2,076,371 research outputs found
Influence of oxide films on primary water stress corrosion cracking initiation of alloy 600
No full textIn the present study alloy 600 was tested in simulated pressurised water reactor (PWR) primary water, at 360 °C, under an hydrogen partial pressure of 30 kPa. These testing conditions correspond to the maximum sensitivity of alloy 600 to crack initiation. The resulting oxidised structures (corrosion scale and underlying metal) were characterised. A chromium rich oxide layer was revealed, the underlying metal being chromium depleted. In addition, analysis of the chemical composition of the metal close to the oxide scale had allowed to detect oxygen under the oxide scale and particularly in a triple grain boundary. Implication of such a finding on the crack initiation of alloy 600 is discussed. Significant diminution of the crack initiation time was observed for sample oxidised before stress corrosion tests. In view of these results, a mechanism for stress corrosion crack initiation of alloy 600 in PWR primary water was proposed
UCP 600 rules – changing letter of credit business for international traders?
No full textA letter of credit (L/C), in international trade may be described as an instrument of finance carrying a conditional guarantee of payment from the overseas (buyer’s) bank to the seller. Consequently, a L/C is desirable in high value and/or high risk transactions. The guarantee is conditional upon the seller complying 100% with the documentary requirements of the L/C, an issue of
particular concern to exporters, as the International Chamber of Commerce (ICC) estimates worldwide documentary discrepancy rates of 70%. L/C transactions are governed by ICC rules, and whilst these provide an international standardised process, the differing interpretations of what
constitutes documentary compliance create difficulties for sellers in particular. The new rules: UCP 600, supposedly have simpler and clearer wording, to reduce ambiguity and differences in interpretation, and hopefully reduce
documentary discrepancy rates and the associated financial risks. This article examines the major changes introduced by the UCP 600 and comments on their likely impact on future L/C business. Whilst acknowledging some improvements were introduced in the UCP 600, the article concludes that a number of issues have been ignored to the detriment of traders
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
Study of Inconel 600 (625) alloys for nuclear applications
No full textopenQuesto lavoro di tesi si propone di analizzare le proprietà, le applicazioni e i meccanismi di degrado delle leghe Inconel 600 (625) in ambito nucleare. Si analizzano con particolare attenzione la microstruttura, le proprietà meccaniche (resistenza a trazione, durezza, creep) e le proprietà chimico-fisiche (resistenza alla corrosione e all’ossidazione). Viene inoltre discusso il loro impiego nei reattori ad acqua pressurizzata (PWR) e ad acqua bollente (BWR), evidenziando i principali componenti realizzati con tali leghe. Infine, vengono discussi vantaggi, svantaggi e prospettive future.
Le leghe a base di nichel della famiglia Inconel rappresentano una classe di materiali ampiamente utilizzata nell'ingegneria nucleare, grazie alla loro resistenza meccanica, stabilità termica e ottima resistenza alla corrosione in ambienti critici. Tra queste, le leghe Inconel 600 (625) sono ampiamente utilizzate in componenti di impianti nucleari, dove le condizioni operative richiedono affidabilità a lungo termine sotto irradiazione, ad alte temperature e pressioni
600 Pavonia Ave in Jersey City
No full textThis 9 story office building is located on Pavonia Avenue between Summit and the Boulevard across from Mclaughlin Funeral home in Jersey City.Original file name 600 Pav.jpe
600 Pavonia Ave in Jersey City
No full textThis 9 story office building is located on Pavonia Avenue between Summit and the Boulevard across from Mclaughlin Funeral home in Jersey City.Original file name 600 Pav.jpe
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
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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