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photonic crystal</title> <meta name="description" content="Search results for: magnetic photonic crystal"> <meta name="keywords" content="magnetic photonic crystal"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="magnetic photonic crystal"> <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> 2044</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: magnetic photonic crystal</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1054</span> Evaluation of Cytotoxic Effect of Mitoxantrone Conjugated Magnetite Nanoparticles and Graphene Oxide-Magnetite Nanocomposites on Mesenchymal Stem Cells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abbas%20Jafarizad">Abbas Jafarizad</a>, <a href="https://publications.waset.org/abstracts/search?q=Duygu%20Ekinci"> Duygu Ekinci</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work targeted drug delivery is proposed to decrease adverse effect of drugs with concomitant reduces in consumption and treatment outgoings. Nanoparticles (NPs) can be prepared from a variety of materials such as lipid, biodegradable polymer that prevent the drugs cytotoxicity in healthy cells, etc. One of the most important drugs used in chemotherapy is mitoxantrone (MTX) which prevents cell proliferation by inhibition of topoisomerase II and DNA repair; however, it is not selective and has some serious side effects. In this study, mentioned aim is achieved by using several nanocarriers like magnetite (Fe3O4) and their composites with magnetic graphene oxide (Fe3O4@GO). Also, cytotoxic potential of Fe3O4, Fe3O4-MTX, and Fe3O4@GO-MTX nanocomposite were evaluated on mesenchymal stem cells (MSCs). In this study, we reported the synthesis of monodisperse Fe3O4 NPs and Fe3O4@GO nanocomposite and their structures were investigated by using field emission scanning electron microscope (FESEM), Fourier transform infrared (FTIR) spectra, atomic force microscopy (AFM), Brauneur Emmet Teller (BET) isotherm and contact angle studies. Moreover, we used 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay to evaluate cytotoxic effects of MTX, Fe3O4 NPs, Fe3O4-MTX and Fe3O4@GO-MTX nanocomposite on MSCs. The in-vitro MTT results indicated that all concentrations of MTX and Fe3O4@GO-MTX nanocomposites showed cytotoxic effects while all concentrations of Fe3O4 NPs and Fe3O4-MTX NPs did not show any cytotoxic effect on stem cells. The results from this study indicated that using Fe3O4 NPs as anticancer drug delivery systems could be a trustworthy method for cancer treatment. But for reaching excellent and accurate results, further investigation is necessary. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mitoxantrone" title="mitoxantrone">mitoxantrone</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetite" title=" magnetite"> magnetite</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20graphene%20oxide" title=" magnetic graphene oxide"> magnetic graphene oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=MTT%20assay" title=" MTT assay"> MTT assay</a>, <a href="https://publications.waset.org/abstracts/search?q=mesenchymal%20stem%20cells" title=" mesenchymal stem cells"> mesenchymal stem cells</a> </p> <a href="https://publications.waset.org/abstracts/66115/evaluation-of-cytotoxic-effect-of-mitoxantrone-conjugated-magnetite-nanoparticles-and-graphene-oxide-magnetite-nanocomposites-on-mesenchymal-stem-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66115.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">272</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">1053</span> Towards the Integration of a Micro Pump in μTAS </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Y.%20Haik">Y. Haik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study is to present a micro mechanical pump that was fabricated using SwIFT™ microfabrication surface micromachining process and to demonstrate the feasibility of integrating such micro pump into a micro analysis system. The micropump circulates the bio-sample and magnetic nanoparticles through different compartments to separate and purify the targeted bio-sample. This article reports the flow characteristics in the microchannels and in a crescent micro pump. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=crescent%20micropumps" title="crescent micropumps">crescent micropumps</a>, <a href="https://publications.waset.org/abstracts/search?q=microanalysis" title=" microanalysis"> microanalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoparticles" title=" nanoparticles"> nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=MEMS" title=" MEMS"> MEMS</a> </p> <a href="https://publications.waset.org/abstracts/85432/towards-the-integration-of-a-micro-pump-in-mtas" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/85432.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">215</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1052</span> Proposed Design of an Optimized Transient Cavity Picosecond Ultraviolet Laser</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marilou%20Cadatal-Raduban">Marilou Cadatal-Raduban</a>, <a href="https://publications.waset.org/abstracts/search?q=Minh%20Hong%20Pham"> Minh Hong Pham</a>, <a href="https://publications.waset.org/abstracts/search?q=Duong%20Van%20Pham"> Duong Van Pham</a>, <a href="https://publications.waset.org/abstracts/search?q=Tu%20Nguyen%20Xuan"> Tu Nguyen Xuan</a>, <a href="https://publications.waset.org/abstracts/search?q=Mui%20Viet%20Luong"> Mui Viet Luong</a>, <a href="https://publications.waset.org/abstracts/search?q=Kohei%20Yamanoi"> Kohei Yamanoi</a>, <a href="https://publications.waset.org/abstracts/search?q=Toshihiko%20Shimizu"> Toshihiko Shimizu</a>, <a href="https://publications.waset.org/abstracts/search?q=Nobuhiko%20Sarukura"> Nobuhiko Sarukura</a>, <a href="https://publications.waset.org/abstracts/search?q=Hung%20Dai%20Nguyen"> Hung Dai Nguyen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> There is a great deal of interest in developing all-solid-state tunable ultrashort pulsed lasers emitting in the ultraviolet (UV) region for applications such as micromachining, investigation of charge carrier relaxation in conductors, and probing of ultrafast chemical processes. However, direct short-pulse generation is not as straight forward in solid-state gain media as it is for near-IR tunable solid-state lasers such as Ti:sapphire due to the difficulty of obtaining continuous wave laser operation, which is required for Kerr lens mode-locking schemes utilizing spatial or temporal Kerr type nonlinearity. In this work, the transient cavity method, which was reported to generate ultrashort laser pulses in dye lasers, is extended to a solid-state gain medium. Ce:LiCAF was chosen among the rare-earth-doped fluoride laser crystals emitting in the UV region because of its broad tunability (from 280 to 325 nm) and enough bandwidth to generate 3-fs pulses, sufficiently large effective gain cross section (6.0 x10⁻¹⁸ cm²) favorable for oscillators, and a high saturation fluence (115 mJ/cm²). Numerical simulations are performed to investigate the spectro-temporal evolution of the broadband UV laser emission from Ce:LiCAF, represented as a system of two homogeneous broadened singlet states, by solving the rate equations extended to multiple wavelengths. The goal is to find the appropriate cavity length and Q-factor to achieve the optimal photon cavity decay time and pumping energy for resonator transients that will lead to ps UV laser emission from a Ce:LiCAF crystal pumped by the fourth harmonics (266nm) of a Nd:YAG laser. Results show that a single ps pulse can be generated from a 1-mm, 1 mol% Ce³⁺-doped LiCAF crystal using an output coupler with 10% reflectivity (low-Q) and an oscillator cavity that is 2-mm long (short cavity). This technique can be extended to other fluoride-based solid-state laser gain media. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rare-earth-doped%20fluoride%20gain%20medium" title="rare-earth-doped fluoride gain medium">rare-earth-doped fluoride gain medium</a>, <a href="https://publications.waset.org/abstracts/search?q=transient%20cavity" title=" transient cavity"> transient cavity</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrashort%20laser" title=" ultrashort laser"> ultrashort laser</a>, <a href="https://publications.waset.org/abstracts/search?q=ultraviolet%20laser" title=" ultraviolet laser"> ultraviolet laser</a> </p> <a href="https://publications.waset.org/abstracts/71437/proposed-design-of-an-optimized-transient-cavity-picosecond-ultraviolet-laser" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71437.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">357</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">1051</span> Defect Modes in Multilayered Piezoelectric Structures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=D.%20G.%20Piliposyan">D. G. Piliposyan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Propagation of electro-elastic waves in a piezoelectric waveguide with finite stacks and a defect layer is studied using a modified transfer matrix method. The dispersion equation for a periodic structure consisting of unit cells made up from two piezoelectric materials with metallized interfaces is obtained. An analytical expression, for the transmission coefficient for a waveguide with finite stacks and a defect layer, that is found can be used to accurately detect and control the position of the passband within a stopband. The result can be instrumental in constructing a tunable waveguide made of layers of different or identical piezoelectric crystals and separated by metallized interfaces. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=piezoelectric%20layered%20structure" title="piezoelectric layered structure">piezoelectric layered structure</a>, <a href="https://publications.waset.org/abstracts/search?q=periodic%20phononic%20crystal" title=" periodic phononic crystal"> periodic phononic crystal</a>, <a href="https://publications.waset.org/abstracts/search?q=bandgap" title=" bandgap"> bandgap</a>, <a href="https://publications.waset.org/abstracts/search?q=bloch%20waves" title=" bloch waves"> bloch waves</a> </p> <a href="https://publications.waset.org/abstracts/55400/defect-modes-in-multilayered-piezoelectric-structures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55400.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">224</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">1050</span> Cognitive Effects of Repetitive Transcranial Magnetic Stimulation in Patients with Parkinson's Disease</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ana%20Munguia">Ana Munguia</a>, <a href="https://publications.waset.org/abstracts/search?q=Gerardo%20Ortiz"> Gerardo Ortiz</a>, <a href="https://publications.waset.org/abstracts/search?q=Guadalupe%20Gonzalez"> Guadalupe Gonzalez</a>, <a href="https://publications.waset.org/abstracts/search?q=Fiacro%20Jimenez"> Fiacro Jimenez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Parkinson's disease (PD) is a neurodegenerative disorder that causes motor and cognitive symptoms. The first-choice treatment for these patients is pharmacological, but this generates several side effects. Because of that new treatments were introduced such as Repetitive Transcranial Magnetic Stimulation (rTMS) in order to improve the life quality of the patients. Several studies suggest significant changes in motor symptoms. However, there is a great diversity in the number of pulses, amplitude, frequency and stimulation targets, which results in inconsistent data. In addition, these studies do not have an analysis of the neuropsychological effects of the treatment. The main purpose of this study is to evaluate the impact of rTMS on the cognitive performance of 6 patients with H&Y III and IV (45-65 years, 3 men and 3 women). An initial neuropsychological and neurological evaluation was performed. Patients were randomized into two groups; in the first phase one received rTMS in the supplementary motor area, the other group in the dorsolateral prefrontal cortex contralateral to the most affected hemibody. In the second phase, each group received the stimulation in the area that he had not been stimulated previously. Reassessments were carried out at the beginning, at the end of each phase and a follow-up was carried out 6 months after the conclusion of the stimulation. In these preliminary results, it is reported that there's no statistically significant difference before and after receiving rTMS in the neuropsychological test scores of the patients, which suggests that the cognitive performance of patients is not detrimental. There are even tendencies towards an improvement in executive functioning after the treatment. What added to motor improvement, showed positive effects in the activities of the patients' daily life. In a later and more detailed analysis, will be evaluated the effects in each of the patients separately in relation to the functionality of the patients in their daily lives. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Parkinson%27s%20disease" title="Parkinson's disease">Parkinson's disease</a>, <a href="https://publications.waset.org/abstracts/search?q=rTMS" title=" rTMS"> rTMS</a>, <a href="https://publications.waset.org/abstracts/search?q=cognitive" title=" cognitive"> cognitive</a>, <a href="https://publications.waset.org/abstracts/search?q=treatment" title=" treatment"> treatment</a> </p> <a href="https://publications.waset.org/abstracts/84791/cognitive-effects-of-repetitive-transcranial-magnetic-stimulation-in-patients-with-parkinsons-disease" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84791.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">145</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">1049</span> Optimized Electron Diffraction Detection and Data Acquisition in Diffraction Tomography: A Complete Solution by Gatan</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saleh%20Gorji">Saleh Gorji</a>, <a href="https://publications.waset.org/abstracts/search?q=Sahil%20Gulati"> Sahil Gulati</a>, <a href="https://publications.waset.org/abstracts/search?q=Ana%20Pakzad"> Ana Pakzad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Continuous electron diffraction tomography, also known as microcrystal electron diffraction (MicroED) or three-dimensional electron diffraction (3DED), is a powerful technique, which in combination with cryo-electron microscopy (cryo-ED), can provide atomic-scale 3D information about the crystal structure and composition of different classes of crystalline materials such as proteins, peptides, and small molecules. Unlike the well-established X-ray crystallography method, 3DED does not require large single crystals and can collect accurate electron diffraction data from crystals as small as 50 – 100 nm. This is a critical advantage as growing larger crystals, as required by X-ray crystallography methods, is often very difficult, time-consuming, and expensive. In most cases, specimens studied via 3DED method are electron beam sensitive, which means there is a limitation on the maximum amount of electron dose one can use to collect the required data for a high-resolution structure determination. Therefore, collecting data using a conventional scintillator-based fiber coupled camera brings additional challenges. This is because of the inherent noise introduced during the electron-to-photon conversion in the scintillator and transfer of light via the fibers to the sensor, which results in a poor signal-to-noise ratio and requires a relatively higher and commonly specimen-damaging electron dose rates, especially for protein crystals. As in other cryo-EM techniques, damage to the specimen can be mitigated if a direct detection camera is used which provides a high signal-to-noise ratio at low electron doses. In this work, we have used two classes of such detectors from Gatan, namely the K3® camera (a monolithic active pixel sensor) and Stela™ (that utilizes DECTRIS hybrid-pixel technology), to address this problem. The K3 is an electron counting detector optimized for low-dose applications (like structural biology cryo-EM), and Stela is also a counting electron detector but optimized for diffraction applications with high speed and high dynamic range. Lastly, data collection workflows, including crystal screening, microscope optics setup (for imaging and diffraction), stage height adjustment at each crystal position, and tomogram acquisition, can be one of the other challenges of the 3DED technique. Traditionally this has been all done manually or in a partly automated fashion using open-source software and scripting, requiring long hours on the microscope (extra cost) and extensive user interaction with the system. We have recently introduced Latitude® D in DigitalMicrograph® software, which is compatible with all pre- and post-energy-filter Gatan cameras and enables 3DED data acquisition in an automated and optimized fashion. Higher quality 3DED data enables structure determination with higher confidence, while automated workflows allow these to be completed considerably faster than before. Using multiple examples, this work will demonstrate how to direct detection electron counting cameras enhance 3DED results (3 to better than 1 Angstrom) for protein and small molecule structure determination. We will also show how Latitude D software facilitates collecting such data in an integrated and fully automated user interface. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=continuous%20electron%20diffraction%20tomography" title="continuous electron diffraction tomography">continuous electron diffraction tomography</a>, <a href="https://publications.waset.org/abstracts/search?q=direct%20detection" title=" direct detection"> direct detection</a>, <a href="https://publications.waset.org/abstracts/search?q=diffraction" title=" diffraction"> diffraction</a>, <a href="https://publications.waset.org/abstracts/search?q=Latitude%20D" title=" Latitude D"> Latitude D</a>, <a href="https://publications.waset.org/abstracts/search?q=Digitalmicrograph" title=" Digitalmicrograph"> Digitalmicrograph</a>, <a href="https://publications.waset.org/abstracts/search?q=proteins" title=" proteins"> proteins</a>, <a href="https://publications.waset.org/abstracts/search?q=small%20molecules" title=" small molecules"> small molecules</a> </p> <a href="https://publications.waset.org/abstracts/162483/optimized-electron-diffraction-detection-and-data-acquisition-in-diffraction-tomography-a-complete-solution-by-gatan" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162483.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">107</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">1048</span> Full-Spectrum Photo-thermal Conversion of Point-mode Cu₂O/TiN Plasmonic Nanofluids</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Xiaoxiao%20Yu">Xiaoxiao Yu</a>, <a href="https://publications.waset.org/abstracts/search?q=Guodu%20He"> Guodu He</a>, <a href="https://publications.waset.org/abstracts/search?q=Zihua%20Wu"> Zihua Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Yuanyuan%20Wang"> Yuanyuan Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Huaqing%20Xie"> Huaqing Xie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Core-shell composite structure is a common method to regulate the spectral absorption of nanofluids, but there occur complex preparation processes, which limit the applications in some fields, such as photothermal utilization and catalysis. This work proposed point-mode Cu₂O/TiN plasmonic nanofluids to regulate the spectral capturing ability and simplify the preparation process. Non-noble TiN nanoparticles with the localized surface plasmon resonance effect are dispersed in Cu₂O nanoparticles for forming a multi-point resonance source to enhance the spectral absorption performance. The experimental results indicate that the multiple resonance effect of TiN effectively improves the optical absorption and expands the absorption region. When the radius of Cu₂O nanoparticles is equal to 150nm, the optical absorption of point-mode Cu₂O/TiN plasmonic nanoparticles is best. Moreover, the photothermal conversion efficiency of Cu₂O/TiN plasmonic nanofluid can reach 97.5% at a volume fraction of 0.015% and an optical depth of 10mm. The point-mode nanostructure effectively enhances the optical absorption properties and greatly simplifies the preparation process of the composite nanoparticles, which can promote the application of multi-component photonic nanoparticles in the field of solar energy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=solar%20energy" title="solar energy">solar energy</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofluid" title=" nanofluid"> nanofluid</a>, <a href="https://publications.waset.org/abstracts/search?q=point-mode%20structure" title=" point-mode structure"> point-mode structure</a>, <a href="https://publications.waset.org/abstracts/search?q=Cu%E2%82%82O%2FTiN" title=" Cu₂O/TiN"> Cu₂O/TiN</a>, <a href="https://publications.waset.org/abstracts/search?q=localized%20surface%20plasmon%20resonance%20effect" title=" localized surface plasmon resonance effect"> localized surface plasmon resonance effect</a> </p> <a href="https://publications.waset.org/abstracts/177661/full-spectrum-photo-thermal-conversion-of-point-mode-cu2otin-plasmonic-nanofluids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/177661.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">61</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">1047</span> Mineralized Nanoparticles as a Contrast Agent for Ultrasound and Magnetic Resonance Imaging</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jae%20Won%20Lee">Jae Won Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Kyung%20Hyun%20Min"> Kyung Hyun Min</a>, <a href="https://publications.waset.org/abstracts/search?q=Hong%20Jae%20Lee"> Hong Jae Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Sang%20Cheon%20Lee"> Sang Cheon Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> To date, imaging techniques have attracted much attention in medicine because the detection of diseases at an early stage provides greater opportunities for successful treatment. Consequently, over the past few decades, diverse imaging modalities including magnetic resonance (MR), positron emission tomography, computed tomography, and ultrasound (US) have been developed and applied widely in the field of clinical diagnosis. However, each of the above-mentioned imaging modalities possesses unique strengths and intrinsic weaknesses, which limit their abilities to provide accurate information. Therefore, multimodal imaging systems may be a solution that can provide improved diagnostic performance. Among the current medical imaging modalities, US is a widely available real-time imaging modality. It has many advantages including safety, low cost and easy access for patients. However, its low spatial resolution precludes accurate discrimination of diseased region such as cancer sites. In contrast, MR has no tissue-penetrating limit and can provide images possessing exquisite soft tissue contrast and high spatial resolution. However, it cannot offer real-time images and needs a comparatively long imaging time. The characteristics of these imaging modalities may be considered complementary, and the modalities have been frequently combined for the clinical diagnostic process. Biominerals such as calcium carbonate (CaCO3) and calcium phosphate (CaP) exhibit pH-dependent dissolution behavior. They demonstrate pH-controlled drug release due to the dissolution of minerals in acidic pH conditions. In particular, the application of this mineralization technique to a US contrast agent has been reported recently. The CaCO3 mineral reacts with acids and decomposes to generate calcium dioxide (CO2) gas in an acidic environment. These gas-generating mineralized nanoparticles generated CO2 bubbles in the acidic environment of the tumor, thereby allowing for strong echogenic US imaging of tumor tissues. On the basis of this previous work, it was hypothesized that the loading of MR contrast agents into the CaCO3 mineralized nanoparticles may be a novel strategy in designing a contrast agent for dual imaging. Herein, CaCO3 mineralized nanoparticles that were capable of generating CO2 bubbles to trigger the release of entrapped MR contrast agents in response to tumoral acidic pH were developed for the purposes of US and MR dual-modality imaging of tumors. Gd2O3 nanoparticles were selected as an MR contrast agent. A key strategy employed in this study was to prepare Gd2O3 nanoparticle-loaded mineralized nanoparticles (Gd2O3-MNPs) using block copolymer-templated CaCO3 mineralization in the presence of calcium cations (Ca2+), carbonate anions (CO32-) and positively charged Gd2O3 nanoparticles. The CaCO3 core was considered suitable because it may effectively shield Gd2O3 nanoparticles from water molecules in the blood (pH 7.4) before decomposing to generate CO2 gas, triggering the release of Gd2O3 nanoparticles in tumor tissues (pH 6.4~7.4). The kinetics of CaCO3 dissolution and CO2 generation from the Gd2O3-MNPs were examined as a function of pH and pH-dependent in vitro magnetic relaxation; additionally, the echogenic properties were estimated to demonstrate the potential of the particles for the tumor-specific US and MR imaging. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=calcium%20carbonate" title="calcium carbonate">calcium carbonate</a>, <a href="https://publications.waset.org/abstracts/search?q=mineralization" title=" mineralization"> mineralization</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound%20imaging" title=" ultrasound imaging"> ultrasound imaging</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20resonance%20imaging" title=" magnetic resonance imaging"> magnetic resonance imaging</a> </p> <a href="https://publications.waset.org/abstracts/45843/mineralized-nanoparticles-as-a-contrast-agent-for-ultrasound-and-magnetic-resonance-imaging" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45843.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">236</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">1046</span> Ultra-Sensitive and Real Time Detection of ZnO NW Using QCM</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Juneseok%20You">Juneseok You</a>, <a href="https://publications.waset.org/abstracts/search?q=Kuewhan%20Jang"> Kuewhan Jang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chanho%20Park"> Chanho Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Jaeyeong%20Choi"> Jaeyeong Choi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyunjun%20Park"> Hyunjun Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Sehyun%20Shin"> Sehyun Shin</a>, <a href="https://publications.waset.org/abstracts/search?q=Changsoo%20Han"> Changsoo Han</a>, <a href="https://publications.waset.org/abstracts/search?q=Sungsoo%20Na"> Sungsoo Na</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nanomaterials occur toxic effects to human being or ecological systems. Some sensors have been developed to detect toxic materials and the standard for toxic materials has been established. Zinc oxide nanowire (ZnO NW) is known for toxic material. By ionizing in cell body, ionized Zn ions are overexposed to cell components, which cause critical damage or death. In this paper, we detected ZnO NW in water using QCM (Quartz Crystal Microbalance) and ssDNA (single strand DNA). We achieved 30 minutes of response time for real time detection and 100 pg/mL of limit of detection (LOD). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=zinc%20oxide%20nanowire" title="zinc oxide nanowire">zinc oxide nanowire</a>, <a href="https://publications.waset.org/abstracts/search?q=QCM" title=" QCM"> QCM</a>, <a href="https://publications.waset.org/abstracts/search?q=ssDNA" title=" ssDNA"> ssDNA</a>, <a href="https://publications.waset.org/abstracts/search?q=toxic%20material" title=" toxic material"> toxic material</a>, <a href="https://publications.waset.org/abstracts/search?q=biosensor" title=" biosensor"> biosensor</a> </p> <a href="https://publications.waset.org/abstracts/43680/ultra-sensitive-and-real-time-detection-of-zno-nw-using-qcm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43680.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">428</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">1045</span> Magnetoresistance Transition from Negative to Positive in Functionalization of Carbon Nanotube and Composite with Polyaniline</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Krishna%20Prasad%20Maity">Krishna Prasad Maity</a>, <a href="https://publications.waset.org/abstracts/search?q=Narendra%20Tanty"> Narendra Tanty</a>, <a href="https://publications.waset.org/abstracts/search?q=Ananya%20Patra"> Ananya Patra</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Prasad"> V. Prasad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Carbon nanotube (CNT) is a well-known material for very good electrical, thermal conductivity and high tensile strength. Because of that, it’s widely used in many fields like nanotechnology, electronics, optics, etc. In last two decades, polyaniline (PANI) with CNT and functionalized CNT (fCNT) have been promising materials in application of gas sensing, electromagnetic shielding, electrode of capacitor etc. So, the study of electrical conductivity of PANI/CNT and PANI/fCNT is important to understand the charge transport and interaction between PANI and CNT in the composite. It is observed that a transition in magnetoresistance (MR) with lowering temperature, increasing magnetic field and decreasing CNT percentage in CNT/PANI composite. Functionalization of CNT prevent the nanotube aggregation, improves interfacial interaction, dispersion and stabilized in polymer matrix. However, it shortens the length, breaks C-C sp² bonds and enhances the disorder creating defects on the side walls. We have studied electrical resistivity and MR in PANI with CNT and fCNT composites for different weight percentages down to the temperature 4.2K and up to magnetic field 5T. Resistivity increases significantly in composite at low temperature due to functionalization of CNT compared to only CNT. Interestingly a transition from negative to positive magnetoresistance has been observed when the filler is changed from pure CNT to functionalized CNT after a certain percentage (10wt%) as the effect of more disorder in fCNT/PANI composite. The transition of MR has been explained on the basis of polaron-bipolaron model. The long-range Coulomb interaction between two polarons screened by disorder in the composite of fCNT/PANI, increases the effective on-site Coulomb repulsion energy to form bipolaron which leads to change the sign of MR from negative to positive. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coulomb%20interaction" title="coulomb interaction">coulomb interaction</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetoresistance%20transition" title=" magnetoresistance transition"> magnetoresistance transition</a>, <a href="https://publications.waset.org/abstracts/search?q=polyaniline%20composite" title=" polyaniline composite"> polyaniline composite</a>, <a href="https://publications.waset.org/abstracts/search?q=polaron-bipolaron" title=" polaron-bipolaron"> polaron-bipolaron</a> </p> <a href="https://publications.waset.org/abstracts/98940/magnetoresistance-transition-from-negative-to-positive-in-functionalization-of-carbon-nanotube-and-composite-with-polyaniline" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98940.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">172</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">1044</span> Cost-Effective Soft Lithography of Organic Semiconductors in Organic Field-Effect Transistors (OFETs)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tae%20Kyu%20An">Tae Kyu An</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We demonstrate repurposing linear micropatterns on the CD as a master mold to fabricate TIPS-PEN microwires. From the micropatterns on CDs, we replicated polyurethane acrylate (PUA) templates which are robust and flexible until submicrometer scale patterns. Subsequently, 1.5 μm TIPS-PEN microwires separated by 1.5 μm were grown. Using crystal analysis tools with polarized optical microscopy and X-ray diffraction measurement, it was revealed that each TIPS-PEN microwires are highly crystalline and uniform compared to spin-coated films. It is attributed to the template-guided growth of TIPS-PEN crystals along the linear template, thus the OFETs comprised of TIPS-PEN microwires displayed the high field-effect mobility. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=compact%20disk" title="compact disk">compact disk</a>, <a href="https://publications.waset.org/abstracts/search?q=macro%20patterning" title=" macro patterning"> macro patterning</a>, <a href="https://publications.waset.org/abstracts/search?q=OFET" title=" OFET"> OFET</a>, <a href="https://publications.waset.org/abstracts/search?q=soft%20lithography" title=" soft lithography"> soft lithography</a> </p> <a href="https://publications.waset.org/abstracts/57069/cost-effective-soft-lithography-of-organic-semiconductors-in-organic-field-effect-transistors-ofets" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57069.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">239</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1043</span> Software Development for Both Small Wind Performance Optimization and Structural Compliance Analysis with International Safety Regulations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20M.%20Yoo">K. M. Yoo</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20H.%20Kang"> M. H. Kang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Conventional commercial wind turbine design software is limited to large wind turbines due to not incorporating with low Reynold’s Number aerodynamic characteristics typically for small wind turbines. To extract maximum annual energy product from an intermediately designed small wind turbine associated with measured wind data, numerous simulation is highly recommended to have a best fitting planform design with proper airfoil configuration. Since depending upon wind distribution with average wind speed, an optimal wind turbine planform design changes accordingly. It is theoretically not difficult, though, it is very inconveniently time-consuming design procedure to finalize conceptual layout of a desired small wind turbine. Thus, to help simulations easier and faster, a GUI software is developed to conveniently iterate and change airfoil types, wind data, and geometric blade data as well. With magnetic generator torque curve, peak power tracking simulation is also available to better match with the magnetic generator. Small wind turbine often lacks starting torque due to blade optimization. Thus this simulation is also embedded along with yaw design. This software provides various blade cross section details at user’s design convenience such as skin thickness control with fiber direction option, spar shape, and their material properties. Since small wind turbine is under international safety regulations with fatigue damage during normal operations and safety load analyses with ultimate excessive loads, load analyses are provided with each category mandated in the safety regulations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=GUI%20software" title="GUI software">GUI software</a>, <a href="https://publications.waset.org/abstracts/search?q=Low%20Reynold%E2%80%99s%20number%20aerodynamics" title=" Low Reynold’s number aerodynamics"> Low Reynold’s number aerodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20power%20tracking" title=" peak power tracking"> peak power tracking</a>, <a href="https://publications.waset.org/abstracts/search?q=safety%20regulations" title=" safety regulations"> safety regulations</a>, <a href="https://publications.waset.org/abstracts/search?q=wind%20turbine%20performance%20optimization" title=" wind turbine performance optimization"> wind turbine performance optimization</a> </p> <a href="https://publications.waset.org/abstracts/64036/software-development-for-both-small-wind-performance-optimization-and-structural-compliance-analysis-with-international-safety-regulations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/64036.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">304</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">1042</span> Immobilization of Horseradish Peroxidase onto Bio-Linked Magnetic Particles with Allium Cepa Peel Water Extracts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mirjana%20Petronijevi%C4%87">Mirjana Petronijević</a>, <a href="https://publications.waset.org/abstracts/search?q=Sanja%20Pani%C4%87"> Sanja Panić</a>, <a href="https://publications.waset.org/abstracts/search?q=Aleksandra%20Cvetanovi%C4%87"> Aleksandra Cvetanović</a>, <a href="https://publications.waset.org/abstracts/search?q=Branko%20Kordi%C4%87"> Branko Kordić</a>, <a href="https://publications.waset.org/abstracts/search?q=Nenad%20Grba"> Nenad Grba</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Enzyme peroxidases are biological catalysts and play a major role in phenolic wastewater treatments and other environmental applications. The most studied species from the peroxidases family is horseradish peroxidase (HRP). In environmental processes, HRP could be used in its free or immobilized form. Enzyme immobilization onto solid support is performed to improve the enzyme properties, prolong its lifespan and operational stability and allow its reuse in industrial applications. One of the enzyme supports of a newer generation is magnetic particles (MPs). Fe₃O₄ MPs are the most widely pursued immobilization of enzymes owing to their remarkable advantages of biocompatibility and non-toxicity. Also, MPs can be easily separated and recovered from the water by applying an external magnetic field. On the other hand, metals and metal oxides are not suitable for the covalent binding of enzymes, so it is necessary to perform their surface modification. Fe₃O₄ MPs functionalization could be performed during the process of their synthesis if it takes place in the presence of plant extracts. Extracts of plant material, such as wild plants, herbs, even waste materials of the food and agricultural industry (bark, shell, leaves, peel), are rich in various bioactive components such as polyphenols, flavonoids, sugars, etc. When the synthesis of magnetite is performed in the presence of plant extracts, bioactive components are incorporated into the surface of the magnetite, thereby affecting its functionalization. In this paper, the suitability of bio-magnetite as solid support for covalent immobilization of HRP across glutaraldehyde was examined. The activity of immobilized HRP at different pH values (4-9) and temperatures (20-80°C) and reusability were examined. Bio-MP was synthesized by co-precipitation method from Fe(II) and Fe(III) sulfate salts in the presence of water extract of the Allium cepa peel. The water extract showed 81% of antiradical potential (according to DPPH assay), which is connected with the high content of polyphenols. According to the FTIR analysis, the bio-magnetite contains oxygen functional groups (-OH, -COOH, C=O) suitable for binding to glutaraldehyde, after which the enzyme is covalently immobilized. The immobilized enzyme showed high activity at ambient temperature and pH 7 (30 U/g) and retained ≥ 80% of its activity at a wide range of pH (5-8) and temperature (20-50°C). The HRP immobilized onto bio-MPs showed remarkable stability towards temperature and pH variations compared to the free enzyme form. On the other hand, immobilized HRP showed low reusability after the first washing cycle enzyme retains 50% of its activity, while after the third washing cycle retains only 22%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bio-magnetite" title="bio-magnetite">bio-magnetite</a>, <a href="https://publications.waset.org/abstracts/search?q=enzyme%20immobilization" title=" enzyme immobilization"> enzyme immobilization</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20extracts" title=" water extracts"> water extracts</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20protection" title=" environmental protection"> environmental protection</a> </p> <a href="https://publications.waset.org/abstracts/142934/immobilization-of-horseradish-peroxidase-onto-bio-linked-magnetic-particles-with-allium-cepa-peel-water-extracts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142934.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">223</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">1041</span> Synthesis and Characterization of Zinc (II) Complex and Its Catalytic Activity on C(SP3)-H Oxidation Reactions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yal%C3%A7%C4%B1n%20K%C4%B1l%C4%B1%C3%A7">Yalçın Kılıç</a>, <a href="https://publications.waset.org/abstracts/search?q=%C4%B0brahim%20Kani"> İbrahim Kani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The conversion of hydrocarbons to carbonyl compounds by oxidation reaction is one of the most important reactions in the synthesis of fine chemicals. As a result of the oxidation of hydrocarbons containing aliphatic sp3-CH groups in their structures, aldehydes, ketones or carboxylic acids can be obtained. In this study, OSSO-type 2,2'-[1,4-butanedylbis(thio)]bis-benzoic acid (tsabutH2) ligand and [Zn(µ-tsabut)(phen)]n complex (where phen = 1,10-phenantroline) were synthesized and their structures were characterized by single crystal x-ray diffraction method. The catalytic efficiency of the complex in the catalytic oxidation studies of organic compounds such as cyclohexane, ethylbenzene, diphenylmethane, and p-xylene containing sp3-C-H in its structure was investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=metal%20complex" title="metal complex">metal complex</a>, <a href="https://publications.waset.org/abstracts/search?q=OSSO-type%20ligand" title=" OSSO-type ligand"> OSSO-type ligand</a>, <a href="https://publications.waset.org/abstracts/search?q=catalysis" title=" catalysis"> catalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=oxidation" title=" oxidation"> oxidation</a> </p> <a href="https://publications.waset.org/abstracts/157326/synthesis-and-characterization-of-zinc-ii-complex-and-its-catalytic-activity-on-csp3-h-oxidation-reactions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157326.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">100</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">1040</span> Effect of Thermal Radiation and Chemical Reaction on MHD Flow of Blood in Stretching Permeable Vessel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Binyam%20Teferi">Binyam Teferi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, a theoretical analysis of blood flow in the presence of thermal radiation and chemical reaction under the influence of time dependent magnetic field intensity has been studied. The unsteady non linear partial differential equations of blood flow considers time dependent stretching velocity, the energy equation also accounts time dependent temperature of vessel wall, and concentration equation includes time dependent blood concentration. The governing non linear partial differential equations of motion, energy, and concentration are converted into ordinary differential equations using similarity transformations solved numerically by applying ode45. MATLAB code is used to analyze theoretical facts. The effect of physical parameters viz., permeability parameter, unsteadiness parameter, Prandtl number, Hartmann number, thermal radiation parameter, chemical reaction parameter, and Schmidt number on flow variables viz., velocity of blood flow in the vessel, temperature and concentration of blood has been analyzed and discussed graphically. From the simulation study, the following important results are obtained: velocity of blood flow increases with both increment of permeability and unsteadiness parameter. Temperature of the blood increases in vessel wall as Prandtl number and Hartmann number increases. Concentration of the blood decreases as time dependent chemical reaction parameter and Schmidt number increases. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=stretching%20velocity" title="stretching velocity">stretching velocity</a>, <a href="https://publications.waset.org/abstracts/search?q=similarity%20transformations" title=" similarity transformations"> similarity transformations</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20dependent%20magnetic%20field%20intensity" title=" time dependent magnetic field intensity"> time dependent magnetic field intensity</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20radiation" title=" thermal radiation"> thermal radiation</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20reaction" title=" chemical reaction"> chemical reaction</a> </p> <a href="https://publications.waset.org/abstracts/157021/effect-of-thermal-radiation-and-chemical-reaction-on-mhd-flow-of-blood-in-stretching-permeable-vessel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157021.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">92</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">1039</span> Multifield Problems in 3D Structural Analysis of Advanced Composite Plates and Shells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salvatore%20Brischetto">Salvatore Brischetto</a>, <a href="https://publications.waset.org/abstracts/search?q=Domenico%20Cesare"> Domenico Cesare</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Major improvements in future aircraft and spacecraft could be those dependent on an increasing use of conventional and unconventional multilayered structures embedding composite materials, functionally graded materials, piezoelectric or piezomagnetic materials, and soft foam or honeycomb cores. Layers made of such materials can be combined in different ways to obtain structures that are able to fulfill several structural requirements. The next generation of aircraft and spacecraft will be manufactured as multilayered structures under the action of a combination of two or more physical fields. In multifield problems for multilayered structures, several physical fields (thermal, hygroscopic, electric and magnetic ones) interact each other with different levels of influence and importance. An exact 3D shell model is here proposed for these types of analyses. This model is based on a coupled system including 3D equilibrium equations, 3D Fourier heat conduction equation, 3D Fick diffusion equation and electric and magnetic divergence equations. The set of partial differential equations of second order in z is written using a mixed curvilinear orthogonal reference system valid for spherical and cylindrical shell panels, cylinders and plates. The order of partial differential equations is reduced to the first one thanks to the redoubling of the number of variables. The solution in the thickness z direction is obtained by means of the exponential matrix method and the correct imposition of interlaminar continuity conditions in terms of displacements, transverse stresses, electric and magnetic potentials, temperature, moisture content and transverse normal multifield fluxes. The investigated structures have simply supported sides in order to obtain a closed form solution in the in-plane directions. Moreover, a layerwise approach is proposed which allows a 3D correct description of multilayered anisotropic structures subjected to field loads. Several results will be proposed in tabular and graphical formto evaluate displacements, stresses and strains when mechanical loads, temperature gradients, moisture content gradients, electric potentials and magnetic potentials are applied at the external surfaces of the structures in steady-state conditions. In the case of inclusions of piezoelectric and piezomagnetic layers in the multilayered structures, so called smart structures are obtained. In this case, a free vibration analysis in open and closed circuit configurations and a static analysis for sensor and actuator applications will be proposed. The proposed results will be useful to better understand the physical and structural behaviour of multilayered advanced composite structures in the case of multifield interactions. Moreover, these analytical results could be used as reference solutions for those scientists interested in the development of 3D and 2D numerical shell/plate models based, for example, on the finite element approach or on the differential quadrature methodology. The correct impositions of boundary geometrical and load conditions, interlaminar continuity conditions and the zigzag behaviour description due to transverse anisotropy will be also discussed and verified. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=composite%20structures" title="composite structures">composite structures</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20shell%20model" title=" 3D shell model"> 3D shell model</a>, <a href="https://publications.waset.org/abstracts/search?q=stress%20analysis" title=" stress analysis"> stress analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=multifield%20loads" title=" multifield loads"> multifield loads</a>, <a href="https://publications.waset.org/abstracts/search?q=exponential%20matrix%20method" title=" exponential matrix method"> exponential matrix method</a>, <a href="https://publications.waset.org/abstracts/search?q=layer%20wise%20approach" title=" layer wise approach"> layer wise approach</a> </p> <a href="https://publications.waset.org/abstracts/170453/multifield-problems-in-3d-structural-analysis-of-advanced-composite-plates-and-shells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/170453.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">67</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">1038</span> Influence of Acceptor Dopant on the Physicochemical and Transport Properties of Textured BaCe0.5Zr0.3ln0.2O3−Δ Materials (Ln = Yb, Y, Cd, Sm, Nd)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20Lyagaeva">J. Lyagaeva</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Medvedev"> D. Medvedev</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Brouzgou"> A. Brouzgou</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Demin"> A. Demin</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Tsiakaras"> P. Tsiakaras</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The investigation of highly conductive and chemically stable electrolytes for solid oxide fuel cells (SOFC) is a necessity. The aim of the present work is to study the influence of acceptor dopant on the functional properties of textured BaCe0.5Zr0.3Ln0.2O3−δ (Ln = Yb, Y, Gd, Sm, Nd) ceramics. The X-Ray diffraction analysis, scanning electron microscopy, dilatometry and 4-probe dc method of conductivity measurements were used. It was found that the mean grain size of ceramics increases (from 1.4 to 3.2 μm), thermal expansion coefficient grows (from 7.6•10–6 to 10.7•10–6 К–1), but ionic conductivity decreases (from 14 to 3 mS cm–1 at 900°С), when ionic radii of impurity acceptor increases from 0.868 Å (Yb3+) to 0.983 Å (Nd3+). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=acceptor%20dopant" title="acceptor dopant">acceptor dopant</a>, <a href="https://publications.waset.org/abstracts/search?q=crystal%20structure" title=" crystal structure"> crystal structure</a>, <a href="https://publications.waset.org/abstracts/search?q=proton-conducting" title=" proton-conducting"> proton-conducting</a>, <a href="https://publications.waset.org/abstracts/search?q=SOFC" title=" SOFC"> SOFC</a> </p> <a href="https://publications.waset.org/abstracts/23077/influence-of-acceptor-dopant-on-the-physicochemical-and-transport-properties-of-textured-bace05zr03ln02o3d-materials-ln-yb-y-cd-sm-nd" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23077.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">371</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">1037</span> Industrial Rock Characterization using Nuclear Magnetic Resonance (NMR): A Case Study of Ewekoro Quarry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Olawale%20Babatunde%20Olatinsu">Olawale Babatunde Olatinsu</a>, <a href="https://publications.waset.org/abstracts/search?q=Deborah%20Oluwaseun%20Olorode"> Deborah Oluwaseun Olorode</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Industrial rocks were collected from a quarry site at Ewekoro in south-western Nigeria and analysed using Nuclear Magnetic Resonance (NMR) technique. NMR measurement was conducted on the samples in partial water-saturated and full brine-saturated conditions. Raw NMR data were analysed with the aid of T2 curves and T2 spectra generated by inversion of raw NMR data using conventional regularized least-squares inversion routine. Results show that NMR transverse relaxation (T2) signatures fairly adequately distinguish between the rock types. Similar T2 curve trend and rates at partial saturation suggests that the relaxation is mainly due to adsorption of water on micropores of similar sizes while T2 curves at full saturation depict relaxation decay rate as: 1/T2(shale)>1/ T2(glauconite)>1/ T2(limestone) and 1/T2(sandstone). NMR T2 distributions at full brine-saturation show: unimodal distribution in shale; bimodal distribution in sandstone and glauconite; and trimodal distribution in limestone. Full saturation T2 distributions revealed the presence of well-developed and more abundant micropores in all the samples with T2 in the range, 402-504 μs. Mesopores with amplitudes much lower than those of micropores are present in limestone, sandstone and glauconite with T2 range: 8.45-26.10 ms, 6.02-10.55 ms, and 9.45-13.26 ms respectively. Very low amplitude macropores of T2 values, 90.26-312.16 ms, are only recognizable in limestone samples. Samples with multiple peaks showed well-connected pore systems with sandstone having the highest degree of connectivity. The difference in T2 curves and distributions for the rocks at full saturation can be utilised as a potent diagnostic tool for discrimination of these rock types found at Ewekoro. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ewekoro" title="Ewekoro">Ewekoro</a>, <a href="https://publications.waset.org/abstracts/search?q=NMR%20techniques" title=" NMR techniques"> NMR techniques</a>, <a href="https://publications.waset.org/abstracts/search?q=industrial%20rocks" title=" industrial rocks"> industrial rocks</a>, <a href="https://publications.waset.org/abstracts/search?q=characterization" title=" characterization"> characterization</a>, <a href="https://publications.waset.org/abstracts/search?q=relaxation" title=" relaxation"> relaxation</a> </p> <a href="https://publications.waset.org/abstracts/2789/industrial-rock-characterization-using-nuclear-magnetic-resonance-nmr-a-case-study-of-ewekoro-quarry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2789.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">297</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">1036</span> Investigation of the Stability and Spintronic Properties of NbrhgeX (X= Cr, Co, Mn, Fe, Ni) Using Density Functional Theory</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shittu%20Akinpelu">Shittu Akinpelu</a>, <a href="https://publications.waset.org/abstracts/search?q=Issac%20Popoola"> Issac Popoola</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The compound NbRhGe has been predicted to be a semiconductor with excellent mechanical properties. It is an indirect band gap material. The potential of NbRhGe for non-volatile data storage via element addition is being studied using the Density Functional Theory (DFT). Preliminary results on the electronic and magnetic properties are suggestive for their application in spintronic. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=half-metals" title="half-metals">half-metals</a>, <a href="https://publications.waset.org/abstracts/search?q=Heusler%20compound" title=" Heusler compound"> Heusler compound</a>, <a href="https://publications.waset.org/abstracts/search?q=semiconductor" title=" semiconductor"> semiconductor</a>, <a href="https://publications.waset.org/abstracts/search?q=spintronic" title=" spintronic "> spintronic </a> </p> <a href="https://publications.waset.org/abstracts/124973/investigation-of-the-stability-and-spintronic-properties-of-nbrhgex-x-cr-co-mn-fe-ni-using-density-functional-theory" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124973.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">170</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">1035</span> Validity of Universe Structure Conception as Nested Vortexes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khaled%20M.%20Nabil">Khaled M. Nabil</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper introduces the Nested Vortexes conception of the universe structure and interprets all the physical phenomena according this conception. The paper first reviews recent physics theories, either in microscopic scale or macroscopic scale, to collect evidence that the space is not empty. But, these theories describe the property of the space medium without determining its structure. Determining the structure of space medium is essential to understand the mechanism that leads to its properties. Without determining the space medium structure, many phenomena; such as electric and magnetic fields, gravity, or wave-particle duality remain uninterpreted. Thus, this paper introduces a conception about the structure of the universe. It assumes that the universe is a medium of ultra-tiny homogeneous particles which are still undiscovered. Like any medium with certain movements, possibly because of a great asymmetric explosion, vortexes have occurred. A vortex condenses the ultra-tiny particles in its center forming a bigger particle, the bigger particles, in turn, could be trapped in a bigger vortex and condense in its center forming a much bigger particle and so on. This conception describes galaxies, stars, protons as particles at different levels. Existing of the particle’s vortexes make the consistency of the speed of light postulate is not true. This conception shows that the vortex motion dynamic agrees with the motion of all the universe particles at any level. An experiment has been carried out to detect the orbiting effect of aggregated vortexes of aligned atoms of a permanent magnet. Based on the described particle’s structure, the gravity force of a particle and attraction between particles as well as charge, electric and magnetic fields and quantum mechanics characteristics are interpreted. All augmented physics phenomena are solved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=astrophysics" title="astrophysics">astrophysics</a>, <a href="https://publications.waset.org/abstracts/search?q=cosmology" title=" cosmology"> cosmology</a>, <a href="https://publications.waset.org/abstracts/search?q=particles%E2%80%99%20structure%20model" title=" particles’ structure model"> particles’ structure model</a>, <a href="https://publications.waset.org/abstracts/search?q=particles%E2%80%99%20forces" title=" particles’ forces"> particles’ forces</a> </p> <a href="https://publications.waset.org/abstracts/124805/validity-of-universe-structure-conception-as-nested-vortexes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124805.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">119</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1034</span> Multimetallic and Multiferocenyl Assemblies of Ferocenyl-Based Dithiophospohonate and Their Electrochemical Properties </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20Tomilla%20Ajayi">J. Tomilla Ajayi</a>, <a href="https://publications.waset.org/abstracts/search?q=Werner%20E.%20Van%20Zyl"> Werner E. Van Zyl</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work presents an overview of the reaction of 2, 4-diferrocenyl-1, 3-dithiadiphosphetane-2, 4-disulfide (Ferrocenyl Lawesson’s reagent) with water to produce the non-symmetric, ferocenyl dithiophosphonic acid respectively in high yields. These acids were readily deprotonated by anhydrous Ammonia to yield the corresponding ammonium salt NH4S2PFcOH. These were complex to Ni (II) in molar ratio 1:1 and 1:2. The resulting complex from the reaction formed same compound with different isomers (Cis and Trans) and also compound with multimetallic coordination. Quality X-ray crystals were formed from THF/Ether. The compounds were characterized by 1H, 31P NMR, and FTIR. Bulk purity were confirmed by either ESI-MS or elemental analysis and The XRD images were obtained using single crystal X-ray crystallographic studies. The electrochemical investigation of the Compounds were carried out using cyclic voltammetry. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ferrocenyl" title="ferrocenyl">ferrocenyl</a>, <a href="https://publications.waset.org/abstracts/search?q=dithiophosphonate" title=" dithiophosphonate"> dithiophosphonate</a>, <a href="https://publications.waset.org/abstracts/search?q=isomer" title=" isomer"> isomer</a>, <a href="https://publications.waset.org/abstracts/search?q=coordination" title=" coordination "> coordination </a> </p> <a href="https://publications.waset.org/abstracts/43568/multimetallic-and-multiferocenyl-assemblies-of-ferocenyl-based-dithiophospohonate-and-their-electrochemical-properties" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43568.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">248</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">1033</span> Field Theories in Chiral Liquid Crystals: A Theory for Helicoids and Skyrmions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20De%20Matteis">G. De Matteis</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Martina"> L. Martina</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Turco"> V. Turco</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The work is focused on determining and comparing special nonlinear static configurations in cholesteric liquid crystals (CLCs), confined between two parallel plates and in the presence of an external static electric/magnetic field. The solutions are stabilised by topological and non-topological conservation laws since they are described in terms of integrable or partially integrable nonlinear boundary value problems. In cholesteric liquid crystals which are subject to geometric frustration; anchoring conditions at boundaries, i.e., homeotropic conditions, are incompatible with the cholesteric twist. This aspect turns out to be essential in the admissible classes of solutions, allowing also for disclination type singularities. Within the framework of Frank-Oseen theory, we study the static configurations for CLCs. First, we find numerical solutions for isolated axisymmetric states in confined CLCs with weak homeotropic anchoring at the boundaries. These solutions describe 3-dimensional modulations, namely spherulites or cholesteric bubbles, actually observed in these systems, of standard baby skyrmions. Relations with well-known nonlinear integrable systems are found and are used to explore the asymptotic behavior of the solutions. Then we turn our attention to extended periodic static configurations called Helicoids or cholesteric fingers, described by an elliptic sine-Gordon model with appropriate boundary conditions, showing how their period and energies are determined by both the thickness of the cell and the intensity of the external electric/magnetic field. We explicitly show that helicoids with π or 2π of rotations of the molecular director are different in many aspects and are not simply algebraically related. The behaviour of the solutions, their energy and the properties of the associated disclinations are discussed in detail, both analytically and numerically. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cholesteric%20liquid%20crystals" title="cholesteric liquid crystals">cholesteric liquid crystals</a>, <a href="https://publications.waset.org/abstracts/search?q=geometric%20frustration" title=" geometric frustration"> geometric frustration</a>, <a href="https://publications.waset.org/abstracts/search?q=helicoids" title=" helicoids"> helicoids</a>, <a href="https://publications.waset.org/abstracts/search?q=skyrmions" title=" skyrmions"> skyrmions</a> </p> <a href="https://publications.waset.org/abstracts/100875/field-theories-in-chiral-liquid-crystals-a-theory-for-helicoids-and-skyrmions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/100875.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">129</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1032</span> Tuning the Emission Colour of Phenothiazine by Introduction of Withdrawing Electron Groups </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Andrei%20Bejan">Andrei Bejan</a>, <a href="https://publications.waset.org/abstracts/search?q=Luminita%20Marin"> Luminita Marin</a>, <a href="https://publications.waset.org/abstracts/search?q=Dalila%20Belei"> Dalila Belei</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Phenothiazine with electron-rich nitrogen and sulfur heteroatoms has a high electron-donating ability which promotes a good conjugation and therefore low band-gap with consequences upon charge carrier mobility improving and shifting of light emission in visible domain. Moreover, its non-planar butterfly conformation inhibits molecular aggregation and thus preserves quite well the fluorescence quantum yield in solid state compared to solution. Therefore phenothiazine and its derivatives are promising hole transport materials for use in organic electronic and optoelectronic devices as light emitting diodes, photovoltaic cells, integrated circuit sensors or driving circuits for large area display devices. The objective of this paper was to obtain a series of new phenothiazine derivatives by introduction of different electron withdrawing substituents as formyl, carboxyl and cyanoacryl units in order to create a push pull system which has potential to improve the electronic and optical properties. Bromine atom was used as electrono-donor moiety to extend furthermore the existing conjugation. The understudy compounds were structural characterized by FTIR and 1H-NMR spectroscopy and single crystal X-ray diffraction. Besides, the single crystal X-ray diffraction brought information regarding the supramolecular architecture of the compounds. Photophysical properties were monitored by UV-vis and photoluminescence spectroscopy, while the electrochemical behavior was established by cyclic voltammetry. The absorption maxima of the studied compounds vary in a large range (322-455 nm), reflecting the different electronic delocalization degree, depending by the substituent nature. In a similar manner, the emission spectra reveal different color of emitted light, a red shift being evident for the groups with higher electron withdrawing ability. The emitted light is pure and saturated for the compounds containing strong withdrawing formyl or cyanoacryl units and reach the highest quantum yield of 71% for the compound containing bromine and cyanoacrilic units. Electrochemical study show reversible oxidative and reduction processes for all the compounds and a close correlation of the HOMO-LUMO band gap with substituent nature. All these findings suggest the obtained compounds as promising materials for optoelectronic devices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20properties" title="electrochemical properties">electrochemical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=phenothiazine%20derivatives" title=" phenothiazine derivatives"> phenothiazine derivatives</a>, <a href="https://publications.waset.org/abstracts/search?q=photoluminescence" title=" photoluminescence"> photoluminescence</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20yield" title=" quantum yield"> quantum yield</a> </p> <a href="https://publications.waset.org/abstracts/27320/tuning-the-emission-colour-of-phenothiazine-by-introduction-of-withdrawing-electron-groups" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27320.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">329</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1031</span> Beneficiation of Low Grade Chromite Ore and Its Characterization for the Formation of Magnesia-Chromite Refractory by Economically Viable Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amit%20Kumar%20Bhandary">Amit Kumar Bhandary</a>, <a href="https://publications.waset.org/abstracts/search?q=Prithviraj%20Gupta"> Prithviraj Gupta</a>, <a href="https://publications.waset.org/abstracts/search?q=Siddhartha%20Mukherjee"> Siddhartha Mukherjee</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahua%20Ghosh%20Chaudhuri"> Mahua Ghosh Chaudhuri</a>, <a href="https://publications.waset.org/abstracts/search?q=Rajib%20Dey"> Rajib Dey</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Chromite ores are primarily used for extraction of chromium, which is an expensive metal. For low grade chromite ores (containing less than 40% Cr<sub>2</sub>O<sub>3</sub>), the chromium extraction is not usually economically viable. India possesses huge quantities of low grade chromite reserves. This deposit can be utilized after proper physical beneficiation. Magnetic separation techniques may be useful after reduction for the beneficiation of low grade chromite ore. The sample collected from the sukinda mines is characterized by XRD which shows predominant phases like maghemite, chromite, silica, magnesia and alumina. The raw ore is crushed and ground to below 75 micrometer size. The microstructure of the ore shows that the chromite grains surrounded by a silicate matrix and porosity observed the exposed side of the chromite ore. However, this ore may be utilized in refractory applications. Chromite ores contain Cr<sub>2</sub>O<sub>3</sub>, FeO, Al<sub>2</sub>O<sub>3</sub> and other oxides like Fe-Cr, Mg-Cr have a high tendency to form spinel compounds, which usually show high refractoriness. Initially, the low grade chromite ore (containing 34.8% Cr<sub>2</sub>O<sub>3</sub>) was reduced at 1200 <sup>0</sup>C for 80 minutes with 30% coke fines by weight, before being subjected to magnetic separation. The reduction by coke leads to conversion of higher state of iron oxides converted to lower state of iron oxides. The pre-reduced samples are then characterized by XRD. The magnetically inert mass was then reacted with 20% MgO by weight at 1450 <sup>0</sup>C for 2 hours. The resultant product was then tested for various refractoriness parameters like apparent porosity, slag resistance etc. The results were satisfactory, indicating that the resultant spinel compounds are suitable for refractory applications for elevated temperature processes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=apparent%20porosity" title="apparent porosity">apparent porosity</a>, <a href="https://publications.waset.org/abstracts/search?q=beneficiation" title=" beneficiation"> beneficiation</a>, <a href="https://publications.waset.org/abstracts/search?q=low-grade%20chromite" title=" low-grade chromite"> low-grade chromite</a>, <a href="https://publications.waset.org/abstracts/search?q=refractory" title=" refractory"> refractory</a>, <a href="https://publications.waset.org/abstracts/search?q=spinel%20compounds" title=" spinel compounds"> spinel compounds</a>, <a href="https://publications.waset.org/abstracts/search?q=slag%20resistance" title=" slag resistance"> slag resistance</a> </p> <a href="https://publications.waset.org/abstracts/48887/beneficiation-of-low-grade-chromite-ore-and-its-characterization-for-the-formation-of-magnesia-chromite-refractory-by-economically-viable-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48887.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">387</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">1030</span> Transport Properties of Alkali Nitrites </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Y.%20Mateyshina">Y. Mateyshina</a>, <a href="https://publications.waset.org/abstracts/search?q=A.Ulihin"> A.Ulihin</a>, <a href="https://publications.waset.org/abstracts/search?q=N.Uvarov"> N.Uvarov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Electrolytes with different type of charge carrier can find widely application in different using, e.g. sensors, electrochemical equipments, batteries and others. One of important components ensuring stable functioning of the equipment is electrolyte. Electrolyte has to be characterized by high conductivity, thermal stability, and wide electrochemical window. In addition to many advantageous characteristic for liquid electrolytes, the solid state electrolytes have good mechanical stability, wide working range of temperature range. Thus search of new system of solid electrolytes with high conductivity is an actual task of solid state chemistry. Families of alkali perchlorates and nitrates have been investigated by us earlier. In literature data about transport properties of alkali nitrites are absent. Nevertheless, alkali nitrites MeNO2 (Me= Li+, Na+, K+, Rb+ and Cs+), except for the lithium salt, have high-temperature phases with crystal structure of the NaCl-type. High-temperature phases of nitrites are orientationally disordered, i.e. non-spherical anions are reoriented over several equivalents directions in the crystal lattice. Pure lithium nitrite LiNO2 is characterized by ionic conductivity near 10-4 S/cm at 180°C and more stable as compared with lithium nitrate and can be used as a component for synthesis of composite electrolytes. In this work composite solid electrolytes in the binary system LiNO2 - A (A= MgO, -Al2O3, Fe2O3, CeO2, SnO2, SiO2) were synthesized and their structural, thermodynamic and electrical properties investigated. Alkali nitrite was obtained by exchange reaction from water solutions of barium nitrite and alkali sulfate. The synthesized salt was characterized by X-ray powder diffraction technique using D8 Advance X-Ray Diffractometer with Cu K radiation. Using thermal analysis, the temperatures of dehydration and thermal decomposition of salt were determined.. The conductivity was measured using a two electrode scheme in a forevacuum (6.7 Pa) with an HP 4284A (Precision LCR meter) in a frequency range 20 Hz < ν < 1 MHz. Solid composite electrolytes LiNO2 - A A (A= MgO, -Al2O3, Fe2O3, CeO2, SnO2, SiO2) have been synthesized by mixing of preliminary dehydrated components followed by sintering at 250°C. In the series of nitrite of alkaline metals Li+-Cs+, the conductivity varies not monotonically with increasing radius of cation. The minimum conductivity is observed for KNO2; however, with further increase in the radius of cation in the series, the conductivity tends to increase. The work was supported by the Russian Foundation for Basic research, grant #14-03-31442. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=conductivity" title="conductivity">conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=alkali%20nitrites" title=" alkali nitrites"> alkali nitrites</a>, <a href="https://publications.waset.org/abstracts/search?q=composite%20electrolytes" title=" composite electrolytes"> composite electrolytes</a>, <a href="https://publications.waset.org/abstracts/search?q=transport%20properties" title=" transport properties"> transport properties</a> </p> <a href="https://publications.waset.org/abstracts/34633/transport-properties-of-alkali-nitrites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34633.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">319</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">1029</span> Box-Behnken Design for the Biosorption of Cationic Dye from Aqueous Solution Using a Zero-Valent Iron Nano Algal Composite</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V.%20Sivasubramanian">V. Sivasubramanian</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Jerold"> M. Jerold</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The advancement of adsorption is the development of nano-biocomposite for the sorption dyes and heavy metal ions. In fact, Nanoscale zerovalent iron (NZVI) is cost-effective reducing agent and a most reliable biosorbent for the dye biosorption. In this study, nano zero valent iron Sargassum swartzii (nZVI-SS) biocomposite, a novel marine algal based biosorbent, was used for the removal of simulated crystal violet (CV) in batch mode of operation. The Box-Behnen design (BBD) experimental results revealed the biosoprtion was maximum at pH 7.5, biosorbent dosage 0.1 g/L and initial CV concentration of 100 mg/L. Therefore, the result implies that nZVI-SS biocomposite is a cheap and most promising biosorbent for the removal of CV from wastewater. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=algae" title="algae">algae</a>, <a href="https://publications.waset.org/abstracts/search?q=biosorption" title=" biosorption"> biosorption</a>, <a href="https://publications.waset.org/abstracts/search?q=zero-valent" title=" zero-valent"> zero-valent</a>, <a href="https://publications.waset.org/abstracts/search?q=dye" title=" dye"> dye</a>, <a href="https://publications.waset.org/abstracts/search?q=waste%20water" title=" waste water"> waste water</a> </p> <a href="https://publications.waset.org/abstracts/78853/box-behnken-design-for-the-biosorption-of-cationic-dye-from-aqueous-solution-using-a-zero-valent-iron-nano-algal-composite" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78853.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">248</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">1028</span> A Radiomics Approach to Predict the Evolution of Prostate Imaging Reporting and Data System Score 3/5 Prostate Areas in Multiparametric Magnetic Resonance</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Natascha%20C.%20D%27Amico">Natascha C. D'Amico</a>, <a href="https://publications.waset.org/abstracts/search?q=Enzo%20Grossi"> Enzo Grossi</a>, <a href="https://publications.waset.org/abstracts/search?q=Giovanni%20Valbusa"> Giovanni Valbusa</a>, <a href="https://publications.waset.org/abstracts/search?q=Ala%20Malasevschi"> Ala Malasevschi</a>, <a href="https://publications.waset.org/abstracts/search?q=Gianpiero%20Cardone"> Gianpiero Cardone</a>, <a href="https://publications.waset.org/abstracts/search?q=Sergio%20Papa"> Sergio Papa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Purpose: To characterize, through a radiomic approach, the nature of areas classified PI-RADS (Prostate Imaging Reporting and Data System) 3/5, recognized in multiparametric prostate magnetic resonance with T2-weighted (T2w), diffusion and perfusion sequences with paramagnetic contrast. Methods and Materials: 24 cases undergoing multiparametric prostate MR and biopsy were admitted to this pilot study. Clinical outcome of the PI-RADS 3/5 was found through biopsy, finding 8 malignant tumours. The analysed images were acquired with a Philips achieva 1.5T machine with a CE- T2-weighted sequence in the axial plane. Semi-automatic tumour segmentation was carried out on MR images using 3DSlicer image analysis software. 45 shape-based, intensity-based and texture-based features were extracted and represented the input for preprocessing. An evolutionary algorithm (a TWIST system based on KNN algorithm) was used to subdivide the dataset into training and testing set and select features yielding the maximal amount of information. After this pre-processing 20 input variables were selected and different machine learning systems were used to develop a predictive model based on a training testing crossover procedure. Results: The best machine learning system (three-layers feed-forward neural network) obtained a global accuracy of 90% ( 80 % sensitivity and 100% specificity ) with a ROC of 0.82. Conclusion: Machine learning systems coupled with radiomics show a promising potential in distinguishing benign from malign tumours in PI-RADS 3/5 areas. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=machine%20learning" title="machine learning">machine learning</a>, <a href="https://publications.waset.org/abstracts/search?q=MR%20prostate" title=" MR prostate"> MR prostate</a>, <a href="https://publications.waset.org/abstracts/search?q=PI-Rads%203" title=" PI-Rads 3"> PI-Rads 3</a>, <a href="https://publications.waset.org/abstracts/search?q=radiomics" title=" radiomics"> radiomics</a> </p> <a href="https://publications.waset.org/abstracts/84292/a-radiomics-approach-to-predict-the-evolution-of-prostate-imaging-reporting-and-data-system-score-35-prostate-areas-in-multiparametric-magnetic-resonance" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84292.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">188</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1027</span> Vertically Coupled III-V/Silicon Single Mode Laser with a Hybrid Grating Structure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zekun%20Lin">Zekun Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Xun%20Li"> Xun Li</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Silicon photonics has gained much interest and extensive research for a promising aspect for fabricating compact, high-speed and low-cost photonic devices compatible with complementary metal-oxide-semiconductor (CMOS) process. Despite the remarkable progress made on the development of silicon photonics, high-performance, cost-effective, and reliable silicon laser sources are still missing. In this work, we present a 1550 nm III-V/silicon laser design with stable single-mode lasing property and robust and high-efficiency vertical coupling. The InP cavity consists of two uniform Bragg grating sections at sides for mode selection and feedback, as well as a central second-order grating for surface emission. A grating coupler is etched on the SOI waveguide by which the light coupling between the parallel III-V and SOI is reached vertically rather than by evanescent wave coupling. Laser characteristic is simulated and optimized by the traveling-wave model (TWM) and a Green’s function analysis as well as a 2D finite difference time domain (FDTD) method for the coupling process. The simulation results show that single-mode lasing with SMSR better than 48dB is achievable, and the threshold current is less than 15mA with a slope efficiency of around 0.13W/A. The coupling efficiency is larger than 42% and possesses a high tolerance with less than 10% reduction for 10 um horizontal or 15 um vertical dislocation. The design can be realized by standard flip-chip bonding techniques without co-fabrication of III-V and silicon or precise alignment. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=III-V%2Fsilicon%20integration" title="III-V/silicon integration">III-V/silicon integration</a>, <a href="https://publications.waset.org/abstracts/search?q=silicon%20photonics" title=" silicon photonics"> silicon photonics</a>, <a href="https://publications.waset.org/abstracts/search?q=single%20mode%20laser" title=" single mode laser"> single mode laser</a>, <a href="https://publications.waset.org/abstracts/search?q=vertical%20coupling" title=" vertical coupling"> vertical coupling</a> </p> <a href="https://publications.waset.org/abstracts/135489/vertically-coupled-iii-vsilicon-single-mode-laser-with-a-hybrid-grating-structure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/135489.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">156</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">1026</span> First-Principles Investigation of the Structural and Electronic Properties of Mg1-xBixO</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20P.%20Abdel%20Rahim">G. P. Abdel Rahim</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Mar%C3%ADa%20Guadalupe%20Moreno%20Armenta"> M. María Guadalupe Moreno Armenta</a>, <a href="https://publications.waset.org/abstracts/search?q=Jairo%20Arbey%20Rodriguez"> Jairo Arbey Rodriguez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We investigated the structure and electronic properties of the compound Mg1-xBixO with varying concentrations of 0, ¼, ½, and ¾ x bismuth in the the NaCl (rock-salt) and WZ (wurtzite) phases. The calculations were performed using the first-principles pseudo-potential method within the framework of spin density functional theory (DFT). Our calculations predict that for Bi concentrations greater than ~70%, the WZ structure is more favorable than the NaCl one and that for x = 0 (pure MgO), x = 0.25 and x = 0.50 of Bi concentration the NaCl structure is more favorable than the WZ one. For x = 0.75 of Bi, a transition from wurtzite towards NaCl is possible, when the pressure is about 22 GPa. Also It has been observed the crystal lattice constant closely follows Vegard’s law, that the bulk modulus and the cohesion energy decrease with the concentration x of Bi. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DFT" title="DFT">DFT</a>, <a href="https://publications.waset.org/abstracts/search?q=Mg1-xBixO" title=" Mg1-xBixO"> Mg1-xBixO</a>, <a href="https://publications.waset.org/abstracts/search?q=pseudo-potential" title=" pseudo-potential"> pseudo-potential</a>, <a href="https://publications.waset.org/abstracts/search?q=rock-salt" title=" rock-salt"> rock-salt</a>, <a href="https://publications.waset.org/abstracts/search?q=wurtzite" title=" wurtzite"> wurtzite</a> </p> <a href="https://publications.waset.org/abstracts/24781/first-principles-investigation-of-the-structural-and-electronic-properties-of-mg1-xbixo" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24781.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">1025</span> Surface Coating of Polyester Fabrics by Sol Gel Synthesized ZnO Particles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Merve%20K%C3%BC%C3%A7%C3%BCk">Merve Küçük</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20L%C3%BCtfi%20%C3%96ve%C3%A7o%C4%9Flu"> M. Lütfi Öveçoğlu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Zinc oxide particles were synthesized using the sol-gel method and dip coated on polyester fabric. X-ray diffraction (XRD) analysis revealed a single crystal phase of ZnO particles. Chemical characteristics of the polyester fabric surface were investigated using attenuated total reflection-Fourier transform infrared (ATR-FTIR) measurements. Morphology of ZnO coated fabric was analyzed using field emission scanning electron microscopy (FESEM). After particle analysis, the aqueous ZnO solution resulted in a narrow size distribution at submicron levels. The deposit of ZnO on polyester fabrics yielded a homogeneous spread of spherical particles. Energy dispersive X-ray spectroscopy (EDX) results also affirmed the presence of ZnO particles on the polyester fabrics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dip%20coating" title="dip coating">dip coating</a>, <a href="https://publications.waset.org/abstracts/search?q=polyester%20fabrics" title=" polyester fabrics"> polyester fabrics</a>, <a href="https://publications.waset.org/abstracts/search?q=sol%20gel" title=" sol gel"> sol gel</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20oxide" title=" zinc oxide"> zinc oxide</a> </p> <a href="https://publications.waset.org/abstracts/54523/surface-coating-of-polyester-fabrics-by-sol-gel-synthesized-zno-particles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54523.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 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