The perspectiva ad usum praedicatorum in late 13th-century Florence: some observations based on an examination of codex Plut. 17 sin. 8 from the Laurentian Library

This contribution offers a description of codex Plut. 17 sin. 8 from the Laurentian Library, a manuscript that may have been in Florence (possibly in the library of Santa Croce) since the late 13th century and which contains numerous texts on the science of perspectiva and on physical and spiritual light. Particular attention is devoted to the works of John Peckham (De numeris misticis, Perspectiva communis, Tractatus de perspectiva, Quaestiones) and Bartolomeo da Bologna (De luce, Quaestiones) transmitted by the miscellany. These texts testify to the close connection between optics and theology, and to the interest in such disciplines shown by friar minors (as well as other clerics) in the mid-13th century. Following an in-depth analysis of each quire and of some marginal annotations, the paper discusses the editorial project that may lie at the basis of the miscellany, and its potential readers, ultimately presenting some hypotheses with regard to the role played by the Franciscan preacher Servasanto da Faenza in relation to this «publishing venture»

Symposium introduction - ethics and sustainable agri-food governance: appraisal and new directions

© Springer Nature B.V. 2019This Symposium contributes to a theoretical and methodological discussion on the role of ethics and responsibility in the governance of agri-food systems, as drivers for transitions towards sustainability. The papers in the Symposium are the outcomes of a collective reflection that was initiated at the European Society for Rural Sociology (ESRS) 2017 congress, within the Working Group on Ethics and sustainable agri-food governance. The session examined how ethics and ethical values drive change in the agri-food system, and how they increasingly evolve and influence food system governance. Building on the outcomes of the ESRS Working Group, the collection of papers in this Symposium fosters and deepens the discussion on the role of ethics in food systems, ranging across different food system actors, activities and contexts and presents new theoretical and methodological frameworks to understand the construction of more ethical agri-food systems.Peer reviewedFinal Accepted Versio

Sustainability of local and global food chains: Introduction to the special issue

Sustainability assessment is one of the keys to competition by food supply chains over sustainability. The way it is conceived and embodied into decision-makers' choices affects the competitiveness of local and global chains. Science-based assessment methodologies have made substantial progress, but uncertainties-as well as interests at stake-are high. There are no science-based methods that are able to give an unchallenged verdict over the sustainability performance of a firm, let alone a supply chain. Assessment methods are more suited for medium-large firm dimensions, as planning, monitoring, and reporting are costly. Moreover, the availability of data affects the choice of parameters to be measured, and many claims of local food are not easily measurable. To give local chains a chance to operate on a level playing field, there is the need to re-think sustainability assessment processes and tailor them to the characteristics of the analysed supply chains. We indicate seven key points on which we think scholars should focus their attention when dealing with food supply chain sustainability assessment

Two-stage re-estimation adaptive design: a simulation study

Background: adaptive clinical trial design has been proposed as a promising new approach to improve the drug discovery process. Among the many options available, adaptive sample size re-estimation is of great interest mainly because of its ability to avoid a large ‘up-front’ commitment of resources. In this simulation study, we investigate the statistical properties of two-stage sample size re-estimation designs in terms of type I error control, study power and sample size, in comparison with the fixed-sample study. Methods: we simulated a balanced two-arm trial aimed at comparing two means of normally distributed data, using the inverse normal method to combine the results of each stage, and considering scenarios jointly defined by the following factors: the sample size re-estimation method, the information fraction, the type of group sequential boundaries and the use of futility stopping. Calculations were performed using the statistical software SAS™ (version 9.2). Results: under the null hypothesis, any type of adaptive design considered maintained the prefixed type I error rate, but futility stopping was required to avoid the unwanted increase in sample size. When deviating from the null hypothesis, the gain in power usually achieved with the adaptive design and its performance in terms of sample size were influenced by the specific design options considered. Conclusions: we show that adaptive designs incorporating futility stopping, a sufficiently high information fraction (50-70%) and the conditional power method for sample size re-estimation have good statistical properties, which include a gain in power when trial results are less favourable than anticipated.&nbsp

Two-stage re-estimation adaptive design: a simulation study

  Background: adaptive clinical trial design has been proposed as a promising new approach to improve the drug discovery process. Among the many options available, adaptive sample size re-estimation is of great interest mainly because of its ability to avoid a large ‘up-front’ commitment of resources. In this simulation study, we investigate the statistical properties of two-stage sample size re-estimation designs in terms of type I error control, study power and sample size, in comparison with the fixed-sample study. Methods: we simulated a balanced two-arm trial aimed at comparing two means of normally distributed data, using the inverse normal method to combine the results of each stage, and considering scenarios jointly defined by the following factors: the sample size re-estimation method, the information fraction, the type of group sequential boundaries and the use of futility stopping. Calculations were performed using the statistical software SAS™ (version 9.2). Results: under the null hypothesis, any type of adaptive design considered maintained the prefixed type I error rate, but futility stopping was required to avoid the unwanted increase in sample size. When deviating from the null hypothesis, the gain in power usually achieved with the adaptive design and its performance in terms of sample size were influenced by the specific design options considered. Conclusions: we show that adaptive designs incorporating futility stopping, a sufficiently high information fraction (50-70%) and the conditional power method for sample size re-estimation have good statistical properties, which include a gain in power when trial results are less favourable than anticipated.&nbsp

Pink spots on Porites: not always a coral disease

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Consent to Targeted Advertising

Targeted advertising in digital markets involves multiple actors collecting, exchanging, and processing personal data for the purpose of capturing users’ attention in online environments. This ecosystem has given rise to considerable adverse effects on individuals and society, resulting from mass surveillance, the manipulation of choices and opinions, and the spread of addictive or fake messages. Against this background, this article critically discusses the regulation of consent in online targeted advertising. To this end, we review EU laws and proposals and consider the extent to which a requirement of informed consent may provide effective consumer protection. On the basis of such an analysis, we make suggestions for possible avenues that may be pursued

Framework for LL facilitation and data production

The Deliverable 5.1 “Framework for LL facilitation and data production” is intended for all Living Labs and all DIVINFOOD project partners. This document provides a framework to situate LLs’ definition and contribution to the overall aim of the DIVINFOOD project. It orients LL coordinators throughout the setting up and development of living lab interactions, experiments and data collection. It also suggests tools to support LL facilitation and interactions at local level

Food waste reduction and food poverty alleviation: a system dynamics conceptual model

The contradictions between food poverty affecting a large section of the global population and the everyday wastage of food, particularly in high income countries, have raised significant academic and public attention. All actors in the food chain have a role to play in food waste prevention and reduction, including farmers, food manufacturers and processors, caterers and retailers and ultimately consumers. Food surplus redistribution is considered by many as a partial solution to food waste reduction and food poverty mitigation, while others criticize charitable initiatives as inadequate responses, that inhibit governments from responsibly protecting the citizens right to food. This paper frames food assistance as “hybrid systems”, situating at the intersection of territorial food, public welfare and third sector voluntary systems. Based on available literature and reflections on previous research examining food banks in Italy, we develop a system dynamics conceptual mapping. The aim is to model a set of relations and dynamic mechanisms associated with variables relevant to food waste generation, food recovery for social purposes and food poverty alleviation. The analysis of feedback interactions highlights the (actual and potential) vulnerabilities of food assistance systems that occur when addressing food poverty by reducing food surplus. In summary, as the awareness on food poverty and food surplus arises, incentives to food recovery and redistribution strengthen the role of (voluntary) food assistance actors, increasing their exposure to drivers of change, such as retailers’ standards for food surplus prevention. This paper contributes to the current academic debate on charitable food assistance, with insights for policy makers and other systems’ actors

Coordination Mechanisms along the Supply Chain: a Key-Factor for Competitiveness

The purpose of this paper is to contribute to a better understanding of the role of relationships between stakeholders in the supply chain as a potential source of competitive advantage. In the case study, we focus on the wine industry in the Lazio Region (Italy). We observe a significant loss of competitiveness in this industry and we suggest that a higher level of communication and different coordination mechanisms among stakeholders could help in recovering a better market position. We focus on the linkages between farmers and the other food chain stakeholders through the perspective of Institutional Economics and Economics of Organization, in order to identify the key factors that determine the competitiveness of the supply chain’s product. The Lazio wine supply chain is investigated through the analysis of official data, integrated with primary data, collected through in-person interviews and questionnaires addressed to producers and experts. It emerges that the wine supply chain in the Lazio Region is characterized by a serious decline, suggested by a sharp decrease in production and sales, low reputation among experts, widespread negative consumers perception. We interpret this turn-down through the structural features of the market and through the low level of communication and coordination between the agents. This leads to the identification of potential instruments able to deal with the difficulties highlighted. We emphasize the role of public institutions in fostering communication and cooperation among firms and suggest the potential role of a web portal, in linking sellers and buyers in a common network