The Evolution of Symbols on Nautical Charts Prior to 1800

This study attempts to determine the way in which symbols evolved on nautical charts, the identity of originators of these symbols, the spread in their use, and the forces involved in their continuing evolution. A twofold approach is utilized to resolve these questions. First a history of nautical charts prior to 1800 is presented and second, the actual examination of over 4200 nautical charts was carried out to discover and document their symbol content. A graphic summary of the symbols used on these charts is presented along with an analysis of the data gathered in 1 ight of the history of nautical cartography. The evolution of the symbols on nautical charts was found to be closely aligned with one of the three types of symbols described by Dreyfuss (1972): arbitrary, abstract or representational. The arbitrary symbols examined in this study clearly went through an evolutionary process, whereas the abstract and representational symbols remained virtually static throughout the period. The originators of the symbols are given when identifiable and the spread and evolution of the symbols is discussed. From this study it can be concluded that this type of research is most valuable in discovering the evolution of symbols on nautical charts and that the graphic summary could be considered a standard for evaluating the evolution and use of symbols on nautical charts prior to 1800

Looking Back: Towards a Socialist America

Using original course documents and interviews with early participants, this essay contextualizes and reflects on Arnesen, Ebb, Rome, and Ward's account of a nineteen-seventies model for "teaching about socialism." 

Model Lessons to Use With The Student Atlas of Oregon

Model lessons for teachers to use with The Student Atlas of Oregon.https://pdxscholar.library.pdx.edu/geographyed_instructional/1001/thumbnail.jp

Finishing the euchromatic sequence of the human genome

The sequence of the human genome encodes the genetic instructions for human physiology, as well as rich information about human evolution. In 2001, the International Human Genome Sequencing Consortium reported a draft sequence of the euchromatic portion of the human genome. Since then, the international collaboration has worked to convert this draft into a genome sequence with high accuracy and nearly complete coverage. Here, we report the result of this finishing process. The current genome sequence (Build 35) contains 2.85 billion nucleotides interrupted by only 341 gaps. It covers ∼99% of the euchromatic genome and is accurate to an error rate of ∼1 event per 100,000 bases. Many of the remaining euchromatic gaps are associated with segmental duplications and will require focused work with new methods. The near-complete sequence, the first for a vertebrate, greatly improves the precision of biological analyses of the human genome including studies of gene number, birth and death. Notably, the human enome seems to encode only 20,000-25,000 protein-coding genes. The genome sequence reported here should serve as a firm foundation for biomedical research in the decades ahead

XVI American Literature: The Twentieth Century

Abstract This chapter has eight sections: 1. Poetry; 2. Fiction 1900–1945; 3. Fiction since 1945; 4. Drama; 5. Comics; 6. African American Writing; 7. Native Writing; 8. Latino/a, Asian American, and General Ethnic Writing. Section 1 is by James Gifford and Margaret Konkol; section 2 is by James M. Clawson; section 3 is by Mary Foltz; section 4 is by Sophie Maruéjouls-Koch; section 5 is by Orion Ussner Kidder; section 6 will resume next year; section 7 is by James Gifford and Lindsay Parker; section 8 will resume next year