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magnetic bearing</title> <meta name="description" content="Search results for: active magnetic bearing"> <meta name="keywords" content="active magnetic bearing"> <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="active magnetic bearing"> <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> 5691</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: active magnetic bearing</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5691</span> Stabilization of a Three-Pole Active Magnetic Bearing by Hybrid Control Method in Static Mode</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahdi%20Kiani">Mahdi Kiani</a>, <a href="https://publications.waset.org/abstracts/search?q=Hassan%20Salarieh"> Hassan Salarieh</a>, <a href="https://publications.waset.org/abstracts/search?q=Aria%20Alasty"> Aria Alasty</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Mahdi%20Darbandi"> S. Mahdi Darbandi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The design and implementation of the hybrid control method for a three-pole active magnetic bearing (AMB) is proposed in this paper. The system is inherently nonlinear and conventional nonlinear controllers are a little complicated, while the proposed hybrid controller has a piecewise linear form, i.e. linear in each sub-region. A state-feedback hybrid controller is designed in this study, and the unmeasurable states are estimated by an observer. The gains of the hybrid controller are obtained by the Linear Quadratic Regulator (LQR) method in each sub-region. To evaluate the performance, the designed controller is implemented on an experimental setup in static mode. The experimental results show that the proposed method can efficiently stabilize the three-pole AMB system. The simplicity of design, domain of attraction, uncomplicated control law, and computational time are advantages of this method over other nonlinear control strategies in AMB systems. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20magnetic%20bearing" title="active magnetic bearing">active magnetic bearing</a>, <a href="https://publications.waset.org/abstracts/search?q=three%20pole%20AMB" title=" three pole AMB"> three pole AMB</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20control" title=" hybrid control"> hybrid control</a>, <a href="https://publications.waset.org/abstracts/search?q=Lyapunov%20function" title=" Lyapunov function"> Lyapunov function</a> </p> <a href="https://publications.waset.org/abstracts/53804/stabilization-of-a-three-pole-active-magnetic-bearing-by-hybrid-control-method-in-static-mode" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53804.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">341</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5690</span> Vibration Control of a Horizontally Supported Rotor System by Using a Radial Active Magnetic Bearing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vishnu%20A.">Vishnu A.</a>, <a href="https://publications.waset.org/abstracts/search?q=Ashesh%20Saha"> Ashesh Saha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The operation of high-speed rotating machinery in industries is accompanied by rotor vibrations due to many factors. One of the primary instability mechanisms in a rotor system is the centrifugal force induced due to the eccentricity of the center of mass away from the center of rotation. These unwanted vibrations may lead to catastrophic fatigue failure. So, there is a need to control these rotor vibrations. In this work, control of rotor vibrations by using a 4-pole Radial Active Magnetic Bearing (RAMB) as an actuator is analysed. A continuous rotor system model is considered for the analysis. Several important factors, like the gyroscopic effect and rotary inertia of the shaft and disc, are incorporated into this model. The large deflection of the shaft and the restriction to axial motion of the shaft at the bearings result in nonlinearities in the system governing equation. The rotor system is modeled in such a way that the system dynamics can be related to the geometric and material properties of the shaft and disc. The mathematical model of the rotor system is developed by incorporating the control forces generated by the RAMB. A simple PD controller is used for the attenuation of system vibrations. An analytical expression for the amplitude and phase equations is derived using the Method of Multiple Scales (MMS). Analytical results are verified with the numerical results obtained using an ‘ode’ solver in-built into MATLAB Software. The control force is found to be effective in attenuating the system vibrations. The multi-valued solutions leading to the jump phenomenon are also eliminated with a proper choice of control gains. Most interestingly, the shape of the backbone curves can also be altered for certain values of control parameters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rotor%20dynamics" title="rotor dynamics">rotor dynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=continuous%20rotor%20system%20model" title=" continuous rotor system model"> continuous rotor system model</a>, <a href="https://publications.waset.org/abstracts/search?q=active%20magnetic%20bearing" title=" active magnetic bearing"> active magnetic bearing</a>, <a href="https://publications.waset.org/abstracts/search?q=PD%20controller" title=" PD controller"> PD controller</a>, <a href="https://publications.waset.org/abstracts/search?q=method%20of%20multiple%20scales" title=" method of multiple scales"> method of multiple scales</a>, <a href="https://publications.waset.org/abstracts/search?q=backbone%20curve" title=" backbone curve"> backbone curve</a> </p> <a href="https://publications.waset.org/abstracts/162558/vibration-control-of-a-horizontally-supported-rotor-system-by-using-a-radial-active-magnetic-bearing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162558.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">79</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5689</span> Comparison of the Dynamic Characteristics of Active and Passive Hybrid Bearings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Denis%20V.%20Shutin">Denis V. Shutin</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexander%20Yu.%20Babin"> Alexander Yu. Babin</a>, <a href="https://publications.waset.org/abstracts/search?q=Leonid%20A.%20Savin"> Leonid A. Savin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the ways of reducing vibroactivity of rotor systems is to apply active hybrid bearings. Their design allows correction of the rotor’s location by means of separately controlling the supply pressure of the lubricant into the friction area. In a most simple case, the control system is based on a P-regulator. Increase of the gain coefficient allows decreasing the amplitude of rotor’s vibrations. The same effect can be achieved by means of increasing the pressure in the collector of a traditional passive hybrid bearing. However, these approaches affect the dynamic characteristics of the bearing differently. Theoretical studies show that the increase of the gain coefficient of an active bearing increases the stiffness of the bearing, as well as the increase of the pressure in the collector. Nevertheless, in case of a passive bearing, the damping properties deteriorate, whereas the active hybrid bearings obtain higher damping properties, which allow effectively providing the energy dissipation of the rotor vibrations and reducing the load on the constructional elements of a machine. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20bearings" title="active bearings">active bearings</a>, <a href="https://publications.waset.org/abstracts/search?q=control%20system" title=" control system"> control system</a>, <a href="https://publications.waset.org/abstracts/search?q=damping" title=" damping"> damping</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20bearings" title=" hybrid bearings"> hybrid bearings</a>, <a href="https://publications.waset.org/abstracts/search?q=stiffness" title=" stiffness"> stiffness</a> </p> <a href="https://publications.waset.org/abstracts/47442/comparison-of-the-dynamic-characteristics-of-active-and-passive-hybrid-bearings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47442.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">5688</span> Design and Analysis of Shielding Magnetic Field for Active Space Radiation Protection</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chaoyan%20Huang">Chaoyan Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Hongxia%20Zheng"> Hongxia Zheng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> For deep space exploration and long duration interplanetary manned missions, protection of astronauts from cosmic radiation is an unavoidable problem. However, passive shielding can be little effective for protecting particles which energies are greater than 1GeV/nucleon. In this study, active magnetic protection method is adopted. Taking into account the structure and size of the end-cap, eight shielding magnetic field configurations are designed based on the Hoffman configuration. The shielding effect of shielding magnetic field structure, intensity B and thickness L on H particles with 2GeV energy is compared by test particle simulation. The result shows that the shielding effect is better with the linear type magnetic field structure in the end-cap region. Furthermore, two magnetic field configurations with better shielding effect are investigated through H and He galactic cosmic spectra. And the shielding effect of the linear type configuration adopted in the barrel and end-cap regions is best. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=galactic%20cosmic%20rays" title="galactic cosmic rays">galactic cosmic rays</a>, <a href="https://publications.waset.org/abstracts/search?q=active%20protection" title=" active protection"> active protection</a>, <a href="https://publications.waset.org/abstracts/search?q=shielding%20magnetic%20field%20configuration" title=" shielding magnetic field configuration"> shielding magnetic field configuration</a>, <a href="https://publications.waset.org/abstracts/search?q=shielding%20effect" title=" shielding effect"> shielding effect</a> </p> <a href="https://publications.waset.org/abstracts/108740/design-and-analysis-of-shielding-magnetic-field-for-active-space-radiation-protection" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/108740.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">144</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5687</span> A Review on Bearing Capacity Factor Nγ of Foundations with Different Shapes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20Ziaie%20Moayed">R. Ziaie Moayed</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Taghvamanesh"> S. Taghvamanesh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> So far several methods by different researchers have been developed in order to calculate the bearing capacity factors of foundations and retaining walls. In this paper, the bearing capacity factor Ny (shape factor) for different types of foundation have been investigated. The formula for bearing capacity on c–φ–γ soil can still be expressed by Terzaghi’s equation except that the bearing capacity factor Ny depends on the surcharge ratio, and friction angle φ. Many empirical definitions have been used for measurement of the bearing capacity factors N <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bearing%20capacity" title="bearing capacity">bearing capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=bearing%20capacity%20factor%20N%CE%B3" title=" bearing capacity factor Nγ"> bearing capacity factor Nγ</a>, <a href="https://publications.waset.org/abstracts/search?q=irregular%20foundations" title=" irregular foundations"> irregular foundations</a>, <a href="https://publications.waset.org/abstracts/search?q=shape%20factor" title=" shape factor"> shape factor</a> </p> <a href="https://publications.waset.org/abstracts/134905/a-review-on-bearing-capacity-factor-ngh-of-foundations-with-different-shapes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134905.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">5686</span> Evaluating of Bearing Capacity of Two Adjacent Strip Foundations Located around a Soil Slip </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Meftahi">M. Meftahi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Hoseinzadeh"> M. Hoseinzadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Naeini"> S. A. Naeini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Selection of soil bearing capacity is an important issue that should be investigated under different conditions. The bearing capacity of foundation around of soil slope is based on the active and passive forces. On the other hand, due to extension of urban structures, it is inevitable to put the foundations together. Concerning the two cases mentioned above, investigating the behavior of adjacent foundations which are constructed besides soil slope is essential. It should be noted that, according to the conditions, the bearing capacity of adjacent foundations can be less or more than mat foundations. Also, soil reinforcement increases the bearing capacity of adjacent foundations, and the amount of its increase depends on the distance between foundations. In this research, based on numerical studies, a method is presented for evaluating ultimate bearing capacity of adjacent foundations at different intervals. In the present study, the effect of foundation width, the center to center distance of adjacent foundations and reinforced soil has been investigated on the bearing capacity of adjacent foundations beside soil slope. The results indicate that, due to interference of failure surfaces created under foundation, it depends on their intervals and the ultimate bearing capacity of foundation varies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adjacent%20foundation" title="adjacent foundation">adjacent foundation</a>, <a href="https://publications.waset.org/abstracts/search?q=bearing%20capacity" title=" bearing capacity"> bearing capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforcements" title=" reinforcements"> reinforcements</a>, <a href="https://publications.waset.org/abstracts/search?q=settlement" title=" settlement"> settlement</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20analysis" title=" numerical analysis"> numerical analysis</a> </p> <a href="https://publications.waset.org/abstracts/107540/evaluating-of-bearing-capacity-of-two-adjacent-strip-foundations-located-around-a-soil-slip" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/107540.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">169</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5685</span> Design Development and Qualification of a Magnetically Levitated Blower for C0₂ Scrubbing in Manned Space Missions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Larry%20Hawkins">Larry Hawkins</a>, <a href="https://publications.waset.org/abstracts/search?q=Scott%20K.%20Sakakura"> Scott K. Sakakura</a>, <a href="https://publications.waset.org/abstracts/search?q=Michael%20J.%20Salopek"> Michael J. Salopek</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Marshall Space Flight Center is designing and building a next-generation CO₂ removal system, the Four Bed Carbon Dioxide Scrubber (4BCO₂), which will use the International Space Station (ISS) as a testbed. The current ISS CO2 removal system has faced many challenges in both performance and reliability. Given that CO2 removal is an integral Environmental Control and Life Support System (ECLSS) subsystem, the 4BCO2 Scrubber has been designed to eliminate the shortfalls identified in the current ISS system. One of the key required upgrades was to improve the performance and reliability of the blower that provides the airflow through the CO₂ sorbent beds. A magnetically levitated blower, capable of higher airflow and pressure than the previous system, was developed to meet this need. The design and qualification testing of this next-generation blower are described here. The new blower features a high-efficiency permanent magnet motor, a five-axis, active magnetic bearing system, and a compact controller containing both a variable speed drive and a magnetic bearing controller. The blower uses a centrifugal impeller to pull air from the inlet port and drive it through an annular space around the motor and magnetic bearing components to the exhaust port. Technical challenges of the blower and controller development include survival of the blower system under launch random vibration loads, operation in microgravity, packaging under strict size and weight requirements, and successful operation during 4BCO₂ operational changeovers. An ANSYS structural dynamic model of the controller was used to predict response to the NASA defined random vibration spectrum and drive minor design changes. The simulation results are compared to measurements from qualification testing the controller on a vibration table. Predicted blower performance is compared to flow loop testing measurements. Dynamic response of the system to valve changeovers is presented and discussed using high bandwidth measurements from dynamic pressure probes, magnetic bearing position sensors, and actuator coil currents. The results presented in the paper show that the blower controller will survive launch vibration levels, the blower flow meets the requirements, and the magnetic bearings have adequate load capacity and control bandwidth to maintain the desired rotor position during the valve changeover transients. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=blower" title="blower">blower</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20dioxide%20removal" title=" carbon dioxide removal"> carbon dioxide removal</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20control%20and%20life%20support%20system" title=" environmental control and life support system"> environmental control and life support system</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20bearing" title=" magnetic bearing"> magnetic bearing</a>, <a href="https://publications.waset.org/abstracts/search?q=permanent%20magnet%20motor" title=" permanent magnet motor"> permanent magnet motor</a>, <a href="https://publications.waset.org/abstracts/search?q=validation%20testing" title=" validation testing"> validation testing</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration" title=" vibration"> vibration</a> </p> <a href="https://publications.waset.org/abstracts/111462/design-development-and-qualification-of-a-magnetically-levitated-blower-for-c02-scrubbing-in-manned-space-missions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/111462.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">135</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5684</span> A Multi-Objective Optimization Tool for Dual-Mode Operating Active Magnetic Regenerator Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anna%20Ouskova%20Leonteva">Anna Ouskova Leonteva</a>, <a href="https://publications.waset.org/abstracts/search?q=Michel%20Risser"> Michel Risser</a>, <a href="https://publications.waset.org/abstracts/search?q=Anne%20Jeannin-Girardon"> Anne Jeannin-Girardon</a>, <a href="https://publications.waset.org/abstracts/search?q=Pierre%20Parrend"> Pierre Parrend</a>, <a href="https://publications.waset.org/abstracts/search?q=Pierre%20Collet"> Pierre Collet</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper proposes an efficient optimization tool for an active magnetic regenerator (AMR) model, operating in two modes: magnetic refrigeration system (MRS) and thermo-magnetic generator (TMG). The aim of this optimizer is to improve the design of the AMR by applying a multi-physics multi-scales numerical model as a core of evaluation functions to achieve industrial requirements for refrigeration and energy conservation systems. Based on the multi-objective non-dominated sorting genetic algorithm 3 (NSGA3), it maximizes four different objectives: efficiency and power density for MRS and TMG. The main contribution of this work is in the simultaneously application of a CPU-parallel NSGA3 version to the AMR model in both modes for studying impact of control and design parameters on the performance. The parametric study of the optimization results are presented. The main conclusion is that the common (for TMG and MRS modes) optimal parameters can be found by the proposed tool. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ecological%20refrigeration%20systems" title="ecological refrigeration systems">ecological refrigeration systems</a>, <a href="https://publications.waset.org/abstracts/search?q=active%20magnetic%20regenerator" title=" active magnetic regenerator"> active magnetic regenerator</a>, <a href="https://publications.waset.org/abstracts/search?q=thermo-magnetic%20generator" title=" thermo-magnetic generator"> thermo-magnetic generator</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-objective%20evolutionary%20optimization" title=" multi-objective evolutionary optimization"> multi-objective evolutionary optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=industrial%20optimization%20problem" title=" industrial optimization problem"> industrial optimization problem</a>, <a href="https://publications.waset.org/abstracts/search?q=real-world%20application" title=" real-world application"> real-world application</a> </p> <a href="https://publications.waset.org/abstracts/134949/a-multi-objective-optimization-tool-for-dual-mode-operating-active-magnetic-regenerator-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134949.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">114</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5683</span> Experimental Challenges and Solutions in Design and Operation of the Test Rig for Water Lubricated Journal Bearing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ravindra%20Mallya">Ravindra Mallya</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Satish%20Shenoy"> B. Satish Shenoy</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Raghuvir%20Pai"> B. Raghuvir Pai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study deals with the challenges in developing a test rig to test the performance of water lubricated journal bearing. The test rig is designed to simulate the working conditions of the bearing in order to understand their performance before they are put in operation. The bearing that is studied is the commercially available water lubricated bearing which has a rubber liner bonded with a rigid metal shell. The lubricant enters the bearing axially through a pressurized inlet tank and exits to an outlet tank which is at sufficiently low pressure. The load on the bearing is applied through the dead weight system which acts both in upward and downward direction so that net load acts on the bearing. The issues in feeding the lubricant into the bearing from the inlet side and preventing the leakage of the lubricant is discussed. The application of the load on the test bearing while maintaining the bearing afloat is also discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=axial%20groove" title="axial groove">axial groove</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20pressure" title=" hydrodynamic pressure"> hydrodynamic pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=journal%20bearing" title=" journal bearing"> journal bearing</a>, <a href="https://publications.waset.org/abstracts/search?q=test%20rig" title=" test rig"> test rig</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20lubrication" title=" water lubrication"> water lubrication</a> </p> <a href="https://publications.waset.org/abstracts/15451/experimental-challenges-and-solutions-in-design-and-operation-of-the-test-rig-for-water-lubricated-journal-bearing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15451.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">502</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5682</span> Magnetic Nanoparticles for Cancer Therapy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sachinkumar%20Patil">Sachinkumar Patil</a>, <a href="https://publications.waset.org/abstracts/search?q=Sonali%20Patil"> Sonali Patil</a>, <a href="https://publications.waset.org/abstracts/search?q=Shitalkumar%20Patil"> Shitalkumar Patil</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nanoparticles played important role in the biomedicine. New advanced methods having great potential apllication in the diagnosis and therapy of cancer. Now a day’s magnetic nanoparticles used in cancer therapy. Cancer is the major disease causes death. Magnetic nanoparticles show response to the magnetic field on the basis of this property they are used in cancer therapy. Cancer treated with hyperthermia by using magnetic nanoparticles it is unconventional but more safe and effective method. Magnetic nanoparticles prepared by using different innovative techniques that makes particles in uniform size and desired effect. Magnetic nanoparticles already used as contrast media in magnetic resonance imaging. A magnetic nanoparticle has been great potential application in cancer diagnosis and treatment as well as in gene therapy. In this review we will discuss the progress in cancer therapy based on magnetic nanoparticles, mainly including magnetic hyperthermia, synthesis and characterization of magnetic nanoparticles, mechanism of magnetic nanoparticles and application of magnetic nanoparticles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetic%20nanoparticles" title="magnetic nanoparticles">magnetic nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=synthesis" title=" synthesis"> synthesis</a>, <a href="https://publications.waset.org/abstracts/search?q=characterization" title=" characterization"> characterization</a>, <a href="https://publications.waset.org/abstracts/search?q=cancer%20therapy" title=" cancer therapy"> cancer therapy</a>, <a href="https://publications.waset.org/abstracts/search?q=hyperthermia" title=" hyperthermia"> hyperthermia</a>, <a href="https://publications.waset.org/abstracts/search?q=application" title=" application"> application</a> </p> <a href="https://publications.waset.org/abstracts/31421/magnetic-nanoparticles-for-cancer-therapy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31421.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">639</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5681</span> Numerical Study on the Static Characteristics of Novel Aerostatic Thrust Bearings Possessing Elastomer Capillary Restrictor and Bearing Surface</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20W.%20Lo">S. W. Lo</a>, <a href="https://publications.waset.org/abstracts/search?q=S.-H.%20Lu"> S.-H. Lu</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20H.%20Guo"> Y. H. Guo</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20C.%20Hsu"> L. C. Hsu </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, a novel design of aerostatic thrust bearing is proposed and is analyzed numerically. The capillary restrictor and bearing disk are made of elastomer like silicone and PU. The viscoelasticity of elastomer helps the capillary expand for more air flux and at the same time, allows conicity of the bearing surface to form when the air pressure is enhanced. Therefore, the bearing has the better ability of passive compensation. In the present example, as compared with the typical model, the new designs can nearly double the load capability and offer four times static stiffness. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aerostatic" title="aerostatic">aerostatic</a>, <a href="https://publications.waset.org/abstracts/search?q=bearing" title=" bearing"> bearing</a>, <a href="https://publications.waset.org/abstracts/search?q=elastomer" title=" elastomer"> elastomer</a>, <a href="https://publications.waset.org/abstracts/search?q=static%20stiffness" title=" static stiffness"> static stiffness</a> </p> <a href="https://publications.waset.org/abstracts/7954/numerical-study-on-the-static-characteristics-of-novel-aerostatic-thrust-bearings-possessing-elastomer-capillary-restrictor-and-bearing-surface" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7954.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">377</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5680</span> Geophysical Mapping of the Groundwater Aquifer System in Gode Area, Northeastern Hosanna, Ethiopia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Esubalew%20Yehualaw%20Melaku">Esubalew Yehualaw Melaku</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, two basic geophysical methods are applied for mapping the groundwater aquifer system in the Gode area along the Guder River, northeast of Hosanna town, near the western margin of the Central Main Ethiopian Rift. The main target of the study is to map the potential aquifer zone and investigate the groundwater potential for current and future development of the resource in the Gode area. The geophysical methods employed in this study include, Vertical Electrical Sounding (VES) and magnetic survey techniques. Electrical sounding was used to examine and map the depth to the potential aquifer zone of the groundwater and its distribution over the area. On the other hand, a magnetic survey was used to delineate contact between lithologic units and geological structures. The 2D magnetic modeling and the geoelectric sections are used for the identification of weak zones, which control the groundwater flow and storage system. The geophysical survey comprises of twelve VES readings collected by using a Schlumberger array along six profile lines and more than four hundred (400) magnetic readings at about 10m station intervals along four profiles and 20m along three random profiles. The study result revealed that the potential aquifer in the area is obtained at a depth range from 45m to 92m. This is the response of the highly weathered/ fractured ignimbrite and pumice layer with sandy soil, which is the main water-bearing horizon. Overall, in the neighborhood of four VES points, VES- 2, VES- 3, VES-10, and VES-11, shows good water-bearing zones in the study area. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vertical%20electrical%20sounding" title="vertical electrical sounding">vertical electrical sounding</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20survey" title=" magnetic survey"> magnetic survey</a>, <a href="https://publications.waset.org/abstracts/search?q=aquifer" title=" aquifer"> aquifer</a>, <a href="https://publications.waset.org/abstracts/search?q=groundwater%20potential" title=" groundwater potential"> groundwater potential</a> </p> <a href="https://publications.waset.org/abstracts/158684/geophysical-mapping-of-the-groundwater-aquifer-system-in-gode-area-northeastern-hosanna-ethiopia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/158684.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">127</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5679</span> Functionalized Magnetic Iron Oxide Nanoparticles for Extraction of Protein and Metal Nanoparticles from Complex Fluids</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meenakshi%20Verma">Meenakshi Verma</a>, <a href="https://publications.waset.org/abstracts/search?q=Mandeep%20Singh%20Bakshi"> Mandeep Singh Bakshi</a>, <a href="https://publications.waset.org/abstracts/search?q=Kultar%20Singh"> Kultar Singh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Magnetic nanoparticles have received incredible importance in view of their diverse applications, which arise primarily due to their response to the external magnetic field. The magnetic behaviour of magnetic nanoparticles (NPs) helps them in numerous different ways. The most important amongst them is the ease with which they can be purified and also can be separated from the media in which they are present merely by applying an external magnetic field. This exceptional ease of separation of the magnetic NPs from an aqueous media enables them to use for extracting/removing metal pollutants from complex aqueous medium. Functionalized magnetic NPs can be subjected for the metallic impurities extraction if are favourably adsorbed on the NPs surfaces. We have successfully used the magnetic NPs as vehicles for gold and silver NPs removal from the complex fluids. The NPs loaded with gold and silver NPs pollutant fractions has been easily removed from the aqueous media by using external magnetic field. Similarly, we have used the magnetic NPs for extraction of protein from complex media and then constantly washed with pure water to eliminate the unwanted surface adsorbed components for quantitative estimation. The purified and protein loaded magnetic NPs are best analyzed with SDS Page to not only for characterization but also for separating the protein fractions. A collective review of the results indicates that we have synthesized surfactant coated iron oxide NPs and then functionalized these with selected materials. These surface active magnetic NPs work very well for the extraction of metallic NPs from the aqueous bulk and make the whole process environmentally sustainable. Also, magnetic NPs-Au/Ag/Pd hybrids have excellent protein extracting properties. They are much easier to use in order to extract the magnetic impurities as well as protein fractions under the effect of external magnetic field without any complex conventional purification methods. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetic%20nanoparticles" title="magnetic nanoparticles">magnetic nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=protein" title=" protein"> protein</a>, <a href="https://publications.waset.org/abstracts/search?q=functionalized" title=" functionalized"> functionalized</a>, <a href="https://publications.waset.org/abstracts/search?q=extraction" title=" extraction"> extraction</a> </p> <a href="https://publications.waset.org/abstracts/122882/functionalized-magnetic-iron-oxide-nanoparticles-for-extraction-of-protein-and-metal-nanoparticles-from-complex-fluids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/122882.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">5678</span> Reduced Vibration in a Levitating Motor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Kazadi">S. Kazadi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20An"> A. An</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Shen"> B. Shen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We investigate the fitness of a male and female permanent magnetic levitation support for use as an axle on a rotor for a levitating motor. The support enables passive thrust and axial support for the axle as a result of the unique arrangement of permanent magnets. As the axial and thrust bearing aspects are derived from magnetic repulsion, it is not immediately clear that the repulsion is stiff enough to enable even low power motors. This paper describes the design and performance of two low power motors based on the magnetic levitation support. We find that our low power motors, with rotational speeds of 618 and 833 rpms, exhibit performance free from excess vibrations that might hinder performance. This means that the actuation of the motors is adequately stabilized by the axle and results in motors capable of being utilized despite the levitation support. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=levitating%20motor" title="levitating motor">levitating motor</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20levitation%20support" title=" magnetic levitation support"> magnetic levitation support</a>, <a href="https://publications.waset.org/abstracts/search?q=fitness" title=" fitness"> fitness</a>, <a href="https://publications.waset.org/abstracts/search?q=axle" title=" axle"> axle</a> </p> <a href="https://publications.waset.org/abstracts/24674/reduced-vibration-in-a-levitating-motor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24674.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">370</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5677</span> The Influence of Reaction Parameters on Magnetic Properties of Synthesized Strontium Ferrite</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Bahgat">M. Bahgat</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20M.%20Awan"> F. M. Awan</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20A.%20Hanafy"> H. A. Hanafy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The conventional ceramic route was utilized to prepare a hard magnetic powder (M-type strontium ferrite, SrFe12O19). The stoichiometric mixture of iron oxide and strontium carbonate were calcined at 1000°C and then fired at various temperatures. The influence of various reaction parameters such as mixing ratio, calcination temperature, firing temperature and firing time on the magnetic behaviors of the synthesized magnetic powder were investigated.The magnetic properties including Coercivity (Hc), Magnetic saturation (Ms), and Magnetic remnance (Mr) were measured by vibrating sample magnetometer. Morphologically the produced magnetic powder has a dense hexagonal grain shape structure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hard%20magnetic%20materials" title="hard magnetic materials">hard magnetic materials</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20route" title=" ceramic route"> ceramic route</a>, <a href="https://publications.waset.org/abstracts/search?q=strontium%20ferrite" title=" strontium ferrite"> strontium ferrite</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20properties" title=" magnetic properties"> magnetic properties</a> </p> <a href="https://publications.waset.org/abstracts/21878/the-influence-of-reaction-parameters-on-magnetic-properties-of-synthesized-strontium-ferrite" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21878.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">693</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5676</span> Geophysical Methods of Mapping Groundwater Aquifer System: Perspectives and Inferences From Lisana Area, Western Margin of the Central Main Ethiopian Rift</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Esubalew%20Yehualaw%20Melaku">Esubalew Yehualaw Melaku</a>, <a href="https://publications.waset.org/abstracts/search?q=Tigistu%20Haile%20Eritro"> Tigistu Haile Eritro</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, two basic geophysical methods are applied for mapping the groundwater aquifer system in the Lisana area along the Guder River, northeast of Hosanna town, near the western margin of the Central Main Ethiopian Rift. The main target of the study is to map the potential aquifer zone and investigate the groundwater potential for current and future development of the resource in the Gode area. The geophysical methods employed in this study include, Vertical Electrical Sounding (VES) and magnetic survey techniques. Electrical sounding was used to examine and map the depth to the potential aquifer zone of the groundwater and its distribution over the area. On the other hand, a magnetic survey was used to delineate contact between lithologic units and geological structures. The 2D magnetic modeling and the geoelectric sections are used for the identification of weak zones, which control the groundwater flow and storage system. The geophysical survey comprises of twelve VES readings collected by using a Schlumberger array along six profile lines and more than four hundred (400) magnetic readings at about 10m station intervals along four profiles and 20m along three random profiles. The study result revealed that the potential aquifer in the area is obtained at a depth range from 45m to 92m. This is the response of the highly weathered/ fractured ignimbrite and pumice layer with sandy soil, which is the main water-bearing horizon. Overall, in the neighborhood of four VES points, VES- 2, VES- 3, VES-10, and VES-11, shows good water-bearing zones in the study area. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vertical%20electrical%20sounding" title="vertical electrical sounding">vertical electrical sounding</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20survey" title=" magnetic survey"> magnetic survey</a>, <a href="https://publications.waset.org/abstracts/search?q=aquifer" title=" aquifer"> aquifer</a>, <a href="https://publications.waset.org/abstracts/search?q=groundwater%20potential" title=" groundwater potential"> groundwater potential</a> </p> <a href="https://publications.waset.org/abstracts/165500/geophysical-methods-of-mapping-groundwater-aquifer-system-perspectives-and-inferences-from-lisana-area-western-margin-of-the-central-main-ethiopian-rift" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165500.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">79</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5675</span> Polymer Aerostatic Thrust Bearing under Circular Support for High Static Stiffness</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sy-Wei%20Lo">Sy-Wei Lo</a>, <a href="https://publications.waset.org/abstracts/search?q=Chi-Heng%20Yu"> Chi-Heng Yu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A new design of aerostatic thrust bearing is proposed for high static stiffness. The bearing body, which is mead of polymer covered with metallic membrane, is held by a circular ring. Such a support helps form a concave air gap to grasp the air pressure. The polymer body, which can be made rapidly by either injection or molding is able to provide extra damping under dynamic loading. The smooth membrane not only serves as the bearing surface but also protects the polymer body. The restrictor is a capillary inside a silicone tube. It can passively compensate the variation of load by expanding the capillary diameter for more air flux. In the present example, the stiffness soars from 15.85 N/µm of typical bearing to 349.85 N/µm at bearing elevation 9.5 µm; meanwhile the load capacity also enhances from 346.86 N to 704.18 N. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aerostatic" title="aerostatic">aerostatic</a>, <a href="https://publications.waset.org/abstracts/search?q=bearing" title=" bearing"> bearing</a>, <a href="https://publications.waset.org/abstracts/search?q=polymer" title=" polymer"> polymer</a>, <a href="https://publications.waset.org/abstracts/search?q=static%20stiffness" title=" static stiffness"> static stiffness</a> </p> <a href="https://publications.waset.org/abstracts/30015/polymer-aerostatic-thrust-bearing-under-circular-support-for-high-static-stiffness" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30015.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">370</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5674</span> A Numerical Study on Semi-Active Control of a Bridge Deck under Seismic Excitation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Yanik">A. Yanik</a>, <a href="https://publications.waset.org/abstracts/search?q=U.%20Aldemir"> U. Aldemir</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigates the benefits of implementing the semi-active devices in relation to passive viscous damping in the context of seismically isolated bridge structures. Since the intrinsically nonlinear nature of semi-active devices prevents the direct evaluation of Laplace transforms, frequency response functions are compiled from the computed time history response to sinusoidal and pulse-like seismic excitation. A simple semi-active control policy is used in regard to passive linear viscous damping and an optimal non-causal semi-active control strategy. The control strategy requires optimization. Euler-Lagrange equations are solved numerically during this procedure. The optimal closed-loop performance is evaluated for an idealized controllable dash-pot. A simplified single-degree-of-freedom model of an isolated bridge is used as numerical example. Two bridge cases are investigated. These cases are; bridge deck without the isolation bearing and bridge deck with the isolation bearing. To compare the performances of the passive and semi-active control cases, frequency dependent acceleration, velocity and displacement response transmissibility ratios <em>T<sub>a</sub></em>(<em>w</em>), <em>T<sub>v</sub></em>(<em>w</em>), and <em>T<sub>d</sub></em>(<em>w</em>) are defined. To fully investigate the behavior of the structure subjected to the sinusoidal and pulse type excitations, different damping levels are considered. Numerical results showed that, under the effect of external excitation, bridge deck with semi-active control showed better structural performance than the passive bridge deck case. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bridge%20structures" title="bridge structures">bridge structures</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20control" title=" passive control"> passive control</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic" title=" seismic"> seismic</a>, <a href="https://publications.waset.org/abstracts/search?q=semi-active%20control" title=" semi-active control"> semi-active control</a>, <a href="https://publications.waset.org/abstracts/search?q=viscous%20damping" title=" viscous damping"> viscous damping</a> </p> <a href="https://publications.waset.org/abstracts/96050/a-numerical-study-on-semi-active-control-of-a-bridge-deck-under-seismic-excitation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96050.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">241</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5673</span> Analytical Model for Vacuum Cathode Arcs in an Oblique Magnetic Field</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20W.%20Chen">P. W. Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20T.%20Chang"> C. T. Chang</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Peng"> Y. Peng</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Y.%20Wu"> J. Y. Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20J.%20Jan"> D. J. Jan</a>, <a href="https://publications.waset.org/abstracts/search?q=Md.%20Manirul%20Ali"> Md. Manirul Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the last decade, the nature of cathode spot splitting and the current per spot depended on an oblique magnetic field was investigated. This model for cathode current splitting is developed that we have investigated with relationship the magnetic pressures produced by kinetic pressure, self-magnetic pressure, and changed with an external magnetic field. We propose a theoretical model that has been established to an external magnetic field with components normal and tangential to the cathode surface influenced on magnetic pressure strength. We mainly focus on developed to understand the current per spot influenced with the tangential magnetic field strength and normal magnetic field strength. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cathode%20spot" title="cathode spot">cathode spot</a>, <a href="https://publications.waset.org/abstracts/search?q=vacuum%20arc%20discharge" title=" vacuum arc discharge"> vacuum arc discharge</a>, <a href="https://publications.waset.org/abstracts/search?q=oblique%20magnetic%20field" title=" oblique magnetic field"> oblique magnetic field</a>, <a href="https://publications.waset.org/abstracts/search?q=tangential%20magnetic%20field" title=" tangential magnetic field"> tangential magnetic field</a> </p> <a href="https://publications.waset.org/abstracts/52606/analytical-model-for-vacuum-cathode-arcs-in-an-oblique-magnetic-field" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52606.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">324</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5672</span> Consideration of Magnetic Lines of Force as Magnets Produced by Percussion Waves</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Angel%20P%C3%A9rez%20S%C3%A1nchez">Angel Pérez Sánchez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Consider magnetic lines of force as a vector magnetic current was introduced by convention around 1830. But this leads to a dead end in traditional physics, and quantum explanations must be referred to explain the magnetic phenomenon. However, a study of magnetic lines as percussive waves leads to other paths capable of interpreting magnetism through traditional physics. Methodology: Brick used in the experiment: two parallel electric current cables attract each other if current goes in the same direction and its application at a microscopic level inside magnets. Significance: Consideration of magnetic lines as magnets themselves would mean a paradigm shift in the study of magnetism and open the way to provide solutions to mysteries of magnetism until now only revealed by quantum mechanics. Major findings: discover how a magnetic field is created, as well as reason how magnetic attraction and repulsion work, understand how magnets behave when splitting them, and reveal the impossibility of a Magnetic Monopole. All of this is presented as if it were a symphony in which all the notes fit together perfectly to create a beautiful, smart, and simple work. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetic%20lines%20of%20force" title="magnetic lines of force">magnetic lines of force</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20field" title=" magnetic field"> magnetic field</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20attraction%20and%20repulsion" title=" magnetic attraction and repulsion"> magnetic attraction and repulsion</a>, <a href="https://publications.waset.org/abstracts/search?q=magnet%20split" title=" magnet split"> magnet split</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20monopole" title=" magnetic monopole"> magnetic monopole</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20lines%20of%20force%20as%20magnets" title=" magnetic lines of force as magnets"> magnetic lines of force as magnets</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20lines%20of%20force%20as%20waves" title=" magnetic lines of force as waves"> magnetic lines of force as waves</a> </p> <a href="https://publications.waset.org/abstracts/172916/consideration-of-magnetic-lines-of-force-as-magnets-produced-by-percussion-waves" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/172916.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">5671</span> Discrete Element Modeling on Bearing Capacity Problems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Li">N. Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20M.%20Cheng"> Y. M. Cheng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the classical bearing capacity problem is re-considered from discrete element analysis. In the discrete element approach, the bearing capacity problem is considered from the elastic stage to plastic stage to rupture stage (large displacement). The bearing capacity failure mechanism of a strip footing on soil is investigated, and the influence of micro-parameters on the bearing capacity of soil is also observed. It is found that the distinct element method (DEM) gives very good visualized results, and basically coincides well with that derived by the classical methods. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bearing%20capacity" title="bearing capacity">bearing capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=distinct%20element%20method" title=" distinct element method"> distinct element method</a>, <a href="https://publications.waset.org/abstracts/search?q=failure%20mechanism" title=" failure mechanism"> failure mechanism</a>, <a href="https://publications.waset.org/abstracts/search?q=large%20displacement" title=" large displacement"> large displacement</a> </p> <a href="https://publications.waset.org/abstracts/43831/discrete-element-modeling-on-bearing-capacity-problems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43831.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">365</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5670</span> Signal Processing of Barkhausen Noise Signal for Assessment of Increasing Down Feed in Surface Ground Components with Poor Micro-Magnetic Response</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tanmaya%20Kumar%20Dash">Tanmaya Kumar Dash</a>, <a href="https://publications.waset.org/abstracts/search?q=Tarun%20Karamshetty"> Tarun Karamshetty</a>, <a href="https://publications.waset.org/abstracts/search?q=Soumitra%20Paul"> Soumitra Paul</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Barkhausen Noise Analysis (BNA) technique has been utilized to assess surface integrity of steels. But the BNA technique is not very successful in evaluating surface integrity of ground steels that exhibit poor micro-magnetic response. A new approach has been proposed for the processing of BN signal with Fast Fourier transforms while Wavelet transforms has been used to remove noise from the BN signal, with judicious choice of the ‘threshold’ value, when the micro-magnetic response of the work material is poor. In the present study, the effect of down feed induced upon conventional plunge surface grinding of hardened bearing steel has been investigated along with an ultrasonically cleaned, wet polished and a sample ground with spark out technique for benchmarking. Moreover, the FFT analysis has been established, at different sets of applied voltages and applied frequency and the pattern of the BN signal in the frequency domain is analyzed. The study also depicts the wavelet transforms technique with different levels of decomposition and different mother wavelets, which has been used to reduce the noise value in BN signal of materials with poor micro-magnetic response, in order to standardize the procedure for all BN signals depending on the frequency of the applied voltage. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=barkhausen%20noise%20analysis" title="barkhausen noise analysis">barkhausen noise analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=grinding" title=" grinding"> grinding</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20properties" title=" magnetic properties"> magnetic properties</a>, <a href="https://publications.waset.org/abstracts/search?q=signal%20processing" title=" signal processing"> signal processing</a>, <a href="https://publications.waset.org/abstracts/search?q=micro-magnetic%20response" title=" micro-magnetic response"> micro-magnetic response</a> </p> <a href="https://publications.waset.org/abstracts/29867/signal-processing-of-barkhausen-noise-signal-for-assessment-of-increasing-down-feed-in-surface-ground-components-with-poor-micro-magnetic-response" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29867.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">667</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">5669</span> Analysis of the Influence of Support Failure on the Dynamic Effect of Bridge Structure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sun%20Fan">Sun Fan</a>, <a href="https://publications.waset.org/abstracts/search?q=Wu%20Xiaoguang"> Wu Xiaoguang</a>, <a href="https://publications.waset.org/abstracts/search?q=Fang%20Miaomiao"> Fang Miaomiao</a>, <a href="https://publications.waset.org/abstracts/search?q=Wei%20Chi"> Wei Chi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The degree of damage to the support is simulated by finite element software, and its influence on the static and dynamic effects of the bridge structure is analyzed. Four working conditions are selected for the study of bearing damage impact: the bearing is intact (condition 1), the bearing damage coefficient is 0.8 (condition 2), the bearing damage coefficient is 0.6 (condition 3), and the bearing damage coefficient is 0.4 (Working Condition 4). The effect value of the bridge structure under each working condition is calculated, and the simple-supported girder bridge and continuous girder bridge with typical spans are taken as examples to analyze the overall change of the bridge structure after the bearing completely fails. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bridge%20bearing%20damage" title="bridge bearing damage">bridge bearing damage</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20response" title=" dynamic response"> dynamic response</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20analysis" title=" finite element analysis"> finite element analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=load%20conditions" title=" load conditions"> load conditions</a> </p> <a href="https://publications.waset.org/abstracts/138578/analysis-of-the-influence-of-support-failure-on-the-dynamic-effect-of-bridge-structure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/138578.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">230</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">5668</span> A Practical and Theoretical Study on the Electromotor Bearing Defect Detection in a Wet Mill Using the Vibration Analysis Method and Defect Length Calculation in the Bearing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Firoozabadi">Mostafa Firoozabadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Alireza%20Foroughi%20Nematollahi"> Alireza Foroughi Nematollahi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Wet mills are one of the most important equipment in the mining industries and any defect occurrence in them can stop the production line and it can make some irrecoverable damages to the system. Electromotors are the significant parts of a mill and their monitoring is a necessary process to prevent unwanted defects. The purpose of this study is to investigate the Electromotor bearing defects, theoretically and practically, using the vibration analysis method. When a defect happens in a bearing, it can be transferred to the other parts of the equipment like inner ring, outer ring, balls, and the bearing cage. The electromotor defects source can be electrical or mechanical. Sometimes, the electrical and mechanical defect frequencies are modulated and the bearing defect detection becomes difficult. In this paper, to detect the electromotor bearing defects, the electrical and mechanical defect frequencies are extracted firstly. Then, by calculating the bearing defect frequencies, and the spectrum and time signal analysis, the bearing defects are detected. In addition, the obtained frequency determines that the bearing level in which the defect has happened and by comparing this level to the standards it determines the bearing remaining lifetime. Finally, the defect length is calculated by theoretical equations to demonstrate that there is no need to replace the bearing. The results of the proposed method, which has been implemented on the wet mills in the Golgohar mining and industrial company in Iran, show that this method is capable of detecting the electromotor bearing defects accurately and on time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bearing%20defect%20length" title="bearing defect length">bearing defect length</a>, <a href="https://publications.waset.org/abstracts/search?q=defect%20frequency" title=" defect frequency"> defect frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=electromotor%20defects" title=" electromotor defects"> electromotor defects</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration%20analysis" title=" vibration analysis"> vibration analysis</a> </p> <a href="https://publications.waset.org/abstracts/36165/a-practical-and-theoretical-study-on-the-electromotor-bearing-defect-detection-in-a-wet-mill-using-the-vibration-analysis-method-and-defect-length-calculation-in-the-bearing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36165.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">502</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">5667</span> Undrained Bearing Capacity of Circular Foundations on two Layered Clays</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Benmebarek">S. Benmebarek</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Benmoussa"> S. Benmoussa</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Benmebarek"> N. Benmebarek</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Natural soils are often deposited in layers. The estimation of the bearing capacity of the soil using conventional bearing capacity theory based on the properties of the upper layer introduces significant inaccuracies if the thickness of the top layer is comparable to the width of the foundation placed on the soil surface. In this paper, numerical computations using the FLAC code are reported to evaluate the two clay layers effect on the bearing capacity beneath rigid circular rough footing subject to axial static load. The computation results of the parametric study are used to illustrate the sensibility of the bearing capacity, the shape factor and the failure mechanisms to the layered strength and layered thickness. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=numerical%20modeling" title="numerical modeling">numerical modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=circular%20footings" title=" circular footings"> circular footings</a>, <a href="https://publications.waset.org/abstracts/search?q=layered%20clays" title=" layered clays"> layered clays</a>, <a href="https://publications.waset.org/abstracts/search?q=bearing%20capacity" title=" bearing capacity"> bearing capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=failure" title=" failure"> failure</a> </p> <a href="https://publications.waset.org/abstracts/18326/undrained-bearing-capacity-of-circular-foundations-on-two-layered-clays" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18326.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">495</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">5666</span> Variation of the Dynamic Characteristics of a Spindle with the Change of Bearing Preload</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shinji%20Oouchi">Shinji Oouchi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hajime%20Nomura"> Hajime Nomura</a>, <a href="https://publications.waset.org/abstracts/search?q=Kung-Da%20Wu"> Kung-Da Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Jui-Pin%20Hung"> Jui-Pin Hung</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents the variation of the dynamic characteristics of a spindle with the change of bearing preload. The correlations between the variation of bearing preload and fundamental modal parameters were first examined by conducting vibration tests on physical spindle units. Experimental measurements show that the dynamic compliance and damping ratio associated with the dominating modes were affected to vary with variation of the bearing preload. When the bearing preload was slightly deviated from a standard value, the modal frequency and damping ability also vary to different extent, which further enable the spindle to perform with different compliance. For the spindle used in this study, a standard preload value set on bearings would enable the spindle to behave a higher stiffness as compared with others with a preload variation. This characteristic can be served as a reference to examine the variation of bearing preload of spindle in assemblage or operation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dynamic%20compliance" title="dynamic compliance">dynamic compliance</a>, <a href="https://publications.waset.org/abstracts/search?q=bearing%20preload" title=" bearing preload"> bearing preload</a>, <a href="https://publications.waset.org/abstracts/search?q=modal%20damping" title=" modal damping"> modal damping</a>, <a href="https://publications.waset.org/abstracts/search?q=standard%20preload" title=" standard preload"> standard preload</a> </p> <a href="https://publications.waset.org/abstracts/15889/variation-of-the-dynamic-characteristics-of-a-spindle-with-the-change-of-bearing-preload" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15889.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">467</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">5665</span> Magnetic Single-Walled Carbon Nanotubes (SWCNTs) as Novel Theranostic Nanocarriers: Enhanced Targeting and Noninvasive MRI Tracking</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Achraf%20Al%20Faraj">Achraf Al Faraj</a>, <a href="https://publications.waset.org/abstracts/search?q=Asma%20Sultana%20Shaik"> Asma Sultana Shaik</a>, <a href="https://publications.waset.org/abstracts/search?q=Baraa%20Al%20Sayed"> Baraa Al Sayed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Specific and effective targeting of drug delivery systems (DDS) to cancerous sites remains a major challenge for a better diagnostic and therapy. Recently, SWCNTs with their unique physicochemical properties and the ability to cross the cell membrane show promising in the biomedical field. The purpose of this study was first to develop a biocompatible iron oxide tagged SWCNTs as diagnostic nanoprobes to allow their noninvasive detection using MRI and their preferential targeting in a breast cancer murine model by placing an optimized flexible magnet over the tumor site. Magnetic targeting was associated to specific antibody-conjugated SWCNTs active targeting. The therapeutic efficacy of doxorubicin-conjugated SWCNTs was assessed, and the superiority of diffusion-weighted (DW-) MRI as sensitive imaging biomarker was investigated. Short Polyvinylpyrrolidone (PVP) stabilized water soluble SWCNTs were first developed, tagged with iron oxide nanoparticles and conjugated with Endoglin/CD105 monoclonal antibodies. They were then conjugated with doxorubicin drugs. SWCNTs conjugates were extensively characterized using TEM, UV-Vis spectrophotometer, dynamic light scattering (DLS) zeta potential analysis and electron spin resonance (ESR) spectroscopy. Their MR relaxivities (i.e. r1 and r2*) were measured at 4.7T and their iron content and metal impurities quantified using ICP-MS. SWCNTs biocompatibility and drug efficacy were then evaluated both in vitro and in vivo using a set of immunological assays. Luciferase enhanced bioluminescence 4T1 mouse mammary tumor cells (4T1-Luc2) were injected into the right inguinal mammary fat pad of Balb/c mice. Tumor bearing mice received either free doxorubicin (DOX) drug or SWCNTs with or without either DOX or iron oxide nanoparticles. A multi-pole 10x10mm high-energy flexible magnet was maintained over the tumor site during 2 hours post-injections and their properties and polarity were optimized to allow enhanced magnetic targeting of SWCNTs toward the primary tumor site. Tumor volume was quantified during the follow-up investigation study using a fast spin echo MRI sequence. In order to detect the homing of SWCNTs to the main tumor site, susceptibility-weighted multi-gradient echo (MGE) sequence was used to generate T2* maps. Apparent diffusion coefficient (ADC) measurements were also performed as a sensitive imaging biomarker providing early and better assessment of disease treatment. At several times post-SWCNT injection, histological analysis were performed on tumor extracts and iron-loaded SWCNT were quantified using ICP-MS in tumor sites, liver, spleen, kidneys, and lung. The optimized multi-poles magnet revealed an enhanced targeting of magnetic SWCNTs to the primary tumor site, which was found to be much higher than the active targeting achieved using antibody-conjugated SWCNTs. Iron-loading allowed their sensitive noninvasive tracking after intravenous administration using MRI. The active targeting of doxorubicin through magnetic antibody-conjugated SWCNTs nanoprobes was found to considerably decrease the primary tumor site and may have inhibited the development of metastasis in the tumor-bearing mice lung. ADC measurements in DW-MRI were found to significantly increase in a time-dependent manner after the injection of DOX-conjugated SWCNTs complexes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=single-walled%20carbon%20nanotubes" title="single-walled carbon nanotubes">single-walled carbon nanotubes</a>, <a href="https://publications.waset.org/abstracts/search?q=nanomedicine" title=" nanomedicine"> nanomedicine</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20resonance%20imaging" title=" magnetic resonance imaging"> magnetic resonance imaging</a>, <a href="https://publications.waset.org/abstracts/search?q=cancer%20diagnosis%20and%20therapy" title=" cancer diagnosis and therapy"> cancer diagnosis and therapy</a> </p> <a href="https://publications.waset.org/abstracts/19881/magnetic-single-walled-carbon-nanotubes-swcnts-as-novel-theranostic-nanocarriers-enhanced-targeting-and-noninvasive-mri-tracking" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19881.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">5664</span> The Mechanical Properties of a Small-Size Seismic Isolation Rubber Bearing for Bridges</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yi%20F.%20Wu">Yi F. Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Ai%20Q.%20Li"> Ai Q. Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Hao%20Wang"> Hao Wang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Taking a novel type of bridge bearings with the diameter being 100mm as an example, the theoretical analysis, the experimental research as well as the numerical simulation of the bearing were conducted. Since the normal compression-shear machines cannot be applied to the small-size bearing, an improved device to test the properties of the bearing was proposed and fabricated. Besides, the simulation of the bearing was conducted on the basis of the explicit finite element software ANSYS/LS-DYNA, and some parameters of the bearing are modified in the finite element model to effectively reduce the computation cost. Results show that all the research methods are capable of revealing the fundamental properties of the small-size bearings, and a combined use of these methods can better catch both the integral properties and the inner detailed mechanical behaviors of the bearing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ANSYS%2FLS-DYNA" title="ANSYS/LS-DYNA">ANSYS/LS-DYNA</a>, <a href="https://publications.waset.org/abstracts/search?q=compression%20shear" title=" compression shear"> compression shear</a>, <a href="https://publications.waset.org/abstracts/search?q=contact%20analysis" title=" contact analysis"> contact analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=explicit%20algorithm" title=" explicit algorithm"> explicit algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=small-size" title=" small-size"> small-size</a> </p> <a href="https://publications.waset.org/abstracts/82546/the-mechanical-properties-of-a-small-size-seismic-isolation-rubber-bearing-for-bridges" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82546.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">180</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">5663</span> Magnetic and Optical Properties of GaFeMnN</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.Abbad">A.Abbad</a>, <a href="https://publications.waset.org/abstracts/search?q=H.A.Bentounes"> H.A.Bentounes</a>, <a href="https://publications.waset.org/abstracts/search?q=W.Benstaali"> W.Benstaali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The full-potential linearized augmented plane wave method (FP-LAPW) within the Generalized Gradient Approximation (GGA) is used to calculate the magnetic and optical properties of quaternary GaFeMnN. The results show that the compound becomes magnetic and half metallic and there is an apparition of peaks at low frequencies for the optical properties. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=FP-LAPW" title="FP-LAPW">FP-LAPW</a>, <a href="https://publications.waset.org/abstracts/search?q=LSDA" title=" LSDA"> LSDA</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20moment" title=" magnetic moment"> magnetic moment</a>, <a href="https://publications.waset.org/abstracts/search?q=reflectivity" title=" reflectivity "> reflectivity </a> </p> <a href="https://publications.waset.org/abstracts/26313/magnetic-and-optical-properties-of-gafemnn" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26313.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">524</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">5662</span> Treatment of Low-Grade Iron Ore Using Two Stage Wet High-Intensity Magnetic Separation Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Moses%20C.%20Siame">Moses C. Siame</a>, <a href="https://publications.waset.org/abstracts/search?q=Kazutoshi%20Haga"> Kazutoshi Haga</a>, <a href="https://publications.waset.org/abstracts/search?q=Atsushi%20Shibayama"> Atsushi Shibayama</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigates the removal of silica, alumina and phosphorus as impurities from Sanje iron ore using wet high-intensity magnetic separation (WHIMS). Sanje iron ore contains low-grade hematite ore found in Nampundwe area of Zambia from which iron is to be used as the feed in the steelmaking process. The chemical composition analysis using X-ray Florence spectrometer showed that Sanje low-grade ore contains 48.90 mass% of hematite (Fe<sub>2</sub>O<sub>3</sub>) with 34.18 mass% as an iron grade. The ore also contains silica (SiO<sub>2</sub>) and alumina (Al<sub>2</sub>O<sub>3</sub>) of 31.10 mass% and 7.65 mass% respectively. The mineralogical analysis using X-ray diffraction spectrometer showed hematite and silica as the major mineral components of the ore while magnetite and alumina exist as minor mineral components. Mineral particle distribution analysis was done using scanning electron microscope with an X-ray energy dispersion spectrometry (SEM-EDS) and images showed that the average mineral size distribution of alumina-silicate gangue particles is in order of 100 μm and exists as iron-bearing interlocked particles. Magnetic separation was done using series L model 4 Magnetic Separator. The effect of various magnetic separation parameters such as magnetic flux density, particle size, and pulp density of the feed was studied during magnetic separation experiments. The ore with average particle size of 25 µm and pulp density of 2.5% was concentrated using pulp flow of 7 L/min. The results showed that 10 T was optimal magnetic flux density which enhanced the recovery of 93.08% of iron with 53.22 mass% grade. The gangue mineral particles containing 12 mass% silica and 3.94 mass% alumna remained in the concentrate, therefore the concentrate was further treated in the second stage WHIMS using the same parameters from the first stage. The second stage process recovered 83.41% of iron with 67.07 mass% grade. Silica was reduced to 2.14 mass% and alumina to 1.30 mass%. Accordingly, phosphorus was also reduced to 0.02 mass%. Therefore, the two stage magnetic separation process was established using these results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sanje%20iron%20ore" title="Sanje iron ore">Sanje iron ore</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20separation" title=" magnetic separation"> magnetic separation</a>, <a href="https://publications.waset.org/abstracts/search?q=silica" title=" silica"> silica</a>, <a href="https://publications.waset.org/abstracts/search?q=alumina" title=" alumina"> alumina</a>, <a href="https://publications.waset.org/abstracts/search?q=recovery" title=" recovery"> recovery</a> </p> <a href="https://publications.waset.org/abstracts/80176/treatment-of-low-grade-iron-ore-using-two-stage-wet-high-intensity-magnetic-separation-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/80176.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">258</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=active%20magnetic%20bearing&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=active%20magnetic%20bearing&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=active%20magnetic%20bearing&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=active%20magnetic%20bearing&page=5">5</a></li> <li class="page-item"><a class="page-link" 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