oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 10 )

2019 ( 689 )

2018 ( 818 )

2017 ( 752 )

Custom range...

Search Results: 1 - 10 of 461903 matches for " Cutini A "
All listed articles are free for downloading (OA Articles)
Page 1 /461903
Display every page Item
Considerations about the forester’s silence on the ”Bambi di Alessandria“ issue.
Cutini A
Forest@ , 2006,
Abstract: Last summer, a claim on the Italian mass-media was raised following the decision of the Piedmont region to authorize a selective hunting on 600 roe deers. Almost everyone participated in the debate, in most cases with emotional considerations, overwhelming the opinions of experts. Unfortunately, the only “absents” have been the representatives of foresters. On the contrary, foresters could have brought important arguments and data to contribute in the debate, considering the impact of deer on the forest environment. An integrated management of wildlife and forest resources is possible, but it is necessary to contribute with real arguments in a debate, in which foresters do have the knowledge, the capacities and the duty to raise their voice.
Effects of thinning and mixed plantations with Alnus cordata on growth and efficiency of common walnut (Juglans regia L.)
Cutini A,Giannini T
Forest@ , 2009, DOI: 10.3832/efor0553-006
Abstract: Results about the effects of thinning and mixed plantations with Italian alder (Alnus cordata Loisel.) on growth and efficiency of common walnut (Juglans regia L.) plantations for wood production are reported. The study, carried out for six years on sixteen year old plantations, compared three theses: pure common walnut plantation (pure common walnut); 50% common walnut - 50% Italian alder plantation; 25% common walnut - 75% Italian alder plantation. Beyond annual surveys of girth at breast height, total height, stem volume and biomass, several variables, useful to describe canopy and foliage characteristics such as leaf area index (LAI), leaf biomass and photosynthetic active radiation below the canopy, were recorded. Data collected allowed to compare growth at individual and whole stand level, to calculate the net assimilation rate (NAR) and to compare the growth efficiency of the three theses. Mixed plantations performed results significantly higher than the pure plantation in terms of growth, LAI and leaf biomass both before and after experimental thinning. With reference only to common walnut, growth in mixed plantations was higher than the pure plantation with differences ranging from +40% to +100%. More relevant differences among pure common walnut, 50% common walnut and 25% common walnut at canopy and foliage characteristics were observed, with LAI values of 1.07, 3.96 e 4.35 m2 m-2 respectively. Results accounted for a general positive effect of Italian alder as accessory tree species on growth and efficiency of mixed plantations, mainly due to the good performances induced in common walnut trees. Such performances were enabled by the good ecological integration between the two species and by the positive effects of N-fixing activity of Italian alder. Experimental thinning applied, although heavy, did not biased the dynamics observed before thinning both in pure and mixed plantations. In addition, they had positive effects on common walnut growth and especially on radial increment, a very important matter being common walnut the target species with a very appreciated and valuable wood.
Digital hemispherical photography for estimating forest canopy properties: current controversies and opportunities
Chianucci F,Cutini A
iForest : Biogeosciences and Forestry , 2012, DOI: 10.3832/ifor0775-005
Abstract: Hemispherical photography has been used since the 1960s in forest ecology. Nevertheless, specific constraints related to film cameras have progressively prevented widespread adoption of this photographic method. Advances in digital photographic technology hold great promise to overcome the major drawbacks of hemispherical photography, particularly regarding field techniques and image processing aspects. This contribution is aimed to: (i) provide a basic foreground of digital hemispherical photography; (ii) illustrate the major strengths and weakness of the method; (iii) provide an reliable protocol for image acquisition and analysis, to get the most out of using hemispherical photography for canopy properties extraction.
Dead wood characterisation in Quercus frainetto stands in Calabria (Southern Italy)
Barreca L,Cutini A,Mercurio R
Forest@ , 2008, DOI: -
Abstract: Pan European Indicators for Sustainable Forest Management (SFM) recognized dead wood as an indicator in the assessment of the biodiversity and naturalness of forests ecosystems. Dead wood plays an important role in limiting atmospheric CO2 levels as well. The aim of this work was to produce data about the quantities and the quality of dead wood. In this context investigations have been carried out in Quercus frainetto stands in two protected areas in southern Italy. Dead wood was divided into: coarse woody debris (CWD), standing dead trees (SDT), litter and stumps. The average volume of CWD was 5.3 m3 ha-1 while the average volume of SDT was 3.6 m3 ha-1. Average total litter production was 4.6 Mg ha-1 and stumps average volume was 0.4 m3 ha-1. Total carbon stored in dead wood was 3.1 Mg C ha-1. Observations and comments on the dead wood management in Quercus frainetto stands in Mediterranean area are reported.
Allometric relationships for volume and biomass for stone pine (Pinus pinea L.) in Italian coastal stands
Cutini A,Chianucci F,Manetti Maria Chiara
iForest : Biogeosciences and Forestry , 2013, DOI: 10.3832/ifor0941-006
Abstract: Tree biomass plays a key role in sustainable forest management and in determining forest carbon stocks. Accurate estimates based on species-specific empirical data are necessary for regional and national inventories and forest carbon management. In this study, we obtained allometric relationships for volume and aboveground biomass for stone pine (Pinus pinea) based on empirical data collected in four coastal stands in Italy. Root sampling was also performed. The results enabled generalized equations for volume and aboveground biomass to be developed. However, an analysis also showed several differences in biomass allocation in stone pine resulting from different stand characteristics, emphasizing the importance of stand-dependent factors for adjusting regional or national biomass calculations. Biomass expansion factors were also provided. This study provides tools to help forest managers in quantifying volume and biomass, thereby contributing to the accurate estimation of carbon sequestration and stocks in stone pine stands in Italy.
Development of the tree and shrub component and recovery techniques in a burnt pine forest, Castel Fusano, Rome
Manetti MC,Cutini A,Gugliotta OI,Hajny M
Forest@ , 2007,
Abstract: A five-year study (2000-2005) was established in a part of Castel Fusano (Rome) pinewood burned in 2000. The aims of the research were: i) to analyse the behaviour of the coenoses after fire; ii) to verify the post-fire growth and canopy recovery of the Mediterranean maquis; iii) to evaluate natural regeneration of italian stone pine (Pinus pinea L.); iv) to verify the effectiveness of italian stone pine plantation in enhancing the establishment of the forest cover. Permanent research plots were established to evaluate features and dynamics of the Mediterranean maquis as well as mortality and development of 1-year-old italian stone pine (ca.500 ha-1) seedlings. Two different plantation systems were applied: blocks of three seedlings at 8x8 m distance; one seedling at 5x5 m distance. After five growing seasons from the fire, only 700 stools ha-1 have resprouted, mainly holm oak (48%), whose only 38% of good vigour. Canopy cover of the broad-leaved species is not enough to assure a quick forest establishment. Combined pine plantation with the maquis species, has given satisfactory results, though the mortality was quite high because of the game damages. The block planting performed better for growth and survival of seedlings. This last plantation system could be a rational choice to assure, in a relative short time, forest recovery and mixed stands characterised by a considerable presence of natural vegetation.
Litterfall and Leaf Area Index in the CONECOFOR Permanent Monitoring Plots
Andrea CUTINI
Journal of Limnology , 2002, DOI: 10.4081/jlimnol.2002.s1.62
Abstract: Forest canopies are more sensitive and react more promptly to abiotic and biotic disturbances than other stand structural components. Monitoring crown and canopy characteristics is therefore a crucial issue for intensive and continuous monitoring programs of forest ecosystem status. These observations formed the basis for the measurement of annual litter production and leaf area index (LAI) in the Italian permanent monitoring plots (CONECOFOR program) established within the EC-UN/ECE program "Intensive Monitoring (Level II) of Forest Ecosystems". Preliminary results after three years of observation are presented. The low value of within plot mean relative standard deviation (20.8 ± 1.9%) of litter production, which in any case never exceeded 30%, accounted for the good sampling error and accuracy of the chosen method, which seems to be accurate enough to detect changes in litter production through the years. The higher inconsistency of the amount of woody and fruits fractions over the years demonstrated the greater reliability of leaf fraction or, on the other hand, of LAI compared to total litter. Mean values of annual leaf-litter and total litter production and LAI were rather high in comparison with data reported in literature for similar stands, and reflected both a medium-high productivity and a juvenile phase in the development of the selected stands on average. Focusing on changes in litter production through the years, statistical analysis on a sub-sample of plots showed the existence of significant differences both in leaf litter and total litter production. These findings seem to attribute to the "year" factor a driving role in determining changes in litter production and LAI. Temporal intermittence in data collection, together with the shortness of the monitoring period, make it difficult to speculate or arrive at definitive conclusions on changes in litter production due to time-dependent factors. The importance of having a complete database to increase index representativeness and reliability and, on the other hand, of performing an integrated results analysis which takes into account the outcomes of other research actions, is recognized as an indispensable requirement for achieving the goals of the monitoring program.
2FHL: The second Catalog of hard {\it Fermi}-LAT sources
M. Ajello,A. Domínguez,D. Gasparrini,S. Cutini,for the Fermi-LAT Collaboration
Physics , 2015,
Abstract: The {\it Fermi} Large Area Telescope (LAT) has been routinely gathering science data since August 2008, surveying the full sky every three hours. The first Fermi-LAT catalog of sources detected above 10 GeV (1FHL) relied on three years of data to characterize the $>$10 GeV sky. The improved acceptance and point-spread function of the new Pass 8 event reconstruction and classification together with six years of observations now available allow the detection and characterization of sources directly above 50 GeV. This closes the gap between ground-based Cherenkov telescopes, which have excellent sensitivity but small fields of view and short duty cycles, and all-sky observations at GeV energies from orbit. In this contribution we present the second catalog of hard Fermi-LAT sources detected at $>$50\,GeV.
Searching for Ariadne’s thread. Some remarks on urban resilience and orientation Searching for Ariadne’s thread. Some remarks on urban resilience and orientation
Giovanni Rabino,Valerio Cutini
TeMA : Journal of Land Use, Mobility and Environment , 2012, DOI: 10.6092/1970-9870/889
Abstract: This paper concerns the methods of analysis of the configuration of the urban grids. More in details, it will focus on the configurational approach to the analysis of urban settlements, briefly presenting the different methods and techniques it has inspired, sketching their features, highlighting their actual utility and reminding their respective advantages and limits. Moreover, it will propose the use of some further configurational parameters, suitable for describing and reproducing interesting features of urban settlements; more in details, it will cast attention onto the richness and the variety of paths within a settlement, what makes it resilient, that is capable of sustaining changes and transformations without radically modifying its inner geography. Such parameters have been tested on the case studies of Pisa and Venice, which can easily be recognised as particularly relevant and significant, in that the results they provide are diametrically different. Those outputs will then be presented and discussed; the findings are suitable for suggesting resilience as a singular clue for urban orientation, so that the configurational techniques can be proposed as a tool for evaluating and predicting this spatial attitude, here finding an Ariadne’s thread for urban wayfinding. This paper concerns the methods of analysis of the configuration of the urban grids. More in details, it will focus on the configurational approach to the analysis of urban settlements, briefly presenting the different methods and techniques it has inspired, sketching their features, highlighting their actual utility and reminding their respective advantages and limits. Moreover, it will propose the use of some further configurational parameters, suitable for describing and reproducing interesting features of urban settlements; more in details, it will cast attention onto the richness and the variety of paths within a settlement, what makes it resilient, that is capable of sustaining changes and transformations without radically modifying its inner geography. Such parameters have been tested on the case studies of Pisa and Venice, which can easily be recognised as particularly relevant and significant, in that the results they provide are diametrically different. Those outputs will then be presented and discussed; the findings are suitable for suggesting resilience as a singular clue for urban orientation, so that the configurational techniques can be proposed as a tool for evaluating and predicting this spatial attitude, here finding an Ariadne’s thread for urban wayfinding.
Prefrontal cortex activation during story encoding/retrieval: a multi-channel functional near-infrared spectroscopy study
Simone Cutini,Marco Ferrari
Frontiers in Human Neuroscience , 2013, DOI: 10.3389/fnhum.2013.00925
Abstract: Encoding, storage and retrieval constitute three fundamental stages in information processing and memory. They allow for the creation of new memory traces, the maintenance and the consolidation of these traces over time, and the access and recover of the stored information from short or long-term memory. Functional near-infrared spectroscopy (fNIRS) is a non-invasive neuroimaging technique that measures concentration changes of oxygenated-hemoglobin (O2Hb) and deoxygenated-hemoglobin (HHb) in cortical microcirculation blood vessels by means of the characteristic absorption spectra of hemoglobin in the near-infrared range. In the present study, we monitored, using a 16-channel fNIRS system, the hemodynamic response during the encoding and retrieval processes (EP and RP, respectively) over the prefrontal cortex (PFC) of 13 healthy subjects (27.2 ± 2.6 years) while were performing the “Logical Memory Test” (LMT) of the Wechsler Memory Scale. A LMT-related PFC activation was expected; specifically, it was hypothesized a neural dissociation between EP and RP. The results showed a heterogeneous O2Hb/HHb response over the mapped area during the EP and the RP, with a O2Hb progressive and prominent increment in ventrolateral PFC (VLPFC) since the beginning of the EP. During the RP a broader activation, including the VLPFC, the dorsolateral PFC and the frontopolar cortex, was observed. This could be explained by the different contributions of the PFC regions in the EP and the RP. Considering the fNIRS applicability for the hemodynamic monitoring during the LMT performance, this study has demonstrated that fNIRS could be utilized as a valuable clinical diagnostic tool, and that it has the potential to be adopted in patients with cognitive disorders or slight working memory deficits.
Page 1 /461903
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.