recall f1-score support 0 0
Analysis of human visual field information using machine learning methods and assessment of their accuracy
Medvedeva, A. I., Bakutkin, V. V.
Subject of research: is the study of methods for analyzing perimetric images for the diagnosis and control of glaucoma diseases. Objects of research: is a dataset collected on the ophthalmological perimeter with the results of various patient pathologies, since the ophthalmological community is acutely aware of the issue of disease control and import substitution. [5]. Purpose of research: is to consider various machine learning methods that can classify glaucoma. This is possible thanks to the classifier built after labeling the dataset. It is able to determine from the image whether the visual fields depicted on it are the results of the impact of glaucoma on the eyes or other visual diseases. Earlier in the work [3], a dataset was described that was collected on the Tomey perimeter. The average age of the examined patients ranged from 30 to 85 years. Methods of research: machine learning methods for classifying image results (stochastic gradient descent, logistic regression, random forest, naive Bayes). Main results of research: the result of the study is computer modeling that can determine from the image whether the result is glaucoma or another disease (binary classification).
- Asia > Russia (0.15)
- Europe > Russia > Volga Federal District > Saratov Oblast > Saratov (0.05)
- Europe > Russia > Central Federal District > Moscow Oblast > Moscow (0.05)
- Asia > Macao (0.05)
Machine Learning for Public Good: Predicting Urban Crime Patterns to Enhance Community Safety
In recent years, urban safety has become a paramount concern for city planners and law enforcement agencies. Accurate prediction of likely crime occurrences can significantly enhance preventive measures and resource allocation. However, many law enforcement departments lack the tools to analyze and apply advanced AI and ML techniques that can support city planners, watch programs, and safety leaders to take proactive steps towards overall community safety. This paper explores the effectiveness of ML techniques to predict spatial and temporal patterns of crimes in urban areas. Leveraging police dispatch call data from San Jose, CA, the research goal is to achieve a high degree of accuracy in categorizing calls into priority levels particularly for more dangerous situations that require an immediate law enforcement response. This categorization is informed by the time, place, and nature of the call. The research steps include data extraction, preprocessing, feature engineering, exploratory data analysis, implementation, optimization and tuning of different supervised machine learning models and neural networks. The accuracy and precision are examined for different models and features at varying granularity of crime categories and location precision. The results demonstrate that when compared to a variety of other models, Random Forest classification models are most effective in identifying dangerous situations and their corresponding priority levels with high accuracy (Accuracy = 85%, AUC = 0.92) at a local level while ensuring a minimum amount of false negatives. While further research and data gathering is needed to include other social and economic factors, these results provide valuable insights for law enforcement agencies to optimize resources, develop proactive deployment approaches, and adjust response patterns to enhance overall public safety outcomes in an unbiased way.
- North America > United States > California > Santa Clara County > San Jose (0.25)
- North America > United States > New York (0.05)
- North America > United States > Illinois > Cook County > Chicago (0.05)
- (3 more...)
Early Warning Signals of Social Instabilities in Twitter Data
Shamsaddini, Vahid, Kirveslahti, Henry, Reinauer, Raphael, de Oliveira, Wallyson Lemes, Caorsi, Matteo, Voutaz, Etienne
The problem concerns the individuation of early warning signals for the outburst of revolutions, riots, or wars. It has been proven in numerous studies - Lim, 2011, 2012; Lotan et al., 2011; Tufekci & Wilson, 2012; Voutaz & Blarer, 2022 - that it is possible to extract early warning signals of contemporary activism from social media. Examples of such events are the Arab Spring of the Tahrir square in 2011 and farmers' protests in India and Iraq of the years 2019 and 2020. Social media such as https://twitter.com/?lang=en are becoming more and more present in everydays life and are often used by people as a mean to express their thoughts or concerns. Hence, tweets likely contain valuable information to identify early warning signals for disruptive events. In this project, we will try to create and study novel techniques to identify early warning signals on tweet data.
- Asia > Middle East > Iraq (0.24)
- Asia > India (0.24)
- North America > United States (0.14)
- (4 more...)
- Government (0.47)
- Information Technology > Services (0.40)
Scalable Classifier-Agnostic Channel Selection for Multivariate Time Series Classification
Dhariyal, Bhaskar, Nguyen, Thach Le, Ifrim, Georgiana
Accuracy is a key focus of current work in time series classification. However, speed and data reduction in many applications is equally important, especially when the data scale and storage requirements increase rapidly. Current MTSC algorithms need hundreds of compute hours to complete training and prediction. This is due to the nature of multivariate time series data, which grows with the number of time series, their length and the number of channels. In many applications, not all the channels are useful for the classification task; hence we require methods that can efficiently select useful channels and thus save computational resources. We propose and evaluate two methods for channel selection. Our techniques work by representing each class by a prototype time series and performing channel selection based on the prototype distance between classes. The main hypothesis is that useful channels enable better separation between classes; hence, channels with the higher distance between class prototypes are more useful. On the UEA Multivariate Time Series Classification (MTSC) benchmark, we show that these techniques achieve significant data reduction and classifier speedup for similar levels of classification accuracy. Channel selection is applied as a pre-processing step before training state-of-the-art MTSC algorithms and saves about 70\% of computation time and data storage, with preserved accuracy. Furthermore, our methods enable even efficient classifiers, such as ROCKET, to achieve better accuracy than using no channel selection or forward channel selection. To further study the impact of our techniques, we present experiments on classifying synthetic multivariate time series datasets with more than 100 channels, as well as a real-world case study on a dataset with 50 channels. Our channel selection methods lead to significant data reduction with preserved or improved accuracy.
Survey of Machine Learning Techniques To Predict Heartbeat Arrhythmias
Many works in biomedical computer science research use machine learning techniques to give accurate results. However, these techniques may not be feasible for real-time analysis of data pulled from live hospital feeds. In this project, different machine learning techniques are compared from various sources to find one that provides not only high accuracy but also low latency and memory overhead to be used in real-world health care systems.
- North America > United States > Massachusetts (0.04)
- North America > United States > Kentucky > Fayette County > Lexington (0.04)
- Asia > Middle East > Israel (0.04)