1,721,036 research outputs found
Economia Circolare = comunica la sostenibilità
No full textL'articolo presenta sinteticamente il progetto di comunicazione ambientale "Economia Circolare =", realizzato con 32 studenti di Design dell'Università Iuav di Venezia. Svolto nel luglio 2019, il progetto era parte della ricerca “Opportunità - Sinergie Circolari per un Mercato Efficiente. Formazione e reti per l'acquisto, il recupero e il riutilizzo”, ideata e diretta dal gruppo di ricerca del prof. Musco (Iuav) e finanziato dal Fondo sociale europeo 2014-2020. Il progetto ha vinto il premio internazionale di Information Design IIIDAward nel 2020
Circular Design Strategies
No full textLe istanze della transizione verso gli obiettivi della Nuova strategia industriale europea richiedono un passaggio dalla logica della minimizzazione a quella di modelli rivolu- zionari di consumo e produzione che vanno oltre al concetto di sostenibilità. Partendo dai risultati della ricerca Circular Design Maps condotta presso l’Università Iuav di Venezia, il presente contributo intende offrire una riflessione critica sull’urgenza di un netto cambio di prospettiva nella pratica del design, elemento centrale in tali processi in quanto agisce nella fase iniziale che si stima possa incidere su circa l’80% degli impatti ambientali connessi alla produzione di prodotti
Plugging into the network: belowground connections between germlings and extraradical mycelium of arbuscular mycorrhizal fungi
No full textArbuscular mycorrhizal fungi (AMF) are obligate biotrophs; nevertheless their spores can germinate in the absence of host plants. Such inconsistent behavior is balanced by diverse survival strategies. The ability of AM fungal hyphae to fuse might represent a fundamental survival strategy because germlings could plug into compatible mycorrhizal networks, thus gaining access to plant-derived carbon before asymbiotic growth arrest. An in vivo experimental system was used to grow extraradical mycelium produced by Glomus mosseae colonizing three different plant species and germlings of the same isolate. After symbiotic and asymbiotic mycelia came into contact we showed that germling hyphae fused with symbiotic network hyphae and established protoplasm connections with nuclei occurring in fusion bridges. The frequency of anastomoses between germling and symbiotic hyphae was 4.9-23.9%. Prefusion and postfusion incompatible responses, with protoplasm withdrawal in interacting hyphae, were evident in some hyphal contacts. Given the multigenomic nature of AMF, the mingling of germling nuclei with those of the mycorrhizal network through perfect fusions might represent a means for the maintenance of genetic diversity in the absence of sexual recombination
In vitro growth response of Prunus Cerasifera shoots as influenced by different light-dark cycles and sucrose concentrations.
No full textTrials were carried out to test if the higher growth response shown by shoot clusters of Mr. S. 2/5, a clonal selection of Prunus cerasifera, submitted to short and frequent light-dark regimes could be related to the amount of sucrose added to growth medium. The reduction of sucrose from 30 gl-1 (control) to 22.5 gl-1, 15 gl-1 and 7.5 gl-1 caused a progressive and remarkable inhibition of shoot tip growth. With 15 gl-1 the value of some growth parameters was reduced by more than half. Under 16-h daylength, the best sucrose concentration was 30 gl-1, while with 4-h light-2-h dark no statistical differences appeared between 30 gl-1 and 22.5 gl-1 sucrose. Compared to 16-h light-8-h dark, the 4-h light-2-h dark cycle at the three highest sucrose concentrations gave rise to higher values of fresh and dry weight as well as increasing the number of axillary shoots produced. The increment in growth response induced by the shorter light-dark regime decreased with diminishing growth capacity in the cultures when sucrose concentration was lowered, but it was still appreciable even with 7.5 gl-1. Since the 4-h light-2-h dark cycle induced a favourable effect in culture growth with all sucrose concentrations, we conclude that the greater growth response observed with this light regime was not triggered by carbohydrate availability but by some other unknown factors
Effects of arbuscular mycorrhizal fungi on in vivo root initiation and development of micropropagated plum shoots
No full textThe influence of arbuscular mycorrhizal fungi on in vivo root initiation and development of Mr.S. 2/5 microcuttings was investigated. Micropropagated shoots of the Prunus cerasifera L. rootstock, clone Mr.S. 2/5, were placed in a sterile rooting mixture or inoculated with arbuscular mycorrhizal (AM) fungi. A part of the uninoculated microcuttings received auxin treatment (IBA 200 mg 1-1) or were supplied with a non-sterile sievate of mycorrhizal inoculum. Rooting percentage, root system morphology and growth increments of in vivo rooted microcuttings were evaluated. In vivo rooting of Mr.S. 2/5 shoots was obtained successfully but mycorrhizal inoculation did not show a positive influence on rooting ability of microcuttings. First harvest of plantlets was carried out very early, when mycorrhizal and non-mycorrhizal plants showed no significant growth differences. By this time, AM fungi had greatly increased the proportion of the root system present as higher-order laterals and branching intensity of roots. No significant alterations in root system morphology were observed in plants grown in amended soil and in plants receiving IBA treatment. Moreover, mycorrhizal inoculation appeared very important for rapid acclimatization and growth of in vivo rooted microcuttings. Thus mycorrhizal symbiosis induced early resumption of shoot apical growth during the acclimatization phase of Mr.S. 2/5 plantlets. At final harvest, growth attributes of mycorrhizal plants were therefore notably higher than in all the other treatments, and were estimated comparable to those of in vitro rooted plantlets obtained according to the standard procedure. These results show that mycorrhizal symbiosis induced significant alterations in root system morphology in in vivo rooted microcuttings of Mr.S. 2/5 rootstock and that acclimatization and growth of in vivo rooted microcuttings was positively affected by AM fungal inoculation
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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