Search results for "visti"
showing 10 items of 759 documents
Karplus-Type Dependence of Vicinal119Sn-13C and119Sn-1H Spin-Spin Couplings in Organotin(IV) Derivatives: A DFT Study
2009
The empirical Karplus-type dependence of (3)J((119)Sn,(13)C) and (3)J((119)Sn,(1)H) couplings in organotin(IV) derivatives has been computationally validated by DFT methods both at the nonrelativistic and scalar ZORA relativistic level. A preliminary calibration of the computational protocols, by comparing experimental and calculated couplings for a Set Of Suitable rigid molecules, revealed their high predictive power: in particular, relativistic results for (3)J((119)Sn,(13)C) have a mean absolute error of just above 2 Hz, over a range of values up to about 70 Hz. The latter protocol has then been used to study in detail the influence of substituents and multiple paths connecting the coupl…
Quantum and Classical Statistical Mechanics of the Non-Linear Schrödinger, Sinh-Gordon and Sine-Gordon Equations
1985
We are going to describe our work on the quantum and classical statistical mechanics of some exactly integrable non-linear one dimensional systems. The simplest is the non-linear Schrodinger equation (NLS) $$i{\psi _t} = - {\psi _{XX}} + 2c{\psi ^ + }\psi \psi $$ (1) where c, the coupling constant, is positive. The others are the sine- and sinh-Gordon equations (sG and shG) $${\phi _{xx}} - {\phi _{tt}} = {m^2}\sin \phi $$ (1.2) $${\phi _{xx}} - {\phi _{tt}} = {m^2}\sinh \phi $$ (1.3)
Relativistic DFT Calculation of (119)Sn Chemical Shifts and Coupling Constants in Tin Compounds.
2006
The nuclear shielding and spin-spin coupling constants of (119)Sn in stannane, tetramethylstannane, methyltin halides Me4-nSnXn (X = Cl, Br, I; n = 1-3), tin halides, and some stannyl cations have been investigated computationally by DFT methods and Slater all-electron basis sets, including relativistic effects by means of the zeroth order regular approximation (ZORA) method up to spin-orbit coupling. Calculated (119)Sn chemical shifts generally correlate well with experimental values, except when several heavy halogen atoms, especially iodine, are bound to tin. In such cases, calculated chemical shifts are almost constant at the scalar (spin-free) ZORA level; only at the spin-orbit level i…
A DFT study of the vicinal 3J(119Sn,13C) and 3J(119Sn,1H) coupling constants in trimethyl- and chlorodimethyl-stannyl propanoates.
2013
Abstract We have tested the performance of DFT protocols, both at the Scalar relativistic ZORA and non-relativistic level of theory, for the calculation of the 3 J( 119 Sn, 13 C) and 3 J( 119 Sn, 1 H) vicinal couplings for a series of flexible organotin(IV) derivatives with formula XMe2SnCHRCHR′COOMe (X = Me, Cl; R, R′ = Me, Ph). A satisfactory agreement between experimental and calculated vicinal couplings has been obtained by taking into account the conformational behaviour of the compounds investigated. The protocols used, mainly the relativistic one, were found to give a correct picture of the populations and a sufficiently high overall performance in calculating the vicinal couplings, …
Multisensory discourse resources : decolonizing ethnographic research practices
2020
Researchers have attempted to address the intersection of multisensory and multimodal discourse practices from an interactional perspective. This study argues for the value of experiential, non-interactional multisensory discourse resources and proposes a conceptual framework of multisensory discourse resources to bridge visual and family language ideology ethnography. A year-long ethnographic case study of three Nepalese families (immigrant and transmigrant), consisting of 150 h of observational data triangulated with qualitative interviews, posed two questions: (1) How do transnational families, in the homescape, use multisensory discourse resources to provide cultural, national, religiou…
Authenticity, normativity and social media
2015
‘We hugged each other during the cold nights’: the role of affect in an anti-deportation protest network in Finland
2021
This article analyses the role of affect and emotions in Finland’s first large-scale anti-deportation protest, the 2017 Right to Live protest in Helsinki. Despite deportation protests having recently gained scholarly attention, their emotional dimensions have not been sufficiently studied, especially as concerns the emotions of protestors with vulnerable legal status. This article is based on in-depth interviews with key activists in the anti-deportation protest network in Finland, including asylum seekers, refugees and Finnish citizens. The article argues that in order for the protest of asylum seekers facing the threat of deportation to become public and visible, it was important that cit…
Language and literature in context of culture
2002
Krājums sastāv no trim da|ām. Pirmajā daļā ietverti raksti par dažiem aktuāliem valodniecības un valodas politikas jautājumiem. Otrajā da|ā ievietotas literatūrzinātniskas apceres par mākslinieciskā laika un telpas, par mākslinieciskās formas elementiem un to izpausmēm atsevišķu autoru darbos, par dekadenci kā kultūrvēsturisku fenomenu un šī jēdziena vēstures iztirzājumu vācu un franču literatūrzinātnē. Rakstu krājuma trešā daļa veltīta dažiem mācību metodikas un pedagoģijas vēstures jautājumiem.