1,721,067 research outputs found
Cynara cardunculus exploitation for energy applications : development of a combine head for theshing and concurrent residues collecting and utilization
Full text linkThe CRA-ING took part to the Cynara cardunculus harvesting tests organized in Spain in 2007, where UPM has experimental cultivations in the Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentario (IMIDRA) de la Consejería de Economía y Innovación Tecnológica de la Comunidad de Madrid in El Encìn, near
Alcalà De Henarez. The harvesting tests were carried out in week 33 (August 13th-17th); the cultivation was found
part in good condition of maturity, part still not ready for harvesting. The project concept, supplied to a firm that already
builds heads for maize, wheat, sunflower, soybean and so on, included the upper devices of a maize head and a
classic wheat head (without the paddle wheel) in the lower part, to obtain capitula detachment and effective threshing
and, at the same time, the stalk cut. The basic concept of the machine, to separate and thresh the capitula and to drop
in windrow the biomass and then pick it up with a baler with a minimum soil presence, was proved to be feasible. The effective working capacity was good, so the costs should be sustainable
Il pioppo conservato intero è fra i migliori in caldaia
No full textSe l'utilizzo finale del pioppo è la conversione energetica in caldaia la forma di stoccaggio preferibile rispetto a cippatura e pezzatura è la pianta intera, che raggiunge un livello di umidità finale del 17,8
L'essiccazione naturale del cippato di pioppo
No full textStoccare cippato di dimensioni grossolane (10-25 mm per il 65% del peso totale del cumulo) e senza compattamenti in fase di accumulo permette di essiccare il materiale più rapidamente e con minori perdite di sostanza secca a causa dei fenomeni fermentativ
Farm machinery conversion to energy crops
No full textThe recent Common Market Organization “sugar” has provoked deep changes to the single actors of the sugar
chain (productive means producers, machineries renters, sugar industries, seeds and chemicals suppliers).
The modifications of other Common Market Organization, as well as tobacco, are attended with the effects that they will
produce on the respective agroindustrial chains.
With the aim to reduce the costs of conversion of the agricultural farms it is necessary to preview the adaptation of
productive means to the new cultural addresses.Among the productive means, same are easily adaptable to different crops, others such as farming machineries have great
difficulties of adaptation.Among the farming machineries, the generic ones are easy adaptable to other productions or sellable, those specialized for a single crop (such as sugar beet or tobacco harvesters) do not find spaces on the market of the used one and therefore it is necessary to verify the possibility of adaptation to new cultivations
Consequence of SRF poplar wood harvesting method on energy content preservation
Full text linkAs renewable energy demand increases, SRF poplar cultivation is getting more and more important in energy
production. SRF harvesting takes place normally between December and March: storage between April and November is
therefore necessary, pointedly concerning the energetic quality of the material, that depends by harvesting method and the
product dimensions. Today three different harvesting methods are available, turning out respectively whole plants, chunks
and chips. Weather conditions and microbiological activities produce a dry matter reduction, hence energy loss. A
measurement of the energy content of the SRF poplar cultivation was made during the harvesting. During the storage period
were registered temperature, rainfall, humidity and solar radiation. Temperature inside the piles was also monitored at
different heights. After the piles opening were measured moisture content, ash content, and heating. Whole trees and chunks
have lower energy losses if compared with chips. On the other side, transport and following treatments, more difficult for
the whole plants, will have an impact on the economy and energy balance of the productive chain. Both chips and chunks
can constitute, in appropriate plants, the final form of fuel, while whole plants must always be processed.
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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