منابع مشابه
GammaSense: Infrastructureless Positioning Using Background Radioactivity
We introduce the harvesting of natural background radioactivity for positioning. Using a standard Geiger-Müller counter as sensor, we fingerprint the natural levels of gamma radiation with the aim of then roughly pinpointing the position of a client in terms of interfloor, intrafloor, and indoor-versus-outdoor locations. We find that the performance of a machine-learning algorithm in detecting ...
متن کاملMultichannel statistical analysis of low-level radioactivity in the presence of background counts.
This paper presents a multichannel extension to the Poisson-based Bayesian statistical analysis of the net count rate in a sample. The derivation gives the net count rate probability density distribution in analytical form. In addition, it presents a Normal approximation that is appropriate when the number of counts is large. The new analysis can exhibit a lower false positive probability than ...
متن کاملLow background techniques for the Borexino nylon vessels
Borexino is an organic liquid scintillator underground detector for low energy solar neutrinos. The experiment has to satisfy extremely stringent low background requirements. The thin nylon spherical scintillator containment vessel has to meet cleanliness and low radioactivity levels second only, within the detector, to the scintillator itself. Overall, the background from the vessel in the fid...
متن کاملA study of background radioactivity level for Canakkale, Turkey.
This study assesses the level of background radiation for Canakkale province of northwestern Turkey. Radon concentrations in indoor air were determined using CR-39 nuclear track detectors and (222)Rn activity was found to be 167 Bq m( - 3) (equivalent to an annual effective dose of 4.2 mSv). Measurements of outdoor gamma radiation (of terrestrial and cosmic origin) in air were performed using p...
متن کاملBackground Subtraction Techniques
Background subtraction is a commonly used class of techniques for segmenting out objects of interest in a scene for applications such as surveillance. This paper surveys a representative sample of the published techiques for background subtraction, and analyses them with respect to three important attributes: foreground detection; background maintenance; and postprocessing.
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ژورنال
عنوان ژورنال: Annual Review of Nuclear and Particle Science
سال: 1995
ISSN: 0163-8998,1545-4134
DOI: 10.1146/annurev.ns.45.120195.002551