Agromafie e caporalato : quarto rapporto / a cura dell'Osservatorio Placido Rizzotto

• Record Nr.: UNINA9910507305003321
• Autore: Osservatorio Placido Rizzotto
• Pubbl/distr/stampa: Roma, : Bibliotheka, : Flai Cgil, 2018
• ISBN: 978-88-6934-473-2
• Descrizione fisica: 351 p. : ill. ; 23 cm
• Disciplina: 331.540945
• Locazione: FSPBC
• Collocazione: IX M 65
• Lingua di pubblicazione: Italiano
• Formato: Materiale a stampa
• Livello bibliografico: Monografia

Companion Proceedings of the 2020 Conference on Interactive Surfaces and Spaces / / Joaquim Jorge, [and three others]

• Record Nr.: UNINA9910510485003321
• Autore: Jorge Joaquim
• Pubbl/distr/stampa: New York : , : Association for Computing Machinery, , [2020]; ©2020
• Descrizione fisica: 1 online resource (127 pages) : illustrations
• Disciplina: 006.7
• Soggetti: Interactive multimedia
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Sommario/riassunto: We are happy and honored to welcome an unusual audience to a ; remarkable event - the 2020 ACM International Conference on Interactive Surfaces and Spaces, taking place online November 8 to 11. As part of ISS, Doctoral Symposium and Workshop sessions took place on November 8, with the Symposium starting from November 9. ISS is unique to its loyal and thriving community. 2020, however, is unforgettable as the year when the pandemic hit. Since March, the world went into quarantine and remained there until November. Conferences such as ISS had to mutate to move online, yet still serve their purpose to connect the community they serve in a significant manner. Transforming ISS into a virtual meeting has not been easy. The original plan was to hold a regular Lisbon meeting, listening to talks, stimulating conversation, hands-on demos, nice Lisbon weather, and excellent local seafood. By May, we had to accept that there was no alternative to going virtual. Since then, we have been working to implement a completely different event - one confined to our computer screens. Zoom and Discord replaced physical meeting rooms and we can meet in Hubhub as a replacement for virtual coffee breaks. Our technical program includes 25 accepted papers (out of 89 submissions), 15 posters, and eight demos.

Discrete element model and simulation of continuous materials behavior set . Volume 1 Discrete element method to model 3D continuous materials / / Mohamed Jebahi [and three others]

• Record Nr.: UNINA9910823353003321
• Autore: Jebahi Mohamed
• Pubbl/distr/stampa: London, England ; ; Hoboken, New Jersey : , : iSTE : , : Wiley, , 2015; ©2015
• ISBN: 1-119-10275-8; 1-119-10304-5; 1-119-10291-X
• Descrizione fisica: 1 online resource (198 p.)
• Collana: Numerical Methods in Engineering Series
• Disciplina: 620.11015118
• Soggetti: Materials - Mathematical models; Discrete element method
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: Cover; Title Page; Copyright; Contents; List of Figures; List of Tables; Preface; Introduction; I.1. Toward discrete element modeling of continuous materials; I.2. Scope and objective; I.3. Organization; 1: State of the Art: Discrete Element Modeling; 1.1. Introduction; 1.2. Classification of discrete methods; 1.2.1. Quantum mechanical methods; 1.2.2. Atomistic methods; 1.2.3. Mesoscopic discrete methods; 1.2.3.1. Lattice methods; 1.2.3.2. Smooth contact particle methods; 1.2.3.3. Non-smooth contact particle models; 1.2.3.4. Hybrid lattice-particle models; 1.3. Discrete element method for continuous materials1.4. Discrete-continuum transition: macroscopic variables; 1.4.1. Stress tensor for discrete systems; 1.4.2. Strain tensor for discrete systems; 1.4.2.1. Equivalent continuum strains; 1.4.2.2. Best-fit strains; 1.4.2.3. Satake strain; 1.5. Conclusion; 2: Discrete Element Modeling of Mechanical Behavior of Continuous Materials; 2.1. Introduction; 2.2. Explicit dynamic algorithm; 2.3. Construction of the discrete domain; 2.3.1. The cooker compaction algorithm; 2.3.1.1. Stopping criterion of compaction process; 2.3.1.2. Filling process; 2.3.1.3. Overlapping removing2.3.2. Geometrical characterization of the discrete domain; 2.3.2.1. Geometrical isotropy and granulometry; 2.3.2.2. Average coordination number; 2.3.2.3. Discrete domain fineness; 2.4. Mechanical behavior modeling; 2.4.1. Cohesive beam model; 2.4.1.1. Analytical model; 2.4.1.2. Strain energy computation; 2.4.2. Calibration of the cohesive beam static parameters; 2.4.2.1. Quasistatic tensile test description; 2.4.2.1.1. From discrete to continuous geometry; 2.4.2.1.2. Loading; 2.4.2.1.3. EM and νM computation; 2.4.2.2. Parametric study; 2.4.2.2.1. Microscopic Poisson's ratio influence2.4.2.2.2. Microscopic Young's modulus influence; 2.4.2.2.3. Microscopic radius ratio influence; 2.4.2.3. Calibration method for static parameters; 2.4.2.4. Convergence study; 2.4.2.5. Validation; 2.4.3. Calibration of the cohesive beam dynamic parameters; 2.4.3.1. Calibration method for dynamic parameters; 2.4.3.2. Validation; 2.5. Conclusion; 3: Discrete Element Modeling of Thermal Behavior of Continuous Materials; 3.1. Introduction; 3.2. General description of the method; 3.2.1. Characterization of field variable variation in discrete domain; 3.2.2. Application to heat conduction3.3. Thermal conduction in 3D ordered discrete domains; 3.4. Thermal conduction in 3D disordered discrete domains; 3.4.1. Determination of local parameters for each discrete element; 3.4.2. Calculation of discrete element transmission surface; 3.4.3. Calculation of local volume fraction; 3.4.4. Interactions between each discrete element and its neighbors; 3.5. Validation; 3.5.1. Cylindrical beam in contact with a hot plane; 3.5.2. Dynamically heated sheet; 3.6. Conclusion; 4: Discrete Element Modeling of Brittle Fracture; 4.1. Introduction; 4.2. Fracture model based on the cohesive beam bonds
• Sommario/riassunto: Complex behavior models (plasticity, cracks, visco elascticity) face some theoretical difficulties for the determination of the behavior law at the continuous scale. When homogenization fails to give the right behavior law, a solution is to simulate the material at a meso scale in order to simulate directly a set of discrete properties that are responsible of the macroscopic behavior. The discrete element model has been developed for granular material. The proposed set shows how this method is capable to solve the problem of complex behavior that are linked to discrete meso scale effects.