1,721,026 research outputs found
Clima e cambiamento climatico. II . dati osservativi, paleoclimatologia, modelli climatici, attività internazionali
No full textClima e cambiamento climatico I. Profilo storico, atmosfera e clima,variabilità del clima, ruolo delle nubi 4-18 (1)
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Preliminary analysis of surface radiation measurements recorded at the Nansen ice sheet (Antarctica)
No full textAn experiment on radiation and surface energy balance was conducted during the 9th Italian expedition in Antarctica at the Nansen ice sheet, a glacier situated close to the Italian base at Terra Nova Bay, to correlate surface balances to the formation and development of katabatic winds. Measurements were taken by radiometers covering the whole spectra of solar and terrestrial emissions and by fast sensors of atmospheric wind velocity and humidity for the application of the eddy correlation technique. A preliminary analysis of the radiotive energy balance during the Antarctic summer in clear-sky conditions is reported and discussed. The findings show the very low available energy (mean about 1 W/m2), in terms of net radiation, for the physical processes such as sensible- and latent-heat fluxes. Long-wave radiation balance was applied to estimate the reliability of the Swinbank's parametrization, relative to general conditions of the atmosphere
International Symposium on Greener Cities for More Efficient Ecosystem Services in a Climate Changing World
No full textThe idea of garden is expressed, for the first time in history, by the Mesopotamian civilization as early as the IV millennium BCE as drawings and poetry texts showing a wall fencing one single tree. This is the first representation of the idea of sheltering/protecting a tree by human artifacts and, in its simplest form, brings the idea of the tight relationship between horticulture and urban environment. The "jardinu" of Pantelleria, a drystone wall shaped into an open-top tower encircling a single citrus tree, fully matches both in its founding idea and its physical implementation the elemental idea of the Mesopotamian garden. Such traditional growing system, developed in Pantelleria to cope with water scarcity, is an artifact at the service of households, fully integrated into the urban settlements of the Island and providing a valuable source of fresh fruit to families despite the lack of irrigation water. Currently, as many as 500 of such structures are still active in Pantelleria, standing as the distinguishing landmarks of the island. The simple, albeit expensive, principle of enclosing a tree inside a protective wall has many effects on the surrounding environment and on the eco-physiological behavior of the tree itself. We discuss here this system from the point of view of the interactions between the tree and the enclosing wall, focusing on the ability of the "Pantelleria citrus garden" to affect the water cycle of the tree and to avoid irrigation at all. Our analysis shows beyond simple, easily recognizable effects such as wind protection and the related reductions in transpiration, diurnal thermal dynamics of wall's stones actively affects the water balance of the system. Implications of this analysis suggest that the knowledge behind the empirical building-rules developed over the years for the construction of such structures are expression of the physical principles underlying the environmental dynamics of the "Pantelleria citrus garden"
The Perceptions and Attitudes of Residents Towards Urban Green Spaces in Emilia-Romagna (Italy)—A Case Study
Full text linkRapid urbanisation has highlighted the importance of urban green spaces (UGS) in promoting environmental sustainability and human wellbeing, yet the gap between urban planning practices and community preferences remains a significant challenge. This study investigated residents' perceptions and attitudes towards UGS in a neighbourhood of an Italian city (Quartiere Marconi, Imola), focusing on understanding both the strengths and limitations of existing public green spaces from users' perspectives. Through a comprehensive questionnaire survey of 126 residents, we examined the associations between socio-demographic characteristics and four aspects of UGS utilisation: visiting purposes, barriers to visits, satisfaction levels, and suggestions for improvement. Chi-square tests were conducted to identify significant relationships. The results indicate that life stage, rather than scattered socio-demographic factors, plays a crucial role in shaping UGS perceptions and usage patterns. Particularly, the 31-45 and 46-60 age groups, characterised by family-caring and career responsibilities, showed distinct preferences for social activities, while individual users focused more on nature enjoyment. Although accessibility was generally sufficient, satisfaction levels varied significantly based on living arrangements, with families emphasising facility-related issues and individual users prioritising natural features. These findings suggest that successful UGS planning requires attention to both high-quality natural elements and user-oriented facilities to meet the diverse needs of different life stages. This study represents the preliminary phase of a project, which concerns the redevelopment of the area under study, in order to create a more inclusive and high-quality UGS, taking into account the needs of the resident population
Indagine sui flussi di materia ed energia da vigneto e da terreno nudo nell’interfilare in un sistema viticolo dell’Italia Centrale.
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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