1,720,991 research outputs found
THE ADAPTER AND SEPARATION SYSTEMS SERIES FOR THE VEGA LAUNCH VEHICLE
No full textThe VEGA Maiden Flight represented an important milestones for the ALMASat-1 program. In that frame, ALMASpace has been in charge of the design, manufacturing, testing and qualification for launch of the ALMASat-1 ADapter and Separation System (AD-SS), retaining the spacecraft during the early launch phases and providing the S/C separation when the separation command was received from the on-board avionics.
The ALMASpace AD-SS has been sized and qualified for the launch according to the VEGA requirements, therefore being hitherto the real benchmark for future missions onboard the VEGA flights for satellites up to 35 kg.
In order to extend the AD-SS capabilities to larger spacecraft, ESA has undertaken an activity aimed at the development and qualification of a wider series of products, achieving the goal of supporting satellites missions up to 200 kg, thanks to an overall set of three different AD-SS models.
This paper presents the improvements and the results of the design phases, started in late 2011, aimed at the completion of the second model of ALMASpace AD-SS and its delivery to ESA for the integration on the next VERTA-1 mission, currently scheduled in early 2013
Strengthening of different types of slabs with Composite-Reinforced Mortars (CRM)
Get PDFA great number of buildings built in Europe in the second half of the last century are currently in need of strengthening and retrofitting. One of the more frequent issues is the weakness of the slabs and, in particular, of the intrados covering layer (usually a plaster) and/or of the clay non-structural elements employed to decrease the overall slab weight. The application of composite-reinforced mortar (CRM) systems represents a fast and easy solution to address these weaknesses. Therefore, they are particularly attractive for applications in school buildings, to avoid long interruptions of the educational activities. In this paper, the use of CRM to strengthen different types of slabs is described and discussed on the basis of the results obtained from an experimental campaign conducted at the Politecnico di Milano
"A factory for a future": Iveruno new school
No full textHere, school is intended as a relational space open to the territory and designed to host public activities accessible to the entire urban community. The new school of Inveruno is, in this sense, the new civic center of the city, a representative building and a place of cultural integration. The school is designed to offer flexible and permeable spaces where innovative education becomes the key principle to provide students with adequate skills. Therefore, the school offers in equal measure individual spaces for education and study, spaces for exploration where students may experiment and as a group practice the skills they have acquired, and group spaces where they may present and discuss the results of their work with the school and city community. Just as important are the open space between the buildings and the central square designed to host open-air events that involve the entire school community
Use of Predictive Analyses for BIM-Based Space Quality Optimization: A Case Study, Progetto Iscol@
Get PDFGoing 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
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