Search results for "GEOM"
showing 10 items of 6506 documents
Justification of point electrode models in electrical impedance tomography
2011
The most accurate model for real-life electrical impedance tomography is the complete electrode model, which takes into account electrode shapes and (usually unknown) contact impedances at electrode-object interfaces. When the electrodes are small, however, it is tempting to formally replace them by point sources. This simplifies the model considerably and completely eliminates the effect of contact impedance. In this work we rigorously justify such a point electrode model for the important case of having difference measurements ("relative data") as data for the reconstruction problem. We do this by deriving the asymptotic limit of the complete model for vanishing electrode size. This is s…
Exercising exclusions: Space, visibility, and monitoring of the exercising fat female body
2019
The author’s aim is to inspect the position of the fat (female) body in the field of exercise. Specifically, the author is interested in fat women’s experiences of their treatment while exercising in public, and argues that, in particular, public spaces for exercise, such as gyms and swimming pools, are currently discursively and concretely constructed as “exclusive” spaces for the normative bodied. Bodies that are deemed non-normative, such as fat bodies, are often made either invisible or intolerable in the discourse of physical activity and exercise. Consequently, public spaces for exercise such as gyms or swimming pools are seen as out of bounds for non-normative bodies and this is refl…
Jäykät liikkeet ja Sivu-Kulma-Sivu -sääntö
2016
Venla Haapala, Jäykät liikkeet ja SKS -sääntö (engl. Rigid motions and SAS), matematiikan pro gradu -tutkielma, 57 s., Jyväskylän yliopisto, Matematiikan ja tilastotieteen laitos, kesä 2016. Tämän tutkielman tarkoituksena on selventää euklidisen tasogeometrian ja analyyttisen eli karteesisen geometrian välistä yhteyttä jäykkien liikkeiden tutkimisen kautta. Lisäksi tutkielman tarkoituksena on osoittaa, että jäykkien liikkeiden olemassaolo (ERM) on yhtäpitävä yhtenevyysaksiooman Sivu-Kulma-Sivu (SKS) kanssa, kun muut Hilbertin aksioomat ovat voimassa. Tutkielmassa lähdetään algebrallisista lähtökohdista rakentamaan geometrista mallia, jossa geometriset käsitteet määritetään kunnan ominaisuuk…
Il sistema di copertura del Teatro Politeama di Palermo
2012
In the project of the Politeama’s Theater in Palermo, the Architect Almeyda summarizes, in an expressive and model balance, the technological component and geometrical/spatial shape, providing optimal solutions to a structural and functional problems. Thanks to its typological approach, thanks to its technological aspects and, specifically, thanks to its size and its style, the work offers us some interesting reflections about the technical choices carried out for the construction. The Author, basing on some original Almeyda’s drawings, deepens the geometric and compositional system of the roof. The daring and complex construction carried out in iron and glass, modern and progressive in for…
N-[3-Methyl-1-phenyl-1-(1H-tetrazol-1-yl)butan-2-yl]acetamide
2016
In the molecule of the title compound, C14H19N5O, the dihedral angle formed between the tetrazole and phenyl rings is 68.39 (4)°. In the crystal, molecules are linked by N—H...N, C—H...N and C—H...O hydrogen bonds to form two-dimensional networks extending parallel to thebcplane.
Crystal structure and Hirshfeld surface analysis of (Z)-4-chloro-N′-(4-oxothiazolidin-2-ylidene)benzenesulfonohydrazide monohydrate
2018
The asymmetric unit of the title thiazole derivative containing a sulfonylhydrazinic moiety, C9H8ClN3O3S2·H2O, consists of two independent molecules and two water molecules. The central parts of the molecules are twisted as both the molecules are bent at both the S and N atoms. In the crystal, N—H...N, N—H...O, C—H...O and O—H...O hydrogen-bonding interactions connect the molecules, forming layers parallel to the ab plane. Two-dimensional fingerprint plots associated with the Hirshfeld surface show that the largest contributions to the crystal packing come from O...H/H...O (32.9%) and H...H (22.6%) interactions.
(no title)
2017
Biological invasions are recognized as a significant evolutionary factor over short time scales. In particular, their effect is well recorded on the genetic structure of populations, the patterns of phenotypic evolution and the richness of parasite fauna associated to invasive populations. This study aims at quantifying the consequences of a biological invasion according to these three levels (genetical, phenotypical and parasitological) taking as example the Mozambique tilapia Oreochromis mossambicus. This African cichlid is characterized by an unusual conservation status since it is both (i) ranked among the world's worst invasive species due to its global dispersion during the 20th centu…
A survey on algebraic dilatations
2023
In this text, we wish to provide the reader with a short guide to recent works on the theory of dilatations in Commutative Algebra and Algebraic Geometry. These works fall naturally into two categories: one emphasises foundational and theoretical aspects and the other applications to existing theories.
Geometrical-mechanical artefacts mediating tangent meaning: the Tangentograph
2012
This work deals with the didactical use of geometrical-mechanical artefacts to acquire tangent concept in vygotskian perspective. We adopt Rabardel’s theory on instru-mental approach to distinguish artefacts and instruments specially to evince the history-to-education ontogenesis-phylogenesis process. From this point of view we trace a historical-epistemological pathway for the tangent up to set an ad hoc didactical counterpart. Specifically in this paper we deepen the kinematical properties of the tangent (introducing the XVII century so called tractional motion) designing a laboratorial didactic pathway for 12th grade students with the use of a particular geometrical-mechanical artefact f…
Coach-athlete perceived congruence between actual and desired emotions in karate competition and training
2017
Coaches can help athletes regulate emotions but would benefit from tools that help them accurately perceive athletes' emotions. In the present study, we investigated the use of video-recorded performances to compare 3 martial artists' ratings of desired and actual emotions with their coach's ratings. Results show how desired emotions progressively fluctuated throughout competition. Furthermore, desired and actual emotions differed between training and performance contexts. Finally, we report correlations between performance and perceived congruence in desired and actual emotions. Cumulatively, results offer support for the video-assisted recall of emotions as an intervention tool in develop…