Search results for " SEM"
showing 10 items of 1467 documents
Phonon Scattering through a Local Anisotropic Structural Disorder in the Thermoelectric Solid Solution Cu_2Zn_(1−x)Fe_xGeSe_4
2013
Inspired by the promising thermoelectric properties of chalcopyrite-like quaternary chalcogenides, here we describe the synthesis and characterization of the solid solution Cu(2)Zn(1-x)Fe(x)GeSe(4). Upon substitution of Zn with the isoelectronic Fe, no charge carriers are introduced in these intrinsic semiconductors. However, a change in lattice parameters, expressed in an elongation of the c/a lattice parameter ratio with minimal change in unit cell volume, reveals the existence of a three-stage cation restructuring process of Cu, Zn, and Fe. The resulting local anisotropic structural disorder leads to phonon scattering not normally observed, resulting in an effective approach to reduce th…
Oligothiophenes for Pattern Formation by Stamping
2003
Oligothiophene monomers with a fixed length varying from 3 to 5 thiophene rings were prepared by Stille coupling. They were functionalised with one or two methacrylate groups to allow polymerization and cross-linking. These monomers can be patterned with the help of soft silicon stamps (e.g., with the micro-injection moulding in capillaries process) on substrates like glass or flexible polymer foils. If a photoinitiator has been added, they can then be hardened by exposure to UV-light through the transparent stamp. Afterwards the stamp can be removed. This allows the preparation of several centimeters long oligothiophene lines of a width varying between 50 and 0.5 μm. These lines of semicon…
Sémantique discursive cognitive.
2022
Langue et connaissances sont dans la recherche actuelle travaillées sous l’angle du discours. Son étude linguistique permet d’identifier des figements en tant qu’expressions de routines sociales et cognitives. Cette approche exploite deux outils : les constructions en tant qu’appariements de sens et de forme, et les frames en tant qu’unités minimales de connaissances partagées. Il convient alors de construire théoriquement cette association, encore inédite en analyse du discours. Un protocole méthodologique de linguistique du corpus opérationnalise l’approche développée. Puis, une analyse empirique d’un corpus de publicités du vin issues de prospectus de supermarchés autrichiens permet de v…
How domain-sensitive are existential constructions? Evidence from Swedish and Dutch weather reports
2020
International audience; [Introduction] Over the last two decades, linguists have shown considerable interest in the advantages of CxG-theories for various linguistic sub-disciplines. A particular question that has arisen within more “applied” frameworks, is whether or not constructions can have domain-specific manifestations regarding meaning and/or form (Fischer/Nikiforidou 2015; Bücker/Günther/Imo 2015; Gautier/Bach 2019). However, sufficient empirical analyses are currently missing, and this research question needs to be more systematically tested for constructions in various languages and different LSP-oriented domains. Beside the mere “applied” focus, such work can lead to interestin…
Tra norme e convenzioni. Ipotesi sul senso letterale
2015
La nozione di signifcato letterale è al centro di un dibattito che coinvolge fgure disciplinari eterogenee: teorici del diritto, studiosi di semiotica e flosof del linguaggio sono tra i principali protagonisti di un continuo lavoro di revisione teorica che ha come oggetto d’indagine questa nozione. I lavori di François Récanati, tra cui le ricerche confuite nel fondamentale Literal Meaning (2004), hanno contribuito ad accrescere e valorizzare l’importanza di molte questioni correlate. Il rapporto tra signifcato letterale e convenzioni è divenuto, in particolare, una tappa di rifessione obbligata: è frequente, infatti, presentare i signifcati letterali come signifcati stabilmente convenziona…
E-learning: Web-based education
2006
Purpose of review This review introduces state-of-the-art Web-based education and shows how the e-learning model can be applied to an anaesthesia department using Open Source solutions, as well as lifelong learning programs, which is happening in several European research projects. Recent findings The definition of the term e-learning is still a work in progress due to the fact that technologies are evolving every day and it is difficult to improve teaching methodologies or to adapt traditional methods to a new or already existing educational model. The European Community is funding several research projects to define the new common market place for tomorrow's educational system; this is le…
Le discours coranique : énonciation et énonciateurs
2018
The Qur'an, an omnipresent discourse via different media, has been a constant source of attention since the beginning of writing in the Arab sphere; writing as a composition of works because culture was, before the Koran, oral. From then until today, he remains an inexhaustible object of study and speculation. The language sciences are not sufficiently exploited to explore its mysteries as a unique religious discourse. Linguistic studies were limited to the linguistic domains of Arabic such as syntax and rhetoric which attempted to resurrect what makes the Koran an inimitable discourse as it presents itself and as presented by Islamic Tradition. This work aims at an analysis that draws mode…
COLTIVAZIONE DI PIANTE OFFICINALI ANNUALI DA SEME CON TECNICHE ECOCOMPATIBILI
2009
La Sicilia, caratterizzata da un’ampia variabilità pedo-climatica e da una notevole ricchezza di paesaggi naturali e tradizioni popolari, è sede ideale per la valorizzazione delle risorse vegetali di interesse officinale spontanee o spontaneizzate nell’area mediterranea, da introdurre o diffondere in coltivazione. Sulla base di questa premessa, allo scopo di valorizzare alcune specie officinali mediterranee, è stata condotta una sperimentazione pluriennale, che ha riguardato la coltivazione in pieno campo di tali specie, con tecniche ecocompatibili. Scopo della ricerca è stato quindi la messa a punto dei principali aspetti dell’agrotecnica applicabile ad alcune specie officinali di possibil…
Modality and Uncertainty in Data Visualizations: A Corpus Approach to the Use of Connecting Lines
2020
In data visualizations, connecting lines may have various semiotic functions, including the semiotic potential of indicating modality and uncertainty. The goal of this article is to find out how this semiotic potential is realized in current best practices of data visualizations and what conventions exist for the visual manifestations of these functions. This issue is addressed by using a corpus-based approach and a two-level analysis method within a social semiotic framework. First, the article offers a theoretical discussion on how the concepts of modality and uncertainty interrelate. Second, a method for investigating how these concepts are visualized at different levels is presented. Th…
Tra ambiguità e malinteso: schermaglie di una «battaglia per l’identità» in una conversazione tra mafiosi
2015
Gli scambi comunicativi tra membri di Cosa Nostra sono regolati dalla duplice restrizione della legge del silenzio verso il mondo esterno e dall'obbligo di dire la verità all'interno del sodalizio. A tal fine, il linguaggio mafioso ricorre all’obliquità semantica che fornisce ai parlanti un ampio margine di libertà consentendo loro di non esplicitare le proprie reali intenzioni. È questa la ragione per la quale Tommaso Buscetta ha definito Cosa Nostra come "il regno dei discorsi incompleti". L'ordine del discorso mafioso si basa spesso sulla pratica di quello che Jankélévitch ha definito il "malinteso doppiamente beninteso” uno scambio che si fonda non tanto su una falsa relazione quanto su…