191 research outputs found
Plate-scale imaging of eastern US reveals ancient and ongoing continental deformation
No full text<p>This is the tomography dataset from "Plate-scale imaging of eastern US reveals ancient and ongoing continental deformation", submitted to <em>Geophysical Research Letters</em> in 2024-02. A Matlab file is included, which can also be opened using Python with Scipy loadmat function. The file contains a structure with the following fields: </p>
<p>lon, lat, z, vs: Velocity and positions, each with shape nlon x nlat x nz. </p>
<p>z_moho, z_sediment, z_lab_1150: depths to each of these layers. The LAB is to the 1150 C isotherm. Shapes are nlon x nlat. </p>
<p>We also include surface wave datasets produced from ambient noise tomography (Lynner and Porrit, 2019), and earthquake Helmholtz tomography (Lynner et al., 2019). See files ENAM_RAYLEIGH_ANT_LYN2017.zip and ENAM_RAYLEIGH_LYNNER_EQ_HELM.zip. </p>
<p>Lynner, C., Guajardo, A., Eilon, Z., & Janiszewski, H. A. (2019). Surface wave tomography across the Eastern North American Margin from amphibious data<em> </em>[Dataset]. <em>2019</em>, T21F-0376.</p>
<p>Lynner, C., & Porritt, R. W. (2017). Crustal structure across the eastern North American margin from ambient noise tomography [Dataset]. <em>Geophysical Research Letters</em>, <em>44</em>(13), 6651–6657. https://doi.org/10.1002/2017GL073500</p>
MANOVA modelling of a chiropractic longitudinal study using multiple imputation
No full textThe purpose of this report is to present the detailed statistical analysis of a randomised, placebo-controlled trial comparing two different treatment modalities to an intervention of no known benefit for people with acute or subacute thoracic spine pain.
The therapy arms consist of Spinal Manipulative Therapy (SMT) and Graston Technique (GT) and the placebo is a non-functional ultrasound. A placebo group was utilised because at present there are no proven treatments for non-specific thoracic pain. This trial is registered with the Australia and New Zealand Clinical Trials Registry. Ethics approval has been granted by Murdoch University Human Research and Ethics Committee, number 2007/274.
The aim of this three arm trial was to test the efficacy of SMT and GT as independent modalities compared to detuned ultrasound for the outcomes of pain and disability. The latter were measured using the Visual Analogue Scale (VAS) and a modified Oswestry Back Pain Disability Index. The study was conducted at the Murdoch University Chiropractic student clinic in Perth, Australia, and the protocol published in Crothers et al (2008).
In this report, Section 2 provides an initial exploratory analysis of the data, Section 3 outlines the statistical models used in the final analysis, Section 4 defines these models in mathematical terms, Section 5 discusses the management of missing values via multiple imputation and Section 6 presents the results of the statistical modelling and hypothesis tests. The clinical study will be published in full elsewhere
Geologic map of Wisconsin 1855
No full textShows rail roads, common roads, canals, state capital, county towns, townships, villages, post offices, etc.
"Based on the geographical map of J.H. Colton & Co. New York, 1855."
Prime meridians: Greenwich and Washington.
Includes public land survey grid and decorative border.
Signed by author: "Rev. W. C. Whitford with respects of I. A. Lapham."
"Entered according to Act of Congress in the year 1855 by J.H. Colton & Co. in the clerks office of the Dist. Court of the U.S. for the Southn. Dist. of New York."
"Entered according to Act of Congress in the year 1855 by I.A. Lapham in the clerks office of the Dist. Court of the U.S. for the District of Wisconsin."Color1:1,710,7
What's the gang wearing?: An exploratory and descriptive analysis of police gang uniforms
No full textPrevious studies on police uniforms have found uniform color and style continue to evolve as do the dynamics around police uniforms and citizen impression. Given no research has been done specifically on police gang unit uniforms, this study was exploratory and aimed to determine if there was a visual standard regarding the operational appearance of police gang unit uniforms in Canada and the United States. Using targeted and purposive sampling the researcher collected 64 samples of digital images containing police gang unit officers in uniform for content analysis. The analyzed data yielded quantitative statistics that were applied to the primary research question. These statistics found that police gang unit officers in Canada and the United States are most likely to deploy in a unit-specific police uniform, that is black in color, visually identifies as a gang unit (by patch or crest), and be wearing external body armor that is black in color. The researcher suggests the study’s findings be applied to further research to determine the potential implications police gang crime unit uniforms may have on citizen impression. All of which contributes to the ongoing debates around the militarization of the police.social constructionpolice gang unitgangsuniformpolice uniformuniform colormilitarizationArticle based on honours thesis by Colton Lazarowic
Crustal structure across the eastern North American margin from ambient noise tomography
No full textPassive tectonic margins, like the eastern North American margin (ENAM), represent the meeting of oceanic and continental material where no active deformation is occurring. The recent ENAM Community Seismic Experiment provides an opportunity to examine the crustal structure across the ENAM owing to the simultaneous deployment of offshore and onshore seismic instrumentation. Using Rayleigh wave phase and group velocities derived from ambient noise data, we invert for shear velocity across the ENAM. We observe a region of transitional crustal thicknesses that connects the oceanic and continental crusts. Associated with the transitional crust is a localized positive gravitational anomaly. Farther east, the East Coast magnetic anomaly (ECMA) is located at the intersection of the transitional and oceanic crusts. We propose that underplating of dense magmatic material along the bottom of the transitional crust is responsible for the gravitational anomaly and that the ECMA demarks the location of initial oceanic crustal formation.6 month embargo; published online: 3 July 2017This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]
Colton Formation (Eocene: Fluviatile) and Associated Lacustrine Beds, Gunnison Plateau, Central Utah
No full textAuthor Institution: Department of Geology, The Ohio State University, Columbus, Ohio 43210The Colton Formation consists mostly of fluvial (floodplain and channel) deposits that are less resistant and more highly colored than the adjacent lacustrine beds of the Flagstaff and Green River Formations. The contrast between the fluviatile and lacustrine strata is indicated by several lithic and faunal characteristics that occur in a short stratigraphic interval, and that permit precise and regionally persistent recognition of the limits of the Colton Formation. The Colton is distinguished by: 1) red, yellow, or brown, fine- to medium-grained, micaceous, feldspathic subangular sandstones that are crossbedded, thick-bedded, laterally non-persistent, and typically lens-shaped in cross-section; 2) red, green, or purple, somewhat silty or sandy mudrocks and shales that are poorly fossiliferous and poorly bedded; 3) limestone beds, locally of pastel colors, that are generally less than 1 foot thick, non-persistent, tough, platy and poorly fossiliferous; 4) far fewer fossil snails and clams than the regionally continuous carbonate units of the middle and upper Flagstaff Formation.
In contrast, lacustrine beds that bound the Colton Formation are characterized by the following features; 1) pale grey, fine-grained, subrounded sandstones, without crossbedding, that are rather thin and widespread (Flagstaff only); 2) yellow-brown or gray, thin-bedded, tough and platy limy shales that are fossiliferous and interbedded with limestone and dolomite units; 3) limestones and dolomites of several petrographic types that are two feet thick or more, and laterally persistent.
When distinguished by the sum of these characteristics, the Colton consists in the central Gunnison Plateau of a northward-thinning wedge. From a thickness of 800 feet at South Maple Canyon, it thins to less that 550 feet at Wales Canyon, north of which it has been removed by erosion. The formation becomes much more clastic toward the north in the area studied
Sub‐slab anisotropy beneath the Sumatra and circum‐Pacific subduction zones from source‐side shear wave splitting observations
No full textTesting models of sub‐slab anisotropy using a global compilation of source‐side shear wave splitting data
No full text- …
