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Search Results: 1 - 10 of 462204 matches for " A. Magnani "
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Modeling Italian forests: state of the art and future challenges
Vacchiano G,Magnani F,Collalti A
iForest : Biogeosciences and Forestry , 2012, DOI: 10.3832/ifor0614-005
Abstract: This review is a follow-up to the first meeting of the Forest modeling working group (FMWG) of the Italian Society of Silviculture and Forest Ecology (SISEF), held in December 2009. 18 talks were delivered to an audience of 40 researchers. We review the state of the art of forest ecosystem modeling in Italy, highlight findings from Italian research groups, and summarize relevant issues. Developing on the discussion session of the meeting, we indicate current research gaps and future challenges for modelers, forest ecologists and foresters alike, with a special emphasis on model validation, data availability, and communication between researchers and managers.
Effects of long-term water shortage on Mediterranean pine forests: lessons from two experiments carried out in southern Italy
Borghetti M,Cinnirella S,Magnani F,Saracino A
Forest@ , 2005,
Growth patterns of Pinus sylvestris across Europe: a functional analysis using the HYDRALL model
Magnani F,Nolè A,Ripullone F,Grace J
iForest : Biogeosciences and Forestry , 2009, DOI: 10.3832/ifor0516-002
Abstract: The variability of Pinus sylvestris growth over two geographic transects across Europe has been explored through a process-based forest growth model (Hydrall: HYDRaulic constraints on ALLocation) which accounts for the effects of environmental conditions not only on short-term gas exchanges, but also on allocation and tree structure. The model has been validated against both eddy-covariance and growth data under contrasting environmental conditions. Forest growth was found to be reduced by low temperatures (-50%) and water stress (-37%) at the opposite extremes of the natural range of the species. Application of a functional model made it possible to partition growth reductions between individual processes. Gross primary production was severely affected by low temperatures and short vegetative periods at the northern extreme of the specific range (-53%), and by low air and soil humidity at the southern limit (-26%). The ratio between net and gross primary production was found to be rather constant across the temperate region, only increasing in the boreal zone in response to low temperatures (+20%). Under dry conditions, on the contrary, a substantial proportion of the reduction in aboveground productivity was attributed to the need to allocate increasing amounts of resources to fine root production and maintenance (+16%). Both short and long-term responses should be considered in the prediction of climate change impact on forests.
Disease activity assessment in large vessel vasculitis
L. Magnani,A. Versari,D. Salvo,M. Casali
Reumatismo , 2011, DOI: 10.4081/reumatismo.2011.86
Abstract: Disease activity assessment in large vessel vasculitis (LVV) is often challenging for physicians. In this study, we compared the assessment of disease activity based on inflammatory markers, clinical indices (Indian Takayasu Activity Score [ITAS] and the Kerr/National Institute of Health indices [Kerr/NIH]), and 18F-Fluorodesossiglucose (FGD) vascular uptake at positron emission tomography (Pet). We found that Pet results did not statistically correlate with the clinical indices ITAS and Kerr/NIH, because FDG uptake was increased (grade>2 on a 0-3 scale in at least one evaluated vascular segment) in many patients with inactive disease according to clinical and laboratory parameters (i.e., negative ITAS and Kerr/NIH indices as well as normal erythrocyte sedimentation rate (ESR) and C-reactive protein (PCR)). Similarly, interleukin- 6 and its soluble receptor did not statistically correlate with disease activity. In contrast, clinical indices showed a significant correlation between each other and with inflammatory markers (VES and PCR). These data suggest that while clinical indices and inflammatory markers may be useful to assess disease activity, Pet may be more sensitive.
Molecular gas and stars in the translucent cloud MBM 18 (LDN 1569)
J. Brand,J. G. A. Wouterloot,L. Magnani
Physics , 2012, DOI: 10.1051/0004-6361/201219822
Abstract: Seven of ten candidate H-alpha emission-line stars found in an objective grism survey of a 1 square degree region in MBM 18, were observed spectroscopically. Four of these have weak H-alpha emission, and 6 out of 7 have spectral types M1-M4V. One star is of type F7-G1V, and has H-alpha in absorption. The spectra of three of the M-stars may show an absorption line of LiI, although none of these is an unambiguous detection. For the six M-stars a good fit is obtained with pre-main-sequence isochrones indicating ages between 7.5 and 15Myr. The molecular cloud mass, derived from the integrated 12CO(1-0) emission, is 160Mo (for a distance of 120pc), much smaller than the virial mass (10^3Mo), and the cloud is not gravitationally bound. Nor are the individual clumps we identified through a clump-finding routine. Considering the relative weakness or absence of the H-alpha emission, the absence of other emission lines, and the lack of clear LiI absorption, the targets are not T Tauri stars. With ages between 7.5 and 15Myr they are old enough to explain the lack of lithium in their spectra. Based on the derived distances (60-250pc), some of the stars may lie inside the molecular cloud (120-150pc). From the fact that the cloud as a whole, as well as the individual clumps, are not gravitationally bound, in combination with the ages of the stars we conclude that it is not likely that (these) stars were formed in MBM 18.
Carbon, energy and forest biomass: new opportunities and needs for forest management in Italy
Magnani F
Forest@ , 2005,
Abstract: Forest biomass provides a relevant fraction of world energy needs, not only in developing Countries. In Italy, several factors are presently contributing to a new interest for this resource, ranging from regulatory quotas for renewables to the increasing price of fossil fuel to the emergence of a European carbon stock exchange. This focus on renewable resources constitutes an important opportunity for the forest sector and for society by and large, but because of the potential dimensions of the emerging market it also requires new planning instruments, in order to avoid a sudden and widespread resumption of coppice management and a reduction of standing carbon stock in forest ecosystems, which would run contrary to the objectives of the Kyoto Protocol. An example of the future demand for biomasses in Central Italy is presented, based on the possible use of fuelwood in new coal-fired power plants by the 'co-firing' technology.
Il turismo della memoria e i luoghi dell’Unità d’Italia / Tourism, memory and the places of the unification of Italy
Magnani, Elisa
Storicamente , 2011,
Abstract: The Unification of Italy may be celebrated with modern forms of pilgrimage in the places where the Unification was built, places of the collective cultural heritage of our country, connected to the recovery of memory of this past event. In this paper we will analyse the existing literature on the issues of memory and tourism and on the role of tourism in shaping the collective memory and the national identity of a population and we will discuss how the celebrations for the 150th anniversary of the unification of Italy are promoting the cultural heritage, both material and immaterial, it has produced.
Por caminos migrantes hacia la conciencia de una identidad abierta
Ilaria Magnani
Altre Modernità , 2009,
Abstract: The stifling Argentinean dictatorship has elicited a series of reflections on Argentineans's cultural roots and, at the same time, it has called into question the notion of Argentinean exceptionalism. All this has brought to re-think and to re-evaluate the migratory past of Argentina, especially in light of the economic policy of the country that lead to the 2001 default. The political and economic events have had their reflections on the literary production, in particular on memoirs and pseudo-memoirs. The object of my essay is the work of AntonioDal Masetto, mostly known for his novels about migration. In particular, I will focus on his most recent writing in which the condition of the migrant is no longer a personal and familial concern but it becomes a contemporary and universal paradigm. For the purpose of my essay, I will use the by-now classic theories of Edouard Glissant, Jacques Derrida and Loretta Baldassar about migration.
Ripensare l’immigrazione. Conversazioni con Griselda Gambaro, Mempo Giardinelli, Roberto Raschella, Alicia Steimberg, Héctor Tizón, Rubén Tizziani
Ilaria Magnani
Altre Modernità , 2009,
Abstract: Ripensare l'immigrazione. Conversazioni con Griselda Gambaro, Mempo Giardinelli, Roberto Raschella, Alicia Steimberg, Héctor Tizón, Rubén Tizziani
Proyectos identitarios en la construcción del Museo Nacional de la Inmigración de Buenos Aires
Ilaria Magnani
Altre Modernità , 2011,
Abstract: Visiting the National Immigration Museum is the occasion to think over the relation between a Country and its immigration history. Retrieving the memory of the transoceanic migration to Argentina which characterized the last decades, is a process based upon the complex interconnection between the individual level and the general one; and whereas immigration as a mass phenomenon turns into an individual experience, the personal recollection is the tool that allows us to reconstruct the past social project and also to give shape to the existing National identity. Thus the Museum acts as safeguard for the immigration memory and at the same time for the political institutional legitimisation and it represents the promise of a prosperous future like the last decades did.
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