Search results for "non-Standard"

showing 3 items of 33 documents

On Prefix Normal Words

2011

We present a new class of binary words: the prefix normal words. They are defined by the property that for any given length $k$, no factor of length $k$ has more $a$'s than the prefix of the same length. These words arise in the context of indexing for jumbled pattern matching (a.k.a. permutation matching or Parikh vector matching), where the aim is to decide whether a string has a factor with a given multiplicity of characters, i.e., with a given Parikh vector. Using prefix normal words, we give the first non-trivial characterization of binary words having the same set of Parikh vectors of factors. We prove that the language of prefix normal words is not context-free and is strictly contai…

permutation matchingcontext-free languagesSearch engine indexingpre-necklacesBinary numberParikh vectorsComputer Science::Computation and Language (Computational Linguistics and Natural Language and Speech Processing)Lyndon wordsnon- standard pattern matchingLyndon wordsCombinatoricsPrefixjumbled pattern matchingPattern matchingParikh vectors; pre-necklaces; Lyndon words; context-free languages; jumbled pattern matching; permutation matching; non- standard pattern matching; indexingComputer Science::Formal Languages and Automata TheoryParikh vectors pre-necklaces Lyndon words context-free languages jumbled pattern matching permutation matching non-standard pattern matching indexingMathematicsindexing
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Pyrazole amino acids: hydrogen bonding directed conformations of 3-amino-1H-pyrazole-5-carboxylic acid residue

2017

A series of model compounds containing 3-amino-1H-pyrazole-5-carboxylic acid residue with N-terminal amide/urethane and C-terminal amide/hydrazide/ester groups were investigated by using NMR, Fourier transform infrared, and single-crystal X-ray diffraction methods, additionally supported by theoretical calculations. The studies demonstrate that the most preferred is the extended conformation with torsion angles ϕ and ψ close to ±180°. The studied 1H-pyrazole with N-terminal amide/urethane and C-terminal amide/hydrazide groups solely adopts this energetically favored conformation confirming rigidity of that structural motif. However, when the C-terminal ester group is present, the second con…

pyrazolenon-standard amino acidRamachandran diagramesteramidehydrazideJournal of Peptide Science
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Stabilise, balance and adjust : Framing the early years transitions of children whose parents work non‐standard hours

2022

This study examined talk by parents about the early years transitions of their children (n = 7) in the context of parental non-standard working hours and Finnish early childhood education and care (ECEC) services. Parents were interviewed at three time points: when their child was aged one, four, five or six years (a total of 21 interviews). The third interview was conducted during the COVID-19 pandemic. This article focuses on the children's ECEC transitions and the interpretative frames used by parents when talking about their work and childcare. The frames used by the parents to discuss the children's transitions were stabilising the children's lives, balancing between staying at home an…

varhaiskasvatusnon-standardworking hoursearly years transitionshorizontal transitionsCOVID-19 pandemicCOVID-19päivähoitodiskurssianalyysivanhemmatchildcare arrangementsearly childhood educationand carelife transitionslastenhoitosiirtymävaihediscourse analysisvertical transitionslapsen kehitys
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