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Nombre de programmes trouvés : 4838
Conférences

le (1h3m17s)

Alexandra Aikhenvald (Central Queensland University), The Web of knowledge: Evidentiality at the crossroads

Knowledge can be expressed in language using a plethora of grammatical means. Four major groups of meanings related to knowledge are Evidentiality: grammatical expression of information source; Egophoricity: grammatical expression of access to knowledge; Mirativity: grammatical expression of expectation of knowledge; and Epistemic modality: grammatical expression of attitude to knowledge. The four groups of categories interact. Some develop overtones of the others. Evidentials stand apart from other means in many ways, including their correlations with speech genres and social environment. This essay presents a framework which connects the expression of knowledge across ...
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le (1h7m43s)

Pr. Bernd Heine (Köln University), "The grammar of interactives: The challenge of discourse"

Most work on grammatical analysis has focused on the structure of clauses and sentences organized in a propositional format. Work on discourse processing and the organization of texts suggests, however, that there are many linguistic phenomena that are elusive to a description in terms of ‘sentence grammar’. A number of frameworks, commonly known as ‘dual process models’ (e.g., Evans and Stanovich, 2013; Heine, 2019), have been proposed to account for such phenomena and their psychological and neurolinguistic correlates (e.g., Marini et al., 2005; Haselow, 2019). Based on this line of research, the ...
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le (59m40s)

Jan Nuyts (University of Antwerp), On the relations between evidentiality and modality

This talk focuses on whether or not the domains of evidentiality and modality relate, and if so, how they relate. The literature does not give a simple answer to this question, mainly because evidentiality and modality are both cover-terms for distinct categories, and the categories within each of the two domains are conceptually quite divergent. In line with what I suggested in earlier work, I will argue that some modal and evidential categories are more closely related with each other than they are with some of the other categories in their own domains. This means by implication that the traditional ...
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Conférences

le (39m15s)

Hermenegildo García - Getting closer to a large scale process. Photocatalysts for light-assisted CO2 hydrogenation

There is an urgent need to diminish atmospheric CO2 emissions to meet with the International agreements on global warming and climate change. One of the possible strategies is the utilization of CO2 as feedstock of fuels and chemicals. Among the possible reactions, CO2 hydrogenation can give a wide variety of products from methane to light hydrocarbons and alcohols of high added value. However, due to its high chemical stability, CO2 transformation requires a considerable amount of energy to run the reaction at temperatures above 450 oC and high pressure. In this context, ...
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Conférences

le (30m16s)

Jesus Iniesta - Electrochemical and structural characterization of mixed matrix membrane coated electrodes for CO2 electroreduction

The need for novel membrane coated electrodes (MCE) for the electrochemical reduction of carbon dioxide (CO2RR) may offer advantages in terms of control of reaction, catalytic activity and stability of the electrode. The study of the possibilities of mixed matrix membrane (MMM) overlayers with tuneable ion-exchangeable, conductive and transport properties are essential targets for the performance of the MCEs for electrochemical applications. The knowledge on the effect of local pH and CO2 concentration diffusion to catalyst site, among others, on the selectivity of the CO2 electroreduction to high added-value products under ...
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Conférences

le (25m20s)

Geyla Dubed Bandomo - CO2 conversion with {Mn(CO)3Br} molecular sites into Covalent-Organic Frameworks

Effective large-scale CO2 conversion to fuels or value-added chemicals using renewable energies is critical to reduce our environmental impact [1]. To this end, better understanding of the CO2 mechanism is needed to develop efficient and selective catalysts that operates in water controlling H2 evolution. Covalent Organic Frameworks (COFs) are reticular materials, which can be used to combine the advantages of the well-defined molecular catalysts and the heterogeneous ones [2]. In this work, we present the first COF based on tricarbonyl Mn units, that by π-π stacking is attached to MWCNTs form electrocatalytic electrodes active for CO2 reduction in neutral water. ...
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