1,721,385 research outputs found
Membro del progetto "High Tech Skills for Industry: Fostering New Service Growth and Jobs Creation', Empirica and ISSIP for European Commission.
No full textConservation and safeguard of colour in historic building surfaces
No full textIn the context of the culture of recovery, conservation and maintenance of buildings, the study of techniques, materials, color and surface finishes of historic buildings plays an important role. The conservation of these ele-ments is important for both architectural and environmental aspects. The color of the wall surfaces depend on the use of sands and peculiar pigments, mostly local ones used in plasters, as well as on the use of stones or other covering materials deriving from a consolidated historical and technical tradi-tion. The Italian vernacular architecture of historic centers has always been characterized by peculiar shapes and colors in the different regional areas, in the same way the courtly or monumental architecture is characterized by colors deriving from the use of specific materials present in the places. Even the signs and patinas found on the surfaces allow us to better understand the construction events of the artefact over time. It is therefore of extreme inter-est to preserve the surfaces of historical artefacts as much as possible, re-specting their authenticity and avoiding altering, with inappropriate repair in-terventions, the perception of the image of the building in its environmental context. What and how to preserve the integrity of architectural surfaces, due to their material value and evidence of a consolidated construction tradition, requires adequate cultural and technical tools. Among the latter, color plans can allow to monitor and control interventions on the surfaces of historic buildings. On the other hand, however, there is a risk of considering the col-or plans as projects finalized in themselves, thus losing sight of the transfor-mations linked to the life history of the buildings, the vicissitudes and muta-tions engraved in the skin and color of their surfaces in search of an ideal original philological identit
Cultural and environmental heritage amid conflicts, climate change and overexploitation: an unsustainable and often underestimated cost for the future
Full text linkUnfortunately, today the effects of conflicts fought with increasingly devastating weapons are added to the climate vulnerability and the dangers of excessive exploitation of environmental resources. Alongside the dead and wounded in the disastrous toll of wars, there are other silent victims: monuments, landscapes, urban and building fabrics, environmental ecosystems, water and natural resources of territories and places. However, safeguarding and protecting monuments and testimonies, not only material but belonging to the cultural space of universal and intergenerational value of humanity, can represent a significant tool for strengthening the resilience and ability to survive of peoples and communities. In our present SDG16 Peace, justice and solid institutions, of the 2030 Agenda seems like a utopia but pursuing it with tenacity is the main hope for the future of humanity
Dwelling on Earth by learning from Nature. Urban and building systems more sustainable and resilient through the use of Nature Based Solutions and Biomimicry
No full textIn the last two and a half centuries, an instant compared to the 4 billion years of the Earth's life, the human species has compromised every ecological niche on the planet, upsetting the delicate balances of homeostasis that regulate the biosphere. In 2020, the mass of all man-made artefacts made by humanity, over one trillion tonnes, exceeded the mass of all living organisms. The growing impact of the human footprint on the planet is accompanied by a strong increase in urbanisation even in the oldest economies, where population growth is almost zero. UN projections predict that by 2050 some 70 % of the world's population will live in urban areas. This will lead to an inevitable growth in the number and volume of new buildings. Globally, according to the Global Alliance for Building and Construction (GABC), there are about 245 billion square metres of buildings on earth today. Without corrective measures, another 230 billion will be built in the next forty years and 70 % of these will not be covered by mandatory and shared energy and environmental efficiency standards. One can therefore understand how cities and buildings constitute a strategic and necessary area for achieving the environmental and decarbonisation goals of Agendas 2030-2050. In relation to these goals, the contribution intends to explore the potential of Nature Based Solutions (NbS) and the biomimetic approach to regenerate and transform urban and built environment
Dwelling on Earth by learning from Nature. Urban and building systems more sustainable and resilient through the use of Nature Based Solutions and Biomimicry
Full text linkIn the last two and a half centuries the human species has compromised every ecological niche on the planet, upsetting the delicate balances of homeostasis that regulate the biosphere. In 2020, the mass of all man-made artefacts made by humanity, over one trillion tonnes, exceeded the mass of all living organisms. The impact of human activities on the planet has reached levels that go beyond the safety thresholds of the different planetary systems on which the biosphere is based. In particular, the impact of the construction sector and built-up areas is extremely problematic due to the intensive use of resources and energy. A paradigm shift in the way of building and living is urgently needed so that the human species can continue to inhabit the earth
A S-D logic conceptualization of markets: an application to low income consumers in emerging markets.
No full textNanomaterials for Titanium-Based Anodes in Sodium-ion Batteries
No full textSodium-ion batteries (SIBs) represent a viable alternative to lithium-ion batteries (LIBs) since sodium is more abundant and less expensive than lithium in nature. However, Na+ ions are bigger than Li+ ions, which makes them diffuse slower in the electrodes. Therefore, finding suitable anode materials that can achieve high performance is an interesting goal in SIB research. Titanium-based (Tibased) anode materials have attracted a lot of attention in SIBs, because they have the benefits of being safe and stable in structure. Nanostructures provide a larger surface area for sodium ion absorption and shorter paths for their transportation. However, to achieve high performance, they need to be designed and engineered at the nanoscale level. In this article, we review the latest progress in Ti-based nanoscale structures that can improve the energy density, cycling stability, and rate capability of SIBs
La raccolta differenziata: il caso del Comune di Sassari
No full textIl Comune di Sassari (popolazione di circa 125.000 abitanti) ha raggiunto nel 2005 una percentuale del 6,4 % di Raccolta differenziata contro i 5,8% dell’anno precedente, un aumento contenuto a fronte di una produzione di rifiuti di 59.422 t nel 2004 e di 59.286 t nel 2005.
Il totale di rifiuti raccolti in modo differenziato è passato da 3.648 t/anno nel 2004 a 4.030 t/anno 2005 ed il gettito, nello stesso periodo, da 29 a 32 Kg/ab./anno.
Nel maggio 2006 l’Amministrazione Comunale di Sassari ha implementato un nuovo “sistema” di raccolta dei rifiuti urbani, attraverso un importante campagna di informazione ed una distribuzione più capillare di contenitori stradali affiancati agli usuali cassonetti (2.300 per l’indifferenziato e 500 per carta-cartone, plastica-lattine, vetro, umido).
L’avvio della raccolta differenziata è stato accompagnato da una campagna informativa attuata con la distribuzione di un vademecum illustrativo, con l’inserimento nei quotidiani locali e nel sito internet del comune di informazioni rivolte ai cittadini sulla corretta modalità di gestione della raccolta dei rifiuti.
Questo nuovo sistema ha consentito di raggiungere nel 2006 una quantità di rifiuti raccolti in modo differenziato superiore alle 9 mila tonn./anno, corrispondenti ad una percentuale di RD del 16,21% sul totale, che ha raggiunto, nel 1° trimestre del 2007, una quota pari al 24%, facendo rilevare una crescita apprezzabile.
Le percentuali si discostano da quella minima stabilita del 35%, che, in base al D.l.vo 22/97 “Decreto Ronchi” doveva essere raggiunta nel 2003, e che viene spostata al 2006 dal “Testo Unico Ambientale” D.l.vo n.152/06.
I dati dell'Osservatorio regionale rifiuti mostrano l’andamento degli ultimi anni: nel 2002 la Sardegna aveva un livello di raccolta differenziata del 2,8%, mentre nel 2006 la media isolana è salita al 18-20%, grazie alle premialità riconosciute all'80% dei Comuni sardi.
Il lavoro ha preso in considerazione la valutazione dello stadio di sviluppo della raccolta differenziata nel Comune di Sassari alla luce delle nuove strategie dell’Amministrazione, in ottemperanza a quanto previsto nel Piano regionale di gestione dei rifiuti, adottato il 12 dicembre 2006, che prevedeva per la Sardegna l'obiettivo del 30% entro il 2008, traguardo che, dopo l’approvazione del nuovo atto di indirizzo per lo sviluppo delle raccolte differenziate, sarà da raggiungere entro il 2007.
Sono state inoltre valutate le motivazioni che potrebbero ostare al raggiungimento delle percentuali previste nel Piano Regionale, in un così breve lasso di tempo.The city of Sassari (population c. 125,000) collected 6.4% of differentiated waste in 2005, compared with 5.8% the previous year. This increase took place out of total waste collection of 59,286 tons in 2005, compared with 59, 422 tons in 2004.
The total quantify of differentiated waste increased from 3,648 tons in 2004 to 4,030 tons in 2005, and the quantity per head from 29 to 32 kg in the same period.
In May 2006 Sassari City Council set up a new system of differentiated urban waste collection, supported by an extensive publicity campaign and including the placement of containers for differentiated waste alongside the usual waste skips (2,300 for undifferentiated waste and 500 each for paper and card, plastic and tins, glass, and organic waste).
The beginning of differentiated waste collection was accompanied by a publicity campaign which included the distribution of al illustrated leaflet, articles in the local newspapers, and an internet site set up by the city council which explained to citizens the correct way to manage their household waste.
With the new system more than 9,000 tons of differentiated waste was collected in 2006, which was equivalent to 16.21% of total waste, while in the first three months of 2007 the figure rose appreciably to 24,00% of total waste collected.
The percentage is still far from the minimum of 35% established by the “Ronchi Decree” (D.l.vo 22/97) as to be met by 2003, although the deadline was later shifted to 2006 in the “Testo Unico Ambientale” D.l.vo n.152/06.
The data from the regional waste survey shows the changes in the last few years. In 2002 the quantity of differentiated waste collected in Sardinia was 2.8% of the total, while by 2006 this had risen to 18-20% thanks to initiatives taken by 80% of Sardinian local authorities.
This study takes evaluates the stage of development of differentiated waste collection by Sassari City Council in the light of the new strategies of the administration, in compliance with the regional plan for waste, approved on 12 December 2006. This established objectives for differentiated waste of 30% of total waste by 2008, an objective which, after the approval of the new regulations which govern differentiated waste, must be achieved in 2007.
The factors which may prevent these percentages being achieved in the brief period of time established in the Regional Plan are also evaluated in the paper
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