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The British Journal of …, 2006
Academia Engineering, 2024
Abstract: Critical minerals (CMs: mostly metals and a few non-metals) have a global demand due to their important/strategic applications in many high-tech industries such as the green-renewable energy (for decarbonisation to minimise the disastrous effects of climate change), electricals and electronics, telecommunications, superalloys, nuclear, space, artificial intelligence, defence etc. The list of CMs is dynamic and depends upon the availability and perspective of each country, based upon the issues like geological scarcity, geopolitical considerations, trade policy, problems in supply-chain and other factors. CMs can be broadly grouped into: (i) REEs; (ii) Battery Metals (Li, Co, Ni, Mn, Graphite); (iii) Alloy Metals (Ti, V, Cr, Ni, Nb-Ta, Sn); (iv) Nuclear Metals (U, Th, Zr-Hf, Be); (v) Precious Metals (Au, Ag, PGMs); (vi) Toxic Metals (Pb, As) and (vii) Fertiliser Commodities (Phosphate, Potash). Geologically, they are recoverable from diverse materials of rocks, ore minerals, mineral concentrate, sands, etc., with their sources being either primary or secondary. The primary sources for CMs were deposited during period(s) of mineralisation in a wide variety of rock types. When such primary sources of rocks and ore deposits (constitute a provenance) were subjected to alteration, due to weathering or other surficial processes resulting from descending surface waters, gave rise to the secondary sources of CMs like the supergene deposits of laterite, overburden, conglomerate and placers of different types. A brief note on the recovery and extraction of CMs is presented. Indian examples of the primary and secondary geological sources for the CMs, and their recovery and extraction are added. Keywords: Critical minerals, geo-sources, recovery, processing, Indian examples.
2012
This definition (as well as Gerdts's (1998) very similar definition) is fully in line with Wilhelm von Humboldt's original use of the term “einverleibend” (= incorporating) for examples such as Classical Aztec ni-naka-kwa [1SG-meat-eat] 'I eat meat', where -naka- 'meat' seems to be part of the complex verbal word ninakakwa, at least according to the spelling. But how exactly do we know that ni-naka-kwa is a single word, apart from the spelling? Couldn't we write it ni naka kwa and regard it as a syntactic phrase?
2018
People with disabilities are generally considered as incapacitated in the workforce, so they often experience exclusion to participate in employment opportunities. Yet work is a crucial issue in the lives of people with disability to survive, construct self-identity, and gain social recognition. However, to obtain the employment, people with disabilities experience various barriers, such as discrimination in the workplace, stigma, prejudice, and community stereotypes. This paper discusses how to create a labour market for people with disabilities, whether exclusion or inclusion. In line with the aims of the study, literature studies are used to reviews published research findings about labour market for people with disabilities. The results show that the current quota system for employing people disability in the formal sector is insufficient to realize an inclusive labour market. Therefore, the appropriate labour market for people with disabilities is the inclusion that meets the f...
Law and Humanities , 2019
Thanos Zartaloudis (2019) “Hieros anthropos – an inquiry into the practices of archaic Greek supplication”, Law and Humanities, DOI: 10.1080/17521483.2019.1605962 To link to this article: https://doi.org/10.1080/17521483.2019.1605962
GDR CNRS IASIS, 2024
Since the work of Claude Shannon, Entropy has been introduced axiomatically. The recent extension of information geometry to Lie groups via symplectic models of statistical mechanics, initiated by Jean-Marie Souriau (Lie groups thermodynamics), makes it possible to give a purely geometric "constructive" definition of the 'Entropy. Starting from the symmetry group which acts on the data or the system, the Entropy is constructed as an invariant Casimir function on the symplectic foliation generated by the co-adjoint orbits of the group (co-adjoint orbits constructed by the action of the group on the moment application, where the moment application is a geometrization of Noether's theorem). The level sets of Entropy thus appear as the leaves of this symplectic foliation generated by the co-adjoint action. In the case of the symmetry group of Euclidean space, we find the classical Shannon Entropy, which is therefore a special case of this model. We therefore move from Shannon's axiomatic definition to a geometric “constructive” definition of Entropy. It is symmetry which generates Entropy via the moment application. In the theory of representations of Lie groups introduced by Alexandre Kirillov, we associate a symplectic manifold with these co-adjoint orbits via a 2 KKS form (Kirillov-Kostant-Souriau) and an associated Riemannian metric. As part of the extension of Information geometry to Lie groups, this metric appears exactly like the Fisher-Koszul metric. Thanks to the Lie algebra cohomology and the Souriau cocycle, we can deal with cases where the co-adjoint operator is not equivariant. This model makes it possible to extend the notion of Gaussian probability density for an informational measurement on Lie groups or for homogeneous spaces on which a Lie group acts, by considering the Gibbs density of Maximum Entropy, which has for the previous model has the property of being covariant under the action of the group. We will illustrate this fact by giving the definition of a Gaussian with maximum entropy for the half-plane and the Poincaré disk via the group SL(2,R) and SU(1,1), and for the covariance matrices symmetric positive definite SPD via the group SL(n,R) and SU(n,n) (the SDP matrices being considered as the pure imaginary axis of the Siegel half-space). This symplectic foliation structure, level curves of Entropy, also makes it possible to interpret the 2nd principle of thermodynamics by studying its transverse structures. Initiated by Charles Ehresmann and Georges Reeb, the theory of foliations makes it possible to give the geometry of information a “fabric” structure, made up of a symplectic foliation (describing non-dissipative dynamics) and a structure in transverse Riemannian foliation (describing the dissipative dynamics with creation of entropy). The metric which appears on the transverse Riemannian foliation is the dual metric of the Fisher metric, that is to say the Hessian of Entropy. We thus have 2 transverse foliations associated with the 2 dual metrics of information geometry. The dynamics on these 2 transverse foliations is given by the equation of the “metriplectic” flow with a Poisson hook to move on the symplectic leaves(non-dissipative flow because we move on the Entropy level curve; l entropy being a function of Casimir) and a metric hook to move on the transverse Riemannian leaves (production of Entropy at constant Energy; Energy is a function of Casimir for the metric hook on these sheets which are therefore the level curves of Energy). Recently, it was shown that the metriplectic flow was compatible with Onsager relations in non-equilibrium thermodynamics. The metriplectic flow is used in machine learning for TINN (Thermodynamics-Informed Neural Network) and to stabilize the CAT and GKP bosonic Qubits of quantum computers in superconductor technology (the Linblad equation is a linear approximation of the metriplectic equation). We will conclude with an extension to quantum mechanics of these models. Indeed, the symplectic geometry of statistical mechanics was constructed by Jean-Marie Souriau to address quantum mechanics. A geometric reinterpretation of the states of statistical mechanics makes it possible to introduce the axiomatics of quantum states and solutions of a simple set of inequalities. This axiomatic provides a probabilistic interpretation, relating the Hilbert space and the unitary representation of a group called quantum representation. This model is studied within the framework of 2 European actions, COST CaLISTA (https://site.unibo.it/calista/en) and MSCA CaLIGOLA (https://site.unibo.it/caligola/en), e
Notas de Coyuntura n° 2, 2024
En este breve documento intento realizar una lectura crítica de la situación de la educación chilena en la actualidad, mostrando como ella ha perdido centralidad entre las políticas públicas a pesar de que se mantienen graves problemas de calidad y equidad. Sugiero también iniciativas educativas principales a priorizar para que el gobierno del Presidente Boric termine su mandato. El documento fue publicado por las Fundaciones Horizonte Ciudadano y Ebert.
2005
The handling quality of a car is one of the most crucial parameters in the evaluation of the vehicle's overall performance. This quality is noticeably influenced by the structural and functional characteristics of the various components of the vehicle. The vehicle platform subsystems (i.e. steering, suspension, and braking) have major role in altering and tuning handling quality. It brings up special concerns in designing each of these mechanisms and need of having a comprehend understanding of their role in the handling characteristics of a vehicle. In this article, a general method for the optimization of steering system is presented. The investigation is focused on the geometrical parameters of a rack and pinion steering system, and their contribution on the handling characteristics. This kind of steering is common in medium class vehicles. A novel method is proposed to set the optimized geometry of the steering system, in particular its joint placements, by using a genetic-based approach. The cost function is composed of different criteria, which cover different aspects of handling characteristics. In order to eliminate the insignificant parameters, the sensitivity analysis is done using design of experiment method (DOE). A certified ADAMS model has been used as a benchmark to evaluate the presented model.
Encyclopedia, 2023
Gamification, or gameful design, refers to the strategic application of game design principles, mechanics, and elements into non-game environments. It is often facilitated using digital platforms, aiming to solve problems, increase engagement, and motivate individuals towards their goals. The technique fosters a gameful and interactive experience, enhancing perceived autonomy, competence, and relatedness among users. With roots in fields like education, business, marketing, and services, gamification is a versatile tool that serves to enrich user experience and create value in a multitude of settings. The widespread impact of gamification across various sectors has transformed traditional methods of engagement, notably in education.
Communications Materials, 2024
Hydrogen embrittlement (HE) is a major issue for the mechanical integrity of high-strength alloys exposed to hydrogen-rich environments, with diffusion and trapping of hydrogen being critical phenomena. Here, the role of microstructure on hydrogen diffusion, trapping and embrittlement in additively manufactured (AM) and wrought Inconel 718 is compared, revealing the key role played by dislocation cells. Trapping behaviour in hydrogen-saturated alloys is analysed by thermal desorption spectroscopy and numerical simulations. A high density of hydrogen traps in cell walls, attributed to dense dislocations and Laves phases, are responsible for the local accumulation of hydrogen, causing significant loss in strength, and triggering cracking along dislocation cell walls. The influential role of dislocation cells alters fracture behaviour from intergranular in the wrought alloy to intragranular for the AM alloy, due to the large proportion of dislocation cells in AM alloys. In addition, the cellular network of dislocations accelerates hydrogen diffusion, enabling faster and deeper penetration of hydrogen in the AM alloy. These results indicate that the higher HE susceptibility of nickel superalloys is intrinsically associated with the interaction of hydrogen with dislocation walls.
Narrativas, Geografias e Cartografias, 2020
Oikos Nomos: Jurnal Kajian Ekonomi dan Bisnis, 2024
Ingeniería naval, 2010
Revista GEARTE, 2021
BMC Health Services Research, 2010
Revista de Sociologia e Política
2015
Immunity, 1998
European Journal of Cell Biology, 2009
The Journal of Markets and Morality, 2020
Why in Islamic tradition the idea of communicating with the deceased is not allowed, 2024
INTERNATIONAL JOURNAL OF ENDORSING HEALTH SCIENCE RESEARCH (IJEHSR), 2017