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Progettazione di nuovi biomateriali a base poliestereaFoltran, Ismaela <1974> 15 June 2007 (has links)
No description available.
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"Dalla marca al goodwill: l'etica nell'insegna". Il valore immateriale della marcaMeglioli, Roberto <1963> 12 June 2007 (has links)
No description available.
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Optically active photoresponsive multifunctional polymeric materialsMauriello, Francesco <1980> 20 May 2008 (has links)
In the last year [1], Angiolini and co-workers have synthesized and investigated
methacrylic polymers bearing in the side chain the chiral cyclic (S)-3-hydroxypyrrolidine
moiety interposed between the main chain and the trans-azoaromatic chromophore,
substituted or not in the 4’ position by an electron-withdrawing group. In these materials, the
presence of a rigid chiral moiety of one prevailing absolute configuration favours the
establishment of a chiral conformation of one prevailing helical handedness, at least within
chain segments of the macromolecules, which can be observed by circular dichroism (CD).
The simultaneous presence of the azoaromatic and chiral functionalities allows the polymers
to display both the properties typical of dissymmetric systems (optical activity, exciton
splitting of dichroic absorptions), as well as the features typical of photochromic materials
(photorefractivity, photoresponsiveness, NLO properties).
The first part of this research was to synthesize analogue homopolymers and copolymers
based on bisazoaromatic moiety and compare their properties to those of the above mentioned
analogue derivatives bearing only one azoaromatic chromophore in the side chain. We
focused also the attention on the effects induced on the thermal and chiroptical behaviours by
the insertion of particulars achiral comonomers characterized by different side-chain mobility
and grown hindrance (MMA, tert-BMA and TrMA).
On the other hand carbazole containing polymers [2] have attracted much attention
because of their unique features. The use of these materials in advanced micro- and
nanotechnologies spreads in many different applications such as photoconductive and
photorefractive polymers, electroluminescent devices, programmable optical
interconnections, data storage, chemical photoreceptors, NLO, surface relief gratings, blue
emitting materials and holographic memory.
The second part of the work was focused on the synthesis and the characterization polymeric
derivatives bearing in the side chain carbazole or phenylcarbazole moieties linked to the (S)-
2-hydroxy succinimide or the (S)-3-hydroxy pyrrolidinyl ring as chiral groups covalently
linked to the main chain through ester bonds.
The last objective of this research was to design, synthesize, and characterize multifunctional
methacrylic homopolymers and copolymers bearing three distinct functional groups (i.e.
azoaromatic, carbazole and chiral group of one single configuration) directly linked in the
side chain.
This polymeric derivatives could be of potential interest for several advanced application
fields, such as optical storage, waveguides, chiroptical switches, chemical photoreceptors,
NLO, surface relief gratings, photoconductive materials, etc.
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Evaluation of the impact of nitrogen oxides (NOx) and conservation treatments on stone building materialsBugani, Simone <1977> 20 May 2008 (has links)
No description available.
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Sintesi e proprietà di nuovi materiali polimerici a base tiofenica per applicazioni innovativeCesari, Gaia <1981> 20 May 2008 (has links)
No description available.
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Metodologie di progetto di sistemi di diagnostica per macchine per la produzione di plasmi ad alte energieMannucci, Simone <1976> 19 June 2008 (has links)
No description available.
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Realizzazione di riporti funzionalizzanti su superfici ceramiche per la produzione di energia elettrica mediante effetto fotovoltaicoFazio, Sandra <1974> 29 May 2008 (has links)
This research, carried out during the PhD in Materials Engineering, deals with the
creation of layers, with different functionality, deposited on a ceramic substrate, to obtain
photovoltaic cells for electricity production.
The research activities are included in the project PRRIITT, Measure 4 (Development of
Networks), Action A (Research and Technology Transfer Laboratories), Thematic reference 3
(Advanced materials applications development), co-financed by the Emilia Romagna Region,
for the creation of CECERBENCH laboratory, which aims to develop "Tiles with a
functionalised surface”.
The innovation lies in the study of materials and in the development of technologies to
achieve a "photovoltaic surface", directly in the tiles production process. The goal is to
preserve the technical characteristics, and to make available new surfaces, exploiting
renewable energy sources. The realization of Building Integrated PhotoVoltaic (BIPV) is
nowadays a more and more spread tendency.
The aims of the research are essentially linked to the need to diversify the actual ceramic tile
production (which is strongly present in the Emilia Romagna Region ), and to provide a
higher added value to the tiles.
Solar energy production is the primary objective of the functionalization, and has a relevant
ecological impact, taking into account the overwhelming global energy demand.
The specific activities of the PhD were carried out according to the achievement of scientific
and technological objectives of CECERBENCH laboratory, and involved the collaboration in
design solutions, to obtain the cells directly on the tiles surface. The author has managed
personally a part of the research project.
Layers with different features were made:
- Electrically conductive layers, directly on the ceramic tiles surface;
- Layers to obtain the photovoltaic functionality;
- Electrically insulating, protective layers (double function).
For each layer, the most suitable materials have been selected. Among the technical
application, the screen printing was used. This technique, widely used in ceramics, has many
application areas, including the electronics and photovoltaic industries. It is an inexpensive
technique, easy to use in industrial production lines.
The screen printing technique was therefore studied in depth by theoretical
considerations, and through the use of rheological measurements.
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Controllo e qualificazione di aggregati di demolizione per nuovi calcestruzzi sostenibili: il caso dell'"ecomostro" di Punta PerottiCostantino, Antonio Beniamino <1977> 29 May 2008 (has links)
No description available.
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La questione percettiva in semiotica. Linee fondamentali e sviluppi della ricercaDe Bernardis, Mattia <1977> 16 April 2008 (has links)
This dissertation deals with the problems and the opportunities of a semiotic approach to
perception. Is perception, seen as the ability to detect and articulate an coherent picture of the
surrounding environment, describable in semiotic terms? Is it possibile, for a discipline wary of any
attempt to reduce semiotic meaning to a psychological and naturalized issue, to come to terms with
the cognitive, automatic and genetically hard-wired specifics of our perceptive systems? In order to
deal with perceptive signs, is it necessary to modify basic assumptions in semiotics, or can we
simply extend the range of our conceptual instruments and definitions? And what if perception is a
wholly different semiotic machinery, to be considered as sui generis, but nonetheless interesting for
a general theory of semiotics?
By exposing the major ideas put forward by the main thinkers in the semiotic field, Mattia de
Bernardis gives a comprehensive picture of the theoretical situation, adding to the classical
dichotomy between structuralist and interpretative semiotics another distinction, that between
homogeneist and etherogeneist theories of perception. Homogeneist semioticians see perception as
one of many semiotic means of sign production, totally similar to the other ones, while
heterogeneist semioticians consider perceptive meaning as essentially different from normal
semiotic meaning, so much so that it requires new methods and ideas to be analyzed.
The main example of etherogeneist approach to perception in semiotic literature, Umberto Eco’s
“primary semiosis” is then presented, critically examined and eventually rejected and the
homogeneist stance is affirmed as the most promising path towards a semiotic theory of perception.
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Il corpo in scena: indagine sullo statuto semiotico del corpo nella prassi performativaContreras Lorenzini, Maria José <1977> 16 April 2008 (has links)
No description available.
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