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Mohammed Siddig Hassan Mohammed
Department of Nuclear Engineering , King Abdulaziz University Jeddah , 21589 , Saudi Arabia

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Journal article
Published: 01 March 2021 in Nukleonika
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Radioactive sealed sources and radiotracer techniques are used to diagnose industrial process units. This work introduces a workspace to simulate four sealed sources and radiotracer applications, namely, gamma scanning of distillation columns, gamma scanning of pipes, gamma transmission tomography, and radiotracer flow rate measurements. The workspace was created in Geant4 Application for Tomographic Emission (GATE) simulation toolkit and was called Industrial Radioisotope Applications Virtual Laboratory. The flexibility of GATE and the fact that it is an open-source software render it advantageous to radioisotope technology practitioners, educators, and students. The comparison of the simulation results with experimental results that are available in the literature showed the effectiveness of the virtual laboratory.

ACS Style

Mohammed Siddig H. Mohammed; Essam M. Banoqitah; Ezzat Elmoujarkach; Abdulsalam M. Alhawsawi; Fathi Djouider. A virtual laboratory for radiotracer and sealed-source applications in industry. Nukleonika 2021, 66, 21 -27.

AMA Style

Mohammed Siddig H. Mohammed, Essam M. Banoqitah, Ezzat Elmoujarkach, Abdulsalam M. Alhawsawi, Fathi Djouider. A virtual laboratory for radiotracer and sealed-source applications in industry. Nukleonika. 2021; 66 (1):21-27.

Chicago/Turabian Style

Mohammed Siddig H. Mohammed; Essam M. Banoqitah; Ezzat Elmoujarkach; Abdulsalam M. Alhawsawi; Fathi Djouider. 2021. "A virtual laboratory for radiotracer and sealed-source applications in industry." Nukleonika 66, no. 1: 21-27.

Journal article
Published: 28 December 2020 in Sustainability
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As system thinking is a recognized approach to the comprehension and realization of energy sustainability, this paper applies a holistic representation to the World Energy Trilemma Index (WETI) key indicators using Bayesian Belief Networks (BBN) to illuminate the probabilistic information of their influences in Saudi Arabia’s context. The reached realization is suggested to inform the policies to improve energy sustainability, and thus the country’s rank in the WETI. The analysis used two groups of learning cases, one used the energy statistics of the period from 1995 to 2019 to show the outlook of the Business as Usual path, and the other addressed the projected data for the period from 2018 to 2037 to investigate the expected impact of the new policies. For both BAU and new policies, the BBN calculated the improvement, stability, and declining beliefs. The most influential factors on energy sustainability performance were the electricity generation mix, CO2 emissions, energy intensity, and energy storage. Moreover, the interlinkage between the influential indicators and their causes was estimated in the new policies model. A back-casting analysis was carried out to show the changes required to drive the improvement belief to 100%. The compiled BBN can be used to support structuring policymaking and analyzing the projections’ outcomes by investigating different scenarios for improvement probabilities of energy sustainability.

ACS Style

Mohammed Mohammed; Abdulsalam Alhawsawi; Abdelfattah Soliman. An Integrated Approach to the Realization of Saudi Arabia’s Energy Sustainability. Sustainability 2020, 13, 205 .

AMA Style

Mohammed Mohammed, Abdulsalam Alhawsawi, Abdelfattah Soliman. An Integrated Approach to the Realization of Saudi Arabia’s Energy Sustainability. Sustainability. 2020; 13 (1):205.

Chicago/Turabian Style

Mohammed Mohammed; Abdulsalam Alhawsawi; Abdelfattah Soliman. 2020. "An Integrated Approach to the Realization of Saudi Arabia’s Energy Sustainability." Sustainability 13, no. 1: 205.

Originalpaper
Published: 01 January 2020 in Russian Journal of Nondestructive Testing
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In the in-service radiographic testing of water-filled pipes, the interaction of radiation with water diminishes the quality of the transmitted radiation to cause severe degradation in the radiographic sensitivity. In this paper, simulation work was carried out to investigate the radiographic testing of a water-filled pipe using X-ray and Ir-192 gamma source. The radiation reaching the film was studied, and accordingly, an approach to improve the radiographic sensitivity by optimizing the radiographic screen to control the scattered radiation was proposed. The approach showed promising indications, so the experimental work was proceeded using X-ray to validate the simulation results. The sensitivity, measured by the visibility of the Image Quality Indicator, was better in the radiographs obtained utilizing the proposed approach than that offered in the test used the standard screens.

ACS Style

Tariq O. Mousa; Mohammed Siddig Hassan Mohammed; Mohammad S. Aljohani. Optimizing Radiographic Sensitivity in the In-Service Testing of Pipes. Russian Journal of Nondestructive Testing 2020, 56, 92 -99.

AMA Style

Tariq O. Mousa, Mohammed Siddig Hassan Mohammed, Mohammad S. Aljohani. Optimizing Radiographic Sensitivity in the In-Service Testing of Pipes. Russian Journal of Nondestructive Testing. 2020; 56 (1):92-99.

Chicago/Turabian Style

Tariq O. Mousa; Mohammed Siddig Hassan Mohammed; Mohammad S. Aljohani. 2020. "Optimizing Radiographic Sensitivity in the In-Service Testing of Pipes." Russian Journal of Nondestructive Testing 56, no. 1: 92-99.

Journal article
Published: 29 November 2019 in Journal of Nuclear Engineering and Radiation Science
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A workspace is created within the geant4 Application for Tomographic Emission (gate) software toolkit for radiographic nondestructive testing (NDT) simulations. The workspace contains models for X-ray and gamma ray emissions, test sample geometries, radiation interaction with the test sample, and image receptors to afford a radiographic NDT setup. The setup is then evaluated by simulating radiographic testing (RT) of stainless-steel step-wedges and a carbon steel flawed welded plate. The results are validated by comparing a simulated step-wedge image to an experimental radiograph. The workspace can be advantageous to the industrial radiography specialists who are unfamiliar with medical imaging software. Running the simulation does not require working knowledge of gate; the open-source software toolkit.

ACS Style

Eslam Taha; Mohammed Siddig Hassan Mohammed; Essam Banoqitah. Radiographic Nondestructive Testing Simulations Using gate Software Toolkit. Journal of Nuclear Engineering and Radiation Science 2019, 6, 1 .

AMA Style

Eslam Taha, Mohammed Siddig Hassan Mohammed, Essam Banoqitah. Radiographic Nondestructive Testing Simulations Using gate Software Toolkit. Journal of Nuclear Engineering and Radiation Science. 2019; 6 (1):1.

Chicago/Turabian Style

Eslam Taha; Mohammed Siddig Hassan Mohammed; Essam Banoqitah. 2019. "Radiographic Nondestructive Testing Simulations Using gate Software Toolkit." Journal of Nuclear Engineering and Radiation Science 6, no. 1: 1.

Journal article
Published: 01 November 2019 in Insight - Non-Destructive Testing and Condition Monitoring
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A three-dimensional surface mapping method for ultrasonic thickness measurements is proposed to enable the dimensions and positions of measured values obtained by the conventional ultrasonic thickness gauges and flaw detectors on curved surfaces to be determined. The proposed system consists of a laser pattern generator and image processing methods. The laser grid produced by the pattern generator is projected onto the surface of the item to be inspected, mathematical relationships are developed to localise the grid nodes on the inspection surface and images are then captured using a complementary metal-oxide semiconductor (CMOS) camera. An image processing algorithm is developed to plot the scanned surface. The measurements performed using a thickness gauge are correlated with the plotted surface, which will enable thickness mapping. The experiments were carried out on a pipe with an artificial metal loss defect and the results showed that the developed method can accurately locate measured thickness values on a three-dimensional plotted surface.

ACS Style

T Tesfaye; Mohammed Siddig Hassan Mohammed; K Ki-Seong. Mapping of ultrasonic thickness measurements using laser grid projection and image processing. Insight - Non-Destructive Testing and Condition Monitoring 2019, 61, 643 -649.

AMA Style

T Tesfaye, Mohammed Siddig Hassan Mohammed, K Ki-Seong. Mapping of ultrasonic thickness measurements using laser grid projection and image processing. Insight - Non-Destructive Testing and Condition Monitoring. 2019; 61 (11):643-649.

Chicago/Turabian Style

T Tesfaye; Mohammed Siddig Hassan Mohammed; K Ki-Seong. 2019. "Mapping of ultrasonic thickness measurements using laser grid projection and image processing." Insight - Non-Destructive Testing and Condition Monitoring 61, no. 11: 643-649.

Review
Published: 16 February 2019 in Engineering, Technology & Applied Science Research
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Ultrasonic non-destructive testing signal can be decomposed into a set of chirplet signals, which makes the chirplet transform a fitting ultrasonic signal analysis and processing method. Moreover, compared to wavelet transform, short-time Fourier transform and Gabor transform, chirplet transform is a comprehensive signal approximation method, nevertheless, the former methods gained more popularity in the ultrasonic signal processing research. In this paper, the principles of the chirplet transform are explained with a simplified presentation and the studies that used the transform in ultrasonic non-destructive testing and in structural health monitoring are reviewed to expose the existing applications and motivate the research in the potential ones.

ACS Style

Mohammed Siddig Hassan Mohammed; K. Ki-Seong. Chirplet Transform in Ultrasonic Non-Destructive Testing and Structural Health Monitoring: A Review. Engineering, Technology & Applied Science Research 2019, 9, 3778 -3781.

AMA Style

Mohammed Siddig Hassan Mohammed, K. Ki-Seong. Chirplet Transform in Ultrasonic Non-Destructive Testing and Structural Health Monitoring: A Review. Engineering, Technology & Applied Science Research. 2019; 9 (1):3778-3781.

Chicago/Turabian Style

Mohammed Siddig Hassan Mohammed; K. Ki-Seong. 2019. "Chirplet Transform in Ultrasonic Non-Destructive Testing and Structural Health Monitoring: A Review." Engineering, Technology & Applied Science Research 9, no. 1: 3778-3781.

Journal article
Published: 01 November 2017 in Insight - Non-Destructive Testing and Condition Monitoring
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This work aims to enhance the filtering performance of the recursive least-squares adaptive algorithm in the ultrasonic testing of materials by processing the primary input of the filter to improve the correlation properties of the signal and noise and enhance the adaptation and filtering process. The preprocessing is carried out using the SURE and universal threshold methods, which were originally used in wavelet denoising. The standard and proposed realisations of the recursive least-squares filter were applied to process simulated ultrasonic grain noise signals and the echo signals of experimental defects. Preprocessing using the SURE method did not offer good results in the simulation study. The results of the simulation and experimental studies showed that the proposed configuration of the recursive least-squares filter using the universal method performs better than the standard recursive least-squares filter.

ACS Style

Mohammed Siddig Hassan Mohammed; Kim Ki-Seong. Signal conditioning for the recursive least-squares filter in ultrasonic testing of materials. Insight - Non-Destructive Testing and Condition Monitoring 2017, 59, 591 -595.

AMA Style

Mohammed Siddig Hassan Mohammed, Kim Ki-Seong. Signal conditioning for the recursive least-squares filter in ultrasonic testing of materials. Insight - Non-Destructive Testing and Condition Monitoring. 2017; 59 (11):591-595.

Chicago/Turabian Style

Mohammed Siddig Hassan Mohammed; Kim Ki-Seong. 2017. "Signal conditioning for the recursive least-squares filter in ultrasonic testing of materials." Insight - Non-Destructive Testing and Condition Monitoring 59, no. 11: 591-595.

Journal article
Published: 01 January 2017 in World Journal of Engineering and Technology
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Detection of the signal’s breakdown points is important for many science and engineering applications. Numerous signal processing methods have been used for this purpose. Of these, the adaptive prediction is simple and easy to implement, however; its simplicity and robustness are hindered by the required delay in the input signal. This paper introduces an efficient alternative to the adaptive prediction in the application of breakdown and inflection points’ detection. Unlike the adaptive predictor, the proposed filter doesn’t require a delay in the primary input to produce the filter’s reference input, which significantly improves the computation speed and overcome the problem of performance sensitivity to the delay value. The Normalized Least-Mean Squares algorithm was used to realize both the adaptive predictor and the proposed filter. The filters were implemented in LabVIEW system design software. The performances of the filters were studied using simulated signals and the simulation results were verified using an experimental signal. The simulation and experimental results showed that the proposed filter efficiently detects the signal breakdowns. Furthermore, the simplicity of the filter offered a significant improvement in the computation speed.

ACS Style

Mohammed Siddig Hassan Mohammed; Kim Ki-Seong. An Identical Inputs-Adaptive Filter for the Detection of Signal’s Breakdown Points. World Journal of Engineering and Technology 2017, 05, 232 -240.

AMA Style

Mohammed Siddig Hassan Mohammed, Kim Ki-Seong. An Identical Inputs-Adaptive Filter for the Detection of Signal’s Breakdown Points. World Journal of Engineering and Technology. 2017; 05 (02):232-240.

Chicago/Turabian Style

Mohammed Siddig Hassan Mohammed; Kim Ki-Seong. 2017. "An Identical Inputs-Adaptive Filter for the Detection of Signal’s Breakdown Points." World Journal of Engineering and Technology 05, no. 02: 232-240.

Journal article
Published: 01 May 2014 in Insight - Non-Destructive Testing and Condition Monitoring
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ACS Style

M S Mohammed; Kim Ki-Seong. Improving an adaptive filtering system for ultrasonic testing. Insight - Non-Destructive Testing and Condition Monitoring 2014, 56, 240 -245.

AMA Style

M S Mohammed, Kim Ki-Seong. Improving an adaptive filtering system for ultrasonic testing. Insight - Non-Destructive Testing and Condition Monitoring. 2014; 56 (5):240-245.

Chicago/Turabian Style

M S Mohammed; Kim Ki-Seong. 2014. "Improving an adaptive filtering system for ultrasonic testing." Insight - Non-Destructive Testing and Condition Monitoring 56, no. 5: 240-245.

Journal article
Published: 01 April 2014 in Russian Journal of Nondestructive Testing
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The influence of the material’s surface roughness on ultrasonic echo signals has been well studied and documented in the literature. However, these studies were mostly based on the monitoring of absolute value of the echo amplitude, which cannot quantify a defect’s detectability. In this work, the influence of the surface roughness on the Probability of Detection (POD) of a defect is studied using POD simulations to provide quantitative and insightful analysis. Furthermore, POD simulations are used to quantify the influence of surface roughness on the parameters of ultrasonic testing procedure. A steel block having non-metallic inclusions type of defects was inspected by simulations using CIVA software. The inspection used the ultrasonic immersion pulse-echo setup with straight beam and angle beam techniques. Comprehensive POD curves are obtained, discussed and analyzed.

ACS Style

M. S. Mohammed; Kim Ki-Seong. Probability of detection simulations to study the influence of surface roughness on the reliability of ultrasonic testing system. Russian Journal of Nondestructive Testing 2014, 50, 239 -247.

AMA Style

M. S. Mohammed, Kim Ki-Seong. Probability of detection simulations to study the influence of surface roughness on the reliability of ultrasonic testing system. Russian Journal of Nondestructive Testing. 2014; 50 (4):239-247.

Chicago/Turabian Style

M. S. Mohammed; Kim Ki-Seong. 2014. "Probability of detection simulations to study the influence of surface roughness on the reliability of ultrasonic testing system." Russian Journal of Nondestructive Testing 50, no. 4: 239-247.

Journal article
Published: 01 November 2013 in Insight - Non-Destructive Testing and Condition Monitoring
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ACS Style

M S Mohammed; Kim Ki-Seong. UT Signal Processing: Application of variant least mean squares adaptive algorithms for filtering material grain noise. Insight - Non-Destructive Testing and Condition Monitoring 2013, 55, 593 -595.

AMA Style

M S Mohammed, Kim Ki-Seong. UT Signal Processing: Application of variant least mean squares adaptive algorithms for filtering material grain noise. Insight - Non-Destructive Testing and Condition Monitoring. 2013; 55 (11):593-595.

Chicago/Turabian Style

M S Mohammed; Kim Ki-Seong. 2013. "UT Signal Processing: Application of variant least mean squares adaptive algorithms for filtering material grain noise." Insight - Non-Destructive Testing and Condition Monitoring 55, no. 11: 593-595.

Journal article
Published: 01 March 2013 in Russian Journal of Nondestructive Testing
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The digital smoothing polynomial filter or Savitzky-Golay filter, which is assumed to be appropriate for ultrasonic IRIS applications due to its ability of conciliation between the high smoothing level and degree of peak retention, fits a set of data points to a polynomial by applying least-squares fitting. In this study, the performance of the digital smoothing polynomial filter is evaluated in terms of signal-to-noise ratio and interface echoes preservation. Moreover, a smoothing polynomial filter that works in a cascade setup is proposed to take advantage of the conciliation ability of the standard filter. The theory and experiments of the polynomial smoothing filter are presented, and graphical results are given. The evaluation results of the digital smoothing polynomial filter showed its efficiency in smoothing and echo signals reproduction. The proposed cascade filter gave considerable advantages.

ACS Style

M. S. Mohammed; Kim Ki-Seong. Performance evaluation of the digital smoothing polynomial filter in ultrasonic IRIS applications. Russian Journal of Nondestructive Testing 2013, 49, 159 -163.

AMA Style

M. S. Mohammed, Kim Ki-Seong. Performance evaluation of the digital smoothing polynomial filter in ultrasonic IRIS applications. Russian Journal of Nondestructive Testing. 2013; 49 (3):159-163.

Chicago/Turabian Style

M. S. Mohammed; Kim Ki-Seong. 2013. "Performance evaluation of the digital smoothing polynomial filter in ultrasonic IRIS applications." Russian Journal of Nondestructive Testing 49, no. 3: 159-163.

Journal article
Published: 01 October 2012 in Russian Journal of Nondestructive Testing
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Sign LMS algorithms, members of the simplified adaptive least-mean-squares class, have been developed to reduce computational complexity and simplify hardware implementation. These advantages make them suitable to utilize in ultrasonic testing units, a class of applications requiring simple and efficient signal processing algorithms. This paper proposes a specific sign LMS adaptive filters-based deconvolution technique for ultrasonic straight beam pulse-echo inspections. It extracts only two of the interface echoes multiple reflections for enhanced resolution and quality-enriched presentation; this technique is named “selective deconvolution”. Resolution enhancement and presentation’s quality enrichment performance among the different sign LMS algorithms were investigated by experiments, and based on performance, the methods themselves were compared. Computational requirements are also presented. The proposed technique with the various adaptive sign LMS filters gave satisfactory results.

ACS Style

M. S. Mohammed; Kim Ki-Seong. Sign least mean squares-based deconvolution technique for ultrasonic testing. Russian Journal of Nondestructive Testing 2012, 48, 609 -613.

AMA Style

M. S. Mohammed, Kim Ki-Seong. Sign least mean squares-based deconvolution technique for ultrasonic testing. Russian Journal of Nondestructive Testing. 2012; 48 (10):609-613.

Chicago/Turabian Style

M. S. Mohammed; Kim Ki-Seong. 2012. "Sign least mean squares-based deconvolution technique for ultrasonic testing." Russian Journal of Nondestructive Testing 48, no. 10: 609-613.

Journal article
Published: 01 July 2012 in Insight - Non-Destructive Testing and Condition Monitoring
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ACS Style

M S Mohammed; Kim Ki-Seong. Shift-invariant wavelet packet for signal de-noising in ultrasonic testing. Insight - Non-Destructive Testing and Condition Monitoring 2012, 54, 366 -370.

AMA Style

M S Mohammed, Kim Ki-Seong. Shift-invariant wavelet packet for signal de-noising in ultrasonic testing. Insight - Non-Destructive Testing and Condition Monitoring. 2012; 54 (7):366-370.

Chicago/Turabian Style

M S Mohammed; Kim Ki-Seong. 2012. "Shift-invariant wavelet packet for signal de-noising in ultrasonic testing." Insight - Non-Destructive Testing and Condition Monitoring 54, no. 7: 366-370.

Journal article
Published: 01 May 2012 in Russian Journal of Nondestructive Testing
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Adaptive filters, with their efficiency and simplicity, have been used successfully in various ultrasonic NDT signal processing contexts. Of these, the adaptive deconvolution with the conventional least-mean-squares (LMS) adaptive filter has improved time resolution. However; the convergence speed of LMS is restricted by the eigenvalue spread of the input correlation matrix. This paper explores the potential of other adaptive algorithms, namely, normalized least-mean-squares (NLMS), recursive least squares (RLS) and QR-decomposition-based RLS (QR-RLS) to handle the deconvolution of ultrasonic NDT signals and compare their performances with that of the conventional LMS algorithm. Furthermore, the mean square error (MSE) behavior in the different adaptive filtering algorithms for ultrasonic NDT signals deconvolution is briefly introduced. Experiments results are explained by graphs and discussed based on the performance criteria. The proposed methods enhanced the resolution quality, offering more alternatives for this application according to specific case requirements.

ACS Style

M. S. Mohammed; Kim Ki-Seong. Adaptive methods for resolution enhancement of ultrasonic NDT signals: Comparative exploration. Russian Journal of Nondestructive Testing 2012, 48, 285 -290.

AMA Style

M. S. Mohammed, Kim Ki-Seong. Adaptive methods for resolution enhancement of ultrasonic NDT signals: Comparative exploration. Russian Journal of Nondestructive Testing. 2012; 48 (5):285-290.

Chicago/Turabian Style

M. S. Mohammed; Kim Ki-Seong. 2012. "Adaptive methods for resolution enhancement of ultrasonic NDT signals: Comparative exploration." Russian Journal of Nondestructive Testing 48, no. 5: 285-290.