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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 61 to 66 of 66 (0.049 seconds)| 61 |
INDICATORI DI SOSTENIBILITÀ AMBIENTALE IMPLEMENTATI IN UN SISTEMA DI SUPPORTO ALLE DECISIONI PER IL SETTORE VITICOLO / ENVIRONMENTAL SUSTAINABILITY INDICATORS IMPLEMENTED IN A DECISION SUPPORT SYSTEM FOR VITICULTURAL SECTOR / ENVIRONMENTAL SUSTAINABILITY INDICATORS IMPLEMENTED IN A DECISION SUPPORT SYSTEM FOR VITICULTURAL SECTORMACCONI, MARTINA 17 March 2016 (has links)
La tesi si basa sui principi della sostenibilità ambientale applicati al settore della viticultura. I principali obiettivi sono: i) analisi della letteratura riguardante gli indicatori agro-ambientali, ii) sviluppo di una metodologia innovativa per valutare l’impatto ambientale della viticultura e, iii) applicazione della metodologia in casi pratici. La parte introduttiva è dedicata all’analisi degli indicatori agro-ambientali e delle relative politiche europee, alle tematiche inerenti il vino sostenibile e i sistemi di supporto alle decisioni per una viticultura sostenibile. Nella seconda parte è presentata una rigorosa e completa metodologia per valutare il livello di sostenibilità in tutte le fasi della produzione di uva, usando sia indicatori agronomici sia l’approccio della valutazione del ciclo di vita (Life Cycle Assessment). Sono state identificate sei categorie di impatto: salute umana, aria, suolo, biodiversità, consumi energetici e uso dell’acqua. Ogni categoria è composta da sotto-indicatori, per un totale di 21 sotto-indicatori, ognuno dei quali avente un punteggio (da 0 a 5) e un peso relativo nel punteggio complessivo di sostenibilità (da 0 a 5). La terza parte riguarda l’applicazione della metodologia in casi studio all’interno del progetto europeo “InnoVine”. Il lavoro di ricerca è stato realizzato seguendo le linee guida di standard internazionali e documentate fonti di letteratura per la valutazione della prestazione ambientale ed elaborando metodologie originali per la raccolta dei dati, la quantificazione degli impatti e l’interpretazione dei risultati. Infine, i risultati ottenuti confermano: i) la validità della metodologia nel calcolare gli impatti delle differenti pratiche viticole sull’ambiente e, ii) la possibilità di implementare la metodologia in un sistema di supporto alle decisioni per una viticultura sostenibile. / The thesis focuses on environmental sustainability principles applied to the viticultural sector. The main goals are: (i) analysis of the literature background on agri-environmental indicators, (ii) development of an innovative methodology to assess environmental impacts of viticulture, and (iii) testing of the methodology in practical cases. The introduction is dedicated to the analysis of the agri-environmental indicators and the related EU policies, sustainable wine issues, and decision support systems for a sustainable viticulture. In the second part, a rigorous and complete methodology is developed to assess the sustainability level of viticulture in all the phases of the grape growing using both agronomic indicators and the Life Cycle Assessment approach. Six impact categories were identified: human health, air, soil, biodiversity conservation, energetic consumptions, and water use. Each category is composed by sub-indicators, for a total of 21 sub-indicators, each of them having a score (between 0 and 5) and a defined weight on the overall sustainability score (between 0 and 5). In the third part, the methodology was tested in practical cases within the European project “InnoVine”. The study is carried out following the guidelines from international standards and from documented literature sources for the assessment of the environmental performance and elaborating original methodologies for the input data collection, the quantification of the impacts, and the interpretation of the results. Finally, the results obtained confirm: i) the methodology validity in quantifying the impacts of different grape production practices on the environment, and ii) the possibility to implement the methodology in a decision support system for a sustainable viticulture.
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The Six Authentic Motets of J.S. Bach: An Analysis in Relation to PerformanceMathesen, John A. 01 1900 (has links)
Analysis in relation to performance of the six authentic motets of J.S. Bach: Singet dem Herrn ein neues Lied ; Geist hilft unsrer Schwachheit auf ; Fürchte dich nicht ; Jesu, meine Freude ; Komm, Jesu, komm ; Lobet den Herrn, alle Heiden.
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Jahresbericht 2016 / Universitätsbibliothek Chemnitz / Annual Report 2016 / University Library of ChemnitzMalz, Angela 30 August 2017 (has links) (PDF)
Jahresbericht der Universitätsbibliothek Chemnitz und des Universitätsarchivs- Berichtsjahr 2016 / Annual report of the University Library of Chemnitz and the University Archive in 2016
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Jahresbericht 2016 / Universitätsbibliothek ChemnitzMalz, Angela 30 August 2017 (has links)
Jahresbericht der Universitätsbibliothek Chemnitz und des Universitätsarchivs- Berichtsjahr 2016 / Annual report of the University Library of Chemnitz and the University Archive in 2016
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High order numerical methods for a unified theory of fluid and solid mechanicsChiocchetti, Simone 10 June 2022 (has links)
This dissertation is a contribution to the development of a unified model of
continuum mechanics, describing both fluids and elastic solids as a general
continua, with a simple material parameter choice being the distinction
between inviscid or viscous fluid, or elastic solids or visco-elasto-plastic
media. Additional physical effects such as surface tension, rate-dependent
material failure and fatigue can be, and have been, included in the same
formalism.
The model extends a hyperelastic formulation of solid mechanics in
Eulerian coordinates to fluid flows by means of stiff algebraic relaxation
source terms. The governing equations are then solved by means of high
order ADER Discontinuous Galerkin and Finite Volume schemes on fixed
Cartesian meshes and on moving unstructured polygonal meshes with
adaptive connectivity, the latter constructed and moved by means of a in-
house Fortran library for the generation of high quality Delaunay and Voronoi
meshes.
Further, the thesis introduces a new family of exponential-type and semi-
analytical time-integration methods for the stiff source terms governing
friction and pressure relaxation in Baer-Nunziato compressible multiphase
flows, as well as for relaxation in the unified model of continuum mechanics,
associated with viscosity and plasticity, and heat conduction effects.
Theoretical consideration about the model are also given, from the
solution of weak hyperbolicity issues affecting some special cases of the
governing equations, to the computation of accurate eigenvalue estimates, to
the discussion of the geometrical structure of the equations and involution
constraints of curl type, then enforced both via a GLM curl cleaning method,
and by means of special involution-preserving discrete differential operators,
implemented in a semi-implicit framework.
Concerning applications to real-world problems, this thesis includes
simulation ranging from low-Mach viscous two-phase flow, to shockwaves in
compressible viscous flow on unstructured moving grids, to diffuse interface
crack formation in solids.
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La città da energivora a nodo attivo delle reti di produzione e di scambio energetico / Towns, Cities and Urban Areas. From Energy Consumers to Renewable Energies ProducersVENUTA, MARIA LUISA 13 July 2007 (has links)
Il concetto di rete dell'informazione può diventare uno schema logico con cui descrivere l'evoluzione delle politiche sulle energie rinnovabili e sulla sostenibilità?
La ricerca è stata svolta analizzando l'architettura delle due reti (internet e reti energetiche) e l'evoluzione del bene prodotto e distribuito nella rete energetica, l'energia, esplicitando l'accessibilità da parte della distribuzione mondiale delle risorse petrolifere tradizionali e delle risorse rinnovabili. La struttura metodologica del progetto di ricerca si basa due tipi di analisi teorica:
1) l'analisi della nascita delle società in rete attraverso le teorie di Manuel Castells (concetto di spazio di flussi) e di Saskia Sassen e l'evoluzione delle città (cap.2 e cap.5)
2) le analisi dei flussi dei materiali e delle energie avendo come riferimento metodologico l'approccio ecologico ideato dai ricercatori dell'istituto per il Clima, l'Ambiente e l'Energia di Wuppertal, Germania (cap.3 e cap.4)
La contraddizione tra città innovative e città che sono ai livelli di enormi discariche o di baraccopoli è esposta nel cap.6 attraverso casi studio e progetto dei Programmi Europei.
Nell'ultimo capitolo (cap.7) si riassumono le ipotesi di partenza e i risultati della ricerca e si espongono le questioni aperte. / Can internet logic scheme be used as a basis to describe public policies evolution on renewable energies production and sharing in urban areas all over the world?
The research project analyses the two networks (internet and energetic grids) architectures in actual and future urban areas. This analysis is connected with present and future forecasts energy productions from traditional fuels and from renewable sources.
Theoretical analysis is conducted following a double conceptual pathway:
- societal networks (Manuel Castells theory) and urban areas evolution (Saskia Sassen and Mike Davis) in order to picture the evolution of cities and towns in modern economies and in developing countries (Chapters 2 and 5);
- Material and Energy Flow Analysis (approach by Wuppertal Institute for Climate, Environment and Energy) applied to renewable energy (Chapters 3 and 4)
In Chapter 6 case studies are exposed on the deep cleavage between two different worlds: innovative, rich towns on a side and the landfills cities, slums on the other side.
In the last part hypothesis and thesis are put together and open questions are explained (Chapter 7).
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