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element</title> <meta name="description" content="Search results for: rare earth element"> <meta name="keywords" content="rare earth element"> <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 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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="rare earth element"> <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> 4717</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: rare earth element</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4627</span> Long-Persistent Luminescent MAl2O4:Eu;Dy Phoshors Synthesized by Combustion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yusuf%20Ziya%20Halefo%C4%9Flu">Yusuf Ziya Halefoğlu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Phosphorescence, classically, excitation effects (radiation, electron beam, electric field, temperature, etc.) is the name given after the elimination of materials that glow in the visible region. This event continues to glow after the elimination of the effect of excitation is called phosphorescence. In this study were synthesized by the method of the combustion lanthanide doped alkaline earth aluminates. High temperature and long reaction time required and the sol-gel method of combustion according to the methods of solid state synthesis temperature lower than the short reaction time, a small particle size, convenience, and is superior in terms of being secured. Their microstructures and its effect on the photoluminescence properties were studied. Phosphorescence is derived in the dark when produced materials are held in sunlight or under ultraviolet light typically at 365-520 nm wavelength range. In this study, the optimal ratio of rare earth elements, in terms of brightness and glow duration was examined by SEM, XRD and photoluminescence analysis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=persistence%20luminescence" title="persistence luminescence">persistence luminescence</a>, <a href="https://publications.waset.org/abstracts/search?q=phosphorescence" title=" phosphorescence"> phosphorescence</a>, <a href="https://publications.waset.org/abstracts/search?q=trap%20depth" title=" trap depth"> trap depth</a>, <a href="https://publications.waset.org/abstracts/search?q=combustion%20method" title=" combustion method"> combustion method</a> </p> <a href="https://publications.waset.org/abstracts/61246/long-persistent-luminescent-mal2o4eudy-phoshors-synthesized-by-combustion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61246.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">240</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">4626</span> Influence of Reinforcement Stiffness on the Performance of Back-to-Back Reinforced Earth Wall upon Rainwater Infiltration</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gopika%20Rajagopal">Gopika Rajagopal</a>, <a href="https://publications.waset.org/abstracts/search?q=Sudheesh%20Thiyyakkandi"> Sudheesh Thiyyakkandi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Back-to-back reinforced earth (RE) walls are extensively used in these days as bridge abutments and highway ramps, owing to their cost efficiency and ease of construction. High quality select fill is the most suitable backfill material due to its excellent engineering properties and constructability. However, industries are compelled to use low quality, locally available soil because of its ample availability on site. However, several failure cases of such walls are reported, especially subsequent to rainfall events. The stiffness of reinforcement is one of the major factors affecting the performance of RE walls. The present study focused on analyzing the effect of reinforcement stiffness on the performance of complete select fill, complete marginal fill, and hybrid-fill (i.e., combination of select and marginal fills) back-to-back RE walls, immediately after construction and upon rainwater infiltration through finite element modelling. A constant width to height (W/H) ratio of 3 and height (H) of 6 m was considered for the numerical analysis and the stiffness of reinforcement layers was varied from 500 kN/m to 10000 kN/m. Results showed that reinforcement stiffness had a noticeable influence on the response of RE wall, subsequent to construction as well as rainwater infiltration. Facing displacement was found to decrease and maximum reinforcement tension and factor of safety were observed to increase with increasing the stiffness of reinforcement. However, beyond a stiffness of 5000 kN/m, no significant reduction in facing displacement was observed. The behavior of fully marginal fill wall considered in this study was found to be reasonable even after rainwater infiltration when the high stiffness reinforcement layers are used. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=back-to-back%20reinforced%20earth%20wall" title="back-to-back reinforced earth wall">back-to-back reinforced earth wall</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20modelling" title=" finite element modelling"> finite element modelling</a>, <a href="https://publications.waset.org/abstracts/search?q=rainwater%20infiltration" title=" rainwater infiltration"> rainwater infiltration</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforcement%20stiffness" title=" reinforcement stiffness "> reinforcement stiffness </a> </p> <a href="https://publications.waset.org/abstracts/129634/influence-of-reinforcement-stiffness-on-the-performance-of-back-to-back-reinforced-earth-wall-upon-rainwater-infiltration" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/129634.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">155</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">4625</span> Double Magnetic Phase Transition in the Intermetallic Compound Gd₂AgSi₃</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Redrisse%20Djoumessi%20Fobasso">Redrisse Djoumessi Fobasso</a>, <a href="https://publications.waset.org/abstracts/search?q=Baidyanath%20Sahu"> Baidyanath Sahu</a>, <a href="https://publications.waset.org/abstracts/search?q=Andre%20M.%20Strydom"> Andre M. Strydom</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The R₂TX₃ (R = rare-earth, T = transition, and X = s and p block element) series of compounds are interesting owing to their fascinating structural and magnetic properties. In this present work, we have studied the magnetic and physical properties of the new Gd₂AgSi₃ polycrystalline compound. The sample was synthesized by the arc-melting method and confirmed to crystallize in the tetragonal α-ThSi₂-type crystal structure with space group I4/amd. Dc– and ac–magnetic susceptibility, specific heat, electrical resistivity, and magnetoresistance measurements were performed on the new compound. The structure provides a unique position in the unit cell for the magnetic trivalent Gd ion. Two magnetic phase transitions were consistently found in dc- and ac-magnetic susceptibility, heat capacity, and electrical resistivity at temperatures Tₙ₁ = 11 K and Tₙ₂ = 20 K, which is an indication of the complex magnetic behavior in this compound. The compound is found to be metamagnetic over a range of temperatures below and above Tₙ₁. From field-dependent electrical resistivity, it is confirmed that the compound shows unusual negative magnetoresistance in the antiferromagnetically ordered region. These results contribute to a better understanding of this class of materials. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=complex%20magnetic%20behavior" title="complex magnetic behavior">complex magnetic behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=metamagnetic" title=" metamagnetic"> metamagnetic</a>, <a href="https://publications.waset.org/abstracts/search?q=negative%20magnetoresistance" title=" negative magnetoresistance"> negative magnetoresistance</a>, <a href="https://publications.waset.org/abstracts/search?q=two%20magnetic%20phase%20transitions" title=" two magnetic phase transitions"> two magnetic phase transitions</a> </p> <a href="https://publications.waset.org/abstracts/120185/double-magnetic-phase-transition-in-the-intermetallic-compound-gd2agsi3" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/120185.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">122</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">4624</span> Forensic Investigation Into the Variation of Geological Properties of Soils Bintulu, Sarawak</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jaithish%20John">Jaithish John</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper a brief overview is provided of the developments in interdisciplinary knowledge exchange with use of soil and geological (earth) materials in the search for evidence. The aim is to provide background information on the role and value of understanding ‘earth materials’ from the crime scene through to microscopic scale investigations to support law enforcement agencies in solving criminal and environmental concerns and investigations. This involves the sampling, analysis, interpretation and explanation presentation of all these evidences. In this context, field and laboratory methods are highlighted for the controlled / referenced sample, alibi sample and questioned sample. The aim of forensic analyses of earth materials is to associate these samples taken from a questioned source to determine if there are similar and outstanding characteristics features of earth materials crucial to support the investigation to the questioned earth materials and compare it to the controlled / referenced sample and alibi samples. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=soil" title="soil">soil</a>, <a href="https://publications.waset.org/abstracts/search?q=texture" title=" texture"> texture</a>, <a href="https://publications.waset.org/abstracts/search?q=grain" title=" grain"> grain</a>, <a href="https://publications.waset.org/abstracts/search?q=microscopy" title=" microscopy"> microscopy</a> </p> <a href="https://publications.waset.org/abstracts/153045/forensic-investigation-into-the-variation-of-geological-properties-of-soils-bintulu-sarawak" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/153045.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">84</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">4623</span> Effect of Microstructure and Texture of Magnesium Alloy Due to Addition of Pb</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yebeen%20Ji">Yebeen Ji</a>, <a href="https://publications.waset.org/abstracts/search?q=Jimin%20Yun"> Jimin Yun</a>, <a href="https://publications.waset.org/abstracts/search?q=Kwonhoo%20Kim"> Kwonhoo Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Magnesium alloys were limited for industrial applications due to having a limited slip system and high plastic anisotropy. It has been known that specific textures were formed during processing (rolling, etc.), and These textures cause poor formability. To solve these problems, many researchers have studied controlling texture by adding rare-earth elements. However, the high cost limits their use; therefore, alternatives are needed to replace them. Although Pb addition doesn’t directly improve magnesium properties, it has been known to suppress the diffusion of other alloying elements and reduce grain boundary energy. These characteristics are similar to the additions of rare-earth elements, and a similar texture behavior is expected as well. However, there is insufficient research on this. Therefore, this study investigates the behavior of texture and microstructure development after adding Pb to magnesium. This study compared and analyzed AZ61 alloy and Mg-15wt%Pb alloy to determine the effect of adding solute elements. The alloy was hot rolled and annealed to form a single phase and initial texture. Afterward, the specimen was set to contraction and elongate parallel to the rolling surface and the rolling direction and then subjected to high-temperature plane strain compression under the conditions of 723K and 0.05/s. Microstructural analysis and texture measurements were performed by SEM-EBSD. The peak stress in the true strain-stress curve after compression was higher in AZ61, but the shape of the flow curve was similar for both alloys. For both alloys, continuous dynamic recrystallization was confirmed to occur during the compression process. The basal texture developed parallel to the compressed surface, and the pole density was lower in the Mg-15wt%Pb alloy. It is confirmed that this change in behavior is because the orientation distribution of recrystallized grains has a more random orientation compared to the parent grains when Pb is added. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mg" title="Mg">Mg</a>, <a href="https://publications.waset.org/abstracts/search?q=texture" title=" texture"> texture</a>, <a href="https://publications.waset.org/abstracts/search?q=Pb" title=" Pb"> Pb</a>, <a href="https://publications.waset.org/abstracts/search?q=DRX" title=" DRX"> DRX</a> </p> <a href="https://publications.waset.org/abstracts/181493/effect-of-microstructure-and-texture-of-magnesium-alloy-due-to-addition-of-pb" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/181493.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">49</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">4622</span> A 3D Eight Nodes Brick Finite Element Based on the Strain Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=L.%20Belounar">L. Belounar</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Gerraiche"> K. Gerraiche</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Rebiai"> C. Rebiai</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Benmebarek"> S. Benmebarek</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents the development of a new three dimensional brick finite element by the use of the strain based approach for the linear analysis of plate bending behavior. The developed element has the three essential external degrees of freedom (U, V and W) at each of the eight corner nodes. The displacements field of the developed element is based on assumed functions for the various strains satisfying the compatibility and the equilibrium equations. The performance of this element is evaluated on several problems related to thick and thin plate bending in linear analysis. The obtained results show the good performances and accuracy of the present element. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=brick%20element" title="brick element">brick element</a>, <a href="https://publications.waset.org/abstracts/search?q=strain%20approach" title=" strain approach"> strain approach</a>, <a href="https://publications.waset.org/abstracts/search?q=plate%20bending" title=" plate bending"> plate bending</a>, <a href="https://publications.waset.org/abstracts/search?q=civil%20engineering" title=" civil engineering "> civil engineering </a> </p> <a href="https://publications.waset.org/abstracts/18774/a-3d-eight-nodes-brick-finite-element-based-on-the-strain-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18774.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">494</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">4621</span> Elaboration of Sustainable Luminescence Material Based on Rare Earth Complexes for Solar Energy Conversion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Othmane%20Essahili">Othmane Essahili</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Ilsouk"> Mohamed Ilsouk</a>, <a href="https://publications.waset.org/abstracts/search?q=Carine%20Duhayon"> Carine Duhayon</a>, <a href="https://publications.waset.org/abstracts/search?q=Omar%20Moudam"> Omar Moudam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Due to their excellent and promising properties, a great deal of attention has recently been devoted to luminescent materials, particularly those utilizing rare earth elements. These materials play an essential role in low-cost energy conversion technology applications, such as luminescent solar concentrators (LSCs). They also have potential applications in Agri-PV systems and smart building windows. Luminescent materials based on europium (III) complexes are known for their high luminescence efficiency, long fluorescence lifetimes, and sharp emission bands. However, they present certain drawbacks related to their limited absorption capacity due to the forbidden 4f-4f electronic transitions. To address these drawbacks, using β-diketonate ligands as sensitizers appears as a promising solution to enhance luminescence intensity through the antenna effect, where the ligand's excited energy is transferred to the europium ions. In this study, we synthesized β-diketonate-based europium complexes with phenanthroline derivatives, modified with various methyl groups, to examine their effects on the complexes' stability in poly(methyl methacrylate) (PMMA) films. Our findings reveal that these complexes exhibit remarkable red emission and high photoluminescence quantum yield. Stability tests under different conditions for 1200 hours showed that complexes with a higher number of methyl substitutions offer improved photoluminescent stability and resistance to degradation, particularly in outdoor settings. This research underscores the potential of chemically tuned phenanthroline ligands in developing stable, efficient luminescent materials for future optoelectronic devices, including efficient and durable LSCs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=luminescent%20materials" title="luminescent materials">luminescent materials</a>, <a href="https://publications.waset.org/abstracts/search?q=photochemistry" title=" photochemistry"> photochemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=luminescent%20solar%20concentrators" title=" luminescent solar concentrators"> luminescent solar concentrators</a>, <a href="https://publications.waset.org/abstracts/search?q=%CE%B2-diketonate-based%20europium%20complexes" title=" β-diketonate-based europium complexes"> β-diketonate-based europium complexes</a> </p> <a href="https://publications.waset.org/abstracts/183297/elaboration-of-sustainable-luminescence-material-based-on-rare-earth-complexes-for-solar-energy-conversion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/183297.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">63</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">4620</span> Partial Replacement of Lateritic Soil with Crushed Rock Sand (Stone Dust) in Compressed Earth Brick Production</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Jungudo">A. M. Jungudo</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Lasan"> M. A. Lasan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Affordable housing has long been one of the basic necessities of life to man. The ever rising prices of building materials are one of the major causes of housing shortage in many developing countries. Breaching the gap of housing needs in developing countries like Nigeria is an awaiting task longing for attention. This is due to lack of research in the development of local materials that will suit the troubled economies of these countries. The use of earth material to meet the housing needs is a sustainable option and its material is freely available universally. However, people are doubtful of using the earth material due to its modest outlook and uncertain durability. This research aims at enhancing the durability of Compressed Earth Bricks (CEBs) using stone dust as a stabilizer. The result indicates that partial replacement of lateritic soil with stone dust at 30% improves its compressive strength along with abrasive resistance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=earth%20construction" title="earth construction">earth construction</a>, <a href="https://publications.waset.org/abstracts/search?q=durability" title=" durability"> durability</a>, <a href="https://publications.waset.org/abstracts/search?q=stone%20dust" title=" stone dust"> stone dust</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable" title=" sustainable"> sustainable</a> </p> <a href="https://publications.waset.org/abstracts/113416/partial-replacement-of-lateritic-soil-with-crushed-rock-sand-stone-dust-in-compressed-earth-brick-production" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/113416.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">131</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">4619</span> Investigation Of Eugan's, Optical Properties With Dft</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bahieddine.%20Bouabdellah">Bahieddine. Bouabdellah</a>, <a href="https://publications.waset.org/abstracts/search?q=Benameur.%20Amiri"> Benameur. Amiri</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelkader.nouri"> Abdelkader.nouri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Europium-doped gallium nitride (EuGaN) is a promising material for optoelectronic and thermoelectric devices. This study investigates its optical properties using density functional theory (DFT) with the FP-LAPW method and MBJ+U correction. The simulation substitutes a gallium atom with europium in a hexagonal GaN lattice (6% doping). Distinct absorption peaks are observed in the optical analysis. These results highlight EuGaN's potential for various applications and pave the way for further research on rare earth-doped materials. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=eugan" title="eugan">eugan</a>, <a href="https://publications.waset.org/abstracts/search?q=fp-lapw" title=" fp-lapw"> fp-lapw</a>, <a href="https://publications.waset.org/abstracts/search?q=dft" title=" dft"> dft</a>, <a href="https://publications.waset.org/abstracts/search?q=wien2k" title=" wien2k"> wien2k</a>, <a href="https://publications.waset.org/abstracts/search?q=mbj%20hubbard" title=" mbj hubbard"> mbj hubbard</a> </p> <a href="https://publications.waset.org/abstracts/185924/investigation-of-eugans-optical-properties-with-dft" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185924.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">66</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">4618</span> Abnormal Features of Two Quasiparticle Rotational Bands in Rare Earths</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kawalpreet%20Kalra">Kawalpreet Kalra</a>, <a href="https://publications.waset.org/abstracts/search?q=Alpana%20Goel"> Alpana Goel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The behaviour of the rotational bands should be smooth but due to large amount of inertia and decreased pairing it is not so. Many experiments have been done in the last few decades, and a large amount of data is available for comprehensive study in this region. Peculiar features like signature dependence, signature inversion, and signature reversal are observed in many two quasiparticle rotational bands of doubly odd and doubly even nuclei. At high rotational frequencies, signature and parity are the only two good quantum numbers available to label a state. Signature quantum number is denoted by α. Even-angular momentum states of a rotational band have α =0, and the odd-angular momentum states have α =1. It has been observed that the odd-spin members lie lower in energy up to a certain spin Ic; the normal signature dependence is restored afterwards. This anomalous feature is termed as signature inversion. The systematic of signature inversion in high-j orbitals for doubly odd rare earth nuclei have been done. Many unusual features like signature dependence, signature inversion and signature reversal are observed in rotational bands of even-even/odd-odd nuclei. Attempts have been made to understand these phenomena using several models. These features have been analyzed within the framework of the Two Quasiparticle Plus Rotor Model (TQPRM). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rotational%20bands" title="rotational bands">rotational bands</a>, <a href="https://publications.waset.org/abstracts/search?q=signature%20dependence" title=" signature dependence"> signature dependence</a>, <a href="https://publications.waset.org/abstracts/search?q=signature%20quantum%20number" title=" signature quantum number"> signature quantum number</a>, <a href="https://publications.waset.org/abstracts/search?q=two%20quasiparticle" title=" two quasiparticle"> two quasiparticle</a> </p> <a href="https://publications.waset.org/abstracts/84944/abnormal-features-of-two-quasiparticle-rotational-bands-in-rare-earths" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84944.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">168</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">4617</span> Removal of Basic Dyes from Aqueous Solutions with a Treated Spent Bleaching Earth</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Mana">M. Mana</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20S.%20Ouali"> M. S. Ouali</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20C.%20de%20Menorval"> L. C. de Menorval</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A spent bleaching earth from an edible oil refinery has been treated by impregnation with a normal sodium hydroxide solution followed by mild thermal treatment (100°C). The obtained material (TSBE) was washed, dried and characterized by X-ray diffraction, FTIR, SEM, BET, and thermal analysis. The clay structure was not apparently affected by the treatment and the impregnated organic matter was quantitatively removed. We have investigated the comparative sorption of safranine and methylene blue on this material, the spent bleaching earth (SBE) and the virgin bleaching earth (VBE). The kinetic results fit the pseudo second order kinetic model and the Weber & Morris, intra-particle diffusion model. The pH had no effect on the sorption efficiency. The sorption isotherms followed the Langmuir model for various sorbent concentrations with good values of determination coefficient. A linear relationship was found between the calculated maximum removal capacity and the solid/solution ratio. A comparison between the results obtained with this material and those of the literature highlighted the low cost and the good removal capacity of the treated spent bleaching earth. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=basic%20dyes" title="basic dyes">basic dyes</a>, <a href="https://publications.waset.org/abstracts/search?q=isotherms" title=" isotherms"> isotherms</a>, <a href="https://publications.waset.org/abstracts/search?q=sorption" title=" sorption"> sorption</a>, <a href="https://publications.waset.org/abstracts/search?q=spent%20bleaching%20earth" title=" spent bleaching earth"> spent bleaching earth</a> </p> <a href="https://publications.waset.org/abstracts/34446/removal-of-basic-dyes-from-aqueous-solutions-with-a-treated-spent-bleaching-earth" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34446.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">249</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">4616</span> Europium Chelates as a Platform for Biosensing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Eiman%20A.%20Al-Enezi">Eiman A. Al-Enezi</a>, <a href="https://publications.waset.org/abstracts/search?q=Gin%20Jose"> Gin Jose</a>, <a href="https://publications.waset.org/abstracts/search?q=Sikha%20Saha"> Sikha Saha</a>, <a href="https://publications.waset.org/abstracts/search?q=Paul%20Millner"> Paul Millner</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Rare earth nanotechnology has gained a considerable amount of interest in the field of biosensing due to the unique luminescence properties of lanthanides. Chelating rare earth ions plays a significant role in biological labelling applications including medical diagnostics, due to their different excitation and emission wavelengths, variety of their spectral properties, sharp emission peaks and long fluorescence lifetimes. We aimed to develop a platform for biosensors based on Europium (Eu³⁺) chelates against biomarkers of cardiac injury (heart-type fatty acid binding protein; H-FABP3) and stroke (glial fibrillary acidic protein; GFAP). Additional novelty in this project is the use of synthetic binding proteins (Affimers), which could offer an excellent alternative targeting strategy to the existing antibodies. Anti-GFAP and anti-HFABP3 Affimer binders were modified to increase the number of carboxy functionalities. Europium nitrate then incubated with the modified Affimer. The luminescence characteristics of the Eu³⁺ complex with modified Affimers and antibodies against anti-GFAP and anti-HFABP3 were measured against different concentrations of the respective analytes on excitation wavelength of 395nm. Bovine serum albumin (BSA) was used as a control against the IgG/Affimer Eu³⁺ complexes. The emission spectrum of Eu³⁺ complex resulted in 5 emission peaks ranging between 550-750 nm with the highest intensity peaks were at 592 and 698 nm. The fluorescence intensity of Eu³⁺ chelates with the modified Affimer or antibodies increased significantly by 4-7 folder compared to the emission spectrum of Eu³⁺ complex. The fluorescence intensity of the Affimer complex was quenched proportionally with increased analyte concentration, but this did not occur with antibody complex. In contrast, the fluorescence intensity for Eu³⁺ complex increased slightly against increased concentration of BSA. These data demonstrate that modified Affimers Eu³⁺ complexes can function as nanobiosensors with potential diagnostic and analytical applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lanthanides" title="lanthanides">lanthanides</a>, <a href="https://publications.waset.org/abstracts/search?q=europium" title=" europium"> europium</a>, <a href="https://publications.waset.org/abstracts/search?q=chelates" title=" chelates"> chelates</a>, <a href="https://publications.waset.org/abstracts/search?q=biosensors" title=" biosensors"> biosensors</a> </p> <a href="https://publications.waset.org/abstracts/73657/europium-chelates-as-a-platform-for-biosensing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73657.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">525</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">4615</span> Programmable Shields in Space</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tapas%20Kumar%20Sinha">Tapas Kumar Sinha</a>, <a href="https://publications.waset.org/abstracts/search?q=Joseph%20Mathew"> Joseph Mathew</a> </p> <p class="card-text"><strong>Abstract:</strong></p> At the moment earth is in grave danger due to threats of global warming. The temperature of the earth has risen by almost 20C. Glaciers in the Arctic have started to melt. It would be foolhardy to think that this is a small effect and in time it would go away. Global warming is caused by a number of factors. However, one sure and simple way to totally eliminate this problem is to put programmable shields in space. Just as an umbrella blocks sunlight, a programmable shield in space will block sun rays from reaching the earth as in a solar eclipse and cause cooling in the penumbral region just as it happens during an eclipse. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=glaciers" title="glaciers">glaciers</a>, <a href="https://publications.waset.org/abstracts/search?q=green%20house" title=" green house"> green house</a>, <a href="https://publications.waset.org/abstracts/search?q=global%20warming%20space" title=" global warming space"> global warming space</a>, <a href="https://publications.waset.org/abstracts/search?q=satellites" title=" satellites "> satellites </a> </p> <a href="https://publications.waset.org/abstracts/29124/programmable-shields-in-space" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29124.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">599</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">4614</span> Geochemical Approach of Rare Earth Element Distribution: A Case Study from Lake Acigol, Denizli, Turkey</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Budakoglu">M. Budakoglu</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Karaman"> M. Karaman</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Abdelnasser"> A. Abdelnasser</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Kiran"> D. Kiran</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Kumral"> M. Kumral</a> </p> <p class="card-text"><strong>Abstract:</strong></p> About 50 mg lake sediment was digested in two steps. While first stage was completed with 6 ml 37% HCl, 2 ml 65% HNO3 and 1 ml 38-40% HF in an pressure and temperature controlled Teflon beaker using Berghoff Microwave™ at average 135°C, digestion procedure was completed with the addition of 6 ml 5% boric acid solution. REE contents of sediment samples were determined by Perkin Elmer DRC II ICP-MS in Geochemistry Research Laboratories (JAL/GRL) of Faculty of Mines, Istanbul Technical University. Chondrite-normalized REE patterns of Lake Acıgöl sediments show generally high abundance of REE compared to chondritic concentrations, with particular enrichment in LREE [(La/Lu)N = 4.85-19.90], [(La/Lu)N = 7.09-15.14], [(La/Lu)N = 9.42-15.52] and [(La/Lu)N = 7.69-15.63] for the surface sediment and 0-10 cm-, 10-20 cm- and 20-30 cm-subsurface sediments respectively. Also these samples showed flat HREE normalized to chondrite as (La/Sm)N ranging from 2.98 to 4.8 for surface sediments and for subsurface sediments from 3.28 to 3.97 (0-10 cm), 3.57 to 3.94 (10-20 cm) and 3.36 to 3.94 (20-30 cm) while (Gd/Yb)N ranging from 2.14 to 2.93, from 2.03 to 2.76, from 2.26 to 2.79 and from 2.05 to 2.76 from the surface and subsurface sediments respectively. Moreover, their REE profiles are similar to profiles of the continental collision basin (CCB) with negative Eu anomalies. In addition, their REE patterns illustrate generally low abundance of REE compared to concentrations of NASC, PAAS and UCC with very slight enrichment of LREE and positive Eu* anomalies. Therefore there is no comparable between our samples of surface and subsurface sediments and these types of international sediments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chondrite-normalized%20REE%20patterns" title="chondrite-normalized REE patterns">chondrite-normalized REE patterns</a>, <a href="https://publications.waset.org/abstracts/search?q=hypersaline%20lake" title=" hypersaline lake"> hypersaline lake</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20sediments" title=" surface sediments"> surface sediments</a>, <a href="https://publications.waset.org/abstracts/search?q=subsurface%20sediments" title=" subsurface sediments"> subsurface sediments</a>, <a href="https://publications.waset.org/abstracts/search?q=Lake%20Ac%C4%B1g%C3%B6l" title=" Lake Acıgöl"> Lake Acıgöl</a>, <a href="https://publications.waset.org/abstracts/search?q=Turkey" title=" Turkey"> Turkey</a> </p> <a href="https://publications.waset.org/abstracts/10632/geochemical-approach-of-rare-earth-element-distribution-a-case-study-from-lake-acigol-denizli-turkey" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10632.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">520</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">4613</span> A Study on Improvement of the Torque Ripple and Demagnetization Characteristics of a PMSM</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yong%20Min%20You">Yong Min You</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study on the torque ripple of Permanent Magnet Synchronous Motors (PMSMs) has been rapidly progressed, which effects on the noise and vibration of the electric vehicle. There are several ways to reduce torque ripple, which are the increase in the number of slots and poles, the notch of the rotor and stator teeth, and the skew of the rotor and stator. However, the conventional methods have the disadvantage in terms of material cost and productivity. The demagnetization characteristic of PMSMs must be attained for electric vehicle application. Due to rare earth supply issue, the demand for Dy-free permanent magnet has been increasing, which can be applied to PMSMs for the electric vehicle. Dy-free permanent magnet has lower the coercivity; the demagnetization characteristic has become more significant. To improve the torque ripple as well as the demagnetization characteristics, which are significant parameters for electric vehicle application, an unequal air-gap model is proposed for a PMSM. A shape optimization is performed to optimize the design variables of an unequal air-gap model. Optimal design variables are the shape of an unequal air-gap and the angle between V-shape magnets. An optimization process is performed by Latin Hypercube Sampling (LHS), Kriging Method, and Genetic Algorithm (GA). Finite element analysis (FEA) is also utilized to analyze the torque and demagnetization characteristics. The torque ripple and the demagnetization temperature of the initial model of 45kW PMSM with unequal air-gap are 10 % and 146.8 degrees, respectively, which are reaching a critical level for electric vehicle application. Therefore, the unequal air-gap model is proposed, and then an optimization process is conducted. Compared to the initial model, the torque ripple of the optimized unequal air-gap model was reduced by 7.7 %. In addition, the demagnetization temperature of the optimized model was also increased by 1.8 % while maintaining the efficiency. From these results, a shape optimized unequal air-gap PMSM has shown the usefulness of an improvement in the torque ripple and demagnetization temperature for the electric vehicle. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=permanent%20magnet%20synchronous%20motor" title="permanent magnet synchronous motor">permanent magnet synchronous motor</a>, <a href="https://publications.waset.org/abstracts/search?q=optimal%20design" title=" optimal design"> optimal design</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=torque%20ripple" title=" torque ripple"> torque ripple</a> </p> <a href="https://publications.waset.org/abstracts/63559/a-study-on-improvement-of-the-torque-ripple-and-demagnetization-characteristics-of-a-pmsm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63559.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">4612</span> A Rare Atypical Presentation of Iichthyosis Follicularis, Alopecia, and Photophobia Syndrome</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=D.%20R.%20Apoorva">D. R. Apoorva</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ichthyosis follicularis, alopecia, and photophobia (IFAP) syndrome is a rare oculocutaneous disorder of genetic origin. This disorder results from mutations in the membrane-bound transcription factor protease site, two genes that impair cholesterol homeostasis, and the ability to cope with endoplasmic reticulum stress. We report a rare case of IFAP syndrome with an atypical presentation, and it was interesting to note that the child had patchy non-scarring alopecia over the scalp along with unilateral madarosis. To our best knowledge, this unique presentation has not been described earlier. The child presented with photophobia and unilateral ptosis. The child also had short stature and intellectual disability. Skin histopathology was nonspecific and consisted of dilated hair follicles with keratin plugs extending above the skin surface. This rare oculocutaneous disorder requires proper documentation so that identification of its variants may be possible in the future. Early recognition of atypical presentations can help in preventing cardiovascular complications, which remain the major cause of death. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=alopecia" title="alopecia">alopecia</a>, <a href="https://publications.waset.org/abstracts/search?q=photophobia" title=" photophobia"> photophobia</a>, <a href="https://publications.waset.org/abstracts/search?q=ichthyosis%20follicularis" title=" ichthyosis follicularis"> ichthyosis follicularis</a>, <a href="https://publications.waset.org/abstracts/search?q=IFAP%20syndrome" title=" IFAP syndrome"> IFAP syndrome</a> </p> <a href="https://publications.waset.org/abstracts/152090/a-rare-atypical-presentation-of-iichthyosis-follicularis-alopecia-and-photophobia-syndrome" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152090.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">4611</span> Jalovchat Gabbroic Intrusive of the Caucasus: Petrological Study, Geochemical Peculiarities and Formation Conditions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Giorgi%20Chichinadze">Giorgi Chichinadze</a>, <a href="https://publications.waset.org/abstracts/search?q=David%20Shengelia"> David Shengelia</a>, <a href="https://publications.waset.org/abstracts/search?q=Tamara%20Tsutsunava"> Tamara Tsutsunava</a>, <a href="https://publications.waset.org/abstracts/search?q=Nikoloz%20Maisuradze"> Nikoloz Maisuradze</a>, <a href="https://publications.waset.org/abstracts/search?q=Giorgi%20Beridze"> Giorgi Beridze</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Jalovchat intrusive is built up of hornblende gabbros, gabbro-norites and norites. Within the intrusive hornblende-bearing gabbro-pegmatites are widespread. That is a coarse-grained rock with gigantic hornblende crystals. By its unusual composition, the Jalovchat intrusive has no analogue in the Caucasus. However, petrologically and geochemically, the intrusive rocks were studied insufficiently. For comprehensive investigations, the authors applied appropriate methodologies: Microscopic study of thin sections, petro- and geochemical analyses of the samples and also different petrogenic, rare and rare earth elements diagrams and spidergrams. Analytical study established that the Jalovchat intrusive by its composition corresponds mainly to the mid-ocean ridge basalts and according to geodynamic type belongs to the subduction type. In general, it is an anomalous phenomenon, as in the rocks of such composition crystallization of hornblende and especially of its gigantic crystals is atypical. The authors believe that the water-rich magma reservoir, which was necessary for the crystallization of gigantic hornblende crystals, appeared as a result of melting of water-rich mid-ocean ridge basaltic rocks during the subduction process in Bajocian time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gabbro-pegmatite" title="gabbro-pegmatite">gabbro-pegmatite</a>, <a href="https://publications.waset.org/abstracts/search?q=intrusive" title=" intrusive"> intrusive</a>, <a href="https://publications.waset.org/abstracts/search?q=petrogenesis" title=" petrogenesis"> petrogenesis</a>, <a href="https://publications.waset.org/abstracts/search?q=petrogeochemistry" title=" petrogeochemistry"> petrogeochemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=the%20Caucasus" title=" the Caucasus"> the Caucasus</a> </p> <a href="https://publications.waset.org/abstracts/90754/jalovchat-gabbroic-intrusive-of-the-caucasus-petrological-study-geochemical-peculiarities-and-formation-conditions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90754.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">209</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">4610</span> Colocalization Analysis to Understand Yttrium Uptake in Saxifraga paniculata Using Complementary Imaging Technics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Till%20Fehlauer">Till Fehlauer</a>, <a href="https://publications.waset.org/abstracts/search?q=Blanche%20Collin"> Blanche Collin</a>, <a href="https://publications.waset.org/abstracts/search?q=Bernard%20Angeletti"> Bernard Angeletti</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrea%20Somogyi"> Andrea Somogyi</a>, <a href="https://publications.waset.org/abstracts/search?q=Claire%20Lallemand"> Claire Lallemand</a>, <a href="https://publications.waset.org/abstracts/search?q=Perrine%20Chaurand"> Perrine Chaurand</a>, <a href="https://publications.waset.org/abstracts/search?q=Ce%CC%81dric%20Dentant"> Cédric Dentant</a>, <a href="https://publications.waset.org/abstracts/search?q=Clement%20Levard"> Clement Levard</a>, <a href="https://publications.waset.org/abstracts/search?q=Jerome%20Rose"> Jerome Rose</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Over the last decades, yttrium (Y) has gained importance in high-tech applications. It is an essential part of alloys and compounds used for lasers, displays, or cell phones, for example. Due to its chemical similarities with the lanthanides, Y is often considered a rare earth element (REE). Despite their increased usage, the environmental behavior of REEs remains poorly understood. Especially regarding their interactions with plants, many uncertainties exist. On the one hand, Y is known to have a negative effect on root development and germination, but on the other hand, it appears to promote plant growth at low concentrations. In order to understand these phenomena, a precise knowledge is necessary about how Y is absorbed by the plant and how it is handled once inside the organism. Contradictory studies exist, stating that due to a similar ionic radius, Y and the other REEs might be absorbed through Ca²⁺-channels, while others suspect that Y has a shared pathway with Al³⁺. In this study, laser ablation coupled ICP-MS, and synchrotron-based micro-X-ray fluorescence (µXRF, beamline Nanoscopium, SOLEIL, France) have been used in order to localize Y within the plant tissue and identify associated elements. The plant used in this study is Saxifraga paniculata, a rugged alpine plant that has shown an affinity for Y in previous studies (in prep.). Furthermore, Saxifraga paniculata performs guttation, which means that it possesses phloem sap secreting openings on the leaf surface that serve to regulate root pressure. These so-called hydathodes could provide special insights in elemental transport in plants. The plants have been grown on Y doped soil (500mg/kg DW) for four months. The results showed that Y was mainly concentrated in the roots of Saxifraga paniculata (260 ± 85mg/kg), and only a small amount was translocated to the leaves (10 ± 7.8mg/kg). µXRF analysis indicated that within the root transects, the majority of Y remained in the epidermis and hardly penetrated the stele. Laser ablation coupled ICP-MS confirmed this finding and showed a positive correlation in the roots between Y, Fe, Al, and to a lesser extent Ca. In the stem transect, Y was mainly detected in a hotspot of approximately 40µm in diameter situated in the endodermis area. Within the stem and especially in the hotspot, Y was highly colocalized with Al and Fe. Similar-sized Y hotspots have been detected in/on the leaves. All of them were strongly colocalized with Al and Fe, except for those situated within the hydathodes, which showed no colocalization with any of the measured elements. Accordingly, a relation between Y and Ca during root uptake remains possible, whereas a correlation to Fe and Al appears to be dominant in the aerial parts, suggesting common storage compartments, the formation of complexes, or a shared pathway during translocation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser%20ablation%20inductively%20coupled%20plasma%20mass%20spectrometry%20%28LA-ICP-MS%29" title="laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS)">laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS)</a>, <a href="https://publications.waset.org/abstracts/search?q=Phytoaccumulation" title=" Phytoaccumulation"> Phytoaccumulation</a>, <a href="https://publications.waset.org/abstracts/search?q=Rare%20earth%20elements" title=" Rare earth elements"> Rare earth elements</a>, <a href="https://publications.waset.org/abstracts/search?q=Saxifraga%20paniculata" title=" Saxifraga paniculata"> Saxifraga paniculata</a>, <a href="https://publications.waset.org/abstracts/search?q=Synchrotron-based%20micro-X-ray%20fluorescence" title=" Synchrotron-based micro-X-ray fluorescence"> Synchrotron-based micro-X-ray fluorescence</a>, <a href="https://publications.waset.org/abstracts/search?q=Yttrium" title=" Yttrium"> Yttrium</a> </p> <a href="https://publications.waset.org/abstracts/135671/colocalization-analysis-to-understand-yttrium-uptake-in-saxifraga-paniculata-using-complementary-imaging-technics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/135671.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">148</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4609</span> A Rare Case Report of Wandering Spleen Torsion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Steven%20Robinson">Steven Robinson</a>, <a href="https://publications.waset.org/abstracts/search?q=Adriana%20Dager"> Adriana Dager</a>, <a href="https://publications.waset.org/abstracts/search?q=Param%20Patel"> Param Patel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Wandering spleen is a rare variant where there is abnormal development of the ligamentous peritoneal attachments of the spleen which normally anchor it in the left upper quadrant of the abdomen. Ligamentous abnormalities can be congenital, or acquired through pregnancy, injury, or iatrogenic causes. Absence or laxity of these ligaments allows migration of the spleen into ectopic portions of the abdomen, which is also associated with an elongated vascular pedicle. Incidence of wandering spleen is reported at less than 0.25% with a female to male ratio of approximately 6:1. The most common complication of a wandering spleen is torsion around its vascular pedicle which can lead to thrombosis and infarction. Torsion of a wandering spleen is a rare but important cause of an acute abdomen. Imaging, and specifically CT or ultrasound, is crucial in the diagnosis. We present a case of a torsed wandering spleen which was treated with splenectomy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wandering%20Spleen" title="Wandering Spleen">Wandering Spleen</a>, <a href="https://publications.waset.org/abstracts/search?q=Torsion" title=" Torsion"> Torsion</a>, <a href="https://publications.waset.org/abstracts/search?q=Splenic%20Torsion" title=" Splenic Torsion"> Splenic Torsion</a>, <a href="https://publications.waset.org/abstracts/search?q=Spleen" title=" Spleen"> Spleen</a> </p> <a href="https://publications.waset.org/abstracts/162557/a-rare-case-report-of-wandering-spleen-torsion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162557.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">81</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">4608</span> Seismic Active Earth Pressure on Retaining Walls with Reinforced Backfill</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jagdish%20Prasad%20Sahoo">Jagdish Prasad Sahoo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The increase in active earth pressure during the event of an earthquake results sliding, overturning and tilting of earth retaining structures. In order to improve upon the stability of structures, the soil mass is often reinforced with various types of reinforcements such as metal strips, geotextiles, and geogrids etc. The stresses generated in the soil mass are transferred to the reinforcements through the interface friction between the earth and the reinforcement, which in turn reduces the lateral earth pressure on the retaining walls. Hence, the evaluation of earth pressure in the presence of seismic forces with an inclusion of reinforcements is important for the design retaining walls in the seismically active zones. In the present analysis, the effect of reinforcing horizontal layers of reinforcements in the form of sheets (Geotextiles and Geogrids) in sand used as backfill, on reducing the active earth pressure due to earthquake body forces has been studied. For carrying out the analysis, pseudo-static approach has been adopted by employing upper bound theorem of limit analysis in combination with finite elements and linear optimization. The computations have been performed with and out reinforcements for different internal friction angle of sand varying from 30 ° to 45 °. The effectiveness of the reinforcement in reducing the active earth pressure on the retaining walls is examined in terms of active earth pressure coefficient for presenting the solutions in a non-dimensional form. The active earth pressure coefficient is expressed as functions of internal friction angle of sand, interface friction angle between sand and reinforcement, soil-wall interface roughness conditions, and coefficient of horizontal seismic acceleration. It has been found that (i) there always exists a certain optimum depth of the reinforcement layers corresponding to which the value of active earth pressure coefficient becomes always the minimum, and (ii) the active earth pressure coefficient decreases significantly with an increase in length of reinforcements only up to a certain length beyond which a further increase in length hardly causes any reduction in the values active earth pressure. The optimum depth of the reinforcement layers and the required length of reinforcements corresponding to the optimum depth of reinforcements have been established. The numerical results developed in this analysis are expected to be useful for purpose of design of retaining walls. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active" title="active">active</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20elements" title=" finite elements"> finite elements</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20analysis" title=" limit analysis"> limit analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=presudo-static" title=" presudo-static"> presudo-static</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforcement" title=" reinforcement"> reinforcement</a> </p> <a href="https://publications.waset.org/abstracts/39227/seismic-active-earth-pressure-on-retaining-walls-with-reinforced-backfill" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/39227.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">365</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">4607</span> The Element of Episode and Idea in the Descriptive Poetry of Hutai'A</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abubakar%20Ismaila%20Yusuf">Abubakar Ismaila Yusuf</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research studied element of episode (events) and idea in the descriptive poetry of Hutai’a with the intention to sale the opinion of this type of analysis to others, and also encourage and open door for researchers that thinks only in drama and novel those elements can be implemented. The research uses explanatory method to point out the element of episode and ideology from the said poetry to show that the same element of drama can be seen in poetry. The research finds that element of drama and novel can be seen and implemented analytically in dramatic and some descriptive poetry and its likes. The researcher finally advice colleague to widened scope of research and always think of modernizing it. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hutai%27a" title="Hutai'a">Hutai'a</a>, <a href="https://publications.waset.org/abstracts/search?q=poetry" title=" poetry"> poetry</a>, <a href="https://publications.waset.org/abstracts/search?q=drama" title=" drama"> drama</a>, <a href="https://publications.waset.org/abstracts/search?q=novel" title=" novel"> novel</a> </p> <a href="https://publications.waset.org/abstracts/48474/the-element-of-episode-and-idea-in-the-descriptive-poetry-of-hutaia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48474.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">344</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4606</span> Effects of Magnetization Patterns on Characteristics of Permanent Magnet Linear Synchronous Generator for Wave Energy Converter Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sung-Won%20Seo">Sung-Won Seo</a>, <a href="https://publications.waset.org/abstracts/search?q=Jang-Young%20Choi"> Jang-Young Choi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The rare earth magnets used in synchronous generators offer many advantages, including high efficiency, greatly reduced the size, and weight. The permanent magnet linear synchronous generator (PMLSG) allows for direct drive without the need for a mechanical device. Therefore, the PMLSG is well suited to translational applications, such as wave energy converters and free piston energy converters. This manuscript compares the effects of different magnetization patterns on the characteristics of double-sided PMLSGs in slotless stator structures. The Halbach array has a higher flux density in air-gap than the Vertical array, and the advantages of its performance and efficiency are widely known. To verify the advantage of Halbach array, we apply a finite element method (FEM) and analytical method. In general, a FEM and an analytical method are used in the electromagnetic analysis for determining model characteristics, and the FEM is preferable to magnetic field analysis. However, the FEM is often slow and inflexible. On the other hand, the analytical method requires little time and produces accurate analysis of the magnetic field. Therefore, the flux density in air-gap and the Back-EMF can be obtained by FEM. In addition, the results from the analytical method correspond well with the FEM results. The model of the Halbach array reveals less copper loss than the model of the Vertical array, because of the Halbach array’s high output power density. The model of the Vertical array is lower core loss than the model of Halbach array, because of the lower flux density in air-gap. Therefore, the current density in the Vertical model is higher for identical power output. The completed manuscript will include the magnetic field characteristics and structural features of both models, comparing various results, and specific comparative analysis will be presented for the determination of the best model for application in a wave energy converting system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=wave%20energy%20converter" title="wave energy converter">wave energy converter</a>, <a href="https://publications.waset.org/abstracts/search?q=permanent%20magnet%20linear%20synchronous%20generator" title=" permanent magnet linear synchronous generator"> permanent magnet linear synchronous generator</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=analytical%20method" title=" analytical method"> analytical method</a> </p> <a href="https://publications.waset.org/abstracts/65820/effects-of-magnetization-patterns-on-characteristics-of-permanent-magnet-linear-synchronous-generator-for-wave-energy-converter-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65820.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">301</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">4605</span> Nd³⁺: Si₂N₂O (Sinoite) Phosphors for White Light Emitting Diodes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alparslan%20A.%20Balta">Alparslan A. Balta</a>, <a href="https://publications.waset.org/abstracts/search?q=Hilmi%20Yurdakul"> Hilmi Yurdakul</a>, <a href="https://publications.waset.org/abstracts/search?q=Orkun%20Tunckan"> Orkun Tunckan</a>, <a href="https://publications.waset.org/abstracts/search?q=Servet%20Turan"> Servet Turan</a>, <a href="https://publications.waset.org/abstracts/search?q=Arife%20Yurdakul"> Arife Yurdakul</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A silicon oxynitride (Si2N2O), the mineralogical name is “Sinoite”, reveals the outstanding physical, mechanical and thermal properties, e.g., good oxidation resistance at high temperatures, high fracture toughness with rod shape, high hardness, low theoretical density, good thermal shock resistance by low thermal expansion coefficient and high thermal conductivity. In addition, the orthorhombic crystal structure of Si2N2O allows accommodating the rare earth (RE) element atoms along the “c” axis due to existing large structural interstitial sites. Here, 0.02 to 0.12 wt. % Nd3+ doped Si2N2O samples were successfully synthesized by spark plasma sintering (SPS) method at 30MPa pressure and 1650oC temperature. Li2O was also utilized as a sintering additive to take advantage of low eutectic point during synthesizing. The specimens were characterized in detail by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and cathodoluminescence (CL) in SEM and photoluminescence (PL) spectroscopy. Based on the overall results, the Si2N2O phase was obtained above 90% by the SPS route. Furthermore, Nd3+: Si2N2O samples showed a very broad intense emission peak between 400-700 nm, which corresponds to white color. Therefore, this material can be considered as a promising candidate for white light-emitting diodes (WLEDs) purposes. This study was supported by TUBITAK under project number 217M667. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=neodymium" title="neodymium">neodymium</a>, <a href="https://publications.waset.org/abstracts/search?q=oxynitride" title=" oxynitride"> oxynitride</a>, <a href="https://publications.waset.org/abstracts/search?q=Si%E2%82%82N%E2%82%82O" title=" Si₂N₂O"> Si₂N₂O</a>, <a href="https://publications.waset.org/abstracts/search?q=WLEDs" title=" WLEDs"> WLEDs</a> </p> <a href="https://publications.waset.org/abstracts/121687/nd3-si2n2o-sinoite-phosphors-for-white-light-emitting-diodes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/121687.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">4604</span> A Forbidden-Minor Characterization for the Class of Co-Graphic Matroids Which Yield the Graphic Element-Splitting Matroids</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Prashant%20Malavadkar">Prashant Malavadkar</a>, <a href="https://publications.waset.org/abstracts/search?q=Santosh%20Dhotre"> Santosh Dhotre</a>, <a href="https://publications.waset.org/abstracts/search?q=Maruti%20Shikare"> Maruti Shikare</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The n-point splitting operation on graphs is used to characterize 4-connected graphs with some more operations. Element splitting operation on binary matroids is a natural generalization of the notion of n-point splitting operation on graphs. The element splitting operation on a graphic (cographic) matroid may not yield a graphic (cographic) matroid. Characterization of graphic (cographic) matroids whose element splitting matroids are graphic (cographic) is known. The element splitting operation on a co-graphic matroid, in general may not yield a graphic matroid. In this paper, we give a necessary and sufficient condition for the cographic matroid to yield a graphic matroid under the element splitting operation. In fact, we prove that the element splitting operation, by any pair of elements, on a cographic matroid yields a graphic matroid if and only if it has no minor isomorphic to M(K4); where K4 is the complete graph on 4 vertices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=binary%20matroids" title="binary matroids">binary matroids</a>, <a href="https://publications.waset.org/abstracts/search?q=splitting" title=" splitting"> splitting</a>, <a href="https://publications.waset.org/abstracts/search?q=element%20splitting" title=" element splitting"> element splitting</a>, <a href="https://publications.waset.org/abstracts/search?q=forbidden%20minor" title=" forbidden minor"> forbidden minor</a> </p> <a href="https://publications.waset.org/abstracts/59445/a-forbidden-minor-characterization-for-the-class-of-co-graphic-matroids-which-yield-the-graphic-element-splitting-matroids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59445.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">276</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">4603</span> Optically Active Material Based on Bi₂O₃@Yb³⁺, Nd³⁺ with High Intensity of Upconversion Luminescence in Red and Green Region</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=D.%20Artamonov">D. Artamonov</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Tsibulnikova"> A. Tsibulnikova</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Samusev"> I. Samusev</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Bryukhanov"> V. Bryukhanov</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Kozhevnikov"> A. Kozhevnikov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The synthesis and luminescent properties of Yb₂O₃, Nd₂O₃@Bi₂O₃ complex with upconversion generation are discussed in this work. The obtained samples were measured in the visible region of the spectrum under excitation with a wavelength of 980 nm. The studies showed that the obtained complexes have a high degree of stability and intense luminescence in the wavelength range of 400-750 nm. Consideration of the time dependence of the intensity of the upconversion luminescence allowed us to conclude that the enhancement of the intensity occurs in the time interval from 5 to 30 min, followed by the appearance of a stationary mode. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lasers" title="lasers">lasers</a>, <a href="https://publications.waset.org/abstracts/search?q=luminescence" title=" luminescence"> luminescence</a>, <a href="https://publications.waset.org/abstracts/search?q=upconversion%20photonics" title=" upconversion photonics"> upconversion photonics</a>, <a href="https://publications.waset.org/abstracts/search?q=rare%20earth%20metals" title=" rare earth metals"> rare earth metals</a> </p> <a href="https://publications.waset.org/abstracts/167659/optically-active-material-based-on-bi2o3-at-yb3-nd3-with-high-intensity-of-upconversion-luminescence-in-red-and-green-region" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167659.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">4602</span> The Interactive Effect of Sodium Chloride and Diatomaceous Earth (DE) on Bacillus aquimaris </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bassam%20O%20AlJohny">Bassam O AlJohny</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The growth of Bacillus aquimaris was inhibited from 6 - 20 % of NaCl but it showed some tolerance when Diatomaceous earth (DE) added from 2 - 12% NaCl. Concerning the effect of NaCl on polyol production, we can conclude that, the test bacterium showed some tolerance to NaCl by producing glycerol up to 8 % of NaCl. Then decreased sharply. The addition of DE decrease the amount of polyol and glycerol remarkably and this due to the productive effect of DE to the bacterial cells. The SEM figures represented the presence of electron dense bodies due to the accumulation of small particles of DE as protective molecules. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bacillus%20aquimaris" title="Bacillus aquimaris">Bacillus aquimaris</a>, <a href="https://publications.waset.org/abstracts/search?q=Diatomaceous%20earth%20%28DE%29" title=" Diatomaceous earth (DE)"> Diatomaceous earth (DE)</a>, <a href="https://publications.waset.org/abstracts/search?q=osmoticstress" title=" osmoticstress"> osmoticstress</a>, <a href="https://publications.waset.org/abstracts/search?q=sodium%20chloride" title=" sodium chloride "> sodium chloride </a> </p> <a href="https://publications.waset.org/abstracts/32350/the-interactive-effect-of-sodium-chloride-and-diatomaceous-earth-de-on-bacillus-aquimaris" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32350.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">284</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">4601</span> Inventive Synthesis and Characterization of a Cesium Molybdate Compound: CsBi(MoO4)2</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G%C3%BCl%C5%9Fah%20%C3%87elik%20G%C3%BCl">Gülşah Çelik Gül</a>, <a href="https://publications.waset.org/abstracts/search?q=Figen%20Kurtulu%C5%9F"> Figen Kurtuluş</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cesium molybdates with general formula CsMIII(MoO4)2, where MIII = Bi, Dy, Pr, Er, exhibit rich polymorphism, and crystallize in a layered structure. These properties cause intensive studies on cesium molybdates. CsBi(MoO4)2 was synthesized by microwave method by using cerium sulphate, bismuth oxide and molybdenum (VI) oxide in an appropriate molar ratio. Characterizations were done by x-ray diffraction (XRD), fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy/energy dispersive analyze (SEM/EDS), thermo gravimetric/differantial thermal analysis (TG/DTA). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cesium%20bismuth%20dimolybdate" title="cesium bismuth dimolybdate">cesium bismuth dimolybdate</a>, <a href="https://publications.waset.org/abstracts/search?q=microwave%20synthesis" title=" microwave synthesis"> microwave synthesis</a>, <a href="https://publications.waset.org/abstracts/search?q=powder%20x-ray%20diffraction" title=" powder x-ray diffraction"> powder x-ray diffraction</a>, <a href="https://publications.waset.org/abstracts/search?q=rare%20earth%20dimolybdates" title=" rare earth dimolybdates"> rare earth dimolybdates</a> </p> <a href="https://publications.waset.org/abstracts/27059/inventive-synthesis-and-characterization-of-a-cesium-molybdate-compound-csbimoo42" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27059.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">518</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">4600</span> Optical and Structural Characterization of Rare Earth Doped Phosphate Glasses</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Z%C3%A9lia%20Maria%20Da%20Costa%20Ludwig">Zélia Maria Da Costa Ludwig</a>, <a href="https://publications.waset.org/abstracts/search?q=Maria%20Jos%C3%A9%20Valenzuela%20Bell"> Maria José Valenzuela Bell</a>, <a href="https://publications.waset.org/abstracts/search?q=Geraldo%20Henriques%20Da%20Silva"> Geraldo Henriques Da Silva</a>, <a href="https://publications.waset.org/abstracts/search?q=Thales%20Alves%20Faraco"> Thales Alves Faraco</a>, <a href="https://publications.waset.org/abstracts/search?q=Victor%20Rocha%20Da%20Silva"> Victor Rocha Da Silva</a>, <a href="https://publications.waset.org/abstracts/search?q=Daniel%20Rotmeister%20Teixeira"> Daniel Rotmeister Teixeira</a>, <a href="https://publications.waset.org/abstracts/search?q=V%C3%ADrgilio%20De%20Carvalho%20Dos%20Anjos"> Vírgilio De Carvalho Dos Anjos</a>, <a href="https://publications.waset.org/abstracts/search?q=Valdemir%20Ludwig"> Valdemir Ludwig</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Advances in telecommunications grow with the development of optical amplifiers based on rare earth ions. The focus has been concentrated in silicate glasses although their amplified spontaneous emission is limited to a few tens of nanometers (~ 40nm). Recently, phosphate glasses have received great attention due to their potential application in optical data transmission, detection, sensors and laser detector, waveguide and optical fibers, besides its excellent physical properties such as high thermal expansion coefficients and low melting temperature. Compared with the silica glasses, phosphate glasses provide different optical properties such as, large transmission window of infrared, and good density. Research on the improvement of physical and chemical durability of phosphate glass by addition of heavy metals oxides in P2O5 has been performed. The addition of Na2O further improves the solubility of rare earths, while increasing the Al2O3 links in the P2O5 tetrahedral results in increased durability and aqueous transition temperature and a decrease of the coefficient of thermal expansion. This work describes the structural and spectroscopic characterization of a phosphate glass matrix doped with different Er (Erbium) concentrations. The phosphate glasses containing Er3+ ions have been prepared by melt technique. A study of the optical absorption, luminescence and lifetime was conducted in order to characterize the infrared emission of Er3+ ions at 1540 nm, due to the radiative transition 4I13/2 → 4I15/2. Our results indicate that the present glass is a quite good matrix for Er3+ ions, and the quantum efficiency of the 1540 nm emission was high. A quenching mechanism for the mentioned luminescence was not observed up to 2,0 mol% of Er concentration. The Judd-Ofelt parameters, radiative lifetime and quantum efficiency have been determined in order to evaluate the potential of Er3+ ions in new phosphate glass. The parameters follow the trend as Ω2 > Ω4 > Ω6. It is well known that the parameter Ω2 is an indication of the dominant covalent nature and/or structural changes in the vicinity of the ion (short range effects), while Ω4 and Ω6 intensity parameters are long range parameters that can be related to the bulk properties such as viscosity and rigidity of the glass. From the PL measurements, no red or green upconversion was measured when pumping the samples with laser excitation at 980 nm. As future prospects: Synthesize this glass system with silver in order to determine the influence of silver nanoparticles on the Er3+ ions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=phosphate%20glass" title="phosphate glass">phosphate glass</a>, <a href="https://publications.waset.org/abstracts/search?q=erbium" title=" erbium"> erbium</a>, <a href="https://publications.waset.org/abstracts/search?q=luminescence" title=" luminescence"> luminescence</a>, <a href="https://publications.waset.org/abstracts/search?q=glass%20system" title=" glass system"> glass system</a> </p> <a href="https://publications.waset.org/abstracts/27070/optical-and-structural-characterization-of-rare-earth-doped-phosphate-glasses" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27070.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">510</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">4599</span> Research on Traditional Rammed Earth Houses in Southern Zhejiang, China: Based on the perspective of "Geographical Embeddedness"</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Han%20Wu">Han Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Jie%20Wang"> Jie Wang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Zhejiang’s special geographical environment has created characteristic mountain dwellings with climate adaptability. Among them, the terrain of southern Zhejiang is dominated by mountainous and hilly landforms, and its traditional dwellings have distinctive characteristics. They are often adapted to local conditions and laid out in accordance with the mountains. In order to block the severe winter weather conditions, local traditional building materials such as rammed earth are mostly used. However, with the development of urbanization, traditional villages have undergone large-scale changes, gradually losing their original uniqueness. In order to solve this problem, this paper takes traditional villages around Baishanzu National Park in Zhejiang as an example and selects nine typical villages in Jingning County and Longquan, respectively. Based on field investigations, extracting the environmental adaptability of local traditional rammed earth houses from the perspective of “geographical embeddedness”. And then combined with case analysis, discussing the translation and development of its traditional architectural methods in contemporary rammed earth buildings in southern Zhejiang. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=geographical%20embeddedness" title="geographical embeddedness ">geographical embeddedness </a>, <a href="https://publications.waset.org/abstracts/search?q=lighting" title="lighting">lighting</a>, <a href="https://publications.waset.org/abstracts/search?q=modernization%20translation" title=" modernization translation"> modernization translation</a>, <a href="https://publications.waset.org/abstracts/search?q=rammed%20earth%20building" title=" rammed earth building"> rammed earth building</a>, <a href="https://publications.waset.org/abstracts/search?q=ventilation" title=" ventilation"> ventilation</a> </p> <a href="https://publications.waset.org/abstracts/151308/research-on-traditional-rammed-earth-houses-in-southern-zhejiang-china-based-on-the-perspective-of-geographical-embeddedness" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151308.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">108</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">4598</span> Flowback Fluids Treatment Technology with Water Recycling and Valuable Metals Recovery</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Monika%20Konieczy%C5%84ska">Monika Konieczyńska</a>, <a href="https://publications.waset.org/abstracts/search?q=Joanna%20Fajfer"> Joanna Fajfer</a>, <a href="https://publications.waset.org/abstracts/search?q=Olga%20Lipi%C5%84ska"> Olga Lipińska</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In Poland works related to the exploration and prospection of unconventional hydrocarbons (natural gas accumulated in the Silurian shale formations) started in 2007, based on the experience of the other countries that have created new possibilities for the use of existing hydrocarbons resources. The highly water-consuming process of hydraulic fracturing is required for the exploitation of shale gas which implies a need to ensure large volume of water available. As a result considerable amount of mining waste is generated, particularly liquid waste, i.e. flowback fluid with variable chemical composition. The chemical composition of the flowback fluid depends on the composition of the fracturing fluid and the chemistry of the fractured geological formations. Typically, flowback fluid is highly salinated, can be enriched in heavy metals, including rare earth elements, naturally occurring radioactive materials and organic compounds. The generated fluids considered as the extractive waste should be properly managed in the recovery or disposal facility. Problematic issue is both high hydration of waste as well as their variable chemical composition. Also the limited capacity of currently operating facilities is a growing problem. Based on the estimates, currently operating facilities will not be sufficient for the need of waste disposal when extraction of unconventional hydrocarbons starts. Further more, the content of metals in flowback fluids including rare earth elements is a considerable incentive to develop technology of metals recovery. Also recycling is a key factor in terms of selection of treatment process, which should provide that the thresholds required for reuse are met. The paper will present the study of the flowback fluids chemical composition, based on samples from hydraulic fracturing processes performed in Poland. The scheme of flowback fluid cleaning and recovering technology will be reviewed along with a discussion of the results and an assessment of environmental impact, including all generated by-products. The presented technology is innovative due to the metal recovery, as well as purified water supply for hydraulic fracturing process, which is significant contribution to reducing water consumption. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=environmental%20impact" title="environmental impact">environmental impact</a>, <a href="https://publications.waset.org/abstracts/search?q=flowback%20fluid" title=" flowback fluid"> flowback fluid</a>, <a href="https://publications.waset.org/abstracts/search?q=management%20of%20special%20waste%20streams" title=" management of special waste streams"> management of special waste streams</a>, <a href="https://publications.waset.org/abstracts/search?q=metals%20recovery" title=" metals recovery"> metals recovery</a>, <a href="https://publications.waset.org/abstracts/search?q=shale%20gas" title=" shale gas"> shale gas</a> </p> <a href="https://publications.waset.org/abstracts/44605/flowback-fluids-treatment-technology-with-water-recycling-and-valuable-metals-recovery" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44605.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">261</span> </span> </div> </div> <ul class="pagination"> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=rare%20earth%20element&page=3" rel="prev">&lsaquo;</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=rare%20earth%20element&page=1">1</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=rare%20earth%20element&page=2">2</a></li> <li class="page-item"><a class="page-link" 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