1,723,338 research outputs found
Ascopolyporus tibetensis F. M. Yu, Q. Zhao & T. Luangharn
No full text<i>Ascopolyporus tibetensis</i> F.M. Yu, Q. Zhao & T. Luangharn <p> <b>Host:</b> On the living stem of bamboo</p> <p> <b>Distribution:</b> China (Tibet)</p>Published as part of <i>Yu, Feng-Ming, Wei, De-Ping, Zhao, Qi, Tang, Song-Ming & Luangharn, Thatsanee, 2023, Ascopolyporus tibetensis (Cordycipitaceae, Hypocreales): a new species from Tibet, China, pp. 88-98 in Phytotaxa 592 (2)</i> on page 95, DOI: 10.11646/phytotaxa.592.2.2, <a href="http://zenodo.org/record/7840405">http://zenodo.org/record/7840405</a>
Dislocation plasticity reigns in a traditional twinning-induced plasticity steel by in situ observation
No full textTo twin or not to twin? The critical doubt emerges recently on the dominant role of deformation twinning in contributing to strain hardening and plasticity, which has been long taken for granted specifically in twinning-induced plasticity (TWIP) steels. Here, the dynamic deformation process was in situ studied in a typical Fe-30Mn-3Si-3Al (wt. %) TWIP steel by using transmission electron microscopy. It is found that dislocation activities, instead of twinning, reigns over the whole plastic process, including planar slips and especially cross-slips of dislocations, leading to strong interaction of dislocations. An unexpected generation of nanograins is visible because of dislocation activities ahead of the crack tip. Moreover, the dominant dislocation plasticity continues straight down to cryogenic temperatures. The present results evidence the key role of forest dislocation hardening and shed insights into deformation physics in TWIP steels, contrary to our conventional understanding. (c) 2018 The Authors. Published by Elsevier Ltd
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
A Broadband Frequency-Selective Rasorber with Double-Sided Absorption Bands
No full textA broadband Frequency Selective Rasorber (FSR) with 2.5D FSS structure is proposed. The proposed FSR presents a wideband transmission window between two absorption bands. The FSR consists of a lossless periodic surface and a lossy periodic surface separated by an air layer. The lossy surface is realized by inserting a strip-type Parallel LC (P-LC) of via structure into the center of a dipole loaded with lumped-resistors. The lossless layer is a broadband bandpass frequency selective surface (FSS) consisting of two metal patches surfaces and separated by a thin layer. An equivalent circuit model (ECM) is proposed to analyze operating principle of the FSR. The fractional bandwidth for reflection less than -10 dB is about 70% and a transmission bandwidth with insertion loss of -3 dB is about 22%. The FSR perform stable frequency response from 0 to 30 degrees
Guest Editor's Introduction: Special Section on Reliability-Aware Design and Analysis Methods for Digital Systems: From Gate to System Level
Full text linkThe fourteen articles in this special section represent world-leading current research into reliability-aware design methods for digital systems and provide interesting and valuable insights into current and future trends in the considered research areas. The focus on these articles is on investigating novel solutions for the reliability-aware design and analysis in digital systems, comprising a large number of issues and aspects (e.g. fault tolerance techniques, circuit aging and security), focusing on various architectures and devices (such as combinatorial circuits, memories, NoCs or FPGAs), and acting at different levels of abstraction (from circuit level to system level)
Frequency and time-domain analysis of partial discharge measurements in PWM inverter-fed induction motors
No full textThis work presents a new PD (partial discharge) measuring system for inverter-fed motors based on a bridge circuit topology. The bridge circuit was adopted in the measuring system for picking up PD signal and suppressing interference. The experimental results show that it is possible to detect and record PD notwithstanding the large interference due to inverter commutations if measuring frequencies are selected adequatel
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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