Relevant bibliographies by topics / Line congruences

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Line congruences'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Line congruences"

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Izumiya, Shyuichi, Kentaro Saji, and Nobuko Takeuchi. "Singularities of line congruences." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 133, no. 6 (December 2003): 1341–59. http://dx.doi.org/10.1017/s0308210500002973.

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A line congruence is a two-parameter family of lines in R3. In this paper we study singularities of line congruences. We show that generic singularities of general line congruences are the same as those of stable mappings between three-dimensional manifolds. Moreover, we also study singularities of normal congruences and equiaffine normal congruences from the viewpoint of the theory of Lagrangian singularities.
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TAŞ, Ferhat, and Osman GÜRSOY. "On the Line Congruences." International Electronic Journal of Geometry 11, no. 2 (November 30, 2018): 47–53. http://dx.doi.org/10.36890/iejg.545123.

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Arrondo, Enrique. "Line Congruences of Low Order." Milan Journal of Mathematics 70, no. 1 (September 1, 2002): 223–43. http://dx.doi.org/10.1007/s00032-002-0008-4.

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Larochelle, Pierre M., Judy M. Vance, and John N. Kihonge. "Interactive Visualization of Line Congruences for Spatial Mechanism Design." Journal of Computing and Information Science in Engineering 2, no. 3 (September 1, 2002): 208–15. http://dx.doi.org/10.1115/1.1529211.

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This paper presents a framework for generating, representing, and interacting with the line congruences associated with four general finite poses. These line congruences are the solution space of spatial 4C mechanisms which will guide a moving body through the four prescribed poses. Hence, the contributions of this paper are applicable to developing interactive tools for designing spatial 4C mechanisms for four pose motion generation. Moreover, the strategies employed to address this difficult interactive visualization challenge are presented. The goal here being to facilitate future works which address other interactive visualization challenges. First, a methodology for generating a parameterized representation of the line congruences is reviewed. This is followed by strategies for visually representing the line congruences which are appropriate for both workstation and immersive virtual reality computer graphics. Next, strategies and supporting algorithms for interacting with the line congruences to obtain solution mechanisms with fixed links or coupler links in desired regions of the workspace are presented. The result is an intuitive interactive visual design methodology for generating and interacting with the line congruences associated with four general finite spatial poses for spatial 4C mechanism design. It is our desire that this effort, albeit focused upon the challenge of creating computer-aided design environments for spatial 4C mechanisms, will facilitate as well as motivate other efforts to address the inherent visualization and interaction challenges in designing three dimensional mechanical systems.
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Wang, J., C. Jiang, P. Bompas, J. Wallner, and H. Pottmann. "Discrete Line Congruences for Shading and Lighting." Computer Graphics Forum 32, no. 5 (August 2013): 53–62. http://dx.doi.org/10.1111/cgf.12172.

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Frigerio, Emma, and Cristina Turrini. "On order-two line congruences in ? n." Archiv der Mathematik 55, no. 4 (October 1990): 412–16. http://dx.doi.org/10.1007/bf01198483.

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Кокарева, Я., and Ya Kokareva. "Synthesis of Equations For Ruled Surfaces With Two Curvilinear And One Rectangular Directrixes." Geometry & Graphics 6, no. 3 (November 14, 2018): 3–12. http://dx.doi.org/10.12737/article_5bc454948a7d90.80979486.

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Ruled surfaces have long been known and are widely used in construction, architecture, design and engineering. And if from the technical point of view the developable surfaces are more attractive, then architecture and design successfully experiment with non-developable ones. In this paper are considered non-developable ruled surfaces with three generators, two of which are curvilinear ones. According to classification, such surfaces are called twice oblique cylindroids. In this paper has been proposed an approach for obtaining of twice oblique cylindroids by immersing a curve in a line congruence of hyperbolic type. Real directrixes of such congruence are a straight line and a curve. It has been proposed to use helical lines (cylindrical and conical ones) as a curvilinear directrix, and a helical line’s axis as the straight one. Then the congruence’s rectilinear ray will simultaneously intersect the helical line and its axis. Congruence parameters are the line’s pitch and the guide cylinder or cone’s radius. The choice of the curvilinear directrix is justified by the fact that the helical lines have found a wide application in engineering and architecture. Accordingly, the helical lines based surfaces can have a great potential. In this paper have been presented parametric equations of the considered congruences. The congruence equations have been considered from the point of view related to introducing a new curvilinear coordinate system. The obtained system’s coordinate surfaces and coordinate lines have been also studied in the paper. To extract the surface, it is necessary to immerse the curve in the congruence. To synthesize the equations has been used a constructive-parametric method based on the substitution of the immersed line’s parametric equations in the congruence equations according to a special algorithm. In the paper have been presented 5 examples for the synthesis of ruled surfaces equations such as the twice oblique cylindroid and their visualization. The method is universal and algorithmic, and therefore easily adaptable for the automated construction of surfaces with variable parameters of both the congruence and the immersed line.
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Özyilmaz, Emin, Yusuf Yayli, and Bahandir Tantay. "On Time-Like Line Congruences and Dual Spherical Areas on Lorentzian Spheres." Mathematical Proceedings of the Royal Irish Academy 103, no. 1 (January 1, 2003): 9–21. http://dx.doi.org/10.3318/pria.2003.103.1.9.

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Shepherd, Mary D. "Line congruences as surfaces in the space of lines." Differential Geometry and its Applications 10, no. 1 (January 1999): 1–26. http://dx.doi.org/10.1016/s0926-2245(98)00025-4.

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Areces, C., M. Campercholi, D. Penazzi, and P. Sánchez Terraf. "The lattice of congruences of a finite line frame." Journal of Logic and Computation 27, no. 8 (August 3, 2017): 2653–88. http://dx.doi.org/10.1093/logcom/exx026.

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Dissertations / Theses on the topic "Line congruences"

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Hamann, Marco. "Zur Differentialgeometrie zweiparametriger Geradenmengen im KLEINschen Modell." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1111593005151-37742.

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In der vorliegenden Arbeit werden Geradenkongruenzen des projektiv abgeschlossenen dreidimensionalen euklidischen Raumes differentialgeometrisch untersucht. Nach J. PLÜCKER lassen sich Geraden in gleicher Weise als Grundelemente eines Geradenraumes auffassen wie die Punkte in einem Punktraum. Unter Beachtung dieser Überlegung scheint eine "natürliche" Behandlung der Geradenkongruenzen interessant und sinnvoll. Sie bildet den Gegenstand der vorliegenden Dissertation. Ein besonderes Augenmerk richtet sich dabei auf die Frage nach "kleinsten" Geradenkongruenzen ("Minimalkongruenzen") in der Geradenmenge des reellen projektiv abgeschlossenen dreidimensionalen euklidischen Raumes. Dahinter verbirgt sich eine gewisse Analogiebildung in der Liniengeometrie, die der klassischen Differentialgeometrie entstammt. Die Geradenkongruenzen bilden hierbei das liniengeometrische Analogon zu den Flächen des dreidimensionalen (Punkt-)Raumes. Das Wort "Kleinste" stellt im Geradenraum einen Bezug zu den Minimalflächen in der Differentialgeometrie her. Nun gestatten diese Fragestellungen in der Liniengeometrie eine anschauliche Interpretation, sobald man ein Punktmodell des Geradenraumes vorliegen hat. Einparametrige Geradenmannigfaltigkeiten (Regelflächen) lassen sich darin als Kurven und Geradenkongruenzen als zweidimensionale Flächen auffassen. Die vierparametrige Geradenmenge des reellen projektiven dreidimensionalen Raumes ist in diesem Modell eine Quadrik vom Index 2 in einem reellen projektiven fünfdimensionalen Raum, die so genannte KLEINsche Hyperquadrik. Der Modellwechsel wird durch die KLEINsche Abbildung vollzogen
In the available work line congruences of the projectively extended three-dimensional euclidean space will be analysed. Following to J. PLÜCKER lines can be seen as basic elements of an line space like in the same way points in a point-space. Taking this fact in consideration a "natural" handling with line congruences might be interesting and reasonable. A special detail in the thesis is the question to minimal congruences in the set of lines of the projectively extended euclidean three-space. It can also be seen as an analogous problem in the geometry of lines which can be find in the differential geometry of surfaces. In this case the line congruences are similar to the surfaces of the three-dimensional (point-)space. The phrase "minimal" means in the line space the connection to the minimal surfaces in the differential geometry. These questions offer in line geometry demonstrative interpretation possibilities if a point-model in the line space exists. One-parameter manifolds of lines (rule surfaces) can be seen in this ambiance as curves and line congruences as two dimensional surfaces. The four-parametric set of lines in the projectively extended three-dimensional euclidian space is in this model a quadric of the index 2 in a real projective five-dimensional space, the so called KLEIN-quadric. The changing of the model is managed by the KLEIN-mapping
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Hamann, Marco. "Zur Differentialgeometrie zweiparametriger Geradenmengen im KLEINschen Modell." Doctoral thesis, [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974391425.

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Racat, Margot. "L’influence de la stimulation tactile lors de l’évaluation en ligne du produit." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE3064.

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Ce travail de recherche doctorale étudie l’influence de la stimulation tactile de l’interface lors de l’évaluation en ligne du produit. A travers un plan d’expériences composé d’une étude exploratoire au design de recherche mixte et de trois expérimentations, nous cherchons à identifier, dans un premier temps, l’effet de l’absence d’interaction directe avec le produit (étude exploratoire) puis nous testons l’effet du type de test de produits sur la préférence d’achat du consommateur (i.e. physique vs. virtuel) (étude 1). Dans un deuxième temps, nous étudions l’effet de la stimulation tactile directe de l’interface sur la perception de similarité du test et l’influence de cette dernière sur l’évaluation du produit. En particulier, nous testons deux effets: celui de la congruence entre la stimulation tactile de l’interface et la texture du produit (étude 2) puis celui de la familiarité des textures (étude 3). D’une part, nous montrons que le consommateur est à la recherche d’interaction sensorielle lors de son interaction virtuelle avec les produits, ce qui lui permet de considérer cette expérience virtuelle comme plus réaliste, notamment au niveau sensoriel (étude exploratoire). Nous montrons également que le consommateur préfère l’expérience virtuelle du produit malgré le manque significatif d’interactions sensorielles, notamment tactiles (étude 1). D’autre part, nous montrons que l’interaction des textures entre l’interface et le produit influence négativement la similarité perçue du test (étude 2) tandis que, lorsque les textures ne sont pas familières, l’interaction des textures influence positivement la similarité perçue (étude 3). A partir de ces résultats, nous concluons que le consommateur est à la recherche de stimulation tactile lors de son expérience virtuelle avec le produit afin de satisfaire son besoin de toucher et d’enrichir son expérience sensorielle en ligne. En particulier, l’effet positif de l’interaction des textures, lorsque la stimulation n’est pas familière, sur la similarité perçue du test suggère que les consommateurs considèrent l’information tactile comme suffisante pour percevoir une similarité sensorielle à celle obtenue en magasin
Our doctoral research examines the influence of tactile stimulation in online product evaluation. With an exploratory study and three experiments, we aim at identifying the effect of the absence of direct product touch (exploratory study), and then concentrate on the effect of the type of product testing on the consumer’s preference for purchasing (physical vs. virtual) (study 1). Next, we look at the influence of the interface tactile stimulation on the perceived product test similarity, of which the latter positively influences the online product evaluation. In particular, we test two types of effect: the congruence (study 2) and the familiarity of the textures (study 3). On the one hand, our results show that consumers are seeking a higher sensory input into online environments while interacting with products, especially from a tactile perspective (exploratory study). Results also highlight that consumers prefer the online product experience, even though they regret the absence of products' tactile sensations (study 1). On the other hand, we demonstrate that the interaction between the interface's direct tactile stimulation and the product's texture negatively influence the perceived similarity of product testing when textures fit, whereas when the textures are unfamiliar, the interaction of texture positively influences the perceived similarity of product testing. From these results, we conclude that consumers are in need of tactile input into virtual product experiences to satisfy their need for touch, and enhance their online sensory experiences. Notably, the positive effect of the interaction of textures, in an unfamiliar tactile stimulation, suggests that consumers consider the direct tactile stimulation as not being sufficient enough to provide useful information, but they assimilate it to a real product testing from a tactile perspective
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Smith, Ann K. "Grandparent life satisfaction as related to intergenerational congruence of the grandparent role /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487670346876534.

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O'Connor, Anne. "Fossils and the Tree of Life : ghost ranges, stratigraphic congruence and data quality." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636514.

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To investigate major evolutionary trends and the importance of fossil data we need to be confident that both phylogenetic trees and fossil dates are reliable. Indices of stratigraphic congruence provide a way to quantify the fit between the fossil record and phylogeny, but appear to be subject to a number of putative biases. I used both simulated data and a large sample of empirical trees to determine the effect of these biases on the most widely used indices of stratigraphic congruence to determine. The GER* (the modified gap excess ratio) was the least sensitive and therefore recommended for use. I found that stratigraphic congruence varied significantly across higher taxa (for example, arthropods were less stratigraphically congruent than tetrapods), and also throughout the Phanerozoic (the last 540 million years), closely following the taxonomic composition of my sample. I focussed on data quality and in particular taxon sampling, homoplasy and tree support to investigate general trends across taxonomic groups. A novel script was developed to automatically carry out continuous taxon jackknifing to investigate the effect of taxon sampling on the stability of phylogenetic trees. While this is a computationally intensive process, I found that measures of homoplasy and support (which are much easier to calculate) could serve as partial indicators of whether a tree was likely to be sensitive to taxon sampling. There was no major variation in taxon sampling trends across higher taxa. A modified version of this script was then used to look at particular cases of conflicting phylogenetic hypotheses to determine how easy it would be to get a data set to generate a constraint topology with only small changes to the taxon sample. In almost every case, it required maximal removal of taxa from the data set in order to match the constraint topology, indicating that there were very different phylogenetic signals in the different data sets. The extent of trends across taxonomic groups and through time is variable. Although stratigraphic congruence varies significantly between groups and throughout the Phanerozoic, measures of homoplasy and support do not appear to be taxon dependent. Taxon sampling is an important consideration when designing phylogenetic analyses: denser taxon sampling can have a positive influence on estimates of phylogenetic accuracy and perturbations of the taxon sample can result in radically different evolutionary relationships.
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Li, Blaise. "Fiabilité des clades et congruence taxinomiqueApplication à la phylogénie des téléostéens acanthomorphes." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2008. http://tel.archives-ouvertes.fr/tel-00331825.

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Si le but de la reconstruction phylogénétique est d'avoir une idée des relations de parenté réelles entre les êtres vivants, il est bon de ne pas se contenter d'un simple arbre obtenu par l'analyse combinée d'un ensemble de données. En effet, même des clades robustes apparaissant dans un tel arbre peuvent ne pas être fiables. La confiance dans une affirmation phylogénétique ne peut émerger qu'après une comparaison de résultats obtenus par des données indépendantes.
Dans un premier temps, la présente thèse propose de mesurer la fiabilité d'un clade à partir d'un indice de répétition prenant en compte le nombre d'occurrences obtenues pour ce clade sur un ensemble d'analyses de données indépendantes, c'est-à-dire peu susceptibles de donner lieu aux mêmes biais de reconstruction. Plus un clade est obtenu un nombre élevé de fois de cette façon, plus il peut être considéré comme fiable. Il est également tenu compte de la présence ou non de clades eux-mêmes répétés et incompatibles avec le clade d'intérêt. Plus un clade est contredit par un clade possédant un grand nombre d'occurrences, moins il doit être considéré comme fiable.
Dans une deuxième partie, l'indice de répétition est calculé à partir d'une série d'analyses mettant en jeu environ 200 taxons et basées sur quatre marqueurs nucléaires: Rhodopsine, MLL4, IRBP et RNF213 (ce dernier étant utilisé ici pour la première fois). Ces marqueurs sont analysés suivant des méthodes probabilistes, séparément et en combinaisons de 2, 3 ou 4, ce qui permet de bénéficier des avantages de l'analyse combinée tout en ayant des séries de résultats indépendants à comparer.
Les résultats de l'analyse de fiabilité sont ensuite synthétisés sous forme d'arbres incluant en priorité les clades les plus fiables, suivant des méthodes gérant de plusieurs façons les différences d'échantillonnages taxinomiques entre les jeux de données.
Les arbres de synthèse obtenus permettent de préciser la structure de la phylogénie des téléostéens acanthomorphes (Actinopterygii : Teleostei). De nouveaux clades fiables sont identifiés à plusieurs niveaux de résolution, et de nouveaux taxons sont placés dans la phylogénie des téléostéens acanthomorphes.
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Hedges-Muncy, Ariana M. "Effect of Schematic Congruence on Mnemonic Discrimination in the Hippocampal Subregions." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/8995.

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Two experiments are presented in this dissertation to investigate the effect a schema may have on mnemonic discrimination. We developed stimuli composed of a foreground item on a background that was either schematically congruent or incongruent. For the encoding phase of both experiments, these stimuli were presented to 98 participants, who were tasked with determining the congruency of each foreground-background pair. Next, the two experiments diverged for the retrieval phase, where participants were presented with either the same object as before (Target) or one that was similar (Lure). Forty-six participants in Experiment 1 saw stimuli with the same background as initially presented during the retrieval phase. For Experiment 2, fifty-two participants saw the foreground item presented only on a white background. Behavioral, eye tracking, and whole-brain, high-resolution fMRI data were acquired for both experiments and both phases of the task. We found memory discriminability (d-prime) scores were larger for incongruent stimuli when target-lure pairs were less similar and only when the background was present during retrieval. Critically, we found evidence of recognition in the hippocampal subregions as opposed to lure detection. These findings support the notion of a congruency benefit due to the "generate-and-recognize" model and an incongruency benefit due to increased initial attention.
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Richter, Goetz. "Silent harmony and hidden contemplation arguments for the congruence of philosophy and music /." Connect to full text, 2006. http://hdl.handle.net/2123/2062.

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Thesis (Ph. D.)--University of Sydney, 2007.
Title from title screen (viewed 28 March 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the Dept. of Philosophy, Faculty of Arts. Degree awarded 2007; thesis submitted 2006. Includes bibliographical references. Also available in print form.
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Eagan, Amy Elizabeth. "Person-environment congruence and gender and appraisal of hope, hassles, uplifts, life events and hardiness /." Connect to resource, 1994. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1248711307.

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Eagan, Amy Elizabeth. "Person-enviornment congruence and gender and appraisal of hope, hassles, uplifts, life events and hardiness." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1248711307.

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Books on the topic "Line congruences"

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Arrondo, Enrique. On congruences of lines in the projective space. Paris: Société mathématique de France, 1992.

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Jean, Wiley, ed. Embracing wholeness: Living in spiritual congruence. Fort Bragg, Calif: Cypress House, 2002.

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1932-, Bass Hyman, and Lam, T. Y. (Tsit-Yuen), 1942-, eds. Algebra. Providence, R.I: American Mathematical Society, 2010.

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Alladi, Krishnaswami, Frank Garvan, and Ae Ja Yee. Ramanujan 125: International conference to commemorate the 125th anniversary of Ramanujan's birth, Ramanujan 125, November 5--7, 2012, University of Florida, Gainesville, Florida. Providence, Rhode Island: American Mathematical Society, 2014.

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Koganzon, Rita. Liberal States, Authoritarian Families. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197568804.001.0001.

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How can liberals justify adult authority over children? Children are born requiring both subordination to adults and education to equip them for citizenship. These requirements are especially vexing for liberal democracies, for whom the exercise of authority is at odds with the natural liberty and equality of citizens. This difficulty has led some liberal theorists to appeal to the liberal state as a model for familial relations and reject parental authority. My book shows that this effort is misguided, and that early liberals understood parental authority as a necessary protection for children’s own future liberty. It was early modern absolutist theorists—Bodin, Filmer, and Hobbes—who sought congruence between the family and the state, arguing that absolute paternal authority was a salutary education for absolutism’s subjects. But early liberals like Locke and Rousseau opposed congruence. Even as they sought to restrict public authority and limit the formal power of parents, they nonetheless sought to strengthen their private authority over children. They saw that undermining traditional authorities would not issue straightforwardly in freedom but would instead elevate the authority of public opinion to new heights and subject citizens to a new tyranny of opinion. To counteract this threat, they buttressed the pedagogical authority of the family to protect children’s future intellectual liberty and defend liberal citizenship. Their educational writings reveal an important corrective insight for modern liberalism: authority is not only not the enemy of liberty, but actually a necessary prerequisite for it.
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Leifeld, Philip. Discourse Network Analysis. Edited by Jennifer Nicoll Victor, Alexander H. Montgomery, and Mark Lubell. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780190228217.013.25.

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Political discourse is the verbal interaction among political actors, who make normative claims about policies conditional on each other, rendering discourse a dynamic network phenomenon. The structure and dynamics of policy debates can be analyzed by combining content and dynamic network analysis. After annotating statements of actors in text sources, networks can be created from these structured data, such as congruence or conflict networks at the actor or concept level, affiliation networks of actors and concept stances, and longitudinal versions of these networks. The resulting network data reveal important properties, such as the structure of advocacy coalitions or discourse coalitions; polarization and consensus formation; and underlying endogenous processes like popularity, reciprocity, or social balance. The advantage of discourse network analysis over survey-based policy network research is that policy processes can be analyzed from a longitudinal perspective. Inferential techniques for understanding the micro-level processes governing political discourse are being developed.
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Tzelgov, Joseph, Dana Ganor-Stern, Arava Kallai, and Michal Pinhas. Primitives and Non-primitives of Numerical Representations. Edited by Roi Cohen Kadosh and Ann Dowker. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199642342.013.019.

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Primitives of numerical representation are numbers holistically represented on the mental number line (MNL). Non-primitives are numbers generated from primitives in order to perform specific tasks. Primitives can be automatically retrieved from long-term memory (LTM). Using the size congruency effect in physical comparisons as a marker of automatic retrieval, and its modulation by intrapair numerical distance as an indication of alignment along the MNL, we identify single-digits, but not two-digit numbers, as primitives. By the same criteria, zero is a primitive, but negative numbers are not primitives, which makes zero the smallest numerical primitive. Due to their unique notational structure, fractions are automatically perceived as smaller than 1. While some specific, familiar unit fractions may be primitives, this can be shown only when component bias is eliminated by training participants to denote fractions by unfamiliar figures.
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Book chapters on the topic "Line congruences"

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Pottmann, Helmut, and Johannes Wallner. "Line Congruences and Line Complexes." In Mathematics and Visualization, 423–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-04018-4_7.

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Čech, Eduard. "Developable Transformations of Line Congruences." In The Mathematical Legacy of Eduard Čech, 393–415. Basel: Birkhäuser Basel, 1993. http://dx.doi.org/10.1007/978-3-0348-7524-0_26.

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Jüttler, Bert, and Katharina Rittenschober. "Using Line Congruences for Parameterizing Special Algebraic Surfaces." In Lecture Notes in Computer Science, 223–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-39422-8_16.

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Ge, Q. J., and B. Ravani. "Geometric Design of Rational Bézier Line Congruences and Ruled Surfaces Using Line Geometry." In Geometric Modelling, 101–20. Vienna: Springer Vienna, 1998. http://dx.doi.org/10.1007/978-3-7091-6444-0_9.

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Hogan, Peter A., and Dirk Puetzfeld. "Congruences of World Lines." In Frontiers in General Relativity, 1–18. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69370-1_1.

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Pasmore, William. "David Nadler: A Life of Congruence." In The Palgrave Handbook of Organizational Change Thinkers, 933–49. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52878-6_50.

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Pasmore, William. "David Nadler: A Life of Congruence." In The Palgrave Handbook of Organizational Change Thinkers, 1–17. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-49820-1_50-1.

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Pasmore, William. "Nadler, David: A Life of Congruence." In The Palgrave Handbook of Organizational Change Thinkers, 1–17. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-49820-1_50-2.

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Pasmore, William A. "Nadler, David: A Life of Congruence." In The Palgrave Handbook of Organizational Change Thinkers, 1155–71. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-38324-4_50.

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Brown, Shanique G. U., Alice F. Stuhlmacher, and Mary M. Keegin. "Job Role Congruence and Gender." In Encyclopedia of Quality of Life and Well-Being Research, 3448–51. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-0753-5_4089.

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Conference papers on the topic "Line congruences"

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Larochelle, Pierre M. "On the Design of Spatial 4C Mechanisms for Rigid-Body Guidance Through 4 Positions." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0108.

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Abstract This paper presents a procedure for determining the fixed and moving congruences associated with four finitely separated spatial positions. Furthermore, a methodology is derived for selecting the lines from the congruences which define the joint axes of a 4C mechanism. The result is a design procedure for performing the kinematic dimensional synthesis of spatial 4C mechanisms for four position rigid body guidance. Associated with four finitely separated positions in space are a fixed and a moving congruence. These congruences are a two dimensional set of lines, where each line defines the axis of a cylindrical joint that guides a body through the four prescribed positions. In order to uniquely determine a 4C mechanism from the congruences four free parameters must be specified. We present procedures for determining these free design parameters which result in mechanisms with joint axes that are nearest to some desired location. Moreover, included is a detailed numerical example illustrating the design process.
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Дворецкий, Александр, Aleksandr Dvoreckiy, Татьяна Денисова, and Tat'yana Denisova. "Quasifocal Lines." In 29th International Conference on Computer Graphics, Image Processing and Computer Vision, Visualization Systems and the Virtual Environment GraphiCon'2019. Bryansk State Technical University, 2019. http://dx.doi.org/10.30987/graphicon-2019-1-181-184.

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The article proved that the highest concentration of reflected rays from the surface of the reflector is located along the quasifocal line. The quasifocal line belongs to the caustic surface of the congruence of reflected rays. The parameters of the shape and position of the quasifocal lines are described by equations. Computer visualization of reflecting surfaces, congruences of reflected rays and their caustics, quasifocal lines and maps of isolines of local concentrations on the surface of the receiver of reflected rays are presented.
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Ravani, B., and J. W. Wang. "Computer Aided Geometric Design of Line Constructs." In ASME 1990 Design Technical Conferences. American Society of Mechanical Engineers, 1990. http://dx.doi.org/10.1115/detc1990-0030.

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Abstract This paper develops a mathematical foundation for Computer Aided Design (CAD) of sculptured shapes based on line geometry. First, a new representation is presented for a line based on Plücker coordinates that would allow specification of a line segment (rather than an infinite line) in an elegant manner and suitable for computational purposes. Then, methods are presented for geometric design of shape patches (here referred to as line constructs) by interpolating or approximating a set of control lines (rather than control points) using ruled surfaces, line congruences and line complexes. The methods presented are general and allow utilization of different basis functions such as Bézier, Cardinal and B-spline bases. As Computer Aided Manufacturing (CAM) application of the theory, methods are developed for generation of offsets of ruled surfaces useful in Numerical Control (NC) milling and tool motion generation in the Wire Cut Electric Discharge Machining (EDM) operation.
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Huang, Chintien, and Tzu-Cheng Hsing. "A Line Geometric Foundation for Finite Screw Systems Associated With Spatial Linkages." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48115.

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This paper investigates the line varieties corresponding to finite screw systems associated with spatial linkages. This research is based on the correspondence between a screw and a linear complex, and a screw system corresponds to the intersection of the linear complexes. In finite kinematics, two screw systems associated with the finite motions of the revolute-revolute (R-R) and prismatic-revolute (P-R) open chains have been discovered. These two screw systems also led to the discovery of the screw systems associated with the finite motions of the spatial 4R, spatial RPRP, and other overconstrained linkages. By using the intersection operation of linear complexes, this paper finds the linear reguli corresponding to the finite motions of R-R and P-R chains. Then we utilize the sum operation of the linear reguli corresponding to the R-R and P-R chains to obtain the hyperbolic linear congruences corresponding to the finite motions of the spatial 4R and RPRP linkages. The result presented here serves as a line geometric foundation for finite screw systems associated with spatial linkages. In addition, with CAD drawings, this paper enables the visualization of the obtained line varieties and their operations.
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Kmet’ová, Mária, Tibor Kmet’, Theodore E. Simos, George Psihoyios, and Ch Tsitouras. "Line Geometry in CAGD Ruled Surfaces and Topological Properties of Related Line Congruencies." In NUMERICAL ANALYSIS AND APPLIED MATHEMATICS: International Conference on Numerical Analysis and Applied Mathematics 2009: Volume 1 and Volume 2. AIP, 2009. http://dx.doi.org/10.1063/1.3241432.

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CHILLAG, DAVID. "On Blichfeldt's like congruences and other close characters - conjugacy classes analogs." In Proceedings of the Conference. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789814277808_0003.

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Brito, Ana Beatriz Sanches, Patricia Targon Campana, Tiago Mauricio Francoy, and José Roberto Tozoni. "UTILIZAÇÃO DE TÉCNICAS ESPECTROSCÓPICAS NO ESTUDO DE NANOCOMPÓSITOS À BASE DE PRÓPOLIS DE ABELHA SEM FERRÃO E NANOARGILA PARA O DESENVOLVIMENTO DE NANOMATERIAIS AVANÇADOS." In I Congresso Brasileiro de Biotecnologia On-line. Revista Multidisciplinar de Educação e Meio Ambiente, 2021. http://dx.doi.org/10.51189/rema/1101.

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Introdução: Na literatura, há evidências de que a própolis produzida por abelhas nativas sem ferrão apresenta uma notável concentração de cumarinas e flavonóides, que apresentam ações imunomoduladoras que as permitem atuar sobre inflamações e infecções. Devido a estas atividades, podemos desenvolver um nanocompósito a partir de própolis e de nanoargilas, que são silicatos com uma estrutura tubular, onde substâncias podem ser inseridas e liberadas de forma controlada. Tendo isso em vista, estudamos as cumarinas e flavonóides presentes na própolis da abelha nativa Melipona quadrifasciata quadrifasciata (Mqq) em estado sólido e em solução, e conjugada com nanoargila haloisita (HNT) para desenvolvimento de nanomateriais avançados, realizando a variação do pH dos compósitos. Materiais e Métodos: A extração da própolis em foi feita em etanol 70% e a conjugação foi realizada com 1 ml de extrato etanólico de própolis (EEP) para 10 mg de nanoargila (NTH) e, após descanso, houve lavagem, e reservou-se o conjugado (EEP-NTH). As técnicas espectroscópicas utilizadas foram as espectroscopias de fluorescência e de reflectância por esfera integradora. Resultados Parciais: O EEP-NTH passou por varredura na esfera integradora nos comprimentos de 700 nm a 200 nm, e mostrou bandas nas regiões de 300 e 400 nm. Os espectros de fluorescência do EEP para flavonóides foram emitidos em 427, 468 e 487 e 525 nm. Já os espectros de fluorescência para cumarinas foram emitidos em 420, 468, 490 e 510 nm. Conclusão: As bandas de absorção do conjugado mostraram-se congruentes com os dados da literatura, indicando ligação da própolis na nanoargila. Os espectros de emissão para flavonóides não são citados na literatura e, das emissões para cumarinas, apenas 420 e 468 nm são confirmadas. Serão necessárias novas análises para estudar os comprimentos de onda que foram encontrados, e novos experimentos para realizar a variação do ambiente físico-químico para resultados finais.
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KASSANDROV, VLADIMIR V., and VLADIMIR N. TRISHIN. "GAUGE FIELDS AND PARTICLE-LIKE FORMATIONS ASSOCIATED WITH SHEAR-FREE NULL CONGRUENCES." In Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF). World Scientific Publishing Company, 2006. http://dx.doi.org/10.1142/9789812704030_0239.

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Gad, Emad, and Michel Nakhla. "Model order reduction of nonuniform transmission lines using integrated congruence transform." In the 40th conference. New York, New York, USA: ACM Press, 2003. http://dx.doi.org/10.1145/775832.775893.

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Ding, Weili, Xiaoli Li, and Wenfeng Wang. "Robust Image Corner Detection Using Local Line Detector and Phase Congruency Model." In 2010 WASE International Conference on Information Engineering (ICIE 2010). IEEE, 2010. http://dx.doi.org/10.1109/icie.2010.45.

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