Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Anthony R. Olsen"'
Publikováno v:
Journal of Statistical Software, Vol 105, Pp 1-29 (2023)
spsurvey is an R package for design-based statistical inference, with a focus on spatial data. spsurvey provides the generalized random-tessellation stratified (GRTS) algorithm to select spatially balanced samples via the grts() function. The grts()
Externí odkaz:
https://doaj.org/article/5c71a001ee48488fb574b4d9fcfa4efa
Publikováno v:
Journal of Statistical Software, Vol 63, Iss 1, Pp 1-16 (2015)
The R package micromap is used to create linked micromaps, which display statistical summaries associated with areal units, or polygons. Linked micromaps provide a means to simultaneously summarize and display both statistical and geographic distribu
Externí odkaz:
https://doaj.org/article/d64211878377434c994d52c3fad1da62
Publikováno v:
Methods in ecology and evolution. 13(9)
The design-based and model-based approaches to frequentist statistical inference rest on fundamentally different foundations. In the design-based approach, inference relies on random sampling. In the model-based approach, inference relies on distribu
Publikováno v:
PLoS ONE, Vol 15, Iss 3, p e0229509 (2020)
Environmental data may be "large" due to number of records, number of covariates, or both. Random forests has a reputation for good predictive performance when using many covariates with nonlinear relationships, whereas spatial regression, when using
Externí odkaz:
https://doaj.org/article/c834dd5848404ca3b02d79c5d2496004
Autor:
Leanne L. Stahl, Blaine D. Snyder, Harry B. McCarty, Thomas M. Kincaid, Anthony R. Olsen, Tara R. Cohen, John C. Healey
Publikováno v:
The Science of the total environment.
Most fish consumption advisories in the United States (U.S.) are issued for mercury and polychlorinated biphenyls (PCBs), and recently per- and polyfluoroalkyl substances (PFAS) have become a contaminant group that warrants fish consumption advice. A
Publikováno v:
Environ Sci Technol
U.S. EPA conducted a national statistical survey of fish tissue contamination at 540 river sites (representing 82 954 river km) in 2008–2009, and analyzed samples for 50 persistent organic pollutants (POPs), including 21 PCB congeners, 8 PBDE conge
Publikováno v:
Environmental Monitoring and Assessment
The US Environmental Protection Agency (US EPA) initiated planning in 2007 and conducted field work in 2011 for the first National Wetland Condition Assessment (NWCA) as part of the National Aquatic Resource Surveys (NARS). It complements the US Fish
Publikováno v:
JAWRA Journal of the American Water Resources Association. 52:120-128
We developed an extensive database of landscape metrics for ~2.65 million stream segments, and their associated catchments, within the conterminous United States (U.S.): The Stream-Catchment (StreamCat) Dataset. These data are publically available (h
Publikováno v:
Environmental Toxicology and Chemistry. 35:874-881
To assess the potential exposure of aquatic ecosystems to active pharmaceutical ingredients, the authors conducted a national-scale, probability-based statistical survey of the occurrence of these compounds in surface waters of the United States. The
Publikováno v:
Freshwater science (Print). 37
Natural and human-related landscape features influence the ecology and water quality of lakes. Summarizing these features in a hydrologically meaningful way is critical to understanding and managing lake ecosystems. Such summaries are often done by d