1,720,955 research outputs found
Finite Element Modelling and Analysis of Low-Velocity Impact Behaviour in CFRP Panel
No full textThis article presents the development of a finite element model (FEM) to simulate low-velocity impact (LVI) tests on composite structures made of carbon fiber-reinforced polymers (CFRP). The analysis incorporates the modelling of key failure mechanisms in CFRP, addressing both intra-laminar and inter-laminar damage. The simulations aim to predict the coupon impact behavior across varying energy levels, significantly reducing the experimental costs and time required for material characterization. The results demonstrated the model capability to accurately simulate the LVI response, providing insights into distinct failure mechanisms at different impact energy levels. This study underscores the value of FEM-based simulations in creating efficient and reliable methodologies for evaluating the structural integrity of high-performance components
Numerical Simulation of Crashworthiness and Occupant Restraint System of a Rollover Tractor
No full textSafety in agriculture is a crucial aspect to consider. The ultimate goal of safety in agriculture is to create a safe working environment and ensure the integrity of the food supply chain that provides resources for all. Modern agriculture depends heavily on heavy machinery, which increases the efficiency of many agricultural procedures. Unfortunately, tractors, cultivators, and power tools pose a serious hazard, as evidenced by numbers reported by the US Bureau of Labor Statistics, where 146 people were fatally injured while working with or near tractors in 2018 alone. This study aims to analyze one of the most critical phenomena involving tractor occupants: rollover. By conducting an explicit finite element analysis (FEA) of a rollover test of a generic T5 tractor, the aim is to evaluate the biomechanical performance of the occupant focusing on the interaction between the occupant and the interior of the vehicle. Biomechanical parameters will be studied and compared with different case studies that may be useful for a better understanding of the situation. In particular, a case study with an unbelted dummy and another case study where the dummy has a seat belt will be analyzed. The innovation of this study is to compare the previous case studies with another case study. This is the introduction of an airbag placed on the side pillar of the tractor cab, which will contribute significantly to the reduction of fatal accidents
Numerical Analysis Techniques for Studying the Structural Strength of a Vehicle in Terms of Absorbed Energy
No full text
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
- …
