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leakage current</title> <meta name="description" content="Search results for: total leakage current"> <meta name="keywords" content="total leakage current"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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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="total leakage current"> <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> 17166</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: total leakage current</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">17166</span> Design of a Hand-Held, Clamp-on, Leakage Current Sensor for High Voltage Direct Current Insulators</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Morn%C3%A9%20Roman">Morné Roman</a>, <a href="https://publications.waset.org/abstracts/search?q=Robert%20van%20Zyl"> Robert van Zyl</a>, <a href="https://publications.waset.org/abstracts/search?q=Nishanth%20Parus"> Nishanth Parus</a>, <a href="https://publications.waset.org/abstracts/search?q=Nishal%20Mahatho"> Nishal Mahatho</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Leakage current monitoring for high voltage transmission line insulators is of interest as a performance indicator. Presently, to the best of our knowledge, there is no commercially available, clamp-on type, non-intrusive device for measuring leakage current on energised high voltage direct current (HVDC) transmission line insulators. The South African power utility, Eskom, is investigating the development of such a hand-held sensor for two important applications; first, for continuous real-time condition monitoring of HVDC line insulators and, second, for use by live line workers to determine if it is safe to work on energised insulators. In this paper, a DC leakage current sensor based on magnetic field sensing techniques is developed. The magnetic field sensor used in the prototype can also detect alternating current up to 5 MHz. The DC leakage current prototype detects the magnetic field associated with the current flowing on the surface of the insulator. Preliminary HVDC leakage current measurements are performed on glass insulators. The results show that the prototype can accurately measure leakage current in the specified current range of 1-200 mA. The influence of external fields from the HVDC line itself on the leakage current measurements is mitigated through a differential magnetometer sensing technique. Thus, the developed sensor can perform measurements on in-service HVDC insulators. The research contributes to the body of knowledge by providing a sensor to measure leakage current on energised HVDC insulators non-intrusively. This sensor can also be used by live line workers to inform them whether or not it is safe to perform maintenance on energized insulators. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=direct%20current" title="direct current">direct current</a>, <a href="https://publications.waset.org/abstracts/search?q=insulator" title=" insulator"> insulator</a>, <a href="https://publications.waset.org/abstracts/search?q=leakage%20current" title=" leakage current"> leakage current</a>, <a href="https://publications.waset.org/abstracts/search?q=live%20line" title=" live line"> live line</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=sensor" title=" sensor"> sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=transmission%20lines" title=" transmission lines"> transmission lines</a> </p> <a href="https://publications.waset.org/abstracts/97695/design-of-a-hand-held-clamp-on-leakage-current-sensor-for-high-voltage-direct-current-insulators" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97695.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">173</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">17165</span> Technique for Online Condition Monitoring of Surge Arresters</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anil%20S.%20Khopkar">Anil S. Khopkar</a>, <a href="https://publications.waset.org/abstracts/search?q=Kartik%20S.%20Pandya"> Kartik S. Pandya</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Overvoltage in power systems is a phenomenon that cannot be avoided. However, it can be controlled to a certain extent. Power system equipment is to be protected against overvoltage to avoid system failure. Metal Oxide Surge Arresters (MOSA) are connected to the system for the protection of the power system against overvoltages. The MOSA will behave as an insulator under normal working conditions, where it offers a conductive path under voltage conditions. MOSA consists of zinc oxide elements (ZnO Blocks), which have non-linear V-I characteristics. ZnO blocks are connected in series and fitted in ceramic or polymer housing. This degrades due to the aging effect under continuous operation. Degradation of zinc oxide elements increases the leakage current flowing from the surge arresters. This Increased leakage current results in the increased temperature of the surge arrester, which further decreases the resistance of zinc oxide elements. As a result, leakage current increases, which again increases the temperature of a MOSA. This creates thermal runaway conditions for MOSA. Once it reaches the thermal runaway condition, it cannot return to normal working conditions. This condition is a primary cause of premature failure of surge arresters, as MOSA constitutes a core protective device for electrical power systems against transients. It contributes significantly to the reliable operation of the power system network. Hence, the condition monitoring of surge arresters should be done at periodic intervals. Online and Offline condition monitoring techniques are available for surge arresters. Offline condition monitoring techniques are not very popular as they require removing surge arresters from the system, which requires system shutdown. Hence, online condition monitoring techniques are very popular. This paper presents the evaluation technique for the surge arrester condition based on the leakage current analysis. Maximum amplitude of total leakage current (IT), Maximum amplitude of fundamental resistive leakage current (IR) and maximum amplitude of third harmonic resistive leakage current (I3rd) have been analyzed as indicators for surge arrester condition monitoring. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=metal%20oxide%20surge%20arrester%20%28MOSA%29" title="metal oxide surge arrester (MOSA)">metal oxide surge arrester (MOSA)</a>, <a href="https://publications.waset.org/abstracts/search?q=over%20voltage" title=" over voltage"> over voltage</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20leakage%20current" title=" total leakage current"> total leakage current</a>, <a href="https://publications.waset.org/abstracts/search?q=resistive%20leakage%20current" title=" resistive leakage current"> resistive leakage current</a> </p> <a href="https://publications.waset.org/abstracts/182737/technique-for-online-condition-monitoring-of-surge-arresters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182737.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">66</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">17164</span> A Double PWM Source Inverter Technique with Reduced Leakage Current for Application on Standalone Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Md.Noman%20Habib%20Khan">Md.Noman Habib Khan</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20S.%20Tajul%20Islam"> M. S. Tajul Islam</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20S.%20Gunawan"> T. S. Gunawan</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Hasanuzzaman"> M. Hasanuzzaman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The photovoltaic (PV) panel with no galvanic isolation system is well-known technique in the world which is effective and deliver power with enhanced efficiency. The PV generation presented here is for stand-alone system installed in remote areas when as the resulting power gets connected to electronic load installation instead of being tied to the grid. Though very small, even then transformer-less topology is shown to be with leakage in pico-ampere range. By using PWM technique PWM, leakage current in different situations is shown. The results that are demonstrated in this paper show how the pico-ampere current is reduced to femto-ampere through use of inductors and capacitors of suitable values of inductor and capacitors with the load. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=photovoltaic%20%28PV%29%20panel" title="photovoltaic (PV) panel">photovoltaic (PV) panel</a>, <a href="https://publications.waset.org/abstracts/search?q=duty%20cycle" title=" duty cycle"> duty cycle</a>, <a href="https://publications.waset.org/abstracts/search?q=pulse%20%0D%0Aduration%20modulation%20%28PDM%29" title=" pulse duration modulation (PDM)"> pulse duration modulation (PDM)</a>, <a href="https://publications.waset.org/abstracts/search?q=leakage%20current" title=" leakage current"> leakage current</a> </p> <a href="https://publications.waset.org/abstracts/19574/a-double-pwm-source-inverter-technique-with-reduced-leakage-current-for-application-on-standalone-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19574.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">534</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">17163</span> Leakage Current Analysis of FinFET Based 7T SRAM at 32nm Technology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chhavi%20Saxena">Chhavi Saxena</a> </p> <p class="card-text"><strong>Abstract:</strong></p> FinFETs can be a replacement for bulk-CMOS transistors in many different designs. Its low leakage/standby power property makes FinFETs a desirable option for memory sub-systems. Memory modules are widely used in most digital and computer systems. Leakage power is very important in memory cells since most memory applications access only one or very few memory rows at a given time. As technology scales down, the importance of leakage current and power analysis for memory design is increasing. In this paper, we discover an option for low power interconnect synthesis at the 32nm node and beyond, using Fin-type Field-Effect Transistors (FinFETs) which are a promising substitute for bulk CMOS at the considered gate lengths. We consider a mechanism for improving FinFETs efficiency, called variable supply voltage schemes. In this paper, we’ve illustrated the design and implementation of FinFET based 4x4 SRAM cell array by means of one bit 7T SRAM. FinFET based 7T SRAM has been designed and analysis have been carried out for leakage current, dynamic power and delay. For the validation of our design approach, the output of FinFET SRAM array have been compared with standard CMOS SRAM and significant improvements are obtained in proposed model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=FinFET" title="FinFET">FinFET</a>, <a href="https://publications.waset.org/abstracts/search?q=7T%20SRAM%20cell" title=" 7T SRAM cell"> 7T SRAM cell</a>, <a href="https://publications.waset.org/abstracts/search?q=leakage%20current" title=" leakage current"> leakage current</a>, <a href="https://publications.waset.org/abstracts/search?q=delay" title=" delay "> delay </a> </p> <a href="https://publications.waset.org/abstracts/16196/leakage-current-analysis-of-finfet-based-7t-sram-at-32nm-technology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16196.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">455</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">17162</span> Simulation and Analysis of Different Parameters in Hydraulic Circuit Due to Leakage</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.Das">J.Das</a>, <a href="https://publications.waset.org/abstracts/search?q=Gyan%20Wrat"> Gyan Wrat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Leakage is the main gradual failure in the fluid power system, which is usually caused by the impurity in the oil and wear of matching surfaces between parts and lead to the change of the gap value. When leakage occurs in the system, the oil will flow from the high pressure chamber into the low pressure chamber through the gap, causing the reduction of system flow as well as the loss of system pressure, resulting in the decreasing of system efficiency. In the fluid power system, internal leakage may occur in various components such as gear pump, reversing valve and hydraulic cylinder, and affect the system work performance. Therefore, component leakage in the fluid power system is selected as the study to characterize the leakage and the effect of leakage on the system. Effect of leakage on system pressure and cylinder displacement can be obtained using pressure sensors and the displacement sensor. The leakage can be varied by changing the orifice using a flow control valve. Hydraulic circuit for leakage will be developed in Matlab/Simulink environment and simulations will be done by changing different parameters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=leakage%20causes" title="leakage causes">leakage causes</a>, <a href="https://publications.waset.org/abstracts/search?q=effect" title=" effect"> effect</a>, <a href="https://publications.waset.org/abstracts/search?q=analysis" title=" analysis"> analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=MATLAB%20simulation" title=" MATLAB simulation"> MATLAB simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20circuit" title=" hydraulic circuit "> hydraulic circuit </a> </p> <a href="https://publications.waset.org/abstracts/37533/simulation-and-analysis-of-different-parameters-in-hydraulic-circuit-due-to-leakage" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37533.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">399</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">17161</span> Study of Aerosol Deposition and Shielding Effects on Fluorescent Imaging Quantitative Evaluation in Protective Equipment Validation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shinhao%20Yang">Shinhao Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Hsiao-Chien%20Huang"> Hsiao-Chien Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chin-Hsiang%20Luo"> Chin-Hsiang Luo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The leakage of protective clothing is an important issue in the occupational health field. There is no quantitative method for measuring the leakage of personal protective equipment. This work aims to measure the quantitative leakage of the personal protective equipment by using the fluorochrome aerosol tracer. The fluorescent aerosols were employed as airborne particulates in a controlled chamber with ultraviolet (UV) light-detectable stickers. After an exposure-and-leakage test, the protective equipment was removed and photographed with UV-scanning to evaluate areas, color depth ratio, and aerosol deposition and shielding effects of the areas where fluorescent aerosols had adhered to the body through the protective equipment. Thus, this work built a calculation software for quantitative leakage ratio of protective clothing based on fluorescent illumination depth/aerosol concentration ratio, illumination/Fa ratio, aerosol deposition and shielding effects, and the leakage area ratio on the segmentation. The results indicated that the two-repetition total leakage rate of the X, Y, and Z type protective clothing for subject T were about 3.05, 4.21, and 3.52 (mg/m2). For five-repetition, the leakage rate of T were about 4.12, 4.52, and 5.11 (mg/m2). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fluorochrome" title="fluorochrome">fluorochrome</a>, <a href="https://publications.waset.org/abstracts/search?q=deposition" title=" deposition"> deposition</a>, <a href="https://publications.waset.org/abstracts/search?q=shielding%20effects" title=" shielding effects"> shielding effects</a>, <a href="https://publications.waset.org/abstracts/search?q=digital%20image%20processing" title=" digital image processing"> digital image processing</a>, <a href="https://publications.waset.org/abstracts/search?q=leakage%20ratio" title=" leakage ratio"> leakage ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=personal%20protective%20equipment" title=" personal protective equipment"> personal protective equipment</a> </p> <a href="https://publications.waset.org/abstracts/43218/study-of-aerosol-deposition-and-shielding-effects-on-fluorescent-imaging-quantitative-evaluation-in-protective-equipment-validation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43218.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">322</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">17160</span> Characterization of Leakage Current on the Surface of Porcelain Insulator under Contaminated Conditions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Terrab">Hocine Terrab </a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelhafid%20Bayadi"> Abdelhafid Bayadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Adel%20Kara"> Adel Kara</a>, <a href="https://publications.waset.org/abstracts/search?q=Ayman%20El-Hag"> Ayman El-Hag</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Insulator flashover under polluted conditions has been a serious threat on the reliability of power systems. It is known that the flashover process is mainly affected by the environmental conditions such as; the pollution level and humidity. Those are the essential parameters influencing the wetting process. This paper presents an investigation of the characteristics of leakage current (LC) developed on the surface of porcelain insulator at contaminated conditions under AC voltage. The study is done in an artificial fog chamber and the LC is characterized for different stages; dry, wetted and presence of discharge activities. Time-frequency and spectral analysis are adopted to calculate the evolution of LC characteristics with various stages prior to flashover occurrence. The preliminary results could be used in analysing the LC to develop more effective diagnosis of early signs of dry band arcing as an indication for insulation washing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flashover" title="flashover">flashover</a>, <a href="https://publications.waset.org/abstracts/search?q=harmonic%20components" title=" harmonic components"> harmonic components</a>, <a href="https://publications.waset.org/abstracts/search?q=leakage%20current" title=" leakage current"> leakage current</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20angle" title=" phase angle"> phase angle</a>, <a href="https://publications.waset.org/abstracts/search?q=statistical%20analysis" title=" statistical analysis"> statistical analysis</a> </p> <a href="https://publications.waset.org/abstracts/31047/characterization-of-leakage-current-on-the-surface-of-porcelain-insulator-under-contaminated-conditions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31047.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">432</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">17159</span> Practical Simulation Model of Floating-Gate MOS Transistor in Sub 100 nm Technologies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zina%20Saheb">Zina Saheb</a>, <a href="https://publications.waset.org/abstracts/search?q=Ezz%20El-Masry"> Ezz El-Masry</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As CMOS technology scaling down, Silicon oxide thickness (SiO2) become very thin (few Nano meters). When SiO2 is less than 3nm, gate direct tunneling (DT) leakage current becomes a dormant problem that impacts the transistor performance. Floating gate MOSFET (FGMOSFET) has been used in many low-voltage and low-power applications. Most of the available simulation models of FGMOSFET for analog circuit design does not account for gate DT current and there is no accurate analysis for the gate DT. It is a crucial to use an accurate mode in order to get a realistic simulation result that account for that DT impact on FGMOSFET performance effectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CMOS%20transistor" title="CMOS transistor">CMOS transistor</a>, <a href="https://publications.waset.org/abstracts/search?q=direct-tunneling%20current" title=" direct-tunneling current"> direct-tunneling current</a>, <a href="https://publications.waset.org/abstracts/search?q=floating-gate" title=" floating-gate"> floating-gate</a>, <a href="https://publications.waset.org/abstracts/search?q=gate-leakage%20current" title=" gate-leakage current"> gate-leakage current</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation%20model" title=" simulation model"> simulation model</a> </p> <a href="https://publications.waset.org/abstracts/30655/practical-simulation-model-of-floating-gate-mos-transistor-in-sub-100-nm-technologies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30655.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">529</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">17158</span> An Embedded System for Early Detection of Gas Leakage in Hospitals and Industries</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sehreen%20Moorat">Sehreen Moorat</a>, <a href="https://publications.waset.org/abstracts/search?q=Hiba"> Hiba</a>, <a href="https://publications.waset.org/abstracts/search?q=Maham%20Mahnoor"> Maham Mahnoor</a>, <a href="https://publications.waset.org/abstracts/search?q=Faryal%20Soomro"> Faryal Soomro</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Leakage of gases in a system makes infrastructures and users vulnerable; it can occur due to its environmental conditions or old groundwork. In hospitals and industries, it is very important to detect any small level of gas leakage because of their sensitivity. In this research, a portable detection system for the small leakage of gases has been developed, gas sensor (MQ-2) is used to find leakage when it’s at its initial phase. The sensor and transmitting module senses the change in level of gas by using a sensing circuit. When a concentration of gas reach at a specified threshold level, it will activate an alarm and send the alarming situation notification to receiver through GSM module. The proposed system works well in hospitals, home, and industries. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gases" title="gases">gases</a>, <a href="https://publications.waset.org/abstracts/search?q=detection" title=" detection"> detection</a>, <a href="https://publications.waset.org/abstracts/search?q=Arduino" title=" Arduino"> Arduino</a>, <a href="https://publications.waset.org/abstracts/search?q=MQ-2" title=" MQ-2"> MQ-2</a>, <a href="https://publications.waset.org/abstracts/search?q=alarm" title=" alarm"> alarm</a> </p> <a href="https://publications.waset.org/abstracts/80477/an-embedded-system-for-early-detection-of-gas-leakage-in-hospitals-and-industries" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/80477.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">205</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">17157</span> Inactivation of Listeria innocua ATCC 33092 by Gas-Phase Plasma Treatment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Z.%20Herceg">Z. Herceg</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Stulic"> V. Stulic</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Vukusic"> T. Vukusic</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Rezek%20Jambrak"> A. Rezek Jambrak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> High voltage electrical discharge plasmas are new nonthermal developing techniques used for water decontamination. To the full understanding of cell inactivation mechanisms, this study brings inactivation, recovery and cellular leakage of L. innocua cells before and after the treatment. Bacterial solution (200 mL) of L. innocua was treated in a glass reactor with a point-to-plate electrode configuration (high voltage electrode-titanium wire, was in the gas phase and grounded electrode was in the liquid phase). Argon was injected into the headspace of the reactor at the gas flow of 5 L/min. Frequency of 60, 90 and 120 Hz, time of 5 and 10 min, positive polarity and conductivity of media of 100 µS/cm were chosen to define listed parameters. With a longer treatment time inactivation was higher as well as the increase in cellular leakage. Despite total inactivation recovery of cells occurred probably because of a high leakage of proteins, compared to lower leakage of nucleic acids (DNA and RNA). In order to define mechanisms of inactivation further research is needed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Listeria%20innocua%20ATCC%2033092" title="Listeria innocua ATCC 33092">Listeria innocua ATCC 33092</a>, <a href="https://publications.waset.org/abstracts/search?q=inactivation" title=" inactivation"> inactivation</a>, <a href="https://publications.waset.org/abstracts/search?q=gas%20phase%20plasma" title=" gas phase plasma"> gas phase plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=cellular%20leakage" title=" cellular leakage"> cellular leakage</a>, <a href="https://publications.waset.org/abstracts/search?q=recovery%20of%20cells" title=" recovery of cells"> recovery of cells</a> </p> <a href="https://publications.waset.org/abstracts/90157/inactivation-of-listeria-innocua-atcc-33092-by-gas-phase-plasma-treatment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90157.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">176</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">17156</span> Research on Placement Method of the Magnetic Flux Leakage Sensor Based on Online Detection of the Transformer Winding Deformation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wei%20Zheng">Wei Zheng</a>, <a href="https://publications.waset.org/abstracts/search?q=Mao%20Ji"> Mao Ji</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhe%20Hou"> Zhe Hou</a>, <a href="https://publications.waset.org/abstracts/search?q=Meng%20Huang"> Meng Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Bo%20Qi"> Bo Qi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The transformer is the key equipment of the power system. Winding deformation is one of the main transformer defects, and timely and effective detection of the transformer winding deformation can ensure the safe and stable operation of the transformer to the maximum extent. When winding deformation occurs, the size, shape and spatial position of the winding will change, which directly leads to the change of magnetic flux leakage distribution. Therefore, it is promising to study the online detection method of the transformer winding deformation based on magnetic flux leakage characteristics, in which the key step is to study the optimal placement method of magnetic flux leakage sensors inside the transformer. In this paper, a simulation model of the transformer winding deformation is established to obtain the internal magnetic flux leakage distribution of the transformer under normal operation and different winding deformation conditions, and the law of change of magnetic flux leakage distribution due to winding deformation is analyzed. The results show that different winding deformation leads to different characteristics of the magnetic flux leakage distribution. On this basis, an optimized placement of magnetic flux leakage sensors inside the transformer is proposed to provide a basis for the online detection method of transformer winding deformation based on the magnetic flux leakage characteristics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetic%20flux%20leakage" title="magnetic flux leakage">magnetic flux leakage</a>, <a href="https://publications.waset.org/abstracts/search?q=sensor%20placement%20method" title=" sensor placement method"> sensor placement method</a>, <a href="https://publications.waset.org/abstracts/search?q=transformer" title=" transformer"> transformer</a>, <a href="https://publications.waset.org/abstracts/search?q=winding%20deformation" title=" winding deformation"> winding deformation</a> </p> <a href="https://publications.waset.org/abstracts/136348/research-on-placement-method-of-the-magnetic-flux-leakage-sensor-based-on-online-detection-of-the-transformer-winding-deformation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/136348.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">196</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">17155</span> Research on Axial End Flux Leakage and Detent Force of Transverse Flux PM Linear Machine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=W.%20R.%20Li">W. R. Li</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20K.%20Xia"> J. K. Xia</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Q.%20Peng"> R. Q. Peng</a>, <a href="https://publications.waset.org/abstracts/search?q=Z.%20Y.%20Guo"> Z. Y. Guo</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Jiang"> L. Jiang </a> </p> <p class="card-text"><strong>Abstract:</strong></p> According to 3D magnetic circuit of the transverse flux PM linear machine, distribution law is presented, and analytical expression of axial end flux leakage is derived using numerical method. Maxwell stress tensor is used to solve detent force of mover. A 3D finite element model of the transverse flux PM machine is built to analyze the flux distribution and detent force. Experimental results of the prototype verified the validity of axial end flux leakage and detent force theoretical derivation, the research on axial end flux leakage and detent force provides a valuable reference to other types of linear machine. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=axial%20end%20flux%20leakage" title="axial end flux leakage">axial end flux leakage</a>, <a href="https://publications.waset.org/abstracts/search?q=detent%20force" title=" detent force"> detent force</a>, <a href="https://publications.waset.org/abstracts/search?q=flux%20distribution" title=" flux distribution"> flux distribution</a>, <a href="https://publications.waset.org/abstracts/search?q=transverse%20flux%20PM%20linear%20machine" title=" transverse flux PM linear machine"> transverse flux PM linear machine</a> </p> <a href="https://publications.waset.org/abstracts/46785/research-on-axial-end-flux-leakage-and-detent-force-of-transverse-flux-pm-linear-machine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46785.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">448</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">17154</span> Optimizing Power in Sequential Circuits by Reducing Leakage Current Using Enhanced Multi Threshold CMOS </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Patikineti%20Sreenivasulu">Patikineti Sreenivasulu</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20srinivasa%20Rao"> K. srinivasa Rao</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Vinaya%20Babu"> A. Vinaya Babu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The demand for portability, performance and high functional integration density of digital devices leads to the scaling of complementary metal oxide semiconductor (CMOS) devices inevitable. The increase in power consumption, coupled with the increasing demand for portable/hand-held electronics, has made power consumption a dominant concern in the design of VLSI circuits today. MTCMOS technology provides low leakage and high performance operation by utilizing high speed, low Vt (LVT) transistors for logic cells and low leakage, high Vt (HVT) devices as sleep transistors. Sleep transistors disconnect logic cells from the supply and/or ground to reduce the leakage in the sleep mode. In this technology, energy consumption while doing the mode transition and minimum time required to turn ON the circuit upon receiving the wake up signal are issues to be considered because these can adversely impact the performance of VLSI circuit. In this paper we are introducing an enhancing method of MTCMOS technology to optimize the power in MTCMOS sequential circuits. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=power%20consumption" title="power consumption">power consumption</a>, <a href="https://publications.waset.org/abstracts/search?q=ultra-low%20power" title=" ultra-low power"> ultra-low power</a>, <a href="https://publications.waset.org/abstracts/search?q=leakage" title=" leakage"> leakage</a>, <a href="https://publications.waset.org/abstracts/search?q=sub%20threshold" title=" sub threshold"> sub threshold</a>, <a href="https://publications.waset.org/abstracts/search?q=MTCMOS" title=" MTCMOS"> MTCMOS</a> </p> <a href="https://publications.waset.org/abstracts/35180/optimizing-power-in-sequential-circuits-by-reducing-leakage-current-using-enhanced-multi-threshold-cmos" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35180.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">406</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">17153</span> Water Leakage Detection System of Pipe Line using Radial Basis Function Neural Network</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Ejah%20Umraeni%20Salam">A. Ejah Umraeni Salam</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Tola"> M. Tola</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Selintung"> M. Selintung</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Maricar"> F. Maricar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Clean water is an essential and fundamental human need. Therefore, its supply must be assured by maintaining the quality, quantity and water pressure. However the fact is, on its distribution system, leakage happens and becomes a common world issue. One of the technical causes of the leakage is a leaking pipe. The purpose of the research is how to use the Radial Basis Function Neural (RBFNN) model to detect the location and the magnitude of the pipeline leakage rapidly and efficiently. In this study the RBFNN are trained and tested on data from EPANET hydraulic modeling system. Method of Radial Basis Function Neural Network is proved capable to detect location and magnitude of pipeline leakage with of the accuracy of the prediction results based on the value of RMSE (Root Meant Square Error), comparison prediction and actual measurement approaches 0.000049 for the whole pipeline system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=radial%20basis%20function%20neural%20network" title="radial basis function neural network">radial basis function neural network</a>, <a href="https://publications.waset.org/abstracts/search?q=leakage%20pipeline" title=" leakage pipeline"> leakage pipeline</a>, <a href="https://publications.waset.org/abstracts/search?q=EPANET" title=" EPANET"> EPANET</a>, <a href="https://publications.waset.org/abstracts/search?q=RMSE" title=" RMSE"> RMSE</a> </p> <a href="https://publications.waset.org/abstracts/7608/water-leakage-detection-system-of-pipe-line-using-radial-basis-function-neural-network" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7608.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">358</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">17152</span> Performance Improvement of SOI-Tri Gate FinFET Transistor Using High-K Dielectric with Metal Gate </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Zohra%20Rahou">Fatima Zohra Rahou</a>, <a href="https://publications.waset.org/abstracts/search?q=A.Guen%20Bouazza"> A.Guen Bouazza</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Bouazza"> B. Bouazza</a> </p> <p class="card-text"><strong>Abstract:</strong></p> SOI TRI GATE FinFET transistors have emerged as novel devices due to its simple architecture and better performance: better control over short channel effects (SCEs) and reduced power dissipation due to reduced gate leakage currents. As the oxide thickness scales below 2 nm, leakage currents due to tunneling increase drastically, leading to high power consumption and reduced device reliability. Replacing the SiO2 gate oxide with a high-κ material allows increased gate capacitance without the associated leakage effects. In this paper, SOI TRI-GATE FinFET structure with use of high K dielectric materials (HfO2) and SiO2 dielectric are simulated using the 3-D device simulator Devedit and Atlas of TCAD Silvaco. The simulated results exhibits significant improvements in the performances of SOI TRI GATE FinFET with gate oxide HfO2 compared with conventional gate oxide SiO2 for the same structure. SOI TRI-GATE FinFET structure with the use of high K materials (HfO2) in gate oxide results into the increase in saturation current, threshold voltage, on-state current and Ion/Ioff ratio while off-state current, subthreshold slope and DIBL effect are decreased. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=technology%20SOI" title="technology SOI">technology SOI</a>, <a href="https://publications.waset.org/abstracts/search?q=short-channel%20effects%20%28SCEs%29" title=" short-channel effects (SCEs)"> short-channel effects (SCEs)</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-gate%20SOI%20MOSFET" title=" multi-gate SOI MOSFET"> multi-gate SOI MOSFET</a>, <a href="https://publications.waset.org/abstracts/search?q=SOI-TRI%20Gate%20FinFET" title=" SOI-TRI Gate FinFET"> SOI-TRI Gate FinFET</a>, <a href="https://publications.waset.org/abstracts/search?q=high-K%20dielectric" title=" high-K dielectric"> high-K dielectric</a>, <a href="https://publications.waset.org/abstracts/search?q=Silvaco%20software" title=" Silvaco software"> Silvaco software</a> </p> <a href="https://publications.waset.org/abstracts/31441/performance-improvement-of-soi-tri-gate-finfet-transistor-using-high-k-dielectric-with-metal-gate" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31441.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">347</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">17151</span> Ternary Content Addressable Memory Cell with a Leakage Reduction Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gagnesh%20Kumar">Gagnesh Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Nitin%20Gupta"> Nitin Gupta</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ternary Content Addressable Memory cells are mainly popular in network routers for packet forwarding and packet classification, but they are also useful in a variety of other applications that require high-speed table look-up. The main TCAM-design challenge is to decrease the power consumption associated with the large amount of parallel active circuitry, without compromising with speed or memory density. Furthermore, when the channel length decreases, leakage power becomes more significant, and it can even dominate dynamic power at lower technologies. In this paper, we propose a TCAM-design technique, called Virtual Power Supply technique that reduces the leakage by a substantial amount. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=match%20line%20%28ML%29" title="match line (ML)">match line (ML)</a>, <a href="https://publications.waset.org/abstracts/search?q=search%20line%20%28SL%29" title=" search line (SL)"> search line (SL)</a>, <a href="https://publications.waset.org/abstracts/search?q=ternary%20content%20addressable%20memory%20%28TCAM%29" title=" ternary content addressable memory (TCAM)"> ternary content addressable memory (TCAM)</a>, <a href="https://publications.waset.org/abstracts/search?q=Leakage%20power%20%28LP%29" title=" Leakage power (LP)"> Leakage power (LP)</a> </p> <a href="https://publications.waset.org/abstracts/52223/ternary-content-addressable-memory-cell-with-a-leakage-reduction-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52223.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">299</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">17150</span> Fabrication of InGaAs P-I-N Micro-Photodiode Sensor Array</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jyun-Hao%20Liao">Jyun-Hao Liao</a>, <a href="https://publications.waset.org/abstracts/search?q=Chien-Ju%20Chen"> Chien-Ju Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Chia-Jui%20Yu"> Chia-Jui Yu</a>, <a href="https://publications.waset.org/abstracts/search?q=Meng%20Chyi%20Wu"> Meng Chyi Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Chia-Ching%20Wu"> Chia-Ching Wu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this letter, we reported the fabrication of InGaAs micro-photodiode sensor array with the rapid thermal diffusion (RTD) technique. The spin-on dopant source Zn was used to form the p-type region in InP layer. Through the RTD technique, the InP/InGaAs heterostructure was formed. We improved our fabrication on the p-i-n photodiode to micro size which pixel is 7.8um, and the pitch is 12.8um. The proper SiNx was deposited to form the passivation layer. The leakage current of single pixel decrease to 3.3pA at -5V, and 35fA at -10mV. The leakage current densities of each voltage are 21uA/cm² at -5V and 0.223uA/cm² at -10mV. As we focus on the wavelength from 0.9um to 1.7um, the optimized Si/Al₂O₃ bilayers are deposited to form the AR-coating. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=InGaAs" title="InGaAs">InGaAs</a>, <a href="https://publications.waset.org/abstracts/search?q=micro%20sensor%20array" title=" micro sensor array"> micro sensor array</a>, <a href="https://publications.waset.org/abstracts/search?q=p-i-n%20photodiode" title=" p-i-n photodiode"> p-i-n photodiode</a>, <a href="https://publications.waset.org/abstracts/search?q=rapid%20thermal%20diffusion" title=" rapid thermal diffusion"> rapid thermal diffusion</a>, <a href="https://publications.waset.org/abstracts/search?q=Zn%20diffusion" title=" Zn diffusion"> Zn diffusion</a> </p> <a href="https://publications.waset.org/abstracts/73769/fabrication-of-ingaas-p-i-n-micro-photodiode-sensor-array" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73769.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">318</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">17149</span> Unsteady Numerical Analysis of Sediment Erosion Affected High Head Francis Turbine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saroj%20Gautam">Saroj Gautam</a>, <a href="https://publications.waset.org/abstracts/search?q=Ram%20Lama"> Ram Lama</a>, <a href="https://publications.waset.org/abstracts/search?q=Hari%20Prasad%20Neopane"> Hari Prasad Neopane</a>, <a href="https://publications.waset.org/abstracts/search?q=Sailesh%20Chitrakar"> Sailesh Chitrakar</a>, <a href="https://publications.waset.org/abstracts/search?q=Biraj%20Singh%20Thapa"> Biraj Singh Thapa</a>, <a href="https://publications.waset.org/abstracts/search?q=Baoshan%20Zhu"> Baoshan Zhu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sediment flowing along with the water in rivers flowing in South Asia erodes the turbine components. The erosion of turbine components is influenced by the nature of fluid flow along with components of typical turbine types. This paper examines two cases of high head Francis turbines with the same speed number numerically. The numerical investigation involves both steady-state and transient analysis of the numerical model developed for both cases. Furthermore, the influence of leakage flow from the clearance gap of guide vanes is also examined and compared with no leakage flow. It presents the added pressure pulsation to rotor-stator-interaction in the turbine runner for both cases due to leakage flow. It was also found that leakage flow was a major contributor to the sediment erosion in those turbines. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sediment%20erosion" title="sediment erosion">sediment erosion</a>, <a href="https://publications.waset.org/abstracts/search?q=Francis%20turbine" title=" Francis turbine"> Francis turbine</a>, <a href="https://publications.waset.org/abstracts/search?q=leakage%20flow" title=" leakage flow"> leakage flow</a>, <a href="https://publications.waset.org/abstracts/search?q=rotor%20stator%20interaction" title=" rotor stator interaction"> rotor stator interaction</a> </p> <a href="https://publications.waset.org/abstracts/121266/unsteady-numerical-analysis-of-sediment-erosion-affected-high-head-francis-turbine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/121266.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">185</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">17148</span> Harmonic Distortion Caused by Electric Bus Battery Charger in Alexandria Distribution System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Elhosieny%20Aly%20Ismail">Mohamed Elhosieny Aly Ismail</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper illustrates the total voltage and current harmonic distortion impact caused by fast-charging an electric bus and maintaining standard limit compliance. Measuring the current harmonic level in the range of 2 kHz-9 kHz. Also, the impact of the total demand distortions current caused by fast charger electric bus on the utility by measuring at the point of common coupling and comparing the measurement with IEEE519 -2014 standard. The results show that the total harmonic current distortion for the charger is within the limits of IEC 61000-3-12 and the fifth harmonic current was the most dominant frequency then the seventh harmonic current. The harmonic current in the range of 2 kHz- 9 kHz shows the frequency 5.1kHz is the most dominant frequency. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electric%20vehicle" title="electric vehicle">electric vehicle</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20harmonic%20distortion" title=" total harmonic distortion"> total harmonic distortion</a>, <a href="https://publications.waset.org/abstracts/search?q=IEEE519-2014" title=" IEEE519-2014"> IEEE519-2014</a>, <a href="https://publications.waset.org/abstracts/search?q=IEC%2061000-3-12" title=" IEC 61000-3-12"> IEC 61000-3-12</a>, <a href="https://publications.waset.org/abstracts/search?q=super%20harmonic%20distortion" title=" super harmonic distortion"> super harmonic distortion</a> </p> <a href="https://publications.waset.org/abstracts/177738/harmonic-distortion-caused-by-electric-bus-battery-charger-in-alexandria-distribution-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/177738.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">101</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">17147</span> Determination of Inactivation and Recovery of Saccharomyces cerevisiae Cells after the Gas-Phase Plasma Treatment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Z.%20Herceg">Z. Herceg</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Stulic"> V. Stulic</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Vukusic"> T. Vukusic</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Rezek%20Jambrak"> A. Rezek Jambrak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Gas phase plasma treatment is a new nonthermal technology used for food and water decontamination. In this study, we have investigated influence of the gas phase plasma treatment on yeast cells of S. cerevisiae. Sample was composed of 10 mL of yeast suspension and 190 mL of 0.01 M NaNO₃ with a medium conductivity of 100 µS/cm. Samples were treated in a glass reactor with a point- to-plate electrode configuration (high voltage electrode-titanium wire in the gas phase and grounded electrode in the liquid phase). Air or argon were injected into the headspace of the reactor at the gas flow of 5 L/min. Frequency of 60, 90 and 120 Hz, time of 5 and 10 min and positive polarity were defined parameters. Inactivation was higher with the applied higher frequency, longer treatment time and injected argon. Inactivation was not complete which resulted in complete recovery. Cellular leakage (260 nm and 280 nm) was higher with a longer treatment time and higher frequency. Leakage at 280 nm which defines a leakage of proteins was higher than leakage at 260 nm which defines a leakage of nucleic acids. The authors would like to acknowledge the support by Croatian Science Foundation and research project 'Application of electrical discharge plasma for preservation of liquid foods'. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saccharomyces%20cerevisiae" title="Saccharomyces cerevisiae">Saccharomyces cerevisiae</a>, <a href="https://publications.waset.org/abstracts/search?q=inactivation" title=" inactivation"> inactivation</a>, <a href="https://publications.waset.org/abstracts/search?q=gas-phase%20plasma%20treatment" title=" gas-phase plasma treatment"> gas-phase plasma treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=cellular%20leakage" title=" cellular leakage"> cellular leakage</a> </p> <a href="https://publications.waset.org/abstracts/90155/determination-of-inactivation-and-recovery-of-saccharomyces-cerevisiae-cells-after-the-gas-phase-plasma-treatment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90155.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">202</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">17146</span> UNIX Source Code Leak: Evaluation and Feasible Solutions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gu%20Dongxing">Gu Dongxing</a>, <a href="https://publications.waset.org/abstracts/search?q=Li%20Yuxuan"> Li Yuxuan</a>, <a href="https://publications.waset.org/abstracts/search?q=Nong%20Tengxiao"> Nong Tengxiao</a>, <a href="https://publications.waset.org/abstracts/search?q=Burra%20Venkata%20Durga%20Kumar"> Burra Venkata Durga Kumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Since computers are widely used in business models, more and more companies choose to store important information in computers to improve productivity. However, this information can be compromised in many cases, such as when it is stored locally on the company's computers or when it is transferred between servers and clients. Of these important information leaks, source code leaks are probably the most costly. Because the source code often represents the core technology of the company, especially for the Internet companies, source code leakage may even lead to the company's core products lose market competitiveness, and then lead to the bankruptcy of the company. In recent years, such as Microsoft, AMD and other large companies have occurred source code leakage events, suffered a huge loss. This reveals to us the importance and necessity of preventing source code leakage. This paper aims to find ways to prevent source code leakage based on the direction of operating system, and based on the fact that most companies use Linux or Linux-like system to realize the interconnection between server and client, to discuss how to reduce the possibility of source code leakage during data transmission. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=data%20transmission" title="data transmission">data transmission</a>, <a href="https://publications.waset.org/abstracts/search?q=Linux" title=" Linux"> Linux</a>, <a href="https://publications.waset.org/abstracts/search?q=source%20code" title=" source code"> source code</a>, <a href="https://publications.waset.org/abstracts/search?q=operating%20system" title=" operating system"> operating system</a> </p> <a href="https://publications.waset.org/abstracts/153161/unix-source-code-leak-evaluation-and-feasible-solutions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/153161.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">270</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">17145</span> Magnetic End Leakage Flux in a Spoke Type Rotor Permanent Magnet Synchronous Generator</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Petter%20Eklund">Petter Eklund</a>, <a href="https://publications.waset.org/abstracts/search?q=Jonathan%20Sj%C3%B6lund"> Jonathan Sjölund</a>, <a href="https://publications.waset.org/abstracts/search?q=Sandra%20Eriksson"> Sandra Eriksson</a>, <a href="https://publications.waset.org/abstracts/search?q=Mats%20Leijon"> Mats Leijon</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The spoke type rotor can be used to obtain magnetic flux concentration in permanent magnet machines. This allows the air gap magnetic flux density to exceed the remanent flux density of the permanent magnets but gives problems with leakage fluxes in the magnetic circuit. The end leakage flux of one spoke type permanent magnet rotor design is studied through measurements and finite element simulations. The measurements are performed in the end regions of a 12 kW prototype generator for a vertical axis wind turbine. The simulations are made using three dimensional finite elements to calculate the magnetic field distribution in the end regions of the machine. Also two dimensional finite element simulations are performed and the impact of the two dimensional approximation is studied. It is found that the magnetic leakage flux in the end regions of the machine is equal to about 20% of the flux in the permanent magnets. The overestimation of the performance by the two dimensional approximation is quantified and a curve-fitted expression for its behavior is suggested. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=end%20effects" title="end effects">end effects</a>, <a href="https://publications.waset.org/abstracts/search?q=end%20leakage%20flux" title=" end leakage flux"> end leakage flux</a>, <a href="https://publications.waset.org/abstracts/search?q=permanent%20magnet%20machine" title=" permanent magnet machine"> permanent magnet machine</a>, <a href="https://publications.waset.org/abstracts/search?q=spoke%20type%20rotor" title=" spoke type rotor"> spoke type rotor</a> </p> <a href="https://publications.waset.org/abstracts/65632/magnetic-end-leakage-flux-in-a-spoke-type-rotor-permanent-magnet-synchronous-generator" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65632.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">332</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">17144</span> Improved Performance of AlGaN/GaN HEMTs Using N₂/NH₃ Pretreatment before Passivation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yifan%20Gao">Yifan Gao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Owing to the high breakdown field, high saturation drift velocity, 2DEG with high density and mobility and so on, AlGaN/GaN HEMTs have been widely used in high-frequency and high-power applications. To acquire a higher power often means higher breakdown voltage and higher drain current. Surface leakage current is usually the key issue affecting the breakdown voltage and power performance. In this work, we have performed in-situ N₂/NH₃ pretreatment before the passivation to suppress the surface leakage and achieve device performance enhancement. The AlGaN/GaN HEMT used in this work was grown on a 3-in. SiC substrate, whose epitaxial structure consists of a 3.5-nm GaN cap layer, a 25-nm Al₀.₂₅GaN barrier layer, a 1-nm AlN layer, a 400-nm i-GaN layer and a buffer layer. In order to analyze the mechanism for the N-based pretreatment, the details are measured by XPS analysis. It is found that the intensity of Ga-O bonds is decreasing and the intensity of Ga-N bonds is increasing, which means with the supplement of N, the dangling bonds on the surface are indeed reduced with the forming of Ga-N bonds, reducing the surface states. The surface states have a great influence on the leakage current, and improved surface states represent a better off-state of the device. After the N-based pretreatment, the breakdown voltage of the device with Lₛ𝒹=6 μm increased from 93V to 170V, which increased by 82.8%. Moreover, for HEMTs with Lₛ𝒹 of 6-μm, we can obtain a peak output power (Pout) of 12.79W/mm, power added efficiency (PAE) of 49.84% and a linear gain of 20.2 dB at 60V under 3.6GHz. Comparing the result with the reference 6-μm device, Pout is increased by 16.5%. Meanwhile, PAE and the linear gain also have a slight increase. The experimental results indicate that using N₂/NH₃ pretreatment before passivation is an attractive approach to achieving power performance enhancement. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AlGaN%2FGaN%20HEMT" title="AlGaN/GaN HEMT">AlGaN/GaN HEMT</a>, <a href="https://publications.waset.org/abstracts/search?q=N-based%20pretreatment" title=" N-based pretreatment"> N-based pretreatment</a>, <a href="https://publications.waset.org/abstracts/search?q=output%20power" title=" output power"> output power</a>, <a href="https://publications.waset.org/abstracts/search?q=passivation" title=" passivation"> passivation</a> </p> <a href="https://publications.waset.org/abstracts/159861/improved-performance-of-algangan-hemts-using-n2nh3-pretreatment-before-passivation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/159861.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">317</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">17143</span> Time-Interval between Rectal Cancer Surgery and Reintervention for Anastomotic Leakage and the Effects of a Defunctioning Stoma: A Dutch Population-Based Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anne-Loes%20K.%20Warps">Anne-Loes K. Warps</a>, <a href="https://publications.waset.org/abstracts/search?q=Rob%20A.%20E.%20M.%20Tollenaar"> Rob A. E. M. Tollenaar</a>, <a href="https://publications.waset.org/abstracts/search?q=Pieter%20J.%20Tanis"> Pieter J. Tanis</a>, <a href="https://publications.waset.org/abstracts/search?q=Jan%20Willem%20T.%20Dekker"> Jan Willem T. Dekker</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Anastomotic leakage after colorectal cancer surgery remains a severe complication. Early diagnosis and treatment are essential to prevent further adverse outcomes. In the literature, it has been suggested that earlier reintervention is associated with better survival, but anastomotic leakage can occur with a highly variable time interval to index surgery. This study aims to evaluate the time-interval between rectal cancer resection with primary anastomosis creation and reoperation, in relation to short-term outcomes, stratified for the use of a defunctioning stoma. Methods: Data of all primary rectal cancer patients that underwent elective resection with primary anastomosis during 2013-2019 were extracted from the Dutch ColoRectal Audit. Analyses were stratified for defunctioning stoma. Anastomotic leakage was defined as a defect of the intestinal wall or abscess at the site of the colorectal anastomosis for which a reintervention was required within 30 days. Primary outcomes were new stoma construction, mortality, ICU admission, prolonged hospital stay and readmission. The association between time to reoperation and outcome was evaluated in three ways: Per 2 days, before versus on or after postoperative day 5 and during primary versus readmission. Results: In total 10,772 rectal cancer patients underwent resection with primary anastomosis. A defunctioning stoma was made in 46.6% of patients. These patients had a lower anastomotic leakage rate (8.2% vs. 11.6%, p < 0.001) and less often underwent a reoperation (45.3% vs. 88.7%, p < 0.001). Early reoperations (< 5 days) had the highest complication and mortality rate. Thereafter the distribution of adverse outcomes was more spread over the 30-day postoperative period for patients with a defunctioning stoma. Median time-interval from primary resection to reoperation for defunctioning stoma patients was 7 days (IQR 4-14) versus 5 days (IQR 3-13 days) for no-defunctioning stoma patients. The mortality rate after primary resection and reoperation were comparable (resp. for defunctioning vs. no-defunctioning stoma 1.0% vs. 0.7%, P=0.106 and 5.0% vs. 2.3%, P=0.107). Conclusion: This study demonstrated that early reinterventions after anastomotic leakage are associated with worse outcomes (i.e. mortality). Maybe the combination of a physiological dip in the cellular immune response and release of cytokines following surgery, as well as a release of endotoxins caused by the bacteremia originating from the leakage, leads to a more profound sepsis. Another explanation might be that early leaks are not contained to the pelvis, leading to a more profound sepsis requiring early reoperations. Leakage with or without defunctioning stoma resulted in a different type of reinterventions and time-interval between surgery and reoperation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rectal%20cancer%20surgery" title="rectal cancer surgery">rectal cancer surgery</a>, <a href="https://publications.waset.org/abstracts/search?q=defunctioning%20stoma" title=" defunctioning stoma"> defunctioning stoma</a>, <a href="https://publications.waset.org/abstracts/search?q=anastomotic%20leakage" title=" anastomotic leakage"> anastomotic leakage</a>, <a href="https://publications.waset.org/abstracts/search?q=time-interval%20to%20reoperation" title=" time-interval to reoperation"> time-interval to reoperation</a> </p> <a href="https://publications.waset.org/abstracts/134233/time-interval-between-rectal-cancer-surgery-and-reintervention-for-anastomotic-leakage-and-the-effects-of-a-defunctioning-stoma-a-dutch-population-based-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134233.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">138</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">17142</span> Numerical and Experimental Investigation of Impeller Trimming on Fluid Flow inside a Centrifugal Pump</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rouhollah%20Torabi">Rouhollah Torabi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ashkan%20Chavoshi"> Ashkan Chavoshi</a>, <a href="https://publications.waset.org/abstracts/search?q=Sheyda%20Almasi"> Sheyda Almasi</a>, <a href="https://publications.waset.org/abstracts/search?q=Shima%20Almasi"> Shima Almasi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper the effect of impeller trim on centrifugal pump performance is studied and the most important effect which is decreasing the flow rate, differential head and efficiency is analyzed. For this case a low specific speed centrifugal pump is simulated with CFD. Total flow inside the pump including the secondary flow in sidewall gap which form internal leakage is modeled simultaneously in CFX software. The flow field in different area of pumps such as inside impeller, volute, balance holes and leakage through wear rings are studied. To validate the results experimental tests are done for various impeller diameters. Results also compared with analytic equations which predict pump performance with trimmed impeller. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=centrifugal%20pump" title="centrifugal pump">centrifugal pump</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD" title=" CFD"> CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=impeller" title=" impeller"> impeller</a>, <a href="https://publications.waset.org/abstracts/search?q=trim" title=" trim"> trim</a> </p> <a href="https://publications.waset.org/abstracts/24849/numerical-and-experimental-investigation-of-impeller-trimming-on-fluid-flow-inside-a-centrifugal-pump" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24849.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">414</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">17141</span> Design and Analysis of Highly Efficient and Reliable Single-Phase Transformerless Inverter for PV Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=L.%20Ashok%20Kumar">L. Ashok Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Sujith%20Kumar"> N. Sujith Kumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Most of the PV systems are designed with transformer for safety purpose with galvanic isolation. However, the transformer is big, heavy and expensive. Also, it reduces the overall frequency of the conversion stage. Generally PV inverter with transformer is having efficiency around 92%–94% only. To overcome these problems, transformerless PV system is introduced. It is smaller, lighter, cheaper and higher in efficiency. However, dangerous leakage current will flow between PV array and the grid due to the stray capacitance. There are different types of configurations available for transformerless inverters like H5, H6, HERIC, oH5, and Dual paralleled buck inverter. But each configuration is suffering from its own disadvantages like high conduction losses, shoot-through issues of switches, dead-time requirements at zero crossing instants of grid voltage to avoid grid shoot-through faults and MOSFET reverse recovery issues. The main objective of the proposed transformerless inverter is to address two key issues: One key issue for a transformerless inverter is that it is necessary to achieve high efficiency compared to other existing inverter topologies. Another key issue is that the inverter configuration should not have any shoot-through issues for higher reliability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=grid-connected" title="grid-connected">grid-connected</a>, <a href="https://publications.waset.org/abstracts/search?q=photovoltaic%20%28PV%29%20systems" title=" photovoltaic (PV) systems"> photovoltaic (PV) systems</a>, <a href="https://publications.waset.org/abstracts/search?q=transformerless%20inverter" title=" transformerless inverter"> transformerless inverter</a>, <a href="https://publications.waset.org/abstracts/search?q=stray%20capacitance" title=" stray capacitance"> stray capacitance</a>, <a href="https://publications.waset.org/abstracts/search?q=common-mode" title=" common-mode"> common-mode</a>, <a href="https://publications.waset.org/abstracts/search?q=leakage%20current" title=" leakage current"> leakage current</a>, <a href="https://publications.waset.org/abstracts/search?q=pulse%20width%20modulation%20%28PWM%29" title=" pulse width modulation (PWM)"> pulse width modulation (PWM)</a> </p> <a href="https://publications.waset.org/abstracts/8041/design-and-analysis-of-highly-efficient-and-reliable-single-phase-transformerless-inverter-for-pv-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8041.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">501</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">17140</span> Low Power CNFET SRAM Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pejman%20Hosseiniun">Pejman Hosseiniun</a>, <a href="https://publications.waset.org/abstracts/search?q=Rose%20Shayeghi"> Rose Shayeghi</a>, <a href="https://publications.waset.org/abstracts/search?q=Iman%20Rahbari"> Iman Rahbari</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamad%20Reza%20Kalhor"> Mohamad Reza Kalhor</a> </p> <p class="card-text"><strong>Abstract:</strong></p> CNFET has emerged as an alternative material to silicon for high performance, high stability and low power SRAM design in recent years. SRAM functions as cache memory in computers and many portable devices. In this paper, a new SRAM cell design based on CNFET technology is proposed. The proposed SRAM cell design for CNFET is compared with SRAM cell designs implemented with the conventional CMOS and FinFET in terms of speed, power consumption, stability, and leakage current. The HSPICE simulation and analysis show that the dynamic power consumption of the proposed 8T CNFET SRAM cell’s is reduced about 48% and the SNM is widened up to 56% compared to the conventional CMOS SRAM structure at the expense of 2% leakage power and 3% write delay increase. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=SRAM%20cell" title="SRAM cell">SRAM cell</a>, <a href="https://publications.waset.org/abstracts/search?q=CNFET" title=" CNFET"> CNFET</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20power" title=" low power"> low power</a>, <a href="https://publications.waset.org/abstracts/search?q=HSPICE" title=" HSPICE "> HSPICE </a> </p> <a href="https://publications.waset.org/abstracts/7468/low-power-cnfet-sram-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7468.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">414</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">17139</span> Numerical Investigation of Gas Leakage in RCSW-Soil Combinations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Y.%20M.%20Ahmed">Mahmoud Y. M. Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Konsowa"> Ahmed Konsowa</a>, <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Sami"> Mostafa Sami</a>, <a href="https://publications.waset.org/abstracts/search?q=Ayman%20Mosallam"> Ayman Mosallam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fukushima nuclear accident (Japan 2011) has drawn attention to the issue of gas leakage from hazardous facilities through building boundaries. The rapidly increasing investments in nuclear stations have made the ability to predict, and prevent, gas leakage a rather crucial issue both environmentally and economically. Leakage monitoring for underground facilities is rather complicated due to the combination of Reinforced Concrete Shear Wall (RCSW) and soil. In the framework of a recent research conducted by the authors, the gas insulation capabilities of RCSW-soil combination have been investigated via a lab-scale experimental work. Despite their accuracy, experimental investigations are expensive, time-consuming, hazardous, and lack for flexibility. Numerically simulating the gas leakage as a fluid flow problem based on Computational Fluid Dynamics (CFD) modeling approach can provide a potential alternative. This novel implementation of CFD approach is the topic of the present paper. The paper discusses the aspects of modeling the gas flow through porous media that resemble the RCSW both isolated and combined with the normal soil. A commercial CFD package is utilized in simulating this fluid flow problem. A fixed RCSW layer thickness is proposed, air is taken as the leaking gas, whereas the soil layer is represented as clean sand with variable properties. The variable sand properties include sand layer thickness, fine fraction ratio, and moisture content. The CFD simulation results almost demonstrate what has been found experimentally. A soil layer attached next to a cracked reinforced concrete section plays a significant role in reducing the gas leakage from that cracked section. This role is found to be strongly dependent on the soil specifications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=RCSW" title="RCSW">RCSW</a>, <a href="https://publications.waset.org/abstracts/search?q=gas%20leakage" title=" gas leakage"> gas leakage</a>, <a href="https://publications.waset.org/abstracts/search?q=Pressure%20Decay%20Method" title=" Pressure Decay Method"> Pressure Decay Method</a>, <a href="https://publications.waset.org/abstracts/search?q=hazardous%20underground%20facilities" title=" hazardous underground facilities"> hazardous underground facilities</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD" title=" CFD"> CFD</a> </p> <a href="https://publications.waset.org/abstracts/24793/numerical-investigation-of-gas-leakage-in-rcsw-soil-combinations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24793.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">418</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">17138</span> Analysis of Weld Crack of Main Steam Governing Valve Steam Turbine Case </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sarakorn%20Sukaviriya">Sarakorn Sukaviriya</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper describes the inspection procedure, root cause analysis, the rectification of crack, and how to apply the procedure with other similar plants. During the operation of the steam turbine (620MW), instruments such as speed sensor of steam turbine, the servo valve of main stop valve and electrical wires were malfunction caused by leakage steam from main steam governing valve. Therefore, the power plant decided to shutdown steam turbines for figuring out the cause of leakage steam. Inspection techniques to be applied in this problem were microstructure testing (SEM), pipe stress analysis (FEM) and non-destructive testing. The crack was initially found on main governing valve’s weldment by visual inspection. To analyze more precisely, pipe stress analysis and microstructure testing were applied and results indicated that the crack was intergranular and originated from the weld defect. This weld defect caused the notch with high-stress concentration which created crack and then propagated to steam leakage. The major root cause of this problem was an inappropriate welding process, which created a weld defect. To repair this joint from damage, we used a welding technique by producing refinement of coarse grain HAZ and eliminating stress concentration. After the weldment was completely repaired, other adjacent weldments still had risk. Hence, to prevent any future cracks, non-destructive testing (NDT) shall be applied to all joints in order to ensure that there will be no indication of crack. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=steam-pipe%20leakage" title="steam-pipe leakage">steam-pipe leakage</a>, <a href="https://publications.waset.org/abstracts/search?q=steam%20leakage" title=" steam leakage"> steam leakage</a>, <a href="https://publications.waset.org/abstracts/search?q=weld%20crack%20analysis" title=" weld crack analysis"> weld crack analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=weld%20defect" title=" weld defect"> weld defect</a> </p> <a href="https://publications.waset.org/abstracts/116436/analysis-of-weld-crack-of-main-steam-governing-valve-steam-turbine-case" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/116436.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">133</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">17137</span> Effect of Highly Pressurized Dispersion Arc Nozzle on Breakup of Oil Leakage in Offshore</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20M.%20M.%20Ammar">N. M. M. Ammar</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20M.%20Mustaqim"> S. M. Mustaqim</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20M.%20Nadzir"> N. M. Nadzir</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The most important problem occurs on oil spills in sea water is to reduce the oil spills size. This study deals with the development of high pressurized nozzle using dispersion method for oil leakage in offshore. 3D numerical simulation results were obtained using ANSYS Fluent 13.0 code and correlate with the experimental data for validation. This paper studies the contribution of the process on flow speed and pressure of the flow from two different geometrical designs of nozzles and to generate a spray pattern suitable for dispersant application. Factor of size distribution of droplets generated by the nozzle is calculated using pressures ranging from 2 to 6 bars. Results obtain from both analyses shows a significant spray pattern and flow distribution as well as distance. Results also show a significant contribution on the effect of oil leakage in terms of the diameter of the oil spills break up. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=arc%20nozzle" title="arc nozzle">arc nozzle</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD%20simulation" title=" CFD simulation"> CFD simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=droplets" title=" droplets"> droplets</a>, <a href="https://publications.waset.org/abstracts/search?q=oil%20spills" title=" oil spills"> oil spills</a> </p> <a href="https://publications.waset.org/abstracts/8542/effect-of-highly-pressurized-dispersion-arc-nozzle-on-breakup-of-oil-leakage-in-offshore" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8542.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 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