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  • 1
    Online Resource
    Online Resource
    Slovenian Association Informatika ; 2023
    In:  Informatica Vol. 47, No. 2 ( 2023-06-05)
    In: Informatica, Slovenian Association Informatika, Vol. 47, No. 2 ( 2023-06-05)
    Type of Medium: Online Resource
    ISSN: 1854-3871 , 0350-5596
    Language: Unknown
    Publisher: Slovenian Association Informatika
    Publication Date: 2023
    detail.hit.zdb_id: 2212804-9
    SSG: 24,1
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  • 2
    In: Complexity, Hindawi Limited, Vol. 2021 ( 2021-3-15), p. 1-12
    Abstract: Seasonal outbreaks have several different periods that occur primarily during winter in temperate regions, while influenza may occur throughout the year in tropical regions, triggering outbreaks more irregularly. Similarly, dengue occurs in the star of the rainy season in early May and reaches its peak in late June. Dengue and flu brought an impact on various countries in the years 2017–2019 and streaming Twitter data reveals the status of dengue and flu outbreaks in the most affected regions. This research work presents that Social Media Analysis (SMA) can be used as a detector of the epidemic outbreak and to understand the sentiment of social media users regarding various diseases. Providing awareness about seasonal outbreaks through SMA is an effective approach for researchers and healthcare responders to detect the early outbreaks. The proposed model aims to find the sentiment about the disease in tweets, and the seasonal outbreaks-related tweets are classified into two classes as disease positive and disease negative. This work proposes a machine-learning-based approach to detect dengue and flu outbreaks in social media platform Twitter, using four machine learning algorithms: Random Forest (RF), K-Nearest Neighbor (KNN), Support Vector Machine (SVM), and Decision Tree (DT), with the help of Term Frequency and Inverse Document Frequency (TF-IDF). For experimental analysis, two datasets (dengue and flu) are analyzed individually. The experimental results show that the RF classifier has outperformed the comparison models in terms of improved accuracy, precision, recall, F1-measure, and Receiver Operating Characteristic (ROC) curve. The proposed work offers favorable performance with total precision, accuracy, recall, and F1-measure ranging from 84% to 88% for conventional machine learning techniques.
    Type of Medium: Online Resource
    ISSN: 1099-0526 , 1076-2787
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2021
    detail.hit.zdb_id: 2004607-8
    SSG: 11
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  • 3
    Online Resource
    Online Resource
    Computers, Materials and Continua (Tech Science Press) ; 2023
    In:  Intelligent Automation & Soft Computing Vol. 37, No. 1 ( 2023), p. 939-970
    In: Intelligent Automation & Soft Computing, Computers, Materials and Continua (Tech Science Press), Vol. 37, No. 1 ( 2023), p. 939-970
    Type of Medium: Online Resource
    ISSN: 1079-8587
    Language: English
    Publisher: Computers, Materials and Continua (Tech Science Press)
    Publication Date: 2023
    detail.hit.zdb_id: 2716453-6
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  • 4
    In: Sustainability, MDPI AG, Vol. 12, No. 13 ( 2020-07-01), p. 5320-
    Abstract: The United Nations (UN) 2030 agenda involved 17 Sustainable Development Goals (SDGs) to achieve a better and more sustainable world for all. The fourth Sustainable Development Goal called for “ensuring inclusive and equitable quality education and promoting lifelong learning opportunities for all”. Despite international efforts to achieve such a goal, many students with vision impairment (VI) who wish to pursue a degree in computer science face significant challenges and must overcome social and technical obstacles. One challenge is learning how to program as a key skill for pursuing a degree in the field of computer science. This paper explores practical issues in teaching students with VI the basics of programming and presents recommended practices based on a suggested workshop setup. The workshop ran for three weeks, for a total of 60 teaching hours, and involved designing and implementing complete curricula and multi-modal activities to simplify the acquisition of basic programming concepts. Workshop data was collected using several data collection methods—i.e., interviews, observation, questionnaires, performance records, and daily journals. The results indicated an improvement in participants’ programming skills, which was detected through their performance records and final project evaluations. The participants also showed a high interest in learning programming and positive attitudes towards the experience. However, the participants’ experience also involved some challenges such as understanding abstract concepts, code navigation, and some technical issues. The study is hoped to contribute to the literature on education inclusion and to bridge the digital divide in our society.
    Type of Medium: Online Resource
    ISSN: 2071-1050
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2518383-7
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  • 5
    Online Resource
    Online Resource
    MDPI AG ; 2019
    In:  Sensors Vol. 19, No. 14 ( 2019-07-10), p. 3042-
    In: Sensors, MDPI AG, Vol. 19, No. 14 ( 2019-07-10), p. 3042-
    Abstract: Brain computer interfaces are currently considered to greatly enhance assistive technologies and improve the experiences of people with special needs in the workplace. The proposed adaptive control model for smart offices provides a complete prototype that senses an environment’s temperature and lighting and responds to users’ feelings in terms of their comfort and engagement levels. The model comprises the following components: (a) sensors to sense the environment, including temperature and brightness sensors, and a headset that collects electroencephalogram (EEG) signals, which represent workers’ comfort levels; (b) an application that analyzes workers’ feelings regarding their willingness to adjust to a space based on an analysis of collected data and that determines workers’ attention levels and, thus, engagement; and (c) actuators to adjust the temperature and/or lighting. This research implemented independent component analysis to remove eye movement artifacts from the EEG signals and used an engagement index to calculate engagement levels. This research is expected to add value to research on smart city infrastructures and on assistive technologies to increase productivity in smart offices.
    Type of Medium: Online Resource
    ISSN: 1424-8220
    Language: English
    Publisher: MDPI AG
    Publication Date: 2019
    detail.hit.zdb_id: 2052857-7
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  • 6
    Online Resource
    Online Resource
    JMIR Publications Inc. ; 2020
    In:  Journal of Medical Internet Research Vol. 22, No. 12 ( 2020-12-8), p. e22609-
    In: Journal of Medical Internet Research, JMIR Publications Inc., Vol. 22, No. 12 ( 2020-12-8), p. e22609-
    Abstract: The massive scale of social media platforms requires an automatic solution for detecting hate speech. These automatic solutions will help reduce the need for manual analysis of content. Most previous literature has cast the hate speech detection problem as a supervised text classification task using classical machine learning methods or, more recently, deep learning methods. However, work investigating this problem in Arabic cyberspace is still limited compared to the published work on English text. Objective This study aims to identify hate speech related to the COVID-19 pandemic posted by Twitter users in the Arab region and to discover the main issues discussed in tweets containing hate speech. Methods We used the ArCOV-19 dataset, an ongoing collection of Arabic tweets related to COVID-19, starting from January 27, 2020. Tweets were analyzed for hate speech using a pretrained convolutional neural network (CNN) model; each tweet was given a score between 0 and 1, with 1 being the most hateful text. We also used nonnegative matrix factorization to discover the main issues and topics discussed in hate tweets. Results The analysis of hate speech in Twitter data in the Arab region identified that the number of non–hate tweets greatly exceeded the number of hate tweets, where the percentage of hate tweets among COVID-19 related tweets was 3.2% (11,743/547,554). The analysis also revealed that the majority of hate tweets (8385/11,743, 71.4%) contained a low level of hate based on the score provided by the CNN. This study identified Saudi Arabia as the Arab country from which the most COVID-19 hate tweets originated during the pandemic. Furthermore, we showed that the largest number of hate tweets appeared during the time period of March 1-30, 2020, representing 51.9% of all hate tweets (6095/11,743). Contrary to what was anticipated, in the Arab region, it was found that the spread of COVID-19–related hate speech on Twitter was weakly related with the dissemination of the pandemic based on the Pearson correlation coefficient (r=0.1982, P=.50). The study also identified the commonly discussed topics in hate tweets during the pandemic. Analysis of the 7 extracted topics showed that 6 of the 7 identified topics were related to hate speech against China and Iran. Arab users also discussed topics related to political conflicts in the Arab region during the COVID-19 pandemic. Conclusions The COVID-19 pandemic poses serious public health challenges to nations worldwide. During the COVID-19 pandemic, frequent use of social media can contribute to the spread of hate speech. Hate speech on the web can have a negative impact on society, and hate speech may have a direct correlation with real hate crimes, which increases the threat associated with being targeted by hate speech and abusive language. This study is the first to analyze hate speech in the context of Arabic COVID-19–related tweets in the Arab region.
    Type of Medium: Online Resource
    ISSN: 1438-8871
    Language: English
    Publisher: JMIR Publications Inc.
    Publication Date: 2020
    detail.hit.zdb_id: 2028830-X
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  • 7
    Online Resource
    Online Resource
    MDPI AG ; 2022
    In:  Applied Sciences Vol. 12, No. 24 ( 2022-12-15), p. 12922-
    In: Applied Sciences, MDPI AG, Vol. 12, No. 24 ( 2022-12-15), p. 12922-
    Abstract: Breast cancer is one of the most common types of cancer among women. Accurate diagnosis at an early stage can reduce the mortality associated with this disease. Governments and health organizations stress the importance of early detection of breast cancer as it is related to an increase in the number of available treatment options and increased survival. Early detection gives patients the best chance of receiving effective treatment. Different types of images and imaging modalities are used in the detection and diagnosis of breast cancer. One of the imaging types is “infrared thermal” breast imaging, where a screening instrument is used to measure the temperature distribution of breast tissue. Although it has not been used often, compared to mammograms, it showed promising results when used for early detection. It also has many advantages as it is non-invasive, safe, painless, and inexpensive. The literature has indicated that the use of thermal images with deep neural networks improves the accuracy of early diagnosis of breast malformation. Therefore, in this paper, we aim to investigate to what extent convolutional neural networks (CNNs) with attention mechanisms (AMs) can provide satisfactory detection results in thermal breast cancer images. We present a model for breast cancer detection based on deep neural networks with AMs using thermal images from the Database for Research Mastology with Infrared Image (DMR-IR). The model will be evaluated in terms of accuracy, sensitivity and specificity, and will be compared against state-of-the-art breast cancer detection methods. The AMs with the CNN model achieved encouraging test accuracy rates of 99.46%, 99.37%, and 99.30% on the breast thermal dataset. The test accuracy of CNNs without AMs was 92.32%, whereas CNNs with AMs achieved an improvement in accuracy of 7%. Moreover, the proposed models outperformed previous models that were reviewed in the literature.
    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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  • 8
    In: Applied Sciences, MDPI AG, Vol. 10, No. 21 ( 2020-10-26), p. 7528-
    Abstract: The Saudi government pays great attention to the usability and accessibility issues of e-government systems. E-government educational systems, such as Noor, Faris, and iEN systems, are some of the most rapidly developing e-government systems. In this study, we used a mixed-methods approach (usability testing and automated tools evaluation) to investigate the degree of difficulty faced by teachers with visual impairment while accessing such systems. The usability testing was done on four visually impaired teachers. In addition, four automated tools, namely, AChecker, HTML_CodeSniffer, SortSite, and Total Validator, were utilized in this study. The results showed that all three systems failed to support screen readers effectively as it was the main issue reported by the participants. On the other hand, the automated evaluation tools helped with identifying the most prominent accessibility issues of these systems. The perceivable principle was the principle most violated by the three systems, followed by operable, and then robust. The errors corresponding to the perceivable principle alone represented around 73% of the total errors. Moreover, further analysis revealed that most of the detected errors violated even the lowest level of accessibility conformance, which reflected the failure of these systems to pass the accessibility evaluation.
    Type of Medium: Online Resource
    ISSN: 2076-3417
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2704225-X
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  • 9
    In: Applied Sciences, MDPI AG, Vol. 11, No. 2 ( 2021-01-15), p. 796-
    Abstract: Dataset size is considered a major concern in the medical domain, where lack of data is a common occurrence. This study aims to investigate the impact of dataset size on the overall performance of supervised classification models. We examined the performance of six widely-used models in the medical field, including support vector machine (SVM), neural networks (NN), C4.5 decision tree (DT), random forest (RF), adaboost (AB), and naïve Bayes (NB) on eighteen small medical UCI datasets. We further implemented three dataset size reduction scenarios on two large datasets and analyze the performance of the models when trained on each resulting dataset with respect to accuracy, precision, recall, f-score, specificity, and area under the ROC curve (AUC). Our results indicated that the overall performance of classifiers depend on how much a dataset represents the original distribution rather than its size. Moreover, we found that the most robust model for limited medical data is AB and NB, followed by SVM, and then RF and NN, while the least robust model is DT. Furthermore, an interesting observation is that a robust machine learning model to limited dataset does not necessary imply that it provides the best performance compared to other models.
    Type of Medium: Online Resource
    ISSN: 2076-3417
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2704225-X
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  • 10
    Online Resource
    Online Resource
    Society for Science and Nature ; 2019
    In:  Bioscience Biotechnology Research Communications Vol. 12, No. 2 ( 2019-06-25), p. 333-337
    In: Bioscience Biotechnology Research Communications, Society for Science and Nature, Vol. 12, No. 2 ( 2019-06-25), p. 333-337
    Type of Medium: Online Resource
    ISSN: 0974-6455 , 2321-4007
    URL: Issue
    Language: Unknown
    Publisher: Society for Science and Nature
    Publication Date: 2019
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