1,355,187 research outputs found
How Struve and Tenner Started the Work of Their Life
No full textAbstractThe great Russian-Scandinavian arc measurement was initiated by two men: F. G. W. Struve and C. F. Tenner. When they decided to join their endeavours, they both had obtained a substantial experience - Struve had completed the Livonia triangulation and he had measured the meridian arc from Jekabpils to Hogland, and Tenner had finished the triangulation for the Vilnius government and was continuing it for Kurland, Grodno and Minsk governments. In 1827 Tenner came forward with the idea to join their arcs, and during the meeting of both men in Tartu in 1828 they signed the respective agreement. The most difficult point in merging the projects was the use of measuring rods with different units of length: Struve used European toises and Tenner Russian sazhens. These rods had to be thoroughly compared, which they did and the results were checked independently by F. F. Schubert and F. W. Bessel who found them to be in a very good accordance. The later extension of the meridian arc northward to Fuglenes and to Stara-Nekrasivka in south allowed Struve to determine the preliminary result for the oblateness of the Earth with a great precision (α = 1:294.73).</jats:p
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Odd diagrams, Bruhat order, and pattern avoidance
No full textThe odd diagram of a permutation is a subset of the classical diagram with additional parity conditions. In this paper, we study classes of permutations with the same odd diagram, which we call odd diagram classes. First, we prove a conjecture relating odd diagram classes and 213- and 312-avoiding permutations. Secondly, we show that each odd diagram class is a Bruhat interval. Instrumental to our proofs is an explicit description of the Bruhat edges that link permutations in a class.Mathematics Subject Classifications: 05A05, 05A1
How Struve and Tenner Started the Work of Their Life
No full textThe great Russian-Scandinavian arc measurement was initiated by two men: F. G. W. Struve and C. F. Tenner. When they decided to join their endeavours, they both had obtained a substantial experience - Struve had completed the Livonia triangulation and he had measured the meridian arc from Jekabpils to Hogland, and Tenner had finished the triangulation for the Vilnius government and was continuing it for Kurland, Grodno and Minsk governments. In 1827 Tenner came forward with the idea to join their arcs, and during the meeting of both men in Tartu in 1828 they signed the respective agreement. The most difficult point in merging the projects was the use of measuring rods with different units of length: Struve used European toises and Tenner Russian sazhens. These rods had to be thoroughly compared, which they did and the results were checked independently by F. F. Schubert and F. W. Bessel who found them to be in a very good accordance. The later extension of the meridian arc northward to Fuglenes and to Stara-Nekrasivka in south allowed Struve to determine the preliminary result for the oblateness of the Earth with a great precision (α = 1:294.73)
Review of Why Things Bite Back: Technology and the Revenge of Unintended Consequences by Edward Tenner
No full textHistorian of science Edward Tenner begins his book with a typical example of what he sees as the irony of modern life in a technological society. With the advent of electronic mail and inter-office networking, one would expect that the amount of paper used in offices would markedly decline, but in fact, notes Tenner, paper recycling bins are more full than ever before. People do indeed communicate through e-mail, but since they mistrust the permanence of electronic transmissions, they also back them up with an ever increasing amount of paper communication. In his typically amusing way, Tenner notes that when the office supply stores Office Max and Staples opened up in his hometown of Princeton, their most sought after products were not computers or software, but five-thousand-sheet cases of paper for photocopiers, laser printers, and fax machines
Walt and Tenner Joyce Hughes family in front of a building
No full textBlack and white photograph shows Walt and Tenner Joyce Hughes and their family, with the image pasted on a thick black card. The photograph is faded, individual faces and features are hard to distinguish
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Review of Why Things Bite Back: Technology and the Revenge of Unintended Consequences by Edward Tenner
No full textHistorian of science Edward Tenner begins his book with a typical example of what he sees as the irony of modern life in a technological society. With the advent of electronic mail and inter-office networking, one would expect that the amount of paper used in offices would markedly decline, but in fact, notes Tenner, paper recycling bins are more full than ever before. People do indeed communicate through e-mail, but since they mistrust the permanence of electronic transmissions, they also back them up with an ever increasing amount of paper communication. In his typically amusing way, Tenner notes that when the office supply stores Office Max and Staples opened up in his hometown of Princeton, their most sought after products were not computers or software, but five-thousand-sheet cases of paper for photocopiers, laser printers, and fax machines
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Letter to David Miller from T .M. Tenner
No full textLetter dated February 17, 1861 to David Miller from T. M. Tenner, Tucson, New Mexico, Arizona, regarding the presence of the Sonora Revolutionists, revolutionaries, who meet nearby and steal stock from the settlers. He noted the Neutrality Laws for the United States forbid a armed force in the country, and that the Federal military would not act on this. He requested a Deputy Marshal be appointed within the jurisdiction of Arizona County and recommended Josiah Crawford as the appointee. HL introduction page overlaid by document. Letter in English, handwritten, 1pp/fr
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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