Graphical Calculus for the Double Affine Q-Dependent Braid Group

We define a double affine $Q$-dependent braid group. This group is constructed by appending to the braid group a set of operators $Q_i$, before extending it to an affine $Q$-dependent braid group. We show specifically that the elliptic braid group and the double affine Hecke algebra (DAHA) can be obtained as quotient groups. Complementing this we present a pictorial representation of the double affine $Q$-dependent braid group based on ribbons living in a toroid. We show that in this pictorial representation we can fully describe any DAHA. Specifically, we graphically describe the parameter $q$ upon which this algebra is dependent and show that in this particular representation $q$ corresponds to a twist in the ribbon

Long- and short-term solutions for mitigating hazardous noise exposure and noise levels on board vessels from the small-scale fishing fleet of Newfoundland and Labrador

Fish harvesting in Newfoundland and Labrador (NL) is prominently a small-scale industry. This is an important activity in the rural NL, providing a mean of livelihood and identity to many coastal communities. Fishing is also one of the most dangerous professions both in the province and worldwide, with high incidence of reported casualties, accidents, and injuries. Among many health and safety issues of the fish harvesting profession, elevated noise levels pose a subtle threat. Prolonged exposure to noise is known to induce noise-induced hearing loss (NIHL), and high noise levels are known to reduce the habitability of fishing vessels, increase fatigue, and ultimately add to the risk of accidents and injuries. This PhD research aims to assess noise-related hazards on the small-scale NL fishing fleet (less than 24m length overall) and to provide short-term (minimal vessel and gear modification, use of protection devices), and long-term (integration of an acoustic design for noise control on fishing vessels) solutions to mitigate on-board high noise levels and exposures. The research features: a) a comprehensive survey of noise levels and occupational noise exposures on-board a representative sample of 12 vessels, in order to identify the dominant noise sources, measure the in-situ acoustic insulation, assess the compliance with habitability criteria of living spaces and the risk of hazardous noise exposures; b) the study of the perception of risk of noise-related hazards from owner/operators of the fleet; c) the development of a numerical model validated using experimental data for the acoustic transmission and the study of possible noise control interventions to mitigate noise to acceptable levels on a case study vessel. In this research activity a job-based method for noise exposure assessment was used, as opposed to the task-based method used in other studies on fishing vessels, and the noise components that lead to hazardous noise exposures were identified in order to provide effective solutions to mitigate noise exposure. Furthermore, for the first time state-of-the-art Statistical Energy Analysis (SEA) and graph theory were used to model noise transmission on a small-sized fishing vessel and reveal the dominant noise transmission mechanisms. Based on these findings, effective noise control interventions were proposed and evaluated. These assessments are necessary to provide recommendations and guidelines, and introduce design and operational criteria to control noise levels on small fishing vessels from NL and worldwide more in general. Indeed, noise control solutions identified in the case-study vessel can be used on similar vessels, and the numerical method based on SEA as shown in this research can be applied to design of noise control on new vessels

From mockups to user interface models: An extensible model driven approach

Sketching web applications with mockup tools is a common practice that improves the process of elicitation and validation of requirements in web applications. However, mockups are used as a "quick and dirty" way of gathering requirements, thus discarded before development. As a consequence, concepts captured in them are usually lost in the manual transformation between mockups and the final user interface. In this paper we present a model-driven approach that overcomes this problem by importing mockups and then transforming them into a technology-dependent model. Development then begins from the imported version of the mockups.Publicado en Lecture Notes in Computer Science book series (LNCS, vol. 6385).Facultad de Informátic

From mockups to user interface models: An extensible model driven approach

Sketching web applications with mockup tools is a common practice that improves the process of elicitation and validation of requirements in web applications. However, mockups are used as a "quick and dirty" way of gathering requirements, thus discarded before development. As a consequence, concepts captured in them are usually lost in the manual transformation between mockups and the final user interface. In this paper we present a model-driven approach that overcomes this problem by importing mockups and then transforming them into a technology-dependent model. Development then begins from the imported version of the mockups.Publicado en Lecture Notes in Computer Science book series (LNCS, vol. 6385).Facultad de Informátic

giotto-tda: A Topological Data Analysis Toolkit for Machine Learning and Data Exploration

We introduce giotto-tda, a Python library that integrates high-performance topological data analysis with machine learning via a scikit-learn-compatible API and state-of-the-art C++ implementations. The library's ability to handle various types of data is rooted in a wide range of preprocessing techniques, and its strong focus on data exploration and interpretability is aided by an intuitive plotting API. Source code, binaries, examples, and documentation can be found at https://github.com/giotto-ai/giotto-tda.Comment: 7 pages, 2 figure

From mockups to user interface models: An extensible model driven approach

Sketching web applications with mockup tools is a common practice that improves the process of elicitation and validation of requirements in web applications. However, mockups are used as a "quick and dirty" way of gathering requirements, thus discarded before development. As a consequence, concepts captured in them are usually lost in the manual transformation between mockups and the final user interface. In this paper we present a model-driven approach that overcomes this problem by importing mockups and then transforming them into a technology-dependent model. Development then begins from the imported version of the mockups.Publicado en Lecture Notes in Computer Science book series (LNCS, vol. 6385).Facultad de Informátic

Taxonomic Review of South American Butter Frogs: Phylogeny, Geographic Patterns, and Species Delimitation in the Leptodactylus latrans Species Group (Anura: Leptodactylidae)

The Leptodactylus latrans species group currently comprises eight medium- to large-sized frog species with a convoluted taxonomic history, particularly related to the specific limits of the L. latrans complex, and the species pair Leptodactylus chaquensis–Leptodactylus macrosternum. Their homogeneous external morphology and continental geographic distribution in South America have posed severe limitations to a comprehensive review, such that taxonomic consensus and species limits remain uncertain. This is further worsened by the presence of chromatic polymorphism among coexisting species that can hardly be distinguished by external morphology. Based on a large-scale geographic sampling including multilocus DNA analyses, and acoustic and morphological data, we provide a comprehensive evaluation of the taxonomic status and species limits of the L. latrans group, focusing on the resolution of the L. latranscomplex and the species pair L. chaquensis–L. macrosternum. We gathered 728 mitochondrial sequences from 429 localities, encompassing the entire geographic distribution of the group. Both generalized mixed Yule coalescent and automatic barcode gap discovery species delimitation methods recovered four major mitochondrial evolutionary lineages within the L. latrans complex, also supported by distribution patterns, multilocus molecular, morphological and/or bioacoustic data. One lineage is linked to nominal L. latrans,one revalidated as Leptodactylus luctator, and the other two are formally named and described. Another lineage encompasses all specimens previously assigned to the species pair L. chaquensis–L. macrosternum, clustered as a single evolutionary entity and is now regarded as L. macrosternum. We provide a revised diagnosis for these species based on acoustic data, morphological/chromatic variation, and phylogenetic relationships of all species currently included in the L. latrans group. Our findings reinforce the view that Neotropical diversity is highly underestimated and stress that appropriate geographic sampling in an integrative framework is crucial for the establishment of specific limits among broadly distributed and morphologically cryptic Neotropical frogs

Identification and evaluation of antioxidant and reference genes for quantitative real-time PCR in blood of Caiman latirostris

The quantitative real-time polymerase chain reaction (qPCR) has been one of the most promising approaches to perform rapid and accurate quantification of DNA in various biological systems. The aim of this study was to standardized the qPCR technique for the analysis of important genes involved in the main routes of antioxidant defense against reactive oxygen species (catalase: cat and superoxide dismutase: sod) and evaluate the stability of different reference genes in blood of Caiman latirostris hatchlings. The stability of the reference genes, β-actin, glyceraldehyde 3-phosphate dehydrogenase (gapdh) and ribosomal protein L8 (rpl8) was determined using the comparative ΔCt, NormFinder, geNorm, BestKeeper and RefFinder. Then, cat and sod genes were normalized with each reference gene and their mRNA abundances were determined through the qPCR. Stability of genes was ranked through the different methods in the following order: β-actin, rpl8 and gapdh, under normal physiological conditions. The results reveal that cat and sod genes present a similar relative mRNA abundance with β-actin and rpl8. This is the first report of the analysis of antioxidant mRNA as potential biomarkers of oxidative stress in blood for all crocodilians species. Besides, we determined the stability of different reference genes that can be used for normalization of mRNA abundance patterns in blood of C. latirostris, without the need to sacrifice the animals.Fil: Odetti, Lucia Magdalena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Cátedra de Toxicología y Bioquímica Legal; ArgentinaFil: Paravani, Enrique Valentin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional de Entre Ríos. Facultad de Ingeniería; ArgentinaFil: Simoniello, Maria Fernanda. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Cátedra de Toxicología y Bioquímica Legal; ArgentinaFil: Poletta, Gisela Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Cátedra de Toxicología y Bioquímica Legal; Argentina. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias. Departamento de Ciencias Naturales. Laboratorio de Zoología Aplicada: Anexo Vertebrados (FHUC-UNL/MASPyMA); Argentin

Constructing Hecke-type Structures, their Representations and Applications

This thesis is primarily concerned with the construction of a large Hecke-type structure called the double ane Q-dependent braid group. The signicance of this structure is that it is located at the top level of the hierarchy of all other structures that are known to be related to the braid group. In particular, as specialisations we obtain the Hecke algebra, in addition to the ane Hecke algebra, even the double ane Hecke algebra and also the elliptic braid group. To render the algebraic description of this group more accessible, we present an intuitive graphical representation that we have specically developed to fully capture all of its structure. Contained within this representation are representations of all of the afore mentioned algebras which all contain the braid group as primary element. We also present nite dimensional matrix representations of ane Hecke algebras, emerging from tangles. Using these tangles we also obtain representations of the Temperley-Lieb algebra and the ane braid group. We conclude this thesis with our interpretation of the central role of the Hecke algebra in the development of knot theory. More specically we explicitly derive the HOMFLY and Jones polynomials