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LCA: A Tool to Develop Sustainable Microalgal Biorefineries
Published in Shashi Kant Bhatia, Sanjeet Mehariya, Obulisamy Parthiba Karthikeyan, Algal Biorefineries and the Circular Bioeconomy, 2022
N.S. Caetano, P.S. Corrêa, W.G. de Morais Júnior, T.M. Mata, A.A.A. Martins, M. Branco-Vieira
This state of affairs is changing. An example, directly related with microalgae, concerns the carbon emission costs. The existing and further development of the carbon emissions market and carbon capture and utilization, and the advent of carbon taxes will represent operational costs that companies, in particular industrial, will need to minimize. Hence, these costs will have to be explicitly accounted for, when performing an LCC study of a microalgae production, as the carbon captured may reduce the carbon costs and improve a process profitability (Rajesh Banu et al., 2020; Sawaengsak et al., 2014; Valdovinos-García et al., 2020; Živković et al., 2017).
Interaction design process
Published in Konrad Baumann, Bruce Thomas, User Interface Design for Electronic Appliances, 2001
structure of the corresponding state of affairs in the world, as we perceive or conceive it’(Johnson-Laird 1980, 1983). Rouse and Morris (1986) also made a similar observation: 'If a perfect mental model can be assumed, one need only perform an engineering analysis of the system of interest to identify the model. In a sense, there is only one choice.'
Improving a rotating steel milling tool cooling by an air jet impingement flow
Published in Numerical Heat Transfer, Part A: Applications, 2023
Zineb Hemmami, Azzeddine Hammami
This work of simulation of heat transfer by forced convection produced by a cold air jet impacting a milling tool was motivated by the fact that experimental and numerical work were relatively rare in this field while applications using this technology were obviously very well received, this state of affairs gave us a fertile space to learn the tools of a powerful computational code as well as the exploration of the different models of turbulence suitable for precise study such as those of free jets and impacting jets. In this article, we studied heat transfer by jet impacting a milling tool. For the three geometric configurations a circular domain was used; the first case with a single inlet characterizing the cold air jet outlet nozzle with a cylindrical impact surface to validate the k – ε turbulence model, the second case consists in cooling the milling cutter with only one outlet of the cold air jet and finally the case of two nozzles to cool the milling tool; the cylinder and the milling cutter are in rotation with a speed of ω = 450 rad/s, our boundary conditions are the entry of cold air at a temperature of 273 K for Reynolds numbers relative to the entry of air varying between 12,000 and 26,000.
A review on the application of particle finite element methods (PFEM) to cases of landslides
Published in International Journal of Geotechnical Engineering, 2022
Fhatuwani Sengani, François Mulenga
In conclusion, several studies on PFEM have primarily focused on fluid mechanics rather than solid mechanics. This has made it difficult to find appropriate in-depth applications of the method in rock mechanics. The state of affairs can be attributed to the fact that PFEM is a novel technique still in its infancy in the field of solid mechanics. This study still sees a need to extend the application of PFEM to deal with large class of problems of solid mechanics through exploring its ability using different approaches. Notwithstanding the above case studies, Zhang (2014) pointed out that the mechanism and re-occurrence of slope sliding are yet to be determined. The above study finally seems to suggest the need for the development of PFEM model able to predict the mechanism behind rockfalls and slope sliding. Furthermore, a crucial contribution made by Monforte et al. (2017) indicated that since the ‘G-PFEM has been built in the general purpose FE Kratos environment’, then ‘an extension of its current capabilities to other scenarios (dynamic, fluid-soil interaction, thermal) would seem relatively straightforward’.
Death and disappearance at border crossings: factualization devices and truth(s) accounts
Published in Tapuya: Latin American Science, Technology and Society, 2022
Paola Díaz Lize, Anna Rahel Fischer
We understand the now classic Foucauldian notion of device not only as a “dominant strategic function,” i.e. power as domination, but above all as “a stipulated series of sequences intended to qualify or transform a state of affairs through an arrangement of material and language elements” (Dodier and Barbot 2021, 60). The three factualization devices examined here transform a state of affairs, i.e. the experience of death and disappearance by survivors, their families and witnesses, into facts and truth accounts through different practices of factualization. It is important to note that we do not consider the effect of matter, object and non-human, in isolation from the human and valuation practices and situations that give it meaning.