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TemesgenHailemariamForestryEvaluationN-treeDistanceFigure2.tiff
No full textn-Tree distance sampling (NTDS), also known as k-tree sampling and point-to-tree sampling, has been promoted as a practical method for forest inventory. This simulation study evaluated the performance of three NTDS estimators, as compared with fixed plot sampling and horizontal point sampling, for estimating density and basal area in headwater riparian forests of western Oregon. Bias of at least one NTDS estimator was low for both density and basal area when at least six trees were captured at each sample point, but performance of NTDS for density estimation was poor on stem maps exhibiting a clustered pattern. We close with some comments regarding the statistical efficiency of NTDS for riparian area inventory in similar forest conditions
Developing the Oregon Spatial Data Library
Full text linkThe Oregon Spatial Data Library (http://spatialdata.oregonexplorer.info/) provides easy and convenient ways to find, access, and share geospatial data. Developed in partnership with the Oregon Department of Administrative Services (DAS), the Oregon Spatial Data Library provides access to spatial data including "framework" data for the State of Oregon. Framework datasets serve as "base data" for a variety of GIS applications that support important research, business, and public services. Administrative boundaries, transportation, land use, ownership, water, hazards, and wetlands are examples of framework data.Keywords: GIS, spatial data, data libraries, mapsKeywords: GIS, spatial data, data libraries, map
An update calculus for expressing type-safe program updates
Full text linkMany software maintenance problems are caused by using text editors to change programs. A more systematic and reliable way of performing program updates is to express changes with an update language. In particular, updates should preserve the syntax- and type-correctness of the transformed object programs. We describe an update calculus that can be used to update lambda-calculus programs. We develop a type system for the update language that infers the possible type changes that can be caused by an update program. We demonstrate that type-safe update programs that fulfill certain structural constraints preserve the type-correctness of lambda terms. The update calculus can serve as a basis for higher-level update languages, such as for Haskell or Java. We briefly indicate a possible design of these update languages.Keywords: soundness of updates, type changes, lambda calculus, Update programming, type correctness, HaskellKeywords: soundness of updates, type changes, lambda calculus, Update programming, type correctness, Haskel
Economics of Cultured Clarias gariepinus in Earthen Ponds and Concrete Tanks in Ogun State, South West Nigeria
Full text linkRecent trends reveal that fish rearing has became popular in Ogun State with the influx of new entrants into fish farming due to increasing demand for fish and fish products as well as an increase in awareness of relevant technologies. The need to study yield and revenue of fish cultured in dug-out fish ponds and fish tanks has become crucial for food security and sustainability of fish enclosures for fish production. The study was aimed at identify factors influencing the yield and revenue of Clarias gariepinus in two different fish enclosures (dugout and fish tanks). A three stage sampling technique was used to select 240 fish farmers located in the four Agricultural Development Programme (ADP) zones in Ogun State, Nigeria. Primary data collected through the questionnaire were analyzed by means of descriptive and multiple regressions statistics. Result show that 47.1% and 39.6% fish farmers adopted fish tanks and dug-out fish ponds respectively, while 13.3% adopted both on their farms.Keywords: Fisheries Economics, Posters and Game Demonstration Session and Reception, Special Topic
Oregon State Forester ; Vol. 5, No. 1 (January 1952)
No full textMagazine of the OSC Oregon Forestry Alumni Association.Keywords: Oregon Forest Products Laboratory 1951, OSC Fernhopper Honored, "Pat" Feted at Club Cabin, Japan, Forestry in Nippon, Adair Tract, H.R. Patterson, Graduate Program, McDonald Forest, Class Notes, Dr. Barnes, Laurence J Cummings, Glenn B. Parsons, Biloxi, Mississippi, Japanese Foresters, Albert Arnst, Aerial Photo Shortcourse, U. of O. Journalism Semina
Identifying insects and other arthropods in Oregon
Full text linkPublished June 2009. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalogKeywords: identification, insects, arthropods, pest
DavisCurtissCEOASApplicationHyperspectralImager.pdf
No full textAs a demonstrator for technologies for the next generation of ocean color sensors,
the Hyperspectral Imager for the Coastal Ocean (HICO) provides enhanced spatial and
spectral resolution that is required to understand optically complex aquatic environments. In
this study we apply HICO, along with satellite remote sensing and in situ observations, to
studies of phytoplankton ecology in a dynamic coastal upwelling environment—Monterey
Bay, CA, USA. From a spring 2011 study, we examine HICO-detected spatial patterns in
phytoplankton optical properties along an environmental gradient defined by upwelling
flow patterns and along a temporal gradient of upwelling intensification. From a fall 2011
study, we use HICO’s enhanced spatial and spectral resolution to distinguish a small-scale
"red tide" bloom, and we examine bloom expansion and its supporting processes using
other remote sensing and in situ data. From a spectacular HICO image of the Monterey
Bay region acquired during fall of 2012, we present a suite of algorithm results for
characterization of phytoplankton, and we examine the strengths, limitations, and
distinctions of each algorithm in the context of the enhanced spatial and spectral resolution.Keywords: Upwelling, Phytoplankton, Monterey Bay, Remote sensingKeywords: Upwelling, Phytoplankton, Monterey Bay, Remote sensingKeywords: Upwelling, Phytoplankton, Monterey Bay, Remote sensingKeywords: Upwelling, Phytoplankton, Monterey Bay, Remote sensin
Plate1.jpg
No full textJoseph Reddeford Walker conducted
a party of men across the Sierra Nevada to the
Pacific coast of California in 1833. Previous
interpretations of the portion of the route
from Humboldt Sink, Nevada, to the San Joaquin
River, California, are not satisfactory. A
body of descriptions of the terrain traversed
exists in the narrative of Zenas Leonard, and
is sufficient to reconstruct the route with
more precision. Coincidence of the distributions
of specific aspects of the physical
geography of the area results in identification
of major points of passage. The distributions
of pumice, highly alkaline lakes, and Ephydrahians lead to the conclusion that Walker
passed near Mono Lake, California. The distribution
of canyons and of vegetation similarly
identifies the dividing ridge between the
Tuolumne and Merced rivers, California, as a
point of passage. Further refinement of the
route by correlation of the descriptions with
the actual terrain provides a detailed route
Interpreting Methamphetamine Levels in a High-Use Community
Full text linkIllicit drug use is a largely hidden phenomenon and population measures are notoriously problematic. Reliable and valid data for local, regional and national public health and other interventions are needed. To address this information we examined temporal trends within and across weeks in methamphetamine (MA) in a single location in order to inform a sampling plan for understanding long-term trends in MA use based on sampling raw influent to waste water treatment plants. The measured concentrations in wastewater are used to estimate the total mass of MA consumed MA rather than the number of doses due to the uncertainty surrounding methamphetamine purity, mass of MA per dose, and the number of doses used per day. Results from a region with high levels of MA use indicate that MA levels do not differ significantly between weekdays and weekends (p=0.1), consistent with a predominately regular, daily use pattern use. The potential contribution of legal sales of d- and l-MA to the mass of MA consumed within the community was estimated to range from 3-8%. Limitations and uncertainties associated with estimating the mass of MA consumption include small contributions of prescription and over-the-counter drugs that are metabolized to MA as well as measurement and sampling variability.Keywords: Temporal patterns, Epidemiology wastewater, Methamphetamine (MA)Keywords: Temporal patterns, Epidemiology wastewater, Methamphetamine (MA
SPARC-poster.pdf
No full textScholarsArchive@OSU (SA@OSU) has been the Oregon State University institutional repository since 2004. In June 2013, OSU passed an open access rights retention policy and the Library was charged with implementation.
In 2014, a cross-departmental research group at OSU found that most of the papers resulting from their NIH grant had not yet been deposited in PubMed Central (PMC). This unintentional failure occurred for two reasons. First, some, but not all, publishers deposit articles in PMC on researchers’ behalf, which led researchers to assume the articles would be automatically deposited. Second, researchers assumed that if their article had a PMID, they were compliant. They were not, because the NIH requires that articles have a PMCID. Because these deposits were essential for renewal of the grant, researchers needed help identifying all the articles that resulted from the grant and submitting them to PMC.
The Library’s solution was to flag articles deposited in the IR that included a grant number and grant agency information. A staff person checks to see if any NIH-funded article is already scheduled to be deposited in PMC on the author’s behalf. If not, the article is deposited in both SA@OSU and PMC. The Library has since enhanced an article deposit form to allow faculty to indicate NIH or Department of Energy (DOE) funding so that the Library can deposit articles or metadata to the appropriate repository (PMC or PAGES). These processes reduce researcher workload and encourage deposit in SA@OSU