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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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01 Jan 2013
TL;DR: One of the main aims here is the support of computer analysis of Czech, thus machine-readable features of the lexicon are emphasized since the beginning of the development of the Czech valency dictionary called VerbaLex.
Abstract: In the paper, we present the current state of the development of the Czech valency dictionary called VerbaLex. It contains a list of the most frequented Czech verbs and their valency frames in the form of the complex valency frames. VerbaLex includes information about verb case and adverbial links (morphosyntactic properties) and senses captured by an inventory of two-layer semantic roles that characterize the semantics of the verb arguments. We also present the motivation and history of the design of the complex valency frames and the VerbaLex lexicon. One of the main aims here is the support of computer analysis of Czech, thus machine-readable features of the lexicon are emphasized since the beginning. Presently, we can refer to VerbaLex electronic version with more than 10 thousand verb lemmata, as well as to its printed form with a selected subset of the most frequent verbs. The full electronic form is available on-line after registration for academic and non-commercial purposes.
Journal ArticleDOI
TL;DR: It is shown that Ln can engage in covalent bonding with boron, and, in some members of the LnB6 family, also easily access alternative bonding states through the electron-phonon coupling.
Abstract: Lanthanide hexaborides (LnB6 ) have disparate and often anomalous properties, from structurally homogeneous mixed valency, to superconductivity, spectral anomalies, and unexplained phase transitions. It is unclear how such a diversity of properties may arise in the solids of identical crystal structures and seemingly very similar electronic structures. Building on our previous model for SmB6 (mixed valent, with a peak in specific heat, and pressure induced magnetic phase transitions), we present a unifying dynamic bonding model for LnB6 that explains simultaneously EuB6 (possessing an anomalous peak in specific heat at low T, magnetic phase transitions, and no mixed valency), YbB6 (mixed valent topological insulator), and rather ordinary LaB6 . We show that Ln can engage in covalent bonding with boron, and, in some members of the LnB6 family, also easily access alternative bonding states through the electron-phonon coupling. The accessibility, relative energetics, and bonding nature of the states involved dictate the properties.
Journal ArticleDOI
TL;DR: In this paper , it was shown that all finite groups generated by at most two elements admit an oriented m-semiregular representation (OmSR) of valency two except four groups of small orders.

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202377
2022190
202119
202029
201937
201829