1,721,018 research outputs found
Submarine channel initiation, filling and maintenance from sea‐floor geomorphology and morphodynamic modelling of cyclic steps
No full textDesign and Optimisation of Mechanical Solution for high speed components in packaging machines
No full textIn the 1980’s a small artisan company starts to produces robot for packaging, equipped with rechargeable batteries and a feeler, which turned autonomously around pallets of any size, applying stretch film to stabilize the load. This innovative idea was later patented and widespread all over the world. Soon the company became well known as a world leader in semi–automatic machines for the application of stretch film for stabilizing pallet loads, developing a number of other machines to join the robot including: rotating tables, horizontal wrapping
machines for elongated products, a ranges of shrink film packaging machines and taping machines. These automatic systems and machines are able to stabilize pallet loads with stretch film capable of catering for up to 100 pallets per hour, thanks to a range of high-tech
solutions with excellent levels of productivity. The commercial success for every packaging machine is directly related to a correct balance
between costs of equipments (as low as we can) and efficiency in processes (as high as it is possible). Regarding this second aspect, during the last years, the sector noticed a progression of technical solutions toward faster and faster machines. From an engineering point of view, one of the simplest way to speed up a machine is to take particular care to reduce inertial masses. This result can be obtaining modifying geometry or changing the material. This study is focused on the redesign and the optimisation of a pretension roller for the
stretching of elastic film and the deposition on pallet. The pretension roller is a fundamental component inside the semi-automatic packaging
machine permitting, coupled with other rollers, to accurately calibrate the ratio of stretching for the elastic film (reducing wastes of film), but also the wrapping up pressure on the pack (assuring the stability of pallet and the integrity of goods during the packaging process). Linear and non linear FEM analysis were used together with a theoretical modelling of physical conditions for the pretension roller. The hypothesis to substitute steel with aluminium was considered and accepted. A reduction in thinness and new solutions to guarantee the same level of
friction on surface were taken in count
Cyclic steps and related supercritical bedforms: Building blocks of deep-water depositional systems, western North America
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Channel formation by flow stripping: large-scale scour features along the Monterey East Channel and their relation to sediment waves
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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
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