anomalies

This tutorial focus on building a web application with MLflow, Sagemaker and StreamlitPhoto by Michael Fenton on UnsplashThis article is in continuation of the story How to deploy your ML model using DagsHub+MLflow+AWS Lambda. In the previous story, I showed how to train and deploy a model to detect irregular heart rhythms from ECG signals. The benchmark dataset was the ECG5000 dataset, which contains 5000 heartbeats randomly selected from a patient that had heart failure. It’s been frequently used in research papers and…

Data science is about finding patterns and extracting meaningful insights from their analysis. As any practitioner knows, however, data loves throwing us the occasional curveball: a weird spike, an unexpected dip, or (gasp!) an oddly shaped cluster.This week, we turn our attention to those jarring moments when things (and our graphs) turn out to be less smooth than we’d hoped. Our selection of highlights cover different approaches for tackling irregularity and coming to terms with the unpredictable.Finding outliers, the…

A multinational research team led by UCL has developed an artificial intelligence (AI) programme that can identify minute brain anomalies that lead to epileptic seizures. The algorithm used in the Multicentre Epilepsy Lesion Detection project (MELD), reports the locations of abnormalities in cases of drug-resistant focal cortical dysplasia (FCD), a major cause of epilepsy, was developed using more than 1,000 patient MRI scans from 22 international epilepsy centres.Brain regions known as FCDs have evolved improperly and…

Photo by Rupert Britton on UnsplashIdentify issues in telemetry data proactively using a simple approachAnomaly detection plays a key role in many domains, especially in finance and health care. Identifying anomalies in financial transactions proactively helps in avoiding huge losses. Similarly, in health care, it helps in identifying health risks early in the diagnosis. This blog focuses on a simple form of Anomaly Detection (AD) using Principal Component Analysis (PCA). We will apply the algorithm to a well-known area —…

False-color view of total ozone over the Arctic pole during the beginning of 2020. The purple and blue colors are where there is the least ozone, and the yellows and reds are where there is more ozone. Credit: NASA Ozone WatchMany people are aware of the hole in the ozone layer over Antarctica, but what is less widely known is that the protective ozone in the stratosphere over the Arctic is periodically destroyed as well, thinning the ozone layer there. This last happened in the spring of 2020, and before that, in the…

The ozone layer in the stratosphere protects life on Earth from harmful UV radiation - but also has a strong influence on the weather. Credit: NASA Many people are familiar with the hole in the ozone layer over Antarctica, but what is less well known is that occasionally, the protective ozone in the stratosphere over the Arctic is destroyed as well, thinning the ozone layer there. This last happened in the spring months of…

Eyeing a major technological leap, the National Stock Exchange (NSE) is exploring an "unsupervised machine learning model" to plug anomalies in algorithmic orders. The machine learning algorithms or algo monitor trade results and detect patterns that determine if stock prices go up or down.In its annual report for 2021-22, the exchange said that it has developed well-curated market surveillance mechanisms backed by robust technology architecture over the years. The bourse's surveillance systems identify malpractices and…

Our planet's protective shell isn't quite what it used to be. Over the past two centuries its magnetic strength has taken a nosedive, and nobody has the foggiest idea why. At the same time, a concerning soft-spot in the field called the South Atlantic Anomaly has blistered over the Atlantic ocean, and has already proven problematic for delicate circuitry on orbital satellites.  Both of these troubling observations fuel concerns that we might be seeing signs of an imminent reconfiguration that would turn the compass…