1,354,946 research outputs found
Investigating Complex Geometrical Features in LPBF-Produced Parts: A Material-Based Comparison Between Different Titanium Alloys
No full textThe Ti–6Al–4V (Ti64) alloy is a well-established material to be processed via laser powder bed fusion (LPBF). Recently,
other α + β titanium alloys are receiving attention, such as Ti–6Al–2Sn–4Zr–6Mo (Ti6246). Their typical industrial fields of
application (aerospace, automotive), often require critical design choices, such as low wall thicknesses and hollow channels.
Thus, a comparative analysis between these two competitor alloys in terms of processability was conducted in this work.
To do so, specific sample designs were developed. The specimens were analyzed in terms of geometrical compliance with
the initial design, porosity, and microstructure. A correlation between the width of the specimens and their porosity, micro-
structure and hardness was found. Overall, both the alloys proved to be well processable, even for very low wall thickness
(300 μm) and channel diameter (1 mm) values. Nevertheless, the Ti6246 alloy seemed to behave better in specific scenarios.
For instance, some Ti64 specimens provided delamination. The hollow channels proved to be challenging for both materi-
als, mainly due to the high amount of residual powder particles adhered to the upper part of the holes. This works aims at
giving a materials perspective on process-related issues, considering the LPBF-induced defectology and microstructural
variations in these Ti alloys
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
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A letter from Abel Garza to Dr. Hector P. Garcia, sardonically congratulating Dr. Garcia for the election of John Bircher as Mayor.
No full textA letter from Abel Garza to Dr. Hector P. Garcia, sardonically congratulating Dr. Garcia for the election of John Bircher as Mayor
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
Vegetarisk (rå)kost och det reformerade livet : Maximilian Bircher - Benner och de svenska hälsokoströrelserna
No full textRaw vegetarian food and life reform: Maximilian Bircher-Benner and the Swedish health foods movements. By Motzi Eklöf. Movements for life reform, natural healing, and health foods have persisted in Sweden since the last decades of the 19th century. Stressing the importance of less alcohol and other drugs, a proper diet, and the use of natural healing methods, they have displayed conflicts concerning individual rights to decide in matters concerning one’s own body and health in relation to a medicine and state demands. Swedish movements for natural healing and health foods have developed under influence from leading figures and movements in Sweden, Germany, Switzerland, North America, and England. In 1900, the Swiss physician Maximilian Bircher-Benner (1867–1939) launched his theory of ”sunlight food”, meaning that uncooked vegetables and fruits were containing the most energy, whereas meat was radically less nourishing. His theories were contrary to contemporary medical and bourgeois culture considering meat as the optimum food, at least for real men. He became an outsider in medicine until the discovery of vitamins in the 1920s lent him some support. His clinic ”Lebendige Kraft” in Zürich received well-to-do clients from all over the world; these were treated with different physical methods, raw vegetarian food, and proper routines for day and night. Stressing the importance of raw vegetarian food, Bircher-Benner influenced vegetarians and food reformers in Sweden during the 20th century. In the 1930s, especially women with connections to the Swedish vegetarian association, founded in 1903, recommended his philosophy of food and natural healing. Menus copied from his books were used in health resorts, vegetarian pensions, and restaurants. But during the decades around World War II, Are Waerland dominated the Swedish health-food scene, demanding adherence to his very restrictive health food programme. The post-war health movements drew on both Waerland and Bircher-Benner in their food recommendations. This article proposes factors facilitating or counteracting a broader acceptance of Bircher-Benner’s ideas in Sweden. Health resorts and strong lay traditions in the health care field have maintained a tradition of non-invasive and non-pharmacological healing methods. A strained relationship between medical doctors and lay vegetarian spokesmen have made a more serious discussion of the topic difficult. Political associations tied to natural healing in Germany during the 1930s have affected the debate and have probably also restrained a broader acceptance of these ideas. Today, scientific studies have resulted in official nourishment recommendations similar to a previously launched ”health food”
Vegetarisk (rå)kost och det reformerade livet [Elektronisk resurs] : Maximilian Bircher - Benner och de svenska hälsokoströrelserna
No full textRaw vegetarian food and life reform: Maximilian Bircher-Benner and the Swedish health foods movements. By Motzi Eklöf. Movements for life reform, natural healing, and health foods have persisted in Sweden since the last decades of the 19th century. Stressing the importance of less alcohol and other drugs, a proper diet, and the use of natural healing methods, they have displayed conflicts concerning individual rights to decide in matters concerning one’s own body and health in relation to a medicine and state demands. Swedish movements for natural healing and health foods have developed under influence from leading figures and movements in Sweden, Germany, Switzerland, North America, and England.In 1900, the Swiss physician Maximilian Bircher-Benner (1867–1939) launched his theory of ”sunlight food”, meaning that uncooked vegetables and fruits were containing the most energy, whereas meat was radically less nourishing. His theories were contrary to contemporary medical and bourgeois culture considering meat as the optimum food, at least for real men. He became an outsider in medicine until the discovery of vitamins in the 1920s lent him some support. His clinic ”Lebendige Kraft” in Zürich received well-to-do clients from all over the world; these were treated with different physical methods, raw vegetarian food, and proper routines for day and night.Stressing the importance of raw vegetarian food, Bircher-Benner influenced vegetarians and food reformers in Sweden during the 20th century.In the 1930s, especially women with connections to the Swedish vegetarian association, founded in 1903, recommended his philosophy of food and natural healing. Menus copied from his books were used in health resorts, vegetarian pensions, and restaurants. But during the decades around World War II, Are Waerland dominated the Swedish health-food scene, demanding adherence to his very restrictive health food programme. The post-war health movements drew on both Waerland and Bircher-Benner in their food recommendations.This article proposes factors facilitating or counteracting a broader acceptance of Bircher-Benner’s ideas in Sweden. Health resorts and strong lay traditions in the health care field have maintained a tradition of non-invasive and non-pharmacological healing methods. A strained relationship between medical doctors and lay vegetarian spokesmen have made a more serious discussion of the topic difficult. Political associations tied to natural healing in Germany during the 1930s have affected the debate and have probably also restrained a broader acceptance of these ideas. Today, scientific studies have resulted in official nourishment recommendations similar to a previously launched ”health food”.</p
Vivaldi – The French Connection
No full textFirst recording of solo Vivaldi concertos by a British group using Venetian pitched wind instruments.Gramophone Award Winner 2010.Amercian Top 10 (Billboard Chart).<br/
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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