v.8 n.5 June

From the history of physics. Why is there no energy density of the gravitational field in Einstein's equation?

Victoria Alexandrovna Kuzmicheva, and Valery Borisovich Morozov

Parana J. Sci. Educ., v.8, n.5, (1-4), June 5, 2022.

DOI: tiny.cc/PJSE24476153v8i5p001-004

Abstract

The sequence of A. Einstein's ideas in the development of the general covariant equation of the gravitational field is restored. Initially, the general theory of relativity was based on the principle that any energy, including the energy of the gravitational field, is the source of the gravitational field. However, Einstein had to remove this principle from the final equation of the gravitational field, for the sake of the covariance of the field equations. For this, the smallness of the field energy density was used. But now we have no confidence that Einstein's equation is applicable to any strong fields.

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On energy of static gravity field

Victoria Alexandrovna Kuzmicheva, and Valery Borisovich Morozov

Parana J. Sci. Educ., v.8, n.5, (5-8), June 5, 2022.

DOI: tiny.cc/PJSE24476153v8i5p005-008

Abstract

Energy density of gravity field is obtained. This allows realization of the Einstein's postulate that any energy is a source of a gravity field. In the non-relativistic case, this allows to enter the gravitational energy as a source of the field in the Poisson equation. This equation takes an intermediate position between the Poisson equation and the Einstein equation.

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DESIGN AND MODELLING OF FIRE WARNING AND CONTROL SYSTEM

Sourabh Jain, Sakshi Doriya, Priyanshu Gupta, Pankaj Surariya, Roshni Chouhan, Antul Soni, and Tushar Gokhe

Parana J. Sci. Educ., v.8, n.5, (9-x), June 5, 2022.

DOI: tiny.cc/PJSE24476153v8i5p009-017

Abstract

House combustion is the main concern of builders, designers and property resistance. A fire detection system is an active fire protection method; a fire detection system requires an accurate and fast mechanism to make the right decision in a fire situation. Since most commercial fire detection systems use a single sensor, a singular sensor was used for a long time in the event of detection of a fire, but their fire recognition accuracy is deficient because of the limitation of the detection capability of the sensor. Due to presence of number of hazard in an occupancy or industry it’s needed to employ fire monitoring and control system. For this we tried to propose a plan of a system which consists of GSM 800 L, ESP32, Flame sensor, temperature sensor, jumper wires and bread board. The proposed model in the paper is a new life detection system with a multifunctional artificial intelligence framework, framework includes a set of multi machine learning algorithm this paper suggests different detector (such as heat, flame and temperature).

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