On the definition of post-newtonian approximations

1992 ◽  
Vol 438 (1903) ◽  
pp. 341-360 ◽  
Keyword(s):  
General Relativity ◽  
Newtonian Limit ◽  
Minimal Set ◽  
Asymptotically Flat ◽  
Precise Formulation ◽  
The Third ◽  
Newtonian Approximation ◽  
Definition Of

A definition of post-newtonian approximations is presented where the whole formalism is derived from a minimal set of axioms. This establishes a link between the existing precise formulation of the newtonian limit of general relativity and the post-newtonian equations which are used in practical calculations. The breakdown of higher post-newtonian approximations is examined within this framework. It is shown that the choice of harmonic gauge leads to equations which do not admit asymptotically flat solutions at the second post-newtonian level if one starts with a generic newtonian solution. The most simple choice of gauge gives equations which are solvable at the 2PN level but which in general have no solutions in the case of the third post-newtonian approximation.

scholarly journals Angular velocity of rotation of extended bodies in general relativity

1996 ◽  
Vol 172 ◽  
pp. 309-320
Author(s):  
S.A. Klioner
Keyword(s):  
General Relativity ◽  
Angular Velocity ◽  
Rigid Body ◽  
Rotational Motion ◽  
The Body ◽  
Astronomical Observations ◽  
Newtonian Approximation ◽  
Accurate Definition ◽  
Principal Axes ◽  
Definition Of

We consider rotational motion of an arbitrarily composed and shaped, deformable weakly self-gravitating body being a member of a system of N arbitrarily composed and shaped, deformable weakly self-gravitating bodies in the post-Newtonian approximation of general relativity. Considering importance of the notion of angular velocity of the body (Earth, pulsar) for adequate modelling of modern astronomical observations, we are aimed at introducing a post-Newtonian-accurate definition of angular velocity. Not attempting to introduce a relativistic notion of rigid body (which is well known to be ill-defined even at the first post-Newtonian approximation) we consider bodies to be deformable and introduce the post-Newtonian generalizations of the Tisserand axes and the principal axes of inertia.

ABOUT THE PROBLEM OF CLASSIFICATION OF THE CONCEPTS OF INFORMATICS STUDIED AT SECONDARY SCHOOL

2018 ◽  
pp. 4-7
Author(s):  
S. I. Zenko
Keyword(s):  
Secondary School ◽  
Foreign Language ◽  
Computer Science ◽  
Parts Of Speech ◽  
The Third ◽  
The Cross ◽  
Definition Of

The article raises the problem of classification of the concepts of computer science and informatics studied at secondary school. The efficiency of creation of techniques of training of pupils in these concepts depends on its solution. The author proposes to consider classifications of the concepts of school informatics from four positions: on the cross-subject basis, the content lines of the educational subject "Informatics", the logical and structural interrelations and interactions of the studied concepts, the etymology of foreign-language and translated words in the definition of the concepts of informatics. As a result of the first classification general and special concepts are allocated; the second classification — inter-content and intra-content concepts; the third classification — stable (steady), expanding, key and auxiliary concepts; the fourth classification — concepts-nouns, conceptsverbs, concepts-adjectives and concepts — combinations of parts of speech.

(A review). BRAUN-BLANQUETIA. Recueil de travaux de geobotanique / review of geobotanical monographs. Vol. 46. Centenaire de la phytosociologie. CAMERINO, 2010. 423 p.

2011 ◽  
pp. 143-147
Author(s):  
L. G. Naumova ◽  
V. B. Martynenko ◽  
S. M. Yamalov
Keyword(s):  
Plant Association ◽  
Northern Asia ◽  
The Third ◽  
International Botanical ◽  
International Botanical Congress ◽  
History Of ◽  
Definition Of

Date of «birth» of phytosociology (phytocenology) is considered to be 1910, when at the third International Botanical Congress in Brussels adopted the definition of plant association in the wording Including Flaó and K. Schröter (Flahault, Schröter, 1910; Alexandrov, 1969). The centenary of this momentous event in the history of phytocenology devoted to the 46th edition of the Yearbook «Braun-Blanquetia», which began to emerge in 1984 in Camerino (Italy) and it has a task to publish large geobotanical works. During the years of the publication of the Yearbook on its pages were published twice work of the Russian scientists — «The steppes of Mongolia» (Z. V. Karamysheva, V. N. Khramtsov. Vol. 17. 1995), and «Classification of continental hemiboreal forests of Northern Asia» (N. B. Ermakov in collaboration with English colleagues and J. Dring, J. Rodwell. Vol. 28. 2000).

Characteristics of the Metaphorical Image in the Poetry of Al-Sharif Al-Radhi

2019 ◽  
Vol 16 (2) ◽  
Author(s):  
Al-KhaierAmer Abdul Kareem
Keyword(s):  
The Third ◽  
Definition Of

Abstract The research started with an introduction containing the statement of the problem. The study was divided into four parts: a preamble and three sections. The preamble involved a definition of the metaphorical image and its importance. The first section covered the sources of the metaphorical image, the second dealt with the types of the metaphorical image, and the third discussed the functions of metaphorical representation as well as the main tools that contributed to the construction and formation of the metaphorical image. Finally, the study ended with a conclusion comprising the most significant findings of this research. keyword: metaphorical image, AL-Sharif Al-Radi.

Ildar Garipzanov, Caroline Goodson, and Henry Maguire, ed., Graphic Signs of Identity, Faith, and Power in Late Antiquity and the Early Middle Ages. Cursor Mundi, 27, Turnhout: Brepols, 2017, xviii, 392 p., 141 ill.

Mediaevistik ◽  
2020 ◽  
Vol 32 (1) ◽  
pp. 377-379
Author(s):  
Kriszta Kotsis
Keyword(s):  
Middle Ages ◽  
Interdisciplinary Research ◽  
Late Antiquity ◽  
Visual Communication ◽  
Group Identity ◽  
Religious Affiliation ◽  
Late Antique ◽  
The Third ◽  
Cursor Mundi ◽  
Definition Of

Late antique and early medieval graphic signs have traditionally been studied by narrowly focused specialists leading to the fragmentation and decontextualization of this important body of material. Therefore, the volume aims “to deepen interdisciplinary research on graphic signs” (7) of the third through tenth centuries, with contributions from archaeologists, historians, art historians, a philologist, and a paleographer. Ildar Garipzanov’s introduction defines the central terms (sign, symbol, graphicacy), calls for supplanting the text-image binary with “the concept of the visual-written continuum” (15), and argues that graphicacy was central to visual communication in this period. He emphasizes the agency of graphic signs and notes that their study can amplify our understanding of the definition of personal and group identity, the articulation of power, authority, and religious affiliation, and communication with the supernatural sphere.

The Limit Situation And The Narrative Of War (On The Material Of The Novel “My Lieutenant” By Daniil Granin)

2020 ◽  
Vol 6 (1) ◽  
pp. 90-104
Author(s):  
Anatoly S. Kuprin ◽  
Galina I. Danilina
Keyword(s):  
20Th Century ◽  
Scientific Work ◽  
Point Of View ◽  
Continuous Limit ◽  
The Novel ◽  
Term Limit ◽  
Abstract Author ◽  
The Third ◽  
Definition Of

The purpose of this study is the analysis of limit situation in the narrative of war. The material of the study is the novel of Daniil Granin “My Lieutenant” and related texts. In the first part of the paper, the authors explore existing approaches to the term “limit situation” and similar concepts into scientific and philosophical traditions; limits of its applicability in literary studies and its relation to the categories of “narrative instances” and “event”. Proposed a literary-theoretical definition of the limit situation, which can be used in the analysis of fiction texts. Existing approaches to the examination of the situation of war are analyzed: philosophical-existential, psychoanalytic, sociological, literary. In the second part of the paper, the authors propose their method for analyzing limit situations in texts about war, which basis on existing approaches and preserves the text-centric principle of studying the structure of the story. Two interrelated areas of research have been identified: the study of war as a continuous limit situation in the intertextual aspect (the discourse of war); the study of limit situations (death, suffering, guilt, accident) in the narrative of war as part of a specific text. In the third part of the scientific work,the analysis of war as a continuous limit situation results in the study of the concept of “limit” (border) in a fiction text. The role of “limit” (border) concept in the texts about the war is studied, the possible types of limits in the discourse of war are examined. Limit situations in the narrative of war are analyzed on the basis of the novel “My Lieutenant” by Daniil Granin. A review of journalistic and scientific works about the novel revealed both the continuity and the differences between the novel and the “lieutenant” prose of the 20th century. An analysis of the limit situations in the novel revealed their key position in the narrative. These situations are independent of the fiction time, of the fluctuation of the point of view’; the function of the abstract author is to build the narrative as a “directive” immersion of the hero and narrator in these situations.

Delving into Horror

2019 ◽  
Vol 29 (5) ◽  
pp. 135-150
Keyword(s):  
The Self ◽  
Time And Space ◽  
The Third ◽  
The World ◽  
The Subject ◽  
Perception Of Time ◽  
Definition Of

The springboard for this essay is the author’s encounter with the feeling of horror and her attempts to understand what place horror has in philosophy. The inquiry relies upon Leonid Lipavsky’s “Investigation of Horror” and on various textual plunges into the fanged and clawed (and possibly noumenal) abyss of Nick Land’s work. Various experiences of horror are examined in order to build something of a typology, while also distilling the elements characteristic of the experience of horror in general. The essay’s overall hypothesis is that horror arises from a disruption of the usual ways of determining the boundaries between external things and the self, and this leads to a distinction between three subtypes of horror. In the first subtype, horror begins with the indeterminacy at the boundaries of things, a confrontation with something that defeats attempts to define it and thereby calls into question the definition of the self. In the second subtype, horror springs from the inability to determine one’s own boundaries, a process opposed by the crushing determinacy of the world. In the third subtype, horror unfolds by means of a substitution of one determinacy by another which is unexpected and ungrounded. In all three subtypes of horror, the disturbance of determinacy deprives the subject, the thinking entity, of its customary foundation for thought, and even of an explanation of how that foundation was lost; at times this can lead to impairment of the perception of time and space. Understood this way, horror comes within a hair’s breadth of madness - and may well cross over into it.

The post-Newtonian approximation

2018 ◽  
Author(s):  
Nathalie Deruelle ◽  
Jean-Philippe Uzan
Keyword(s):  
General Relativity ◽  
Gravitational Field ◽  
Body Problem ◽  
Equations Of Motion ◽  
Two Body Problem ◽  
Newtonian Approximation ◽  
Actual Motion ◽  
Law Of Attraction ◽  
Universal Law ◽  
Two Bodies

This chapter embarks on a study of the two-body problem in general relativity. In other words, it seeks to describe the motion of two compact, self-gravitating bodies which are far-separated and moving slowly. It limits the discussion to corrections proportional to v2 ~ m/R, the so-called post-Newtonian or 1PN corrections to Newton’s universal law of attraction. The chapter first examines the gravitational field, that is, the metric, created by the two bodies. It then derives the equations of motion, and finally the actual motion, that is, the post-Keplerian trajectories, which generalize the post-Keplerian geodesics obtained earlier in the chapter.

After Chalcedon

2018 ◽  
Author(s):  
Brian E. Daley, SJ
Keyword(s):  
Eighth Century ◽  
Seventh Century ◽  
The Third ◽  
John Of Damascus ◽  
Perceived Impact ◽  
Orthodox Theology ◽  
Definition Of ◽  
Maximus The Confessor ◽  
Severus Of Antioch

The Council of Chalcedon’s definition of the terms in which Nicene orthodoxy should conceive of Christ’s person remained controversial. Leontius of Byzantium argued for the correctness of the Council’s formulation, especially against the arguments of Severus of Antioch, but suggested that more than academic issues were at stake: the debate concerned the lived, permanently dialectical unity between God and humanity. In the mid-seventh century, imperially sponsored efforts to lessen the perceived impact of Chalcedonian language by stressing that Christ’s two natures were activated by “a single, theandric energy,” also remained without effect: largely because of the monk Maximus “the Confessor”, who argued that two complete spheres of activity and two wills remained evident in Christ’s life. Maximus’s position was ratified at the Lateran Synod and at the Third Council of Constantinople. The eighth-century Palestinian monk John of Damascus incorporated these arguments into his own influential synthesis of orthodox theology.

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