scholarly journals Calculations of the relativistic effects in many-electron atoms and space-time variation of fundamental constants

1999 ◽  
Vol 59 (1) ◽  
pp. 230-237 ◽  
Author(s):  
V. A. Dzuba ◽  
V. V. Flambaum ◽  
J. K. Webb
Keyword(s):  
Time Variation ◽  
Relativistic Effects ◽  
Space Time ◽  
Fundamental Constants

scholarly journals Measuring space-time variation of the fundamental constants with redshifted submillimetre transitions of neutral carbon

2011 ◽  
Vol 533 ◽  
pp. A55 ◽  
Author(s):  
S. J. Curran ◽  
A. Tanna ◽  
F. E. Koch ◽  
J. C. Berengut ◽  
J. K. Webb ◽  
...  
Keyword(s):  
Time Variation ◽  
Space Time ◽  
Fundamental Constants ◽  
Measuring Space

Discreteness of Space and Its Consequences

2021 ◽  
pp. 132-141
Author(s):  
Аnatoly М. Shutyi ◽  
Keyword(s):  
Spatial Configuration ◽  
Relativistic Effects ◽  
Space Time ◽  
Maximum Speed ◽  
Speed Of Light ◽  
Quantum Uncertainty ◽  
Proposed Model ◽  
Spatial Configurations ◽  
New Interpretation ◽  
Component Particle

Based on the general principle of the unity of the nature of interacting entities and the principle of the relativity of motion, as well as following the requirement of an indissoluble and conditioning connection of space and time, the model of a discrete space-time consisting of identical interacting particles is proposed as the most acceptable one. We consider the consequences of the discreteness of space, such as: the occurrence of time quanta, the limiting speed of signal propa­gation, and the constancy of this speed, regardless of the motion of the reference frame. Regularly performed acts of particles of space-time (PST) interaction en­sure the connectivity of space, set the quantum of time and the maximum speed – the speed of light. In the process of PST communication, their mixing occurs, which ensures the relativity of inertial motion, and can also underlie quantum uncertainty. In this case, elementary particles are spatial configurations of an excited “lattice” of PST, and particles with mass must contain loop struc­tures in their configuration. A new interpretation of quantum mechanics is pro­posed, according to which the wave function determines the probability of de­struction of a spatial configuration (representing a quantum object) in its corresponding region, which leads to the contraction of the entire structure to a given, detectable component. Particle entanglement is explained by the appear­ance of additional links between the PST – the appearance of a local coordinate along which the distance between entangled objects does not increase. It is shown that the movement of a body should lead to an asymmetry of the tension of the bonds between the PST – to the asymmetry of its effective gravity, the es­tablishment of which is one of the possibilities for experimental verification of the proposed model. It is shown that the constancy of the speed of light in a vac­uum and the appearance of relativistic effects are based on ensuring the connec­tivity of space-time, i.e. striving to prevent its rupture.

scholarly journals VARIACIÓN ESPACIO-TEMPORAL DE PLANTAS VASCULARES ACUÁTICAS EN EL COMPLEJO CENAGOSO DEL BAJO SINÚ, CÓRDOBA, COLOMBIA

2015 ◽  
Vol 20 (3) ◽  
pp. 155-165 ◽  
Author(s):  
Nabi Del Socorro PÉREZ-VÁSQUEZ ◽  
Jorge Arias-Rios ◽  
Jorge Alexander Quirós-Rodríguez
Keyword(s):  
Time Variation ◽  
Vascular Plants ◽  
Aquatic Vegetation ◽  
Lemna Minor ◽  
Space Time ◽  
Short Period ◽  
The Family ◽  
San Sebastian ◽  
Dynamic Growth ◽  
One Year

<p>Se determinó la variación espacio temporal de las plantas vasculares acuáticas en las ciénagas de María Arriba, San Sebastián, Purísima y Momil del complejo cenagoso del bajo Sinú (CCBS), en el departamento de Córdoba (Colombia), abarcando los periodos hidrológicos ocurridos durante el año 2011. El área de estudio se dividió en cuatro sectores y mediante el método de intercepción en línea se determinó la abundancia y frecuencia de las hidrófitas. En cada sector se extendió una línea de 200 m perpendicular al litoral y sobre ella se ubicaron cuadrantes de 1 m<sup>2</sup> cada 50 m, en los que, se determinó la cobertura y frecuencia de las diferentes especies  Se registraron 39659 individuos distribuidos en 24 familias, 30 géneros y 35 especies. La mayor abundancia de especies se presentó en Momil con 18582 individuos, siendo la familia Lemnaceae la más representativa. El análisis de varianza (ANOVA) indica que no existen diferencias estadísticas significativas en la abundancia de la especies de plantas acuáticas de los  meses de muestreo (F=1,04; GL=11; <em>p</em> = 0,083), sin embargo, se evidenció la incidencia del período hidrológico sobre la dinámica de crecimiento de las plantas, algunas especies desaparecen en época seca, otras sobreviven un periodo corto de tiempo, mientras que otras como <em>Lemna minor</em> L y <em>Salvinia auriculata</em> Aubl aumentan en época de lluvia.</p><p><strong>Space-time Variation of Aquatic Vascular Plants in Complex Low Swampy Sinú, Córdoba, Colombia</strong></p><p>The space-time variation of vascular aquatic vegetation was studied in Maria Arriba, San Sebastian, Purísima and Momil swamps of the lower Sinú swamp complex, located in the department of Córdoba (Colombia), covering hydrological periods occurred in one year. The area of study was divided in four sectors and by the linear intercept method it was determined the abundance and frequency of the hydrophytes. In each sector, a line of 200 m was extended perpendicularly to the coastline where located quadrants of 1m<sup>2 </sup>for each 50 m determined, the coverage and frequency of the different species. They were recorded 39659 individuals distributed in 24 families, 30 genus and 35 species. The highest abundance of species was presented in Momil with 18582 individuals being the family Lemnaceae the most representative. The analysis of variance (ANOVA) shows that not exist statistically significantly different in the abundance of the species of aquatic plants from sampling months (F=1,04; GL=11; <em>p</em>= 0,083), however, it has demonstrated the incidence of a hydrological period on the plants  dynamic growth,  some species disappear in dry season, others survive for  a short period of time, while others like  <em>Lemna minor </em>L. y <em>Salvinia auriculata</em>  Aubl. increase  in the rainy season. <strong></strong></p>

ON TIME VARIATION OF FUNDAMENTAL CONSTANTS IN SUPERSTRING THEORIES

1988 ◽  
Vol 03 (03) ◽  
pp. 243-249 ◽  
Author(s):  
KEI-ICHI MAEDA
Keyword(s):  
String Theory ◽  
Symmetry Breaking ◽  
Time Variation ◽  
Susy Breaking ◽  
Internal Space ◽  
Fundamental Constants ◽  
Breaking Mechanism ◽  
Dimensional Gravity ◽  
Superstring Theories ◽  
String Theories

Assuming the action from the string theory and taking into account the dynamical freedom of a dilaton and its coupling to matter fluid, we show that fundamental ‘constants’ in string theories are independent of the ‘radius’ of the internal space. Since the scalar related to the ‘constants’ is coupled to the 4-dimensional gravity and matter fluid in the same way as in the Jordan-Brans-Dicke theory with ω=−1, it must be massive and can get a mass easily through some symmetry breaking mechanism (e.g. the SUSY breaking due to a gluino condensation). Consequently, time variation of fundamental constants is too small to be observed.

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