1,720,958 research outputs found
A new method for mapping and modelling buried faults within the Auckland Region, using gravity and borehole data
No full textFull text is available to authenticated members of The University of Auckland only.Limited data is currently available on the presence and extent of buried faults within the Auckland region. This thesis presents a method for mapping and modelling buried and obscured faults using geological and geophysical data. The method integrates borehole and surface lithological data, informed by gravity survey data in a 3D modelling software to produce high-resolution models from which fault location and geometry can be derived. This method is trialled on the Waikopua North Fault, selected from the buried faults proposed in previous studies. Located just to the west of the Auckland suburb of Beachlands, the Waikopua North Fault exhibits variable surface expression and was previously thought to be a minor fault structure, with offset of less than 50 m in the Waipapa Group basement. The high resolution, integrated geological models derived in this study confirms the existence of the Waikopua North Fault as a northward continuation of the Wairoa-Waikopua Fault Complex. The integrated model (Model 4) indicates the presence of a complex zone of normal faulting, with a variable dip angle of between 40oW and 70oW, and combined offsets of up to 200 m within the Waipapa Group basement. The fault represents a potential land stability hazard in an area of increasing urban development and should be further investigated to this end. This method, though not without uncertainty, is proven to be applicable to the task of identifying and mapping buried faults in the case study area, and future work could apply the method throughout the Auckland region
Landslides and surface fault rupture from the Mw 7.8 2016 Kaikōura Earthquake
No full textLarge volume (>106 m3) earthquake-induced landslides (EILs) are a hazard that can result in both catastrophic damage to the natural and built environment, and the loss of human life. However, EILs are not well studied and there is a limited understanding of controls on the exact triggering mechanisms. The interaction between site controls and the seismological characteristics of the triggering earthquake are of particular interest, because understanding these can help to refine EIL risk and susceptibility models, which at present are inadequate to predict the occurrence of large EILs. The Mw 7.8 2016 Kaikoura Earthquake, New Zealand, provides a unique opportunity to study the site and seismological factors that contribute to failure of large EILs. Herein, I present the results of field, remote sensing, and 3D modelling studies of the four largest EILs triggered by the Mw 7.8 2016 Kaikoura Earthquake.
No one single factor was found to control the initiation of failure or the observed distribution of large volume EILs. Indeed, it was the complex interaction of multiple factors that initiated failure. It was found that active faults form site conditions that are conducive to the initiation of large volume EILs. The presence of an active fault through the source area, and the dynamic component of near-fault, pulse-like ground motions were more important for triggering large landslides during the Kaikōura Earthquake, than the magnitude of permanent displacement associated with fault surface rupture. No correlation between the magnitude of fault surface rupture and the magnitude of slope failure was observed. Historic instability at the sites was found to be an important control on large EIL occurrence for the Kaikoura Earthquake. Kinematic feasibility of defects was found to be less important when extreme dynamic loads are considered, and this has implications for site assessments. Volumes for the four study sites were estimated using 3D modelling and were found not to fit with commonly used lanThis research has defined how site controls interacted with fault surface rupture and ground shaking to initiate large volume landslides during the Mw 7.8 Kaikoura Earthquake. The controls defined here were found to be non-unique and should be used for future hazard/risk modelling and site assessment.dslide area-volume scaling relationships
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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