The Case for an Adaptive Integration Framework for Data Aggregation/Dissemination in Service-Oriented Architectures

Abstract The migration to Service Oriented Architectures (SOA

Large Payload Transportation and Test Considerations

No abstract availabl

Spaceport Concept in Germany

DLR and partners have conducted a study to establish a spaceport in Germany. This study includes topics as the market situation/demand/viability, safety and security for the integration of operations into the airspace, the necessary licensing, the operational requirements, as well as the regulatory framework

Performance Testing of Aero-Naut CAMFolding Propellers

The increase in popularity of unmanned aerial vehicles (UAVs) has been driven by their use in civilian, education, government, and military applications. However, limited on-board energy storage significantly limits flight time and ultimately usability. The propulsion system plays a critical part in the overall energy consumption of the UAV; therefore, it is necessary to determine the most optimal combination of possible propulsion system components for a given mission profile, i.e. propellers, motors, and electronic speed controllers (ESC). Hundreds of options are available for the different components with little performance specifications available for most of them. By examining a variety of existing long-endurance aircraft, Aero-Naut CAM carbon folding propellers were identified as the most commonly used type of commercial-off-the-shelf propeller. However, no performance data exist in the open literature for the Aero-Naut CAM carbon folding propellers. This paper describes the performance testing of 40 Aero-Naut CAM carbon propellers in 2-blade configuration with diameters of 9 to 16 in with various pitch values. The propellers were tested at rotation rates of 3,000 to 7,000 RPM and advancing flows of 8 to 80 ft/s, depending on the propeller and testing equipment limitations. Results are presented for the 40 propellers tested under static and advancing flow conditions with several key observations being discussed. The data produced will be available for download on the UIUC Propeller Data Site and on the Unmanned Aerial Vehicle Database

Students’ satisfaction and teaching efficiency of university offer

This study analyses the factors affecting students’ satisfaction with university experience, focusing on the aspects characterising the teaching efficiency of educational offer. For this purpose, organisation of teaching activities, available information, teaching materials, and other facilities offered to students to make their learning experience more successful, are considered as indicators of teaching efficiency. Our interest in this topic is justified by the importance that students’ satisfaction assumes, not only as indicator of the quality of educational services but also for its relationship with overall life satisfaction and subjective well-being. A structural equation model with latent variables is estimated by using survey and administrative data of the University of Pisa. Main findings seem to show that teaching efficiency has a positive effect on satisfaction and suggest that whenever it is inadequate, or at least, considered as such, students are less satisfied for their university experience. The effects of other factors on students’ satisfaction such as studies organisation, social capital and internship experience are also discussed

Building the layers of a manufacturing taxonomy: how 3D printing is creating a new landscape of production eco-systems and competitive dynamics

Recent innovations in 3D printing technologies and processes have influenced how products are designed, built and delivered. However, there is a significant gap in our knowledge of how 3D printing is impacting on manufacturing eco-systems and competitive dynamics in different industries and contexts. Basing our analysis on systematic review of organisations, we develop a taxonomy capable of explaining the many areas the technology can impact. We based our taxonomy on Pavitt’s identification of industry types, but extended this with Castellacci’s more recent service-manufacturing sectors which includes external sources and more open business models (Castellacci, 2008; Pavitt, 1984). We populate the model with cases and industry exemplars showing the wide extent of the applications of 3D printing within the different sectors, the novel disruption happening in existing market structures, and the implications for both firms and their customers. In addition to offering a comprehensive framework for plotting and comparing the impact of 3D printing, we emphasise the role of users in co-creation and personalisation and how this varies according to the level of use of 3D printing at different stages between end products and various types of manufacturing rstrategies. While 3D printing has been touted as disruptive, we suggest that a new taxonomy offers an additional understanding to appreciate the ways firms can operate in a 3D printing context