Economic Feasibility of Agrivoltaic Systems in Food-Energy Nexus Context: Modelling and a Case Study in Niger

In the literature, many studies outline the advantages of agrivoltaic (APV) systems from different viewpoints: optimized land use, productivity gain in both the energy and water sector, economic benefits, etc. A holistic analysis of an APV system is needed to understand its full advantages. For this purpose, a case study farm size of 0.15 ha has been chosen as a reference farm at a village in Niger, West Africa. Altogether four farming cases are considered. They are traditional rain-fed, irrigated with diesel-powered pumps, irrigated with solar pumps, and the APV system. The APV system is further analyzed under two scenarios: benefits to investors and combined benefits to investors and farmers. An economic feasibility analysis model is developed. Different economic indicators are used to present the results: gross margin, farm profit, benefit-cost ratio, and net present value (NPV). All the economic indicators obtained for the solar-powered irrigation system were positive, whereas all those for the diesel-powered system were negative. Additionally, the diesel system will emit annually about 4005 kg CO2 to irrigate the chosen reference farm. The land equivalent ratio (LER) was obtained at 1.33 and 1.13 for two cases of shading-induced yield loss excluded and included, respectively.

The pragmatism of drawing context networks

Linguistics has embraced the functional and contextual turn but, when building tools for systematic contextual description, we have not made as much use as we could of our own functional traditions. Rather, we have largely relied on the metaphors of law and rule, which do not adequately capture tensions between consistency and variability in how language and context relate to each other. Our aim in this paper is to show the economy and practicality of representing context as a pathway through a network, drawing on the network technique for mapping systems of grammatical choice introduced by Michael Halliday, and on its application to other linguistic strata first offered by Ruqaiya Hasan. The paper begins by outlining why alternative frameworks are needed for describing context-language relations. We then present a contextual network for one specific domain of the Systemic Functional Linguistic notion of Tenor, namely social distance, and use this to explore how different configurations of features of social distance influence the way that traditions of practice are passed on as a specialised legacy in two different professional collaborations. While the kind of context modelling discussed here is in a very early phase of development compared to phonetic, morphological and grammatical description, it has many advantages: contextual networks are paradigmatic in orientation; they help display and theorise metastability in language; they are “ad hoc” in Firth’s positive sense; and they constitute a proposal to be tested against observed behaviour within specific cultural and situational settings.

Enabling situational awareness of business processes

PurposeThe purpose of this research is to explore the ways of integrating situational awareness into business process management for the purpose of realising hyper automated business processes. Such business processes will help improve their customer experiences, enhance the reliability of service delivery and lower the operational cost for a more competitive and sustainable business.Design/methodology/approachOntology has been deployed to establish the context modelling method, and the event handling mechanisms are developed on the basis of event calculus. An approach on performance of the proposed approach has been evaluation by checking the cost savings from the simulation of a large number of business processes.FindingsIn this research, the authors have formalised the context presentation for a business process with a focus on rules and entities to support context perception; proposed a system architecture to illustrate the structure and constitution of a supporting system for intelligent and situation aware business process management; developed real-time event elicitation and interpretation mechanisms to operationalise the perception of contextual dynamics and real-time responses; and evaluated the applicability of the proposed approaches and the performance improvement to business processes.Originality/valueThis paper presents a framework covering process context modelling, system architecture and real-time event handling mechanisms to support situational awareness of business processes. The reported research is based on our previous work on radio frequency identification-enabled applications and context-aware business process management with substantial extension to process context modelling and process simulation.

The Economics of Bernard Lonergan: Context, Modelling and Assessment

Bernard Lonergan S.J. (1904-84) is unusual among major theologians in engaging deeply with economic theory. In the 1940s he developed his own dynamic multisectoral macroeconomic model, informed by reading of Smith, Marx, Keynes, Hayek, Schumpeter, and later Kalecki. Lonergan’s economic research is little known because the economic manuscripts were not published in his lifetime, and his interactions with professional economists were limited. In the 1970s, however, when he returned to economics he engaged with Post-Keynesians and taught a graduate course on macroeconomics at Boston College until illness overtook him. This paper places Lonergan’s economic research in the context of his overall intellectual project, outlines his macroeconomic model and associated theory of the business cycle, then evaluates his contribution in relation to mid-twentieth century macroeconomics and considers whether it has anything to offer contemporary economists. Whatever view we take of his theoretical contributions, Lonergan’s work opens up connections between economics and theology.