Topic
Valency
About: Valency is a research topic. Over the lifetime, 1632 publications have been published within this topic receiving 26141 citations.
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TL;DR: In this paper, it was shown that there are infinitely many 3-geodesic transitive but not 3-arc transitive graphs of girth with arbitrarily large diameter and valency.
Abstract: In this paper, we first prove that for , there are infinitely many 3-geodesic transitive but not 3-arc transitive graphs of girth with arbitrarily large diameter and valency. Then we classify the family of 3-geodesic transitive but not 3-arc transitive graphs of valency 3 and those of valency 4 and girth 4.
6 citations
TL;DR: In this paper, band structure calculations with the full-potential linear augmented plane wave method were performed for the high-Tc related oxides, La2CuO4 and YBa2Cu3Oy with y = 6 and 7.
Abstract: Band-structure calculations with the full-potential linear augmented plane wave method were performed for the high-Tc related oxides, La2CuO4 and YBa2Cu3Oy with y = 6 and 7. Implications of the calculated results are discussed in relation to Cu valency and photoemission experiments.
6 citations
TL;DR: This study quantifies the evolving valence hole charge distribution in the photoexcited charge transfer state of a prototypical mixed valence bimetallic iron-ruthenium complex in water by combining femtosecond X-ray spectroscopy measurements with time-dependent density functional theory calculations of the excited-state dynamics.
Abstract: Quantifying charge delocalization associated with short-lived photoexcited states of molecular complexes in solution remains experimentally challenging, requiring local element specific femtosecond experimental probes of time-evolving electron transfer. In this study, we quantify the evolving valence hole charge distribution in the photoexcited charge transfer state of a prototypical mixed valence bimetallic iron-ruthenium complex, [(CN)5FeIICNRuIII(NH3)5]-, in water by combining femtosecond X-ray spectroscopy measurements with time-dependent density functional theory calculations of the excited-state dynamics. We estimate the valence hole charge that accumulated at the Fe atom to be 0.6 ± 0.2, resulting from excited-state metal-to-metal charge transfer, on an ∼60 fs time scale. Our combined experimental and computational approach provides a spectroscopic ruler for quantifying excited-state valency in solvated complexes.
6 citations
Book Chapter•
01 Jan 2010
TL;DR: It is shown how verb valency data, added to the Croatian dictionary in NooJ, enhances recognition of VP as well as NP and PP parts of a sentence, in order to obtain better, improved Croatian chunker results.
Abstract: In this paper authors will show how verb valency data, added to the Croatian dictionary in NooJ, enhances recognition of VP as well as NP and PP parts of a sentence At the Department of Information Sciences two parallel PhD Theses were being developed One is construction of a chunker for Croatian using NooJ and the other one is construction of Croatian verb valency lexicon (CRVLLEX) Here we combined the two projects by adding the data from CRVLLEX to the existing NooJ dictionary hoping thus to obtain better, improved Croatian chunker results Our dictionary has over 36 000 entries of which 1 884 are verbs Each verb is only marked by its category and the FLX Additional data is being added from the CRVLLEX Theoretic motivation behind the construction of CRVLLEX is Praha’s Dependency Treebank (PDT) but also good Czech verb valency dictionaries (VALLEX and Verbalex) So far, CRVLLEX has 1 739 verbs with 5 118 valency frames (approx 3 frames per verb) and 173 syntactic-semantic classes Each word entry in CRVLLEX contains headword lemma, reflexivity example (depending whether the verb is reflexive or not) and frame entry which is the part that describes the valency frame for each verb Every verb also has the following attributes: aspect, frequency and form, which we hope will be of great importance in disambiguating parts of a sentence surrounding the verb
6 citations