Search results for "REGENERATION"
showing 10 items of 889 documents
Resource, environmental and economic considerations in the development of a Reverse Electrodialysis Heat Engine
The RED Heat Engine operates as a closed-loop RED system, where limited amounts of artificial saline solutions are used as working fluids. The solutions exiting from the RED unit are regenerated by means of a separation step, which uses low-temperature heat as its energy source. Essentially the system converts low-grade heat to electricity. There are two main alternative regeneration strategies: (i) extract solvent from the high salinity solution and move it to the low salinity solution or (ii) extract salt from the low salinity solution and move it to the high salinity solution. In this thesis are considered the Multi-effect distillation (MED) and the Membrane Distillation (MD) under the s…
Browsing hinders the regeneration of broadleaved trees in uneven-aged forest management in southern Finland
2020
Uneven-aged forest management has attained increasing popularity. It may benefit biodiversity, buffer against pests and abiotic damages, decrease runoff from clearcuts and improve recreational values. We studied how gap cuttings and single-tree selection cuttings influence browsing damage in spruce-dominated forests in south-central Finland. Overall, browsing damage was especially frequent in aspen and rowan, but also in birch. The larger the basal area left in harvesting, the lower the browsing pressure on birch and rowan; neither the harvesting method nor the seedling density had an independent effect on browsing damage. Although larger tree retention levels may reduce browsing damage, th…
Nuovi abitanti per il riuso dei territori storici: il caso dell’area sud-orientale della Sicilia
2015
L’alta concentrazione di risorse culturali e paesaggistiche presenti nel Mezzogiorno pur avendo un grande potenziale produttivo stenta a fare da volano allo sviluppo. Nonostante le difficoltà del contesto, in alcune aree del Mezzogiorno alle tendenze regressive si stanno affiancando nuove tendenze progressive, energie nuove che alimentano un’imprenditorialità in settori legati alle risorse locali, nelle sue molteplici declinazioni. In tali aree i processi di trasformazione in atto sembrano guidati da nuove prospettive di sostenibilità, sviluppo locale e good governance. Partendo da queste considerazioni si è scelto come campo di indagine l’area sud-orientale della Sicilia che appare di part…
Verso una dimensione internazionale. Processi di riuso del patrimonio edilizio storico nella Sicilia Sud-orientale
2021
Le lunghe e complesse vicende storiche caratterizzate dall’intrecciarsi di culture millenarie hanno prodotto nel Mezzogiorno, forse più che altrove, una straordinaria concentrazione di beni culturali e un susseguirsi di paesaggi antropizzati unici, un capitale territoriale di eccezionale rilevanza che, adeguatamente gestito e valorizzato, potrebbe fare da volano per uno sviluppo sostenibile. Nonostante le difficoltà del contesto di riferimento in alcune aree del Mezzogiorno, alle tendenze regressive si stanno affiancando energie nuove che alimentano un’imprenditorialità in settori legati alle risorse locali nelle sue molteplici declinazioni. In particolare, nei territori della Sicilia Sud-o…
Palermo Costa Sud: futuri prossimi a coordinata 0,0,0
2015
La Costa Sud di Palermo è un territorio che contiene in sé forti elementi di resilienza identitaria, ma che a causa della sua attuale fragilità si presenta come un mosaico scomposto di parti – spesso indistinte – che producono l’effetto opposto di resistenza alla trasformazione. Il contributo propone le questioni di riferimento per la rigenerazione della costa sud, a partire dalle sperimentazioni condotte nel workshop PMO Re-verse (settembre 2014) evento della ricerca PRIN Re-cycle Italy. Nuovi cicli di vita per architetture infrastrutture della città e del paesaggio
La street art come motore di recupero e rigenerazione urbana delle aree interne. Un progetto condiviso per lo sviluppo di smart villages nell'area Ma…
2022
The Madonie district, one of the 72 pilot areas of the National Strategy for Inner Areas in Italy in the center of Sicily, is composed by 21 municipalities that really have a great potential, due to their historical background and natural landscape, but it needs new strategies to emerge. Many people from northern cities have returned to their home villages in recent years, to live and work, but they have not found some important and necessary services as there are in smart cities, and to date, these villages do not adopt smart strategies. Many changes need to be made, one solution is to transform them into smart villages through rehabilitation, such as improving the historic center with str…
Innovation in the regeneration of the histric center in Sicily: Barcellona Pozzo di Gotto (ME)
2012
Abstract The criteria for intervention on the existing building heritage in the historic centers cannot be pursued without taking into consideration the renovation of the whole relevant urban territory. This does not imply an idea to postpone to future planning, rather to increase the topics in the General Urban Plan (PUG), by bringing into the PUG the elements of the traditional detailed plans for the historic areas with a methodology simplification. The detailed planning has been characterized in the years as “exemplary”, possibly due to the complexity of its project contents and rules and regulations, particularly in the historic areas. Indeed in Italy detailed plans for historic areas a…
Innovation in the regeneratio of the historic centers in Sicily: Barcellona Pozzo di Gotto (ME)
2012
Assessing osseointegration of metallic implants with boronized surface treatment
2020
Background Modification of endosteal implants through surface treatments have been investigated to improve osseointegration. Boronization has demonstrated favorable mechanical properties, but limited studies have assessed translational, in vivo outcomes. This study investigated the effect of implant surface boronization on bone healing. Material and Methods Two implant surface roughness profiles (acid etched, machined) in CP titanium (type II) alloy implants were boronized by solid-state diffusion until 10-15µm boron coating was achieved. The surface-treated implants were placed bilaterally into 5 adult sheep ilia for three and six weeks. Four implant groups were tested: boronized machined …
Effect of Mg2+ ions on competitive metal ions adsorption/desorption on magnesium ferrite : mechanism, reusability and stability studies
2021
The adsorption behavior of magnesium ferrite in single- and multicomponent metal ions solutions in the presence of Mg2+ ions were studied. A dramatic decrease in the adsorption capacity of magnesium ferrite towards Mn2+, Co2+, and Ni2+ ions for comparison study of single- and multicomponent solutions was established. The affinity of the sorbent in accordance with the maximum sorption capacities increases in the following order Cu2+ > Co2+ > Ni2+ > Mn2+. High efficiency of magnesium ferrite regeneration (~100%) with aqueous solutions of magnesium chloride in the concentration range of 0.001-0.1 M was shown. The low degree of toxic metal ions desorption combined with XRD, IR spectroscopy, and…