Search results for "Rust"
showing 10 items of 1659 documents
A new approach to the design of a speed-torque-controlled rubber V-belt variator
2005
This paper presents a new model for a torque-speed-sensing rubber V-belt variator. The actuators are of the centrifugal roller kind on the driver side and a helical torque cam plus a compression-torsion spring on the driven side. The equations permit designing the actuator geometry in order to keep the transmissible torque as close as possible to the torque request in the whole operative field. Moreover, a procedure is suggested for the most proper design of an automatic variator of this kind. It permits choosing the required variogram of the transmission, i.e. the matching between the engine and the transmission, and designing the actuators: roller mass, housing shape, contact plate angle…
A Simple Model for the Axial Thrust in V-Belt Drives
1996
Simple formulas can relate axial thrust and torque of rubber V-belt drives, taking into consideration the radial penetration of the belt.
Using human-values as a guide for understanding worthy design directions in augmented reality
2016
Augmented reality is a fast developing field, which will no doubt gain strong footing in the area of social media in the near future. Recently, Google Glass placed AR towards the top of the technological hype curve in regards to interaction possibilities, information overlay, information search and recording. Questions still remain however, regarding the added-value that AR offers to already existing interaction modes and technologies. In this study four concepts were designed and tested via video scenarios. The concepts related to three main product categories: educational tools; information presentation; and x-ray vision. The results positively reflected on the application of AR for educa…
Multi O- and S-isotopes as tracers of black crusts formation under volcanic and non-volcanic atmospheric conditions in Sicily (Italy)
2020
International audience; The deterioration of monument or building stone materials is mostly due to the growth of black crusts that cause blackening and disaggregation of the exposed surface. This study reports on new oxygen (δ17O, δ18O and Δ17O) and sulphur (δ33S, δ34S, δ36S, Δ33S and Δ36S) isotopic analyses of black crust sulphates formed on building stones in Sicily (Southern Italy). The measurements are used to identify the possible influence of volcanic emissions on black crust formation. Black crusts were mostly sampled on carbonate stone substrate in different locations subject to various sulphur emission sources (marine, anthropogenic and volcanic). Unlike atmospheric sulphate aeroso…
Contribution of raindrop impact to the change of soil physical properties and water erosion under semi-arid rainfalls
2017
Soil erosion by water is a three-phase process that consists of detachment of soil particles from the soil mass, transportation of detached particles either by raindrop impact or surface water flow, and sedimentation. Detachment by raindrops is a key component of the soil erosion process. However, little information is available on the role of raindrop impact on soil losses in the semi-arid regions where vegetation cover is often poor and does not protect the soil from rainfall. The objective of this study is to determine the contribution of raindrop impact to changes in soil physical properties and soil losses in a semiarid weakly-aggregated agricultural soil. Soil losses were measured und…
Equità canonica e diritto inglese
2010
Il lavoro si propone di analizzare il rapporto tra l'equità canonica e il diritto inglese nel medioevo in Inghilterra. Da uno studio storico-comparatistico, emerge, infatti, la stretta connessione tra il diritto canonico ed alcuni istituti tipici del diritto inglese quali l'equity ed il Trust. Tali istituti, considerati come un prodotto giuridico "tipico" del diritto inglese, trovano, invece, la loro origine nel diritto canonico. Lo studio si propone di evidenziare tali origini ed i legami storici tra i due diritti.
Assistive robotic walker parameter identification for estimation of human thrust without force sensors
2017
In this paper we propose a parameter identification procedure for the wheel-motor dynamic of a robotic walker, i.e. a commercial trolley for elderly people endowed with cognitive, sensing and guidance capabilities. The objective of the wheel-motor dynamic model is to generate a suitable time reference to be used in an estimation algorithm. The ultimate goal of the estimation algorithm is to retrieve the thrust, i.e. torque and force, that the older adult user of the robotic walker applies to the platform. These quantities are of paramount importance in order to adopt intelligent and comfortable walker guidance algorithms. The novelty of this approach is the avoidance of additional costly se…
The Legitimacy Crisis: An Introduction
2020
This section examines how the crisis of democratic legitimacy shapes the prospects for further integration. All the authors find evidence for ‘muddling through’ by the EU in response to its legitimacy crisis. Raube and Costa Reis show how the Commission and European Parliament took incremental steps of starting infringement proceedings against Hungary and Poland in response to breaches in the rule of law by elected populist governments, yet partisanship undermined the EU’s response. Holst and Molander discuss the democratic pitfalls of technocratic decision-making in response to crisis and detail the kinds of reforms needed to enhance accountability and citizen nonexpert participation in po…
Explaining the Difference between Policy-Based Evidence and Evidence-Based Policy: A Nexus Analysis Approach to Mobilities and Migration
2019
Abstract In this policy analysis, we explain the difference between policy-based evidence (PBE) and evidence-based policy (EBP). We argue that better, evidence-based understanding, explanations, and questions can be sought by problematizing the challenging forms of twenty-first century migration and mobilities. We emphasize that this can be done by not confusing PBE with EBP, especially when each is needed as a basis for specific types of action. By focusing on topics often viewed as “unrelated” or confused with one another, we underline the social dynamics that are unfamiliar to many policy actors, professionals, and stakeholders, who rely on scholars for actionable analyses. Our mode of i…
Founding myths of European Union Europe and the workings of power in the European Union heritage and history initiatives
2019
Along with the European Union’s (EU) increased interest in a common European culture and past, narration as a means to create and communicate about them has gained new momentum. By applying the Discourse-Mythological Approach, I explore how the EU narrates the story of the origins of EU Europe in two recent EU heritage/history initiatives. The analysis brought out three storylines in the mythmaking of EU Europe. While the first storyline emphasizes temporal continuity, shared cultural roots, and preservation and transmission of a common legacy, the second focuses on the idea of a break and a rebirth of a civic/political community. The third storyline highlighting founding figures and key he…