scholarly journals Assessing Reclaimed Urban Wastewater for Reuse in Agriculture: Technical and Economic Concerns for Mediterranean Regions

Water ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1511 ◽  
Author(s):  
Giacomo Giannoccaro ◽  
Stefania Arborea ◽  
Bernardo C. de Gennaro ◽  
Vito Iacobellis ◽  
A. Ferruccio Piccinni

Direct reuse of treated wastewater can offer a realistic supply alternative for irrigation in Mediterranean areas. In this study, we conducted a spatial cost-benefit analysis to quantify and locate the volume of technically and economically feasible and readily available reclaimed urban wastewater. We considered the case of Puglia (Italy) and the results are discussed in terms of the implications for policy-making and pointing out future research needs. The results showed that the main technical barrier is the shortness of the irrigation season. On the other hand, the main economic concern is related to filtration followed by lack of conveyance systems. While our results are based on estimates, future research should try to include practical experiments based on actual data. Further research should also address the issue of transaction costs by establishing the obligations of wastewater treatment plants to deliver reclaimed water to farmers.

2012 ◽  
Vol 44 (2) ◽  
pp. 234-247 ◽  
Author(s):  
A. Díez-Herrero ◽  
J. A. Ballesteros-Cánovas ◽  
J. M. Bodoque ◽  
V. Ruiz-Villanueva

Dendrogeomorphology uses information sources recorded in the roots, trunks and branches of trees and bushes located in the fluvial system to complement (or sometimes even replace) systematic and palaeohydrological records of past floods. The application of dendrogeomorphic data sources and methods to palaeoflood analysis over nearly 40 years has allowed improvements to be made in frequency and magnitude estimations of past floods. Nevertheless, research carried out so far has shown that the dendrogeomorphic indicators traditionally used (mainly scar evidence), and their use to infer frequency and magnitude, have been restricted to a small, limited set of applications. New possibilities with enormous potential remain unexplored. New insights in future research of palaeoflood frequency and magnitude using dendrogeomorphic data sources should: (1) test the application of isotopic indicators (16O/18O ratio) to discover the meteorological origin of past floods; (2) use different dendrogeomorphic indicators to estimate peak flows with 2D (and 3D) hydraulic models and study how they relate to other palaeostage indicators; (3) investigate improved calibration of 2D hydraulic model parameters (roughness); and (4) apply statistics-based cost–benefit analysis to select optimal mitigation measures. This paper presents an overview of these innovative methodologies, with a focus on their capabilities and limitations in the reconstruction of recent floods and palaeofloods.


Author(s):  
Marcell Székely ◽  
John Michael

Abstract In the current paper, we articulate a theory to explain the phenomenology of mental effort. The theory provides a working definition of mental effort, explains in what sense mental effort is a limited resource, and specifies the factors that determine whether or not mental effort is experienced as aversive. The core of our theory is the conjecture that the sense of effort is the output of a cost-benefit analysis. This cost-benefit analysis employs heuristics to weigh the current and anticipated costs of mental effort for a particular activity against the anticipated benefits. This provides a basis for spelling out testable predictions to structure future research on the phenomenology of mental effort.


2020 ◽  
Vol 8 (1) ◽  
pp. 50-60 ◽  
Author(s):  
Gilles Pittoors

This article aims to contribute both theoretically and empirically to the study of political parties in the EU context, focusing on party organisation. Theoretically, it draws on insights from various literatures to develop a novel typology of multilevel party organisation specific to the EU context. It argues that parties are goal-seeking actors that choose their organisation based on a cost-benefit analysis, involving both party characteristics and the institutional context. Empirically, the article applies this framework on the Flemish political parties. It finds that rational goal-seeking behaviour cannot fully account for parties’ organisational choices. Results show that normative and historical considerations play a crucial role in parties’ cost-benefit analysis. It therefore calls upon future research to expand the number of comparative studies and to further assess parties’ goal-seeking behaviour regarding their multilevel organisation.


Author(s):  
Tsai-Fa (TF) Yen

As the market size of the video industry continues to grow by 3.6 times increased in the past five years, more and more companies adopt video marketing. Under this circumstance, it is meaningful and important to discuss the marketing issues in this industry. The objective of this study is to clarify the definition, problems and countermeasures of video marketing. Literature was obtained through data retrieval, and the data was aggregated and analyzed by induction. Findings show that the problems of video marketing cover the laws, suppliers, buyers, competitors, and content technical issues. And we suggest that the future research can try to verify the key points of STP analysis (segmentation, targeting, and positioning), marketing mix, as well as the cost-benefit analysis in video marketing.


2014 ◽  
Vol 48 (21) ◽  
pp. 12500-12508 ◽  
Author(s):  
Ivana Logar ◽  
Roy Brouwer ◽  
Max Maurer ◽  
Christoph Ort

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yeri Tordecilla Avila ◽  
Jana Schmutzler ◽  
Patricia Beatriz Marquez Rodriguez ◽  
Eduardo Gómez Araujo

PurposeThis paper aims to evaluate whether entrepreneurs with an innovative product/service are more likely to formally register their businesses. Understanding the decision of business registration as a rational choice of the entrepreneurs, where she weighs the costs versus the benefits of such formalization, the study expands the literature on informal entrepreneurship by looking at the benefit-side rather than the typically evaluated cost-side of an individual cost-benefit evaluation.Design/methodology/approachThe authors relied on the Global Entrepreneurship Monitor (GEM) adult population survey to evaluate the hypothesis. Specifically, the authors used the GEM data of 2016 for Colombia, covering 2,069 observations (a representative sample at the country level), evaluating the relationship between innovativeness and business registration for the early stage of the entrepreneurial process. Given the nature of our dependent variable, the authors estimated a logistic regression model.FindingsDifferent from what the authors hypothesized, they did not find empirical evidence for a positive correlation between an innovative product or service and business registration. Instead, businesses that compete with many others offering the same product/service have a higher tendency to register at the Chamber of Commerce. Contrarily of what might be suspected, opportunity-based entrepreneurship – as opposed to necessity-based – is not a relevant variable when formalizing a business, providing evidence for our hypothesis that necessity-based entrepreneurship cannot be equalized with informal entrepreneurship. Additionally, the authors show that an entrepreneur with higher socioeconomic status is more likely to register his company.Research limitations/implicationsThe results provide first exploratory evidence that the benefit evaluation may play a role in formalizing a start-up, thus calling for future research that not only tackles the influence of registration costs and administrative burden but rather looks at the outcome of a cost-benefit analysis. The data imply several limitations which future research should address: variables measuring the innovativeness of the product/service are rather coarse measures and need to be expanded and detailed in future research. Additionally, the authors acknowledge that a relatively high number of missing values may generate a selection bias in our population sample. Finally, because of situating the research in a developing country, the research results may lack generalizability. Therefore, researchers are encouraged to test the proposed propositions further.Practical implicationsIn a country like Colombia with very high levels of informality, it is necessary that the government fully understands the role of innovation in the formalization process of start-ups. The results indicate that a differentiation of support mechanisms to increase the formalization of businesses according to the different stages of their development may be necessary and that aside from costs, benefits of formalization play a role. A higher level of formality is not only related to economic growth but also much better protection of workers, therefore going beyond the reduction of registration costs and the implied administrative burden should be an additional public policy target for decreasing informality. Finally, the correlation of socioeconomic stratum with the decision to register hints at a varying evaluation of formalization, a point that merits attention by government and academia.Originality/valueThe study shifts the focus from the evaluation of solely costs for business registering as a barrier to start-up formalization to the cost-benefit analysis. The authors propose – and show – that such an evaluation is not generalizable for all kinds of business. Specifically, the authors show that a start-up is more likely to register when it competes with a large number of competitors than when it competes with a smaller number of others offering the same. At the same time, the authors also show that the stage at which the start-up company is at influences the decision to formalize.


2021 ◽  
Author(s):  
Donald Derrick ◽  
Natalia Kabaliuk ◽  
Luke Longworth ◽  
Peiman Pishyar-Dekhordi ◽  
Mark Jermy

Abstract Face masks slow exhaled air flow and sequester exhaled particles. There are many types of face masks on the market today, each having widely varying fits, filtering, and air redirection characteristics. While particle filtration and flow resistance from masks has been well studied, their effects on speech air flow has not. We built a schlieren system and recorded speech air flow with 14 different face masks, comparing it to mask-less speech. All of the face masks reduced air flow from speech, but some allowed air flow features to reach further than 40 cm from a speaker’s lips and nose within a few seconds, and all the face masks allowed some air to escape above the nose. Evidence from available literature shows that distancing and ventilation in higher-risk indoor environment provide more benefit than wearing a face mask. Our own research shows all the masks we tested provide some additional benefit of restricting air flow from a speaker. However, well-fitted mask specifically designed for the purpose of preventing the spread of disease reduce air flow the most. Future research will study the effects of face masks on speech communication in order to facilitate cost/benefit analysis of mask usage in various environments.


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