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  • 1
    In: Biomedical Signal Processing and Control, Elsevier BV, Vol. 66 ( 2021-04), p. 102481-
    Type of Medium: Online Resource
    ISSN: 1746-8094
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 2241886-6
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  • 2
    Online Resource
    Online Resource
    Scientific Research Publishing, Inc. ; 2022
    In:  Communications and Network Vol. 14, No. 04 ( 2022), p. 119-170
    In: Communications and Network, Scientific Research Publishing, Inc., Vol. 14, No. 04 ( 2022), p. 119-170
    Type of Medium: Online Resource
    ISSN: 1949-2421 , 1947-3826
    Language: Unknown
    Publisher: Scientific Research Publishing, Inc.
    Publication Date: 2022
    detail.hit.zdb_id: 2649300-7
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  • 3
    In: African Health Sciences, African Journals Online (AJOL), Vol. 20, No. 4 ( 2020-12-16), p. 1849-56
    Abstract: Background: The incidence of thyroid cancer is increasing worldwide at an alarming rate. BRAFV600E mutation is described to be associated with a worse prognostic of thyroid carcinomas, as well as extrathyroidal invasion and increased mortality. Objective: To our knowledge, there are no reported studies neither from Morocco nor from other Maghreb countries re- garding the prevalence of BRAFV600E mutation in thyroid carcinomas. Here we aim to evaluate the frequency of BRAFV600E oncogene in Moroccan thyroid carcinomas. Methods: In this Single-Institution retrospective study realized in the Anatomic Pathology and Histology Service in the Mil- itary Hospital of Instruction Mohammed V ‘HMIMV’ in Rabat, we report, using direct genomic sequencing, the assessment of BRAFV600E in 37 thyroid tumors. Results: We detected BRAFV600E mutation exclusively in Papillary Thyroid Carcinomas ‘PTC’ with a prevalence of 28% (8 PTC out 29 PTC). Like international trends, Papillary Thyroid Carcinomas ’PTC’ is more frequent than Follicular Thyroid Carcinomas ‘FTC’ and Anaplastic Thyroid Carcinomas ‘ATC’ (29 PTC, 7 FTC and 1 ATC). Conclusion: Our finding gives to the international community the first estimated incidence of this oncogene in Morocco showing that this prevalence falls within the range of international trends (30% to 90%) reported in distinct worldwide ge- ographic regions. Keywords: Biomarker; BRAFV600E; Thyroid cancer; Morocco. 
    Type of Medium: Online Resource
    ISSN: 1680-6905
    Language: Unknown
    Publisher: African Journals Online (AJOL)
    Publication Date: 2020
    detail.hit.zdb_id: 2179903-9
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  • 4
    In: Applied Sciences, MDPI AG, Vol. 13, No. 1 ( 2022-12-28), p. 383-
    Abstract: GPS spoofing attacks are a severe threat to unmanned aerial vehicles. These attacks manipulate the true state of the unmanned aerial vehicles, potentially misleading the system without raising alarms. Several techniques, including machine learning, have been proposed to detect these attacks. Most of the studies applied machine learning models without identifying the best hyperparameters, using feature selection and importance techniques, and ensuring that the used dataset is unbiased and balanced. However, no current studies have discussed the impact of model parameters and dataset characteristics on the performance of machine learning models; therefore, this paper fills this gap by evaluating the impact of hyperparameters, regularization parameters, dataset size, correlated features, and imbalanced datasets on the performance of six most commonly known machine learning techniques. These models are Classification and Regression Decision Tree, Artificial Neural Network, Random Forest, Logistic Regression, Gaussian Naïve Bayes, and Support Vector Machine. Thirteen features extracted from legitimate and simulated GPS attack signals are used to perform this investigation. The evaluation was performed in terms of four metrics: accuracy, probability of misdetection, probability of false alarm, and probability of detection. The results indicate that hyperparameters, regularization parameters, correlated features, dataset size, and imbalanced datasets adversely affect a machine learning model’s performance. The results also show that the Classification and Regression Decision Tree classifier has an accuracy of 99.99%, a probability of detection of 99.98%, a probability of misdetection of 0.2%, and a probability of false alarm of 1.005%, after removing correlated features and using tuned parameters in a balanced dataset. Random Forest can achieve an accuracy of 99.94%, a probability of detection of 99.6%, a probability of misdetection of 0.4%, and a probability of false alarm of 1.01% in similar conditions.
    Type of Medium: Online Resource
    ISSN: 2076-3417
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2704225-X
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  • 5
    In: Computers & Security, Elsevier BV, Vol. 126 ( 2023-03), p. 103085-
    Type of Medium: Online Resource
    ISSN: 0167-4048
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2023
    detail.hit.zdb_id: 2001917-8
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  • 6
    In: Journal of Applied Polymer Science, Wiley, Vol. 138, No. 10 ( 2021-03-10)
    Abstract: We report the synthesis and characterization of PEEK‐MAX (Ti 3 SiC 2 , Ti 3 AlC 2 , and Cr 2 AlC), and PEEK‐MoAlB composites by hot‐pressing. Detailed microstructure analysis by scanning electron microscopy showed that Ti 3 SiC 2 particles are well dispersed in the PEEK matrix after the addition of 5 vol% Ti 3 SiC 2 but at higher concentration (≥10 vol%), the Ti 3 SiC 2 particles segregated at the phase boundaries and formed interpenetrating micro‐networks. PEEK‐Ti 3 AlC 2 and PEEK‐MoAlB composites also showed similar structuring at the microstructural level. PEEK‐Cr 2 AlC composites showed a different behavior where Cr 2 AlC particles were well dispersed in the PEEK matrix. All the three PEEK‐MAX composites have lower hardness than PEEK‐MoAlB composites as MoAlB particulates are appreciably harder than MAX phases but were harder than PEEK. Due to heterogenous nucleation, the addition of MAX phases or MoAlB reduced the crystallization temperature ( T c ) by a few o C. The formation of imperfect crystals also resulted in the lowering of melting point ( T m ) of these composites. PEEK reinforced with 10 vol% Ti 3 SiC 2 , Ti 3 AlC 2 and MoAlB showed plastic failure, and had higher strength than PEEK. Comparatively, PEEK reinforced with 10 vol% Cr 2 AlC did not show any enhancement. All the PEEK‐MAX and PEEK‐MoAlB composites showed triboactive behavior and enhanced wear resistance.
    Type of Medium: Online Resource
    ISSN: 0021-8995 , 1097-4628
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 1491105-X
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  • 7
    Online Resource
    Online Resource
    Wiley ; 2022
    In:  Concurrency and Computation: Practice and Experience Vol. 34, No. 24 ( 2022-11)
    In: Concurrency and Computation: Practice and Experience, Wiley, Vol. 34, No. 24 ( 2022-11)
    Abstract: Mammography is a commonly used screening technique for early diagnosis of breast cancer. However, the early detection of abnormalities remains challenging, particularly for dense breast categories. In this context, the automated classification of breast masses assists radiologists in their diagnosis and give them a second opinion. In this paper, we propose a machine learning‐based method for the classification of breast masses. First, the shape and texture features are extracted from the suspicious mammogram patches. These features are then fed to the Principal Component Analysis (PCA) to keep the relevant features only and are classified using the Support Vector Machine (SVM) and Random Forest (RF). Lastly, the Apriori dynamic selection method is applied for the final test predictions using the appropriate classifier for each test sample. The classification of breast masses patches into normal and abnormal attains accuracy of 96.43%, F 1‐score of 95.76%, precision of 96.29%, recall of 95.27%, specificity of 96.43%, and AUC of 0.963. Whereas the one‐stage multi‐classification of breast masses into normal, benign, and malignant achieves accuracy of 75.81%, F 1‐score of 76.47%, precision of 76.85%, recall of 78.77%, specificity of 87.91%, and AUC of 0.829.
    Type of Medium: Online Resource
    ISSN: 1532-0626 , 1532-0634
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2052606-4
    SSG: 11
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  • 8
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2023
    In:  Neural Computing and Applications
    In: Neural Computing and Applications, Springer Science and Business Media LLC
    Abstract: The current development in deep learning is witnessing an exponential transition into automation applications. This automation transition can provide a promising framework for higher performance and lower complexity. This ongoing transition undergoes several rapid changes, resulting in the processing of the data by several studies, while it may lead to time-consuming and costly models. Thus, to address these challenges, several studies have been conducted to investigate deep learning techniques; however, they mostly focused on specific learning approaches, such as supervised deep learning. In addition, these studies did not comprehensively investigate other deep learning techniques, such as deep unsupervised and deep reinforcement learning techniques. Moreover, the majority of these studies neglect to discuss some main methodologies in deep learning, such as transfer learning, federated learning, and online learning. Therefore, motivated by the limitations of the existing studies, this study summarizes the deep learning techniques into supervised, unsupervised, reinforcement, and hybrid learning-based models. In addition to address each category, a brief description of these categories and their models is provided. Some of the critical topics in deep learning, namely, transfer, federated, and online learning models, are explored and discussed in detail. Finally, challenges and future directions are outlined to provide wider outlooks for future researchers.
    Type of Medium: Online Resource
    ISSN: 0941-0643 , 1433-3058
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 1136944-9
    detail.hit.zdb_id: 1480526-1
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  • 9
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2020
    In:  Multimedia Tools and Applications Vol. 79, No. 27-28 ( 2020-07), p. 18941-18979
    In: Multimedia Tools and Applications, Springer Science and Business Media LLC, Vol. 79, No. 27-28 ( 2020-07), p. 18941-18979
    Type of Medium: Online Resource
    ISSN: 1380-7501 , 1573-7721
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2020
    detail.hit.zdb_id: 1287642-2
    detail.hit.zdb_id: 1479928-5
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  • 10
    Online Resource
    Online Resource
    MDPI AG ; 2022
    In:  Sensors Vol. 22, No. 2 ( 2022-01-15), p. 662-
    In: Sensors, MDPI AG, Vol. 22, No. 2 ( 2022-01-15), p. 662-
    Abstract: Unmanned aerial vehicles are prone to several cyber-attacks, including Global Positioning System spoofing. Several techniques have been proposed for detecting such attacks. However, the recurrence and frequent Global Positioning System spoofing incidents show a need for effective security solutions to protect unmanned aerial vehicles. In this paper, we propose two dynamic selection techniques, Metric Optimized Dynamic selector and Weighted Metric Optimized Dynamic selector, which identify the most effective classifier for the detection of such attacks. We develop a one-stage ensemble feature selection method to identify and discard the correlated and low importance features from the dataset. We implement the proposed techniques using ten machine-learning models and compare their performance in terms of four evaluation metrics: accuracy, probability of detection, probability of false alarm, probability of misdetection, and processing time. The proposed techniques dynamically choose the classifier with the best results for detecting attacks. The results indicate that the proposed dynamic techniques outperform the existing ensemble models with an accuracy of 99.6%, a probability of detection of 98.9%, a probability of false alarm of 1.56%, a probability of misdetection of 1.09%, and a processing time of 1.24 s.
    Type of Medium: Online Resource
    ISSN: 1424-8220
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2052857-7
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