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HNN- EXTENSIONS OF FINITE INVERSE SEMIGROUPS
(POLITECNICO DI M ILANO D EPARTMENT OF M ATHEMATICS, 2014)
The concept of HNN-extensions of groups was introduced by Higman, Neumann and Neumann in 1949. HNN-extensions and amalgamated free products have played a crucial role in combinatorial group theory, especially for algorithmic ...
CONTEXT-FREENESS OF THE LANGUAGES OF SCH UTZENBERGER AUTOMATA OF HNN-EXTENSIONS OF FINITE INVERSE SEMIGROUPS
(PUBLICATIONS DE L'INSTITUT MATHEMATIQUE, 2016)
We prove that the Schutzenberger graph of any element of the HNN-extension of a fnite inverse semigroup S with respect to its standard presentation is a context-free graph, showing that the language L recognized by this ...
Undecidability of the word problem for Yamamura’s HNN-extension under nice conditions
(Semigroup Forum, 2016-04)
The solvability of the word problem for Yamamura’s HNN-extensions [S; A1, A2; ϕ] has been proved in some particular cases. However, we show that, contrary to the group case, the word problem for [S; A1A2; ϕ] is undecidable ...
Combining field performance with controlled environment plant imaging to identify the genetic control of growth and transpiration underlying yield response to water-deficit stress in wheat
(2015-07-15)
Crop yield in low-rainfall environments is a complex trait under multigenic control that shows significant genotype×environment (G×E) interaction. One way to understand and track this trait is to link physiological studies ...
Accounting for variation in designing greenhouse experiments with special reference to greenhouses containing plants on conveyor systems
(BioMed Central, 2013)
Background: There are a number of unresolved issues in the design of experiments in greenhouses. They include
whether statistical designs should be used and, if so, which designs should be used. Also, are there
thigmomorphogenic ...
Optimal designs for contingent response models with application to toxicity and efficacy
(Issac Newton Institute for Mathematical Sciences, 2011-12)
We generalize results in the literature to obtain a general family contingent response
models. These models have ternary outcomes constructed from two Bernouli outcomes,
where one outcome is only observed if the other ...
Variation for N uptake system in maize: genotypic response to N supply
(Frontiers, 2015)
An understanding of the adaptations made by plants in their nitrogen (N) uptake systems in response to reduced N supply is important to the development of cereals with enhanced N uptake efficiency (NUpE). Twenty seven ...
Heat susceptibility of grain filling in wheat (Triticum aestivum L.) linked with rapid chlorophyll loss during a 3-day heat treatment
(Springer, 2016)
Brief heat events (1–3 days, >30 °C) commonly reduce wheat (Triticum aestivum L.) grain size and consequently yield. To identify mechanisms of tolerance to such short heat events, 36 wheat genotypes were treated under ...
Variation in shoot tolerance mechanisms not related to ion toxicity in barley
(CSIRO, 2017)
Soil salinity can severely reduce crop growth and yield. Many studies have investigated salinity tolerance mechanisms in cereals using phenotypes that are relatively easy to measure. The majority of these studies measured ...
A simulation study to assess a variable selection method for selecting single nucleotide polymorphisms associated with disease
(Mary Ann Liebert, Inc. 140 Huguenot Street, 3rd Floor New Rochelle, NY 10801 USA, 2012)
In genome-wide association studies, where hundreds of thousands of single nucleotide polymorphisms (SNPs) are genotyped, the potential for false positives is high and methods for selecting models with only a few SNPs are ...