2,849 research outputs found
Data set for "The influence of sleeper material characteristics on railway track behaviour: concrete vs composite sleeper"
No full textData to create figures from the article: Ferro, E., Harkness, J., & Le Pen, L. (2020). The influence of sleeper material characteristics on railway track behaviour: concrete vs composite sleeper. Transportation Geotechnics. </span
The mechanical behaviour of fibre reinforced railway ballast
No full textBallasted track is the most traditional form of railway track but is still widely predominant and able to cope with high performance demands, such as those typical of high speed lines. A major disadvantage of ballasted track is its tendency to settle with the passage of trains, mainly due the accumulation of permanent deformation in the ballast under cyclic loading. This leads to track geometry deterioration, as the settlement is unlikely to be uniform, jeopardising the safety of train operations and ride quality. Therefore, costly maintenance operations, e.g. tamping, are periodically required to restore the correct ballast level. Also, rail transport demand is growing in many parts of the world, increasing the need for track maintenance while reducing the maintenance windows. In light of this, the mechanical behaviour of ballast has been widely studied and techniques to improve it have been proposed. A novel technique with the potential to reduce ballast settlement is fibre reinforcement, which consists of the addition of unbound randomly placed discrete fibres. It is widely accepted that fibre reinforcement provides additional strength to granular materials ranging from sand to gravel. Hence, it can potentially reduce ballast tendency to settle by increasing the particle interlocking. Fibre reinforcement seems suitable to railway ballast, as it is expected to maintain adequate track stiffness and permeability, not produce planes of weakness, and be compatible with standard maintenance operations. Moreover, fibres can be potentially obtained from recycled materials, separated from ballast after use for recycling, and added either during ballast cleaning or renewals. Nevertheless, the effect of fibre reinforcement on the deformability of granular materials, especially under cyclic loading, remains unclear. This research investigated the mechanical behaviour of fibre reinforced railway ballast through full-size laboratory tests, reproducing a section of single-line track extended to the shoulder and subjected to a sinusoidal load representative of train passage. The tests explored the effect of fibre dimensions and content for two different types of inclusions, i.e. filament-like and tape-like fibres. It was found that the addition of properly selected fibres can reduce track settlement, increase the long-term support of the sleeper ends, and reduce ballast damage. This might be explained by the fibres inhibiting the micromovements exhibited by the particles in each load cycle, while the effect of the additional confinement was secondary. However, the holistic understanding of the mechanics of fibre-reinforcement would require further experiments designed specifically to capture ballast behaviour at the particle scale
Ernest Thompson Seton: an unforgettable personality, by Edgar M. Robinson
No full textThis piece, titled “Ernest Thomas Seton: an unforgettable personality”, gives a first hand interpretation of who Ernest Thompson Seton (it is believed that whoever put the cover on this document spelled his name wrong) was through the eyes of Edgar Robinson. Robinson explains what a strong relationship the two of them had and what a strong mentor Seton was to Robinson. Ernest Thompson Seton was an author and illustrator of more than 50 works, and was largely responsible for the American Indian influence in the Boy Scouts of America that offered young people knowledge of an outdoor life based on Native American Indian customs, legends and beliefs. Seton was Chief Scout of the Boy Scouts of America from 1910 to 1915. Edgar M. Robinson was a 1901 graduate from the YMCA Training School, now Springfield college, where he later returned to serve on the faculty as the Honorary Director of Boys Work Courses and the Adviser in Methods and Principles in Work with Boys from 1927-1937.For biographical information on Edgar M. Robinson, see: https://springfield.as.atlas-sys.com/agents/people/554
For more information on Ernest Thompson Seton, see: https://springfield.as.atlas-sys.com/agents/people/553On the bottom of page number 1 there is a rip, which prevents part of the bottom two lines from being read. On that back of page number one appear the numbers "46757" written in pencil
Os paratextos das antologias brasileiras de contos de Edgar Allan Poe no século XXI
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Estudos da Tradução, Florianópolis, 2014.Esta tese analisa elementos paratextuais em antologias brasileiras de contos de Edgar Allan Poe lançados ou reeditados nos doze primeiros anos do século XXI, verificando de que forma o autor e sua obra são apresentados ao leitor através desses paratextos. Para tanto, analiso quartas capas, orelhas, prefácios, posfácios e notas. O nível de participação do tradutor na utilização desses elementos é também examinado, para que se possa averiguar até que ponto esse intermediador de culturas teve visibilidade nas publicações. A referida análise é norteada, principalmente, pelos fundamentos teóricos de Gérard Genette, sobretudo em seu livro intitulado Paratextos Editoriais (2009), do original Seuils (1987).Abstract : This thesis analyzes paratextual elements in Edgar Allan Poe's Brazilian anthologies of short stories published or reprinted in the first twelve years of the 21st century, observing how the author and his fictional writings are presented to the reader through those paratexts. Thus, I analyze back pages, flaps, forewords, afterwords, and notes. The use the translator made of those elements is examined in order to assess the translator's visibility in the published editions. The referred analysis is grounded mainly on Gérard Genette's theory, especially in his book entitled Editorial Paratexts (2009) from the original Seuils (1987)
Letter to the Editor from the author, and response from Edgar Allen Beem, on Bee
No full textLetter to the Editor from the author, and response from Edgar Allen Beem, on Beem\u27s book review of Maine: An Explorer\u27s Guide and his comparison of it to Maine Handbook
Edgar Frank Family Collection 1910-1959
No full textEdgar Frank was an author. This collection contains a genealogical description of Edgar Frank's family, a circa 1910 article from the Gemeindeblatt der
Deutsch-Israelistischen Gemeinde, 7 postcards the majority of which have themes of Judaica (such as the Touro Synagogue in Rhode Island), and a list of corrections for the publication
Zemanim by Edgar Frank.Edgar Frank, 1959The original German language inventory is available in the folder.Processed for digitizationSent for digitizationReturned from digitizationLinked to online manifestationdigitize
Account of author Edgar Beem\u27s climb of Mount Katahdin with his 13-year-old daug
No full textAccount of author Edgar Beem\u27s climb of Mount Katahdin with his 13-year-old daughter, Hannah, commenting on the social experience of climbing the mountain, and noting that as many as 50,000 people a year make the climb. The day of their climb was a Class II Day, meaning that park officials strongly recommended that climbers not go above the treeline. Somewhat relieved, Beem and his daughter contented themselves with hiking up to the treeline and turning around
To what extent may the unfavorable viewpoints of critics on E. A. Poe's use of horror and social satire in his stories be refuted by examples from and analysis of the author's eight short stories?
No full textWith numerous short stories and poems, Edgar Allan Poe is considered to be the piquant and
astounding milestone of the American Literature. Yet, his style and achievements have always
been interpreted antagonistically by large numbers of critics. This study analyzes the features
unique to Edgar Allan Poe in his short stories “Murders In The Rue Morgue”, “The Fall of
The House of Usher”, “A Tale of Jerusalem”, “The Pit and The Pendulum”, “The System of
Doctor Tarr and Professor Fether”, “A Cask Of Amonillado”, “The Masque of Red Death”
and “The Man That Was Used Up” while refuting to chosen examples of negative reviews
about Edgar Allan Poe.
Due to the fact that Edgar Allan Poe is well-known for his usage horror, satire, humor and
fiction in his short stories, these qualities have been criticized mostly by many writers and
philosophers as well. In this sense, the scope of the study will be sharpened on how these
techniques are used in his short stories to make them nonpareil and what was Edgar Allan
Poe’s authorial intention while utilizing these attributes in his works. At this point the analysis
of the characters, themes and plot will be prioritized compared to the language and style that
Edgar Allan Poe uses in his texts.
Since the criticism against Poe focus on the usefulness of such features in his short stories and
how they intimidate the reader from the text, the study proves that the gap between Poe and
the reader is a simple issue of reciprocal misunderstanding which is proven to be artificial and
bogus with examples and facts from his short stories
Genealogical collections concerning the Scottish house of Edgar.
No full textIn the preface to his "An account of the sirname Edgar" the author mentions "the use made of a portion of his materials by 'a Comittee of the Grampian Club,' in the recent anticipatory volume, which has been published in disregard of his prohibition."Ed. by Andrew Edgar and Charles Rogers.Mode of access: Internet.New York Genealogical and Biographical Society
The influence of sleeper material characteristics on railway track behaviour: concrete vs composite sleeper
No full textComposite sleepers and bearers formed of polymers and sometimes steel or fibre reinforcement are an alternative to traditionally used timber or prestressed concrete counterparts. Composite materials offer the combined benefits of the compliant sleeper/ballast contact of timber with the longer service life of concrete. However, composite and timber sleepers have lower bending stiffness compared with concrete, and this affects their track performance. To better understand the influence of sleeper material on performance, a concrete and a composite sleeper were tested in the Southampton Railway Testing Facility. Test results were interpreted with the aid of finite difference and discrete element method numerical modelling. It was found that composite sleepers can provide a more compliant sleeper/ballast interface with increased numbers of ballast grain contacts of larger area that attenuate the peak contact forces. However, owing to their lower bending stiffness, they have more exaggerated deflection profiles and a tendency to become centre-bound compared with stiffer prestressed concrete counterparts
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