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A Thorough Investigation of Electronic, Optical, Mechanical, and Thermodynamic Properties of Stable Glasslike Sodium Germanate under Compressive Hydrostatic Pressure: Ab Initio Study

2024-06-20T05:15:01Z

Title: A Thorough Investigation of Electronic, Optical, Mechanical, and Thermodynamic Properties of Stable Glasslike Sodium Germanate under Compressive Hydrostatic Pressure: Ab Initio Study Authors: Pachuau, Lalrinthara Abstract: In this paper, we have tried to elucidate the variation of structural, electronic, and thermodynamic properties of glasslike Na2GeO3 under compressive isotropic pressure within a framework of density functional theory (DFT). The result shows stable structural (orthorhombic → tetragonal) and electronic (indirect → direct) phase transitions at P ∼ 20 GPa. The electronic band gap transition plays a key role in the enhancement of optical properties. The results of the thermodynamic properties have shown that Na2GeO3 follows Debye’s lowtemperature specific heat law and the classical thermodynamic of the Dulong−Petit law at high temperature. The pressure sensitivity of the electronic properties led us to compute the piezoelectric tensor (both in relaxed and clamped ions). We have observed significant electric responses in the form of a piezoelectric coefficient under applied pressure. This property suggested that Na2GeO3 could be a potential material for energy harvest in future energy-efficient devices. As expected, Na2GeO3 becomes harder and harder under compressive pressure up to the phase transition pressure (∼20 GPa) which can be read from Pugh’s ratio (kH) > 1.75, however, at pressures above 20 GPa kH < 1.75, which may be due to the formation of fractures at high pressure

Health Effects of High And Low Power Densities of Mobile Phone Tower Radiation On Nearby Inhabitants – Case Study

2024-06-19T06:04:08Z

Title: Health Effects of High And Low Power Densities of Mobile Phone Tower Radiation On Nearby Inhabitants – Case Study Authors: Pachuau, Lalrinthara Abstract: In the present paper, we presented the study of complaints on thirteen (13) different health symptoms faced by inhabitants living near mobile tower – Global System for Mobile Communication (GSM 900) and those inhabitants living in the area where there is no mobile tower. The study was conducted in two different localities in Aizawl city in the year 2014. For the study, questionnaires were conducted in both the localities. Power densities were measured in different places in both the localities. Frequency spectrum was taken in each locality. Health complaints between the two localities were compared. It was found that power density is much higher in the area where there is mobile tower than the area where there is no mobile tower. Inhabitants living near mobile tower are having more health complaints than those inhabitants living in the area where there is no mobile tower. Responses from inhabitants who participated in the questionnaires from both the localities were statistically analysed and compared by performing Kruskal Walli’s t-test. Out of the thirteen (13) different symptoms studied it was found that the comparisons are statistically significant with p < 0.05 in four (4) symptoms. Women were statistically more affected (p < 0.05) than male in headache and muscle pain.

Health Effects of Mobile Tower Radiation on Human — Case Study

2024-06-19T05:59:47Z

Title: Health Effects of Mobile Tower Radiation on Human — Case Study Authors: Pachuau, Lalrinthara Abstract: In the present paper, we presented the study of complaints on thirteen (13) different health symptoms faced by inhabitants living near mobile tower – Global System for Mobile Communication (GSM 900 & 1800) and those inhabitants living in the area where there is no mobile tower. The study was conducted in fourteen different localities in Aizawl city and four different localities outside Aizawl city in the year 2014 & 2015. Questionnaires were conducted in all the localities. Power densities were measured in different places in all the localities. Health complaints between the localities were compared with that of the locality where there is no mobile tower. It was found that power density is much higher in the area where there is mobile tower than the area where there is no mobile tower. Questionnaire responses from all the localities were statistically analysed and compared by performing t-test. Out of the thirteen (13) different symptoms studied it was found that the comparisons are statistically significant with p < 0.05 in six symptoms. Significant Health complaints start to occur when average power density of the locality is more than 2.145 mW/m2. Women were statistically more affected (p < 0.05) than male. It was found that there was strong positive correlation between power density and health complaints with R2 value 0.853