1,724,183 research outputs found
ISO 9283 implementation for robot positioning accuracy measurement
No full textTato bakalářská práce se zaměřuje na implementaci normy ISO 9283 na měření přesnosti polohování průmyslových robotů a její experimentální ověření na robotu Stäubli TX2-90. Je navržen a vytvořen program, který dle požadavků normy, parametrů měřicího zařízení a měřicího pracoviště generuje souřadnice pro polohování robotu.This bachelor's thesis focuses on the implementation of ISO 9283 standard for measuring the positioning accuracy of industrial robots and its experimental verification on the Stäubli TX2-90 robot. A program has been designed and created to generate robot positioning coordinates according to the standard requirements and the parameters of the measuring equipment and measuring station
Linked collectors and determiners for: Taxonomic utility of niche models in validating species concepts: A case study in Anthophora (Heliophila) (Hymenoptera: Apidae).
No full textNatural history specimen data linked to collectors and determiners held within, "Taxonomic utility of niche models in validating species concepts: A case study in Anthophora (Heliophila) (Hymenoptera: Apidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/1363c785-b3e0-4322-9283-a6d272748735">https://bionomia.net/dataset/1363c785-b3e0-4322-9283-a6d272748735</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/1363c785-b3e0-4322-9283-a6d272748735">https://gbif.org/dataset/1363c785-b3e0-4322-9283-a6d272748735</a>. Formatted as a Frictionless Data package
Meßtechnische Leistungskriterien für Industrieroboter: Verläßlichkeit des Standards ISO 9283
No full textS.122-132Mit dem hier vorgestellten System ist es nach Ansicht der Autoren erstmals möglich, standardisiert Genauigkeitskenngrößen von Industrierobotern zu bestimmen. Das System arbeitet vollautomatisiert, d.h., die IR-Programmerzeugung für die Prüfposen, die Durchführung der Testreihen und die Auswertung der Meßergebnisse zur Erstellung des Prüfberichts gemäß ISO 9283 erfolgen ohne manuellen Eingriff. Das Verfahren ist aufgrund der Portabilität des Meßsystems flexibel einsetzbar - z.B. in der Qualitätskontrolle beim Hersteller oder auch zu Diagnosezwecken beim Anwender von Industrierobotern.61Nr.
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
Verification of Motoman MH5 robot characteristics by following the ISO 9283 standard
Full text linkV magistrskem delu preverjamo značilnosti (v nadaljevanju karakteristike) robota Motoman MH5 po veljavnem mednarodnem standardu ISO 9283. Za izvedbo meritev smo izdelali merilni protokol meritev. Preučili smo mednarodni standard, na podlagi katerega smo izbrali merilno opremo, izdelali mehansko nazivno obremenitev robota in pripravili robotske programe.
V uvodnem delu magistrskega dela sta podrobneje predstavljena mednarodni standard ISO 9283:1998 in tehnično poročilo ISO/TR 13309, ki z opisom merilnih metod dopolnjuje standard. Predstavljene so tudi definicije osnovnih pojmov: točnosti, ponovljivosti in ločljivosti robota.
V drugem delu smo opisali uporabljeno metodologijo za preverjanje robotov. Predstavitev zajema opis robota Motoman MH5 in robotskega krmilnika, mehanske nazivne obremenitve robota, simulacijsko okolje MotoSim in predstavitev izbrane merilne opreme Optotrak Certus. Opisano je tudi merilno okolje, ki obsega postavitev merilnih kamer, namestitev merilnih (IR) diod oziroma markerjev na breme in postopek preračuna skupnega koordinatnega sistema.
V tretjem delu so predstavljene vse značilne karakteristike lege in poti robota Motoman MH5. Za vsako posamezno karakteristiko robota so prikazani njen izračun, opis merilnega protokola in izmerjeni rezultati. V razpravi poglavja 3.3 povzamemo skupne lastnosti in ugotovitve rezultatov meritev.The characteristics of the Motoman MH5 robot were investigated according to the applicable international standard ISO 9283. A validation protocol was prepared for the measurements. The international standard was studied to determine suitable measuring equipment, prepare a mechanical nominal load of the robot and write robotic programs.
In the introductory part, the international standard ISO 9283: 1998 and the technical report ISO/TR 13309 are presented in more detail, which supplement the standard with the description of the measurement methods. Definitions of basic concepts are also presented: the accuracy, repeatability and resolution of the robot.
Detailed in the second section is the methodology used for verifying robots. The second section is comprised of the description of the Motoman MH5 robot and the robot controller, the mechanical nominal load of the robot, the MotoSim simulation environment and the presentation of the selected Optotrak Certus measuring equipment. The measuring environment is also described, which includes the layout of measuring cameras, the installation of measurement (IR) diodes and markers and the process of converting a common coordinate system.
In section three, the typical characteristics of the pose and trajectories of the Motoman MH5 robot are examined. Presented for each robot characteristic is its calculation, the description of the measurement protocol and the measured results. A summary of the discussion in chapter 3.3 is made including the common properties and findings of the results of the measurements
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