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Many source-term estimation algorithms for atmospheric releases assume the measured concentration data are influenced only by the releases of interest. However, there are situations where identifying a short-term release from an unknown location in the presence of long-term releases from a different location is of interest. One such example is determining if part or all of a typical magnitude concentration of a radioactive isotope in a sampler came from a nuclear explosion, such as the explosion announced by DPRK in 2013, while medical isotope facilities and nuclear power plants were also operating in the region. An estimation algorithm has been developed for the case where a short-duration release is confounded by a long-term nuisance signal associated with an additional release location. The technique is demonstrated using synthetic release data for a hypothetical medical isotope production facility and a hypothetical puff release from a different location. The algorithm successfully determines the location (within 30 km) and time-varying release rate (within a factor of 2) for the medical isotope production facility and the location (within 60 km), time (within 6 h), and release magnitude (within a factor of 4) of the puff release.
This article was published in the following journal.
Name: Journal of environmental radioactivity
In resting-state fMRI, dynamic functional connectivity (DFC) measures are used to characterize temporal changes in the brain's intrinsic functional connectivity. A widely used approach for DFC estimat...
Accurate estimation of heart rate (HR) using reflectance-type photoplethysmographic (PPG) signals during intensive physical exercise is challenging because of very low signal-to-noise ratio (SNR) and ...
Task performance is determined not only by the amount of task-relevant signal present in our brains, but also by the presence of noise, which can arise from multiple sources. Internal noise, or "trial...
Partial directed coherence (PDC) computed from multivariate autoregressive (MVAR) model coefficient is increasingly being used to study directed functional connectivity between brain regions in the fr...
Open research on fetal heart rate (FHR) estimation is relatively rare, and evidence for the utility of metrics derived from Doppler ultrasound devices has historically remained hidden in the proprieta...
The objective is to describe and quantify levels of platelet reactivity in three different cohorts of patients taking thienopyridine: patients who report nuisance bleeding, patients who re...
The PROPhecy study aims to detect the presence of atrial fibrillation/flutter in patients who have suffered an embolic stroke of undetermined source (ESUS) using 30 day cardiac monitoring....
Drug resistant epilepsy is best managed by surgery. The goal of presurgical evalution is to correctly identify the epileptogenic zone, defined by the extent of cortical tissue that needs t...
This study evaluates to what extend electrical source imaging (ESI) provides nonredundant information in the evaluation of epilepsy surgery candidates. Epilepsy surgery normally requires a...
A true estimation of gestational age (GA) plays animportant role in quality of maternity care such asassessment of fetal growth and to schedule the labordate. Any inaccurate estimation may...
The presence of bacteria, viruses, and fungi in food and food products. This term is not restricted to pathogenic organisms: the presence of various non-pathogenic bacteria and fungi in cheeses and wines, for example, is included in this concept.
The presence of DNA from a source foreign to the sample being analysed.
The presence of bacteria, viruses, and fungi in the air. This term is not restricted to pathogenic organisms.
Protein sorting signals that target proteins to PEROXISOMES.
A genus of colorless, filamentous bacteria in the family THIOTRICHACEAE whose cells contain inclusions of sulfur granules. When found in decaying seaweed beds and polluted water, its presence signals environmental degradation.