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684 results on '"Sheikh Ahmed"'

1. Revisiting iron oxidation chemistry in synthesis flames: Insights from a shock-tube study with intracavity laser absorption spectroscopy tracking of FeO

Author

Matthieu R. Lalanne, Sheikh Ahmed Mujaddadi, Peter Fjodorow, Sergey Cheskis, Holger Somnitz, Irenaeus Wlokas, Jürgen Herzler, Mustapha Fikri, Christof Schulz, and Igor Rahinov

Subjects
Shock tube, Intracavity absorption spectroscopy, Iron oxidation, Flame synthesis, Fuel, TP315-360, Energy industries. Energy policy. Fuel trade, HD9502-9502.5
Abstract

The reaction between Fe atoms and O2 in a mixture of iron-pentacarbonyl (IPC, 2 ppm) and oxygen (100 ppm), diluted in argon, has been studied in a shock tube behind reflected shock waves over the temperature and pressure ranges of 1050–3400 K and 0.7–2.0 bar. Time-resolved measurements of Fe and FeO have been performed simultaneously using a combination of atomic resonance absorption spectroscopy (ARAS) and intracavity laser absorption spectroscopy (ICAS) with a custom-made broadband dye laser, respectively. For ICAS, absorption features in the spectral range from 16,316 to 16,353 cm−1 have been evaluated, and the oscillator strengths for all 41 assigned ro-vibronic transitions have been expressed. For most of the experimental cases, the measured Fe and FeO traces agreed well with the mechanism reported in this work. The quantitative and highly-sensitive measurements revealed the presence of FeO at temperatures below 1400 K, leading to a reconsideration of rate coefficients for different Fe oxidation channels.

Published
2023
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2. A Real-Time Car Towing Management System Using ML-Powered Automatic Number Plate Recognition

Author

Ahmed Abdelmoamen Ahmed and Sheikh Ahmed

Subjects
real-time, image processing, ANPR, machine learning, mobile computing, Industrial engineering. Management engineering, T55.4-60.8, Electronic computers. Computer science, QA75.5-76.95
Abstract

Automatic Number Plate Recognition (ANPR) has been widely used in different domains, such as car park management, traffic management, tolling, and intelligent transport systems. Despite this technology’s importance, the existing ANPR approaches suffer from the accurate identification of number plats due to its different size, orientation, and shapes across different regions worldwide. In this paper, we are studying these challenges by implementing a case study for smart car towing management using Machine Learning (ML) models. The developed mobile-based system uses different approaches and techniques to enhance the accuracy of recognizing number plates in real-time. First, we developed an algorithm to accurately detect the number plate’s location on the car body. Then, the bounding box of the plat is extracted and converted into a grayscale image. Second, we applied a series of filters to detect the alphanumeric characters’ contours within the grayscale image. Third, the detected the alphanumeric characters’ contours are fed into a K-Nearest Neighbors (KNN) model to detect the actual number plat. Our model achieves an overall classification accuracy of 95% in recognizing number plates across different regions worldwide. The user interface is developed as an Android mobile app, allowing law-enforcement personnel to capture a photo of the towed car, which is then recorded in the car towing management system automatically in real-time. The app also allows owners to search for their cars, check the case status, and pay fines. Finally, we evaluated our system using various performance metrics such as classification accuracy, processing time, etc. We found that our model outperforms some state-of-the-art ANPR approaches in terms of the overall processing time.

Published
2021
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3. Fuzzy cross-entropy, mean, variance, skewness models for portfolio selection

Author

Rupak Bhattacharyya, Sheikh Ahmed Hossain, and Samarjit Kar

Subjects
Fuzzy stock portfolio selection problem, Fuzzy cross-entropy, Triangular fuzzy number, Genetic algorithm, Electronic computers. Computer science, QA75.5-76.95
Abstract

In this paper, fuzzy stock portfolio selection models that maximize mean and skewness as well as minimize portfolio variance and cross-entropy are proposed. Because returns are typically asymmetric, in addition to typical mean and variance considerations, third order moment skewness is also considered in generating a larger payoff. Cross-entropy is used to quantify the level of discrimination in a return for a given satisfactory return value. As returns are uncertain, stock returns are considered triangular fuzzy numbers. Stock price data from the Bombay Stock Exchange are used to illustrate the effectiveness of the proposed model. The solutions are done by genetic algorithms.

Published
2014
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4. Users and Groups

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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5. Installing Linux

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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6. Administrative Tasks

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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7. Working with Linux: Part 1

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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8. Shells, Scripts, and Data Management

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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9. Hardware and Process Settings

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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10. Desktop and User Interface

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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11. Introduction to Linux and Linux Certification

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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12. Boot Process and Shutdown

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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13. Working with Files, Directories, and Permissions

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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14. Software Installation

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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15. Essential System Services

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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16. Security

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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17. Networking Fundamentals

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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18. Working with Linux: Part 2

Author

Sheikh, Ahmed F., Byrnes, Ryan, Editorial Board Member, Chatterjee, Spandana, Editorial Board Member, Duffy, Melissa, Editorial Board Member, Elson, Shaul, Editorial Board Member, Haidara, Miriam, Editorial Board Member, John, Celestin Suresh, Editorial Board Member, McDermott, Susan, Editorial Board Member, Mirashi, Aditee, Editorial Board Member, Rajendran, Malini, Editorial Board Member, Ramachandran, Shiva, Editorial Board Member, Robinson-Prior, James, Editorial Board Member, Srivastava, Smriti, Editorial Board Member, and Sheikh, Ahmed F.

Published
2024
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