1,721,837 research outputs found
Ferrari Giovanni — Il Friuli
No full textC A. Ferrari Giovanni — Il Friuli. In: Population, 21ᵉ année, n°1, 1966. p. 159
MULTICRITERIA MODEL OF OPTIMAL EXPLOITATION OF THE BIOMASSES BASED ON DIFFERENT DEVELOPMENT SCENARIOS
Full text linkBioenergy represents one of the key sectors for building a sustainable energy system. In particular, one of the most critical aspects of energy production of any kind is the location of plants and their inclusion within the industrial and social fabric. Local and national governments are faced with making decisions that are often difficult, affected by many factors and with significant consequences for many people and environments. To determine the optimal location of plants, it is essential to apply effective decision-making processes in which technical decisions are used with a scientific method, considering the wishes of the stakeholders and environmental needs. In the bioenergy field, the traditional system of the farm plant, fueled by the biomass produced internally by the firm, must be complemented, and in some cases replaced, by district plants, appropriately located with the agreement of local administrations and citizens. In this thesis, a study is presented for the optimal location of biogas and biomethane plants, aiming to maximise the use of biomass and reduce the impact on the territory. The main objective of this thesis is to provide an adequate and comprehensive and, at least in theory, replicable methodology for choosing a site where to install a plant. This goal was achieved in three steps. First, the bioenergy potential of the area was calculated, analyzing the geographical and production context and the chemical and physical characteristics of biomass. Next, economic, environmental and social factors related to biomass exploitation and their impact on the benefits and problems associated with bio-resource exploitation were studied. Finally, the optimal location of facilities to maximize environmental, social and economic benefits was determined. The different reviewed scenarios prove the importance of careful spatial analysis and close dialogue with local stakeholders to establish the investigation and identify priorities to be pursued. Future studies could apply the findings of this thesis to other forms of renewable energy, serving private citizens, entrepreneurs and public institutions in building a sustainable energy system.Bioenergy represents one of the key sectors for building a sustainable energy system. In particular, one of the most critical aspects of energy production of any kind is the location of plants and their inclusion within the industrial and social fabric. Local and national governments are faced with making decisions that are often difficult, affected by many factors and with significant consequences for many people and environments. To determine the optimal location of plants, it is essential to apply effective decision-making processes in which technical decisions are used with a scientific method, considering the wishes of the stakeholders and environmental needs. In the bioenergy field, the traditional system of the farm plant, fueled by the biomass produced internally by the firm, must be complemented, and in some cases replaced, by district plants, appropriately located with the agreement of local administrations and citizens. In this thesis, a study is presented for the optimal location of biogas and biomethane plants, aiming to maximise the use of biomass and reduce the impact on the territory. The main objective of this thesis is to provide an adequate and comprehensive and, at least in theory, replicable methodology for choosing a site where to install a plant. This goal was achieved in three steps. First, the bioenergy potential of the area was calculated, analyzing the geographical and production context and the chemical and physical characteristics of biomass. Next, economic, environmental and social factors related to biomass exploitation and their impact on the benefits and problems associated with bio-resource exploitation were studied. Finally, the optimal location of facilities to maximize environmental, social and economic benefits was determined. The different reviewed scenarios prove the importance of careful spatial analysis and close dialogue with local stakeholders to establish the investigation and identify priorities to be pursued. Future studies could apply the findings of this thesis to other forms of renewable energy, serving private citizens, entrepreneurs and public institutions in building a sustainable energy system
Active vibration control of a sandwich plate by non-collocated positive position feedback
No full textThe active vibration control of a free rectangular sandwich plate by using the Positive Position Feedback (PPF) algorithm was experimentally investigated in a previous study. Four normal modes were controlled by four nearly collocated couples of piezoelectric sensors and actuators. The experimental results of the control showed some limitation, especially in the Multi-Input Multi-Output (MIMO) configuration. This was attributed to the specific type of sensors and their conditioning, as well as to the phase shifts present in the vibration at different points of the structure. An alternative approach is here undertaken by abandoning the configuration of quasi-perfect collocation between sensor and actuator. The positioning of the piezoelectric patches is still led by the strain energy value distribution on the plate; each couple of sensor and actuator is now placed on the same face of the plate but in two distinct positions, opposed and symmetrical with respect to the geometric center of the plate. Single-Input Single-Output (SISO) PPF is tested and the transfer function parameters of the controller are tuned according to the measured values of modal damping. Then the participation matrices necessary for the MIMO control algorithm are determined by means of a completely experimental procedure. PPF is able to mitigate the vibration of the first four natural modes, in spite of the rigid body motions due to the free boundary conditions. The amplitude reduction achieved with the non-collocated configuration is much larger than the one obtained with the nearby collocated one. The phase lags were addressed in the MIMO algorithm by correction phase delays, further increasing the performance of the controller
Sulfate influx and efflux in seedlings of maize genotypes of different productivity [in Italy]
No full textDifferenze genetiche nell' efficienza di assorbimento dei nutrienti rivelate dalle cinetiche di influsso ed efflusso del solfato in plantule di mais
No full textFlora overo cultura di fiori : distinta in quattro libri
No full textdel P. Gio. Battista Ferrari Sanese della Comp. di Giesủ ... e trasportata dalla lingua Latina nell' Italiana da Lodovico Aureli PeruginoKupfertite
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
Development of Sulfate Uptake Capacity and ATP-Sulfurylase Activity during Root Elongation in Maize
No full textSulfate uptake capacity and ATP-sulfurylase activity were determined in maize roots (Zea mays L. var. XL 363 and mutant XL 363 o2) at increasing root length. The pattern of uptake showed a close similarity to that of ATP-sulfurylase, both activities reaching the maximum level at 9 and 10 cm root length in the XL 363 and XL 363 o2 hybrids, respectively. In addition to the shift of the maximum, opaque-2 mutation caused an enhancement of the two activities at root length below and above the activity peak. The kinetic parameter of uptake, Km, showed a maximum at 3 to 4 and a minimum at 7 to 8 cm. The isoenzyme pattern of ATP-sulfurylase was the same in the two hybrids and did not change with root elongation. A common regulatory mechanism is postulated for uptake and activation of sulfate. The kinetic behavior is interpreted as an index of flexibility of the transport system toward different nutrient status of the environmen
Differences in physiological and molecular aspects of sulfate uptake in two maize hybrids
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