Search results for "CMA"
showing 10 items of 188 documents
First-year university students making sense of symbols in integration
2020
International audience; This paper focuses on first year university engineering students and their sensemaking of integration and its symbolism. Through a semiotic approach, attention is given to two students and their attempt to verbally express their reflections on integration and the related meaning of symbols. Findings suggest that students tend to interpret the symbols mainly as operations, in terms of calculations to be carried out. They express uncertainty concerning what the symbols stand for, and the mathematical objects they represent. For example, the symbols ∫ and are respectively conceived of as “finding the integral with respect to x” and students are unclear on how Riemann su…
More Power through Symbolic Computation: Extending Stata by using the Maxima Computer algebra system
2015
Maxima is a free and open-source computer algebra system that can perform symbolic computations such as solving equations, determining derivatives of functions, obtaining Taylor series, and manipulating algebraic expressions. In this article, I present the Maxima Bridge System, which is a collection of software programs that allows Stata to interface with Maxima so that Maxima can be used for symbolic computation to transfer data from Stata to Maxima and to retrieve results from Maxima. The cooperation between Stata and Maxima provides an environment for statistical analysis in which symbolic computation can be easily used together with all the facilities supplied by Stata. In this environ…
MOESM2 of Global mapping of randomised trials related articles published in high-impact-factor medical journals: a cross-sectional analysis
2020
Additional file 2. Data extraction and normalisation processes.
MOESM2 of Global mapping of randomised trials related articles published in high-impact-factor medical journals: a cross-sectional analysis
2020
Additional file 2. Data extraction and normalisation processes.
Negative results in the theory of games with lexicographic utilities
2003
When players may have lexicographic utilities, there are: (i) extensive games having a non-empty set of equilibria but empty sets of sequentially rational, sequential and perfect equilibria (ii) normal form games having a non-empty set of equilibria but an empty set of proper equilibria and no stable set of equilibria and (iii) two extensive games having the same normal form representation and disjoint sets of sequential equilibria.
Some decisional problems on rational relations
1997
Abstract In this paper we prove that the problem of deciding whether a deterministic rational relation is star-free is recursively solvable, although the same problem for any rational relation is undecidable. We also prove that a rational relation is star-free if and only if it is aperiodic and deterministic.
A remark on hyperplane sections of rational normal scrolls
2017
We present algebraic and geometric arguments that give a complete classification of the rational normal scrolls that are hyperplane section of a given rational normal scrolls.
An example of interplay between Physics and Mathematics: Exact resolution of a new class of Riccati Equations
2017
A novel recipe for exactly solving in finite terms a class of special differential Riccati equations is reported. Our procedure is entirely based on a successful resolution strategy quite recently applied to quantum dynamical time-dependent SU(2) problems. The general integral of exemplary differential Riccati equations, not previously considered in the specialized literature, is explicitly determined to illustrate both mathematical usefulness and easiness of applicability of our proposed treatment. The possibility of exploiting the general integral of a given differential Riccati equation to solve an SU(2) quantum dynamical problem, is succinctly pointed out.
La lexicografia catalana actual
1994
In this paper a general analysis of the evolution and current State of modem Catalan lexicography is undertaken, which starts with the setting up of a catalogue of lexicographic publications from 1940 onwards. In addition to the quantitative analysis of published dictionaries the paper introduces a typology study in order to sort out the variety and richness of modem Catalan lexicography. In the paper relevant data is presented on the situation of Catalan lexicography with respect to the quantity of existing dictionaries, and also on the factors that have determined their variety. Finally it can serve to establish the bases to build a lexicographic plan that helps to fill the gaps and avoid…
Crowd-out effect on consumers attitude towards corporate social responsibility communication
2022
Corporate social responsibility (CSR) is assumed to function better in open societies and competitive markets where market forces drive communication and voluntary adoption of self-regulated quality CSR practices. Thus, the common wisdom maintains that consumer awareness of positive CSR activities of an organisation elicits positive perceptions about the organisation. Contrarily, we find negative and insignificant effect of CSR communication on perceived CSR performance in the context of Norway. The findings are consistent with predictions of crowding-out theory which submits that moderately enforced government policies can displace consumers’ intrinsic motivations to contribute to public g…