Experimental investigation of the fluid dynamic behavior over a sphere and an icosahedron under extremely low Reynolds number conditions

openIn recent investigations a new kind of instability has been discovered. This instability takes place on spherical beacons placed on the guard cables of the electrical power lines, consisting in instability intermittency states on the aerodynamic lateral force. The before mentioned investigation showed that both the sphere with and without cable exhibit intermittency states. Its behavior is determined by the asymmetry on the boundary layer separation line on the body and is completely random since the sphere is a revolution body with no favored direction. The aim of this work is to investigate the fluid dynamics of a sphere and an icosahedron at low Reynolds numbers using a water tunnel, to establish a comparison between the wake vortexes of a revolution bluff body and a bluff body with sharp edges. Specifically, photos were taken to observe the flow evolution using ink. This technique was employed to assess the system instability, and to measure the dimension and shape of the wake behind this bluff body. The initial part of the work focused on designing and 3D printing the two geometries. Once completed, the test campaign commenced in the water tunnel, examining the effect of varying the Reynolds numbers. The results obtained from these experiments contribute to understanding flow dynamics in the presence of different geometries and comparing curve bodies with sharp edges bodies behavior. Some conclusions and future jobs will be defined.In recent investigations a new kind of instability has been discovered. This instability takes place on spherical beacons placed on the guard cables of the electrical power lines, consisting in instability intermittency states on the aerodynamic lateral force. The before mentioned investigation showed that both the sphere with and without cable exhibit intermittency states. Its behavior is determined by the asymmetry on the boundary layer separation line on the body and is completely random since the sphere is a revolution body with no favored direction. The aim of this work is to investigate the fluid dynamics of a sphere and an icosahedron at low Reynolds numbers using a water tunnel, to establish a comparison between the wake vortexes of a revolution bluff body and a bluff body with sharp edges. Specifically, photos were taken to observe the flow evolution using ink. This technique was employed to assess the system instability, and to measure the dimension and shape of the wake behind this bluff body. The initial part of the work focused on designing and 3D printing the two geometries. Once completed, the test campaign commenced in the water tunnel, examining the effect of varying the Reynolds numbers. The results obtained from these experiments contribute to understanding flow dynamics in the presence of different geometries and comparing curve bodies with sharp edges bodies behavior. Some conclusions and future jobs will be defined

Hollow resorbable fiber for combined light and drug delivery: fiber development and analysis of release kinetics

A hollow bioresorbable phosphate glass fiber was developed and used for drug and light delivery. The interaction between organic molecules and the fiber’s internal surface was studied. Promising results for the release of Rose Bengal were obtained

Il professionista riflessivo: apprendere dalla pratica professionale

Il professionista pu\uf2 arrivare a comprendere che la realizzazione di s\ue9 passa attraverso l\u2019esercizio e l\u2019interpretazione della propria professione. Il riconoscimento del legame tra lavoro e vita reale pu\uf2 spiegare da dove pu\uf2 scaturire la forza per dare una motivazione di senso a favore di ci\uf2 che fa, delle persone per cui lavora e dell\u2019ambiente che vuole contribuire a trasformare

L'Épigravettien à l'épreuve des faits, une approche systémique

L’Épigravettien a été défini dans les années 1960 pour rendre compte de l’originalité des industries lithiques postérieures au Gravettien en Italie. L’extension progressive de cette entité à une grande partie de l’Europe méditerranéenne et orientale s’est également appuyée essentiellement sur les industries lithiques. Au cours des dernières d´ecennies, le développement de l’approche technologique dans l’étude des industries lithiques, associé à une meilleure prise en compte des contextes archéologiques et des séquences stratigraphiques, a fortement renouvelé la perception de l’Épigravettien, de sa sériation et de son emprise chrono-géographique. Dans plusieurs régions, des travaux portant sur les transferts lithiques documentent des r´eseaux de d´eplacement et de contact s’établissant à différentes échelles. En parallèle, les recherches portant sur d’autres domaines techniques et culturels ont considérablement progress´e au cours des dernières décennies et ont concerné des matériaux variés (parures, faunes, art pari´etal et mobilier, sépultures...). Pourtant, ces recherches ont été généralement menées à l’intérieur du cadre fixé par les industries lithiques et n’ont que rarement conduit à une rediscussion de ce dernier. Dans cette communication, nous proposons une première tentative de synthèse des données acquises et nous tentons de poser les bases d’un dialogue non hiérarchisé entre ces différents domaines de la culture matérielle. Cette position nous conduit à éprouver d’abord la consistance de l’entité épigravettienne en dehors des seules pratiques techniques lithiques et à évaluer les recouvrements et les écarts existant entre les séquences de changements identifiés au sein des différentes composantes des systèmes techniques. Cette discussion est menée en s’appuyant d’abord sur un noyau de connaissances établies autour de deux grands domaines géographiques: le nord-est de l’Italie et l’arc liguro-proven¸cal. Nous élargissons ensuite la réflexion vers le sud et vers l’est. Chronologiquement, notre propos embrasse la durée de l’´Epigravettien (entre ca. 20 ka cal. BP et 11,5 ka cal. BP), mais se concentrera sur certains épisodes critiques ou des changements forts sont perceptibles dans les pratiques culturelles de populations épigravettiennes

L’APP Mind Inclusion: la tecnologia assistiva per promuovere l’inclusione sociale delle persone con disabilità intelletive nella loro comunità

Information and Communication Technologies have been widely used to enhance evidencebased interventions in the education and training of individuals with intellectual disabilities. The use of Information and Communication Technologies for these purposes is called Assistive Technology. Assistive technology is able to support persons with intellectual disabilities to live fuller and richer lives in their communities, supporting more successful functioning across multiple domains: independent living and inclusion in community.This study has the aim to present and explain the development of an assistive technology tool for persons with intellectual disabilities, the Mind Inclusion APP which can allow persons with intellectual disabilities to search and reach for a location or an activity in their community. The APP was co-created through the support of a participatory design and a person centred approach.A sample of 48 people, including persons with disabilities, caregivers, educators and business owners, was involved at all stages of the project. This study has shown that persons with disabilities can interact better, be part of their society more easily, and learn new skills reducing the impact of disability on daily functioning by using the Mind Inclusion APP

Accesible co-creation tools for people with intellectual disabilities: working for and with end-users

[EN] In a world defined by rapid change, the search for solutions to societal challenges has become more complex calling for new paradigms of innovation focused on collaborations with the community and users. Cocreation approaches in the design and production of a service or product can bring low-cost innovation and unique and personalized customer experiences leading to user acceptance of a product or service. Under a co-creation perspective, the participatory approach developed in the MINDInclusion project aims to improve the inclusion of people with intellectual disabilities into public places and society by using a co-created online tool based on personal experiences of people with disabilities. Paying special attention to the Design thinking method, the main goal of this experience was to co-create cognitive accessible design tools that guide the collection of users and other stakeholders experiences in the process of defining problems and solutions. To this end, 14 researchers and educators worked defining together a set of guiding exercises and design thinking methods for the 4 co-design cycles. As a result two tools were developed to gather information to recreate as a final output “personas scenarios”, an “empathy map” and expected “use scenarios”. The former was an adapted game board about public places based on the traditional monopoly game and the latter a diary with a set of activities that will facilitate the collection of contextual information. Previous experiences have shown that co-design process can promote greater social cohesion, acceptance and empowerment. Working with people with intellectual disability presents several challenges since the co-creation process needs to be cognitive accessible. However, the tools created under this experience can be extrapolated to other contextsAlmeida, R.; Losada Durán, R.; Cid Bartolomé, T.; Giaretta, A.; Segalina, A.; Bessegato, A.; Visentin, S.... (2020). Accesible co-creation tools for people with intellectual disabilities: working for and with end-users. Editorial Universitat Politècnica de València. 53-61. https://doi.org/10.4995/INN2019.2019.10086OCS536

NEW EARLY HOLOCENE SETTLEMENT IN CENTRAL ITALY: THE MESOLITHIC SITE OF CONTRADA PACE (MARCHE REGION)

Early Holocene hunter-gatherer settlements are spread throughout Italy and testify to the exploitation of very different landscapes. Nonetheless, their preservation state is not always exceptional. This is not the case for Contrada Pace, an archaeological site recently discovered on a terrace of the Chienti river in central-eastern Italy. This paper reports on the geomorphological, pedo-stratigraphic, and archaeological record of one of the most complete and well-preserved Early Mesolithic open-air sites in Italy and southern Europe. Micro-stratigraphic excavations extended over more than 500 square meters have exposed a buried paleosol with anthropogenic features, which contained thousand lithic artefacts and organic remains framed in the context of a primary forest. These findings appear clustered in different functional areas that yielded multiple structured features. The field evidence integrated by radiocarbon dating and archaeobotanical, archaeomalacological and zooarchaeological data allowed to propose a first interpretation of the general structure of the site and the most significant featuresThe archaeological excavation of the site was carried out by ArcheoLAB (Macerata, Italy) in the framework of construction activities promoted by the Province of Macerata and the Municipality of Tolentino. DV has received funding from the European Union's Horizon 2020 research and innovation programme (Grant Agreement number: 886476 - LiMPH - H2020-MSCA-IF-2019). The archaeobotanical study and 14C dates were funded by the European Research Council (ERC) as part of the Research and Innovation program of the European Community Horizon 2020 (HIDDEN FOODS no.639286 to EC)