Stability implications of delay distribution for first-order and second-order systems

Kiss, G., & Krauskopf, B. (2009). Stability implications of delay distribution for first-order and second-order systems. Early version, also known as pre-print Link to publication record in Explore Bristol Research PDF-documen

Blur point versus indistinguishable point in assessment of accommodation: objective and subjective findings in early presbyopes

Aim: To measure the distance from the eye and the refraction of the eye at the point at which print blurs and the point at which it becomes unreadable. Methods: Subjective accommodation in 7 early presbyopic subjects (mean age 45 years), with no additional near correction, was tested using 6/12 reduced Snellen and 6/12 Lea symbols. The point at which blur was first noticed and the point at which the print became indistinguishable were noted in centimetres. Objective measures of refraction were taken at each of these points. Results: Subjective and objective results for reduced Snellen and Lea symbols were similar ( p = 0.91; p = 0.81) as were the points where the print was no longer distinguishable ( p = 0.23; p = 0.72). The difference between the blur point and the indistinguishable point measured in centimetres for both the reduced Snellen text and Lea symbols were statistically significant ( p = 0.005; p = 0.0001). The objective measures for these points, however, were not statistically different ( p = 0.32 and p = 0.63, respectively). Conclusion: A clinically significant difference exists in the distance from the eyes between the point at which text blurs and the point at which it becomes indistinguishable. No significant change occurs in accommodation when measured objectively after the blur point. It is recommended that the end point of this test is the point at which print starts to blur

Impact dynamics of large dimensional systems

systems. Early version, also known as pre-print Link to publication record in Explore Bristol Researc

Comparison of support structure generation techniques for 3d printing

Master's Project (M.S.) University of Alaska Fairbanks, 2016As the old patents from the late 1980's and early 1990's expire, additive fabrication and rapid prototyping has seen a boom in recent years. Often called 3D printing, in the additive fabrication process material is deposited on previous layers. The problem of supporting overhangs in 3D printing is not one encountered in the traditional method of subtractive fabrication. This paper examines and compares three methods of generating support structures for these overhangs: a scaffolding structure, simple pillars, and the supports automatically generated by the open source slicing tool Slic3r. Our results show that both the scaffolding structure and simple pillars use less material than Slic3r's supports. Additionally, the scaffolding structure and simple pillars print in a comparable amount of time as Slic3r's supports and all the models have a similar visual print quality. This conservation of material without a reduction in print quality make our method of scaffolding support structures preferable to the supports automatically generated by Slic3r

Locking Out the Mother Corp: Nationalism and Popular Imaginings of Public Service Broadcasting in the Print News Media

Early promoters of public-service broadcasting (PSB) in Canada emphasized its democratic and nationalist merit. Of these twin pillars, only nationalism appears to still be standing. In this article, the author surveys the vision of PSB that emerged in the national English-language print media during the 2005 CBC/Radio-Canada lockout and suggests that our peculiar brand of multicultural nationalism (which underestimates the divisions within civil society) has subsumed democratic values. Yet, she argues democratic principles—particularly those of access, participation, and publicness—are critically important to defending the relevance of PSB in the current environment of seemingly endless media choices and borderless technology

Method and Meaning: Selections from the Gettysburg College Collection

What is art historical study and how it should be carried out are fundamental questions the exhibition Method and Meaning: Selections from the Gettysburg College Collection intends to answer. This student-curated exhibition is an exciting academic endeavor of seven students of art history majors and minors in the Art History Methods course. The seven student curators are Shannon Callahan, Ashlie Cantele, Maura D’Amico, Xiyang Duan, Devin Garnick, Allison Gross and Emily Zbehlik. As part of the class assignment, this exhibition allows the students to explore various art history methods on individual case studies. The selection of the works in the exhibition reflects a wide array of student research interests including an example of 18th century Chinese jade chime stone, jade and bronze replicas of ancient Chinese bronze vessels, a piece of early 20th century Chinese porcelain, oil paintings by Pennsylvania Impressionist painter Fern Coppedge, prints by Salvador Dalí and by German artist Käthe Kollwitz, and an early 20th century wood block print by Japanese artist Kawase Hasui. [excerpt]https://cupola.gettysburg.edu/artcatalogs/1014/thumbnail.jp

Privilege and Property. Essays on the History of Copyright

Copyright law is the site of significant contemporary controversy. In recent years copyright history has transformed as a subject from being one of interest to a few books historians to the focus of sustained historical investigation attracting the attention of scholars from across the humanities. This book comprises a collection of essays on copyright history by leading experts drawn from a range of countries and disciplinary perspectives. Covering the period from 1450 to 1900, these essays engage with a number of related themes. The first considers the general movement, from the sixteenth century onwards, from privilege to property-based conceptions of copyright protection. The second addresses the relationship between the protection provided for literary and print materials and that provided for other forms of cultural production. The third concerns the significance and relevance of these various histories in shaping and informing contemporary policy and academic practice. Essays include: 0. The History of Copyright History, by Kretschmer, Deazley & Bently; 1. From Gunpowder to Print: The Common Origins of Copyright and Patent, by Joanna Kostylo; 2. A Mongrel of early modern copyright: Scotland in European Persepctive, by Alastair Mann; 3. The Public Sphere and the Emergence of Copyright: Areopagitica, the Stationers’ Company, and the Statute of Anne, by Mark Rose; 4. Early American Printing Privileges: the Ambivalent Origins of Authors’ Copyright in America, by Oren Bracha; 5. Author and Work in the French Print Privileges System: Some Milestones, by Laurent Pfister; 6. A Venetian Experiment on Perpetual Copyright, by Maurizio Borghi; 7. Les formalités son mortes, vive les formalities! Copyright formalities in nineteenth century Europe, by Stef van Gompel; 8. The Berlin Publisher Friedrich Nicolai and the reprinting sections of the Prussian Statute Book of 1794, by Friedemann Kawohl; 9. Nineteenth Century Controversies relating to the protection of Artistic Property in France, by Frédéric Rideau; 10. Maps, Views and Ornament. Visualising Property in Art and Law: The Case of pre-modern France, by Katie Scott; 11. Breaking the Mould? The Radical Nature of the Fine Art Copyright Bill 1862, by Ronan Deazley; 12. ‘Neither bolt nor chain, iron safe nor private watchman, can prevent the theft of words’: The birth of the performing right in Britain, by Isabella Alexander; 13. The Return of the Commons: Copyright History as a Common Source, by Karl-Nikolaus Peifer; 14. The Significance of Copyright History for the Publishing History and Historians, by John Feather; 15. Metaphors of Intellectual Property, by William St Clair. The volume is a companion to the digital archive Primary Sources on Copyright (1450-1900), funded by the UK Arts and Humanities Research Council (AHRC): www.copyrighthistory.or