Support Vector Machines
Early Dementia Detection Using Multiple Spontaneous Speech Prompts: The PROCESS Challenge
Tao, Fuxiang, Mirheidari, Bahman, Pahar, Madhurananda, Young, Sophie, Xiao, Yao, Elghazaly, Hend, Peters, Fritz, Illingworth, Caitlin, Braun, Dorota, O'Malley, Ronan, Bell, Simon, Blackburn, Daniel, Haider, Fasih, Luz, Saturnino, Christensen, Heidi
Second, the audio quality of the data is poor and does not represent the quality that it is possible to Dementia is associated with various cognitive impairments achieve even with current, standard consumer-based devices and typically manifests only after significant progression, like modern laptops. These factors underscore the necessity making intervention at this stage often ineffective. To address for new data sets to ensure the continued advancement and this issue, the Prediction and Recognition of Cognitive accuracy of research in this field. Decline through Spontaneous Speech (PROCESS) Signal The PROCESS Signal Processing Grand Challenge aims Processing Grand Challenge invites participants to focus on to establish a platform for contributions and discussions on early-stage dementia detection. We provide a new spontaneous early-stage dementia detection using speech signal processing speech corpus for this challenge. This corpus includes and Artificial Intelligence (AI) models. To support this, answers from three prompts designed by neurologists to better we provide a state-of-the-art corpus covering a broader range capture the cognition of speakers. Our baseline models of diagnostic classes for different subtypes of early-stage achieved an F1-score of 55.0% on the classification task and dementia, including mild cognitive impairment (MCI).
Conveying Emotions to Robots through Touch and Sound
Ren, Qiaoqiao, Proesmans, Remko, Bossuyt, Frederick, Vanfleteren, Jan, Wyffels, Francis, Belpaeme, Tony
Human emotions can be conveyed through nuanced touch gestures. However, there is a lack of understanding of how consistently emotions can be conveyed to robots through touch. This study explores the consistency of touch-based emotional expression toward a robot by integrating tactile and auditory sensory reading of affective haptic expressions. We developed a piezoresistive pressure sensor and used a microphone to mimic touch and sound channels, respectively. In a study with 28 participants, each conveyed 10 emotions to a robot using spontaneous touch gestures. Our findings reveal a statistically significant consistency in emotion expression among participants. However, some emotions obtained low intraclass correlation values. Additionally, certain emotions with similar levels of arousal or valence did not exhibit significant differences in the way they were conveyed. We subsequently constructed a multi-modal integrating touch and audio features to decode the 10 emotions. A support vector machine (SVM) model demonstrated the highest accuracy, achieving 40% for 10 classes, with "Attention" being the most accurately conveyed emotion at a balanced accuracy of 87.65%.
Utilizing Machine Learning Models to Predict Acute Kidney Injury in Septic Patients from MIMIC-III Database
Roknaldin, Aleyeh, Zhang, Zehao, Xu, Jiayuan, Alaei, Kamiar, Pishgar, Maryam
Sepsis is a severe condition that causes the body to respond incorrectly to an infection. This reaction can subsequently cause organ failure, a major one being acute kidney injury (AKI). For septic patients, approximately 50% develop AKI, with a mortality rate above 40%. Creating models that can accurately predict AKI based on specific qualities of septic patients is crucial for early detection and intervention. Using medical data from septic patients during intensive care unit (ICU) admission from the Medical Information Mart for Intensive Care 3 (MIMIC-III) database, we extracted 3301 patients with sepsis, with 73% of patients developing AKI. The data was randomly divided into a training set (n = 1980, 40%), a test set (n = 661, 10%), and a validation set (n = 660, 50%). The proposed model was logistic regression, and it was compared against five baseline models: XGBoost, K Nearest Neighbors (KNN), Support Vector Machines (SVM), Random Forest (RF), and LightGBM. Area Under the Curve (AUC), Accuracy, F1-Score, and Recall were calculated for each model. After analysis, we were able to select 23 features to include in our model, the top features being urine output, maximum bilirubin, minimum bilirubin, weight, maximum blood urea nitrogen, and minimum estimated glomerular filtration rate. The logistic regression model performed the best, achieving an AUC score of 0.887 (95% CI: [0.861-0.915]), an accuracy of 0.817, an F1 score of 0.866, a recall score of 0.827, and a Brier score of 0.13. Compared to the best existing literature in this field, our model achieved an 8.57% improvement in AUC while using 13 fewer variables, showcasing its effectiveness in determining AKI in septic patients. While the features selected for predicting AKI in septic patients are similar to previous literature, the top features that influenced our model's performance differ.
Granular Ball Twin Support Vector Machine with Universum Data
Ganaie, M. A., Ahire, Vrushank
Innovative Data Representation with Granular Balls: The GBU-TSVM model employs an innovative approach by representing data instances as granular balls rather than conventional points. This method improves the model's robustness and efficiency, especially in handling noisy and large datasets. By grouping data points into granular balls, the model achieves better computational efficiency, increased noise resistance, and enhanced interpretability, establishing a new standard in data representation. Enhanced Generalization using Universum Data: The GBU-TSVM incorporates Universum data, which includes samples outside the target classes, to significantly improve generalization capabilities. Universum data enables the classifier to perform better on benchmark datasets, demonstrating the model's ability to utilize additional knowledge for more precise predictions. Refined Learning with Modified Hinge Loss Function: The model includes an advanced hinge loss function that accounts for the radii of granular balls, leading to a more accurate error measure and learning process. This modification allows for a detailed error assessment, enhancing the model's learning efficiency and decision boundary precision. By addressing the limitations of existing TSVM models, this innovation sets a new benchmark in the field of machine learning classifiers.
Kernel-Free Universum Quadratic Surface Twin Support Vector Machines for Imbalanced Data
Moosaei, Hossein, Hladík, Milan, Mousavi, Ahmad, Gao, Zheming, Fu, Haojie
Binary classification tasks with imbalanced classes pose significant challenges in machine learning. Traditional classifiers often struggle to accurately capture the characteristics of the minority class, resulting in biased models with subpar predictive performance. In this paper, we introduce a novel approach to tackle this issue by leveraging Universum points to support the minority class within quadratic twin support vector machine models. Unlike traditional classifiers, our models utilize quadratic surfaces instead of hyperplanes for binary classification, providing greater flexibility in modeling complex decision boundaries. By incorporating Universum points, our approach enhances classification accuracy and generalization performance on imbalanced datasets. We generated four artificial datasets to demonstrate the flexibility of the proposed methods. Additionally, we validated the effectiveness of our approach through empirical evaluations on benchmark datasets, showing superior performance compared to conventional classifiers and existing methods for imbalanced classification.
BN-AuthProf: Benchmarking Machine Learning for Bangla Author Profiling on Social Media Texts
Tasnim, Raisa, Chowdhury, Mehanaz, Rahman, Md Ataur
Author profiling, the analysis of texts to uncover attributes such as gender and age of the author, has become essential with the widespread use of social media platforms. This paper focuses on author profiling in the Bangla language, aiming to extract valuable insights about anonymous authors based on their writing style on social media. The primary objective is to introduce and benchmark the performance of machine learning approaches on a newly created Bangla Author Profiling dataset, BN-AuthProf. The dataset comprises 30,131 social media posts from 300 authors, labeled by their age and gender. Authors' identities and sensitive information were anonymized to ensure privacy. Various classical machine learning and deep learning techniques were employed to evaluate the dataset. For gender classification, the best accuracy achieved was 80% using Support Vector Machine (SVM), while a Multinomial Naive Bayes (MNB) classifier achieved the best F1 score of 0.756. For age classification, MNB attained a maximum accuracy score of 91% with an F1 score of 0.905. This research highlights the effectiveness of machine learning in gender and age classification for Bangla author profiling, with practical implications spanning marketing, security, forensic linguistics, education, and criminal investigations, considering privacy and biases.
HumekaFL: Automated Detection of Neonatal Asphyxia Using Federated Learning
Zantou, Pamely, Guda, Blessed, Retta, Bereket, Inabeza, Gladys, Joe-Wong, Carlee, Gueye, Assane
Birth Apshyxia (BA) is a severe condition characterized by insufficient supply of oxygen to a newborn during the delivery. BA is one of the primary causes of neonatal death in the world. Although there has been a decline in neonatal deaths over the past two decades, the developing world, particularly sub-Saharan Africa, continues to experience the highest under-five (<5) mortality rates. While evidence-based methods are commonly used to detect BA in African healthcare settings, they can be subject to physician errors or delays in diagnosis, preventing timely interventions. Centralized Machine Learning (ML) methods demonstrated good performance in early detection of BA but require sensitive health data to leave their premises before training, which does not guarantee privacy and security. Healthcare institutions are therefore reluctant to adopt such solutions in Africa. To address this challenge, we suggest a federated learning (FL)-based software architecture, a distributed learning method that prioritizes privacy and security by design. We have developed a user-friendly and cost-effective mobile application embedding the FL pipeline for early detection of BA. Our Federated SVM model outperformed centralized SVM pipelines and Neural Networks (NN)-based methods in the existing literature
Development of Low-Cost IoT Units for Thermal Comfort Measurement and AC Energy Consumption Prediction System
Chen, Yutong, Sumiyoshi, Daisuke, Sakai, Riki, Yamamoto, Takahiro, Ueno, Takahiro, Oh, Jewon
In response to the substantial energy consumption in buildings, the Japanese government initiated the BI-Tech (Behavioral Insights X Technology) project in 2019, aimed at promoting voluntary energy-saving behaviors through the utilization of AI and IoT technologies. Our study aimed at small and medium-sized office buildings introduces a cost-effective IoT-based BI-Tech system, utilizing the Raspberry Pi 4B+ platform for real-time monitoring of indoor thermal conditions and air conditioner (AC) set-point temperature. Employing machine learning and image recognition, the system analyzes data to calculate the PMV index and predict energy consumption changes due to temperature adjustments. The integration of mobile and desktop applications conveys this information to users, encouraging energy-efficient behavior modifications. The machine learning model achieved with an R2 value of 97%, demonstrating the system's efficiency in promoting energy-saving habits among users.
Classification of Deceased Patients from Non-Deceased Patients using Random Forest and Support Vector Machine Classifiers
Saha, Dheeman, Segura, Aaron, Tiwari, Biraj
Analyzing large datasets and summarizing it into useful information is the heart of the data mining process. In healthcare, information can be converted into knowledge about patient historical patterns and possible future trends. During the COVID-19 pandemic, data mining COVID-19 patient information poses an opportunity to discover patterns that may signal that the patient is at high risk for death. COVID-19 patients die from sepsis, a complex disease process involving multiple organ systems. We extracted the variables physicians are most concerned about regarding viral septic infections. With the aim of distinguishing COVID-19 patients who survive their hospital stay and those COVID-19 who do not, the authors of this study utilize the Support Vector Machine (SVM) and the Random Forest (RF) classification techniques to classify patients according to their demographics, laboratory test results, and preexisting health conditions. After conducting a 10-fold validation procedure, we assessed the performance of the classification through a Receiver Operating Characteristic (ROC) curve, and a Confusion Matrix was used to determine the accuracy of the classifiers. We also performed a cluster analysis on the binary factors, such as if the patient had a preexisting condition and if sepsis was identified, and the numeric values from patient demographics and laboratory test results as predictors.
Material synthesis through simulations guided by machine learning: a position paper
Syed, Usman, Cunico, Federico, Khan, Uzair, Radicchi, Eros, Setti, Francesco, Speghini, Adolfo, Marone, Paolo, Semenzin, Filiberto, Cristani, Marco
In this position paper, we propose an approach for sustainable data collection in the field of optimal mix design for marble sludge reuse. Marble sludge, a calcium-rich residual from stone-cutting processes, can be repurposed by mixing it with various ingredients. However, determining the optimal mix design is challenging due to the variability in sludge composition and the costly, time-consuming nature of experimental data collection. Also, we investigate the possibility of using machine learning models using meta-learning as an optimization tool to estimate the correct quantity of stone-cutting sludge to be used in aggregates to obtain a mix design with specific mechanical properties that can be used successfully in the building industry. Our approach offers two key advantages: (i) through simulations, a large dataset can be generated, saving time and money during the data collection phase, and (ii) Utilizing machine learning models, with performance enhancement through hyper-parameter optimization via meta-learning, to estimate optimal mix designs reducing the need for extensive manual experimentation, lowering costs, minimizing environmental impact, and accelerating the processing of quarry sludge. Our idea promises to streamline the marble sludge reuse process by leveraging collective data and advanced machine learning, promoting sustainability and efficiency in the stonecutting sector.