Space Science

In this paper an attempt is made to highlight and strengthen the inherent role of quantum gravity in cosmology. At any time, the product of cosmic ‘critical density’ and ‘critical Hubble volume’ can be called as the ‘critical mass’ of the evolving universe. By considering the Planck mass as the critical mass connected with big bang, Planck scale critical mass density and Hubble constant can be defined. Proceeding further, it can be suggested that, during evolution, cosmic thermal energy density may be directly proportional to critical mass-energy density. Observed redshift can be reinterpreted as a cosmological light emission phenomenon connected with cosmologically reinforcing hydrogen atom. To understand the ground reality of cosmic rate of expansion, accuracy of the current methods of estimating the magnitudes of current Hubble’s constant and current CMBR temperature must be improved.

In this work Doppler barding in measurements used to allow free Doppler absorption. The measurable velocity (m.s-1) was in the range of -5.2x107 to5.2x107. The maximum measurable velocity (m.s-1) was found to be limited by the signal-to-noise ratio. The intensity spectrum broadened linearly when velocity (m.s-1). At the same time, the spectral amplitude decreased and eventually approached the noise level. Increasing the laser power or improving the transducer sensitivity can extend the maximum. In contrast, the minimum measurable velocity (m.s-1) increased. Immediate, which represents the velocity sensitivity of the system, was limited by the frequency resolution of the system(-1.5x1014 Hz). Increasing the number of piezoelectric transducer cell (PZT) points can improve the minimum.

Is reality continuous or discrete ? As for the matter and the energy , both are composed of concrete elements : photons , electrons , molecules…Therefore it is pertinent to ask whether spacetime is made of any type of discrete , elementary ingredients . A preliminary approach to this issue is presented . It consists of numerical and geometric equivalences. The introduction of few parameters will help us to analyze some physical and cosmological subjects.

Seismic wave propagation through acoustic medium allows us to understand response through a fluid saturated medium. This interaction has been described by the acoustic wave equation. In this work, the acoustic wave equation was written in coupled form and was discretized using the staggered grid finite difference (SGFD) method, which provides improved accuracy and efficiency of the numerical modeling and are naturally centered at the same point in space and time. To truncate artificial reflections from our computational boundary, we have applied the perfectly matched layer (PML) absorbing boundary condition. Our results show seismic wave propagating through a homogeneous medium and the effect of PML was clearly observed.

In this paper we would like to explore observations of solar wind in both the polar and equatorial regions simultaneously at the same time during 23rd solar maximum, in order to compare the similarities and differences in solar wind between two regions. The observed period roughly coincides with polarity reversal phase. The comparative study relates polar and equatorial solar wind using observed data. The polar wind has been extensively investigated by Ulysses, the first spacecraft to perform in-situ measurements in the high-latitude heliosphere and ecliptic solar wind was observed by ACE were used to examine solar wind parameters. The solar wind parameters – temperature, density, speed and solar magnetic field are taken for evaluation. This study elucidates the solar wind variations in equatorial, southern and northern hemisphere in maximum phase. Both slow and fast solar winds are characterized in southern polar hemisphere but fast wind is prevails in northern polar hemisphere. Key words: Solar wind parameters, solar maximum code: EIJAPX 2017

This article is based on the theory of vortex gravitation and physical anomaly of the Earth - slowing its rotation. Defined orbital acceleration, increase in weight, the approach to the Sun, the age of our planet and the origin of planetary material.

We have studied the relationship between suicide in Slovakia and various Solar, Interplanetary and Geomagnetic Activity parameters, such as Sunspot Numbers (SSN), Solar Flare Index (SFI), Sudden Storm Commencements (SSC), and planetary Ap, Kp and Dst Indices observed during the period of 1986 to 2010. The data shows that the number of deaths due to suicide of males and females is well correlated with the yearly mean of Sunspot Numbers (SSN), Solar Flare Index (SFI), Sudden Storm Commencements (SSC), and planetary Ap, Kp and Dst Indices. We have calculated a large positive correlation, with correlation coefficients of 0.72, 0.64, and 0.62, between the yearly total number of male deaths due to suicide and the Planetary Kp, Ap, and Dst (magnitude) Indices. In addition, we have found a large negative correlation, with correlation coefficients -0.77, -0.68, and -0.60, between the yearly total number of female deaths due to suicide and the Planetary Kp, Ap, and Dst (magnitude) Indices. A large positive correlation, with a correlation coefficient of 0.60, and a good medium positive correlation, with correlation coefficient 0.57, has been found between the yearly total number of male deaths due to suicide and the yearly mean of the SSN and SFI. A good medium negative correlation, with correlation coefficients -0.49 and -0.40, has been found between the yearly total number of female deaths due to suicide and the SSN, SFI. From the statistical analysis of sudden storm commencements (SSC), and death due to suicide, we have obtained a positive correlation, with correlation coefficient of 0.51, between the yearly total number of male deaths due to suicide and Sudden Storm Commencements (SSC), as well as a negative correlation, with a correlation coefficient of -0.38, between the yearly total number of female deaths due to suicide and Sudden Storm Commencements (SSC).

A dusty plasma system containing non-thermal ion distributions, Boltzmann-distributed electrons and mobile charge fluctuating positive dust has been considered. The nonlinear propagation of the dust-acoustic (DA) waves in such dusty plasma has been investigated by employing the reductive perturbation method to derive the Burgers equation. The effect of non-thermal ions on the height and thickness of DA shock waves are also studied.

Humanistic education can build students’ humanistic literacy which including freedom of thought, moral autonomy and personal authenticity. In higher physics education, both science literacy and humanistic literacy should be developed. The higher physics education can enhance the blend of scientific education and humanistic education, and promote the harmonious development between scientific literacy and humanistic literacy.

The aim of this study is to detect Total Electron Content (TEC) anomalies before (Mw=7.0) Haiti earthquake on 12 Jan 2010. Three earthquake-associated TEC anomalies appear at 15:00, 20:00 and 22:00 on 11 Jan 2010 (UTC), 1 day before this earthquake. The analysis results are examined using a mathematical tool called Principal Component Analysis (PCA). After more detailed analysis using PCA, each of three TEC anomalies lasts about 30 minutes.