1,721,000 research outputs found
L’età delle riforme incompiute
No full textil Capitolo offre una interpretazioen generale della dinamiche delle politiche pubbliche italiane negli ultimi 25 ann
Le Politiche Pubbliche in Italia
No full textIl libro offre gli strumenti più aggiornati per uno studio efficace delle politiche pubbliche nel nostro paese. Nella loro analisi empiricamente fondata, e sulla base di specifici riferimenti teorico-interpretativi, gli autori - tutti qualificati esperti della materia - illustrano le caratteristiche e la portata del policy change (in termini di cambiamenti dei processi e della performance) avvenuto nei 25 anni della cosiddetta «seconda repubblica»
Ethylene: Management and breeding for postharvest quality in vegetable crops. A review
Full text linkEthylene is a two-carbon gaseous plant growth regulator that involved in several important physiological events, including growth, development, ripening and senescence of fruits, vegetables, and ornamental crops. The hormone accelerates ripening of ethylene sensitive fruits, leafy greens and vegetables at micromolar concentrations, and its accumulation can led to fruit decay and waste during the postharvest stage. Several strategies of crops management and techniques of plant breeding have been attempted in the last decades to understand ethylene regulation pathways and ethylene-dependent biochemical and physiological processes, with the final aim to extend the produce shelf-life and improve the postharvest quality of fruits and vegetables. These investigation approaches involve the use of conventional and new breeding techniques, including precise genome-editing. This review paper aims to provide a relevant overview on the state of the art related to the use of modern breeding techniques focused on ethylene and ethylene-related metabolism, as well as on the possible postharvest technological applications for the postharvest management of ethylene-sensitive crops. An updated view and perspective on the implications of new breeding and management strategies to maintain the quality and the marketability of different crops during postharvest are given, with particular focus on: postharvest physiology (ethylene dependent) for mature and immature fruits and vegetables; postharvest quality management of vegetables: fresh and fresh cut products, focusing on the most important ethylene-dependent biochemical pathways; evolution of breeding technologies for facing old and new challenges in postharvest quality of vegetable crops: from conventional breeding and marker assisted selection to new breeding technologies focusing on transgenesis and gene editing. Examples of applied breeding techniques for model plants (tomato, zucchini and brocccoli) are given to elucidate ethylene metabolism, as well as beneficial and detrimental ethylene effects
Le politiche scolastiche: sempre incompiute tra riforme radicali e riforme incrementali
No full textRicostruzione delle riforme della scuola negli ultimi 25 anni operata sulla base delle teorie del Policy Desig
Le politiche amministrative: continuità e discontinuità nei processi di riforma
No full textL’obiettivo del contributo è quello di fornire un'analisi sintetica delle riforme amministrative negli ultimi trent'anni, ripercorrendo in senso diacronico le principali stagioni di modernizzazione degli apparati pubblici, fornendo poi una lettura secondo i concetti di policy analysis. A partire dagli interventi introdotti nel periodo 1992-1993, sono passati in rassegna i principali progetti dei diversi governi fino al 2019. L’analisi è suddivisa in due periodi, che corrispondono, a parere di chi scrive, ad una discontinuità nelle caratteristiche dei disegni di riforma: da un lato troviamo progetti basati su un pacchetto di interventi incentrati su un’idea-guida, con un orientamento alla ricerca di coerenza tra obiettivi e tra strumenti; dall’altro, disegni con un orientamento incrementale che progressivamente perde di vista la strategia di fondo in grado di indirizzare l’attuazione. Sono poi presi in considerazione i principali attori coinvolti e gli stili di policy che hanno caratterizzato i diversi periodi, così come i giudizi formulati dalla principale letteratura di public policy
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
Changes in the pyruvic acid content correlates with phenotype traits in onion clones
Full text linkConsumer demand is oriented toward onion cultivars with lower pungency, and the pyruvic acid content of onions is highly correlated with their pungency. Therefore, breeding programmes might be based on the pyruvic acid content of the parental bulbs. The present study was performed using 97 onion clones with the aim of correlating the pyruvic acid levels with phenotype traits in the different genotypes used in breeding programmes. The onion bulbs were provided from the breeding company with blind labels, and four bulbs were individually analysed for each clone. A comparison between the spectrophotometric and HPLC determination of pyruvic acid was also carried out and showed an excellent linear regression with an R 2 = 0.951. The pyruvic acid was studied in correlation with tunic colours, pungency and precocity, and the highest correlation coefficient was found for red skinned onions. The lowest pyruvate content was found in white onions, with 6.5 μmol g -1 FW, whereas higher values (8.4-8.5 μmol g -1 FW) were observed in yellow and red onions. The chemical analyses were compared with panel taste assessments. The results confirmed that the pungency and pyruvic acid content were positively and significantly correlated (P<0.0001),even when the coefficient resulted in a relatively low value (r = 0.515). The precocity trait was associated with pyruvate content: precocious onions, in particular, showed lower pungency
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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