1,721,139 research outputs found
Assessing diets, food supply chains and food systems sustainability: towards a common understanding of economic sustainability
No full textOne of the main challenges impeding the promotion of sustainable food systems and diets is that
related to sustainability assessment. Therefore, it is crucial to develop a shared scientifically-sound
and easily applicable methodology for the analysis of sustainability. Economy is widely recognised
as one of the three pillars of sustainability. The paper lists the main nutrition, health, environment,
society, ethics and economy issues that should be considered for defining the economic sustainability
of diets and provides insights for the assessment of the economic sustainability of healthy diets
with a particular focus on the modelling of the economic effects of a switch to recommended diets
and the analysis of the economic sustainability of food supply chains using different models and
methods (e.g. input–output models, scenario analysis). The paper also highlights the importance
of analysing the economic sustainability in relation to public policies especially those related to
agriculture, food/nutrition and health. As a concrete case study, the paper provides a tentative list
of indicators for assessing the economic sustainability of the food system in Apulia region (southeastern
Italy). For economic sustainability analysis many indicators can be used to describe current
resource allocations and the impact of changes in food demand such as land use, production,
prices, value of output, employment and trade. Economic objectives for sustainable food chains
may include ensuring moderate food prices, achieving an equality point between food supply and
demand, maintaining job posts, and optimising added value and return on investment. Economic
modelling can be used to predict what might happen in case of a shift towards more healthy diets
under different scenarios. The paper points out that the sustainability assessment focus (diet, food
supply chain, food system) and geographical coverage should be clearly defined for the selection of
appropriate economic indicators
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
THE HISTORICAL FAGNANO'S PROBLEM: TEACHING MATERIALS AS ARTIFACTS TO EXPERIMENT MATHEMATICAL AND PHYSICAL TASKS IN ITALIAN HIGH SCHOOL
No full textThe starting point of this research is Fagnano’s problem: “For a given acute triangle, determine the inscribed triangle of the minimal perimeter.” This problem has been investigated using methodologies both from mathematical analysis and synthetic geometry, and many demonstrative strategies have been provided. The orthic triangle is the problem's solution. This problem has been recently extended to convex quadrilaterals. In particular, Fagnano's problem is relevant in billiard physics: the orthic triangle is the minimum periodic orbit of an acute triangular billiard. An open question still remains referring to quadrilaterals: "Are the Orthic Quadrilaterals the minimum periodic orbits in a real billiard?" This communication aims to describe experimental
teaching in an Italian high school, focused on Mathematical and Physical tasks, from a historical perspective. Starting from a historical and epistemological context, an interdisciplinary learning path has been planned, which has been experimented with about sixty fifteen-year-old students. The applicability of some geometric theorems to different contexts of reality has been tested through the realization and use of specific artifacts as teaching materials
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
La logica matematica e la logica narrativa si intrecciano in un percorso interdisciplinare per gli studenti della scuola secondaria
No full textNegli ultimi anni, l'esigenza di proporre percorsi didattici innovativi in ambito scientifico ha condotto a una riflessione profonda sull'integrazione tra contenuti disciplinari e metodi didattici trasversali. In tale direzione si colloca il progetto Liceo Matematico (Capone et al., 2017), che promuove un'educazione matematica fondata sull'interdisciplinarità (Capone & Faggiano, 2024) e sull'utilizzo del laboratorio per favorire un apprendimento significativo. Questo lavoro descrive un'attività centrata sulla logica proposizionale, strutturata attorno alla narrazione delle avventure di Peter Mat sull'isola del FaRo. L'obiettivo è, da un lato, introdurre e approfondire i concetti fondamentali della logica classica, dall'altro, promuovere l'acquisizione delle competenze STEM, in particolare attraverso l'attivazione delle competenze critiche, comunicative, collaborative e creative (4C)..
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