1,721,028 research outputs found
Steam Engine Prince Andrew at Skegness
No full textGeorge Dawson's Marshall steam traction engine No.66182 'Prince Andrew', registration 'CT3926' (built 1914). Photographed at Skegness, 1960. Photographs from the Cliff Marston and Cedric H. Conway collections
Prince Andrew
Full text linkThe author of this article first analyzes the material of some Old Russian Chronicles to find the first
mention of Tatars in Russia. He corrects the usual attitude in this field and claims that this mention
can be located much earlier. This material is also important for the reconstruction of King’s Andrew
biography which is the main purpose of the author’s investigation. Medieval Hungary by the 11th century
had intensive relations with Rus’, especially Southern Rus’, where Hungarian political interests
arose relatively early. A kind of “peak” of Hungarian aspirations in the South Rus’ is in the early 13th
century, when Hungarian kings had already declared themselves titular monarchs of Galich and Vladimir.
About increasing “national” and religious ambitions in a broad sense, about the ambitious Eastern
policy of Hungary, one can know from the expedition that was sent after 1230 to the East in search
of the Eastern Hungarians. One of the most colorful characters in the 1220–1230s, who personified
the Eastern policy of Hungary, was Prince Andrew, the son of Hungarian king Andrew II. The article
discusses his life according the famous Hungarian and old Russian sources and explains the general
historical background of this time. The work of this historical character is known primarily from the
Galician-Volhynian chronicle, in Hungary only fragmentary data survived about him, which is due
not only to a possible loss of the documents, but presumably to a kind of ‘deliberate forgetfulness’.
Refs 25
Steam Engine Prince Andrew at North Hykeham Rally
No full textPhotograph of G. Dawson's Marshall steam traction engine No.66182 'Prince Andrew', registration ' CT3926'(built 1914). Image taken at North Hykeham Traction Engine Rally, 15 June 1963 whole view
Leveraging light-curve inversion for kinematic state estimation of uncooperative targets
No full textThe growing number of space objects threatens mission sustainability, making precise real-time tracking essential for Active Debris Removal (ADR) and In-Orbit Servicing (IOS) missions. For an uncooperative target, a Vision Based Navigation (VBN) relative pose (attitude and position) estimation system coupled with a state estimator are likely required. Missions can further be supported by commissioning unresolved observations of the target to produce light curves which can then be used to extract rotation rates and axes of rotation. This work performs the novel task of exploiting the light curves as kinematic priors to enhance the performance of the state estimator.
An Extended Kalman Filter (EKF) and an Unscented Kalman Filter (UKF) are implemented. Light curve motion prior extraction and VBN pose estimation are simulated. Three independent studies are performed exploiting the motion priors: (1) Optimizing the Kalman filter tuning for specific kinematic scenarios; (2) Injecting the priors as an initial condition to improve convergence and steady state errors; and (3) Enhancing an outlier rejection function with supplementary proxy measurements from the priors. Performance is evaluated on a custom synthetic light curve dataset based on the Atlas Centaur rocket body, and a private commercial dataset based on the Vega Secondary Payload Adapter from commercial collaborator, Clearspace. Pose estimation results are simulated based on state-of-the-art machine learning spacecraft pose estimators. By exploiting kinematic priors, convergence time and steady state error reductions of 3× or more are exhibited for certain state components, dependent on the kinematic scenario and filter tuning. In general, several trade-offs are observed with kinematic priors providing the opportunity for the lowest steady state errors. This method has the potential to improve the pose estimation accuracy for proximity operations of uncooperative tumbling objects, supporting ADR and IOS missions, especially considering the mild assumptions required
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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
Full text linkWe 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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