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breakdown structure (ABS)</title> <meta name="description" content="Search results for: activity breakdown structure (ABS)"> <meta name="keywords" content="activity breakdown structure (ABS)"> <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 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method="get" 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="activity breakdown structure (ABS)"> <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> 13575</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: activity breakdown structure (ABS)</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13575</span> Effect of Supply Frequency on Pre-Breakdown and Breakdown Phenomena in Unbridged Vacuum Gaps</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=T.C.%20Balachandra">T.C. Balachandra</a>, <a href="https://publications.waset.org/abstracts/search?q=Habibuddin%20Shaik"> Habibuddin Shaik </a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents experimental results leading towards a better understanding of pre-breakdown and breakdown behavior of vacuum gaps under variable frequency alternating excitations. The frequency variation is in the range of 30 to 300 Hz in steps of 10 Hz for a fixed gap spacing of 0.5 mm. The results indicate that the pre-breakdown currents show an inverse relation with the breakdown voltage in general though erratic behavior was observed over a certain range of frequencies. A breakdown voltage peak was observed at 130 Hz. This was pronounced when the electrode pair was of stainless steel and less pronounced when copper and aluminum electrodes were used. The experimental results are explained based on F-N emission, I-F emission, and also thermal interaction due to quasi-continuous shower of anode micro-particles. Further, it is speculated that the ostensible cause for time delay between voltage and current peaks is due to the presence of neutral molecules in the gap. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anode%20hot-spots" title="anode hot-spots">anode hot-spots</a>, <a href="https://publications.waset.org/abstracts/search?q=F-N%20emission" title=" F-N emission"> F-N emission</a>, <a href="https://publications.waset.org/abstracts/search?q=I-F%20emission" title=" I-F emission"> I-F emission</a>, <a href="https://publications.waset.org/abstracts/search?q=microparticle" title=" microparticle"> microparticle</a>, <a href="https://publications.waset.org/abstracts/search?q=neutral%20molecules" title=" neutral molecules"> neutral molecules</a>, <a href="https://publications.waset.org/abstracts/search?q=pre-breakdown%20conduction" title=" pre-breakdown conduction"> pre-breakdown conduction</a>, <a href="https://publications.waset.org/abstracts/search?q=vacuum%20breakdown" title=" vacuum breakdown"> vacuum breakdown</a> </p> <a href="https://publications.waset.org/abstracts/114665/effect-of-supply-frequency-on-pre-breakdown-and-breakdown-phenomena-in-unbridged-vacuum-gaps" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/114665.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">162</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">13574</span> Unsteady Characteristics Investigation on the Precessing Vortex Breakdown and Energy Separation in a Vortex Tube</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Xiangji%20Guo">Xiangji Guo</a>, <a href="https://publications.waset.org/abstracts/search?q=Bo%20Zhang"> Bo Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the phenomenon of vortex breakdown in a vortex tube was analyzed within the scope of unsteady character in swirl flows. A 3-D Unsteady Reynolds-averaged Navier–Stokes (URANS) closed by the Reynolds Stress Model (RSM) was adopted to simulate the large-scale vortex structure in vortex tube, and the numerical model was verified by the steady results. The swirl number was calculated for the vortex tube and the flow field was classed as strong swirl flow. According to the results, a time-dependent spiral flow field gyrates around a central recirculation zone which is precessing around the axis of the tube, and manifests the flow structure is the spiral type (S-type) vortex breakdown. The vortex breakdown is crucial for the formation of the central recirculation zone (CRZ), a further discussion was about the affection on CRZ with the different external conditions of vortex tube, the study on the unsteady characters was expected to hope to design of vortex tube and analyze the energy separation effect. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vortex%20tube" title="vortex tube">vortex tube</a>, <a href="https://publications.waset.org/abstracts/search?q=vortex%20breakdown" title=" vortex breakdown"> vortex breakdown</a>, <a href="https://publications.waset.org/abstracts/search?q=central%20recirculation%20zone" title=" central recirculation zone"> central recirculation zone</a>, <a href="https://publications.waset.org/abstracts/search?q=unsteady" title=" unsteady"> unsteady</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20separation" title=" energy separation"> energy separation</a> </p> <a href="https://publications.waset.org/abstracts/52531/unsteady-characteristics-investigation-on-the-precessing-vortex-breakdown-and-energy-separation-in-a-vortex-tube" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52531.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">13573</span> Fabrication of High-Power AlGaN/GaN Schottky Barrier Diode with Field Plate Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <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=Chien-Ju%20Chen"> Chien-Ju Chen</a>, <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=Chia-Ching%20Wu"> Chia-Ching Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Meng-Chyi%20Wu"> Meng-Chyi Wu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this letter, we demonstrate high-performance AlGaN/GaN planar Schottky barrier diodes (SBDs) on the silicon substrate with field plate structure for increasing breakdown voltage <em>V</em><sub>B</sub>. A low turn-on resistance R<sub>ON</sub> (3.55 mΩ-cm<sup>2</sup>), low reverse leakage current (< 0.1 µA) at -100 V, and high reverse breakdown voltage <em>V</em><sub>B</sub> (> 1.1 kV) SBD has been fabricated. A virgin SBD exhibited a breakdown voltage (measured at 1 mA/mm) of 615 V, and with the field plate technology device exhibited a breakdown voltage (measured at 1 mA/mm) of 1525 V (the anode–cathode distance was L<sub>AC</sub> = 40 µm). Devices without the field plate design exhibit a Baliga’s figure of merit of <em>V</em><sub>B</sub><sup>2</sup>/ R<sub>ON</sub> = 60.2 MW/cm<sup>2</sup>, whereas devices with the field plate design show a Baliga’s figure of merit of <em>V</em><sub>B</sub><sup>2</sup>/ R<sub>ON</sub> = 340.9 MW/cm<sup>2</sup> (the anode–cathode distance was L<sub>AC</sub> = 20 µm). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AlGaN%2FGaN%20heterostructure" title="AlGaN/GaN heterostructure">AlGaN/GaN heterostructure</a>, <a href="https://publications.waset.org/abstracts/search?q=silicon%20substrate" title=" silicon substrate"> silicon substrate</a>, <a href="https://publications.waset.org/abstracts/search?q=Schottky%20barrier%20diode%20%28SBD%29" title=" Schottky barrier diode (SBD)"> Schottky barrier diode (SBD)</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20breakdown%20voltage" title=" high breakdown voltage"> high breakdown voltage</a>, <a href="https://publications.waset.org/abstracts/search?q=Baliga%E2%80%99s%20figure-of-merit" title=" Baliga’s figure-of-merit"> Baliga’s figure-of-merit</a>, <a href="https://publications.waset.org/abstracts/search?q=field%20plate" title=" field plate"> field plate</a> </p> <a href="https://publications.waset.org/abstracts/73759/fabrication-of-high-power-algangan-schottky-barrier-diode-with-field-plate-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73759.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">306</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13572</span> Development of Work Breakdown Structure for EVMS in South Korea </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dong-Ho%20Kim">Dong-Ho Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Su-Sang%20Lim"> Su-Sang Lim</a>, <a href="https://publications.waset.org/abstracts/search?q=Sang-Won%20Han"> Sang-Won Han</a>, <a href="https://publications.waset.org/abstracts/search?q=Chang-Taek%20Hyun"> Chang-Taek Hyun</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the construction site, the cost and schedules are the most important management elements. Despite efforts to integrated management the cost and schedule, WBS classification is struggling to differ from each other. The cost and schedule can be integrated and can be managed due to the characteristic of the detail system in the case of Korea around the axis of pressure and official fixture system. In this research, the Work Breakdown Structure (WBS) integrating the cost and schedules around in government office construction, WBS which can be used in common was presented in order to analyze the detail system of the public institution construction and improve. As to this method, the efficient administration of not only the link application of the cost and schedule but also construction project is expected. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=WBS" title="WBS">WBS</a>, <a href="https://publications.waset.org/abstracts/search?q=EVMS" title=" EVMS"> EVMS</a>, <a href="https://publications.waset.org/abstracts/search?q=integrated%20cost%20and%20schedule" title=" integrated cost and schedule"> integrated cost and schedule</a>, <a href="https://publications.waset.org/abstracts/search?q=Korea%20case" title=" Korea case"> Korea case</a> </p> <a href="https://publications.waset.org/abstracts/32470/development-of-work-breakdown-structure-for-evms-in-south-korea" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32470.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">384</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">13571</span> Study on Breakdown Voltage Characteristics of Different Types of Oils with Contaminations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C.%20Jouhar">C. Jouhar</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Rajesh%20Kamath"> B. Rajesh Kamath</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20K.%20Veeraiah"> M. K. Veeraiah</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Z.%20Kurian"> M. Z. Kurian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Since long time ago, petroleum-based mineral oils have been used for liquid insulation in high voltage equipments. Mineral oils are widely used as insulation for transmission and distribution power transformers, capacitors and other high voltage equipment. Petroleum-based insulating oils have excellent dielectric properties such as high electric field strength, low dielectric losses and good long-term performance. Due to environmental consideration, an attempt to search the alternate liquid insulation is required. The influence of particles on the voltage breakdown in insulating oil and other liquids has been recognized for many years. Particles influence both AC and DC voltage breakdown in insulating oil. Experiments are conducted under AC voltage. The breakdown process starts with a microscopic bubble, an area of large distance where ions or electrons initiate avalanches. Insulating liquids drive their dielectric strength from the much higher density compare to gases. Experiments are carried out under High Voltage AC (HVAC) in different types of oils namely castor oil, vegetable oil and mineral oil. The Breakdown Voltage (BDV) with presence of moisture and particle contamination in different types of oils is studied. The BDV of vegetable oil is better when compared to other oils without contamination. The BDV of mineral oil is better when compared to other types of oils in presence of contamination. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=breakdown%20voltage" title="breakdown voltage">breakdown voltage</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20voltage%20AC" title=" high voltage AC"> high voltage AC</a>, <a href="https://publications.waset.org/abstracts/search?q=insulating%20oil" title=" insulating oil"> insulating oil</a>, <a href="https://publications.waset.org/abstracts/search?q=oil%20breakdown" title=" oil breakdown"> oil breakdown</a> </p> <a href="https://publications.waset.org/abstracts/52370/study-on-breakdown-voltage-characteristics-of-different-types-of-oils-with-contaminations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52370.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">13570</span> Diagnostic of Breakdown in High Voltage Bushing Power Transformer 500 kV Cirata Substation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Andika%20Bagaskara">Andika Bagaskara</a>, <a href="https://publications.waset.org/abstracts/search?q=Andhika%20Rizki%20Pratama"> Andhika Rizki Pratama</a>, <a href="https://publications.waset.org/abstracts/search?q=Lalu%20Arya%20Repatmaja"> Lalu Arya Repatmaja</a>, <a href="https://publications.waset.org/abstracts/search?q=Septhian%20Ditaputra%20Raharja"> Septhian Ditaputra Raharja</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The power transformer is one of the critical things in system transmission. Regular testing of the power transformer is very important to maintain the reliability of the power. One of the causes of the failure of the transformer is the breakdown of insulation caused by the presence of voids in the equipment that is electrified. As a result of the voids that occur in this power transformer equipment, it can cause partial discharge. Several methods were used to determine the occurrence of damage to the power transformer equipment, such as Sweep Frequency Response Analysis (SFRA) and Tan Delta. In Inter Bus Transformer (IBT) 500/150 kV Cirata Extra High Voltage (EHV) Substation, a breakdown occurred in the T-phase tertiary bushing. From the lessons learned in this case, a complete electrical test was carried out. From the results of the complete electrical test, there was a suspicion of deterioration in the post-breakdown SFRA results. After overhaul and inspection, traces of voids were found on the tertiary bushing, which indicated a breakdown in the tertiary bushing of the IBT 500/150kV Cirata Substation transformer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=void" title="void">void</a>, <a href="https://publications.waset.org/abstracts/search?q=bushing" title=" bushing"> bushing</a>, <a href="https://publications.waset.org/abstracts/search?q=SFRA" title=" SFRA"> SFRA</a>, <a href="https://publications.waset.org/abstracts/search?q=Tan%20Delta" title=" Tan Delta"> Tan Delta</a> </p> <a href="https://publications.waset.org/abstracts/158237/diagnostic-of-breakdown-in-high-voltage-bushing-power-transformer-500-kv-cirata-substation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/158237.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">141</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">13569</span> Breakdown Voltage Measurement of High Voltage Transformers Oils Using an Active Microwave Resonator Sensor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20A.%20Al-Mudhafar">Ahmed A. Al-Mudhafar</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20A.%20Abduljabar"> Ali A. Abduljabar</a>, <a href="https://publications.waset.org/abstracts/search?q=Hayder%20Jawad%20Albattat"> Hayder Jawad Albattat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work suggests a new microwave resonator sensor (MRS) device for measuring the oil’s breakdown voltage of high voltage transformers. A precise high-sensitivity sensor is designed and manufactured based on a microstrip split ring resonator (SRR). To improve the sensor sensitivity, a RF amplifier of 30 dB gain is linked through a transmission line of 50Ω.The sensor operates at a microwave band (L) with a quality factor of 1.35x105 when it is loaded with an empty tube. In this work, the sensor has been tested with three samples of high voltage transformer oil of different ages (new, middle, and damaged) where the quality factor differs with each sample. A mathematical model was built to calculate the breakdown voltage of the transformer oils and the accuracy of the results was higher than 90%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20resonator%20sensor" title="active resonator sensor">active resonator sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=oil%20breakdown%20voltage" title=" oil breakdown voltage"> oil breakdown voltage</a>, <a href="https://publications.waset.org/abstracts/search?q=transformers%20oils" title=" transformers oils"> transformers oils</a>, <a href="https://publications.waset.org/abstracts/search?q=quality%20factor" title=" quality factor"> quality factor</a> </p> <a href="https://publications.waset.org/abstracts/157297/breakdown-voltage-measurement-of-high-voltage-transformers-oils-using-an-active-microwave-resonator-sensor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157297.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">269</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">13568</span> Principles of Risk Management in Surgery Department</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20H.%20Yarmohammadian">Mohammad H. Yarmohammadian</a>, <a href="https://publications.waset.org/abstracts/search?q=Masoud%20Ferdosi"> Masoud Ferdosi</a>, <a href="https://publications.waset.org/abstracts/search?q=Abbas%20Haghshenas"> Abbas Haghshenas</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatemeh%20Rezaei"> Fatemeh Rezaei</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Surgical procedures aim at preserving human life and improving quality of their life. However, there are many potential risk sources that can cause serious harm to patients. For centuries, managers believed that technical competence of a surgeon is the only key to a successful surgery. But over the past decade, risks are considered in terms of process-based safety procedures, teamwork and inter departmental communication. Aims: This study aims to determine how the process- biased surgical risk management should be done in terms of project management tool named ABS (Activity Breakdown Structure). Settings and Design: This study was conducted in two stages. First, literature review and meeting with professors was done to determine principles and framework of surgical risk management. Next, responsible teams for surgical patient journey were involved in following meeting to develop the process- biased surgical risk management. Methods and Material: This study is a qualitative research in which focus groups with the inductive approach is used. Sampling was performed to achieve representativeness through intensity sampling biased on experience and seniority. Analysis Method used: context analysis of interviews and consensus themes extracted from FDG meetings discussion was the analysis tool. Results: we developed the patient journey process in 5 main phases, 24 activities and 108 tasks. Then, responsible teams, transposition and allocated places for performing determined. Some activities and tasks themes were repeated in each phases like patient identification and records review because of their importance. Conclusions: Risk management of surgical departments is significant as this facility is the hospital’s largest cost and revenue center. Good communication between surgical team and other clinical teams outside surgery department through process- biased perspective could improve safety of patient under this procedure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=risk%20management" title="risk management">risk management</a>, <a href="https://publications.waset.org/abstracts/search?q=activity%20breakdown%20structure%20%28ABS%29" title=" activity breakdown structure (ABS)"> activity breakdown structure (ABS)</a>, <a href="https://publications.waset.org/abstracts/search?q=surgical%20department" title=" surgical department"> surgical department</a>, <a href="https://publications.waset.org/abstracts/search?q=medical%20sciences" title=" medical sciences"> medical sciences</a> </p> <a href="https://publications.waset.org/abstracts/16973/principles-of-risk-management-in-surgery-department" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16973.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">303</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">13567</span> Fabrication and Analysis of Vertical Double-Diffused Metal Oxide Semiconductor (VDMOS)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Deepika%20Sharma">Deepika Sharma</a>, <a href="https://publications.waset.org/abstracts/search?q=Bal%20Krishan"> Bal Krishan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the structure of N-channel VDMOS was designed and analyzed using Silvaco TCAD tools by varying N+ source doping concentration, P-Body doping concentration, gate oxide thickness and the diffuse time. VDMOS is considered to be ideal power switches due to its high input impedance and fast switching speed. The performance of the device was analyzed from the Ids vs Vgs curve. The electrical characteristics such as threshold voltage, gate oxide thickness and breakdown voltage for the proposed device structures were extarcted. Effect of epitaxial layer on various parameters is also observed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=on-resistance" title="on-resistance">on-resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=threshold%20voltage" title=" threshold voltage"> threshold voltage</a>, <a href="https://publications.waset.org/abstracts/search?q=epitaxial%20layer" title=" epitaxial layer"> epitaxial layer</a>, <a href="https://publications.waset.org/abstracts/search?q=breakdown%20voltage" title=" breakdown voltage"> breakdown voltage</a> </p> <a href="https://publications.waset.org/abstracts/53747/fabrication-and-analysis-of-vertical-double-diffused-metal-oxide-semiconductor-vdmos" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53747.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">327</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">13566</span> Exploring the Strategy to Identify Seed-Specific Acyl-Hydrolases from Arabidopsis thaliana by Activity-Based Protein Profiling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Latha">M. Latha</a>, <a href="https://publications.waset.org/abstracts/search?q=Achintya%20K.%20Dolui"> Achintya K. Dolui</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Vijayaraj"> P. Vijayaraj</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vegetable oils mainly triacylglycerol (TAG) are an essential nutrient in the human diet as well as one of the major global commodity. There is a pressing need to enhance the yield of oil production to meet the world’s growing demand. Oil content is controlled by the balance between synthesis and breakdown in the cells. Several studies have established to increase the oil content by the overexpression of oil biosynthetic enzymes. Interestingly the significant oil accumulation was observed with impaired TAG hydrolysis. Unfortunately, the structural, as well as the biochemical properties of the lipase enzymes, is widely unknown, and so far, no candidate gene was identified in seeds except sugar-dependent1 (SDP1). Evidence has shown that SDP1directly responsible for initiation of oil breakdown in the seeds during germination. The present study is the identification of seed-specific acyl-hydrolases by activity based proteome profiling (ABPP) using Arabidopsis thaliana as a model system. The ABPP reveals that around 8 to 10 proteins having the serine hydrolase domain and are expressed during germination of Arabidopsis seed. The N-term sequencing, as well as LC-MS/MS analysis, was performed for the differentially expressed protein during germination. The coding region of the identified proteins was cloned, and lipases activity was assessed with purified recombinant protein. The enzyme assay was performed against various lipid substrates, and we have observed the acylhydrolase activity towards lysophosphatidylcholine and monoacylglycerol. Further, the functional characteristic of the identified protein will reveal the physiological significance the enzyme in oil accumulation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lipase" title="lipase">lipase</a>, <a href="https://publications.waset.org/abstracts/search?q=lipids" title=" lipids"> lipids</a>, <a href="https://publications.waset.org/abstracts/search?q=vegetable%20oil" title=" vegetable oil"> vegetable oil</a>, <a href="https://publications.waset.org/abstracts/search?q=triacylglycerol" title=" triacylglycerol"> triacylglycerol</a> </p> <a href="https://publications.waset.org/abstracts/77901/exploring-the-strategy-to-identify-seed-specific-acyl-hydrolases-from-arabidopsis-thaliana-by-activity-based-protein-profiling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/77901.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">187</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">13565</span> Simulation of I–V Characteristics of Lateral PIN Diode on Polysilicon Films</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelaziz%20Rabhi">Abdelaziz Rabhi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Amrani"> Mohamed Amrani</a>, <a href="https://publications.waset.org/abstracts/search?q=Abderrazek%20Ziane"> Abderrazek Ziane</a>, <a href="https://publications.waset.org/abstracts/search?q=Nabil%20Belkadi"> Nabil Belkadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelraouf%20Hocini"> Abdelraouf Hocini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, a bedimensional simulation program of the electric characteristics of reverse biased lateral polysilicon PIN diode is presented. In this case we have numerically solved the system of partial differential equations formed by Poisson's equation and both continuity equations that take into account the effect of impact ionization. Therefore we will obtain the current-voltage characteristics (I-V) of the reverse-biased structure which may include the effect of breakdown.The geometrical model assumes that the polysilicon layer is composed by a succession of defined mean grain size crystallites, separated by lateral grain boundaries which are parallel to the metallurgic junction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=breakdown" title="breakdown">breakdown</a>, <a href="https://publications.waset.org/abstracts/search?q=polycrystalline%20silicon" title=" polycrystalline silicon"> polycrystalline silicon</a>, <a href="https://publications.waset.org/abstracts/search?q=PIN" title=" PIN"> PIN</a>, <a href="https://publications.waset.org/abstracts/search?q=grain" title=" grain"> grain</a>, <a href="https://publications.waset.org/abstracts/search?q=impact%20ionization" title=" impact ionization"> impact ionization</a> </p> <a href="https://publications.waset.org/abstracts/1337/simulation-of-i-v-characteristics-of-lateral-pin-diode-on-polysilicon-films" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1337.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">381</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">13564</span> Quantifying Freeway Capacity Reductions by Rainfall Intensities Based on Stochastic Nature of Flow Breakdown</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hoyoung%20Lee">Hoyoung Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Dong-Kyu%20Kim"> Dong-Kyu Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Seung-Young%20Kho"> Seung-Young Kho</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Eddie%20Wilson"> R. Eddie Wilson</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p class="Abstract"><span lang="EN-US">This study quantifies a decrement in freeway capacity during rainfall. Traffic and rainfall data were gathered from Highway Agencies and Wunderground weather service. Three inter-urban freeway sections and its nearest weather stations were selected as experimental sites. Capacity analysis found reductions of maximum and mean pre-breakdown flow rates due to rainfall. The Kruskal-Wallis test also provided some evidence to suggest that the variance in the pre-breakdown flow rate is statistically insignificant. Potential application of this study lies in the operation of real time traffic management schemes such as Variable Speed Limits (VSL), Hard Shoulder Running (HSR), and Ramp Metering System (RMS), where speed or flow limits could be set based on a number of factors, including rainfall events and their intensities.<o:p> </o:p></span> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=capacity%20randomness" title="capacity randomness">capacity randomness</a>, <a href="https://publications.waset.org/abstracts/search?q=flow%20breakdown" title=" flow breakdown"> flow breakdown</a>, <a href="https://publications.waset.org/abstracts/search?q=freeway%20capacity" title=" freeway capacity"> freeway capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=rainfall" title=" rainfall"> rainfall</a> </p> <a href="https://publications.waset.org/abstracts/69639/quantifying-freeway-capacity-reductions-by-rainfall-intensities-based-on-stochastic-nature-of-flow-breakdown" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/69639.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">382</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">13563</span> One Dimensional Magneto-Plasmonic Structure Based On Metallic Nano-Grating</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20M.%20Hamidi">S. M. Hamidi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Zamani"> M. Zamani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Magneto-plasmonic (MP) structures have turned into essential tools for the amplification of magneto-optical (MO) responses via the combination of MO activity and surface Plasmon resonance (SPR). Both the plasmonic and the MO properties of the resulting MP structure become interrelated because the SPR of the metallic medium. This interconnection can be modified the wave vector of surface plasmon polariton (SPP) in MP multilayer [1] or enhanced the MO activity [2- 3] and also modified the sensor responses [4]. There are several types of MP structures which are studied to enhance MO response in miniaturized configuration. In this paper, we propose a new MP structure based on the nano-metal grating and we investigate the MO and optical properties of this new structure. Our new MP structure fabricate by DC magnetron sputtering method and our home made MO experimental setup use for characterization of the structure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Magneto-plasmonic%20structures" title="Magneto-plasmonic structures">Magneto-plasmonic structures</a>, <a href="https://publications.waset.org/abstracts/search?q=magneto-optical%20effect" title=" magneto-optical effect"> magneto-optical effect</a>, <a href="https://publications.waset.org/abstracts/search?q=nano-garting" title=" nano-garting"> nano-garting</a> </p> <a href="https://publications.waset.org/abstracts/19371/one-dimensional-magneto-plasmonic-structure-based-on-metallic-nano-grating" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19371.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">563</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">13562</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">13561</span> Quantitative Structure-Activity Relationship Study of Some Quinoline Derivatives as Antimalarial Agents</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Ouassaf">M. Ouassaf</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Belaid"> S. Belaid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A series of quinoline derivatives with antimalarial activity were subjected to two-dimensional quantitative structure-activity relationship (2D-QSAR) studies. Three models were implemented using multiple regression linear MLR, a regression partial least squares (PLS), nonlinear regression (MNLR), to see which descriptors are closely related to the activity biologic. We relied on a principal component analysis (PCA). Based on our results, a comparison of the quality of, MLR, PLS, and MNLR models shows that the MNLR (R = 0.914 and R² = 0.835, RCV= 0.853) models have substantially better predictive capability because the MNLR approach gives better results than MLR (R = 0.835 and R² = 0,752, RCV=0.601)), PLS (R = 0.742 and R² = 0.552, RCV=0.550) The model of MNLR gave statistically significant results and showed good stability to data variation in leave-one-out cross-validation. The obtained results suggested that our proposed model MNLR may be useful to predict the biological activity of derivatives of quinoline. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antimalarial" title="antimalarial">antimalarial</a>, <a href="https://publications.waset.org/abstracts/search?q=quinoline" title=" quinoline"> quinoline</a>, <a href="https://publications.waset.org/abstracts/search?q=QSAR" title=" QSAR"> QSAR</a>, <a href="https://publications.waset.org/abstracts/search?q=PCA" title=" PCA"> PCA</a>, <a href="https://publications.waset.org/abstracts/search?q=MLR" title=" MLR "> MLR </a>, <a href="https://publications.waset.org/abstracts/search?q=MNLR" title="MNLR">MNLR</a>, <a href="https://publications.waset.org/abstracts/search?q=MLR" title=" MLR"> MLR</a> </p> <a href="https://publications.waset.org/abstracts/100879/quantitative-structure-activity-relationship-study-of-some-quinoline-derivatives-as-antimalarial-agents" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/100879.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">156</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13560</span> Analyzing the Relationship between the Spatial Characteristics of Cultural Structure, Activities, and the Tourism Demand</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Deniz%20Karag%C3%B6z">Deniz Karagöz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study is attempt to comprehend the relationship between the spatial characteristics of cultural structure, activities and the tourism demand in Turkey. The analysis divided into four parts. The first part consisted of a cultural structure and cultural activity (CSCA) index provided by principal component analysis. The analysis determined four distinct dimensions, namely, cultural activity/structure, accessing culture, consumption, and cultural management. The exploratory spatial data analysis employed to determine the spatial models of cultural structure and cultural activities in 81 provinces in Turkey. Global Moran I indices is used to ascertain the cultural activities and the structural clusters. Finally, the relationship between the cultural activities/cultural structure and tourism demand was analyzed. The raw/original data of the study official databases. The data on the cultural structure and activities gathered from the Turkish Statistical Institute and the data related to the tourism demand was provided by the Republic of Turkey Ministry of Culture and Tourism. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cultural%20activities" title="cultural activities">cultural activities</a>, <a href="https://publications.waset.org/abstracts/search?q=cultural%20structure" title=" cultural structure"> cultural structure</a>, <a href="https://publications.waset.org/abstracts/search?q=spatial%20characteristics" title=" spatial characteristics"> spatial characteristics</a>, <a href="https://publications.waset.org/abstracts/search?q=tourism%20demand" title=" tourism demand"> tourism demand</a>, <a href="https://publications.waset.org/abstracts/search?q=Turkey" title=" Turkey"> Turkey</a> </p> <a href="https://publications.waset.org/abstracts/48404/analyzing-the-relationship-between-the-spatial-characteristics-of-cultural-structure-activities-and-the-tourism-demand" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48404.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">561</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">13559</span> Effect of Varying Zener-Hollomon Parameter (Temperature and Flow Stress) and Stress Relaxation on Creep Response of Hot Deformed AA3104 Can Body Stock</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Oyindamola%20Kayode">Oyindamola Kayode</a>, <a href="https://publications.waset.org/abstracts/search?q=Sarah%20George"> Sarah George</a>, <a href="https://publications.waset.org/abstracts/search?q=Roberto%20Borrageiro"> Roberto Borrageiro</a>, <a href="https://publications.waset.org/abstracts/search?q=Mike%20Shirran"> Mike Shirran</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A phenomenon identified by our industrial partner has experienced sag on AA3104 can body stock (CBS) transfer bar during transportation of the slab from the breakdown mill to the finishing mill. Excessive sag results in bottom scuffing of the slab onto the roller table, resulting in surface defects on the final product. It has been found that increasing the strain rate on the breakdown mill final pass results in a slab resistant to sag. The creep response for materials hot deformed at different Zener–Holloman parameter values needs to be evaluated experimentally to gain better understanding of the operating mechanism. This study investigates this identified phenomenon through laboratory simulation of the breakdown mill conditions for various strain rates by utilizing the Gleeble at UCT Centre for Materials Engineering. The experiment will determine the creep response for a range of conditions as well as quantifying the associated material microstructure (sub-grain size, grain structure etc). The experimental matrices were determined based on experimental conditions approximate to industrial hot breakdown rolling and carried out on the Gleeble 3800 at the Centre for Materials Engineering, University of Cape Town. Plane strain compression samples were used for this series of tests at an applied load that allow for better contact and exaggerated creep displacement. A tantalum barrier layer was used for increased conductivity and decreased risk of anvil welding. One set of tests with no in-situ hold time was performed, where the samples were quenched after deformation. The samples were retained for microstructure analysis of the micrographs from the light microscopy (LM), quantitative data and images from scanning electron microscopy (SEM) and energy dispersive X-ray (EDX), sub-grain size and grain structure from electron back scattered diffraction (EBSD). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aluminium%20alloy" title="aluminium alloy">aluminium alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=can-body%20stock" title=" can-body stock"> can-body stock</a>, <a href="https://publications.waset.org/abstracts/search?q=hot%20rolling" title=" hot rolling"> hot rolling</a>, <a href="https://publications.waset.org/abstracts/search?q=creep%20response" title=" creep response"> creep response</a>, <a href="https://publications.waset.org/abstracts/search?q=Zener-Hollomon%20parameter" title=" Zener-Hollomon parameter"> Zener-Hollomon parameter</a> </p> <a href="https://publications.waset.org/abstracts/152728/effect-of-varying-zener-hollomon-parameter-temperature-and-flow-stress-and-stress-relaxation-on-creep-response-of-hot-deformed-aa3104-can-body-stock" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152728.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">86</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13558</span> Qualitative and Quantitative Analysis of Uranium in Ceramic Tiles Using Laser-Induced Breakdown Spectroscopy and Gamma-Ray Spectroscopy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Reem%20M.%20Altuwirqi">Reem M. Altuwirqi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohja%20S.%20Summan"> Mohja S. Summan</a>, <a href="https://publications.waset.org/abstracts/search?q=Entesar%20A.%20Ganash"> Entesar A. Ganash</a>, <a href="https://publications.waset.org/abstracts/search?q=Safia%20H.%20Hamidalddin"> Safia H. Hamidalddin</a>, <a href="https://publications.waset.org/abstracts/search?q=Tamer%20E.%20Youssef"> Tamer E. Youssef</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20A.%20Gondal"> Mohammed A. Gondal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Laser-Induced Breakdown Spectroscopy (LIBS) technique using 1064 nm Nd: YAG laser was optimized and applied for investigating the existence of radioactive elements (uranium) in twenty-six different ceramic tiles. These tiles were collected from the local Saudi market. Qualitative and quantitative analysis for trace radioactive elements like uranium in these samples was achieved using LIBS. The plasma parameters such as temperature and electron density were calculated to confirm that the plasma generated by the tile samples under laser irradiation can be related to analyte concentrations. In order to perform a quantitative analysis, calibration curves were constructed for two uranium lines (U II (424.166 nm) and U II (424.437 nm)). The Uranium activity concentration in Bq/kg for each sample was measured. Cross-validation of LIBS results with a conventional technique such as Gamma-Ray spectroscopy was also carried out for five ceramic samples. The results show that the LIBS method is an effective way of determining radioactive elements such as uranium in ceramic tiles. Moreover, the uranium concentrations of the investigated samples were below the permissible safe limit for building materials in the majority of samples. Such LIBS system could be applied to determine the presence of natural radioactive elements in ceramic tiles and their radioactivity level rapidly to ensure that they are under the safe allowed limit. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser-induced%20breakdown%20spectroscopy" title="laser-induced breakdown spectroscopy">laser-induced breakdown spectroscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=gamma-ray%20spectroscopy" title=" gamma-ray spectroscopy"> gamma-ray spectroscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20radioactivity" title=" natural radioactivity"> natural radioactivity</a>, <a href="https://publications.waset.org/abstracts/search?q=uranium" title=" uranium"> uranium</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20tiles" title=" ceramic tiles"> ceramic tiles</a> </p> <a href="https://publications.waset.org/abstracts/143458/qualitative-and-quantitative-analysis-of-uranium-in-ceramic-tiles-using-laser-induced-breakdown-spectroscopy-and-gamma-ray-spectroscopy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143458.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">172</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13557</span> In₀.₁₈Al₀.₈₂N/AlN/GaN/Si Metal-Oxide-Semiconductor Heterostructure Field-Effect Transistors with Backside Metal-Trench Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C.%20S%20Lee">C. S Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=W.%20C.%20Hsu"> W. C. Hsu</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Y.%20Liu"> H. Y. Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20J.%20Lin"> C. J. Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20C.%20Yao"> S. C. Yao</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20T.%20Shen"> Y. T. Shen</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20C.%20Lin"> Y. C. Lin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In₀.₁₈Al₀.₈₂N/AlN/GaN metal-oxide-semiconductor heterostructure field-effect transistors (MOS-HFETs) having Al₂O₃ gate-dielectric and backside metal-trench structure are investigated. The Al₂O₃ gate oxide was formed by using a cost-effective non-vacuum ultrasonic spray pyrolysis deposition (USPD) method. In order to enhance the heat dissipation efficiency, metal trenches were etched 3-µm deep and evaporated with a 150-nm thick Ni film on the backside of the Si substrate. The present In₀.₁₈Al₀.₈₂N/AlN/GaN MOS-HFET (Schottky-gate HFET) has demonstrated improved maximum drain-source current density (IDS, max) of 1.08 (0.86) A/mm at VDS = 8 V, gate-voltage swing (GVS) of 4 (2) V, on/off-current ratio (Ion/Ioff) of 8.9 × 10⁸ (7.4 × 10⁴), subthreshold swing (SS) of 140 (244) mV/dec, two-terminal off-state gate-drain breakdown voltage (BVGD) of -191.1 (-173.8) V, turn-on voltage (Von) of 4.2 (1.2) V, and three-terminal on-state drain-source breakdown voltage (BVDS) of 155.9 (98.5) V. Enhanced power performances, including saturated output power (Pout) of 27.9 (21.5) dBm, power gain (Gₐ) of 20.3 (15.5) dB, and power-added efficiency (PAE) of 44.3% (34.8%), are obtained. Superior breakdown and RF power performances are achieved. The present In₀.₁₈Al₀.₈₂N/AlN/GaN MOS-HFET design with backside metal-trench is advantageous for high-power circuit applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=backside%20metal-trench" title="backside metal-trench">backside metal-trench</a>, <a href="https://publications.waset.org/abstracts/search?q=InAlN%2FAlN%2FGaN" title=" InAlN/AlN/GaN"> InAlN/AlN/GaN</a>, <a href="https://publications.waset.org/abstracts/search?q=MOS-HFET" title=" MOS-HFET"> MOS-HFET</a>, <a href="https://publications.waset.org/abstracts/search?q=non-vacuum%20ultrasonic%20spray%20pyrolysis%20deposition" title=" non-vacuum ultrasonic spray pyrolysis deposition"> non-vacuum ultrasonic spray pyrolysis deposition</a> </p> <a href="https://publications.waset.org/abstracts/85398/in018al082nalngansi-metal-oxide-semiconductor-heterostructure-field-effect-transistors-with-backside-metal-trench-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/85398.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">254</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">13556</span> Quantitative Structure Activity Relationship Model for Predicting the Aromatase Inhibition Activity of 1,2,3-Triazole Derivatives</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Ouassaf">M. Ouassaf</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Belaidi"> S. Belaidi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aromatase is an estrogen biosynthetic enzyme belonging to the cytochrome P450 family, which catalyzes the limiting step in the conversion of androgens to estrogens. As it is relevant for the promotion of tumor cell growth. A set of thirty 1,2,3-triazole derivatives was used in the quantitative structure activity relationship (QSAR) study using regression multiple linear (MLR), We divided the data into two training and testing groups. The results showed a good predictive ability of the MLR model, the models were statistically robust internally (R² = 0.982) and the predictability of the model was tested by several parameters. including external criteria (R²pred = 0.851, CCC = 0.946). The knowledge gained in this study should provide relevant information that contributes to the origins of aromatase inhibitory activity and, therefore, facilitates our ongoing quest for aromatase inhibitors with robust properties. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aromatase%20inhibitors" title="aromatase inhibitors">aromatase inhibitors</a>, <a href="https://publications.waset.org/abstracts/search?q=QSAR" title=" QSAR"> QSAR</a>, <a href="https://publications.waset.org/abstracts/search?q=MLR" title=" MLR"> MLR</a>, <a href="https://publications.waset.org/abstracts/search?q=1" title=" 1"> 1</a>, <a href="https://publications.waset.org/abstracts/search?q=2" title="2">2</a>, <a href="https://publications.waset.org/abstracts/search?q=3-triazole" title="3-triazole">3-triazole</a> </p> <a href="https://publications.waset.org/abstracts/100877/quantitative-structure-activity-relationship-model-for-predicting-the-aromatase-inhibition-activity-of-123-triazole-derivatives" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/100877.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">115</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">13555</span> Modeling the Time-Dependent Rheological Behavior of Clays Used in Fabrication of Ceramic</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Larbi%20Hammadi">Larbi Hammadi</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Boudjenane"> N. Boudjenane</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Benhallou"> N. Benhallou</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Houjedje"> R. Houjedje</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Reffis"> R. Reffis</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Belhadri"> M. Belhadri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many of clays exhibited the thixotropic behavior in which, the apparent viscosity of material decreases with time of shearing at constant shear rate. The structural kinetic model (SKM) was used to characterize the thixotropic behavior of two different kinds of clays used in fabrication of ceramic. Clays selected for analysis represent the fluid and semisolid clays materials. The SKM postulates that the change in the rheological behavior is associated with shear-induced breakdown of the internal structure of the clays. This model for the structure decay with time at constant shear rate assumes nth order kinetics for the decay of the material structure with a rate constant. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ceramic" title="ceramic">ceramic</a>, <a href="https://publications.waset.org/abstracts/search?q=clays" title=" clays"> clays</a>, <a href="https://publications.waset.org/abstracts/search?q=structural%20kinetic%20model" title=" structural kinetic model"> structural kinetic model</a>, <a href="https://publications.waset.org/abstracts/search?q=thixotropy" title=" thixotropy"> thixotropy</a>, <a href="https://publications.waset.org/abstracts/search?q=viscosity" title=" viscosity"> viscosity</a> </p> <a href="https://publications.waset.org/abstracts/31716/modeling-the-time-dependent-rheological-behavior-of-clays-used-in-fabrication-of-ceramic" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31716.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">410</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">13554</span> Air Breakdown Voltage Prediction in Post-arcing Conditions for Compact Circuit Breakers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jing%20Nan">Jing Nan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The air breakdown voltage in compact circuit breakers is a critical factor in the design and reliability of electrical distribution systems. This voltage determines the threshold at which the air insulation between conductors will fail or 'break down,' leading to an arc. This phenomenon is highly sensitive to the conditions within the breaker, such as the temperature and the distance between electrodes. Typically, air breakdown voltage models have been reliable for predicting failure under standard operational temperatures. However, in conditions post-arcing, where temperatures can soar above 2000K, these models face challenges due to the complex physics of ionization and electron behaviour at such high-energy states. Building upon the foundational understanding that the breakdown mechanism is initiated by free electrons and propelled by electric fields, which lead to ionization and, potentially, to avalanche or streamer formation, we acknowledge the complexity introduced by high-temperature environments. Recognizing the limitations of existing experimental data, a notable research gap exists in the accurate prediction of breakdown voltage at elevated temperatures, typically observed post-arcing, where temperatures exceed 2000K.To bridge this knowledge gap, we present a method that integrates gap distance and high-temperature effects into air breakdown voltage assessment. The proposed model is grounded in the physics of ionization, accounting for the dynamic behaviour of free electrons which, under intense electric fields at elevated temperatures, lead to thermal ionization and potentially reach the threshold for streamer formation as Meek's criterion. Employing the Saha equation, our model calculates equilibrium electron densities, adapting to the atmospheric pressure and the hot temperature regions indicative of post-arc temperature conditions. Our model is rigorously validated against established experimental data, demonstrating substantial improvements in predicting air breakdown voltage in the high-temperature regime. This work significantly improves the predictive power for air breakdown voltage under conditions that closely mimic operational stressors in compact circuit breakers. Looking ahead, the proposed methods are poised for further exploration in alternative insulating media, like SF6, enhancing the model's utility for a broader range of insulation technologies and contributing to the future of high-temperature electrical insulation research. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=air%20breakdown%20voltage" title="air breakdown voltage">air breakdown voltage</a>, <a href="https://publications.waset.org/abstracts/search?q=high-temperature%20insulation" title=" high-temperature insulation"> high-temperature insulation</a>, <a href="https://publications.waset.org/abstracts/search?q=compact%20circuit%20breakers" title=" compact circuit breakers"> compact circuit breakers</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20discharge" title=" electrical discharge"> electrical discharge</a>, <a href="https://publications.waset.org/abstracts/search?q=saha%20equation" title=" saha equation"> saha equation</a> </p> <a href="https://publications.waset.org/abstracts/178874/air-breakdown-voltage-prediction-in-post-arcing-conditions-for-compact-circuit-breakers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/178874.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">84</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13553</span> Isolation, Structure Elucidation, and Biological Evaluation of Acetylated Flavonoid Glycosides from Centaurium spicatum</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelaaty%20A.%20Shahat">Abdelaaty A. Shahat</a>, <a href="https://publications.waset.org/abstracts/search?q=Mansour%20S.%20Alsaid"> Mansour S. Alsaid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Four Acetylated ﬂavonol glycosides were isolated from Centaurium spicatum (L.) Fritsch (Gentianaceae). Structure elucidation, especially the localization of the acetyl groups, and complete 1H and 13C NMR assignments of these biologically active compounds were carried out using one- and two-dimensional NMR methods, including CNMR, DEPT-135 and DEPT-90 and gradient-assisted experiments such as DQF-COSY, TOCSY, HSQC and HMBC experiments. The antioxidant activities of the new acetylated flavonoid glycosides using DPPH• assay were determined. The compounds tested showed a good DPPH• activity compared with control, but their activity was lower than that of their corresponding aglycone, quercetin. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Centaurium%20spicatum" title="Centaurium spicatum">Centaurium spicatum</a>, <a href="https://publications.waset.org/abstracts/search?q=flavonoids" title=" flavonoids"> flavonoids</a>, <a href="https://publications.waset.org/abstracts/search?q=biological%20activity" title=" biological activity"> biological activity</a>, <a href="https://publications.waset.org/abstracts/search?q=isolation" title=" isolation"> isolation</a>, <a href="https://publications.waset.org/abstracts/search?q=glycosides" title=" glycosides"> glycosides</a> </p> <a href="https://publications.waset.org/abstracts/20214/isolation-structure-elucidation-and-biological-evaluation-of-acetylated-flavonoid-glycosides-from-centaurium-spicatum" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20214.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">407</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">13552</span> Catalytic Cracking of Hydrocarbon over Zeolite Based Catalysts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Debdut%20Roy">Debdut Roy</a>, <a href="https://publications.waset.org/abstracts/search?q=Vidyasagar%20Guggilla"> Vidyasagar Guggilla</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this research, we highlight our exploratory work on modified zeolite based catalysts for catalytic cracking of hydrocarbons for production of light olefin i.e. ethylene and propylene. The work is focused on understanding the catalyst structure and activity correlation. Catalysts are characterized by surface area and pore size distribution analysis, inductively coupled plasma optical emission spectrometry (ICP-OES), Temperature Programmed Desorption (TPD) of ammonia, pyridine Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Thermo-gravimetric Analysis (TGA) and correlated with the catalytic activity. It is observed that the yield of lighter olefins increases with increase of Bronsted acid strength. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=catalytic%20cracking" title="catalytic cracking">catalytic cracking</a>, <a href="https://publications.waset.org/abstracts/search?q=zeolite" title=" zeolite"> zeolite</a>, <a href="https://publications.waset.org/abstracts/search?q=propylene" title=" propylene"> propylene</a>, <a href="https://publications.waset.org/abstracts/search?q=structure-activity%20correlation" title=" structure-activity correlation"> structure-activity correlation</a> </p> <a href="https://publications.waset.org/abstracts/72865/catalytic-cracking-of-hydrocarbon-over-zeolite-based-catalysts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/72865.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">218</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">13551</span> Quantitative Structure-Activity Relationship Modeling of Detoxication Properties of Some 1,2-Dithiole-3-Thione Derivatives</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nadjib%20Melkemi">Nadjib Melkemi</a>, <a href="https://publications.waset.org/abstracts/search?q=Salah%20Belaidi"> Salah Belaidi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Quantitative Structure-Activity Relationship (QSAR) studies have been performed on nineteen molecules of 1,2-dithiole-3-thione analogues. The compounds used are the potent inducers of enzymes involved in the maintenance of reduced glutathione pools as well as phase-2 enzymes important to electrophile detoxication. A multiple linear regression (MLR) procedure was used to design the relationships between molecular descriptor and detoxication properties of the 1,2-dithiole-3-thione derivatives. The predictivity of the model was estimated by cross-validation with the leave-one-out method. Our results suggest a QSAR model based of the following descriptors: qS2, qC3, qC5, qS6, DM, Pol, log P, MV, SAG, HE and EHOMO for the specific activity of quinone reductase; qS1, qS2, qC3, qC4, qC5, qS6, DM, Pol, logP, MV, SAG, HE and EHOMO for the production of growth hormone. To confirm the predictive power of the models, an external set of molecules was used. High correlation between experimental and predicted activity values was observed, indicating the validation and the good quality of the derived QSAR models. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=QSAR" title="QSAR">QSAR</a>, <a href="https://publications.waset.org/abstracts/search?q=quinone%20reductase%20activity" title=" quinone reductase activity"> quinone reductase activity</a>, <a href="https://publications.waset.org/abstracts/search?q=production%20of%20growth%20hormone" title=" production of growth hormone"> production of growth hormone</a>, <a href="https://publications.waset.org/abstracts/search?q=MLR" title=" MLR"> MLR</a> </p> <a href="https://publications.waset.org/abstracts/7137/quantitative-structure-activity-relationship-modeling-of-detoxication-properties-of-some-12-dithiole-3-thione-derivatives" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7137.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">350</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">13550</span> ORR Activity and Stability of Pt-Based Electrocatalysts in PEM Fuel Cell</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Limpattayanate">S. Limpattayanate</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Hunsom"> M. Hunsom</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A comparison of activity and stability of the as-formed Pt/C, Pt-Co, and Pt-Pd/C electrocatalysts, prepared by a combined approach of impregnation and seeding, was performed. According to the activity test in a single proton exchange membrane (PEM) fuel cell, the oxygen reduction reaction (ORR) activity of the Pt-M/C electro catalyst was slightly lower than that of Pt/C. The j0.9 V and E10 mA/cm2 of the as-prepared electrocatalysts increased in the order of Pt/C>Pt-Co/C>Pt-Pd/C. However, in the medium-to-high current density region, Pt-Pd/C exhibited the best performance. With regard to their stability in a 0.5 M H2SO4 electrolyte solution, the electro chemical surface area decreased as the number of rounds of repetitive potential cycling increased due to the dissolution of the metals within the catalyst structure. For long-term measurement, Pt-Pd/C was the most stable than the other three electrocatalysts. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ORR%20activity" title="ORR activity">ORR activity</a>, <a href="https://publications.waset.org/abstracts/search?q=stability" title=" stability"> stability</a>, <a href="https://publications.waset.org/abstracts/search?q=Pt-based%20electrocatalysts" title=" Pt-based electrocatalysts"> Pt-based electrocatalysts</a>, <a href="https://publications.waset.org/abstracts/search?q=PEM%20fuel%20cell" title=" PEM fuel cell"> PEM fuel cell</a> </p> <a href="https://publications.waset.org/abstracts/25226/orr-activity-and-stability-of-pt-based-electrocatalysts-in-pem-fuel-cell" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25226.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">446</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">13549</span> In vitro α-Amylase and α-Glucosidase Inhibitory Activities of Bitter Melon (Momordica charantia) with Different Stage of Maturity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20S.%20Percin">P. S. Percin</a>, <a href="https://publications.waset.org/abstracts/search?q=O.%20Inanli"> O. Inanli</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Karakaya"> S. Karakaya</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Bitter melon (Momordica charantia) is a medicinal vegetable, which is used traditionally to remedy diabetes. Bitter melon contains several classes of primary and secondary metabolites. In traditional Turkish medicine bitter melon is used for wound healing and treatment of peptic ulcers. Nowadays, bitter melon is used for the treatment of diabetes and ulcerative colitis in many countries. The main constituents of bitter melon, which are responsible for the anti-diabetic effects, are triterpene, protein, steroid, alkaloid and phenolic compounds. In this study total phenolics, total carotenoids and β-carotene contents of mature and immature bitter melons were determined. In addition, in vitro α-amylase and α-glucosidase activities of mature and immature bitter melons were studied. Total phenolic contents of immature and mature bitter melon were 74 and 123 mg CE/g bitter melon respectively. Although total phenolics of mature bitter melon was higher than that of immature bitter melon, this difference was not found statistically significant (p > 0.05). Carotenoids, a diverse group of more than 600 naturally occurring red, orange and yellow pigments, play important roles in many physiological processes both in plants and humans. The total carotenoid content of mature bitter melon was 4.36 fold higher than the total carotenoid content of immature bitter melon. The compounds that have hypoglycaemic effect of bitter melon are steroidal saponins known as charantin, insulin-like peptides and alkaloids. α-Amylase is one of the main enzymes in human that is responsible for the breakdown of starch to more simple sugars. Therefore, the inhibitors of this enzyme can delay the carbohydrate digestion and reduce the rate of glucose absorption. The immature bitter melon extract showed α-amylase and α-glucosidase inhibitory activities in vitro. α-Amylase inhibitory activity was higher than that of α-glucosidase inhibitory activity when IC50 values were compared. In conclusion, the present results provide evidence that aqueous extract of bitter melon may have an inhibitory effect on carbohydrate breakdown enzymes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bitter%20melon" title="bitter melon">bitter melon</a>, <a href="https://publications.waset.org/abstracts/search?q=in%20vitro%20antidiabetic%20activity" title=" in vitro antidiabetic activity"> in vitro antidiabetic activity</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20carotenoids" title=" total carotenoids"> total carotenoids</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20phenols" title=" total phenols"> total phenols</a> </p> <a href="https://publications.waset.org/abstracts/81770/in-vitro-a-amylase-and-a-glucosidase-inhibitory-activities-of-bitter-melon-momordica-charantia-with-different-stage-of-maturity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/81770.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">13548</span> The Constraint of Machine Breakdown after a Match up Scheduling of Paper Manufacturing Industry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=John%20M.%20Ikome">John M. Ikome</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the process of manufacturing, a machine breakdown usually forces a modified flow shop out of the prescribed state, this strategy reschedules part of the initial schedule to match up with the pre-schedule at some point with the objective to create a schedule that is reliable with the other production planning decisions like material flow, production and suppliers by utilizing a critical decision-making concept. We propose a rescheduling strategy and a match-up point that will have a determination procedure through an advanced feedback control mechanism to increase both the schedule quality and stability. These approaches are compared with alternative re-scheduling methods under different experimental settings. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=scheduling" title="scheduling">scheduling</a>, <a href="https://publications.waset.org/abstracts/search?q=heuristics" title=" heuristics"> heuristics</a>, <a href="https://publications.waset.org/abstracts/search?q=branch" title=" branch"> branch</a>, <a href="https://publications.waset.org/abstracts/search?q=integrated" title=" integrated"> integrated</a> </p> <a href="https://publications.waset.org/abstracts/50639/the-constraint-of-machine-breakdown-after-a-match-up-scheduling-of-paper-manufacturing-industry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50639.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">408</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">13547</span> An Investigation of Vegetable Oils as Potential Insulating Liquid</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Celal%20Kocatepe">Celal Kocatepe</a>, <a href="https://publications.waset.org/abstracts/search?q=Eyup%20Taslak"> Eyup Taslak</a>, <a href="https://publications.waset.org/abstracts/search?q=Celal%20Fadil%20Kumru"> Celal Fadil Kumru</a>, <a href="https://publications.waset.org/abstracts/search?q=Oktay%20Arikan"> Oktay Arikan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> While choosing insulating oil, characteristic features such as thermal cooling, endurance, efficiency and being environment-friendly should be considered. Mineral oils are referred as petroleum-based oil. In this study, vegetable oils investigated as an alternative insulating liquid to mineral oil. Dissipation factor, breakdown voltage, relative dielectric constant and resistivity changes with the frequency and voltage of mineral, rapeseed and nut oils were measured. Experimental studies were performed according to ASTM D924 and IEC 60156 standards. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=breakdown%20voltage" title="breakdown voltage">breakdown voltage</a>, <a href="https://publications.waset.org/abstracts/search?q=dielectric%20dissipation%20factor" title=" dielectric dissipation factor"> dielectric dissipation factor</a>, <a href="https://publications.waset.org/abstracts/search?q=mineral%20oil" title=" mineral oil"> mineral oil</a>, <a href="https://publications.waset.org/abstracts/search?q=vegetable%20oils" title=" vegetable oils"> vegetable oils</a> </p> <a href="https://publications.waset.org/abstracts/35815/an-investigation-of-vegetable-oils-as-potential-insulating-liquid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35815.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">694</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">13546</span> The Design of a Mixed Matrix Model for Activity Levels Extraction and Sub Processes Classification of a Work Project (Case: Great Tehran Electrical Distribution Company)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elham%20Allahmoradi">Elham Allahmoradi</a>, <a href="https://publications.waset.org/abstracts/search?q=Bahman%20Allahmoradi"> Bahman Allahmoradi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Bonyadi%20Naeini"> Ali Bonyadi Naeini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Complex systems have many aspects. A variety of methods have been developed to analyze these systems. The most efficient of these methods should not only be simple, but also provide useful and comprehensive information about many aspects of the system. Matrix methods are considered the most commonly methods used to analyze and design systems. Each matrix method can examine a particular aspect of the system. If these methods are combined, managers can access to more comprehensive and broader information about the system. This study was conducted in four steps. In the first step, a process model of a real project has been extracted through IDEF3. In the second step, activity levels have been attained by writing a process model in the form of a design structure matrix (DSM) and sorting it through triangulation algorithm (TA). In the third step, sub-processes have been obtained by writing the process model in the form of an interface structure matrix (ISM) and clustering it through cluster identification algorithm (CIA). In the fourth step, a mixed model has been developed to provide a unified picture of the project structure through the simultaneous presentation of activities and sub-processes. Finally, the paper is completed with a conclusion. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=integrated%20definition%20for%20process%20description%20capture%20%28IDEF3%29%20method" title="integrated definition for process description capture (IDEF3) method">integrated definition for process description capture (IDEF3) method</a>, <a href="https://publications.waset.org/abstracts/search?q=design%20structure%20matrix%20%28DSM%29" title=" design structure matrix (DSM)"> design structure matrix (DSM)</a>, <a href="https://publications.waset.org/abstracts/search?q=interface%20structure%20matrix%20%28ism%29" title=" interface structure matrix (ism)"> interface structure matrix (ism)</a>, <a href="https://publications.waset.org/abstracts/search?q=mixed%20matrix%20model" title=" mixed matrix model"> mixed matrix model</a>, <a href="https://publications.waset.org/abstracts/search?q=activity%20level" title=" activity level"> activity level</a>, <a href="https://publications.waset.org/abstracts/search?q=sub-process" title=" sub-process"> sub-process</a> </p> <a href="https://publications.waset.org/abstracts/35902/the-design-of-a-mixed-matrix-model-for-activity-levels-extraction-and-sub-processes-classification-of-a-work-project-case-great-tehran-electrical-distribution-company" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35902.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">494</span> </span> </div> </div> <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=activity%20breakdown%20structure%20%28ABS%29&page=2">2</a></li> <li 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