Category: AI in Cybersecurity

Learning how to perform Twitter Sentiment Analysis by Euge Inzaugarat A document can not be processed in its raw format, and hence it has to be transformed into a machine-understandable representation27. Selecting the convenient representation scheme suits the application is a substantial step28. The fundamental methodologies used to represent text data as vectors are Vector Space Model (VSM) and neural network-based representation. Text components are represented by numerical vectors which may represent a character, word, paragraph, or the whole document. Frequency-based embeddings refer to word representations that are derived from the frequency of words in a corpus. These embeddings are based on the idea that the importance or significance of a word can be inferred from how frequently it occurs in the text. Unlike traditional one-hot encoding, word embeddings are dense vectors of lower dimensionality. Table of contents However, with the advancement of natural language processing and deep learning, translator tools can determine a user’s intent and the meaning of input words, sentences, and context. Our evaluation was based on four metrics, precision, recall, F1 score, and specificity. Our results indicate that Google Translate, with the proposed ensemble model, achieved the highest F1 score in all four languages. Our findings suggest that Google Translate is better at translating foreign languages into English. The proposed ensemble model is the most suitable option for sentiment analysis on these four languages, considering that different language-translator pairs may require different models for optimal performance. One of the main advantages of using these models is their high accuracy and performance in sentiment analysis tasks, especially for social media data such as Twitter. Sentiment Analysis with Python (Part 2) - Towards Data ScienceSentiment Analysis with Python (Part .Posted: Thu, 24 Jan 2019 08:00:00 GMT [source] Another potential approach involves using explicitly trained machine learning models to identify and classify these features and assign them as positive, negative, or neutral sentiments. These models can subsequently be employed to classify the sentiment conveyed within the text by incorporating slang, colloquial language, irony, or sarcasm. This facilitates a more accurate determination of the overall sentiment expressed. The experimental result reveals promising performance gains achieved by the proposed ensemble models compared to established sentiment analysis models like XLM-T and mBERT. Both proposed models, leveraging LibreTranslate and Google Translate respectively, exhibit better accuracy and precision, surpassing 84% and 80%, respectively. It’s no longer enough to just have a social presence—you have to actively track and analyze what people are saying about you. These insights were also used to coach conversations across the social support team for stronger customer service. Plus, they were critical for the broader marketing and product teams to improve the product based on what customers wanted. Grammerly used this capability to gain industry and competitive insights from their social listening data. They were able to pull specific customer feedback from the Sprout Smart Inbox to get an in-depth view of their product, brand health and competitors. Sexuality, gender and society Named entity recognition (NER) identifies and classifies named entities (words or phrases) in text data. These named entities refer to people, brands, locations, dates, quantities and other predefined categories. The demo program concludes by predicting the sentiment for a new review of, "Overall, I liked the film." The prediction is in the form of two pseudo-probabilities with values [0.3766, 0.6234]. The first value at index [0] is the pseudo-probability of class negative, and the second value at [1] is the pseudo-probability of class positive. Dealing with misspellings is one of dozens of issues that make NLP problems difficult. You can foun additiona information about ai customer service and artificial intelligence and NLP. Mental illnesses, also called mental health disorders, are highly prevalent worldwide, and have been one of the most serious public health concerns1. According to the latest statistics, millions of people worldwide suffer from one or more mental disorders1. If mental illness is detected at an early stage, it can be beneficial to overall disease progression and treatment. I created a chatbot interface in a python notebook using a model that ensembles Doc2Vec and Latent Semantic Analysis(LSA). Content analytics is an NLP-driven approach to cluster videos (e.g. youTube) into relevant topics based on the user comments. The most frequently used technique is topic modeling LDA using bag of words where as discussed above and it is actually an unsupervised learning technique that documents as bags of words. A simplified form of this is commonly taught to school-age children, in the identification of words as nouns, verbs, adjectives, ChatGPT App adverbs etc. The goal is to develop practical and domain-independent techniques in order to detect named entities with high accuracy automatically. TF-IDF weight is a statistical measure used to evaluate how important a word is to a document in a collection or corpus. The importance increases proportionally to the number of times a word appears in the document but is offset by the frequency of the word in the corpus. The model’s proficiency in addressing all ABSA sub-tasks, including the challenging ASTE, is demonstrated through its integration of extensive linguistic features. The systematic refinement strategy further enhances its ability to align ChatGPT aspects with corresponding opinions, ensuring accurate sentiment analysis. Overall, this work sets a new standard in sentiment analysis, offering potential for various applications like market analysis and automated feedback systems. Kaggle kernels here and here are particularly instructive in analyzing features such as audience and tweet length as related to sentiment. Combinations of word embedding and handcrafted features were investigated for sarcastic text categorization54. Sarcasm was identified using topic supported word embedding (LDA2Vec) and evaluated against multiple word embedding such as GloVe, Word2vec, and FastText. The CNN trained with the LDA2Vec embedding registered the highest performance, followed by the network that was trained with the GloVe embedding. Development tools and techniques The selection of a model for practical applications should consider specific needs, such as the importance of precision over recall or vice versa. The first of these datasets, referred to herein as Dataset 1 (D1), was introduced in a study by Wu et al. under the 2020a citation. The second dataset, known as Dataset 2 (D2), is the product of annotations by Xu et al. in 2020. It represents an enhanced and corrected version of an earlier dataset put forth by Peng et al. in 2020, aiming to rectify previous inaccuracies79,90,91. These models are pre-trained on large amounts of text data, including social media content, which allows them to capture the nuances and complexities of language used in social media35. Another advantage of using these models is their ability to handle different languages and dialects. The models are trained on multilingual data, which makes them suitable for analyzing sentiment in text written in various languages35,36. LibreTranslate is a free and open-source machine translation API that uses pre-trained NMT models to translate text between different languages. To accurately identify and classify entities (e.g., names of people, organizations, locations) in text, word embeddings help the model understand the context and relationships between words. Traditional methods of representing words in a way that machines can understand, such as one-hot encoding, represent each word as a sparse vector with a dimension equal to the size of the vocabulary. Here, only one element of the vector is "hot" (set to 1) to indicate the presence of that word. While simple, this approach suffers from the curse of dimensionality, lacks semantic information and doesn't capture relationships between words. GloVe is computationally efficient compared to some other methods, as it relies on global statistics and employs matrix factorization techniques to learn the word vectors. The model can be trained on large corpora without the need for extensive computational resources. GloVe is based on the idea that the global statistics of word co-occurrence across the entire corpus are crucial for capturing word semantics. It considers how frequently words co-occur with each other in the entire dataset rather than just in the local context of individual words. The individual context word embeddings are aggregated, typically by summing or averaging them. Building a Real Time Chat Application with NLP Capabilities Taking this into account, we suggested using deep learning algorithms to find YouTube comments about the Palestine-Israel War, since the findings will help Palestine and Israel find a peaceful solution to their conflict. Section "Proposed model architecture" presents the proposed method and algorithm semantic analysis nlp usage. Section "Conclusion and recommendation" concludes the paper and outlines future work. Notably, sentiment analysis algorithms trained on extensive amounts of data from the target language demonstrate enhanced proficiency in detecting and analyzing specific features in the text. Overfitting occurs when a model becomes too specialized in the training data and fails to generalize well to unseen data. To address these issues, it is recommended to increase the sample size by including more diverse and distinct samples in each class. A larger sample size helps to capture a wider range of patterns and reduces the risk of overfitting. The lexicon approach is named in the literature as an unsupervised approach because it does not require a pre-annotated dataset. It depends mainly on the mathematical manipulation of the polarity scores, which differs from the unsupervised machine learning methodology. The hybrid approaches (Semi-supervised or weakly supervised) combine both lexicon and machine learning approaches. It manipulates the problem of labelled data scarcity by using lexicons to evaluate and annotate the training set at the document or sentence level. Sometimes, a rule-based system detects the words or phrases, and uses its rules to prioritize the customer message and prompt the agent to modify their response accordingly. Sentiment analysis tools generate insights into how companies can enhance the customer experience and improve customer service. To examine the harmful impact of bias in sentimental analysis ML models, let’s analyze how bias can be embedded in language used to depict gender. The corresponding value identifies the word polarity (positive, negative, or neutral). These approaches do not use labelled datasets but require wide-coverage lexicons that include many sentiment holding words. Dictionaries are built by applying corpus-based or dictionary-based approaches6,26. The Bi-GRU-CNN model showed the highest performance with 83.20 accuracy for the BRAD dataset, as reported in Table 6. In addition, the model achived nearly 2% improved accuracy compared to the Deep CNN ArCAR System21 and almost 2% enhanced F-score, as clarified in Table 7. The GRU-CNN model registered the second-highest accuracy value, 82.74, with nearly 1.2% boosted accuracy. Binary representation is an approach used to represent text documents by vectors of a length equal to the vocabulary size. Documents are quantized by One-hot encoding to generate the encoding vectors30. The representation does not preserve word meaning or order, so similar words cannot be distinguished from entirely different worlds. If we take a closer look at the result from each fold, we can also see that the recall for the negative class is quite low around 28~30%, while the precisions for the negative class are high as 61~65%. This means the classifier is very picky and does not think many things are negative. All the text it classifies as negative is 61~65% of the time really negative. However, it also misses a lot of actual negative class, because it is so very picky. The intuition behind this precision and recall has been taken from a Medium blog post by Andreas Klintberg. The databases include PubMed, Scopus, Web of Science, DBLP computer science bibliography, IEEE Xplore, and ACM Digital Library.Combinations of word embedding and handcrafted features were investigated for sarcastic text categorization54.This pre-trained model can answer a wide variety of questions given some input.Deep learning applies a variety of architectures capable of learning features that are internally detected during the training process. IBM Watson NLU has an easy-to-use dashboard that lets you extract, classify, and customize text for sentiment analysis. You can copy the text you want to analyze in the text box, and words can be automatically color-coded for positive, negative, and neutral entities. In the dashboards, text is classified and given sentiment scores per entity and keyword. You can also easily navigate through the different emotions behind a text or categorize them based on predefined and custom criteria. Since 2019, Israel has been facing a political crisis, with five wars between Israel and Hamas since 2006. If you’d like to know more about data mining, one of the essential features of sentiment analysis, read our in-depth guide on the types and examples of data mining. We chose Meltwater as ideal for market research because of its broad coverage, monitoring of social media, news, and a wide range of online sources internationally. This coverage helps businesses understand overall market conversations and compare how their brand is doing alongside their competitors. Meltwater also provides in-depth analysis of various media, such as showing the overall tonality of any given article or mention, which gives you a holistic context of your brand or topic of interest. Talkwalker helps users access actionable social data with its comprehensive yet easy-to-use social monitoring tools.

Category: AI in Cybersecurity

A multimodal approach to cross-lingual sentiment analysis with ensemble of transformer and LLM Scientific Reports

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