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over-consolidation ratio</title> <meta name="description" content="Search results for: over-consolidation ratio"> <meta name="keywords" content="over-consolidation ratio"> <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 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="over-consolidation ratio"> <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> 4580</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: over-consolidation ratio</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4580</span> Evaluation of Internal Friction Angle in Overconsolidated Granular Soil Deposits Using P- and S-Wave Seismic Velocities</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ehsan%20Pegah">Ehsan Pegah</a>, <a href="https://publications.waset.org/abstracts/search?q=Huabei%20Liu"> Huabei Liu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Determination of the internal friction angle (φ) in natural soil deposits is an important issue in geotechnical engineering. The main objective of this study was to examine the evaluation of this parameter in overconsolidated granular soil deposits by using the P-wave velocity and the anisotropic components of S-wave velocity (i.e., both the vertical component (SV) and the horizontal component (SH) of S-wave). To this end, seventeen pairs of P-wave and S-wave seismic refraction profiles were carried out at three different granular sites in Iran using non-invasive seismic wave methods. The acquired shot gathers were processed, from which the P-wave, SV-wave and SH-wave velocities were derived. The reference values of φ and overconsolidation ratio (OCR) in the soil deposits were measured through laboratory tests. By assuming cross-anisotropy of the soils, the P-wave and S-wave velocities were utilized to develop an equation for calculating the coefficient of lateral earth pressure at-rest (K₀) based on the theory of elasticity for a cross-anisotropic medium. In addition, to develop an equation for OCR estimation in granular geomaterials in terms of SH/SV velocity ratios, a general regression analysis was performed on the resulting information from this research incorporated with the respective data published in the literature. The calculated K₀ values coupled with the estimated OCR values were finally employed in the Mayne and Kulhawy formula to evaluate φ in granular soil deposits. The results showed that reliable values of φ could be estimated based on the seismic wave velocities. The findings of this study may be used as the appropriate approaches for economic and non-invasive determination of in-situ φ in granular soil deposits using the surface seismic surveys. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=angle%20of%20internal%20friction" title="angle of internal friction">angle of internal friction</a>, <a href="https://publications.waset.org/abstracts/search?q=overconsolidation%20ratio" title=" overconsolidation ratio"> overconsolidation ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=granular%20soils" title=" granular soils"> granular soils</a>, <a href="https://publications.waset.org/abstracts/search?q=P-wave%20velocity" title=" P-wave velocity"> P-wave velocity</a>, <a href="https://publications.waset.org/abstracts/search?q=SV-wave%20velocity" title=" SV-wave velocity"> SV-wave velocity</a>, <a href="https://publications.waset.org/abstracts/search?q=SH-wave%20velocity" title=" SH-wave velocity"> SH-wave velocity</a> </p> <a href="https://publications.waset.org/abstracts/106511/evaluation-of-internal-friction-angle-in-overconsolidated-granular-soil-deposits-using-p-and-s-wave-seismic-velocities" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/106511.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">159</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">4579</span> Challenges in Experimental Testing of a Stiff, Overconsolidated Clay</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maria%20Konstadinou">Maria Konstadinou</a>, <a href="https://publications.waset.org/abstracts/search?q=Etienne%20Alderlieste"> Etienne Alderlieste</a>, <a href="https://publications.waset.org/abstracts/search?q=Anderson%20Peccin%20da%20Silva"> Anderson Peccin da Silva</a>, <a href="https://publications.waset.org/abstracts/search?q=Ben%20Arntz"> Ben Arntz</a>, <a href="https://publications.waset.org/abstracts/search?q=Leonard%20van%20der%20Bijl"> Leonard van der Bijl</a>, <a href="https://publications.waset.org/abstracts/search?q=Wouter%20Verschueren"> Wouter Verschueren</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The shear strength and compression properties of stiff Boom clay from Belgium at the depth of about 30 m has been investigated by means of cone penetration and laboratory testing. The latter consisted of index classification, constant rate of strain, direct, simple shear, and unconfined compression tests. The Boom clay samples exhibited strong swelling tendencies. The suction pressure was measured via different procedures and has been compared to the expected in-situ stress. The undrained shear strength and OCR profile determined from CPTs is not compatible with the experimental measurements, which gave significantly lower values. The observed response can be attributed to the presence of pre-existing discontinuities, as shown in microscale CT scans of the samples. The results of this study demonstrate that the microstructure of the clay prior to testing has an impact on the mechanical behaviour and can cause inconsistencies in the comparison of the laboratory test results with in-situ data. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=boom%20clay" title="boom clay">boom clay</a>, <a href="https://publications.waset.org/abstracts/search?q=laboratory%20testing" title=" laboratory testing"> laboratory testing</a>, <a href="https://publications.waset.org/abstracts/search?q=overconsolidation%20ratio" title=" overconsolidation ratio"> overconsolidation ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=stress-strain%20response" title=" stress-strain response"> stress-strain response</a>, <a href="https://publications.waset.org/abstracts/search?q=swelling" title=" swelling"> swelling</a>, <a href="https://publications.waset.org/abstracts/search?q=undrained%20shear%20strength" title=" undrained shear strength"> undrained shear strength</a> </p> <a href="https://publications.waset.org/abstracts/144267/challenges-in-experimental-testing-of-a-stiff-overconsolidated-clay" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/144267.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">4578</span> Application of Golden Ratio in Contemporary Textile Industry and Its Effect on Consumer Preferences</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rafia%20Asghar">Rafia Asghar</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdul%20Hafeez"> Abdul Hafeez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research aims to determine the influence of Fibonacci numbers and golden ratio through textile designs. This study was carried out by collecting a variety of designs from different textile industries. Top textile designers were also interviewed regarding golden ratio and its application on their designs and design execution process. This study revealed that most of the designs fulfilled the golden ratio and the designs that were according to golden ratio were more favorite to the consumers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=golden%20ratio" title="golden ratio">golden ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=Fibonacci%20numbers" title=" Fibonacci numbers"> Fibonacci numbers</a>, <a href="https://publications.waset.org/abstracts/search?q=textile%20design" title=" textile design"> textile design</a>, <a href="https://publications.waset.org/abstracts/search?q=designs" title=" designs"> designs</a> </p> <a href="https://publications.waset.org/abstracts/20347/application-of-golden-ratio-in-contemporary-textile-industry-and-its-effect-on-consumer-preferences" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20347.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">718</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">4577</span> Determining G-γ Degradation Curve in Cohesive Soils by Dilatometer and in situ Seismic Tests</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ivandic%20Kreso">Ivandic Kreso</a>, <a href="https://publications.waset.org/abstracts/search?q=Spiranec%20Miljenko"> Spiranec Miljenko</a>, <a href="https://publications.waset.org/abstracts/search?q=Kavur%20Boris"> Kavur Boris</a>, <a href="https://publications.waset.org/abstracts/search?q=Strelec%20Stjepan"> Strelec Stjepan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article discusses the possibility of using dilatometer tests (DMT) together with in situ seismic tests (MASW) in order to get the shape of G-g degradation curve in cohesive soils (clay, silty clay, silt, clayey silt and sandy silt). MASW test provides the small soil stiffness (G<sub>o</sub> from v<sub>s</sub>) at very small strains and DMT provides the stiffness of the soil at ‘work strains’ (M<sub>DMT</sub>). At different test locations, dilatometer shear stiffness of the soil has been determined by the theory of elasticity. Dilatometer shear stiffness has been compared with the theoretical G-g degradation curve in order to determine the typical range of shear deformation for different types of cohesive soil. The analysis also includes factors that influence the shape of the degradation curve (G-g) and dilatometer modulus (M<sub>DMT</sub>), such as the overconsolidation ratio (OCR), plasticity index (IP) and the vertical effective stress in the soil (s<sub>vo</sub>'). Parametric study in this article defines the range of shear strain g<sub>DMT</sub> and <em>G<sub>DMT</sub>/G<sub>o</sub></em> relation depending on the classification of a cohesive soil (clay, silty clay, clayey silt, silt and sandy silt), function of density (loose, medium dense and dense) and the stiffness of the soil (soft, medium hard and hard). The article illustrates the potential of using MASW and DMT to obtain G-g degradation curve in cohesive soils. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dilatometer%20testing" title="dilatometer testing">dilatometer testing</a>, <a href="https://publications.waset.org/abstracts/search?q=MASW%20testing" title=" MASW testing"> MASW testing</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20wave" title=" shear wave"> shear wave</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20stiffness" title=" soil stiffness"> soil stiffness</a>, <a href="https://publications.waset.org/abstracts/search?q=stiffness%20reduction" title=" stiffness reduction"> stiffness reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20strain" title=" shear strain"> shear strain</a> </p> <a href="https://publications.waset.org/abstracts/90287/determining-g-gh-degradation-curve-in-cohesive-soils-by-dilatometer-and-in-situ-seismic-tests" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90287.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">316</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">4576</span> The Influence of Feedgas Ratio on the Ethene Hydroformylation using Rh-Co Bimetallic Catalyst Supported by Reduced Graphene Oxide</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jianli%20Chang">Jianli Chang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yusheng%20Zhang"> Yusheng Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yali%20Yao"> Yali Yao</a>, <a href="https://publications.waset.org/abstracts/search?q=Diane%20Hildebrandt"> Diane Hildebrandt</a>, <a href="https://publications.waset.org/abstracts/search?q=Xinying%20Liu"> Xinying Liu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The influence of feed-gas ratio on the ethene hydroformylation over an Rh-Co bimetallic catalyst supported by reduced graphene oxide (RGO) has been investigated in a tubular fixed bed reactor. Argon was used as balance gas when the feed-gas ratio was changed, which can keep the partial pressure of the other two kinds of gas constant while the ratio of one component in feed-gas was changed. First, the effect of single-component gas ratio on the performance of ethene hydroformylation was studied one by one (H₂, C₂H₄ and CO). Then an optimized ratio was found to obtain a high selectivity to C₃ oxygenates. The results showed that: (1) 0.5%Rh-20%Co/RGO is a promising heterogeneous catalyst for ethene hydroformylation. (2) H₂ and CO have a more significant influence than C₂H₄ on selectivity to oxygenates. (3) A lower H₂ ratio and a higher CO ratio in feed-gas can lead to a higher selectivity to oxygenates. (4) The highest selectivity to oxygenates, 61.70%, was obtained at the feed-gas ratio CO: C₂H₄: H₂ = 4: 2: 1. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ethene%20hydroformylation" title="ethene hydroformylation">ethene hydroformylation</a>, <a href="https://publications.waset.org/abstracts/search?q=reduced%20graphene%20oxide" title=" reduced graphene oxide"> reduced graphene oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=rhodium%20cobalt%20bimetallic%20catalyst" title=" rhodium cobalt bimetallic catalyst"> rhodium cobalt bimetallic catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=the%20effect%20of%20feed-gas%20ratio" title=" the effect of feed-gas ratio"> the effect of feed-gas ratio</a> </p> <a href="https://publications.waset.org/abstracts/146368/the-influence-of-feedgas-ratio-on-the-ethene-hydroformylation-using-rh-co-bimetallic-catalyst-supported-by-reduced-graphene-oxide" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/146368.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">163</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">4575</span> The Simple Two-Step Polydimethylsiloxane (PDMS) Transferring Process for High Aspect Ratio Microstructures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shaoxi%20Wang">Shaoxi Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Pouya%20Rezai"> Pouya Rezai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> High aspect ratio is the necessary parts of complex microstructures. Some methods available to achieve high aspect ratio requires expensive materials or complex process; others is difficult to research simple high aspect ratio structures. The paper presents a simple and cheap two-step Polydimethylsioxane (PDMS) transferring process to get high aspect ratio single pillars, which only requires covering the PDMS mold with Brij@52 surface solution. The experimental results demonstrate the method efficiency and effective. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=high%20aspect%20ratio" title="high aspect ratio">high aspect ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=PDMS" title=" PDMS"> PDMS</a>, <a href="https://publications.waset.org/abstracts/search?q=Brij" title=" Brij"> Brij</a> </p> <a href="https://publications.waset.org/abstracts/42756/the-simple-two-step-polydimethylsiloxane-pdms-transferring-process-for-high-aspect-ratio-microstructures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42756.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">264</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">4574</span> The Road to Tunable Structures: Comparison of Experimentally Characterised and Numerical Modelled Auxetic Perforated Sheet Structures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arthur%20Thirion">Arthur Thirion</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Auxetic geometries allow the generation of a negative Poisson ratio (NPR) in conventional materials. This behaviour allows materials to have certain improved mechanical properties, including impact resistance and altered synclastic behaviour. This means these structures have significant potential when it comes to applications as chronic wound dressings. To this end, 6 different "perforated sheet" structure types were 3D printed. These structures all had variations of key geometrical features included cell length and angle. These were tested in compression and tension to assess their Poisson ratio. Both a positive and negative Poisson ratio was generated by the structures depending on the loading. The a/b ratio followed by θ has been shown to impact the Poisson ratio significantly. There is still a significant discrepancy between modelled and observed behaviour. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=auxetic%20materials" title="auxetic materials">auxetic materials</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20printing" title=" 3D printing"> 3D printing</a>, <a href="https://publications.waset.org/abstracts/search?q=negative%20Poisson%27s%20ratio" title=" negative Poisson's ratio"> negative Poisson's ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=tunable%20Poisson%27s%20ratio" title=" tunable Poisson's ratio"> tunable Poisson's ratio</a> </p> <a href="https://publications.waset.org/abstracts/144046/the-road-to-tunable-structures-comparison-of-experimentally-characterised-and-numerical-modelled-auxetic-perforated-sheet-structures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/144046.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">117</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">4573</span> Enhanced Methane Production from Waste Paper through Anaerobic Co-Digestion with Macroalgae</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cristina%20Rodriguez">Cristina Rodriguez</a>, <a href="https://publications.waset.org/abstracts/search?q=Abed%20Alaswad"> Abed Alaswad</a>, <a href="https://publications.waset.org/abstracts/search?q=Zaki%20El-Hassan"> Zaki El-Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdul%20G.%20Olabi"> Abdul G. Olabi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigates the effect on methane production from the waste paper when co-digested with macroalgal biomass as a source of nitrogen. Both feedstocks were previously mechanically pretreated in order to reduce their particle size. Methane potential assays were carried out at laboratory scale in batch mode for 28 days. The study was planned according to two factors: the feedstock to inoculum (F/I) ratio and the waste paper to macroalgae (WP/MA) ratio. The F/I ratios checked were 0.2, 0.3 and 0.4 and the WP/MA ratios were 0:100, 25:75, 50:50, 75:25 and 100:0. The highest methane yield (608 ml/g of volatile solids (VS)) was achieved at an F/I ratio of 0.2 and a WP/MA ratio of 50:50. The methane yield at a ratio WP/MA of 50:50 is higher than for single compound, while for ratios WP/MA of 25:75 and 75:25 the methane yield decreases compared to biomass mono-digestion. This behavior is observed for the three levels of F/I ratio being more noticeable at F/I ratio of 0.3. A synergistic effect was found for the WP/MA ratio of 50:50 and all F/I ratios and for WP/MA=50:50 and F/I=0.2. A maximum increase of methane yield of 49.58% was found for a co-digestion ratio of 50:50 and an F/I ratio of 0.4. It was concluded that methane production from waste paper improves significantly when co-digested with macroalgae biomass. The methane yields from co-digestion were also found higher that from macroalgae mono-digestion. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anaerobic%20co-digestion" title="anaerobic co-digestion">anaerobic co-digestion</a>, <a href="https://publications.waset.org/abstracts/search?q=biogas" title=" biogas"> biogas</a>, <a href="https://publications.waset.org/abstracts/search?q=macroalgae" title=" macroalgae"> macroalgae</a>, <a href="https://publications.waset.org/abstracts/search?q=waste%20paper" title=" waste paper"> waste paper</a> </p> <a href="https://publications.waset.org/abstracts/64720/enhanced-methane-production-from-waste-paper-through-anaerobic-co-digestion-with-macroalgae" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/64720.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">367</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">4572</span> Effect of Si/Al Ratio on SSZ-13 Crystallization and Its Methanol-To-Olefins Catalytic Properties</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zhiqiang%20Xu">Zhiqiang Xu</a>, <a href="https://publications.waset.org/abstracts/search?q=Hongfang%20Ma"> Hongfang Ma</a>, <a href="https://publications.waset.org/abstracts/search?q=Haitao%20Zhang"> Haitao Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Weixin%20Qian"> Weixin Qian</a>, <a href="https://publications.waset.org/abstracts/search?q=Weiyong%20Ying"> Weiyong Ying</a> </p> <p class="card-text"><strong>Abstract:</strong></p> SSZ-13 materials with different Si/Al ratio were prepared by varying the composition of aluminosilicate precursor solutions upon hydrothermal treatment at 150 °C. The Si/Al ratio of the initial system was systematically changed from 12.5 to infinity in order to study the limits of Al composition in precursor solutions for constructing CHA structure. The intermediates and final products were investigated by complementary techniques such as XRD, HRTEM, FESEM, and chemical analysis. NH<sub>3</sub>-TPD was used to study the Brønsted acidity of SSZ-13 samples with different Si/Al ratios. The effect of the Si/Al ratio on the precursor species, ultimate crystal size, morphology and yield was investigated. The results revealed that Al species determine the nucleation rate and the number of nuclei, which is tied to the morphology and yield of SSZ-13. The size of SSZ-13 increased and the yield decreased as the Si/Al ratio was improved. Varying Si/Al ratio of the initial system is a facile, commercially viable method of tailoring SSZ-13 crystal size and morphology. Furthermore, SSZ-13 materials with different Si/Al ratio were tested as catalysts for the methanol to olefins (MTO) reaction at 350 °C. SSZ-13 with the Si/Al ratio of 35 shows the best MTO catalytic performance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=crystallization" title="crystallization">crystallization</a>, <a href="https://publications.waset.org/abstracts/search?q=MTO" title=" MTO"> MTO</a>, <a href="https://publications.waset.org/abstracts/search?q=Si%2FAl%20ratio" title=" Si/Al ratio"> Si/Al ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=SSZ-13" title=" SSZ-13"> SSZ-13</a> </p> <a href="https://publications.waset.org/abstracts/93128/effect-of-sial-ratio-on-ssz-13-crystallization-and-its-methanol-to-olefins-catalytic-properties" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93128.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">294</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">4571</span> The Determination of Sodium/Potassium Ion Ratio in Selected Edible Leafy Vegetables in North-Eastern Nigeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Raymond%20D.%20Uzoh">Raymond D. Uzoh</a>, <a href="https://publications.waset.org/abstracts/search?q=Philip%20K.%20Shallsuku"> Philip K. Shallsuku</a>, <a href="https://publications.waset.org/abstracts/search?q=Christopher%20S.%20Vaachia"> Christopher S. Vaachia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Selected edible leafy vegetables from North-eastern Nigeria were analysed for their sodium and potassium content in mg/100 g and the ratio Na+/K+ worked out. From experimental results, Venonia amydalina (bitter leaf) contained 150 mg (0.15 g) of sodium and 20500 mg (20.5 g) potassium with a ratio of 0.007, Brassica oleracea var capitata (cabbage) contained 300 mg (0.3 g) of sodium and 19000 mg (19 g) of potassium with a ration of 0.012. Others are Telfairia occidentalis (fluted pumpkin) with 400 mg (0.45 g) of sodium and 19500 mg (19.5 g) of potassium with a ratio of 0.020; Hibiscus sabdriffa (sorrel) has 200 mg (0.2 g) of sodium and 600 mg (0.6 g) of potassium with a ratio of 0.300; and Amarantus caudatus (spinach) contained 450 mg (0.45 g) of sodium and 23000 mg (23 g) of potassium with a ratio of 0.020. The presence of sodium and potassium in foods has become increasingly important as recent studies and dietary information gathered in this research has shown that sodium intake is not the sole consideration in elevated blood pressure but its considered as a ratio Na+/K+ fixed at 0.6. This ratio has been found to be a more important factor, suggesting that our diet should contain 67 % more potassium than sodium. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vegetables" title="vegetables">vegetables</a>, <a href="https://publications.waset.org/abstracts/search?q=sodium" title=" sodium"> sodium</a>, <a href="https://publications.waset.org/abstracts/search?q=potassium" title=" potassium"> potassium</a>, <a href="https://publications.waset.org/abstracts/search?q=blood%20pressure" title=" blood pressure"> blood pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=diet" title=" diet"> diet</a>, <a href="https://publications.waset.org/abstracts/search?q=foods" title=" foods "> foods </a> </p> <a href="https://publications.waset.org/abstracts/11091/the-determination-of-sodiumpotassium-ion-ratio-in-selected-edible-leafy-vegetables-in-north-eastern-nigeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11091.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">479</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">4570</span> Comparative Study of Arch Bridges with Varying Rise to Span Ratio</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tauhidur%20Rahman">Tauhidur Rahman</a>, <a href="https://publications.waset.org/abstracts/search?q=Arnab%20Kumar%20Sinha"> Arnab Kumar Sinha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a comparative study of Arch bridges based on their varying rise to span ratio. The comparison is done between different steel Arch bridges which have variable span length and rise to span ratio keeping the same support condition. The aim of our present study is to select the optimum value of rise to span ratio of Arch bridge as the cost of the Arch bridge increases with the increasing of the rise. In order to fulfill the objective, several rise to span ratio have been considered for same span of Arch bridge and various structural parameters such as Bending moment, shear force etc have been calculated for different model. A comparative study has been done for several Arch bridges finally to select the optimum rise to span ratio of the Arch bridges. In the present study, Finite Element model for medium to long span, with different rise to span ratio have been modeled and are analyzed with the help of a Computational Software named MIDAS Civil to evaluate the results such as Bending moments, Shear force, displacements, Stresses, influence line diagrams, critical loads. In the present study, 60 models of Arch bridges for 80 to 120 m span with different rise to span ratio has been thoroughly investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=arch%20bridge" title="arch bridge">arch bridge</a>, <a href="https://publications.waset.org/abstracts/search?q=analysis" title=" analysis"> analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=comparative%20study" title=" comparative study"> comparative study</a>, <a href="https://publications.waset.org/abstracts/search?q=rise%20to%20span%20ratio" title=" rise to span ratio"> rise to span ratio</a> </p> <a href="https://publications.waset.org/abstracts/26463/comparative-study-of-arch-bridges-with-varying-rise-to-span-ratio" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26463.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">531</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">4569</span> The Cut-Off Value of TG/HDL Ratio of High Pericardial Adipose Tissue</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nam-Seok%20Joo">Nam-Seok Joo</a>, <a href="https://publications.waset.org/abstracts/search?q=Da-Eun%20Jung"> Da-Eun Jung</a>, <a href="https://publications.waset.org/abstracts/search?q=Beom-Hee%20Choi"> Beom-Hee Choi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background and Objectives: Recently, the triglyceride/high-density lipoprotine cholesterol (TG/HDL) ratio and pericardial adipose tissue (PAT) has gained attention as an indicator related to metabolic syndrome (MS). To date, there has been no research on the relationship between TG/HDL and PAT, we aimed to investigate the association between the TG/HDL and PAT. Methods: In this cross-sectional study, we investigated 627 patients who underwent coronary multidetector computed tomography and metabolic parameters. We divided subjects into two groups according to the cut-off PAT volume associated with MS, which is 142.2 cm³, and we compared metabolic parameters between those groups. We divided the TG/HDL ratio into tertiles according to Log(TG/HDL) and compared PAT-related parameters by analysis of variance. Finally, we applied logistic regression analysis to obtain the odds ratio of high PAT (PAT volume≥142.2 cm³) in each tertile, and we performed receiver operating characteristic (ROC) analysis to get the cut-off of TG/HDL ratio according to high PAT. Results: The mean TG/ HDL ratio of the high PAT volume group was 3.6, and TG/ HDL ratio had a strong positive correlation with various metabolic parameters. In addition, in the Log (TG/HDL) tertile groups, the higher tertile had more metabolic derangements, including PAT, and showed higher odds ratios of having high PAT (OR=4.10 in the second tertile group and OR=5.06 in their third tertile group, respectively) after age, sex, smoking adjustments. TG/HDL ratio according to the having increased PAT by ROC curve showed 1.918 (p < 0.001). Conclusion: TG/HDL ratio and high PAT volume have a significant positive correlation, and higher TG/HDL ratio showed high PAT. The cut-off value of the TG/HDL ratio was 1.918 to have a high PAT. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=triglyceride" title="triglyceride">triglyceride</a>, <a href="https://publications.waset.org/abstracts/search?q=high-density%20lipoprotein" title=" high-density lipoprotein"> high-density lipoprotein</a>, <a href="https://publications.waset.org/abstracts/search?q=pericardial%20adipose%20tissue" title=" pericardial adipose tissue"> pericardial adipose tissue</a>, <a href="https://publications.waset.org/abstracts/search?q=cut-off%20value" title=" cut-off value"> cut-off value</a> </p> <a href="https://publications.waset.org/abstracts/192981/the-cut-off-value-of-tghdl-ratio-of-high-pericardial-adipose-tissue" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192981.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">16</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">4568</span> Convergence with IFRS: Evidence from Financial Statements</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20S.%20Turan">M. S. Turan</a>, <a href="https://publications.waset.org/abstracts/search?q=Dimple"> Dimple</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Due to implementation of IFRS by several developed and developing countries, India has no option other than to converge their accounting standards with IFRS. There are over 10,000 listed companies required to implement IFRS in India. IFRS based financial information presented by a company is different from the same information provided by Indian GAAPs. In this study, we have brought out and analyzed the effect of IFRS reporting on the financial statements of selected companies. The results reveal that convergence with IFRS brought prominent positive variations in the values of quick ratio, debt/equity ratio, proprietary ratio and net profit ratio, while negative variation is brought in the values of current ratio, debt to total assets ratio, operating profit ratio, return on capital employed and return on shareholders’ equity ratios. It also presents significant changes in the values of items of balance sheet, profit and loss account and cash flow statement. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=IFRS" title="IFRS">IFRS</a>, <a href="https://publications.waset.org/abstracts/search?q=reporting%20standards" title=" reporting standards"> reporting standards</a>, <a href="https://publications.waset.org/abstracts/search?q=convergence%20process" title=" convergence process"> convergence process</a>, <a href="https://publications.waset.org/abstracts/search?q=results" title=" results "> results </a> </p> <a href="https://publications.waset.org/abstracts/14903/convergence-with-ifrs-evidence-from-financial-statements" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14903.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">334</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4567</span> Optimization of Biodiesel Production from Sunflower Oil Using Central Composite Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pascal%20Mwenge">Pascal Mwenge</a>, <a href="https://publications.waset.org/abstracts/search?q=Jefrey%20Pilusa"> Jefrey Pilusa</a>, <a href="https://publications.waset.org/abstracts/search?q=Tumisang%20Seodigeng"> Tumisang Seodigeng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The current study investigated the effect of catalyst ratio and methanol to oil ratio on biodiesel production by using central composite design. Biodiesel was produced by transesterification using sodium hydroxide as a homogeneous catalyst, a laboratory scale reactor consisting of flat bottom flask mounts with a reflux condenser and a heating plate was used to produce biodiesel. Key parameters, including, time, temperature and mixing rate were kept constant at 60 minutes, 60 <sup>o</sup>C and 600 RPM, respectively. From the results obtained, it was observed that the biodiesel yield depends on catalyst ratio and methanol to oil ratio. The highest yield of 50.65% was obtained at catalyst ratio of 0.5 wt.% and methanol to oil mole ratio 10.5. The analysis of variances of biodiesel yield showed the R Squared value of 0.8387. A quadratic mathematical model was developed to predict the biodiesel yield in the specified parameters ranges. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ANOVA" title="ANOVA">ANOVA</a>, <a href="https://publications.waset.org/abstracts/search?q=biodiesel" title=" biodiesel"> biodiesel</a>, <a href="https://publications.waset.org/abstracts/search?q=catalyst" title=" catalyst"> catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=CCD" title=" CCD"> CCD</a>, <a href="https://publications.waset.org/abstracts/search?q=transesterification" title=" transesterification"> transesterification</a> </p> <a href="https://publications.waset.org/abstracts/92550/optimization-of-biodiesel-production-from-sunflower-oil-using-central-composite-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/92550.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">206</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">4566</span> Microwave Plasma Dry Reforming of Methane at High CO2/CH4 Feed Ratio</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nabil%20Majd%20Alawi">Nabil Majd Alawi</a>, <a href="https://publications.waset.org/abstracts/search?q=Gia%20Hung%20Pham"> Gia Hung Pham</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Barifcani"> Ahmed Barifcani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dry reforming of methane that converts two greenhouses gases (CH<sub>4</sub> and CO<sub>2</sub>) to synthesis gas (a mixture of H<sub>2</sub> and CO) was studied in a commercial bench scale microwave (MW) plasma reactor system at atmospheric pressure. The CO<sub>2</sub>, CH<sub>4</sub> and N<sub>2</sub> conversions; H<sub>2</sub>, CO selectivities and yields, and syngas ratio (H<sub>2</sub>/CO) were investigated in a wide range of total feed flow rate (0.45 – 2.1 L/min), MW power (700 – 1200 watt) and CO<sub>2</sub>/CH<sub>4</sub> molar ratio (2 – 5). At the feed flow rates of CH<sub>4</sub>, CO<sub>2</sub> and N<sub>2</sub> of 0.2, 0.4 and 1.5 L/min respectively, and the MWs input power of 700 W, the highest conversions of CH<sub>4</sub> and CO<sub>2</sub>, selectivity and yield of H<sub>2</sub>, CO and H<sub>2</sub>/CO ratio of 79.35%, 44.82%, 50.12, 58.42, 39.77%, 32.89%, and 0.86, respectively, were achieved. The results of this work show that the product ratio increases slightly with the increasing total feed flow rate, but it decreases significantly with the increasing MW power and feeds CO<sub>2</sub>/CH<sub>4</sub> ratio. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dry%20reforming%20of%20methane" title="dry reforming of methane">dry reforming of methane</a>, <a href="https://publications.waset.org/abstracts/search?q=microwave%20discharge" title=" microwave discharge"> microwave discharge</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20technology" title=" plasma technology"> plasma technology</a>, <a href="https://publications.waset.org/abstracts/search?q=synthesis%20gas%20production" title=" synthesis gas production"> synthesis gas production</a> </p> <a href="https://publications.waset.org/abstracts/95887/microwave-plasma-dry-reforming-of-methane-at-high-co2ch4-feed-ratio" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/95887.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">274</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">4565</span> Bowen Ratio in Western São Paulo State, Brazil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elaine%20Cristina%20Barboza">Elaine Cristina Barboza</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonio%20Jaschke%20Machado"> Antonio Jaschke Machado</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper discusses micrometeorological aspects of the urban climate in three cities in Western São Paulo State: Presidente Prudente, Assis, and Iepê. Particular attention is paid to the method used to estimate the components of the energy balance at the surface. Estimates of convective fluxes showed that the Bowen ratio was an indicator of the local climate and that its magnitude varied between 0.3 and 0.7. Maximum values for the Bowen ratio occurred earlier in Iepê (11:00 am) than in Presidente Prudente (4:00 pm). The results indicate that the Bowen ratio is modulated by the radiation balance at the surface and by different clusters of vegetation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bowen%20ratio" title="Bowen ratio">Bowen ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=medium-sized%20cities" title=" medium-sized cities"> medium-sized cities</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20energy%20balance" title=" surface energy balance"> surface energy balance</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20climate" title=" urban climate"> urban climate</a> </p> <a href="https://publications.waset.org/abstracts/29606/bowen-ratio-in-western-sao-paulo-state-brazil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29606.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">602</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">4564</span> Effects of Hydraulic Loading Rates and Porous Matrix in Constructed Wetlands for Wastewater Treatment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Li-Jun%20Ren">Li-Jun Ren</a>, <a href="https://publications.waset.org/abstracts/search?q=Wei%20Pan"> Wei Pan</a>, <a href="https://publications.waset.org/abstracts/search?q=Li-Li%20Xu"> Li-Li Xu</a>, <a href="https://publications.waset.org/abstracts/search?q=Shu-Qing%20An"> Shu-Qing An</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study evaluated whether different matrix composition volume ratio can improve water quality in the experiment. The mechanism and adsorption capability of wetland matrixes (oyster shell, coarse slag, and volcanic rock) and their different volume ratio in group configuration during pollutants removal processes were tested. When conditions unchanged, the residence time affects the reaction effect. The average removal efficiencies of four kinds of matrix volume ratio on the TN were 62.76%, 61.54%, 64.13%, and 55.89%, respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20residence%20time" title="hydraulic residence time">hydraulic residence time</a>, <a href="https://publications.waset.org/abstracts/search?q=matrix%20composition" title=" matrix composition"> matrix composition</a>, <a href="https://publications.waset.org/abstracts/search?q=removal%20efficiency" title=" removal efficiency"> removal efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=volume%20ratio" title=" volume ratio"> volume ratio</a> </p> <a href="https://publications.waset.org/abstracts/30418/effects-of-hydraulic-loading-rates-and-porous-matrix-in-constructed-wetlands-for-wastewater-treatment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30418.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">329</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">4563</span> Optimization of Biodiesel Production from Sunflower Oil Using Central Composite Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pascal%20Mwenge">Pascal Mwenge</a>, <a href="https://publications.waset.org/abstracts/search?q=Jefrey%20Pilusa"> Jefrey Pilusa</a>, <a href="https://publications.waset.org/abstracts/search?q=Tumisang%20Seodigeng"> Tumisang Seodigeng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The current study investigated the effect of catalyst ratio and methanol to oil ratio on biodiesel production by using central composite design. Biodiesel was produced by transesterification using sodium hydroxide as a homogeneous catalyst, a laboratory scale reactor consisting of flat bottom flask mounts with a reflux condenser, and a heating plate was used to produce biodiesel. Key parameters, including time, temperature, and mixing rate was kept constant at 60 minutes, 60 <sup>o</sup>C and 600 RPM, respectively. From the results obtained, it was observed that the biodiesel yield depends on catalyst ratio and methanol to oil ratio. The highest yield of 50.65% was obtained at catalyst ratio of 0.5 wt.% and methanol to oil mole ratio 10.5. The analysis of variances of biodiesel yield showed the R Squared value of 0.8387. A quadratic mathematical model was developed to predict the biodiesel yield in the specified parameters ranges. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ANOVA" title="ANOVA">ANOVA</a>, <a href="https://publications.waset.org/abstracts/search?q=biodiesel" title=" biodiesel"> biodiesel</a>, <a href="https://publications.waset.org/abstracts/search?q=catalyst" title=" catalyst"> catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=transesterification" title=" transesterification"> transesterification</a>, <a href="https://publications.waset.org/abstracts/search?q=central%20composite%20design" title=" central composite design"> central composite design</a> </p> <a href="https://publications.waset.org/abstracts/98851/optimization-of-biodiesel-production-from-sunflower-oil-using-central-composite-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98851.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">152</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">4562</span> Optimization of Sequential Thermophilic Bio-Hydrogen/Methane Production from Mono-Ethylene Glycol via Anaerobic Digestion: Impact of Inoculum to Substrate Ratio and N/P Ratio</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Elreedy">Ahmed Elreedy</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Tawfik"> Ahmed Tawfik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This investigation aims to assess the effect of inoculum to substrate ratio (ISR) and nitrogen to phosphorous balance on simultaneous biohydrogen and methane production from anaerobic decomposition of mono-ethylene glycol (MEG). Different ISRs were applied in the range between 2.65 and 13.23 gVSS/gCOD, whereas the tested N/P ratios were changed from 4.6 to 8.5; both under thermophilic conditions (55°C). The maximum obtained methane and hydrogen yields (MY and HY) of 151.86±10.8 and 22.27±1.1 mL/gCODinitial were recorded at ISRs of 5.29 and 3.78 gVSS/gCOD, respectively. Unlikely, the ammonification process, in terms of net ammonia produced, was found to be ISR and COD/N ratio dependent, reaching its peak value of 515.5±31.05 mgNH4-N/L at ISR and COD/N ratio of 13.23 gVSS/gCOD and 11.56. The optimum HY was enhanced by more than 1.45-fold with declining N/P ratio from 8.5 to 4.6; whereas, the MY was improved (1.6-fold), while increasing N/P ratio from 4.6 to 5.5 with no significant impact at N/P ratio of 8.5. The results obtained revealed that the methane production was strongly influenced by initial ammonia, compared to initial phosphate. Likewise, the generation of ammonia was markedly deteriorated from 535.25±41.5 to 238.33±17.6 mgNH4-N/L with increasing N/P ratio from 4.6 to 8.5. The kinetic study using Modified Gompertz equation was successfully fitted to the experimental outputs (R2 > 0.9761). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mono-ethylene%20glycol" title="mono-ethylene glycol">mono-ethylene glycol</a>, <a href="https://publications.waset.org/abstracts/search?q=biohydrogen%20and%20methane" title=" biohydrogen and methane"> biohydrogen and methane</a>, <a href="https://publications.waset.org/abstracts/search?q=inoculum%20to%20substrate%20ratio" title=" inoculum to substrate ratio"> inoculum to substrate ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=nitrogen%20to%20phosphorous%20balance" title=" nitrogen to phosphorous balance"> nitrogen to phosphorous balance</a>, <a href="https://publications.waset.org/abstracts/search?q=ammonification" title=" ammonification"> ammonification</a> </p> <a href="https://publications.waset.org/abstracts/54353/optimization-of-sequential-thermophilic-bio-hydrogenmethane-production-from-mono-ethylene-glycol-via-anaerobic-digestion-impact-of-inoculum-to-substrate-ratio-and-np-ratio" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54353.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">382</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">4561</span> Price to Earnings Growth (PEG) Predicting Future Returns Better than the Price to Earnings (PE) Ratio</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lindrianasari%20Stefanie">Lindrianasari Stefanie</a>, <a href="https://publications.waset.org/abstracts/search?q=Aminah%20Khairudin"> Aminah Khairudin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study aims to provide empirical evidence regarding the ability of Price to Earnings Ratio and PEG Ratio in predicting future stock returns issuers. The samples used in this study are stocks that go into LQ45. The main contribution is to assign empirical evidence if the PEG Ratio can provide optimum return compared to Price to Earnings Ratio. This study used a sample of the entire company into the group LQ45 with the period of observation. The data used is limited to the financial statements of a company incorporated in LQ45 period July 2013-July 2014, using the financial statements and the position of the company's closing stock price at the end of 2010 as a reference benchmark for the growth of the company's stock price compared to the closing price of 2013. This study found that the method of PEG Ratio can outperform the method of PE ratio in predicting future returns on the stock portfolio of LQ45. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=price%20to%20earnings%20growth" title="price to earnings growth">price to earnings growth</a>, <a href="https://publications.waset.org/abstracts/search?q=price%20to%20earnings%20ratio" title=" price to earnings ratio"> price to earnings ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=future%20returns" title=" future returns"> future returns</a>, <a href="https://publications.waset.org/abstracts/search?q=stock%20price" title=" stock price"> stock price</a> </p> <a href="https://publications.waset.org/abstracts/16670/price-to-earnings-growth-peg-predicting-future-returns-better-than-the-price-to-earnings-pe-ratio" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16670.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">412</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">4560</span> The Determinants of Financing to Deposit Ratio of Islamic Bank in Malaysia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Achsania%20Hendratmi">Achsania Hendratmi</a>, <a href="https://publications.waset.org/abstracts/search?q=Puji%20Sucia%20Sukmaningrum"> Puji Sucia Sukmaningrum</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatin%20Fadhilah%20Hasib"> Fatin Fadhilah Hasib</a>, <a href="https://publications.waset.org/abstracts/search?q=Nisful%20Laila"> Nisful Laila</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The research aimed to know the influence of Capital Adequacy Ratio (CAR), Return on Assets (ROA) and Size of the Financing to Deposit Ratio (FDR) Islamic Banks in Malaysia by using eleven Islamic Banks in Indonesia and fifteen Islamic Banks in Malaysia in the period 2012 to 2016 as samples. The research used a quantitative approach method, and the analysis technique used multiple linear regression. Based on the result of t-test (partial), CAR, ROA and size significantly affect of FDR. While the results of f-test (simultaneous) showed that CAR, ROA and Size significant effect on FDR. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=capital%20adequacy%20ratio" title="capital adequacy ratio">capital adequacy ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=financing%20to%20deposit%20ratio" title=" financing to deposit ratio"> financing to deposit ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=return%20on%20assets" title=" return on assets"> return on assets</a>, <a href="https://publications.waset.org/abstracts/search?q=size" title=" size"> size</a> </p> <a href="https://publications.waset.org/abstracts/72945/the-determinants-of-financing-to-deposit-ratio-of-islamic-bank-in-malaysia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/72945.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">339</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">4559</span> Study Concerning the Energy-to-Mass Ratio in Pneumatic Muscles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tudor%20Deaconescu">Tudor Deaconescu</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrea%20Deaconescu"> Andrea Deaconescu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The utilization of pneumatic muscles in the actuation of industrial systems is still in its early stages, hence studies on the constructive solutions which include an assessment of their functional performance with a focus on one of the most important characteristics-energy efficiency are required. A quality indicator that adequately reflects the energy efficiency of an actuator is the energy-to-mass ratio. This ratio is computed in the paper for various types and sizes of pneumatic muscles manufactured by Festo, and is subsequently compared to the similar ratios determined for two categories of pneumatic cylinders. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pneumatic%20cylinders" title="pneumatic cylinders">pneumatic cylinders</a>, <a href="https://publications.waset.org/abstracts/search?q=pneumatic%20muscles" title=" pneumatic muscles"> pneumatic muscles</a>, <a href="https://publications.waset.org/abstracts/search?q=energy-to-mass%20ratio" title=" energy-to-mass ratio"> energy-to-mass ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=muscle%20stroke" title=" muscle stroke"> muscle stroke</a> </p> <a href="https://publications.waset.org/abstracts/49121/study-concerning-the-energy-to-mass-ratio-in-pneumatic-muscles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49121.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">346</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">4558</span> Spatial Pattern of Child Sex Ratio in Haryana 1991-2011</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sunil%20Kumar">Sunil Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Kavita%20Saini"> Kavita Saini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Haryana emerged as a state after the separation from Punjab since November, 1966. It had only 7 districts at that time but subsequently their number increased and presents their 21 districts in the state. Age and sex composition occupies very important positions in any discussion on characteristics of a population. Changes in sex ratio largely reflect the underlying socio-economic and cultural patterns of a society in different ways. Child sex ratio in Haryana is continuously decreasing and according to the census child sex ratio found lowest position in the state. Therefore, the aims of this study to examine the spatial- temporal pattern of Child sex ratio during the period 1991-2011 and identify the ‘epicenter’ or core areas of deficit of females in Haryana using tehsil level data during the period 2001-2011. This study is primarily based on the secondary sources and data were collected from the ‘Census of India’ and ‘Statistical Department’ of Haryana. The standard deviation method has been used to see the average value of child sex ratio in the study. The maximum child sex ratio declined is noticed in the district of Mahendergarh, Jhajjar, Rewari and Sonipat. However, the west and south-western part of the state marked with consistently better child sex ratio throughout the period. This is vast contiguous belt running in the north-west to south-east direction from Punjab border to NCT of Delhi and reported a very low child sex ratio. Tehsils which have reported lower child sex ratio than the state average has been called ‘Core Problem Area’ or ‘epicenter’. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=child%20sex%20ratio" title="child sex ratio">child sex ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=core%20areas" title=" core areas"> core areas</a>, <a href="https://publications.waset.org/abstracts/search?q=epicenter" title=" epicenter"> epicenter</a>, <a href="https://publications.waset.org/abstracts/search?q=Haryana" title=" Haryana"> Haryana</a> </p> <a href="https://publications.waset.org/abstracts/21527/spatial-pattern-of-child-sex-ratio-in-haryana-1991-2011" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21527.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">410</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">4557</span> Third Super-Harmonic Resonance in Vortex-Induced Vibration of a Pipeline Close to the Seabed</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yiming%20Jin">Yiming Jin</a>, <a href="https://publications.waset.org/abstracts/search?q=Ping%20Dong"> Ping Dong</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The third super-harmonic resonance of a pipeline close to the seabed is investigated in this paper. To analyse the vortex-induced vibration (VIV) of the pipeline close to the seabed, the classic Van der Pol equation is extended with a nonlinear item. Then, on the base of the multi-scale method, the frequency-response curves of the pipeline with regard to the third super-harmonic resonance are studied with a series of parameters, such as the mass ratio, frequency, damp ratio and gap ratio. On the whole, the numerical results show that the characters of third super-harmonic resonance are quite from that of primary resonance, though with the same trend that the larger is the mass ratio, the smaller impact the gap ratio has on the frequency-response curves of the third super-harmonic resonance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=the%20third%20super-harmonic%20resonance" title="the third super-harmonic resonance">the third super-harmonic resonance</a>, <a href="https://publications.waset.org/abstracts/search?q=gap%20ratio" title=" gap ratio"> gap ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=vortex-induced%20vibration" title=" vortex-induced vibration"> vortex-induced vibration</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-scale%20method" title=" multi-scale method"> multi-scale method</a> </p> <a href="https://publications.waset.org/abstracts/42056/third-super-harmonic-resonance-in-vortex-induced-vibration-of-a-pipeline-close-to-the-seabed" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42056.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">431</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">4556</span> Optimization of Fin Type and Fin per Inch on Heat Transfer and Pressure Drop of an Air Cooler</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Falavand%20Jozaei">A. Falavand Jozaei</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Ghafouri"> A. Ghafouri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Operation enhancement in an air cooler (heat exchanger) depends on the rate of heat transfer, and pressure drop. In this paper, for a given heat duty, study of the effects of FPI (fin per inch) and fin type (circular and hexagonal fins) on two parameters mentioned above is considered in an air cooler in Iran, Arvand petrochemical. A program in EES (Engineering Equations Solver) software moreover, Aspen B-JAC and HTFS+ software are used for this purpose to solve governing equations. At first the simulated results obtained from this program is compared to the experimental data for two cases of FPI. The effects of FPI from 3 to 15 over heat transfer (Q) to pressure drop ratio (Q/Δp ratio). This ratio is one of the main parameters in design, rating, and simulation heat exchangers. The results show that heat transfer (Q) and pressure drop increase with increasing FPI (fin per inch) steadily, and the Q/Δp ratio increases to FPI = 12 (for circular fins about 47% and for hexagonal fins about 69%) and then decreased gradually to FPI = 15 (for circular fins about 5% and for hexagonal fins about 8%), and Q/Δp ratio is maximum at FPI = 12. The FPI value selection between 8 and 12 obtained as a result to optimum heat transfer to pressure drop ratio. Also by contrast, between circular and hexagonal fins results, the Q/Δp ratio of hexagonal fins more than Q/Δp ratio of circular fins for FPI between 8 and 12 (optimum FPI). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=air%20cooler" title="air cooler">air cooler</a>, <a href="https://publications.waset.org/abstracts/search?q=circular%20and%20hexagonal%20fins" title=" circular and hexagonal fins"> circular and hexagonal fins</a>, <a href="https://publications.waset.org/abstracts/search?q=fin%20per%20inch" title=" fin per inch"> fin per inch</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer%20and%20pressure%20drop" title=" heat transfer and pressure drop"> heat transfer and pressure drop</a> </p> <a href="https://publications.waset.org/abstracts/32875/optimization-of-fin-type-and-fin-per-inch-on-heat-transfer-and-pressure-drop-of-an-air-cooler" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32875.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">454</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4555</span> Strength of Fine Concrete Used in Textile Reinforced Concrete by Changing Water-Binder Ratio</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Taekyun%20Kim">Taekyun Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Jongho%20Park"> Jongho Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Jinwoong%20Choi"> Jinwoong Choi</a>, <a href="https://publications.waset.org/abstracts/search?q=Sun-Kyu%20Park"> Sun-Kyu Park</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recently, the abnormal climate phenomenon has enlarged due to the global warming. As a result, temperature variation is increasing and the term is being prolonged, frequency of high and low temperature is increasing by heat wave and severe cold. Especially for reinforced concrete structure, the corrosion of reinforcement has occurred by concrete crack due to temperature change and the durability of the structure that has decreased by concrete crack. Accordingly, the textile reinforced concrete (TRC) which does not corrode due to using textile is getting the interest and the investigation of TRC is proceeding. The study of TRC structure behavior has proceeded, but the characteristic study of the concrete used in TRC is insufficient. Therefore, characteristic of the concrete by changing mixing ratio is studied in this paper. As a result, mixing ratio with different water-binder ratio has influenced to the strength of concrete. Also, as the water-binder ratio has decreased, strength of concrete has increased. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=concrete" title="concrete">concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=mixing%20ratio" title=" mixing ratio"> mixing ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=textile" title=" textile"> textile</a>, <a href="https://publications.waset.org/abstracts/search?q=TRC" title=" TRC"> TRC</a> </p> <a href="https://publications.waset.org/abstracts/46094/strength-of-fine-concrete-used-in-textile-reinforced-concrete-by-changing-water-binder-ratio" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46094.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">405</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">4554</span> Primary Resonance in Vortex-Induced Vibration of a Pipeline Close to a Plane Boundary</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yiming%20Jin">Yiming Jin</a>, <a href="https://publications.waset.org/abstracts/search?q=Ping%20Dong"> Ping Dong</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The primary resonance of a pipeline close to a plane boundary is investigated in this paper. Based on classic Van der Pol equation and added a nonlinear item, a new wake oscillator model is proposed to predict the vortex-induced vibration (VIV) of a circular cylinder close to a plane boundary. Then, with the multi-scale method, the approximate solution for the case of the primary resonance is obtained. Besides, to study the characteristic of the primary resonance, the effects of the mass ration, frequency, damp ratio and gap ratio on the frequency-response curves of the pipeline are analysed. On the whole, the trend of the numerical results match up with that of the experimental data well and the mass ration, frequency, damp ratio and gap ratio play an important role in the vortex-induced vibration (VIV) of a circular cylinder close to a plane boundary, especially, the smaller is the mass ratio, the larger impact the gap ratio has on the frequency-response curves of the primary resonance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=primary%20resonance" title="primary resonance">primary resonance</a>, <a href="https://publications.waset.org/abstracts/search?q=gap%20ratio" title=" gap ratio"> gap ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=vortex-induced%20vibration" title=" vortex-induced vibration"> vortex-induced vibration</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-scale%20method" title=" multi-scale method"> multi-scale method</a> </p> <a href="https://publications.waset.org/abstracts/42055/primary-resonance-in-vortex-induced-vibration-of-a-pipeline-close-to-a-plane-boundary" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42055.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">372</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">4553</span> Ratio Type Estimators for the Estimation of Population Coefficient of Variation under Two-Stage Sampling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Jabbar">Muhammad Jabbar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper we propose two ratio and ratio type exponential estimator for the estimation of population coefficient of variation using the auxiliary information under two-stage sampling. The properties of these estimators are derived up to first order of approximation. The efficiency conditions under which suggested estimator are more efficient, are obtained. Numerical and simulated studies are conducted to support the superiority of the estimators. Theoretically and numerically, we have found that our proposed estimator is always more efficient as compared to its competitor estimator. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=two-stage%20sampling" title="two-stage sampling">two-stage sampling</a>, <a href="https://publications.waset.org/abstracts/search?q=coefficient%20of%20variation" title=" coefficient of variation"> coefficient of variation</a>, <a href="https://publications.waset.org/abstracts/search?q=ratio%20type%20exponential%20estimator" title=" ratio type exponential estimator"> ratio type exponential estimator</a> </p> <a href="https://publications.waset.org/abstracts/21936/ratio-type-estimators-for-the-estimation-of-population-coefficient-of-variation-under-two-stage-sampling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21936.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">4552</span> Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20H.%20Othman">N. H. Othman</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Udin"> N. Udin</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Ishak"> M. Ishak</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20H.%20Shah"> L. H. Shah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study focuses on the effect of pin taper tool ratio on friction stir welding of magnesium alloy AZ31. Two pieces of AZ31 alloy with thickness of 6 mm were friction stir welded by using the conventional milling machine. The shoulder diameter used in this experiment is fixed at 18 mm. The taper pin ratio used are varied at 6:6, 6:5, 6:4, 6:3, 6:2 and 6:1. The rotational speeds that were used in this study were 500 rpm, 1000 rpm and 1500 rpm, respectively. The welding speeds used are 150 mm/min, 200 mm/min and 250 mm/min. Microstructure observation of welded area was studied by using optical microscope. Equiaxed grains were observed at the TMAZ and stir zone indicating fully plastic deformation. Tool pin diameter ratio 6/1 causes low heat input to the material because of small contact surface between tool surface and stirred materials compared to other tool pin diameter ratio. The grain size of stir zone increased with increasing of ratio of rotational speed to transverse speed due to higher heat input. It is observed that worm hole is produced when excessive heat input is applied. To evaluate the mechanical properties of this specimen, tensile test was used in this study. Welded specimens using taper pin ratio 6:1 shows higher tensile strength compared to other taper pin ratio up to 204 MPa. Moreover, specimens using taper pin ratio 6:1 showed better tensile strength with 500 rpm of rotational speed and 150mm/min welding speed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=friction%20stir%20welding" title="friction stir welding">friction stir welding</a>, <a href="https://publications.waset.org/abstracts/search?q=magnesium%20AZ31" title=" magnesium AZ31"> magnesium AZ31</a>, <a href="https://publications.waset.org/abstracts/search?q=cylindrical%20taper%20tool" title=" cylindrical taper tool"> cylindrical taper tool</a>, <a href="https://publications.waset.org/abstracts/search?q=taper%20pin%20ratio" title=" taper pin ratio"> taper pin ratio</a> </p> <a href="https://publications.waset.org/abstracts/46340/effect-of-taper-pin-ratio-on-microstructure-and-mechanical-property-of-friction-stir-welded-az31-magnesium-alloy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46340.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">286</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">4551</span> Effect of the Poisson’s Ratio on the Behavior of Epoxy Microbeam</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Tahmasebipour">Mohammad Tahmasebipour</a>, <a href="https://publications.waset.org/abstracts/search?q=Hosein%20Salarpour"> Hosein Salarpour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Researchers suggest that variations in Poisson’s ratio affect the behavior of Timoshenko micro beam. Therefore, in this study, two epoxy Timoshenko micro beams with different dimensions were modeled using the finite element method considering all boundary conditions and initial conditions that govern the problem. The effect of Poisson’s ratio on the resonant frequency, maximum deflection, and maximum rotation of the micro beams was examined. The analyses suggest that an increased Poisson’s ratio reduces the maximum rotation and the maximum rotation and increases the resonant frequency. Results were consistent with those obtained using the couple stress, classical, and strain gradient elasticity theories. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=microbeam" title="microbeam">microbeam</a>, <a href="https://publications.waset.org/abstracts/search?q=microsensor" title=" microsensor"> microsensor</a>, <a href="https://publications.waset.org/abstracts/search?q=epoxy" title=" epoxy"> epoxy</a>, <a href="https://publications.waset.org/abstracts/search?q=poisson%E2%80%99s%20ratio" title=" poisson’s ratio"> poisson’s ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20behavior" title=" dynamic behavior"> dynamic behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=static%20behavior" title=" static behavior"> static behavior</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/28163/effect-of-the-poissons-ratio-on-the-behavior-of-epoxy-microbeam" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28163.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">460</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=over-consolidation%20ratio&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=over-consolidation%20ratio&page=3">3</a></li> <li class="page-item"><a class="page-link" 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