1,720,998 research outputs found
An integrated micro-computer based qualitative and quantitative superstructure rating system for highway RCDG bridges
No full textAn integrated micro-computer based qualitative and quantitative superstructure rating system for highway bridges is developed. The purpose of this developed Windows-based software is to evaluate the qualitative condition of the components including the overall condition and to determine the strength of the bridge superstructure. A new approach is introduced in the qualitative condition rating. These improvements are the following: a criteria for quantifying and determining the condition of the various superstructure component, an importance factor for each component under various deterioration degree and a weighed average technique combining the rating of each component with its structural importance to determine the overall rating of the bridge. In the quantitative rating method, the Load and Resistance Factor Method is used instead of the operating and inventory rating.The software consists of three major modules: Bridge Inventory and Data module, qualitative and quantitative module and the on-line help module. These modules interact to perform an integrated superstructure bridge rating system
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
Managing the risks of a wind farm in typhoon-prone areas
No full textThe paper first ascertains the increase in buckling failure risk of a wind turbine due to typhoons. This condition necessitates a study of an efficient way of managing the risks in order to avoid financial ruin. Consequently the authors proposed methods for managing typhoons risk for existing and proposed wind farms. For the former, we explore the option of transferring the added risk to insurance. In this case, an optimum insurance premium is determined. For the latter, the risk is mitigated, by increasing the thickness of the tower. The optimum thickness is determined considering the projects\u27 net present value and the internal rate of return
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
WARP^2: Wind assessment of roofs to pullout & pullover for priority cultural heritage structures in the Philippines
Get PDFCultural tourism is one of the priority sectors by which the Government of the Philippines aims to foster inclusive and sustainable socio-economic development, due to its potential for job creation. Filipino cultural heritage (CH) assets are particularly vulnerable to natural hazards (e.g., earthquake ground shaking, strong wind, and flooding) due to their age and type of construction. In particular, non-engineered CH roofs have been recognized as the most vulnerable component in the building envelope due to typhoon-induced wind uplift. Consequently, they may cause large amount of economic loss and disruption to CH assets. This paper introduces a simulation-based approach for non-engineered CH roof fragility derivation, i.e., to assess the probability of different levels of damage experienced by CH roofs over a range of wind hazard intensities. In this approach, two limit states are considered, corresponding to roof-panel pullout and pullover failure modes. An illustrative application of the proposed procedure is finally presented with reference to 17 priority CH buildings across the Philippines
Estimating the limit state exceeding probability of a deteriorating structure using the Kalman filter, extended Kalman filter, unscented Kalman filter and the sequential Monte Carlo simulation
No full textThis paper focuses on determining the limit state exceeding probability of a deteriorating model using optimal and sub-optimal Bayesian algorithms. Specifically the Kalman filter (for a linear system), extended Kalman filter, unscented Kalman filter and the sequential Monte Carlo simulation (for non-linear systems) are used to approximate the present state of a deteriorating system given measurements tainted with noise of the system output. In addition to the comprehensive discussion of the theory, numerical implementation and comparison of the results through numerical examples are shown
Performance-based design of a wind turbine under typhoon and earthquake loads
No full textTwo extreme load levels, Levels 1 and 2, for typhoons and earthquakes were considered in the performance-based design of a wind turbine. The failure modes considered are tower buckling failure, anchor bolt pull-out and soil bearing capacity failure. For each load case the probabilities of failure for three damage states (minor, moderate and major) were analyzed. The cost of strengthening and the failure costs were also obtained. Finally an optimal investment cost is proposed which is important for wind farm owners for capital budgeting purposes. This value also corresponds to a target probability of failure of a wind turbine which can be used in the design of wind turbines in typhoon and earthquake-prone areas
Structural strain estimates of a circular tunnel under seismic hazards
No full textThis paper presents an analytical approach to estimate 3-dimensional structural strains of a circular tunnel under an earthquake ground motion. Theoretical expressions including not only the axial and bending strains in the longitudinal direction but also the cross-sectional strains of a tunnel are developed in order to assess the current seismic design methods. Furthermore, the theoretical derivation of the soil and tunnel interaction effect can provide the analytical expression of soil spring modulus. Numerical results suggest that the cross-sectional tunnel strains are dependent upon the tunnel liner\u27s rigidity, so that the current design methods might overestimate the structural strains of the tunnel, especially having the liner\u27s hard rigidity for the Level 2 earthquake in Japan
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