Search results for " Green"

THE DEVELOPMENT AND FINANCIAL SUSTAINABILITY OF A TOURIST NETWORK FOR A COASTAL REGION

2016

This study springs from a reflection on the concept of the Slow Network as a tool to strengthen the connection between a territory and its inhabitants, through the rediscovery of the agro-environmental, landscape, historical, artistic, and cultural value of each territory. Creating a slow network means utilising slow mean of mobility thus creating a "greenway" to give life to an ecomuseum and to cultural tourism in an eco-sustainable manner. The resources of an area are enhanced by creating a synergy between them, the tourism industry, and the local economy, which is dedicated to the promotion of an integrated tourism that involves rural areas, natural areas, eno gastronomic tours, and them…

BIOCHARS IN SOILS: TOWARDS THE REQUIRED LEVEL OF SCIENTIFIC UNDERSTANDING

2017

The special issue on Biochar as an Option for Sustainable Resource Management Key priorities in biochar research for future guidance of sustainable policy development have been identified by expert assessment within the COST Action TD1107. The current level of scientific understanding (LOSU) regarding the consequences of biochar application to soil were explored. Five broad thematic areas of biochar research were addressed: soil biodiversity and ecotoxicology, soil organic matter and greenhouse gas (GHG) emissions, soil physical properties, nutrient cycles and crop production, and soil remediation. The highest future research priorities regarding biochar’s effects in soils were: functional …

The crucial interactions between climate and soil

2022

Since the birth of soil science, climate has been recognized as a soil-forming factor, along with parent rock, time, topography, and organisms (from which humans were later kept distinct), often prevalent on the other factors on the very long term. But the climate is in turns affected by soils and their management. This paper describes the interrelationships between climate – and its current change – and soil, focusing on each single factor of its formation. Parent material governs, primarily through the particle size distribution, the capacity of soil to retain water and organic matter, which are two main soil-related drivers of the climate. Time is the only unmanageable soil-forming facto…

Per un ripensamento dello standard in chiave prestazionale: un caso studio a Palermo

2017

Il contributo nasce dallo studio dell’esperienza di Parco Uditore, un'area verde di Palermo, diventata nel 2012 parco pubblico in seguito a una mobilitazione civica. L'apertura del parco in una circoscrizione che, parimenti alle altre a Palermo, risulta carente di aree attrezzate ha indotto un ragionamento sull'ipotesi di stabilire dei parametri prestazionali, oltre che di superficie, per gli spazi pubblici verdi. Seguendo una metodologia induttiva e comparativa, rispetto a modelli sperimentati in altri contesti, il contributo si propone di verificare se dall’osservazione del caso di Parco Uditore sia possibile estrapolare parametri prestazionali da affiancare alla dotazione minima dello st…

Spray-dried ‘green’ polyphenols-enriched extracts from waste bentonite to produce nutraceuticals for oral care

2023

Contour calculus for many-particle functions

2019

In non-equilibrium many-body perturbation theory, Langreth rules are an efficient way to extract real-time equations from contour ones. However, the standard rules are not applicable in cases that do not reduce to simple convolutions and multiplications. We introduce a procedure for extracting real-time equations from general multi-argument contour functions with an arbitrary number of arguments. This is done for both the standard Keldysh contour, as well as the extended contour with a vertical track that allows for general initial states. This amounts to the generalization of the standard Langreth rules to much more general situations. These rules involve multi-argument retarded functions …

A many-body approach to transport in quantum systems : From the transient regime to the stationary state

2022

We review one of the most versatile theoretical approaches to the study of time-dependent correlated quantum transport in nano-systems: the non-equilibrium Green's function (NEGF) formalism. Within this formalism, one can treat, on the same footing, inter-particle interactions, external drives and/or perturbations, and coupling to baths with a (piece-wise) continuum set of degrees of freedom. After a historical overview on the theory of transport in quantum systems, we present a modern introduction of the NEGF approach to quantum transport. We discuss the inclusion of inter-particle interactions using diagrammatic techniques, and the use of the so-called embedding and inbedding techniques w…

Cutting rules and positivity in finite temperature many-body theory

2022

Abstract For a given diagrammatic approximation in many-body perturbation theory it is not guaranteed that positive observables, such as the density or the spectral function, retain their positivity. For zero-temperature systems we developed a method [2014 Phys. Rev. B 90 115134] based on so-called cutting rules for Feynman diagrams that enforces these properties diagrammatically, thus solving the problem of negative spectral densities observed for various vertex approximations. In this work we extend this method to systems at finite temperature by formulating the cutting rules in terms of retarded N-point functions, thereby simplifying earlier approaches and simultaneously solving the issu…

Effects of elevated ozone on physiological, anatomical and ultrastructural characteristics of four common urban tree species in China

2016

Fast urbanization has led to ozone (O3) being the main pollutant in summer in most of China. To assess future ground-level O3 effects on the service of urban greening species and clarify the underlying mechanism of O3 damage, four common urban greening species, Ailanthus altissima (AA), Fraxinus chinensis(FC), Platanus orientalis (PO) and Robinia pseudoacacia (RP) were exposed to non-filtered air (NF) and to elevated O3 (E-O3) in open-top chambers. E-O3 induced visible injury in all species as well as microscopic alterations such as collapse of the palisade parenchyma cells, callose accumulation, or chloroplast and mitochondrial accelerated senescence. E-O3 significantly reduced light-satur…

What drives the adoption and consumption of green hotel products and services? A systematic literature review of past achievement and future promises

2021

The current study utilises the time-tested systematic literature review (SLR) method to identify and analyse 76 studies addressing the consumer adoption of green hotels. The results of the research profile analysis show that the literature on consumers' adoption and consumption of green hotel products and services is expanding and gaining more recognition from researchers working in Asian contexts, particularly China, Taiwan and India. Moreover, the qualitative thematic analysis yields four key themes, (a) consumer behaviour variables addressed, (b) antecedents and mediators of green hotel adoption, (c) moderators of the relationship and (d) methodological considerations, for which limitati…