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salman,파잘 아카람,김준찬,송태권,김명호,이순일,Rizwan Ahmed Malik,Ali Hussain,김원정,성연수 한국물리학회 2019 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.75 No.10
In the present work, lead-free piezoelectric ceramics 0.65Bi1.05Fe1−xTixO3-0.35BaTi1−yNbyO3, where x = y = 0, 0.01, 0.015, 0.02, and 0.025, abbreviated as BFT-BTNb, were successfully synthesized by a solid-state reaction method and an air quenching method. The effects of B-Site donor modifications (Nb5+ and Ti4+) on the crystal structure, the morphology and the electrical properties of the 0.65BF-0.35BT ceramics were studied. X-ray diffraction patterns showed the formation of a pure perovskite structure, without any secondary phases. Scanning electron microscope (SEM) micrographs revealed that the average grain size of the BF-BT ceramics decreased with the addition of B-Site donors. Improvements in the ferroelectric properties (P-E loops) and the electric fieldinduced strain properties (S-E loops) were obtained at the optimum composition of the BFT-BTN ceramics. In addition, the dynamic piezoelectric coefficient (d ∗ 33) was enhanced from 265 pm/V for (BFT-BTNb-0) to 360 pm/V for (BFT-BTNb-1) with high working temperature, Tm = 320 ◦ C.
Alzahrani Salman M.,Alwafi Anas M.,Alshehri Salman M. 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.3
The Saudi National Atomic Energy project aims to adopt peaceful nuclear technologies and be part of the country's energy mix. As emerging nuclear energy, it is essential to understand public concerns and acceptability of nuclear energy, as well as the factors influencing acceptance to develop nuclear energy policy and implement nuclear energy programs. The purpose of this study is to analyze the public attitudes and acceptance of nuclear energy among Saudi Arabian citizens by utilizing protection motivation theory and theory of planned behavior. A total of 1,404 participants answered a questionnaire which was distribute by convenience sampling approach. A Structural Equation Modeling framework was constructed and analyzed to understand public behavior toward building the country's first Nuclear Power Plant (NPP). Before analyzing the data, the model was validated. The research concluded that the benefits of nuclear power plants were essential in determining people's acceptance of NPPs. Surprisingly, the effect of the perceived benefits was found higher than the effect of the perceived risks to the acceptance. Furthermore, the public's participation in this study revealed that the NPPs location has a significant impact on their acceptance. Based on the finding, several policy implementations were suggested. Finally, the study's model results would benefit scholars, government agencies, and the business sector in Saudi Arabia and worldwide.
Salman, Kashif,Tran, Thanh-Tuan,Kim, Dookie Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.6
Structural modification in the electrical cabinet is investigated by a proposed procedure that comprises of an experimental, analytical and numerical solution. This research emphasizes the linear dynamic analysis of the cabinet that is studied under the seismic excitation to demonstrate the real behavior of the cabinets in NPP. To this end, an actual electric cabinet is experimentally tested using an impact hammer test which reveals the fundamental parameters of the cabinet. The Frequency-domain decomposition (FDD) method is used to extract the dynamic properties of the cabinet from the experiment which is then used for numerical modeling. To validate the dynamic properties of the cabinet an analytical solution is suggested. The calibrated model is analyzed under the floor response obtained from the Connecticut nuclear power plant structure excited by Tabas 1978 (Mw 7.4) earthquake. Eventually, the grouping effect of the cabinets is proposed which represents the influence on the dynamic modification. This grouping of the cabinets is described more sophisticatedly by the theoretical understating, which results in a significant change in the seismic response. Considering the grouping effects will be helpful in the assessment of the real seismic behavior, design, and performance of cabinets.
Salman Alizadeh Kordkandi,Ali Baradar Khoshfetrat,Asaad Faramarzi 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.61 No.-
A novel semi-mechanistic data-driven technique based on an evolutionary polynomial regression (EPR) was developed along with a kinetic analysis to evaluate the performance of an external loop upflow partially-aerated fixed-film bioreactor (UP/ASFF). Modelling of experimental data was carried out under different organic loading rates (OLR), solid retention time (SRT), and food to microorganisms’ ratio (F/M ratio). The results showed that the EPR model was the best approach for the performance evaluation of the UP/ASFF system with R2 of 0.93 and normalized MSE of 0.02 although the Stover-Kincannon’s model showed also a promising predication with high accuracy and R2 of 0.92.
Salman Alizadeh Kordkandi,Ali Baradar Khoshfetrat 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.31 No.-
Performance and energy efficiency of an upflow partially aerated submerged fixed-film (UP/ASFF)bioreactor was evaluated during a 10-month operation period. Increasing loading rates at constant HRTand COD/N increased nitrogen removals. Increase of non-aerated zone could also improve the nitrogenremovals up to 83%. Energy performance coefficient based on required electrical energy showed that theenergy efficiency of the system increases at lower COD/N value and bigger non-aerated zone forsimultaneous COD and nitrogen removal from the synthetic wastewater. The present study showed alsosimilar performance for municipal wastewater, demonstrating the potential of UP/ASFF system to treathigh-ammonium municipal wastewaters.
Design and Analysis of a Dual-Stator Spoke-Type Linear Vernier Machine for Wave Energy Extraction
Salman Khaliq,Byung-il Kwon 대한전기학회 2016 Journal of Electrical Engineering & Technology Vol.11 No.6
In this paper, a dual-stator, spoke-type linear vernier machine (DSSLVM) for wave energy extraction application was proposed. This machine is capable of producing a competitively high thrust force and force density at a low operation speed in direct drive systems. The operation principal and working of the proposed DSSLVM were studied. The stator core height is adjusted to improve the overall force density of the proposed machine while reducing the force ripple. To evaluate the advantages of the proposed DSSLVM, the main performance was compared with that of a recently developed linear primary permanent magnet vernier machine (LPPMVM). The proposed machine exhibited greater thrust force and force density, an improved power factor and lower force ripple with the same permanent magnet (PM) volume compared to the LPPMVM.