The exponentiated Hencky strain energy in modelling tire derived material for moderately large deformations

This work presents a hyper-viscoelastic model based on the Hencky-logarithmic strain tensor to model the response of a Tire Derived Material (TDM) undergoing moderately large deformations. TDM is a composite made by cold forging a mix of rubber fibers and grains, obtained by grinding scrap tires, and polyurethane binder. The mechanical properties are highly influenced by the presence of voids associated with the granular composition and low tensile strength due to the weak connection at the grain-matrix interface. For these reasons, TDM use is restricted to applications concerning a limited range of deformations. Experimental tests show that a central feature of the response is connected to highly nonlinear behavior of the material under volumetric deformation which conventional hyperelastic models fail in predicting. The strain energy function presented here is a variant of the exponentiated Hencky strain energy proposed by Neff et al., which for moderate strains is as good as the quadratic Hencky model and in the large strain region improves several important features from a mathematical point of view. The proposed form of the exponentiated Hencky energy possesses a set of parameters uniquely determined in the infinitesimal strain regime and an orthogonal set of parameters to determine the nonlinear response. The hyperelastic model is additionally incorporated in a finite deformation viscoelasticity framework that accounts for the two main dissipation mechanisms in TDMs, one at the microscale level and one at the macroscale level. The model is capable of predicting different deformation modes in a certain range of frequency and amplitude with a unique set of parameters with most of them having a clear physical meaning. Moreover, by comparing the predictions from the proposed constitutive model with experimental data we conclude that the new constitutive model gives accurate prediction

Solidarietà sociale e coscienza nazionale

l testo che si presenta è tratto da una delle opere più imponenti di Léon Duguit: l’État le droit objectif et la loi positive , che venne pubblicato a Parigi per i tipi delle prestigiose edizioni Albert Fontemoing nel 1901. Il volume, assieme a l’État les gouvernants et les agents, del 1903, rappresenta il frutto di un periodo appassionato e particolarmente produttivo del fondatore dell’Ecole du Service public . I fondamenti teorici del suo percorso possono già essere apprezzati nella ricchezza di queste due opere giovanili, all’interno delle quali vengono elaborate le tematiche più incisive della sua dottrina che continuerà a sostenere e difendere per tutto il resto della sua vita

Conoscenza e informazione del cultural heritage come spazio d\u2019impresa

Ancora negli anni \u201980 il sistema industriale poteva essere considerato il \u201cgrande responsabile\u201d della rovina del tessuto artistico dei luoghi. Ma la \u201ccatastrofe\u201d avviata da lungo tempo attorno al concetto di territorio sfociava allora in una nuova epistemologia, anche attenta all\u2019integrazione fra ecologia ed economia, rapidamente accolta in ogni ambito disciplinare. Fra l\u2019altro, mentre gi\ue0 da un ventennio la constatazione dei limiti del funzionamento del mercato rispetto all\u2019ambiente naturale aveva minato la nozione marshalliana di economie esterne ed originato la nuova branca degli environmental economics, alcuni storici dell\u2019arte si erano d\u2019altra parte provati a rompere la tradizionale compartimentazione del proprio settore, per contestualizzare il tema dei beni culturali nel quadro della politica economica ed urbanistica. Poi emersa l\u2019importanza del territorio sotto il profilo anche culturale, alla nuova teoria degli stakeholder e alla social corporate responsability le imprese hanno corrisposto con la logica oblativa della grants economy, per\uf2 insufficiente nell\u2019attuale stagione della economia della conoscenza per fronteggiare le esigenze del cultural heritage riconosciuto come decisivo fattore di produzione. Il sistema industriale, opportunamente avvalendosi dello sviluppo tecnologico, pu\uf2 ora applicarsi ad innovative forme di conoscenza e di informazione del capitale culturale diffuso sul territorio e concentrato nei musei, in funzione della sua salvaguardia e valorizzazione, implementando processi produttivi efficaci, efficienti e imprenditorialmente profittevoli in una prospettiva multi-stakeholder indirizzata a pi\uf9 aree di scambio di natura privata e pubblica. Proprio al principio degli anni \u201980 Giovanni Urbani, il maggior tecnico del \u2018900 per la conservazione dei beni culturali, auspicava \u201cche ci\uf2 che finora ha portato alla separazione e al dissidio possa un giorno ricongiungere e sanare\u201d

Teaching Economic Risk Management through a Video Game Concept

Many video games imply economic behavior: making decisions within a game highlights the fundamentals of human action. The basic idea is that virtual worlds, like the real world, present us with a series of choices. Games impose digital scarcity, obliging players to weigh the benefits of different courses of action, make tradeoffs, and incur costs. Good examples are found in the role-playing game (RPG) genre, where players face tough choices between different specializations and skill trees. Obliging players to make difficult decisions highlights the opportunity costs of choice, not the money cost. Games also encourage players to think entrepreneurially: to take risks and sacrifice scarce resources to profit. Entrepreneurs specialize in a kind of creative problem-solving in the marketplace, and gamers do much the same in the virtual sphere. But there are many more ways – real and metaphorical – to bring gaming into economics and vice versa. This project consists of a video game concept of my design that exemplifies a real-life simulation in which the player embarks on a farming career and has to make choices throughout the game that affect where the game will go to next. All choices have major or minor consequences that can change the way that the game unfolds in the end. The choices that they make will have consequences on the environment and also will involve monetary risk. For example, if the player chooses not to practice sustainable agriculture, then they may contaminate the ground which will lead to contamination of the groundwater supply, causing both severe environmental and economic consequences. Video games can have educational value by offering motivation and relevance into students’ lives. When faced with problems in real life, we can become anxious, overwhelmed, and feel like giving up. In gaming worlds when confronted with a problem or obstacle, the player is motivated to persist until the problem is solved. Then, the player can advance and move forward in the game plot. In games, players are motivated to take risks, collaborate, and creatively problem-solve until an epic win occurs. Isn’t this the type of motivation we want to foster in classrooms

Shedd Market Research

Before you is a solution to a business issue question that was developed by my team and myself. Shedd was curious about who was coming in and why and we looked to answer that question

Search for single production of a Vector-Like partner of the bottom quark in the bH(bb) final state in pp collisions at √s = 13 TeV with the ATLAS detector

A search is presented for single-produced vector-like B quark decaying to a Standard Model b-quark and a Higgs boson, itself decaying into a b-quark pair. The B decay system is reconstructed as an association of a large-radius jet and a small-radius jet, respectively taken to reflect the secondary Higgs decay system and the $b$ quark produced in the immediate resonance decay. The search is the first at ATLAS to probe the Higgs to b-quark pair final state in Run-2, and aims at extending the region of the M(B) phase space the current exclusion limits, set by the pair production combination search at 1220 GeV for a Vector-Like B quark occurring as an isospin singlet. For this purpose, a newly designed and optimised event selection was implemented for maximal sensitivity in the 1000-2000 GeV invariant mass region, and a particular effort was dedicated in researching and implementing data-driven modelling techniques to provide a reliable estimation of the main, QCD-Driven, background source to the search. A binned likelihood fit is set up for the statistical interpretation of the results, which are presented in the form of mass- and coupling-dependent 95% CLs exclusion limits on the production cross section of a VLQ-like signal

Instructional Scaffolding of the ACRL Framework for Information Literacy for Developmental Learners.

Information literacy has become a necessary set of abilities for community college students to possess in this age of digital distribution. The plethora of information that is generated at an almost instantaneous rate has brought about the need for an information-literate student body with the ability to both decipher and utilize viable and valid information. However, the attainment of such abilities requires the comprehension of information literacy core concepts. These concepts, while instrumental, may be difficult to grasp without a foundation of practical familiarity, especially for students in developmental education courses. In this presentation, Fabio Montella, Assistant Professor of Library Services, discusses his use of instructional scaffolding, constructivist learning and the ACRL Framework for Information Literacy to teach research skills in successive developmental reading courses. These instructions were part of a collaborative effort with reading faculty at Suffolk County Community College. Student-centered lesson plans, learning objects, and the collaborative nature of these instructions will be presented and analyzed

Flow curvature effects on dynamic behaviour of a novel vertical axis tidal current turbine: numerical and experimental analysis

The paper deals with performances analysis of vertical axis turbine to exploit tidal marine currents. Flow curvature effects on performences of a novel vertical axis turbine have been investuigated. It has been shown that the flow curvature effect allows to design properly an accurate airfoil shape to increase turbine performances

Wine tourism and sustainability: a review

The literature on tourism and events is endless; a niche in this wide research field is represented by food and wine research. The growing interest shown by wine tourists has nurtured the proliferation of wine events and the growth of the wine tourism business; as a consequence, academicians\u2019 interest in this issue has increased. At the same time, research on tourism and events is an evolving field and it has moved from a main economic focus to a broader perspective: some scholars have highlighted how the growing interest towards green and sustainable practices has stimulated academic research and a lot has been done on the management of environmental issues. Given the resonance of wine tourism and the role it has for local and rural development, the interest towards the issue of sustainability in wine is more than warranted. Thus, this paper aims to provide some useful insights about where research has gone and where it is going; a thorough literature review has been performed