scholarly journals Test corpuscles in general relativity

1937 ◽  
Vol 5 (2) ◽  
pp. 63-81 ◽  
Author(s):  
H. P. Robertson
Keyword(s):  
World Line ◽  
Point Of View ◽  
Theoretical Physics ◽  
Finite Limit ◽  
Theory Of Relativity ◽  
The World ◽  
Electromagnetic Field Strength ◽  
Physical Attributes ◽  
Original Field ◽  
Extended Field

In the general theory of relativity, as in many other branches of theoretical physics, the material and energetical content of spacetime is considered, in the first instance, as an extended field, which is specified by means of field quantities (energy-momentum-stress tensor, charge-current density, electromagnetic field strength). From this point of view corpuscles (material particles, photons) are constructs obtained by first considering the field quantities as nonvanishing only within certain world tubes, and then passing by limiting processes to the idealisation in which these world tubes are shrunk into world lines. More precisely, this passage to the corpuscular description may be thought of as accomplished by replacing the original field by successive members of a sequence of field distributions, satisfying the same field laws, which cluster more and more in the neighbourhood of the world lines, and for which in some significant sense the total measure approaches a finite limit. Each such world line, together with the limiting measures of those portions of the field quantities associated therewith, is then a corpuscle; the form of the world line determines the motion of the corpuscle, and the associated “corpuscular quantities” its physical attributes (mass or energy, momentum, charge).

Covariant Physics

2021 ◽  
Author(s):  
Moataz H. Emam
Keyword(s):  
Point Of View ◽  
Theoretical Physics ◽  
Newtonian Mechanics ◽  
Theory Of Relativity ◽  
College Physics ◽  
Introductory Courses ◽  
Tensor Calculus ◽  
Research Papers ◽  
Intended Reader ◽  
Theory Of Fields

This book is an introduction to the modern methods of the general theory of relativity, tensor calculus, space time geometry, the classical theory of fields, and a variety of theoretical physics oriented topics rarely discussed at the level of the intended reader (mid-college physics major). It does so from the point of view of the so-called principle of covariance; a symmetry that underlies most of physics, including such familiar branches as Newtonian mechanics and electricity and magnetism. The book is written from a minimalist perspective, providing the reader with only the most basic of notions; just enough to be able to read, and hopefully comprehend, modern research papers on these subjects. In addition, it provides a (hopefully short) preparation for the student to be able to conduct research in a variety of topics in theoretical physics; with particular emphasis on physics in curved spacetime backgrounds. The hope is that students with a minimal mathematical background in calculus and only some introductory courses in physics may be able to study this book and benefit from it.

Medical Diagnosis from a Clinician’s Point of View

1978 ◽  
Vol 17 (01) ◽  
pp. 28-35
Author(s):  
F. T. De Dombal
Keyword(s):  
Decision Making ◽  
Data Analysis ◽  
Computer Science ◽  
Medical Diagnosis ◽  
Information Science ◽  
Point Of View ◽  
Joint Research ◽  
The World

This paper discusses medical diagnosis from the clinicians point of view. The aim of the paper is to identify areas where computer science and information science may be of help to the practising clinician. Collection of data, analysis, and decision-making are discussed in turn. Finally, some specific recommendations are made for further joint research on the basis of experience around the world to date.

Russia and China: The Vector of Development of Economic Cooperation

2004 ◽  
pp. 113-122
Author(s):  
L. Kabir
Keyword(s):  
World Economy ◽  
Economic Cooperation ◽  
Point Of View ◽  
Basic Commodity ◽  
The World ◽  
Economic Ties

This article considers the basic tendencies of development of trade and economic cooperation of the two countries with accent on increasing volumes and consolidating trade and economic ties in Russian-Chinese relations. The author compares Russian and Chinese participation in the world economy and analyzes the counter trade from the point of view of basic commodity groups.

The Event Universe

2015 ◽  
Author(s):  
Leemon B. McHenry
Keyword(s):  
Electromagnetic Field ◽  
Quantum Mechanics ◽  
Common Sense ◽  
Physical Theory ◽  
Alfred North Whitehead ◽  
Bertrand Russell ◽  
Theory Of Relativity ◽  
The World ◽  
Modern Physics ◽  
Linguistic Methods

What kinds of things are events? Battles, explosions, accidents, crashes, rock concerts would be typical examples of events and these would be reinforced in the way we speak about the world. Events or actions function linguistically as verbs and adverbs. Philosophers following Aristotle have claimed that events are dependent on substances such as physical objects and persons. But with the advances of modern physics, some philosophers and physicists have argued that events are the basic entities of reality and what we perceive as physical bodies are just very long events spread out in space-time. In other words, everything turns out to be events. This view, no doubt, radically revises our ordinary common sense view of reality, but as our event theorists argue common sense is out of touch with advancing science. In The Event Universe: The Revisionary Metaphysics of Alfred North Whitehead, Leemon McHenry argues that Whitehead's metaphysics provides a more adequate basis for achieving a unification of physical theory than a traditional substance metaphysics. He investigates the influence of Maxwell's electromagnetic field, Einstein's theory of relativity and quantum mechanics on the development of the ontology of events and compares Whitehead’s theory to his contemporaries, C. D. Broad and Bertrand Russell, as well as another key proponent of this theory, W. V. Quine. In this manner, McHenry defends the naturalized and speculative approach to metaphysics as opposed to analytical and linguistic methods that arose in the 20th century.

THE GENESIS OF CONSERVATIVE IDEOLOGY, DEVELOPMENT TRENDS AND PROSPECTS IN THE POLITICAL REFORM OF MODERN COUNTRIES (ON THE EXAMPLE OF RUSSIA AND FRANCE)

2020 ◽  
Vol 10 (4) ◽  
pp. 38-43
Author(s):  
MARIETA EPREMYAN ◽  
Keyword(s):  
Political Reform ◽  
Point Of View ◽  
The Political ◽  
Development Trends ◽  
Conservative Ideology ◽  
The World ◽  
Christian Conservatism ◽  
The Future ◽  
Conservative Policy ◽  
Depth Interviews

The article examines the epistemological roots of conservative ideology, development trends and further prospects in political reform not only in modern Russia, but also in other countries. The author focuses on the “world” and Russian conservatism. In the course of the study, the author illustrates what opportunities and limitations a conservative ideology can have in political reform not only in modern Russia, but also in the world. In conclusion, it is concluded that the prospect of a conservative trend in the world is wide enough. To avoid immigration and to control the development of technology in society, it is necessary to adhere to a conservative policy. Conservatism is a consolidating ideology. It is no coincidence that the author cites as an example the understanding of conservative ideology by the French due to the fact that Russia has its own vision of the ideology of conservatism. If we say that conservatism seeks to preserve something and respects tradition, we must bear in mind that traditions in different societies, which form some kind of moral imperatives, cannot be a single phenomenon due to different historical destinies and differing religious views. Considered from the point of view of religion, Muslim and Christian conservatism will be somewhat confrontational on some issues. The purpose of the work was to consider issues related to the role, evolution and prospects of conservative ideology in the political reform of modern countries. The author focuses on Russia and France. To achieve this goal, the method of in-depth interviews with experts on how they understand conservatism was chosen. Already today, conservatism is quite diverse. It is quite possible that in the future it will transform even more and acquire new reflections.

Social Justice and Critical/Performative Communicative Pedagogy

2011 ◽  
Vol 4 (1) ◽  
pp. 21-34 ◽  
Author(s):  
John T. Warren
Keyword(s):  
Qualitative Research ◽  
Social Justice ◽  
Classroom Interactions ◽  
Point Of View ◽  
Constitutive Relationship ◽  
Just World ◽  
The World ◽  
Analytical Point ◽  
Embodied Pedagogy

Through narratives and critical interrogations of classroom interactions, I sketch an argument for a co-constitutive relationship between qualitative research and pedagogy that imagines a more reflexive and socially just world. Through story, one comes to see an interplay between one's own experiences, one's own desires and one's community — I seek to focus that potential into an embodied pedagogy that highlights power and, as a result, holds all of us accountable for our own situated-ness in systems of power in ways that grant us potential places from which to enact change. Key in this discussion is a careful analytical point of view for seeing the world and a set of practices that work to imagine new ways of talking back.

History of Tour de France from the Geographical Point of View

2013 ◽  
Vol 22 (3-4) ◽  
pp. 255-277 ◽  
Author(s):  
Vladimír Bačík ◽  
Michal Klobučník
Keyword(s):  
Point Of View ◽  
The Past ◽  
Advanced Technologies ◽  
The World ◽  
Spatial Dimensions ◽  
Tour De France ◽  
Wide Circle ◽  
History Of ◽  
Expert Community ◽  
Geographical Point

Abstract The Tour de France, a three week bicycle race has a unique place in the world of sports. The 100th edition of the event took place in 2013. In the past of 110 years of its history, people noticed unique stories and duels in particular periods, celebrities that became legends that the world of sports will never forget. Also many places where the races unfolded made history in the Tour de France. In this article we tried to point out the spatial context of this event using advanced technologies for distribution of historical facts over the Internet. The Introduction briefly displays the attendance of a particular stage based on a regional point of view. The main topic deals with selected historical aspects of difficult ascents which every year decide the winner of Tour de France, and also attract fans from all over the world. In the final stage of the research, the distribution of results on the website available to a wide circle of fans of this sports event played a very significant part (www.tdfrance.eu). Using advanced methods and procedures we have tried to capture the historical and spatial dimensions of Tour de France in its general form and thus offering a new view of this unique sports event not only to the expert community, but for the general public as well.

THE LAPBOOK AS A DIDACTIC TOOL TO IMPLEMENT INTEGRATED TRAINING IN NATURAL SCIENCE AND TECHNOLOGY AND ENTREPRENEURSHIP AT PRIMARY SCHOOL LEVEL

2018 ◽  
Vol 28 (3) ◽  
pp. 959-963 ◽  
Author(s):  
Yordanka Peycheva ◽  
Snezhana Lazarova
Keyword(s):  
Natural Science ◽  
Lessons Learned ◽  
Point Of View ◽  
School Level ◽  
Integrative Approach ◽  
Educational Goals ◽  
Knowledge And Skills ◽  
Global Issues ◽  
Highly Active ◽  
The World

The formation of comprehensive and in-depth notions of objects and phenomena in the world can be achieved when the mastery of knowledge and skills is carried out in a system realized in the context of integration of different scientific directions. One of the main issues in modern education is related to the contradiction - on one hand between the need to form the skills necessary for the orientation and adaptation of the personality in the dynamics of the globalizing world and on the other - the education which is largely based on unilateral acquiring of knowledge and skills within the different subject areas. This influences the development of a worldview and the formation of an adequate attitude towards the problems under consideration and the world as a whole. The knowledge and skills acquired today are often “locked” in the respective direction. The cross-curricular unity in the curriculum is of a recommended nature, but even if it is realized, it does not fully meet the need for a comprehensive and multifaceted consideration of global issues, as a result of which the student not only understands, reflects, but also applies the lessons learned in the process of creating a product - ideal or material. Combining the intellectual nature of the cognitive process with the practice activity are conditions in which the students are highly active and achieve better learning outcomes. Therefore, it is expedient for the different directions to correspond more closely to each other and to carry out effective cross-curricular integration. The concept of applying an integrative approach in the current paper is based on the idea of creating pedagogical conditions for reconciling the goals and expected outcomes of technology and entrepreneurship and natural sciences studied at the initial stage of the primary education. Integration can take place on two levels - knowledge and skills. We believe that the lapbook as an innovative didactic tool contains the necessary potential for effective realization of the educational goals in both directions in terms of achieving the expected results. In the course of its elaboration, new information is acquired in the field of engineering and technology, specific skills underlying the curricula of technology and entrepreneurship programs are developed. At the same time, a number of subjects from the learning content, which are considered from the natural science point of view, are enriched and perceived in a technological way, after which they find place in an attractive book - a lapbook, made by the students themselves. Its utilitarian value is multiplied by the personal contribution to its creation - not only as an object but also as content. The main topics that are of interest to the students are exploring and preserving nature, jobs, modern technical achievements, holidays and customs. As a result of the adequate integration of competences, tailored to curricula, a number of skills are formed, such as: skills for searching on their own, systematization and presentation of information, and application of the lessons learned in a new situation.

To the Question of the Classification Patterns of Social Stratification in the Countries of the World (Brief Overview of Some Concepts and Author’s Comment)

2020 ◽  
pp. 65-75
Author(s):  
S. N. Smirnov
Keyword(s):  
Social Sciences ◽  
Social Stratification ◽  
Legal Status ◽  
Scientific Literature ◽  
Point Of View ◽  
The World

The author considers the problems of typification of society. Some concepts of typification of social stratification models in different countries formulated and justified in historical and legal, historical, sociological, and economic scientific literature are reviewed. The circumstances that make it difficult to formulate universal concepts designed for application in the complex of social Sciences are identified. These circumstances include insufficient consideration of legal factors, including the position of the legislator, the specifics of the corporate legal status, and the characteristics of the mechanism for changing individual legal status. The author offers a variant of classification of society types from the point of view of legal registration of their structure. The possibility of distinguishing types such as consolidated companies and segmented companies is justified.

A Typology of Moral Progress

2018 ◽  
Author(s):  
Allen Buchanan
Keyword(s):  
Civil Rights ◽  
Moral Reasoning ◽  
Moral Status ◽  
Point Of View ◽  
Premarital Sex ◽  
Moral Progress ◽  
Equal Rights ◽  
Chattel Slavery ◽  
The World ◽  
Moral Point

This chapter identifies a number of developments that are candidates for moral progress: abolition of the Atlantic chattel slavery, improvements in civil rights for minorities, equal rights for women, better treatment of (some) non-human animals, and abolition of the cruellest punishments in most parts of the world. This bottom-up approach is then used to construct a typology of moral progress, including improvements in moral reasoning, recognition of the moral standing or equal basic moral status of beings formerly thought to lack them, improvements in understandings of the domain of justice, the recognition that some behaviors formerly thought to be morally impermissible (such as premarital sex, masturbation, lending money at interest, and refusal to die “for king and country”) can be morally permissible, and improvements in understandings of morality itself. Finally, a distinction is made between improvements from a moral point of view and moral progress in the fullest sense.

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