1,720,959 research outputs found
Effect of Niche-Tunnel Face Distance and Excavation Time in Tunnel Construction
Get PDFEstimated time and costs of construction are one of the most important factors influencing the decision whether and how a tunnel is to be built. Underground excavation works carry a lot of uncertainties that effect the time and cost of tunnel construction so it is essential to make the decisions based on the past best experiences. This study has analyzed the time needed to load the muck in truck, measured in 89 tunnel faces which have different distance from tunnel face to nearest niche, measurements are done in excavation phase of 10.245,00 meters of tunnels which have different diameters varying from 4,20 to 9,40 m. Results indicate that the best distance between tunnel face and niche increase linearly the time of excavation from 0 to 200 meters and exponentially for distances longer than 200 m. It is concluded that in small and medium diameter tunnels the optimal excavation time is achieved when distance from niche and tunnel face is not longer than 200 meters
MOVING THE CENTER: THE RELATIONSHIP OF URBAN PLANNING, ARCHITECTURE AND CIVIL ENGINEERING PROJECTS WITH THEIR BENEFICIARY
No full textTerms such as quality deviations, non-conformances, defects, quality failures, over budget
and behind schedule are quite frequent in urban planning, architecture and civil engineering projects. The effort to analyze the parameters affecting quality, budget, schedule and functionality failure and/or diversion in construction industry is extensive. Nevertheless, the number of construction projects that have functional deficiencies minimally in one of their complementary elements is significant. The main reasons behind these deficiencies are
considered to be the lack of experience, ineffective interaction of clients-consultantscontractors and corruption. This article attempts to shed light to another reason why
construction projects fail to fulfill some of their main functional parameters, emphasizing
that this is caused by an inconsiderate approach of the ones in charge of planning and
building structures to their beneficiaries. In other words, urban planners, architects and civil
engineers approach the structure in hand as “the center of the world”. This is somehow
reflected in the structure which tends to demonstrate an Othering attitude, similar to that of
the (former) colonizer to the (formerly) colonized, to their surroundings and beneficiaries
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
The Effect of Concrete Sample Size in the Compressive Strength Value of Concrete
Get PDFConcrete is one of the most widely used construction materials. Compressive strength is one of the most important properties of hardened concrete. Different codes use different standards to define the characteristic strength. Albania nowadays is adapting the EN standards, but previously it used to apply the local code KTP. According to KTP standards the concrete samples were cubic specimens of 200mm side length. This study is an attempt to analyse the relation between sample size and compressive strength values of concrete specimens. For this purpose, 4 concrete classes of C8/10, C16/20, C20/25, C30/37 and 5 different cubic sizes of 50, 100, 150, 200, 250mm side length were investigated. The samples were taken according to EN 206-1. Six samples were tested for the determination of the compressive strength value of each class/size combination. According to the compressive strength test results the values increase as the size increases up to 150mm, but as the cube size continues to increase the compressive strength values decrease gradually
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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