)</a>, <a href="https://publications.waset.org/abstracts/search?q=dual-antenna" title=" dual-antenna"> dual-antenna</a>, <a href="https://publications.waset.org/abstracts/search?q=integrated%20navigation" title=" integrated navigation"> integrated navigation</a> </p> <a href="https://publications.waset.org/abstracts/97626/a-short-baseline-dual-antenna-bdsmems-imu-integrated-navigation-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97626.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">5694</span> Study on the Application of Lime to Improve the Rheological Properties of Polymer Modified Bitumen</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Chegenizadeh">A. Chegenizadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Keramatikerman"> M. Keramatikerman</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Nikraz"> H. Nikraz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Bitumen is one of the most applicable materials in pavement engineering. It is a binding material with unique viscoelastic properties, especially when it mixes with polymer. In this study, to figure out the viscoelastic behaviour of the polymer modified with bitumen (PMB), a series of dynamic shearing rheological (DSR) tests were conducted. Four percentages of lime (i.e. 1%, 2%, 4% and 5%) were mixed with PMB and tested under four different temperatures including 64ºC, 70ºC, 76ºC and 82ºC. The results indicated that complex shearing modulus (G*) increased by increasing the frequency due to raised resistance against deformation. The phase angle (δ) showed a decreasing trend by incrementing the frequency. The addition of lime percentages increased the complex modulus value and declined phase angle parameter. Increasing the temperature decreased the complex modulus and increased the phase angle until 70ºC. The decreasing trend of rutting factor with increasing temperature revealed that rutting factor improved by the addition of the lime to the PMB. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rheological%20properties" title="rheological properties">rheological properties</a>, <a href="https://publications.waset.org/abstracts/search?q=DSR%20test" title=" DSR test"> DSR test</a>, <a href="https://publications.waset.org/abstracts/search?q=polymer%20mixed%20with%20bitumen%20%28PMB%29" title=" polymer mixed with bitumen (PMB)"> polymer mixed with bitumen (PMB)</a>, <a href="https://publications.waset.org/abstracts/search?q=complex%20modulus" title=" complex modulus"> complex modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=lime" title=" lime"> lime</a> </p> <a href="https://publications.waset.org/abstracts/83817/study-on-the-application-of-lime-to-improve-the-rheological-properties-of-polymer-modified-bitumen" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83817.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">188</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">5693</span> A Grid Synchronization Phase Locked Loop Method for Grid-Connected Inverters Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Naima%20Ikken">Naima Ikken</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelhadi%20Bouknadel"> Abdelhadi Bouknadel</a>, <a href="https://publications.waset.org/abstracts/search?q=Nour-eddine%20Tariba%20Ahmed%20Haddou"> Nour-eddine Tariba Ahmed Haddou</a>, <a href="https://publications.waset.org/abstracts/search?q=Hafsa%20El%20Omari"> Hafsa El Omari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The operation of grid-connected inverters necessity a single-phase phase locked loop (PLL) is proposed in this article to accurately and quickly estimate and detect the grid phase angle. This article presents the improvement of a method of phase-locked loop. The novelty is to generate a method (PLL) of synchronizing the grid with a Notch filter based on adaptive fuzzy logic for inverter systems connected to the grid. The performance of the proposed method was tested under normal and abnormal operating conditions (amplitude, frequency and phase shift variations). In addition, simulation results with ISPM software are developed to verify the effectiveness of the proposed method strategy. Finally, the experimental test will be used to extract the result and discuss the validity of the proposed algorithm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=phase%20locked%20loop" title="phase locked loop">phase locked loop</a>, <a href="https://publications.waset.org/abstracts/search?q=PLL" title=" PLL"> PLL</a>, <a href="https://publications.waset.org/abstracts/search?q=notch%20filter" title=" notch filter"> notch filter</a>, <a href="https://publications.waset.org/abstracts/search?q=fuzzy%20logic%20control" title=" fuzzy logic control"> fuzzy logic control</a>, <a href="https://publications.waset.org/abstracts/search?q=grid%20connected%20inverters" title=" grid connected inverters"> grid connected inverters</a> </p> <a href="https://publications.waset.org/abstracts/127186/a-grid-synchronization-phase-locked-loop-method-for-grid-connected-inverters-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/127186.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">5692</span> Evaluation of Mango Seed Extract as Surfactant for Enhanced Oil Recovery</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ezzaddin%20Rashid%20Hussein">Ezzaddin Rashid Hussein</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research investigates the viability of mango seed extract (MSE) using a surfactant to improve oil recovery (EOR). This research examines MSE-based surfactant solutions and compares them to more traditional synthetic surfactants in terms of phase behaviour and interfacial tension. The phase behaviour and interfacial tension of five samples of surfactant solutions with different concentrations were measured. Samples 1 (2.0 g) and 1 (1.5 g) performed closest to the critical micelle concentration (CMC) and displayed the greatest decrease in surface tension, according to the results. In addition, the measurement of IFT, contact angle, and pH, as well as comparison with prior research, highlights the potential environmental benefits of MSMEs as an eco-friendly alternative. It is recommended that additional research be conducted to assess their stability and behaviour under reservoir conditions. Overall, mango seed extract demonstrates promise as a natural and sustainable surfactant for enhancing oil recovery, paving the way for eco-friendly enhanced oil recovery techniques. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=oil%20and%20gas" title="oil and gas">oil and gas</a>, <a href="https://publications.waset.org/abstracts/search?q=mango%20seed%20powder" title=" mango seed powder"> mango seed powder</a>, <a href="https://publications.waset.org/abstracts/search?q=surfactants" title=" surfactants"> surfactants</a>, <a href="https://publications.waset.org/abstracts/search?q=enhanced%20oil%20recovery" title=" enhanced oil recovery"> enhanced oil recovery</a>, <a href="https://publications.waset.org/abstracts/search?q=interfacial%20tension%20IFT" title=" interfacial tension IFT"> interfacial tension IFT</a>, <a href="https://publications.waset.org/abstracts/search?q=wettability" title=" wettability"> wettability</a>, <a href="https://publications.waset.org/abstracts/search?q=contacts%20angle" title=" contacts angle"> contacts angle</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20behavior" title=" phase behavior"> phase behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=pH" title=" pH"> pH</a> </p> <a href="https://publications.waset.org/abstracts/170803/evaluation-of-mango-seed-extract-as-surfactant-for-enhanced-oil-recovery" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/170803.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">79</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">5691</span> Theoretical Study on the Forced Vibration of One Degree of Freedom System, Equipped with Inerter, under Load-Type or Displacement-Type Excitation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Barenten%20Suciu">Barenten Suciu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, a theoretical study on the forced vibration of one degree of freedom system equipped with inerter, working under load-type or displacement-type excitation, is presented. Differential equations of movement are solved under cosinusoidal excitation, and explicit relations for the magnitude, resonant magnitude, phase angle, resonant frequency, and critical frequency are obtained. Influence of the inertance and damping on these dynamic characteristics is clarified. From the obtained results, one concludes that the inerter increases the magnitude of vibration and the phase angle of the damped mechanical system. Moreover, the magnitude ratio and difference of phase angles are not depending on the actual type of excitation. Consequently, such kind of similitude allows for the comparison of various theoretical and experimental results, which can be broadly found in the literature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=displacement-type%20excitation" title="displacement-type excitation">displacement-type excitation</a>, <a href="https://publications.waset.org/abstracts/search?q=inerter" title=" inerter"> inerter</a>, <a href="https://publications.waset.org/abstracts/search?q=load-type%20excitation" title=" load-type excitation"> load-type excitation</a>, <a href="https://publications.waset.org/abstracts/search?q=one%20degree%20of%20freedom%20vibration" title=" one degree of freedom vibration"> one degree of freedom vibration</a>, <a href="https://publications.waset.org/abstracts/search?q=parallel%20connection" title=" parallel connection"> parallel connection</a> </p> <a href="https://publications.waset.org/abstracts/90102/theoretical-study-on-the-forced-vibration-of-one-degree-of-freedom-system-equipped-with-inerter-under-load-type-or-displacement-type-excitation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90102.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">216</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">5690</span> Performance Improvement of Photovoltaic Module at Different Tilt Angle in Kuwait</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hussain%20Bunyan">Hussain Bunyan</a>, <a href="https://publications.waset.org/abstracts/search?q=Wesam%20Ali"> Wesam Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper we will study the performance of a Silicon Photovoltaic (PV) system with different tilt angle arrangement in Kuwait (latitude 30˚ N). In this study the PV system is installed facing south, collecting maximum solar radiation at noon, and their angles are from 00 to 900 respectively, during full year at the Solstice and Equinox periods and aiming for a higher angle than 300 with competitive output power. The results show that the performance and the output power of the PV system with 50˚ tilt angle, is equivalent to the latitude tilt angle (30˚) during a full year. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=photovoltaic%20model" title="photovoltaic model">photovoltaic model</a>, <a href="https://publications.waset.org/abstracts/search?q=tilt%20angle" title=" tilt angle"> tilt angle</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20collector" title=" solar collector"> solar collector</a>, <a href="https://publications.waset.org/abstracts/search?q=PV%20system%20performance" title=" PV system performance"> PV system performance</a>, <a href="https://publications.waset.org/abstracts/search?q=State%20of%20Kuwait" title=" State of Kuwait"> State of Kuwait</a> </p> <a href="https://publications.waset.org/abstracts/14874/performance-improvement-of-photovoltaic-module-at-different-tilt-angle-in-kuwait" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14874.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">514</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">5689</span> 3D Hybrid Multiphysics Lattice Boltzmann Model for Studying the Flow Behavior of Emulsions in Structured Rectangular Microchannels</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Luma%20Al-Tamimi">Luma Al-Tamimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hassan%20Farhat"> Hassan Farhat</a>, <a href="https://publications.waset.org/abstracts/search?q=Wessam%20Hasan"> Wessam Hasan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A three-dimensional (3D) hybrid quasi-steady thermal lattice Boltzmann model is developed to couple the effects of surfactant, temperature, interfacial tension, and contact angle. This 3D model is an extended scheme of a previously introduced two-dimensional (2D) hybrid lattice Boltzmann model. The 3D model is used to study the combined multi-physics effects on emulsion systems flowing in rectangular microchannels with and without confinements, where the suspended phase is made of droplets, plugs, or a mixture of both. The simulation results show that emulsion systems with plugs as the suspended phase are more efficient than with droplets, whereas mixed systems that form large plugs through coalescence have even greater efficiency. The 3D contact angle model generates matching results to those of the 2D model, which were validated with experiments. Furthermore, the effects of various confinements on adhering single drop systems are investigated for delineating their influence on the power required for transporting the suspended phase through the channel. It is shown that the deeper the constriction is, the lower the system efficiency. Increasing the surfactant concentration or fluid temperature in a channel with confinement carries a substantial positive effect on oil droplet transportation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lattice%20Boltzmann%20method" title="lattice Boltzmann method">lattice Boltzmann method</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal" title=" thermal"> thermal</a>, <a href="https://publications.waset.org/abstracts/search?q=contact%20angle" title=" contact angle"> contact angle</a>, <a href="https://publications.waset.org/abstracts/search?q=surfactants" title=" surfactants"> surfactants</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20viscosity%20ratio" title=" high viscosity ratio"> high viscosity ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=porous%20media" title=" porous media"> porous media</a> </p> <a href="https://publications.waset.org/abstracts/143391/3d-hybrid-multiphysics-lattice-boltzmann-model-for-studying-the-flow-behavior-of-emulsions-in-structured-rectangular-microchannels" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143391.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">175</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">5688</span> Aerodynamic Investigation of Rear Vehicle by Geometry Variations on the Backlight Angle</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saud%20Hassan">Saud Hassan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper shows simulation for the prediction of the flow around the backlight angle of the passenger vehicle. The CFD simulations are carried out on different car models. The Ahmed model “bluff body” used as the stander model to study aerodynamics of the backlight angle. This paper described the airflow over the different car models with different backlight angles and also on the Ahmed model to determine the trailing vortices with the varying backlight angle of a passenger vehicle body. The CFD simulation is carried out with the Ahmed body which has simplified car model mainly used in automotive industry to investigate the flow over the car body surface. The main goal of the simulation is to study the behavior of trailing vortices of these models. In this paper the air flow over the slant angle of 0,5o, 12.5o, 20o, 30o, 40o are considered. As investigating on the rear backlight angle two dimensional flows occurred at the rear slant, on the other hand when the slant angle is 30o the flow become three dimensional. Above this angle sudden drop occurred in drag. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aerodynamics" title="aerodynamics">aerodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahemd%20vehicle" title=" Ahemd vehicle "> Ahemd vehicle </a>, <a href="https://publications.waset.org/abstracts/search?q=backlight%20angle" title=" backlight angle"> backlight angle</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20method" title=" finite element method "> finite element method </a> </p> <a href="https://publications.waset.org/abstracts/26384/aerodynamic-investigation-of-rear-vehicle-by-geometry-variations-on-the-backlight-angle" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26384.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">781</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">5687</span> Correlation between Flexible Flatfoot and Lumbosacral Angle</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Moustafa%20Elwan">Moustafa Elwan</a>, <a href="https://publications.waset.org/abstracts/search?q=Sohier%20Shehata"> Sohier Shehata</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatma%20Sedek"> Fatma Sedek</a>, <a href="https://publications.waset.org/abstracts/search?q=Manar%20Hussine"> Manar Hussine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the most risky factors that lead to a foot injury during physical activities are both high and low arched feet. Normally the medial longitudinal arch of the foot develops in the first 10 years of life, so flexible flat foot has an inversely relationship with age in the first decade, all over the world, the prevalence of flat foot is increasing. In approximately 15% of foot deformities cases, the deformity does not disappear and remains throughout adulthood, 90% of the clinical cases are complaining from foot problems are due to flatfoot. Flatfoot creates subtalar over pronation, which creates tibial and femoral medial rotation, and that is accompanied with increases of pelvic tilting anteriorly, which may influence the lumbar vertebrae alignment by increasing muscle tension and rotation. Objective: To study the impact of the flexible flatfoot on lumbosacral angle (angle of Ferguson). Methods: This experiment included 40 volunteers (14 females &26 males) gathered from the Faculty of Physical Therapy, Modern University of Technology and Information, Cairo, Egypt, for each participant, four angles were measured in the foot( talar first metatarsal angle, lateral talocalcaneal angle, , Calcaneal first metatarsal angle, calcaneal inclination angle) and one angle in the lumbar region (lumbosacral angle). Measurement of these angles was conducted by using Surgimap Spine software (version 2.2.9.6). Results: The results demonstrated that there was no significant correlation betweenFerguson angle and lateral talocalcaneal (r=0.164, p=0.313). Also, there was no significant correlation between Ferguson angle and talo first metatarsal “Meary’s angle" (r=0.007, p=0.968). Moreover, there was no significant correlation between Ferguson angle and calcaneal-first metatarsal angle (r=0.083, p=0.612). Also, there was no significant correlation between Ferguson angle and calcaneal inclination angle (r= 0.032, p= 0.846). Conclusion: It can be concluded that there is no significant correlation between the flexible flat foot and lumbosacral angle So, more study should be conducted in large sample and different ages and conditions of foot problems. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=calcaneal%20first%20metatarsal" title="calcaneal first metatarsal">calcaneal first metatarsal</a>, <a href="https://publications.waset.org/abstracts/search?q=calcaneal%20inclination" title=" calcaneal inclination"> calcaneal inclination</a>, <a href="https://publications.waset.org/abstracts/search?q=flatfoot" title=" flatfoot"> flatfoot</a>, <a href="https://publications.waset.org/abstracts/search?q=ferguson%E2%80%99s%20angle" title=" ferguson’s angle"> ferguson’s angle</a>, <a href="https://publications.waset.org/abstracts/search?q=lateral%20talocalcaneal%20angle" title=" lateral talocalcaneal angle"> lateral talocalcaneal angle</a>, <a href="https://publications.waset.org/abstracts/search?q=lumbosacral%20angle" title=" lumbosacral angle"> lumbosacral angle</a>, <a href="https://publications.waset.org/abstracts/search?q=and%20talar%20first%20metatarsal%20angle" title=" and talar first metatarsal angle"> and talar first metatarsal angle</a> </p> <a href="https://publications.waset.org/abstracts/155584/correlation-between-flexible-flatfoot-and-lumbosacral-angle" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/155584.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">133</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">5686</span> Definition of Service Angle of Android’S Robot Hand by Method of Small Movements of Gripper’S Axis Synthesis by Speed Vector</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Valeriy%20Nebritov">Valeriy Nebritov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper presents a generalized method for determining the service solid angle based on the assigned gripper axis orientation with a stationary grip center. Motion synthesis in this work is carried out in the vector of velocities. As an example, a solid angle of the android robot arm is determined, this angle being formed by the longitudinal axis of a gripper. The nature of the method is based on the study of sets of configuration positions, defining the end point positions of the unit radius sphere sweep, which specifies the service solid angle. From this the spherical curve specifying the shape of the desired solid angle was determined. The results of the research can be used in the development of control systems of autonomous android robots. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=android%20robot" title="android robot">android robot</a>, <a href="https://publications.waset.org/abstracts/search?q=control%20systems" title=" control systems"> control systems</a>, <a href="https://publications.waset.org/abstracts/search?q=motion%20synthesis" title=" motion synthesis"> motion synthesis</a>, <a href="https://publications.waset.org/abstracts/search?q=service%20angle" title=" service angle"> service angle</a> </p> <a href="https://publications.waset.org/abstracts/105865/definition-of-service-angle-of-androids-robot-hand-by-method-of-small-movements-of-grippers-axis-synthesis-by-speed-vector" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/105865.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">196</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">5685</span> Numerical Study on the Effect of Obstacle Structure on Two-Phase Detonation Initiation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ding%20Yu">Ding Yu</a>, <a href="https://publications.waset.org/abstracts/search?q=Ge%20Yang"> Ge Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Wang%20Hong-Tao"> Wang Hong-Tao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aiming at the detonation performance and detonation wave propagation distance of liquid fuel detonation engine, the kerosene/oxygen-enriched air mixture is chosen as the research object; its detonation initiation and detonation wave propagation process by mild energy input are numerically studied by using Euler-Lagrange method in the present study. The effects of a semicircular obstacle, rectangular obstacle, and triangular obstacle on the detonation characteristic parameters in the detonation tube are compared and analyzed, and the effect of the angle between obstacle and flame propagation direction on flame propagation characteristics and detonation process when the blocking ratio is constant are studied. The results show that the flame propagation velocity decreases with the increase of the angle in the range of 0-90°, and when the angle is 0° which corresponds to the semicircle obstacle gets the highest detonation wave propagation velocity. With the increase of the angle in the range of 0-90°, DDT (Deflagration to detonation transition) distance decreases first and then increases. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=deflagration%20to%20detonation%20transition" title="deflagration to detonation transition">deflagration to detonation transition</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20simulation" title=" numerical simulation"> numerical simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=obstacle%20structure" title=" obstacle structure"> obstacle structure</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulent%20flame" title=" turbulent flame"> turbulent flame</a> </p> <a href="https://publications.waset.org/abstracts/165628/numerical-study-on-the-effect-of-obstacle-structure-on-two-phase-detonation-initiation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165628.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">82</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">5684</span> Performance of Photovoltaic Module at Different Tilt Angles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hussain%20Bunyan">Hussain Bunyan</a>, <a href="https://publications.waset.org/abstracts/search?q=Wesam%20Ali"> Wesam Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper we will study the performance of a Silicon Photovoltaic (PV) system with different tilt angle arrangement in Kuwait (latitude 30˚ N). In the study the PV system is installed facing South, collecting maximum solar radiation at noon, and their angles are from 00 to 900 respectively, during full year at the Solstice and Equinox periods, aiming for a higher angle than 300 with competitive output power. The results show that the performance and the output power of the PV system with 50˚ tilt angle, is equivalent to the latitude tilt angle (30˚) during a full year. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=photovoltaic%20model" title="photovoltaic model">photovoltaic model</a>, <a href="https://publications.waset.org/abstracts/search?q=tilt%20angle" title=" tilt angle"> tilt angle</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20collector" title=" solar collector"> solar collector</a>, <a href="https://publications.waset.org/abstracts/search?q=PV%20system%20performance" title=" PV system performance"> PV system performance</a>, <a href="https://publications.waset.org/abstracts/search?q=State%20of%20Kuwait" title=" State of Kuwait "> State of Kuwait </a> </p> <a href="https://publications.waset.org/abstracts/17334/performance-of-photovoltaic-module-at-different-tilt-angles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17334.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">491</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">5683</span> Optimization of Tilt Angle for Solar Collectors: A Case Study for Bursa, Turkey</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Arslanoglu">N. Arslanoglu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper deals with the optimum tilt angle for the solar collector in order to collect the maximum solar radiation. The optimum angle for tilted surfaces varying from 0<sup>◦</sup> to 90<sup>◦</sup> in steps of 1<sup>◦ </sup>was computed. In present study, a theoretical model is used to predict the global solar radiation on a tilted surface and to obtain the optimum tilt angle for a solar collector in Bursa, Turkey. Global solar energy radiation on the solar collector surface with an optimum tilt angle is calculated for specific periods. It is determined that the optimum slope angle varies between 0<sup>◦</sup> (June) and 59<sup>◦</sup> (December) throughout the year. In winter (December, January, and February) the tilt should be 55<sup>◦</sup>, in spring (March, April, and May) 19.6<sup>◦</sup>, in summer (June, July, and August) 5.6<sup>◦</sup>, and in autumn (September, October, and November) 44.3<sup>◦</sup>. The yearly average of this value was obtained to be 31.1<sup>◦</sup> and this would be the optimum fixed slope throughout the year. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bursa" title="Bursa">Bursa</a>, <a href="https://publications.waset.org/abstracts/search?q=global%20solar%20radiation" title=" global solar radiation"> global solar radiation</a>, <a href="https://publications.waset.org/abstracts/search?q=optimum%20tilt%20angle" title=" optimum tilt angle"> optimum tilt angle</a>, <a href="https://publications.waset.org/abstracts/search?q=tilted%20surface" title=" tilted surface"> tilted surface</a> </p> <a href="https://publications.waset.org/abstracts/49458/optimization-of-tilt-angle-for-solar-collectors-a-case-study-for-bursa-turkey" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49458.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">260</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">5682</span> Simulation and Analytical Investigation of Different Combination of Single Phase Power Transformers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Salih%20Taci">M. Salih Taci</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Tayebi"> N. Tayebi</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Bozk%C4%B1r"> I. Bozkır</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the equivalent circuit of the ideal single-phase power transformer with its appropriate voltage current measurement was presented. The calculated values of the voltages and currents of the different connections single phase normal transformer and the results of the simulation process are compared. As it can be seen, the calculated results are the same as the simulated results. This paper includes eight possible different transformer connections. Depending on the desired voltage level, step-down and step-up application transformer is considered. Modelling and analysis of a system consisting of an equivalent source, transformer (primary and secondary), and loads are performed to investigate the combinations. The obtained values are simulated in PSpice environment and then how the currents, voltages and phase angle are distributed between them is explained based on calculation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=transformer" title="transformer">transformer</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=equivalent%20model" title=" equivalent model"> equivalent model</a>, <a href="https://publications.waset.org/abstracts/search?q=parallel%20series%20combinations" title=" parallel series combinations"> parallel series combinations</a> </p> <a href="https://publications.waset.org/abstracts/76621/simulation-and-analytical-investigation-of-different-combination-of-single-phase-power-transformers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76621.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">361</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">5681</span> Measurement of the Quadriceps Angle with Respect to Various Body Parameters in Arab Countries</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ramada%20R.%20Khasawneh">Ramada R. Khasawneh</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20Z.%20Allouh"> Mohammed Z. Allouh</a>, <a href="https://publications.waset.org/abstracts/search?q=Ejlal%20Abu-El%20Rub"> Ejlal Abu-El Rub</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The quadriceps angle (Q angle), formed between the quadriceps muscles and the patella tendon, is considered clinically as a very important parameter which displays the biomechanical effect of the quadriceps muscle on the knee, and it is also regarded as a crucial factor for the proper posture and movement of the knee patella. This study had been conducted to measure the normal Q angle values range in the Arab nationalities and determine the correlation between Q angle values and several body parameters, including gender, height, weight, dominant side, and the condylar distance of the femur. The study includes 500 healthy Arab students from Yarmouk University and Jordan University of Science and Technology. The Q angle of those volunteers was measured using a universal manual Goniometer with the subjects in the upright weight-bearing position. It was found that the Q angle was greater in women than in men. The analysis of the data revealed an insignificant increase in the dominant side of the Q angle. In addition, the Q was significantly higher in the taller people of both sexes. However, the Q angle did not present any considerable correlation with weight in the study population; conversely, it was observed that there was a link with the condylar distance of the femur in both sexes. It was also noticed that the Q angle increased remarkably when there was an increase in the condylar distance. Consequently, it turned out that the gender, height, and the condylar distance were momentous factors that had an impact on the Q angle in our study samples. However, weight and dominance factors did not show to have any influence on the values in our study. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Q%20angle" title="Q angle">Q angle</a>, <a href="https://publications.waset.org/abstracts/search?q=Jordanian" title=" Jordanian"> Jordanian</a>, <a href="https://publications.waset.org/abstracts/search?q=anatomy" title=" anatomy"> anatomy</a>, <a href="https://publications.waset.org/abstracts/search?q=condylar%20distance" title=" condylar distance"> condylar distance</a> </p> <a href="https://publications.waset.org/abstracts/109735/measurement-of-the-quadriceps-angle-with-respect-to-various-body-parameters-in-arab-countries" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/109735.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">146</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">5680</span> Hybrid GA-PSO Based Pitch Controller Design for Aircraft Control System </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vaibhav%20Singh%20%20Rajput">Vaibhav Singh Rajput</a>, <a href="https://publications.waset.org/abstracts/search?q=Ravi%20Kumar%20Jatoth"> Ravi Kumar Jatoth</a>, <a href="https://publications.waset.org/abstracts/search?q=Nagu%20Bhookya"> Nagu Bhookya</a>, <a href="https://publications.waset.org/abstracts/search?q=Bhasker%20Boda"> Bhasker Boda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper proportional, integral, derivative (PID) controller is used to control the pitch angle of the aircraft when the elevation angle is changed or modified. The pitch angle is dependent on elevation angle; a change in one corresponds to a change in the other. The PID controller helps in restricted change of pitch rate in response to the elevation angle. The PID controller is dependent on different parameters like Kp, Ki, Kd which change the pitch rate as they change. Various methodologies are used for changing those parameters for getting a perfect time response pitch angle, as desired or wished by a concerned person. While reckoning the values of those parameters, trial and guessing may prove to be futile in order to provide comfort to passengers. So, using some metaheuristic techniques can be useful in handling these errors. Hybrid GA-PSO is one such powerful algorithm which can improve transient and steady state response and can give us more reliable results for PID gain scheduling problem. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pitch%20rate" title="pitch rate">pitch rate</a>, <a href="https://publications.waset.org/abstracts/search?q=elevation%20angle" title=" elevation angle"> elevation angle</a>, <a href="https://publications.waset.org/abstracts/search?q=PID%20controller" title=" PID controller"> PID controller</a>, <a href="https://publications.waset.org/abstracts/search?q=genetic%20algorithm" title=" genetic algorithm"> genetic algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=particle%20swarm%20optimization" title=" particle swarm optimization"> particle swarm optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=phugoid" title=" phugoid"> phugoid</a> </p> <a href="https://publications.waset.org/abstracts/64457/hybrid-ga-pso-based-pitch-controller-design-for-aircraft-control-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/64457.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">327</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5679</span> The Correlation between Head of Bed Angle and IntraAbdominal Pressure of Intubated Patients; a Pre-Post Clinical Trial</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sedigheh%20Samimian">Sedigheh Samimian</a>, <a href="https://publications.waset.org/abstracts/search?q=Sadra%20Ashrafi"> Sadra Ashrafi</a>, <a href="https://publications.waset.org/abstracts/search?q=Tahereh%20Khaleghdoost%20Mohammadi"> Tahereh Khaleghdoost Mohammadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Reza%20Yeganeh"> Mohammad Reza Yeganeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Ashraf"> Ali Ashraf</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamideh%20Hakimi"> Hamideh Hakimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Maryam%20Dehghani"> Maryam Dehghani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: The recommended position for measuring Intra-Abdominal Pressure (IAP) is the supine position. However, patients put in this position are prone to Ventilator-associated pneumonia. This study was done to evaluate the relationship between bed head angle and IAP measurements of intubated patients in the intensive care unit. Methods: In this clinical trial, seventy-six critically ill patients under mechanical ventilation were enrolled. IAP measurement was performed every 8 hours for 24 hours using the KORN method in three different degrees of the head of bed (HOB) elevation (0°, 15°, and 30°). Bland-Altman analysis was performed to identify the bias and limits of agreement among the three HOBs. According to World Society of the Abdominal Compartment Syndrome (WSACS), we can consider two IAP techniques equivalent if a bias of <1 mmHg and limits of agreement of - 4 to +4 were found between them. Data were analyzed using SPSS statistical software (v. 19), and the significance level was considered as 0.05. Results: The prevalence of intra-abdominal hypertension was 18.42%. Mean ± standard deviation (SD) of IAP were 8.44 ± 4.02 mmHg for HOB angle 0°, 9.58 ± 4.52 for HOB angle 15°, and 11.10 ± 4.73 for HOB angle 30o (p = 0.0001). The IAP measurement bias between HOB angle 0◦ and HOB angle 15° was 1.13 mmHg. This bias was 2.66 mmHg between HOB angle 0° and HOB angle 30°. Conclusion: Elevation of HOB angle from 0 to 30 degree significantly increases IAP. It seems that the measurement of IAP at HOB angle 15° was more reliable than 30°. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pressure" title="pressure">pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=intra-abdominal%20hypertension" title=" intra-abdominal hypertension"> intra-abdominal hypertension</a>, <a href="https://publications.waset.org/abstracts/search?q=head%20of%20bed" title=" head of bed"> head of bed</a>, <a href="https://publications.waset.org/abstracts/search?q=critical%20care" title=" critical care"> critical care</a>, <a href="https://publications.waset.org/abstracts/search?q=compartment%20syndrome" title=" compartment syndrome"> compartment syndrome</a>, <a href="https://publications.waset.org/abstracts/search?q=supine%20position" title=" supine position"> supine position</a> </p> <a href="https://publications.waset.org/abstracts/183409/the-correlation-between-head-of-bed-angle-and-intraabdominal-pressure-of-intubated-patients-a-pre-post-clinical-trial" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/183409.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">69</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">5678</span> Pythagorean-Platonic Lattice Method for Finding all Co-Prime Right Angle Triangles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anthony%20Overmars">Anthony Overmars</a>, <a href="https://publications.waset.org/abstracts/search?q=Sitalakshmi%20Venkatraman"> Sitalakshmi Venkatraman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a method for determining all of the co-prime right angle triangles in the Euclidean field by looking at the intersection of the Pythagorean and Platonic right angle triangles and the corresponding lattice that this produces. The co-prime properties of each lattice point representing a unique right angle triangle are then considered. This paper proposes a conjunction between these two ancient disparaging theorists. This work has wide applications in information security where cryptography involves improved ways of finding tuples of prime numbers for secure communication systems. In particular, this paper has direct impact in enhancing the encryption and decryption algorithms in cryptography. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pythagorean%20triples" title="Pythagorean triples">Pythagorean triples</a>, <a href="https://publications.waset.org/abstracts/search?q=platonic%20triples" title=" platonic triples"> platonic triples</a>, <a href="https://publications.waset.org/abstracts/search?q=right%20angle%20triangles" title=" right angle triangles"> right angle triangles</a>, <a href="https://publications.waset.org/abstracts/search?q=co-prime%20numbers" title=" co-prime numbers"> co-prime numbers</a>, <a href="https://publications.waset.org/abstracts/search?q=cryptography" title=" cryptography"> cryptography</a> </p> <a href="https://publications.waset.org/abstracts/80590/pythagorean-platonic-lattice-method-for-finding-all-co-prime-right-angle-triangles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/80590.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">239</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">5677</span> Voltage Sag Characteristics during Symmetrical and Asymmetrical Faults</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ioannis%20Binas">Ioannis Binas</a>, <a href="https://publications.waset.org/abstracts/search?q=Marios%20Moschakis"> Marios Moschakis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Electrical faults in transmission and distribution networks can have great impact on the electrical equipment used. Fault effects depend on the characteristics of the fault as well as the network itself. It is important to anticipate the network’s behavior during faults when planning a new equipment installation, as well as troubleshooting. Moreover, working backwards, we could be able to estimate the characteristics of the fault when checking the perceived effects. Different transformer winding connections dominantly used in the Greek power transfer and distribution networks and the effects of 1-phase to neutral, phase-to-phase, 2-phases to neutral and 3-phase faults on different locations of the network were simulated in order to present voltage sag characteristics. The study was performed on a generic network with three steps down transformers on two voltage level buses (one 150 kV/20 kV transformer and two 20 kV/0.4 kV). We found that during faults, there are significant changes both on voltage magnitudes and on phase angles. The simulations and short-circuit analysis were performed using the PSCAD simulation package. This paper presents voltage characteristics calculated for the simulated network, with different approaches on the transformer winding connections during symmetrical and asymmetrical faults on various locations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Phase%20angle%20shift" title="Phase angle shift">Phase angle shift</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20quality" title=" power quality"> power quality</a>, <a href="https://publications.waset.org/abstracts/search?q=transformer%20winding%20connections" title=" transformer winding connections"> transformer winding connections</a>, <a href="https://publications.waset.org/abstracts/search?q=voltage%20sag%20propagation" title=" voltage sag propagation"> voltage sag propagation</a> </p> <a href="https://publications.waset.org/abstracts/123004/voltage-sag-characteristics-during-symmetrical-and-asymmetrical-faults" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/123004.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">139</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">5676</span> Relationship Between Dynamic Balance, Jumping Performance and Q-angle in Soccer Players</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tarik%20Ozmen">Tarik Ozmen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The soccer players need good dynamic balance and jumping performance for dribbling, crossing rival, and to be effective in high balls during soccer game. The quadriceps angle (Q-angle) is used to assess biomechanics of the patellofemoral joint in the musculoskeletal medicine. The Q angle is formed by the intersection of two lines drawing from the anterior superior iliac spine to the centre of the patella and to the midline of the tibia tuberosity. Studies have shown that the Q angle is inversely associated with quadriceps femoris strength. The purpose of this study was to investigate relationship between dynamic balance, jumping performance and Q-angle in soccer players. Thirty male soccer players (mean ± SD: age, 15.23 ± 0.56 years, height, 170 ± 8.37 cm, weight, 61.36 ± 6.04 kg) participated as volunteer in this study. Dynamic balance of the participants were evaluated at directions of anterior (A), posteromedial (PM) and posterolateral (PL) with Star Excursion Balance Test (SEBT). Each participant was instructed to reach as far as with the non-dominant leg in each of the 3 directions while maintaining dominant leg stance. Leg length was used to normalize excursion distances by dividing the distance reached by leg length and then multiplying the result by 100. The jumping performance was evaluated by squat jump using a contact mat. A universal (standard) goniometer was used to measure the Q angle in standing position. The Q angle was not correlated with directions of SEBT (A: p = 0.32, PM: p = 0.06, PL: p = 0.37). The squat jump height was not correlated with Q-angle (p = 0.21). The findings of this study suggest that there are no significant relationships between dynamic balance, jumping performance and Q-angle in soccer players. Further studies should investigate relationship between balance ability, athletic performance and Q-angle with larger sample size in soccer players. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=balance" title="balance">balance</a>, <a href="https://publications.waset.org/abstracts/search?q=jump%20height" title=" jump height"> jump height</a>, <a href="https://publications.waset.org/abstracts/search?q=Q%20angle" title=" Q angle"> Q angle</a>, <a href="https://publications.waset.org/abstracts/search?q=soccer" title=" soccer"> soccer</a> </p> <a href="https://publications.waset.org/abstracts/50053/relationship-between-dynamic-balance-jumping-performance-and-q-angle-in-soccer-players" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50053.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">457</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">5675</span> Surface Modification of Poly High Internal Phase Emulsion by Solution Plasma Process for CO2 Adsorption</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mookyada%20Mankrut">Mookyada Mankrut</a>, <a href="https://publications.waset.org/abstracts/search?q=Manit%20Nithitanakul"> Manit Nithitanakul</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An increase in the amount of atmospheric carbon dioxide (CO2) resulting from anthropogenic CO2 emission has been a concerned problem so far. Adsorption using porous materials is feasible way to reduce the content of CO2 emission into the atmosphere due to several advantages: low energy consumption in regeneration process, low-cost raw materials and, high CO2 adsorption capacity. In this work, the porous poly(divinylbenzene) (poly(DVB)) support was synthesized under high internal phase emulsion (HIPE) polymerization then modified with polyethyleneimine (PEI) by using solution plasma process. These porous polymers were then used as adsorbents for CO2 adsorption study. All samples were characterized by some techniques: Fourier transform infrared spectroscopy (FT-IR), scanning electron spectroscopy (SEM), water contact angle measurement and, surface area analyzer. The results of FT-IR and a decrease in contact angle, pore volume and, surface area of PEI-loaded materials demonstrated that surface of poly(DVB) support was modified. In other words, amine groups were introduced to poly(DVB) surface. In addition, not only the outer surface of poly(DVB) adsorbent was modified, but also the inner structure as shown by FT-IR study. As a result, PEI-loaded materials exhibited higher adsorption capacity, comparing with those of the unmodified poly(DVB) support. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=polyHIPEs" title="polyHIPEs">polyHIPEs</a>, <a href="https://publications.waset.org/abstracts/search?q=CO2%20adsorption" title=" CO2 adsorption"> CO2 adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=solution%20plasma%20process" title=" solution plasma process"> solution plasma process</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20internal%20phase%20emulsion" title=" high internal phase emulsion"> high internal phase emulsion</a> </p> <a href="https://publications.waset.org/abstracts/66802/surface-modification-of-poly-high-internal-phase-emulsion-by-solution-plasma-process-for-co2-adsorption" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66802.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">273</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">5674</span> Re-Entrant Direct Hexagonal Phases in a Lyotropic System Induced by Ionic Liquids </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saheli%20Mitra">Saheli Mitra</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramesh%20Karri"> Ramesh Karri</a>, <a href="https://publications.waset.org/abstracts/search?q=Praveen%20K.%20Mylapalli"> Praveen K. Mylapalli</a>, <a href="https://publications.waset.org/abstracts/search?q=Arka.%20B.%20Dey"> Arka. B. Dey</a>, <a href="https://publications.waset.org/abstracts/search?q=Gourav%20Bhattacharya"> Gourav Bhattacharya</a>, <a href="https://publications.waset.org/abstracts/search?q=Gouriprasanna%20Roy"> Gouriprasanna Roy</a>, <a href="https://publications.waset.org/abstracts/search?q=Syed%20M.%20Kamil"> Syed M. Kamil</a>, <a href="https://publications.waset.org/abstracts/search?q=Surajit%20Dhara"> Surajit Dhara</a>, <a href="https://publications.waset.org/abstracts/search?q=Sunil%20K.%20Sinha"> Sunil K. Sinha</a>, <a href="https://publications.waset.org/abstracts/search?q=Sajal%20K.%20Ghosh"> Sajal K. Ghosh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The most well-known structures of lyotropic liquid crystalline systems are the two dimensional hexagonal phase of cylindrical micelles with a positive interfacial curvature and the lamellar phase of flat bilayers with zero interfacial curvature. In aqueous solution of surfactants, the concentration dependent phase transitions have been investigated extensively. However, instead of changing the surfactant concentrations, the local curvature of an aggregate can be altered by tuning the electrostatic interactions among the constituent molecules. Intermediate phases with non-uniform interfacial curvature are still unexplored steps to understand the route of phase transition from hexagonal to lamellar. Understanding such structural evolution in lyotropic liquid crystalline systems is important as it decides the complex rheological behavior of the system, which is one of the main interests of the soft matter industry. Sodium dodecyl sulfate (SDS) is an anionic surfactant and can be considered as a unique system to tune the electrostatics by cationic additives. In present study, imidazolium-based ionic liquids (ILs) with different number of carbon atoms in their single hydrocarbon chain were used as the additive in the aqueous solution of SDS. At a fixed concentration of total non-aqueous components (SDS and IL), the molar ratio of these components was changed, which effectively altered the electrostatic interactions between the SDS molecules. As a result, the local curvature is observed to modify, and correspondingly, the structure of the hexagonal liquid crystalline phases are transformed into other phases. Polarizing optical microscopy of SDS and imidazole-based-IL systems have exhibited different textures of the liquid crystalline phases as a function of increasing concentration of the ILs. The small angle synchrotron x-ray diffraction (SAXD) study has indicated the hexagonal phase of direct cylindrical micelles to transform to a rectangular phase at the presence of short (two hydrocarbons) chain IL. However, the hexagonal phase is transformed to a lamellar phase at the presence of long (ten hydrocarbons) chain IL. Interestingly, at the presence of a medium (four hydrocarbons) chain IL, the hexagonal phase is transformed to another hexagonal phase of direct cylindrical micelles through the lamellar phase. To the best of our knowledge, such a phase sequence has not been reported earlier. Even though the small angle x-ray diffraction study has revealed the lattice parameters of these phases to be similar to each other, their rheological behavior has been distinctly different. These rheological studies have shed lights on how these phases differ in their viscoelastic behavior. Finally, the packing parameters, calculated for these phases based on the geometry of the aggregates, have explained the formation of the self-assembled aggregates. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lyotropic%20liquid%20crystals" title="lyotropic liquid crystals">lyotropic liquid crystals</a>, <a href="https://publications.waset.org/abstracts/search?q=polarizing%20optical%20microscopy" title=" polarizing optical microscopy"> polarizing optical microscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=rheology" title=" rheology"> rheology</a>, <a href="https://publications.waset.org/abstracts/search?q=surfactants" title=" surfactants"> surfactants</a>, <a href="https://publications.waset.org/abstracts/search?q=small%20angle%20x-ray%20diffraction" title=" small angle x-ray diffraction"> small angle x-ray diffraction</a> </p> <a href="https://publications.waset.org/abstracts/104719/re-entrant-direct-hexagonal-phases-in-a-lyotropic-system-induced-by-ionic-liquids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/104719.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">138</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">5673</span> The Influence of Winding Angle on Functional Failure of FRP Pipes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Roham%20Rafiee">Roham Rafiee</a>, <a href="https://publications.waset.org/abstracts/search?q=Hadi%20Hesamsadat"> Hadi Hesamsadat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, a parametric finite element modeling is developed to analyze failure modes of FRP pipes subjected to internal pressure. First-ply failure pressure and functional failure pressure was determined by a progressive damage modeling and then it is validated using experimental observations. The influence of both winding angle and fiber volume fraction is studied on the functional failure of FRP pipes and it corresponding pressure. It is observed that despite the fact that increasing fiber volume fraction will enhance the mechanical properties, it will be resulted in lower values for functional failure pressure. This shortcoming can be compensated by modifying the winding angle in angle plies of pipe wall structure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=composite%20pipe" title="composite pipe">composite pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=functional%20failure" title=" functional failure"> functional failure</a>, <a href="https://publications.waset.org/abstracts/search?q=progressive%20modeling" title=" progressive modeling"> progressive modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=winding%20angle" title=" winding angle"> winding angle</a> </p> <a href="https://publications.waset.org/abstracts/1399/the-influence-of-winding-angle-on-functional-failure-of-frp-pipes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1399.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">5672</span> Tensile Properties of 3D Printed PLA under Unidirectional and Bidirectional Raster Angle: A Comparative Study </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shilpesh%20R.%20Rajpurohit">Shilpesh R. Rajpurohit</a>, <a href="https://publications.waset.org/abstracts/search?q=Harshit%20K.%20Dave"> Harshit K. Dave</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fused deposition modeling (FDM) gains popularity in recent times, due to its capability to create prototype as well as functional end use product directly from CAD file. Parts fabricated using FDM process have mechanical properties comparable with those of injection-molded parts. However, performance of the FDM part is severally affected by the poor mechanical properties of the part due to nature of layered structure of printed part. Mechanical properties of the part can be improved by proper selection of process variables. In the present study, a comparative study between unidirectional and bidirectional raster angle has been carried out at a combination of different layer height and raster width. Unidirectional raster angle varied at five different levels, and bidirectional raster angle has been varied at three different levels. Fabrication of tensile specimen and tensile testing of specimen has been conducted according to ASTM D638 standard. From the results, it can be observed that higher tensile strength has been obtained at 0° raster angle followed by 45°/45° raster angle, while lower tensile strength has been obtained at 90° raster angle. Analysis of fractured surface revealed that failure takes place along with raster deposition direction for unidirectional and zigzag failure can be observed for bidirectional raster angle. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=additive%20manufacturing" title="additive manufacturing">additive manufacturing</a>, <a href="https://publications.waset.org/abstracts/search?q=fused%20deposition%20modeling" title=" fused deposition modeling"> fused deposition modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=unidirectional" title=" unidirectional"> unidirectional</a>, <a href="https://publications.waset.org/abstracts/search?q=bidirectional" title=" bidirectional"> bidirectional</a>, <a href="https://publications.waset.org/abstracts/search?q=raster%20angle" title=" raster angle"> raster angle</a>, <a href="https://publications.waset.org/abstracts/search?q=tensile%20strength" title=" tensile strength"> tensile strength</a> </p> <a href="https://publications.waset.org/abstracts/86885/tensile-properties-of-3d-printed-pla-under-unidirectional-and-bidirectional-raster-angle-a-comparative-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/86885.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">185</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">5671</span> Experimental Investigations on Nanoclay (Cloisite-15A) Modified Bitumen</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ashish%20Kumar">Ashish Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Sanjeev%20Kumar%20Suman"> Sanjeev Kumar Suman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigated the influence of Cloisite-15A nanoclay on the physical, performance, and mechanical properties of bitumen binder. Cloisite-15A was blended in the bitumen in variegated percentages from 1% to 9% with increment of 2%. The blended bitumen was characterized using penetration, softening point, and dynamic viscosity using rotational viscometer, and compared with unmodified bitumen equally penetration grade 60/70. The rheological parameters were investigated using Dynamic Shear Rheometer (DSR), and mechanical properties were investigated by using Marshall Stability test. The results indicated an increase in softening point, dynamic viscosity and decrease in binder penetration. Rheological properties of bitumen increase complex modulus, decrease phase angle and improve rutting resistances as well. There was significant improvement in Marshall Stability, rather marginal improvement in flow value. The best improvement in the modified binder was obtained with 5% Cloisite-15A nanoclay. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cloisite-15A" title="Cloisite-15A">Cloisite-15A</a>, <a href="https://publications.waset.org/abstracts/search?q=complex%20shear%20modulus" title=" complex shear modulus"> complex shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20angle" title=" phase angle"> phase angle</a>, <a href="https://publications.waset.org/abstracts/search?q=rutting%20resistance" title=" rutting resistance"> rutting resistance</a> </p> <a href="https://publications.waset.org/abstracts/58589/experimental-investigations-on-nanoclay-cloisite-15a-modified-bitumen" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/58589.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> 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href="https://publications.waset.org/abstracts/search?q=phase%20angle&page=7">7</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=phase%20angle&page=8">8</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=phase%20angle&page=9">9</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=phase%20angle&page=10">10</a></li> <li class="page-item disabled"><span class="page-link">...</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=phase%20angle&page=189">189</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=phase%20angle&page=190">190</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=phase%20angle&page=2" rel="next">&rsaquo;</a></li> </ul> </div> </main> 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