Search results for " Materials Science"
showing 10 items of 7414 documents
2,3-Diphenylmaleimide 1-methylpyrrolidin-2-one monosolvate
2014
In the title compound, C16H11NO2·C5H9NO, the dihedral angles between the maleimide and phenyl rings are 34.7 (2) and 64.8 (2)°. In the crystal, the 2,3-diphenylmaleimide and 1-methylpyrrolidin-2-one molecules form centrosymmetrical dimersviapairs of strong N—H...O hydrogen bonds and π–π stacking interactions between the two neighboring maleimide rings [centroid–centroid distance = 3.495 (2) Å]. The dimers are further linked by weak C—H...O and C—H...π hydrogen bonds into a three-dimensional framework.
Structural analysis of two foldamer-type oligoamides – the effect of hydrogen bonding on solvate formation, crystal structures and molecular conforma…
2012
Author's Final draft The crystal structures and molecular conformations of two foldamer-type oligoamides were analyzed. One polymorphic form and seven solvates were found for N¹,N³-bis(2-benzamidophenyl)benzene-1,3-dicarboxamide (the benzene variant), and two polymorphic forms and six solvates for N²,N⁶-bis(2-benzamidophenyl)pyridine-2,6-dicarboxamide (the pyridine variant). Three crystal structures of the benzene variant and seven structures of the pyridine variant were solved using single crystal X-ray diffraction. The crystal structures showed that the different modes of intramolecular hydrogen bonding strongly affect the conformation and folding of the molecules, which is most evidently…
Identifying Vibrations that Control Non-adiabatic Relaxation of Polaritons in Strongly Coupled Molecule-Cavity Systems
2022
The strong light–matter coupling regime, in which excitations of materials hybridize with excitations of confined light modes into polaritons, holds great promise in various areas of science and technology. A key aspect for all applications of polaritonic chemistry is the relaxation into the lower polaritonic states. Polariton relaxation is speculated to involve two separate processes: vibrationally assisted scattering (VAS) and radiative pumping (RP), but the driving forces underlying these two mechanisms are not fully understood. To provide mechanistic insights, we performed multiscale molecular dynamics simulations of tetracene molecules strongly coupled to the confined light modes of an…
A corpus-based analysis of language ideologies in Hungarian school metalanguage
2013
The main goal of this paper is to present a recently built interview corpus called Corpus of Hungarian School Metalanguage – Interview Corpus (CHSM-IC) and its potential in language ideology studies. This corpus was compiled during a broad survey on Hungarian school metalanguage carried out in 2009 and was recently made available for a wider research community within the CESAR (Central and South-East European Resources) project. The study investigates interactional routines used in metadiscourses on language use. Printed texts cited from prestigious handbooks and interview data from CHSM-IC are compared. Thus, widely used, culturally-inherited text fragments are detected and confronted with…
The Latent Factors Behind the Urban Travel Behaviour
2014
Abstract This research aims to explore the impact of latent variables, mirroring the users’ preferences, on the individual decision making process regarding the mode of transport. The paper describes the first results of an ongoing research activity, which derives from a pilot study carried out in Palermo. The authors have administered to a sample of travellers a questionnaire and they simulated the mode choice behaviour referring to the random utility theory. Then the transport demand over the entire area of Palermo has been studied in order to design the cordon pricing scenario with the application of an additional cost on private car dedicated to a selected area of the historic centre of…
Layered Double Hydroxides: A Toolbox for Chemistry and Biology
2019
Layered double hydroxides (LDHs) are an emergent class of biocompatible inorganic lamellar nanomaterials that have attracted significant research interest owing to their high surface-to-volume ratio, the capability to accumulate specific molecules, and the timely release to targets. Their unique properties have been employed for applications in organic catalysis, photocatalysis, sensors, drug delivery, and cell biology. Given the widespread contemporary interest in these topics, time-to-time it urges to review the recent progresses. This review aims to summarize the most recent cutting-edge reports appearing in the last years. It firstly focuses on the application of LDHs as catalysts in re…
John Edgar Wideman, lecteur-archiviste de Frantz Fanon
2017
This article intends to read Fanon, a Novel, written in 2008 by John Edgar Wideman, as an attempt to decolonize the archive, more specifically the Fanonian archive. Rather than trying to exhume the legacy of the Martiniquan thinker, the novel proposes to set Fanon’s thought in motion, allowing it to unfold before the reader’s eyes. Thus summoned up, the archive assumes an eminently political role. No longer an origin in a teleological narrative, it can only be apprehended by a text that deliberately practices generic blurring and intermingling as a mode of writing. In Fanon, a Novel, the intersection between fiction and the archive serves as a productive space where national and colonial gr…
L’archive : horizons de la création contemporaine
2017
… archival art is as much preproduction as it is postproduction: concerned less with absolute origins than with obscure traces (perhaps “anarchival impulse” is the more appropriate phrase), these artists are often drawn to unfulfilled beginnings or incomplete projects—in art and in history alike—that might offer points of departure again. (Foster 5) L’archive dans la création contemporaine est l’objet d’une fascination qui, à chaque nouvelle rencontre, suscite la glose de la critique, des lec...
El tiempo de la vida: antropología, técnica y modernidad. Reflexión sobre la pérdida de sentido en el mundo actual
2017
El siguiente ensayo quiere mostrar cómo algunas de las teorías filosóficas y sociológicas más actuales mantienen una relación con aquello que teóricos de la historia conceptual, en su reflexión sobre la Modernidad, habían dispuesto en diferentes categorías y conceptos. Se hablará, en un primer momento, de las nociones esenciales del filósofo alemán Hans Blumenberg, en relación con las premisas antropológicas que dan respuesta al acontecer científico-técnico moderno. Esto servirá para adentrarse en el terreno de la Lebenswelt husserliana y producir así un rico diálogo entre Blumenberg y Husserl, destacando tanto puntos de encuentro como de divergencia sobre el papel de la ciencia. La última …
Optimizing the Shape of Welded Constructions Made through the Technique “Temper Bead Welding”
2020
Welded constructions are subject to high stresses during operation. One solution for improving the behavior in exploitation of welded constructions in various cases is to use the welding technique “temper bead welding” (TBW). In the paper, the optimization of the geometry of the welded joints by the TBW technique was performed. Thus, corner welded joints made of S355 steel were analyzed. To make the welded joints, three layers of welding seams were deposited, and the intermediate layers were processed through cutting with various radii. To analyze the influence of the size of these rays on the behavior of welded constructions, a research program based on factorial experiences wa…