scholarly journals Gravity and Inertia in General Relativity

2021 ◽  
Author(s):  
James F. Woodward

The relationship of gravity and inertia has been an issue in physics since Einstein, acting on an observation of Ernst Mach that rotations take place with respect to the “fixed stars”, advanced the Equivalence Principle (EP). The EP is the assertion that the forces that arise in proper accelerations are indistinguishable from gravitational forces unless one checks ones circumstances in relation to distant matter in the universe (the fixed stars). By 1912, Einstein had settled on the idea that inertial phenomena, in particular, inertial forces should be a consequence of inductive gravitational effects. About 1960, five years after Einstein’s death, Carl Brans pointed out that Einstein had been mistaken in his “spectator matter” argument. He inferred that the EP prohibits the gravitational induction of inertia. I argue that while Brans’ argument is correct, the inference that inertia is not an inductive gravitational effect is not correct. If inertial forces are gravitationally induced, it should be possible to generate transient gravitational forces of practical levels in the laboratory. I present results of a experiment designed to produce such forces for propulsive purposes.

2005 ◽  
Vol 14 (12) ◽  
pp. 1977-1988
Author(s):  
FRANZ EMBACHER

The Thirring–Lense effect is the phenomenon that an observer near a rotating mass, being in a state which is non-rotating with respect to the rest of the universe, experiences extra inertial forces, i.e. becomes dizzy. The first anticipation of the effect goes back to Ernst Mach; its first quantitative prediction on the basis of general relativity was given by Hans Thirring and Joseph Lense. Almost ninety years later, the effect seems to be experimentally verified.


2021 ◽  
pp. 151-162
Author(s):  
B. Machado Mazzetti ◽  
F. Chibás Ortiz

This article seeks to reflect on the already existing and inseparable rela­ tionships between society, sustainability, culture and leisure, bringing to the core of the reflection the concept of MIL Cities (Media Information as a potential scenario for developing new urban, human, cul­ tural and technological. Initially, a review of the concept of leisure was made, addressing its foundational pillars and cultural contents, poste­ riorly the relationship between individual and quality of life in cities is explained, through body practices and body awareness, as well as through environmental practices and the promotion of an increasingly active and collective environmental awareness. The relationship of oc­ cupation, belonging and right to the city is also addressed and, precisely at this point, the potential for the use of new technologies by the private sector, public authorities and civil society in the construction and appli­ cation of possibilities that permeate the universe of MIL Cities.


Author(s):  
Mike Goldsmith

In 1916, Einstein published his theory of general relativity, which incorporated fundamentally new ideas about the nature of gravity, including that gravitational effects take time to travel. He also showed that under some circumstances, objects lose energy by emitting ‘ripples’ in time and space: gravitational waves. ‘Gravitational waves’ explains how these waves are very weak and only the most powerful events in the Universe generate strong enough versions to be detected. Gravitational waves differ from other kinds of waves as their only effect is to cause objects to move together and then apart again. They provide a unique new window on the Universe, allowing us to look deeper and further than ever before.


2020 ◽  
Vol 80 (9) ◽  
Author(s):  
M. Roushan ◽  
K. Nozari

AbstractQuantum gravitational effects may affect the large scale dynamics of the universe. Phenomenologically, quantum gravitational effect at large distances can be encoded in an extended uncertainty principle that admits a minimal measurable momentum/energy or a maximal length. This maximal length can be considered as the size of the cosmological horizon today. In this paper we study thermostatistics of an expanding universe as a gaseous system and in the presence of an invariant infrared cutoff. We also compare the thermostatistics of different eras of the evolution of the universe in two classes, Fermions and Bosons.


1987 ◽  
Vol 125 ◽  
pp. 461-461 ◽  
Author(s):  
Mao Xinjie ◽  
Tong Yi

Based on Zakharov's equations, Karpman et al. claimed that there were solitons in the magnetosphere. According to the model proposed by Goldreich and Julin, there is a strong induced electric field in the magnetosphere. It seems that we should include the nonlinear effects of the electric field on the polarization of hydrogen atoms if there really are some hydrogen atoms spreading in the magnetosphere of the pulsar. Assuming the magnetosphere is symetric, therefore the electric polarization of hydrogen atoms is of the form P=χ(1)E +χχE3. We treat χ(1) and χ(2) as scalars because most hydrogen atoms in the universe are in the ground state and χ(3) is much smaller than χ(1).


Koneksi ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 178
Author(s):  
Ratna Sari Puspa ◽  
Suzy Azeharie

The Tamil Hindu ethnic community is spread across Indonesia, the majority live in Medan North Sumatra. Obiyem ritual is a religious activity believed by the Tamil Hindu ethnic community. The ritual has existed since the time of Bharatayudha and it is believed to eliminate bad karma for anyone who participates and performs the ritual. This ritual also obliges the devotees to make offerings to the Gods and Goddesses as a form of gratitude for giving abundance, maintain and protecting the universe. With the existence of ritual communication, the Tamil Hindu ethnic community in Medan can communicate and relate to the creator through the Obiyem ritual. This tradition is still carried out by the Tamil Hindu ethnic community to this day. The purpose of this study is to find out how the ritual communication is at the ceremony to the Tamil Hindu ethnic in Medan and what preparations are needed when the ritual is performed. Theories used in this research are communication theory, ritual communication and transcendental communication.The research method used was a phenomenological method with a qualitative descriptive approach. The data were obtained from in-depth interviews with three sources who understood about the ritual of Obiyem. The conclusion of this study is the ritual of Obiyem is a media used to communicate between humans and the Creator so that all bad karma is eliminated. It is also strengthen the relationship of Tamil Hindu ethnic society.Masyarakat etnis Tamil Hindu di Indonesia mayoritas berada di kota Medan, Sumatera Utara. Ritual Obiyemmerupakan kegiatan keagamaan bagi etnis Tamil Hindu. Ritual Obiyemsudah ada sejak zaman Bharatayudha. Ritual ini dipercaya bisa menghapuskan karma buruk bagi siapapun yang ikut serta dan melakukan ritual ini. Ritual ini juga mewajibkan para jemaah untuk memberikan persembahan kepada para dewa dan dewi sebagai bentuk terima kasih karena sudah memberi kelimpahan, memelihara dan menjaga alam semesta. Dengan adanya komunikasi ritual masyarakat etnis Tamil Hindu di Medan dapat berkomunikasi dan berhubungan dengan sang pencipta melalui ritual Obiyem. Ritual ini masih dilaksanakan oleh masyarakat etnis Tamil Hindu sampai saat ini. Penelitian ini ingin mengetahui bagaimana  komunikasi ritual Obiyempada etnis Tamil Hindu di kota Medan dan apa saja persiapan yang dibutuhkan pada saat ritual Obiyem dilakukan. Teori yang digunakan dalam penelitian ini adalah teori komunikasi, komunikasi ritual dan komunikasi transendental. Penelitian ini menggunakan metode fenomenologi dengan pendekatan deskriptif kualitatif. Data diperoleh dari hasil wawancara mendalam dengan narasumber yang mengetahui ritual Obiyem. Kesimpulan dari penelitian ini adalah ritual Obiyemmerupakan media yang digunakan untuk berkomunikasi antara manusia dan sang pencipta untuk menghapuskan karma buruk. Komunikasi ritual ini juga dilakukan untuk mempererat hubungan masyarakat etnis Tamil Hindu.


2015 ◽  
Vol 10 (1) ◽  
Author(s):  
Dr. Poonam Khurana ◽  
Mr. Miklesh Prasad Yadav ◽  
Ms. Deepika Varshney

All human beings are virtue by God as they get controlling mind and an attitude towards something with the help of which they can experience spirituality. People have different psychological thoughts and beliefs relating to god. Some people feel the immense pleasure in performing religious activities while some believe in the thought "Ahem Brahmasmi" i.e I am part of the divine and they feel pleasure in activities which motivate them to achieve peace. Religion in psychology is considered as a specific fundamental set of beliefs, thoughts and practices generally agreed and controlled by a number of person. It is the psychology of a person which commands their mind in deciding at which path they can attain the eternal feelings of the universe and accordingly they will develop their behavior towards religion and spirituality. Keeping the same in mind, the present study is based much on literature and a brief analysis of 50 teachers in Delhi and NCR collegesandmakes an attempt to study the relationship of spiritual quotient and effective teaching and suggest spiritual quotient as a considerablepredictor to make the workplace accessible.


1976 ◽  
Vol 74 (2) ◽  
pp. 335-351 ◽  
Author(s):  
H. P. Greenspan

We examine a rapidly rotating flow that exhibits periodic vortex detachment. Specifically, the rotation/symmetry axis of a fluid-filled cylinder is set perpendicular to gravity. A free buoyant cylindrical float placed within the container is acted upon by both centrifugal and gravitational forces, the competition of which causes fluid motion and, in certain parameter ranges, flow instability. The motion is determined, a criterion for separation is advanced, preliminary experiments and data are described and the relationship of this phenomenon to other examples of vortex shedding in rotating fluids is discussed.


2021 ◽  
Vol 12 (3) ◽  
pp. 143-146
Author(s):  
M R Sandhya ◽  
M V Vinodkumar

Theory of Triguna, originally explained in Sankhya Darshana and accepted in Ayurveda, says that the whole universe is composed of three major attributes namely Satwa, Raja and Tama. The living being, with its physique and psyche, represents the universe, hence, is made up of these three major attributes. The relationship of triguna with Panchamahabhuta, Tridosha and Shadchakra are already studied. Transactional analysis and triguna are inter-related. Basic emotions of human beings are love, hatred and fear. They generate need, action and confusion. These three qualities are interdependent, complementary and antagonistic at the same time. Wellness of human beings incorporates eight mutually interdependent dimensions. All these dimensions cannot be satisfied by a personality with a single guna, but a combination of Satwa, Raja and Tamo guna play here. Similarly multiple intelligences in a person depend on the predominant guna present in them. By understanding and promoting the multiple intelligences in a person helps to shine them in their own world. This paper is a prime attempt to put light on the concept of triguna.


2020 ◽  
Vol 15 (4) ◽  
pp. 65-80
Author(s):  
T. G. Korneeva

The article deals with the problem of determining the primordial in the philosophy of Nasir Khusraw, the Isma‘ili thinker of the 11th century. It seems to be an obvious answer that «the primordial is God», but this statement becomes impossible in Isma‘ilism due to the absolute separation of the transcendent incomprehensible God from the world manifested in intelligible and sensuous diversity. The article deals with the origins of the problem of the relationship of the single original and the multiple world, gives a brief overview of solutions to this issue by different schools of Arab Muslim philosophy. Within the framework of Isma‘ilism, two schemes of the process of creation of the universe were proposed, one of which was actively developed by Nasir Khusraw. According to the views of the Isma‘ili philosopher, the basis of all things is the word of God: it has an absolute being and potentially contains all things. The consequence of the word of God is the Universal Mind, which is endowed with the necessary being and has knowledge of all things. The Universal Soul, which emerges from the Universal Mind, has the power to create and thereby materializes the knowledge of the Universal Mind in the diversity of the material world. So, what can be called the initial? God, in fact, is taken out of the field of reasoning, He only speaks His word. The word of God is the cause of all things, but it does not give existence to the world. The world is created by the universal Soul, it is its Creator, but the Universal Soul itself is the creation of the Universal Mind, the consequence of the word of God. In Nasir Khusraw’s doctrine of being it is impossible to distinguish a single primordial, its functions are distributed between the word of God, his inseparable consequence the Universal Mind and the Universal Soul which derived from the Mind.


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