1,721,010 research outputs found
Lavoro di squadra nell'antincendio boschivo
No full textThe paper deals with the main factors for an efficient and effective work of a forest fire team. The analysed factors are: mutual knowledge; harmony and concordance between the team members; clear definition of the objectives to reach; clearness in tasks, rules and responsabilities structure; members' skills and aptitudes evaluation, respect of guide procedures, coordination by a leader and time availability. Then, some activities of experiential training are proposed; these activities, through the carrying out of deeply involving trials from the psychophisic point of view, allow the development of every single considered aspect. The trials imply the envolvement of all team members, allowing to test collaboration between different rules and emphasizing the importance of comunication, listening, planning and definition of specific procedures to reach prefixed objectives. Moreover, the rule of the different types of practical exercises in the development and growing of the team are emphasized and some organizational strategies to improve the productivity and stimulus to work are proposed
Funzioni, ruolo ed esigenze formative del direttore delle operazioni di spegnimento (parte seconda)
No full textThe paper deals with the role and the training program of the Incident Commander (I.C.), whose task is so deeply complex that needs an ad hoc training program organisation. An ideal training model is proposed, pointing out the peculiarities, specifying the subjects-matter, identifying the practical and the theoretical topics, the didactic modalities and tools to be used in the classroom lectures and in the practices, underlining the effectiveness of the scenario’s simulation, that must be realized as real and detailed as possible, using all the available resources. Training proposed is a lifelong learning pattern that means competences’ maintenance through a constant updating
Funzioni, ruolo ed esigenze formative del direttore delle operazioni di spegnimento (parte prima)
No full textThe paper deals with the functions of the Incident Commander (I.C.), whose task is so deeply complex that needs an ad hoc training program organisation. I.C.’s functions, among which there are the decision making process, the communication and the coordination, are analysed, emphasizing the critical factors, and examining carefully the I.C.’s character and behavioural profile
Schiume antincendio boschivo di classe A. Comportamento in ambiente prealpino
No full textThe paper analyses the effective durabilty of a class A foam (Phos-Check WD 881) in different conditions of use. A test has been carried out in the prealpine area of the Belluno Province in the North-eastern part of Italy. The foam has been distributed in two different periods (autumn and summer), at three different concentrations (0.3% 0.6% 0.9%) and on four different surfaces (bared soil, meadow, broad-leaved floor and coniferous floor). The effective durability of the foam ranges from 20 minutes to 140 minutes. The concentration 0.9% offers the best results in both the two periods of the year and on the four substrates but it must be considered that during the summer it is more convenient to use the concentration 0.3% because it allows to obtain almost the same results of the concentration 0.9% saving the 75% of the concentrate
Adaptation of a 4WD tractor for wood extraction in steep terrain
No full textIn North-eastern Italian Alps wood extraction in steep terrain (up to 25-30%) is generally performed by means of 4WD agricultural tractors equipped with winches. One problem associated with the use of agricultural tractor in forestry, especially in off-road moving in steep terrain, is the stability and hence operator’s safety. In order to overcome such a problem an adaptation of a 4WD agricultural tractor for wood extraction in steep terrain has been developed. It considers different features especially designed to be installed on an agricultural tractor. The first feature consists in a self-levelling device, made by two arms, articulated on the tractor’s final drive box and moved by two hydraulic rams. On the end of each arm a free-turning bogie is mounted. Another feature is the elongation of the fork in which the front axle is articulated, in order to increase its tilting angle. Two side plates, bolted on the rear body of the tractor, represent the last feature. The plates allow moving the p.t.o. shaft and the three-point linkage to the back permitting the use of the mounted winch. The control of the levelling device is both automatic and manual. When manually operated the levelling device is controlled by means of a single lever on the right side arm of the operator’s seat. The adapted tractor has demonstrated to operate in efficient and safe way on sloping and rough terrain
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
Nuclear Magnetic Resonance Reveals Molecular Species in Carbon Nanodot Samples Disclosing Flaws
Full text linkCarbon nanodots are currently one of the hot topics in the nanomaterials world, due to their accessible synthesis and promising features. However, the purification of these materials is still a critical aspect, especially for syntheses involving molecular precursors. Indeed, the presence of unreacted species or small organic molecules formed during solvothermal treatments can affect the properties of the synthesized nanomaterials. To illustrate the extreme importance of this issue, we present two case studies in which insufficient purification results in misleading conclusions regarding the chiral and fluorescent properties of the investigated materials. Key to identify molecular species is the use of nuclear magnetic resonance, which proves to be an effective tool. Our work highlights the need to include nuclear magnetic resonance as a standard characterization technique for carbon-based nanomaterials, to minimize the risk of observing properties that arise from molecular species, rather than the target carbon nanodots
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