126,287 research outputs found
Three-Dimensional Models of Experimentally-Produced Lithic Artifacts Created using Expedient and Refined Photogrammetry Protocols
No full textThe data are divided into four ZIP files based on whether they contain core or flake models, and whether the models were created using an expedient or refined photogrammetric setup and protocol. Each of these .ZIP files contains the relevant 3D models in OBJ format. There are three files associated with each model (OBJ, MTL, and JPG texture). The files are named based on object ID, and the setup used to create them (i.e. expedient or refined). All models were processed and scaled in Agisoft PhotoScan Professional Edition. Geomagic Design X was used to center and align models around the origin.The data set consists of three-dimensional (3D) models of experimentally produced lithic artifacts created using both expedient and refined photogrammetric setups and processing protocols. Source images for all models were captured using a 12.1 megapixel Canon PowerShot SX260 HS compact digital camera. In our expedient protocol, objects were placed on a wire stand. The photographer moved around the object, and captured photos using Auto mode. In our refined protocol, objects were placed on a rotating turntable under controlled lighting conditions. The camera was placed on a tripod. Shutter speed, f-stop, and ISO were set manually. This refined protocol is described in Porter, S. T., Roussel, M., & Soressi, M. (2016). A Simple Photogrammetry Rig for the Reliable Creation of 3D Artifact Models in the Field Lithic Examples from the Early Upper Paleolithic Sequence of Les Cottés (France). Advances in Archaeological Practice, 4(1), 71-86. The associated paper discusses the relative fidelity of the models produced using these different workflows. Models may also be viewed online (in browser) at: https://sketchfab.com/unlarchaeology/collections/magnani-et-al-2016.Magnani, Matthew; Douglass, Matthew; Porter, Samantha T. (2016). Three-Dimensional Models of Experimentally-Produced Lithic Artifacts Created using Expedient and Refined Photogrammetry Protocols. Retrieved from the University Digital Conservancy, http://dx.doi.org/10.13020/D6T88N
Two- and Three-Dimensional Representations of Thomas Bewick Woodblocks
No full textThe Bell Museum at the University of Minnesota owns fouteen wood blocks that were engraved in the workshop of Thomas Bewick to illustrate his History of British Birds, 2 vols. (Newcastle, 1797, 1804), as well as a block for a tail piece printed in The Fables of Aesop (Newcastle, 1818). This data set includes representations of these blocks captured using four digitization methods. 3D models were produced using structured light scanning and photogrammetry. Next, we used reflectance transformation imaging (RTI) to create interactive visualizations of the blocks' surfaces under variable lighting conditions. Finally, a high resolution two-dimensional image was generated for each block using a GIGAmacro device.Hancher, Michael; Luce, Donald T; McFadden, Colin; Porter, Samantha T. (2019). Two- and Three-Dimensional Representations of Thomas Bewick Woodblocks. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/hw8q-c585
Anything goes: From the songbook of Cole Porter (2009)
No full textDevising and arranging a concert of Cole Porter songs for The Orpheus Choir Wellington and accompanying orchestra for performance at the Wellington Town Hall on 28 November, 2009
Colwell T. Porter Civil War letter from Johnson's Island
No full textPrivate Colwell T. Porter wrote colthis letter to his sister Edna A. Porter while serving at Johnson's Island, near Sandusky, Ohio, during the Civil War. Porter was engaged in guard and fatigue duty with Company F of the 171st Ohio Volunteer Infantry. In this letter, he requests provisions and describes the prison as "fitted up in fine style." He also offers details of a recent escape attempt by rebel prisoners. The four-page letter measures 4.5" x 7.5" (11.43 x 19.05 cm). The envelope, which measures 5.5" x 3" (13.97 x 7.62 cm), is also included.
Colwell T. Porter enlisted in the 171st Ohio Volunteer Infantry on April 27, 1864, for 100 days service. After briefly serving at Johnson's Island, the 171st was ordered to Covington, Kentucky, on June 2, and was attacked at Kellar's Bridge (near Cynthiana) by Confederates led by General John Hunt Morgan. Porter was wounded and died on July 2, 1864, at the Old Soldier's Home in Cleveland, Ohio.
Johnson's Island, the site of a Civil War prison camp, is located in Sandusky Bay. Lieutenant Colonel William Hoffman leased the island from Leonard B. Johnson in 1861 for use as a prison camp for Confederate prisoners. Due to the abundant natural resources on the island, the conditions were not as harsh as those in many Southern prison camps. However, prisoners did suffer from disease, poor nutrition, and exposure to harsh Lake Erie winters. Created to hold Confederate officers, the prison housed about 3,000 prisoners by the end of the war
A Portable, Low-Cost, Open-Design Rig for Reflectance Transformation Imaging
No full textFiles for 3D printing (i.e. the rig arm mount and platform base) are available as both Google SketchUp and STL files. The plans for the laser cut portions of the rig are provided in Adobe Illustrator format. A full parts list along with assembly instructions and a guide to image acquisition are also included.
Note that this rig was designed for materials that are available in the United States. Adjustments may need to be made for use with metric materials.This simple and inexpensive rig is designed to assist researchers in capturing photographs for reflectance transformation imaging (RTI). It consists of 3D printed and laser cut parts, along with relatively easy to acquire hardware components.
This project was presented as a poster at the 2016 meeting of the European Society for the Study of Human Evolution (ESHE) in Madrid, Spain, and can be cited separately as: "Porter, Samantha T. (2016, September). A Portable, Low-Cost, Open-Design Rig for Reflectance Transformation Imaging. Poster presented at the meeting of the European Society for the Study of Human Evolution, Madrid, Spain. Retrieved from the Data Repository for the University of Minnesota, http://doi.org/10.13020/D66C7Q"Porter, Samantha T. (2016). A Portable, Low-Cost, Open-Design Rig for Reflectance Transformation Imaging. Retrieved from the University Digital Conservancy, http://doi.org/10.13020/D66C7Q
International publication of compositions and arrangements for jazz choir: Hey Cinderella; Hold my heart to blame; Anything goes: From the songbook of Cole Porter (2009); Who wants to be a millionaire; and You're sensational medley
No full textResearch and develop original compositions “Hey Cinderella” arranged for Adv, Int, and Beginner levels of Jazz Choir (dur. Approx 4-5 minutes) "Hold My Heart To Blame"(selected for the Wisconsin Choral Competitions Song List) and "The Gift Of Love" for publication by Really Good Music LLC., WI., USA.
Also arrangements from the concert "Anything Goes: From the songbook of Cole Porter (2009)" - "Cole Porter Latin Medley", "Who Wants To Be A Millionaire" and "You're Sensational Medley" devised and arranged for The Orpheus Choir Wellington NZ, for publication by Really Good Music LLC., WI., USA
Environmental policy without costs? A review of the Porter hypothesis
No full textThis paper reviews the theoretical and empirical literature connected to the so called Porter Hypothesis. That is, to review the literature connected to the discussion about the relation between environmental policy and competitiveness. According to the conventional wisdom environmental policy, aiming for improving the environment through for example emission reductions, do imply costs since scarce resources must be diverted from somewhere else. However, this conventional wisdom has been challenged and questioned recently through what has been denoted the “Porter hypothesis”. Those in the forefront of the Porter hypothesis challenge the conventional wisdom basically on the ground that resources are used inefficiently in the absence of the right kind of environmental regulations, and that the conventional neo-classical view is too static to take inefficiencies into account. The conclusions that can be made from this review is (1) that the theoretical literature can identify the circumstances and mechanisms that must exist for a Porter effect to occur, (2) that these circumstances are rather non-general, hence rejecting the Porter hypothesis in general, (3) that the empirical literature give no general support for the Porter hypothesis. Furthermore, a closer look at the “Swedish case” reveals no support for the Porter hypothesis in spite of the fact that Swedish environmental policy the last 15-20 years seems to be in line the prerequisites stated by the Porter hypothesis concerning environmental policy.Environmental policy; the Porter hypothesis; productivity; profitability
Three Dimensional Models and Two Dimensional Cross Sections of Châtelperronian and Protoaurignacian Lithic Cores from the Sites of Les Cottés and Roc de Combe
No full textThese data were generated as part of a study investigating the use of quantitative methods on three dimensional models of lithic artifacts. The majority of the data set is comprised of 3D scans of Châtelperronian and Protoaurignacian cores from the site of Les Cottés (France), which were generated using photogrammetry. Although cores from the site of Roc de Combe were also scanned for the associated study, we are not able to make them available here due to rights restrictions. The second part of the data set includes two dimensional representations of cross sections, which were from the 3D artifact models. These were used in two analyses, which are described in the associated publication in JCAA (see citation below).Leakey FoundationService Régional de l’Archéologie (France)Department of Human Evolution of the Max Planck Institute for Evolutionary AnthropologyFyssen FoundationPorter, Samantha T; Roussel, Morgan; Soressi, Marie. (2018). Three Dimensional Models and Two Dimensional Cross Sections of Châtelperronian and Protoaurignacian Lithic Cores from the Sites of Les Cottés and Roc de Combe. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/D6VD6K
The Environmental Porter Hypothesis: Theory, Evidence and a Model of Timing of Adoption
No full textThe Porter Hypothesis postulates that the costs of compliance with environmental standards may be offset by adoption of innovations they trigger. We model this hypothesis using a game of timing of technology adoption. We show that times of adoption are earlier the higher the non-adoption tax. The environmental tax turns the preemption game with low profits into a game with credible precommitment yielding high profits (pro-Porter). If there is a precommitment game without environmental taxes, the introduction of a tax leads to lower profits (anti-Porter). An evaluation of the empirical literature indicates that the Porter hypothesis holds even for profit-maximizing firms under multiple market imperfections such as imperfect competititon, X-inefficiency, and agency costs. These are more likely to be present in sectors with large firms. In many case studies that we evaluate, though, we detect an element of explicit or implicit subsidies for environmentally friendly behaviour, which is in line with Pigovian policies.Environmental Policy, Strategic Trade Theory, Technology Adoption, Porter Hypothesis
Mrs. Al T. Porter
No full textMrs. Al T. Porter The image shows a bust shot of Mrs. Al T. Porter. Published in Fort Worth Star-Telegram morning edition May 29, 1952https://mavmatrix.uta.edu/specialcollections_startelegram1950s/19809/thumbnail.jp
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