Search results | Digital Grinnell

Title: Historical Map Annotations for Text Detection and Recognition
Description: This data is set designed for testing the performance of text/graphics separation and character recognition algorithms on text in scanned historical map images. Thirty one maps from the nineteenth and early twentieth centuries (1866–1927) were chosen from nine atlases in the David Rumsey Map Collection (http://davidrumsey.com). Most maps are of individual U.S. states, though some are regional and one is of the entire U.S.; most feature little handwritten text. The original MrSid files are converted into uncompressed TIFF images for a manual annotation, stored in JSON format. The authors gratefully acknowledge the David Rumsey Map Collection as the source of the map images, which come with the following notice: Images copyright © 2000 by Cartography Associates. Images may be reproduced or transmitted, but not for commercial use. This work is licensed under a Creative Commons [Attribution-NonCommercial-ShareAlike 3.0 Unported] license (http://creativecommons.org/licenses/by-nc-sa/3.0). By downloading any images from this site, you agree to the terms of that license.
PID: grinnell:23294

Title: Indispensable in a Civilized Society, as Necessary as Food:" A Consideration of Manuel Payno's Monumental Effort to Found the Bi
Description: This article combines history, biography, and the translation of a nineteenth-century primary source to consider the role of Manuel Payno, a Mexican government official and noted writer, in establishing his country's national library. Profiles of Mexican library history and of Manuel Payno provide context for the appended English translation of Payno's 1869 article,
PID: grinnell:227

Title: Jacobian Varieties of Hurwitz Curves with Automorphism Group PSL(2,q)
Description: The size of the automorphism group of a compact Riemann surface of genus g > 1 is bounded by 84(g-1). Curves with automorphism group of size this bound are called Hurwitz curves. In many cases the automorphism group of these curves is the projective special linear group PSL(2,q). We present a decomposition of the Jacobian varieties for all curves of this type and prove that no such Jacobian variety is simple.
PID: grinnell:13254

Title: Ken Christiansen Collembola Collection
Description: This database includes all records of Collembola which are or were in the Collection of K. Christiansen. The records are mainly from North America but include some specimens from Mexico and Lebanon, Syria and China
PID: grinnell:13118

Title: LaFexCo(1−x)O3 Thin-Film Oxygen Reduction Catalysts Prepared Using Spray Pyrolysis without Conductive Additives
Description: LaFexCo(1−x)O3 thin films were prepared on fluorine-doped tin oxide conducting glass substrates by spray pyrolysis without any conductive additives and evaluated for their ability to catalyze the oxygen reduction reaction. Onset potential and current density were found to be comparable to platinum, and the resulting crystallite size was on the order of 20 nm. Coordination of the precursor metal ions by citrate was found not to be advantageous. Results from multiple scan linear sweep voltammetry suggest lattice oxide saturation during reduction of oxygen and lattice oxide depletion upon water oxidation. The color of the best-performing composition changes dramatically between 1.2 and −1.15 V versus saturated calomel electrode, so X-ray photoelectron spectra of the fully oxidized and reduced films were compared, demonstrating that cobalt in the film changes oxidation state. Performance of the films as a function of iron-to-cobalt ratio is consistent with what others have reported in the literature, indicating that spray pyrolysis is an efficient method to prepare and evaluate new catalytic materials.
PID: grinnell:26882

Title: Let's Talk About Collections and Space.
Description: In order to make room for a much needed classroom on the 2nd floor of Burling Library nearly 325,000 volumes of materials were handled and relocated.
PID: grinnell:21182

Title: Lith Bibliography
Description: This is a computerization of bibliographic file cards I started keeping around 1980 for my own research, incorporating most of the references from my two books, Flintknapping: Making and Understanding Stone Tools, and American Flintknappers: Stone Age Art in the Age of Computers, plus many more. It is large but far from comprehensive, as publications with relevance to stone tool studies are literally innumerable. No mortal human could possibly read them all or would want to. Many entries are annotated, mostly notes to remember what was important in my research at the time and what I thought of an article. Comments [in brackets] thus reflect my interests and biases at some point in the last 30+ years, and I have occasionally added comments for students and others who might use this bibliography. The more recent notes tend to be longer as my memory gets shorter. Although irregular, the annotations and titles make it possible to search somewhat by key words and authors. Many of the unannotated newsletter articles are cited in my books. Articles primarily about atlatls or bows are in my Atlatl Bibliography and mostly not duplicated here. As they relate to my research projects, a few non-lithic miscellaneous experimental archaeology articles are included, some on looting, faking, archaeological politics and the antiquities market, and some archaeology related fiction.
PID: grinnell:11683

Title: Local adaptation and range boundary formation in response to complex environmental gradients across the geographical range of Cl
Description: Using field measurements, two common garden studies, and QST–FST analyses, we examined environmental and genetic influences on plant phenotype across the geographical range of Clarkia xantiana ssp. xantiana.
PID: grinnell:26659