1,721,194 research outputs found
Dynamic pressures in sloshing phenomena: a comparison between full scale measurements and numerical calculations
No full textThe loads due to internal fluid motions are believed to be cause of severe damages occurring
on the walls of tanks on board. Even if a general description of sloshing loads in terms of
dynamic and impact pressures on the walls is available, a quantification of such pressures in
large scale is still difficult.
This paper reports the results of an experimental campaign on board of a ship during a voyage
between Italy and South Africa.
The results of the surveys performed by means of pressure transducers placed on the tank
walls and of strain gauges in a close position are presented together with ship motions surveys
obtained by means of a gyro-platform. Additional acceleration transducer are also placed on
the weather deck.
Such results, together with those available from a previous, analogous, campaign, allow to
state actual values of sloshing loads (peak value and duration) for both dynamic and impact
pressures and to relate them to ship motions
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
Cacopsylla melanoneura vettore degli scopazzi del melo
No full textLe ricerche svolte in Trentino hanno rivalutato il ruolo di Cacopsylla melanoneura nella trasmissione degli scopazzi, evidenziando una elevata capacità
della psilla nel trasmettere la fitoplasmosi a meli sani già da febbraio, quando gli adulti svernanti infetti migrano nel frutteto. Il periodo più critico si colloca tra fine febbraio e marzo, che corrisponde al picco di presenza della popolazione svernante. Per questo è necessario impostare strategie di difesa volte a contenere il vettore già dallo stadio fenologico di rottura delle gemme. Al fine di scegliere il momento ottimale per intervenire, quindi, è necessario sapere quando le psille entrano nel meleto, motivo per cui è stato costituito e testato un indice di immigrazione rivelatosi di buona/ottima capacità di precision
Towards a new frontier in wrist rehabilitation: The traction-free posture orthosis
Full text linkThis study presents the novel Traction-Free Posture Orthosis, designed to address wrist stiffness without the use of traditional traction methods. The orthosis employs a velcro system to stabilize the position of the wrist in flexion or extension, thereby avoiding the compression and rotational disadvantages associated with non-perpendicular traction forces. Triangular-shaped cuts in the brace allow for plastic material flexibility, ensuring movement and comfort. Significant is the absence of a traction strap, which traditionally reduces the support surface and could create pressure points leading to patient discomfort or treatment rejection. The design facilitates a wide contact surface with the hand, optimal load distribution, and the capacity to adjust dual traction straps independently, adapting to the natural wrist movement. This single-piece base orthosis offers a stable, cost-effective, and patient-friendly alternative to conventional splints. However, patients with stiffness in both flexion and extension may require two separate orthoses, potentially increasing costs and patient inconvenience. Overall, the Traction-Free Posture Orthosis represents an innovative step in wrist rehabilitation, providing a quick-to-construct, easy-to-wear solution with the promise of enhanced patient compliance and comfort
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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