Zobrazeno 1 - 10
of 942
pro vyhledávání: '"Bandstra A"'
Autor:
Vavrek, Jayson R., Lee, Jaewon, Salathe, Marco, Bandstra, Mark S., Hellfeld, Daniel, Quiter, Brian J., Joshi, Tenzing H. Y.
In this third part of a multi-paper series, we present quantitative image reconstruction results from aerial measurements of eight different surrogate distributed gamma-ray sources on flat terrain. We show that our quantitative imaging methods can ac
Externí odkaz:
http://arxiv.org/abs/2412.02926
Autor:
Jaewon Lee, Tenzing H. Joshi, Mark S. Bandstra, Donald L. Gunter, Brian J. Quiter, Reynold J. Cooper, Kai Vetter
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-17 (2024)
Abstract We propose a complete framework for Bayesian image reconstruction and uncertainty quantification based on a Gaussian process prior (GPP) to overcome limitations of maximum likelihood expectation maximization (ML-EM) image reconstruction algo
Externí odkaz:
https://doaj.org/article/ad1f81d793a4486886f05fcb26f9d362
Autor:
Cooper, R. J., Abgrall, N., Aversano, G., Bandstra, M. S., Hellfeld, D., Joshi, T. H., Negut, V., Quiter, B. J., Rofors, E., Salathe, M., Vetter, K., Beckman, P., Catlett, C., Ferrier, N., Kim, Y., Sankaran, R., Shahkarami, S., Amitkumar, S., Ayton, E., Kim, J., Volkova, S.
The detection, identification, and localization of illicit radiological and nuclear material continue to be key components of nuclear non-proliferation and nuclear security efforts around the world. Networks of radiation detectors deployed at strateg
Externí odkaz:
http://arxiv.org/abs/2307.13811
Autor:
Bandstra, M. S., Abgrall, N., Cooper, R. J., Hellfeld, D., Joshi, T. H. Y., Negut, V., Quiter, B. J., Salathe, M., Sankaran, R., Kim, Y., Shahkarami, S.
Static gamma-ray detector systems that are deployed outdoors for radiological monitoring purposes experience time- and spatially-varying natural backgrounds and encounters with man-made nuisance sources. In order to be sensitive to illicit sources, s
Externí odkaz:
http://arxiv.org/abs/2304.01336
Autor:
Bandstra, Mark S., Hellfeld, Daniel, Lee, Jaewon, Quiter, Brian J., Salathe, Marco, Vavrek, Jayson R., Joshi, Tenzing H. Y.
The ability to formulate maps of minimum detectable activities (MDAs) that describe the sensitivity of an ad hoc measurement that used one or more freely moving radiation detector systems would be significantly beneficial for the conduct and understa
Externí odkaz:
http://arxiv.org/abs/2208.03321
Autor:
Vavrek, Jayson R., Hines, C. Corey, Bandstra, Mark S., Hellfeld, Daniel, Heine, Maddison A., Heiden, Zachariah M., Mann, Nick R., Quiter, Brian J., Joshi, Tenzing H. Y.
We demonstrate a method for using arrays of point sources that emulate -- when measured from a standoff of at least several meters -- distributed gamma-ray sources, and present results using this method from outdoor aerial measurements of several pla
Externí odkaz:
http://arxiv.org/abs/2208.02899
Autor:
Benedict M. Matern, Eric Spierings, Selle Bandstra, Abeer Madbouly, Stefan Schaub, Eric T. Weimer, Matthias Niemann
Publikováno v:
Frontiers in Genetics, Vol 15 (2024)
IntroductionModern histocompatibility algorithms depend on the comparison and analysis of high-resolution HLA protein sequences and structures, especially when considering epitope-based algorithms, which aim to model the interactions involved in anti
Externí odkaz:
https://doaj.org/article/837d41c767274cfdaaea7944fce232b1
Autor:
Yemane, Lahia, Powell, Carmin, Edwards, Jeffrey, Shumba, Takudzwa, Alvarez, Al’ai, Bandstra, Belinda, Brooks, Michelle, Brown-Johnson, Cati, Caceres, Wendy, Dunn, Tamara, Johnson, Carrie, Perez, Felipe D., Reece-Nguyen, Travis, Thomas, Reena P., Watkins, Amelia C., Blankenburg, Rebecca
Publikováno v:
In Academic Pediatrics January-February 2025 25(1)
Autor:
Bandstra, M. S., Quiter, B. J., Salathe, M., Bilton, K. J., Curtis, J. C., Goldenberg, S., Joshi, T. H. Y.
When searching for radiological sources in an urban area, a vehicle-borne detector system will often measure complex, varying backgrounds primarily from natural gamma-ray sources. Much work has been focused on developing spectral algorithms that reta
Externí odkaz:
http://arxiv.org/abs/2111.10463
Autor:
Hellfeld, Daniel, Bandstra, Mark S., Vavrek, Jayson R., Gunter, Donald L., Curtis, Joseph C., Salathe, Marco, Pavlovsky, Ryan, Negut, Victor, Barton, Paul J., Cates, Joshua W., Quiter, Brian J., Cooper, Reynold J., Vetter, Kai, Joshi, Tenzing H. Y.
Publikováno v:
Scientific Reports, 11, 20515 (2021)
The ability to map and estimate the activity of radiological source distributions in unknown three-dimensional environments has applications in the prevention and response to radiological accidents or threats as well as the enforcement and verificati
Externí odkaz:
http://arxiv.org/abs/2107.04080