Academic literature on the topic 'Morphology homonymy paradigm geometry'

Crosslinguistically, children begin producing the person and number features of personal pronouns in a similar order. This article explored whether the same is true of verbal agreement morphology and evaluated three potential explanatory hypotheses which could account for a universal sequence of the development of phi features: the existence of an innate feature geometry, statistical properties in the input, and the organization of verbal paradigms. I examined these hypotheses in light of data from 20 bilingual children aged 2;00–3;06 years acquiring Basque and Spanish as well as child-directed speech from four adult speakers of Basque and Spanish. The results did not fit the predictions of the feature-geometric analysis nor the frequency-driven approach. However, there is evidence of paradigm building from the children’s early errors in the production of finite verbs.

Herein, we review printing technologies which are commonly approbated at recent time in the course of fabricating gas sensors and multisensor arrays, mainly of chemiresistive type. The most important characteristics of the receptor materials, which need to be addressed in order to achieve a high efficiency of chemisensor devices, are considered. The printing technologies are comparatively analyzed with regard to, (i) the rheological properties of the employed inks representing both reagent solutions or organometallic precursors and disperse systems, (ii) the printing speed and resolution, and (iii) the thickness of the formed coatings to highlight benefits and drawbacks of the methods. Particular attention is given to protocols suitable for manufacturing single miniature devices with unique characteristics under a large-scale production of gas sensors where the receptor materials could be rather quickly tuned to modify their geometry and morphology. We address the most convenient approaches to the rapid printing single-crystal multisensor arrays at lab-on-chip paradigm with sufficiently high resolution, employing receptor layers with various chemical composition which could replace in nearest future the single-sensor units for advancing a selectivity.

Background: This study aimed to introduce a novel analysis paradigm, referred to as 4-dimensional (4D) manometry based on biophysical analysis; 4D manometry enables the visualization of luminal geometry of the esophagus and esophagogastric junction (EGJ) using high-resolution-impedance-manometry (HRIM) data. Methods: HRIM studies from two asymptomatic controls and one type-I achalasia patient were analyzed. Concomitant fluoroscopy images from one control subject were used to validate the calculated temporal-spatial luminal radius and time-history of intraluminal bolus volume and movement. EGJ analysis computed diameter threshold for emptying, emptying time, flow rate, and distensibility index (DI), which were compared with bolus flow time (BFT) analysis. Results: For normal control, calculated volumes for 5 ml swallows were 4.1 ml–6.7 ml; for 30 ml swallows 21.3 ml–21.8 ml. With type-I achalasia, >4 ml of intraesophageal bolus residual was present both pre- and post-swallow. The four phases of bolus transit were clearly illustrated on the time-history of bolus movement, correlating well with the fluoroscopic images. In the control subjects, the EGJ diameter threshold for emptying was 8 mm for 5 ml swallows and 10 mm for 30 ml swallows; emptying time was 1.2–2.2 s for 5 ml swallows (BFT was 0.3–3 s) and 3.25–3.75 s for 30 ml swallows; DI was 2.4–3.4 mm2/mmHg for 5 ml swallows and 4.2–4.6 mm2/mmHg for 30 ml swallows. Conclusions: The 4D manometry system facilitates a comprehensive characterization of dynamic esophageal bolus transit with concurrent luminal morphology and pressure from conventional HRIM measurements. Calculations of flow rate and wall distensibility provide novel measures of EGJ functionality.

This paper studies the spatial characteristics of sky gardens as public spaces to explore their potential to support urban sustainability in dense cities. This research understands public spaces as spaces that are open and available in different levels of access and use. The research focuses on 982 sky gardens in Shenzhen, Hong Kong, and Singapore. It adopts a mixed methodology, including site visits and observations, statistic measurements (based on SPSS software), and Grey Relation Analysis (GRA) methods. The research follows three steps: first, it studies the urban context, including urban density, land uses, and policy regulations regarding sky gardens and sustainability. Second, it examines sky gardens’ spatial characteristics in terms of form (morphology, typology, size, affordances, configuration), openness quality (accessibility, ownership, permeability), and geometry (open space ratio, height of space-to-building, void-to-solid ratio, shape index). Third, the research compares the findings in three case cities and discusses their potential to support urban sustainability. The results suggest that despite the limitations of sky gardens, they may play, to different degrees, fundamental roles as open public spaces in high-density urban environments supporting cities’ sustainability. High-density environments offer more opportunities for the sustainable development of sky gardens, which creates a new spatial paradigm for compact vertical greenery in high-density cities.

Among multicellular organisms, the fossil record of vascular plants is, perhaps, uniquely informative about pattern and process leading to the establishment of major groups. Although classifications above the family level remain highly debatable, especially with regard to level, important insight has been gained into external morphology and internal anatomy of the earliest members of the clade, as well as into general patterns of diversification and change in form through time. Despite these advantages, cladistic methods have brought into sharp focus significant problems with important characters at high taxonomic levels. Putative synapomorphies used to diagnose major groups often have conflicting phylogenetic implications which, according to the cladistic paradigm, must be interpreted as homoplasy. From a biological standpoint, however, unrecognized instances of homoplasy in the character set often seem unlikely due to the complexity of the features involved, and the lack of plausible mechanisms producing multiple parallelisms or reversals by means of “known” processes such as adaptation, homeosis, heterochrony, or functional constraint. Added to this are conceptual and practical problems concerning morphological gaps (and what might bridge them) between recognized groups. One of the most interesting challenges to current approaches are enigmatic fossils early in the history of apparent clades exhibiting unprecedented variability in expression of supposedly diagnostic features. As a result, terminology originally developed to circumscribe alternative morphological states within clades completely breaks down. Perhaps, what's needed here is a more dynamic model of evolutionary change linking hypotheses of synapomorphy with specific changes in the structuring “rules” (or capacities) of development.Among characters used to diagnose major groups of vascular plants, differences in stelar architecture remain among the most important. Comparative evidence suggests that early vascular plants have essentially the same relatively well-understood developmental mechanisms as living plants; vascular tissues differentiate according to hormone (primarily auxin) gradient signals, that are the more-or-less the passive consequence of shoot geometry during growth. Because early plants have an extremely simple organography (dichotomizing stems with no leaves), an unparalleled opportunity exists to understand historical changes leading to establishment of major stelar morphs in the fossil record terms of changed dynamics of continuous serial development at the shoot apex. A computer simulation of vascular tissue patterning under hormone influence will be presented, and suggestions offered regarding the relative plausibility of alternate routes of evolutionary change between major groups.

Significance Understanding how development and evolution shape functional morphology is a basic question in biology. A paradigm of this is the finch’s beak that has adapted to different diets and behaviors over millions of years. We take a mathematical and physical perspective to quantify the nature of beak shape variations, how they emerge from changes to the development program of the birds, and their functional significance as a mechanical tool.

Modern Persian conjugation makes use of five periphrastic constructions. We contrast the properties of these five constructions and argue that they call for different analyses. We propose contrasting analyses relying on the combination of an HPSG approach to feature geometry and syntactic combination, and an approach to paradigm organization and morphological exponence based on Paradigm Function Morphology. This combination of analytic tools allows us to treat the whole array of periphrastic constructions as lexical in origin—no phrasal construction or multi-word lexical entry of any kind is required.

Multi-level evolution (MLE) is a novel robotic design paradigm which decomposes the design problem into layered sub-tasks that involve concurrent search for appropriate materials, component geometry and overall morphology. This has a number of advantages, mainly in terms of quality and scalability. In this paper, we present a hierarchical approach to robotic design based on the MLE architecture. The design problem involves finding a robotic design which can be used to perform a specific locomotion task. At the materials layer, we put together a simple collection of materials which are represented by combinations of mechanical properties such as friction and restitution. At the components layer we combine these materials with geometric design to form robot limbs. Finally, at the robot layer we introduce these evolved limbs into robotic body-plans and learn control policies to form complete robots. Quality-diversity algorithms at each level allow for the discovery of a wide variety of reusable elements. The results strongly support the initial claims for the benefits of MLE, allowing for the discovery of designs that would otherwise be difficult to achieve with conventional design paradigms.

This thesis takes as its starting point proposals to model inflectional paradigms as geometrical structures, wherein systematic homonymies are constrained to occupy contiguous regions. It defines a precise criterion for assessing systematicity and shows, for a range of largely Indo-European and Afro-Asiatic data, that such models are observationally adequate in modelling systematic homonymies within a single inflectional dimension, and to a lesser extent, between different inflectional dimensions. This is taken to indicate that widely assumed characterizations of inflectional categories in terms of cross-classifying binary features are incorrect, inasmuch as such characterizations fail to predict the linearizability of natural classes of properties belonging to those categories. The same inadequacy besets attempts to account for systematic homonymies by means of rules that convert or 'refer' one morpho-syntactic representation to another. Rather it is argued that the linearizability of natural classes of properties suggests that inflectional categories are structured as a sub-classification of those properties, but that a phenomenon of 're-marking' serves to define, under strict constraints, additional natural classes beyond those defined by the sub-classification itself. The specific sub- classifications indicated by observed patterns of homonymy are language-specific. In addition, the properties so sub-classified under a single node may in certain cases be drawn from separate morpho-syntactic categories. This is taken to indicate that the terminal nodes of a morphological sub-classification are not morpho-syntactic feature complexes but purely morphological functions performing a discontinuous mapping between morpho-syntactic and morpho-phonological representations. The systematicity of homonymy patterns, then, is shown to be evidence for a linguistic level of 'pure morphology'.

This thesis takes as its starting point proposals to model inflectional paradigms as geometrical structures, wherein systematic homonymies are constrained to occupy contiguous regions. It defines a precise criterion for assessing systematicity and shows, for a range of largely Indo-European and Afro-Asiatic data, that such models are observationally adequate in modelling systematic homonymies within a single inflectional dimension, and to a lesser extent, between different inflectional dimensions. This is taken to indicate that widely assumed characterizations of inflectional categories in terms of cross-classifying binary features are incorrect, inasmuch as such characterizations fail to predict the linearizability of natural classes of properties belonging to those categories. The same inadequacy besets attempts to account for systematic homonymies by means of rules that convert or 'refer' one morpho-syntactic representation to another. Rather it is argued that the linearizability of natural classes of properties suggests that inflectional categories are structured as a sub-classification of those properties, but that a phenomenon of 're-marking' serves to define, under strict constraints, additional natural classes beyond those defined by the sub-classification itself. The specific sub- classifications indicated by observed patterns of homonymy are language-specific. In addition, the properties so sub-classified under a single node may in certain cases be drawn from separate morpho-syntactic categories. This is taken to indicate that the terminal nodes of a morphological sub-classification are not morpho-syntactic feature complexes but purely morphological functions performing a discontinuous mapping between morpho-syntactic and morpho-phonological representations. The systematicity of homonymy patterns, then, is shown to be evidence for a linguistic level of 'pure morphology'.