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physics</title> <meta name="description" content="Search results for: space plasma physics"> <meta name="keywords" content="space plasma physics"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="space plasma physics"> <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> 5127</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: space plasma physics</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5127</span> Electron Beam Effects on Kinetic Alfven Waves in the Cold Homogenous Plasma</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jaya%20Shrivastava">Jaya Shrivastava </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The particle aspect approach is adopted to investigate the trajectories of charged particles in the electromagnetic field of kinetic Alfven wave. Expressions are found for the dispersion relation, growth/damping rate and associated currents in the presence of electron beam in homogenous plasma. Kinetic effects of electrons and ions are included to study kinetic Alfven wave because both are important in the transition region. The plasma parameters appropriate to plasma sheet boundary layer are used. It is found that downward electron beam affects the dispersion relation, growth/damping-rate and associated currents in cold electron limit. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetospheric%20physics" title="magnetospheric physics">magnetospheric physics</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20waves%20and%20instabilities" title=" plasma waves and instabilities"> plasma waves and instabilities</a>, <a href="https://publications.waset.org/abstracts/search?q=electron%20beam" title=" electron beam"> electron beam</a>, <a href="https://publications.waset.org/abstracts/search?q=space%20plasma%20physics" title=" space plasma physics"> space plasma physics</a>, <a href="https://publications.waset.org/abstracts/search?q=wave-particle%20interactions" title=" wave-particle interactions"> wave-particle interactions</a> </p> <a href="https://publications.waset.org/abstracts/5551/electron-beam-effects-on-kinetic-alfven-waves-in-the-cold-homogenous-plasma" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5551.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">394</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">5126</span> A Unification and Relativistic Correction for Boltzmann’s Law</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lloyd%20G.%20Allred">Lloyd G. Allred</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The distribution of velocities of particles in plasma is a well understood discipline of plasma physics. Boltzmann’s law and the Maxwell-Boltzmann distribution describe the distribution of velocity of a particle in plasma as a function of mass and temperature. Particles with the same mass tend to have the same velocity. By expressing the same law in terms of energy alone, the author obtains a distribution independent of mass. In summary, for particles in plasma, the energies tend to equalize, independent of the masses of the individual particles. For high-energy plasma, the original law predicts velocities greater than the speed of light. If one uses Einstein’s formula for energy (<em>E=mc<sup>2</sup></em>), then a relativistic correction is not required. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cosmology" title="cosmology">cosmology</a>, <a href="https://publications.waset.org/abstracts/search?q=EMP" title=" EMP"> EMP</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20physics" title=" plasma physics"> plasma physics</a>, <a href="https://publications.waset.org/abstracts/search?q=relativity" title=" relativity"> relativity</a> </p> <a href="https://publications.waset.org/abstracts/84272/a-unification-and-relativistic-correction-for-boltzmanns-law" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84272.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">219</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">5125</span> Simulation Study on Spacecraft Surface Charging Induced by Jovian Plasma Environment with Particle in Cell Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meihua%20Fang">Meihua Fang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yipan%20Guo"> Yipan Guo</a>, <a href="https://publications.waset.org/abstracts/search?q=Tao%20Fei"> Tao Fei</a>, <a href="https://publications.waset.org/abstracts/search?q=Pengyu%20Tian"> Pengyu Tian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Space plasma caused spacecraft surface charging is the major space environment hazard. Particle in cell (PIC) method can be used to simulate the interaction between space plasma and spacecraft. It was proved that surface charging level of spacecraft in Jupiter’s orbits was high for its’ electron-heavy plasma environment. In this paper, Jovian plasma environment is modeled and surface charging analysis is carried out by PIC based software Spacecraft Plasma Interaction System (SPIS). The results show that the spacecraft charging potentials exceed 1000V at 2Rj, 15Rj and 25Rj polar orbits in the dark side at worst case plasma model. Furthermore, the simulation results indicate that the large Jovian magnetic field increases the surface charging level for secondary electron gyration. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jupiter" title="Jupiter">Jupiter</a>, <a href="https://publications.waset.org/abstracts/search?q=PIC" title=" PIC"> PIC</a>, <a href="https://publications.waset.org/abstracts/search?q=space%20plasma" title=" space plasma"> space plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20charging" title=" surface charging"> surface charging</a> </p> <a href="https://publications.waset.org/abstracts/106455/simulation-study-on-spacecraft-surface-charging-induced-by-jovian-plasma-environment-with-particle-in-cell-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/106455.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">150</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">5124</span> Numerical Study on Self-Confined Plasmoid Transport Phenomena in an Electrodeless Plasma Thruster for Space Propulsion </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Xiaodong%20Wen">Xiaodong Wen</a>, <a href="https://publications.waset.org/abstracts/search?q=Lijuan%20Liu"> Lijuan Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=Xinfeng%20Sun"> Xinfeng Sun</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A high power electrodeless plasma thruster is being developed at Lanzhou Institute of Physics. In this thruster, a rotating magnetic field (RMF) driven by two radio-frequency coils which dephased by 90 degrees are applied both for propellant ionization and plasma acceleration. In the ionization stage, a very high azimuthal current can be driven by RMF and then makes plasma forms a field reversed configuration, namely self-confined plasmoid. Profoundly understanding the transport characteristics of the plasmoid in the following acceleration stage is the key to improve the thruster performances. In this paper, a 3D MHD model is established and the influences of the RMF and an applied magnetic field on the self-confined plasmoid acceleration are investigated. The simulation results show that, by applying a RMF with strength and frequency of 250 G and 370 kHz, the plasmoid can be accelerated to an average velocity of 17 km/s at the exit of the thruster. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electric%20space%20propulsion" title="electric space propulsion">electric space propulsion</a>, <a href="https://publications.waset.org/abstracts/search?q=field%20reversed%20configuration" title=" field reversed configuration"> field reversed configuration</a>, <a href="https://publications.waset.org/abstracts/search?q=rotating%20magnetic%20field" title=" rotating magnetic field"> rotating magnetic field</a>, <a href="https://publications.waset.org/abstracts/search?q=transport%20phenomena" title=" transport phenomena"> transport phenomena</a> </p> <a href="https://publications.waset.org/abstracts/102125/numerical-study-on-self-confined-plasmoid-transport-phenomena-in-an-electrodeless-plasma-thruster-for-space-propulsion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/102125.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">137</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5123</span> Numerical Experiments for the Purpose of Studying Space-Time Evolution of Various Forms of Pulse Signals in the Collisional Cold Plasma</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Kh.%20Gomidze">N. Kh. Gomidze</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20N.%20Jabnidze"> I. N. Jabnidze</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20A.%20Makharadze"> K. A. Makharadze </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The influence of inhomogeneities of plasma and statistical characteristics on the propagation of signal is very actual in wireless communication systems. While propagating in the media, the deformation and evaluation of the signal in time and space take place and on the receiver we get a deformed signal. The present article is dedicated to studying the space-time evolution of rectangular, sinusoidal, exponential and bi-exponential impulses via numerical experiment in the collisional, cold plasma. The presented method is not based on the Fourier-presentation of the signal. Analytically, we have received the general image depicting the space-time evolution of the radio impulse amplitude that gives an opportunity to analyze the concrete results in the case of primary impulse. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=collisional" title="collisional">collisional</a>, <a href="https://publications.waset.org/abstracts/search?q=cold%20plasma" title=" cold plasma"> cold plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=rectangular%20pulse%20signal" title=" rectangular pulse signal"> rectangular pulse signal</a>, <a href="https://publications.waset.org/abstracts/search?q=impulse%20envelope" title=" impulse envelope"> impulse envelope</a> </p> <a href="https://publications.waset.org/abstracts/73418/numerical-experiments-for-the-purpose-of-studying-space-time-evolution-of-various-forms-of-pulse-signals-in-the-collisional-cold-plasma" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73418.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">383</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">5122</span> Effect of Ionized Plasma Medium on the Radiation of a Rectangular Microstrip Antenna on Ferrite Substrate</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ayman%20Al%20Sawalha">Ayman Al Sawalha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents theoretical investigations on the radiation of rectangular microstrip antenna printed on a magnetized ferrite substrate Ni0.62Co0.02Fe1.948O4 in the presence of ionized plasma medium. The theoretical study of rectangular microstrip antenna in free space is carried out by applying the transmission line model combining with potential function techniques while hydrodynamic theory is used for it is analysis in plasma medium. By taking the biased and unbiased ferrite cases, far-field radiation patterns in free space and plasma medium are obtained which in turn are applied in computing radiated power, directivity, quality factor and bandwidth of antenna. It is found that the presence of plasma medium affects the performance of rectangular microstrip antenna structure significantly. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ferrite" title="ferrite">ferrite</a>, <a href="https://publications.waset.org/abstracts/search?q=microstrip%20antenna" title=" microstrip antenna"> microstrip antenna</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma" title=" plasma"> plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=radiation" title=" radiation"> radiation</a> </p> <a href="https://publications.waset.org/abstracts/45642/effect-of-ionized-plasma-medium-on-the-radiation-of-a-rectangular-microstrip-antenna-on-ferrite-substrate" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45642.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">323</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">5121</span> Teaching Physics: History, Models, and Transformation of Physics Education Research</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Didi%C5%9F%20K%C3%B6rhasan">N. Didiş Körhasan</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Kaltak%C3%A7%C4%B1%20G%C3%BCrel"> D. Kaltakçı Gürel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many students have difficulty in learning physics from elementary to university level. In addition, students' expectancy, attitude, and motivation may be influenced negatively with their experience (failure) and prejudice about physics learning. For this reason, physics educators, who are also physics teachers, search for the best ways to make students' learning of physics easier by considering cognitive, affective, and psychomotor issues in learning. This research critically discusses the history of physics education, fundamental pedagogical approaches, and models to teach physics, and transformation of physics education with recent research. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pedagogy" title="pedagogy">pedagogy</a>, <a href="https://publications.waset.org/abstracts/search?q=physics" title=" physics"> physics</a>, <a href="https://publications.waset.org/abstracts/search?q=physics%20education" title=" physics education"> physics education</a>, <a href="https://publications.waset.org/abstracts/search?q=science%20education" title=" science education"> science education</a> </p> <a href="https://publications.waset.org/abstracts/53785/teaching-physics-history-models-and-transformation-of-physics-education-research" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53785.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">264</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5120</span> Stimulated Raman Scattering of Ultra Intense Hollow Gaussian Beam</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Prerana%20Sharma">Prerana Sharma</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Effect of relativistic nonlinearity on stimulated Raman scattering of the propagating laser beam carrying null intensity in center (hollow Gaussian beam) by excited plasma wave are studied in a collisionless plasma. The construction of the equations is done employing the fluid theory which is developed with partial differential equation and Maxwell’s equations. The analysis is done using eikonal method. The phenonmenon of Stimulated Raman scattering is shown along with the excitation of seed plasma wave. The power of plasma wave and back reflectivity is observed for higher order of hollow Gaussian beam. Back reflectivity is studied numerically for various orders of HGLB with different value of plasma density, laser power and beam radius. Numerical analysis shows that these parameters play vital role on reflectivity characteristics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hollow%20Gaussian%20beam" title="Hollow Gaussian beam">Hollow Gaussian beam</a>, <a href="https://publications.waset.org/abstracts/search?q=relativistic%20nonlinearity" title=" relativistic nonlinearity"> relativistic nonlinearity</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20physics" title=" plasma physics"> plasma physics</a>, <a href="https://publications.waset.org/abstracts/search?q=Raman%20scattering" title=" Raman scattering"> Raman scattering</a> </p> <a href="https://publications.waset.org/abstracts/15768/stimulated-raman-scattering-of-ultra-intense-hollow-gaussian-beam" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15768.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">638</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">5119</span> Magnetic Field Generation in Inhomogeneous Plasma via Ponderomotive Force</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatemeh%20Shahi">Fatemeh Shahi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Sharifian"> Mehdi Sharifian</a>, <a href="https://publications.waset.org/abstracts/search?q=Laia%20Shahrassai"> Laia Shahrassai</a>, <a href="https://publications.waset.org/abstracts/search?q=Elham%20Eskandari%20A."> Elham Eskandari A.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A new mechanism is reported here for magnetic field generation in laser-plasma interaction by means of nonlinear ponderomotive force. The plasma considered here is unmagnetized inhomogeneous plasma with an exponentially decreasing profile. A damped periodic magnetic field with a relatively lower frequency is obtained using the ponderomotive force exerted on plasma electrons. Finally, with an electric field and by using Faraday’s law, the magnetic field profile in the plasma has been obtained. Because of the negative exponential density profile, the generated magnetic field is relatively slowly oscillating and damped through the plasma. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetic%20field%20generation" title="magnetic field generation">magnetic field generation</a>, <a href="https://publications.waset.org/abstracts/search?q=laser-plasma%20interaction" title=" laser-plasma interaction"> laser-plasma interaction</a>, <a href="https://publications.waset.org/abstracts/search?q=ponderomotive%20force" title=" ponderomotive force"> ponderomotive force</a>, <a href="https://publications.waset.org/abstracts/search?q=inhomogeneous%20plasma" title=" inhomogeneous plasma"> inhomogeneous plasma</a> </p> <a href="https://publications.waset.org/abstracts/134152/magnetic-field-generation-in-inhomogeneous-plasma-via-ponderomotive-force" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134152.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">293</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">5118</span> Condition for Plasma Instability and Stability Approaches</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ratna%20Sen">Ratna Sen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As due to very high temperature of Plasma it is very difficult to confine it for sufficient time so that nuclear fusion reactions to take place, As we know Plasma escapes faster than the binary collision rates. We studied the ball analogy and the ‘energy principle’ and calculated the total potential energy for the whole Plasma. If δ ⃗w is negative, that is decrease in potential energy then the plasma will be unstable. We also discussed different approaches of stability analysis such as Nyquist Method, MHD approximation and Vlasov approach of plasma stability. So that by using magnetic field configurations we can able to create a stable Plasma in Tokamak for generating energy for future generations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=jello" title="jello">jello</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20field%20configuration" title=" magnetic field configuration"> magnetic field configuration</a>, <a href="https://publications.waset.org/abstracts/search?q=MHD%20approximation" title=" MHD approximation"> MHD approximation</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20principle" title=" energy principle"> energy principle</a> </p> <a href="https://publications.waset.org/abstracts/50172/condition-for-plasma-instability-and-stability-approaches" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50172.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">442</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">5117</span> Numerical Analysis of 3D Electromagnetic Fields in Annular Induction Plasma</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abderazak%20Guettaf">Abderazak Guettaf</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The mathematical models of the physical phenomena interacting in inductive plasma were described by the physics equations of the continuous mediums. A 3D model based on magnetic potential vector and electric scalar potential (A, V) formulation is used. The finished volume method is applied to electromagnetic equation, to obtain the field distribution inside the plasma. The numerical results of the method developed on a basic model designed starting from a real three-dimensional model were exposed. From the mathematical model 3D spreading assumptions and boundary conditions, we evaluated the electric field in the load and we have developed a numerical code made under the MATLAB environment, all verifying the effectiveness and validity of this code. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electric%20field" title="electric field">electric field</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20magnetic%20potential%20vector%20and%20electric%20scalar%20potential%20%28A" title=" 3D magnetic potential vector and electric scalar potential (A"> 3D magnetic potential vector and electric scalar potential (A</a>, <a href="https://publications.waset.org/abstracts/search?q=V%29%20formulation" title=" V) formulation"> V) formulation</a>, <a href="https://publications.waset.org/abstracts/search?q=finished%20volumes" title=" finished volumes"> finished volumes</a>, <a href="https://publications.waset.org/abstracts/search?q=annular%20plasma" title=" annular plasma"> annular plasma</a> </p> <a href="https://publications.waset.org/abstracts/31587/numerical-analysis-of-3d-electromagnetic-fields-in-annular-induction-plasma" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31587.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">491</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5116</span> Mobile Games Applications Android-Based Physics Education to Improve Student Motivation and Interest in Learning Physics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rizky%20Dwi%20A">Rizky Dwi A</a>, <a href="https://publications.waset.org/abstracts/search?q=Mikha%20Herlina%20Pi"> Mikha Herlina Pi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Physics lessons for high school students, especially in Indonesia is less desirable because many people believe that physics is very difficult, especially the development of increasingly sophisticated era make online gaming more attractive many people especially school children with a variety of increasingly sophisticated gadgets. Therefore, if those two things combined to attract students in physics, the physics-based educational game android can motivate students' interest and understanding of the physics because while playing, they can also learn physics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=education" title="education">education</a>, <a href="https://publications.waset.org/abstracts/search?q=game%20physics" title=" game physics"> game physics</a>, <a href="https://publications.waset.org/abstracts/search?q=interest" title=" interest"> interest</a>, <a href="https://publications.waset.org/abstracts/search?q=student%27s%20motivation" title=" student's motivation"> student's motivation</a> </p> <a href="https://publications.waset.org/abstracts/39431/mobile-games-applications-android-based-physics-education-to-improve-student-motivation-and-interest-in-learning-physics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/39431.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">281</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">5115</span> Research on Space Discharge Flying Saucers Cruising Between Planets</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jiang%20Hua%20Zhou">Jiang Hua Zhou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> According to the article "New Theoretical System of Physics in the 21st Century" published by the author, it is proposed to use the "scientific principle" of the "balanced distance" between "gravity" and "repulsion" between "planets" to "research" - "space flying saucer", and The formula for the law of universal repulsion between substances is proposed. Under the guidance of the new theoretical system, according to the principle of "planet" gravitational and repulsive force, the research and development idea of developing discharge-type "space flying saucer" is put forward. This paper expounds the reasons why flying saucers have the following characteristics: Flying Saucers can fly at high speed, change direction immediately, hover at any height on the earth, and there is no sound when flying. With the birth of the theoretical system of physics in the 21st century advocated by the author, a era of interstellar "space flying saucer" research will be created. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=planet" title="planet">planet</a>, <a href="https://publications.waset.org/abstracts/search?q=attraction" title=" attraction"> attraction</a>, <a href="https://publications.waset.org/abstracts/search?q=repulsive%20force" title=" repulsive force"> repulsive force</a>, <a href="https://publications.waset.org/abstracts/search?q=balance%20spacing" title=" balance spacing"> balance spacing</a>, <a href="https://publications.waset.org/abstracts/search?q=scientific%20principles" title=" scientific principles"> scientific principles</a>, <a href="https://publications.waset.org/abstracts/search?q=research" title=" research"> research</a>, <a href="https://publications.waset.org/abstracts/search?q=space" title=" space"> space</a>, <a href="https://publications.waset.org/abstracts/search?q=flying%20saucer" title=" flying saucer"> flying saucer</a> </p> <a href="https://publications.waset.org/abstracts/154486/research-on-space-discharge-flying-saucers-cruising-between-planets" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/154486.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">122</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5114</span> Transient Phenomena in a 100 W Hall Thrusters: Experimental Measurements of Discharge Current and Plasma Parameter Evolution</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cl%C3%A9mence%20Royer">Clémence Royer</a>, <a href="https://publications.waset.org/abstracts/search?q=St%C3%A9phane%20Mazouffre"> Stéphane Mazouffre</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nowadays, electric propulsion systems play a crucial role in space exploration missions due to their high specific impulse and long operational life. The Hall thrusters are one of the most mature EP technologies. It is a gridless ion thruster that has proved reliable and high-performance for decades in various space missions. Operation of HT relies on electron emissions through a cathode placed outside a hollow dielectric channel that includes an anode at the back. Negatively charged particles are trapped in a magnetic field and efficiently slow down. By collisions, the electron cloud ionizes xenon atoms. A large electric field is generated in the axial direction due to the low electron transverse mobility in the region of a strong magnetic field. Positive particles are pulled out of the chamber at high velocity and are neutralized directly at the exhaust area. This phenomenon leads to the acceleration of the spacecraft system at a high specific impulse. While HT’s architecture and operating principle are relatively simple, the physics behind thrust is complex and still partly unknown. Current and voltage oscillations, as well as electron properties, have been captured over a 30 mn time period after ignition. The observed low-frequency oscillations exhibited specific frequency ranges, amplitudes, and stability patterns. Correlations between the oscillations and plasma characteristics we analyzed. The impact of these instabilities on thruster performance, including thrust efficiency, has been evaluated as well. Moreover, strategies for mitigating and controlling these instabilities have been developed, such as filtering. In this contribution, in addition to presenting a summary of the results obtained in the transient regime, we will present and discuss recent advances in Hall thruster plasma discharge filtering and control. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electric%20propulsion" title="electric propulsion">electric propulsion</a>, <a href="https://publications.waset.org/abstracts/search?q=Hall%20Thruster" title=" Hall Thruster"> Hall Thruster</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20diagnostics" title=" plasma diagnostics"> plasma diagnostics</a>, <a href="https://publications.waset.org/abstracts/search?q=low-frequency%20oscillations" title=" low-frequency oscillations"> low-frequency oscillations</a> </p> <a href="https://publications.waset.org/abstracts/168470/transient-phenomena-in-a-100-w-hall-thrusters-experimental-measurements-of-discharge-current-and-plasma-parameter-evolution" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/168470.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">90</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">5113</span> Theoretical Investigations and Simulation of Electromagnetic Ion Cyclotron Waves in the Earth’s Magnetosphere Through Magnetospheric Multiscale Mission</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20A.%20Abid">A. A. Abid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Wave-particle interactions are considered to be the paramount in the transmission of energy in collisionless space plasmas, where electromagnetic fields confined the charged particles movement. One of the distinct features of energy transfer in collisionless plasma is wave-particle interaction which is ubiquitous in space plasmas. The three essential populations of the inner magnetosphere are cold plasmaspheric plasmas, ring-currents, and radiation belts high energy particles. The transition region amid such populations initiates wave-particle interactions among distinct plasmas and the wave mode perceived in the magnetosphere is the electromagnetic ion cyclotron (EMIC) wave. These waves can interact with numerous particle species resonantly, accompanied by plasma particle heating is still in debate. In this work we paid particular attention to how EMIC waves impact plasma species, specifically how they affect the heating of electrons and ions during storm and substorm in the Magnetosphere. Using Magnetospheric Multiscale (MMS) mission and electromagnetic hybrid simulation, this project will investigate the energy transfer mechanism (e.g., Landau interactions, bounce resonance interaction, cyclotron resonance interaction, etc.) between EMIC waves and cold-warm plasma populations. Other features such as the production of EMIC waves and the importance of cold plasma particles in EMIC wave-particle interactions will also be worth exploring. Wave particle interactions, electromagnetic hybrid simulation, electromagnetic ion cyclotron (EMIC) waves, Magnetospheric Multiscale (MMS) mission, space plasmas, inner magnetosphere <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MMS" title="MMS">MMS</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetosphere" title=" magnetosphere"> magnetosphere</a>, <a href="https://publications.waset.org/abstracts/search?q=wave%20particle%20interraction" title=" wave particle interraction"> wave particle interraction</a>, <a href="https://publications.waset.org/abstracts/search?q=non-maxwellian%20distribution" title=" non-maxwellian distribution"> non-maxwellian distribution</a> </p> <a href="https://publications.waset.org/abstracts/183636/theoretical-investigations-and-simulation-of-electromagnetic-ion-cyclotron-waves-in-the-earths-magnetosphere-through-magnetospheric-multiscale-mission" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/183636.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">62</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">5112</span> The Effects of Spark Plasma on Infectious Wound Healing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Erfan%20Ghasemi">Erfan Ghasemi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammadreza%20Khani"> Mohammadreza Khani</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamidreza%20Mahmoudi"> Hamidreza Mahmoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Ali%20Nilforoushzadeh"> Mohammad Ali Nilforoushzadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Babak%20Shokri"> Babak Shokri</a>, <a href="https://publications.waset.org/abstracts/search?q=Pouria%20Akbartehrani"> Pouria Akbartehrani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Given the global significance of treating infectious wounds, the goal of this study is to use spark plasma as a new treatment for infectious wounds. To generate spark plasma, a high-voltage (7 kV) and high-frequency (75 kHz) source was used. Infectious wounds in the peritoneum of mice were divided into control and plasma-treated groups at random. The plasma-treated animals received plasma radiation every 4 days for 12 days, for 60 seconds each time. On the 15th day after the first session, the wound in the plasma-treated group had completely healed. The spectra of spark plasma emission and tissue properties were studied. The mechanical resistance of the wound healed in the plasma treatment group was considerably higher than in the control group (p<0.05), according to the findings. Furthermore, histological evidence suggests that wound re-epithelialization is faster in comparison to controls. Angiogenesis and fibrosis (collagen production) were also dramatically boosted in the plasma-treated group, whereas the stage of wound healing inflammation was significantly reduced. Plasma therapy accelerated wound healing by causing considerable wound constriction. The results of this investigation show that spark plasma has an influence on the treatment of infectious wounds. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=infectious%20wounds" title="infectious wounds">infectious wounds</a>, <a href="https://publications.waset.org/abstracts/search?q=mice" title=" mice"> mice</a>, <a href="https://publications.waset.org/abstracts/search?q=spark%20plasma" title=" spark plasma"> spark plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=treatment" title=" treatment"> treatment</a> </p> <a href="https://publications.waset.org/abstracts/140938/the-effects-of-spark-plasma-on-infectious-wound-healing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140938.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">295</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">5111</span> Atmospheric Pressure Microwave Plasma System and Its Applications </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Waqas%20A.%20Toor">Waqas A. Toor</a>, <a href="https://publications.waset.org/abstracts/search?q=Anis%20U.%20Baig"> Anis U. Baig</a>, <a href="https://publications.waset.org/abstracts/search?q=Nuaman%20Shafqat"> Nuaman Shafqat</a>, <a href="https://publications.waset.org/abstracts/search?q=Raafia%20Irfan"> Raafia Irfan</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Ashraf"> Muhammad Ashraf</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A 2.45GHz microwave plasma system and its few applications have been developed. Argon and helium plasma is produced by metallic nozzle and also in a quartz tube at atmospheric pressure, using WR-340 waveguide and its tapered version. The waveguide applicator is also simulated in HFSS and field patterns are analyzed for maximum power absorption in the load. The system is tuned to operate at less than 10% reflected power. Various experimental techniques are used to initiate and sustain the plasma at atmospheric pressure. Plasma of atmospheric air is also produced without using any other shielding gas. The plasma flame is also characterized by its spectrum. Spectral analyses of plasma flame can be used for online analysis of combustion gases produced in industry. The applications of the system include glass and quartz processing, vitrification, emission spectroscopy, plasma coating. Low pressure plasma applications of the system include intense UV light for water purification and ozone generation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=HFSS%20high%20frequency%20structure%20simulator" title="HFSS high frequency structure simulator">HFSS high frequency structure simulator</a>, <a href="https://publications.waset.org/abstracts/search?q=Microwave%20plasma" title=" Microwave plasma"> Microwave plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=UV%20ultraviolet" title=" UV ultraviolet"> UV ultraviolet</a>, <a href="https://publications.waset.org/abstracts/search?q=WR%20rectangular%20waveguide" title=" WR rectangular waveguide"> WR rectangular waveguide</a> </p> <a href="https://publications.waset.org/abstracts/91066/atmospheric-pressure-microwave-plasma-system-and-its-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91066.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">271</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">5110</span> Virtual Practical Work as Formation of Physics Concept for Student</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sepdiana%20W.%20Rahmawati">Sepdiana W. Rahmawati</a>, <a href="https://publications.waset.org/abstracts/search?q=Santi%20A.%20P.%20Anggraini"> Santi A. P. Anggraini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The world of education has made progress with the various new technologies with help of computer. No exception physics education, especially virtual physics practical work. By doing practical work, memory of physics concept will be more advantageous for student and they will understand the essence of actual physics, not only spiked formula. With help of computers, created a variety of applications that can be used by students to perform virtual practical work and students will start thinking systematically to be able find its own concepts and understand the application of physics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=essence%20of%20physics" title="essence of physics">essence of physics</a>, <a href="https://publications.waset.org/abstracts/search?q=formation%20concept" title=" formation concept"> formation concept</a>, <a href="https://publications.waset.org/abstracts/search?q=physics%20concept" title=" physics concept"> physics concept</a>, <a href="https://publications.waset.org/abstracts/search?q=virtual%20practical%20work" title=" virtual practical work"> virtual practical work</a> </p> <a href="https://publications.waset.org/abstracts/39435/virtual-practical-work-as-formation-of-physics-concept-for-student" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/39435.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">406</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">5109</span> Interesting Behavior of Non-Thermal Plasma Photonic Crystals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Mousavi">A. Mousavi</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Sadegzadeh"> S. Sadegzadeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this research, the effect of non-thermal micro plasma with non-Maxwellian distribution function on the one dimensional plasma photonic crystals containing alternate plasma-dielectric layers, has been studied. By using Kronig Penny model, the dispersion relation of electromagnetic modes for such a periodic structure is obtained. In this study we take two plasma photonic crystals with different dielectric layers: the first one with Silicon monoxide named PPCI, and the second one with Tellurium dioxide named PPCII. The effects of the plasma layer thickness and the material of the dielectric layer on the plasma photonic crystal band gaps have been illustrated in the dispersion relation and the group velocity figures. Results revealed that in such a system, the non-thermal plasma exerts stronger limit on the wave’s propagation. In another word, for the non-thermal plasma photonic crystals (NPPC), there are two distinct regions in the dispersion plot. The upper region consists of alternate band gaps in such a way that both width and length of the bands decrease gradually as the band gaps order increases. Whereas in the lower region where v_ph > 20 c (for PPCI), waves will not be allowed to propagate. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=band%20gap" title="band gap">band gap</a>, <a href="https://publications.waset.org/abstracts/search?q=dispersion%20relation" title=" dispersion relation"> dispersion relation</a>, <a href="https://publications.waset.org/abstracts/search?q=non-thermal%20plasma" title=" non-thermal plasma"> non-thermal plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20photonic%20crystal" title=" plasma photonic crystal"> plasma photonic crystal</a> </p> <a href="https://publications.waset.org/abstracts/24618/interesting-behavior-of-non-thermal-plasma-photonic-crystals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24618.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">539</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">5108</span> The Evolution of the Strategic Plasma Industry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zahra%20Ghasemi">Zahra Ghasemi</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatemeh%20Babaei"> Fatemeh Babaei</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Plasma-derived medicinal products are vital categories of biological therapies. These products are used to treat rare, chronic, severe, and life-threatening conditions, such as bleeding disorders (Hemophilia A and B), hemolytic disease of the fetus and newborn, severe infections, burns and liver diseases, and other diseases caused by the absence or malfunction of certain proteins. In addition, they improve the patient’s quality of life. The process of producing plasma-derived medicinal products begins with the collection of human plasma from healthy donors. This initial stage is complex and is monitored with high precision and sensitivity by global authorities to maintain the quality and safety of the final products as well as the health of the donors. The amount of manufactured plasma-derived medicinal products depends on the availability of its raw material, human plasma, so collecting enough plasma for fractionation is essential. Therefore, adopting a suitable national policy regarding plasma donation, establishing collection centers, and increasing public awareness of the importance of plasma donation will improve any country’s conditions regarding the timely and sufficient supply of these medicines. In this study, we tried to briefly examine the importance of sustainability of the plasma industry and its situation in our beloved country of Iran. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plasma" title="plasma">plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=source%20plasma" title=" source plasma"> source plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma-derived%20medicinal%20products" title=" plasma-derived medicinal products"> plasma-derived medicinal products</a>, <a href="https://publications.waset.org/abstracts/search?q=fractionation" title=" fractionation"> fractionation</a> </p> <a href="https://publications.waset.org/abstracts/158132/the-evolution-of-the-strategic-plasma-industry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/158132.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">120</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">5107</span> Wear Resistance of 20MnCr5 Steel Nitrided by Plasma</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Okba%20Belahssen">Okba Belahssen</a>, <a href="https://publications.waset.org/abstracts/search?q=Said%20Benramache"> Said Benramache</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents wear behavior of the plasma-nitrided 20MnCr5 steel. Untreated and plasma nitrided samples were tested. The morphology was observed by scanning electron microscopy (SEM). The plasma nitriding behaviors of 20MnCr5 steel have been assessed by evaluating tribological properties and surface hardness by using a pin-on-disk wear machine and microhardness tester. Experimental results showed that the nitrides ε-Fe2−3N and γ′-Fe4N present in the white layer improve the wear resistance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plasma-nitriding" title="plasma-nitriding">plasma-nitriding</a>, <a href="https://publications.waset.org/abstracts/search?q=alloy%2020mncr5" title=" alloy 20mncr5"> alloy 20mncr5</a>, <a href="https://publications.waset.org/abstracts/search?q=steel" title=" steel"> steel</a>, <a href="https://publications.waset.org/abstracts/search?q=friction" title=" friction"> friction</a>, <a href="https://publications.waset.org/abstracts/search?q=wear" title=" wear"> wear</a> </p> <a href="https://publications.waset.org/abstracts/31284/wear-resistance-of-20mncr5-steel-nitrided-by-plasma" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31284.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">557</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">5106</span> Temperature Calculation for an Atmospheric Pressure Plasma Jet by Optical Emission Spectroscopy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Lee">H. Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Jr."> Jr.</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Bo-ot"> L. Bo-ot</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Tumlos"> R. Tumlos</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Ramos"> H. Ramos</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of the study is to be able to calculate excitation and vibrational temperatures of a 2.45 GHz microwave-induced atmospheric pressure plasma jet. The plasma jet utilizes Argon gas as a primary working gas, while Nitrogen is utilized as a shroud gas for protecting the quartz tube from the plasma discharge. Through Optical Emission Spectroscopy (OES), various emission spectra were acquired from the plasma discharge. Selected lines from Ar I and N2 I emissions were used for the Boltzmann plot technique. The Boltzmann plots yielded values for the excitation and vibrational temperatures. The various values for the temperatures were plotted against varying parameters such as the gas flow rates. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plasma%20jet" title="plasma jet">plasma jet</a>, <a href="https://publications.waset.org/abstracts/search?q=OES" title=" OES"> OES</a>, <a href="https://publications.waset.org/abstracts/search?q=Boltzmann%20plots" title=" Boltzmann plots"> Boltzmann plots</a>, <a href="https://publications.waset.org/abstracts/search?q=vibrational%20temperatures" title=" vibrational temperatures"> vibrational temperatures</a> </p> <a href="https://publications.waset.org/abstracts/12879/temperature-calculation-for-an-atmospheric-pressure-plasma-jet-by-optical-emission-spectroscopy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12879.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">713</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">5105</span> Plasma Systems Application in Treating Automobile Exhaust Gases for a Clean Environment (Case Study)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tahsen%20Abdalwahab%20Ibraheem%20Albehege">Tahsen Abdalwahab Ibraheem Albehege</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Exhaust fuel purification is of great importance to prevent the emission of major pollutants into the atmosphere such as diesel particulates and nitrogen oxides and meet environmental regulations, so environmental impacts are a primary concern of Diesel Exhaust Gas (DEG) which contains hazardous substances harmful to the environment as well as human health.We can not plasma formed through directing electrical energy to create free electrons, which in turn can react with gaseous species, but we can by used to treat engine exhaust gases. . By NO that has been reportedly oxidized to HNO3 and then into ammonium nitrate, and then condensed and removed. In general, thermal plasmas are formed by heating a system to high temperatures 2,000 degrees C, however this can be inefficient and can require extensive thermal management. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plasma%20system%20application" title="plasma system application">plasma system application</a>, <a href="https://publications.waset.org/abstracts/search?q=project%20physics" title=" project physics"> project physics</a>, <a href="https://publications.waset.org/abstracts/search?q=oxidizing%20environment" title=" oxidizing environment"> oxidizing environment</a>, <a href="https://publications.waset.org/abstracts/search?q=electromagnetically" title=" electromagnetically"> electromagnetically</a> </p> <a href="https://publications.waset.org/abstracts/150340/plasma-systems-application-in-treating-automobile-exhaust-gases-for-a-clean-environment-case-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150340.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">99</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">5104</span> Effects of Plasma Treatment on Seed Germination</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yong%20Ho%20Jeon">Yong Ho Jeon</a>, <a href="https://publications.waset.org/abstracts/search?q=Youn%20Mi%20Lee"> Youn Mi Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Yong%20Yoon%20Lee"> Yong Yoon Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Effects of cold plasma treatment on various plant seed germination were studied. The seeds of hot pepper, cucumber, tomato and arabidopsis were exposed to plasma and the plasma was generated in various devices. The germination speed was evaluated compared to an unexposed control. A positive effect on germination speed was observed in all tested seeds but the effects strongly depended on the type of the used plasma device (Argon-DBD, surface-DBD or MARX generator), time of exposure (6s~10min or 1~10shots) and kind of seeds. The SEM images showed that arrays of gold particles along the cell wall were observed on the surface of cucumber seeds showed a germination-accelerating effect by plasma treatment, which was the same as untreated. However, when treated with the high dose plasma, gold particles were not arrayed at the seed surface, it seems that due to the surface etching. This may suggest that the germination is not promoted by etching or damage of surface caused by the plasma treatment. Seedling growth improvement was also observed by indirect plasma treatment. These lead to an important conclusion that the effect of charged particles on plasma play the essential role in plant germination and indirect plasma treatment offers new perspectives for large scale application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cold%20plasma" title="cold plasma">cold plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=cucumber" title=" cucumber"> cucumber</a>, <a href="https://publications.waset.org/abstracts/search?q=germination" title=" germination"> germination</a>, <a href="https://publications.waset.org/abstracts/search?q=SEM" title=" SEM "> SEM </a> </p> <a href="https://publications.waset.org/abstracts/49540/effects-of-plasma-treatment-on-seed-germination" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49540.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">315</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">5103</span> Contribution of Exchange-correlation Effects on Weakly Relativistic Plasma Expansion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rachid%20Fermous">Rachid Fermous</a>, <a href="https://publications.waset.org/abstracts/search?q=Rima%20Mebrek"> Rima Mebrek</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Plasma expansion is an important physical process that takes place in laser interactions with solid targets. Within a self-similar model for the hydrodynamic multi-fluid equations, we investigated the expansion of dense plasma. The weakly relativistic electrons are produced by ultra-intense laser pulses, while ions are supposed to be in a non-relativistic regime. It is shown that dense plasma expansion is found to be governed mainly by quantum contributions in the fluid equations that originate from the degenerate pressure in addition to the nonlinear contributions from exchange and correlation potentials. The quantum degeneracy parameter proﬁle provides clues to set the limit between under-dense and dense relativistic plasma expansions at a given density and temperature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plasma%20expansion" title="plasma expansion">plasma expansion</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20degeneracy" title=" quantum degeneracy"> quantum degeneracy</a>, <a href="https://publications.waset.org/abstracts/search?q=weakly%20relativistic" title=" weakly relativistic"> weakly relativistic</a>, <a href="https://publications.waset.org/abstracts/search?q=under-dense%20%20plasma" title=" under-dense plasma"> under-dense plasma</a> </p> <a href="https://publications.waset.org/abstracts/167933/contribution-of-exchange-correlation-effects-on-weakly-relativistic-plasma-expansion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167933.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">86</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">5102</span> A Deep Explanation for the Formation of Force as a Foundational Law of Physics by Incorporating Unknown Degrees of Freedom into Space</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohsen%20Farshad">Mohsen Farshad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Information and force definition has been intertwined with the concept of entropy for many years. The displacement information of degrees of freedom with Brownian motions at a given temperature in space emerges as an entropic force between species. Here, we use this concept of entropy to understand the underlying physics behind the formation of attractive and repulsive forces by imagining that space is filled with free Brownian degrees of freedom. We incorporate the radius of bodies and the distance between them into entropic force relation systematically. Using this modified gravitational entropic force, we derive the attractive entropic force between bodies without considering their spin. We further hypothesize a possible mechanism for the formation of the repulsive force between two bodies. We visually elaborate that the repulsive entropic force will be manifested through the rotation of degrees of freedom around the spinning particles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=entropy" title="entropy">entropy</a>, <a href="https://publications.waset.org/abstracts/search?q=information" title=" information"> information</a>, <a href="https://publications.waset.org/abstracts/search?q=force" title=" force"> force</a>, <a href="https://publications.waset.org/abstracts/search?q=Brownian%20Motions" title=" Brownian Motions"> Brownian Motions</a> </p> <a href="https://publications.waset.org/abstracts/150175/a-deep-explanation-for-the-formation-of-force-as-a-foundational-law-of-physics-by-incorporating-unknown-degrees-of-freedom-into-space" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150175.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">76</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5101</span> Axiomatic Systems as an Alternative to Teach Physics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Liliana%20M.%20Marinelli">Liliana M. Marinelli</a>, <a href="https://publications.waset.org/abstracts/search?q=Cristina%20T.%20Varanese"> Cristina T. Varanese</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the last few years, students from higher education have difficulties in grasping mathematical concepts which support physical matters, especially those in the first years of this education. Classical Physics teaching turns to be complex when students are not able to make use of mathematical tools which lead to the conceptual structure of Physics. When derivation and integration rules are not used or developed in parallel with other disciplines, the physical meaning that we attempt to convey turns to be complicated. Due to this fact, it could be of great use to see the Classical Mechanics from an axiomatic approach, where the correspondence rules give physical meaning, if we expect students to understand concepts clearly and accurately. Using the Minkowski point of view adapted to a two-dimensional space and time where vectors, matrices, and straight lines (worked from an affine space) give mathematical and physical rigorosity even when it is more abstract. An interesting option would be to develop the disciplinary contents from an axiomatic version which embraces the Classical Mechanics as a particular case of Relativistic Mechanics. The observation about the increase in the difficulties stated by students in the first years of education allows this idea to grow as a possible option to improve performance and understanding of the concepts of this subject. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=axioms" title="axioms">axioms</a>, <a href="https://publications.waset.org/abstracts/search?q=classical%20physics" title=" classical physics"> classical physics</a>, <a href="https://publications.waset.org/abstracts/search?q=physical%20concepts" title=" physical concepts"> physical concepts</a>, <a href="https://publications.waset.org/abstracts/search?q=relativity" title=" relativity"> relativity</a> </p> <a href="https://publications.waset.org/abstracts/46849/axiomatic-systems-as-an-alternative-to-teach-physics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46849.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">306</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">5100</span> Investigation of Complexity Dynamics in a DC Glow Discharge Magnetized Plasma Using Recurrence Quantification Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vramori%20Mitra">Vramori Mitra</a>, <a href="https://publications.waset.org/abstracts/search?q=Bornali%20Sarma"> Bornali Sarma</a>, <a href="https://publications.waset.org/abstracts/search?q=Arun%20K.%20Sarma"> Arun K. Sarma</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recurrence is a ubiquitous feature of any real dynamical system. The states in phase space trajectory of a system have an inherent tendency to return to the same state or its close state after certain time laps. Recurrence quantification analysis technique, based on this fundamental feature of a dynamical system, detects evaluation of state under variation of control parameter of the system. The paper presents the investigation of nonlinear dynamical behavior of plasma floating potential fluctuations obtained by using a Langmuir probe in different magnetic field under the variation of discharge voltages. The main measures of recurrence quantification analysis are considered as determinism, linemax and entropy. The increment of the DET and linemax variables asserts that the predictability and periodicity of the system is increasing. The variable linemax indicates that the chaoticity is being diminished with the slump of magnetic field while increase of magnetic field enhancing the chaotic behavior. Fractal property of the plasma time series estimated by DFA technique (Detrended fluctuation analysis) reflects that long-range correlation of plasma fluctuations is decreasing while fractal dimension is increasing with the enhancement of magnetic field which corroborates the RQA analysis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=detrended%20fluctuation%20analysis" title="detrended fluctuation analysis">detrended fluctuation analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=chaos" title=" chaos"> chaos</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20space" title=" phase space"> phase space</a>, <a href="https://publications.waset.org/abstracts/search?q=recurrence" title=" recurrence"> recurrence</a> </p> <a href="https://publications.waset.org/abstracts/42471/investigation-of-complexity-dynamics-in-a-dc-glow-discharge-magnetized-plasma-using-recurrence-quantification-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42471.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">328</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">5099</span> Failure Analysis of Electrode, Nozzle Plate, and Powder Injector during Air Plasma Spray Coating</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nemes%20Alexandra">Nemes Alexandra</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of the research is to develop an optimum microstructure of steel coatings on aluminum surfaces for application on the crankcase cylinder bores. For the proper design of the microstructure of the coat, it is important to control the plasma gun unit properly. The maximum operating time was determined while the plasma gun could optimally work before its destruction. Objectives: The aim of the research is to determine the optimal operating time of the plasma gun between renovations (the renovation shall involve the replacement of the test components of the plasma gun: electrode, nozzle plate, powder injector. Methodology: Plasma jet and particle flux analysis with PFI (PFI is a diagnostic tool for all kinds of thermal spraying processes), CT reconstruction and analysis on the new and the used plasma guns, failure analysis of electrodes, nozzle plates, and powder injectors, microscopic examination of the microstructure of the coating. Contributions: As the result of the failure analysis detailed above, the use of the plasma gun was maximized at 100 operating hours in order to get optimal microstructure for the coat. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=APS" title="APS">APS</a>, <a href="https://publications.waset.org/abstracts/search?q=air%20plasma%20spray" title=" air plasma spray"> air plasma spray</a>, <a href="https://publications.waset.org/abstracts/search?q=failure%20analysis" title=" failure analysis"> failure analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=electrode" title=" electrode"> electrode</a>, <a href="https://publications.waset.org/abstracts/search?q=nozzle%20plate" title=" nozzle plate"> nozzle plate</a>, <a href="https://publications.waset.org/abstracts/search?q=powder%20injector" title=" powder injector"> powder injector</a> </p> <a href="https://publications.waset.org/abstracts/151362/failure-analysis-of-electrode-nozzle-plate-and-powder-injector-during-air-plasma-spray-coating" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151362.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">5098</span> A Study on the Water and Oil Repellency Characteristics of Plasma-Treated Pet and Pet/Elastane Fabrics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mehtap%20%C3%87al%C4%B1%C5%9Fkan">Mehtap Çalışkan</a>, <a href="https://publications.waset.org/abstracts/search?q=Nil%C3%BCfer%20Y%C4%B1ld%C4%B1z%20Varan"> Nilüfer Yıldız Varan</a>, <a href="https://publications.waset.org/abstracts/search?q=Volkan%20Kaplan"> Volkan Kaplan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> New orientations have emerged in the textile sector as a result of increasing global competition and environmental problems. Under the scope of new understandings, it is required to bring forward multi-functional, simple and environmentally friendly methods that will meet tight economic and ecological demands of today. Plasma technology has become a significant alternative in this sense. This technology may provide great advantages in case it is developed, however, it does not receive adequate consideration. In this study, plasma treatment was applied by using glow discharge plasma system to 100% polyethylene terephthalate (PET) and 95% PET/5% elastane fabrics and then the effects of plasma polymerization on fabric surface was tested and analyzed using water and oil repellent finishes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plasma" title="plasma">plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=polyester" title=" polyester"> polyester</a>, <a href="https://publications.waset.org/abstracts/search?q=elastane" title=" elastane"> elastane</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20repellency" title=" water repellency"> water repellency</a>, <a href="https://publications.waset.org/abstracts/search?q=oil%20repellency" title=" oil repellency"> oil repellency</a> </p> <a href="https://publications.waset.org/abstracts/73125/a-study-on-the-water-and-oil-repellency-characteristics-of-plasma-treated-pet-and-petelastane-fabrics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73125.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">323</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=space%20plasma%20physics&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=space%20plasma%20physics&page=3">3</a></li> <li class="page-item"><a class="page-link" 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