Search results for "angle"
showing 10 items of 1921 documents
Podręcznik do nauki śpiewu Gesanglehre Bernharda Kothego (1821–1897)
2020
Singing is recognized as the most primary form of human contact with music. This art is an important element of the development,education and upbringing of the young generation. Inviting a child to the world of music lies first with the parent and then with the teacher. The popularity of various types of textbooks, songbooks or guidebooks indicates a great interest in music education. Although singing cannot be learned from a book, such studies are a great help. The author of the textbook Gesanglehre guided the idea of introducing the child to the world of music and showing the right ways of making music. This position was developed by Bernhard Kothe in 1872, and later perfected it in subse…
Knowledge Management in the Project Life Cycle - Initial Research on Polish Smes
2014
Abstract Contemporary organizations run their activities in an environment, which might be defined as fully uncertain and turbulent. Due to variations that occur in the surrounding environment, an increased attention of management practitioners and theoreticians is paid to new management concepts frequently in an integrated version. The authors express a deep belief that consolidation of approaches to project management and knowledge management constitutes a response to challenge for modern organizations. Research into the issue was based on an attempt to determine significance of the knowledge management issue in a life of projects performed by Polish small and medium-sized enterprises (SM…
Les modalités linguistiques du commentaire sur internet comme prise de position ("stance-taking"): l'exemple des commentaires sur YouTube
2015
International audience; Sur Internet, le commentaire est par essence un lieu argumentatif. Réagir à un article, une vidéo, une image ou à n’importe quelle prise de parole, est l’occasion pour l’utilisateur du Web 2.0 de donner son opinion, de contredire, confirmer, infirmer, interpeller, dénoncer, c’est-à-dire dans tous les cas prendre position. En effet, comme l’écrivent David Barton et Carmen Lee dans Language Online : Investigating Digital Texts and Practices, commenter est un acte qui consiste à se positionner et positionner les autres, c’est-à-dire une véritable prise de position (« Commenting is an important act of positioning oneself and others, that is stance-taking », Barton et Lee…
Automorphisms of right-angled Artin groups
2012
The purpose of this thesis is to study the automorphisms of right-angled Artin groups. Given a finite simplicial graph $\Gamma$, the right-angled Artin group $G_\Gamma$ associated to $\Gamma$ is the group defined by the presentation whose generators are the vertices of $\Gamma$, and whose relators are commutators of pairs of adjacent vertices. The first chapter is intended as a general introduction to the theory of right-angled Artin groups and their automorphisms. In a second chapter, we prove that every subnormal subgroup of $p$-power index in a right-angled Artin group is conjugacy $p$-separable. As an application, we prove that every right-angled Artin group is conjugacy separable in th…
Scheduling under the network of temporo-spatial proximity relationships
2017
We discuss and introduce to the schedulingeld a novel, qualitative optimization model - scheduling under the network of temporo-spatial proximity relationships.We introduce a half perimeter proximity measure as an objective of scheduling.We present and evaluate an incremental Sequence Pair neighborhood evaluation algorithm, applicable to both scheduling and rectangle packing problems in VLSI industry. In this paper, we discuss and introduce to the scheduling field a novel optimization objective - half perimeter proximity measure in scheduling under the network of temporo-spatial proximity relationships. The presented approach enables to qualitatively express various reasons of scheduling ce…
2-(3,5-Dimethyl-1H-pyrazol-1-yl)-2-hydroxyimino-N0-[1-(pyridin-2-yl)ethylethylidene]
2012
In the title compound, C14H16N6O2, the dihedral angles formed by the mean plane of the acetohydrazide group [maximum deviation 0.0629 (12) A˚ ] with the pyrazole and pyridine rings are 81.62 (6) and 38.38 (4) respectively. In the crystal, molecules are connected by N—HO and O—HN hydrogen bonds into supramolecular chains extending parallel to the c-axis direction. peerReviewed
(E)-1-(Pyridin-4-yl)propan-1-one oxime
2016
The asymmetric unit of the title compound, C8H10N2O, contains two crystallographically independent molecules of slightly different conformation, which are linkedviaan intermolecular O—H...N hydrogen bond. The dihedral angle between the pyridine ring and the oxime plane of moleculeA[2.09 (19)°] is smaller than in moleculeB[16.50 (18)°].
Poly[[tetramethanolbis[4-oxo-3-(pyridin-4-yl)-1-(2,4,6-trichlorophenyl)-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-olato]disodium]–diethyl ether–metha…
2016
In the title compound, [Na2(C16H7Cl3N5O2)2(CH3OH)4]·C4H10O·2CH3OH, the central pyrazolo[3,4-d]pyrimidine system makes dihedral angles of 82.98 (7)° with the trichlorophenyl ring and 13.11 (15)° with the pyridine ring. The sodium ion has an octahedral environment, being coordinated by four methanol molecules and one O and one N atom of two different heterocyclic ring systems.
(E)-1-(Pyridin-4-yl)propan-1-one O-tosyl oxime
2017
The title compound, C15H16N2O3S, was obtained by the reaction of (E)-1-(pyridin-4-yl)propan-1-one oxime andpara-toluenesulfonic acid. The pyridine ring makes a dihedral angle of 54.70 (10)° with the benzene ring. In the crystal, molecules are linked by C—H...O hydrogen bonds, forming a chain along thec-axis direction.
3-(2,4-Difluorophenyl)-1-(pyridin-4-yl)benzo[4,5]imidazo[1,2-d][1,2,4]triazin-4(3H)-one
2016
In the title compound, C20H11F2N5O, the central 13-membered ring system (r.m.s. deviation = 0.028 Å) makes a dihedral angle of 53.13 (7)° with the difluorophenyl ring and 79.98 (7)° with the pyridine ring. The crystal packing features aromatic π–π interactions between the 13-membered rings [shortest distance between ring centroids = 3.5682 (8) Å].