scispace - formally typeset
Search or ask a question
JournalISSN: 2224-719X

Advances in Physics Theories and Applications 

About: Advances in Physics Theories and Applications is an academic journal. The journal publishes majorly in the area(s): Density functional theory & Nusselt number. It has an ISSN identifier of 2224-719X. Over the lifetime, 473 publications have been published receiving 1387 citations.


Papers
More filters
Journal Article
TL;DR: In this article, the authors performed experiments with hot mineral and seawater from Bulgaria, and water with varrying content of deuterium using IR-spectroscopy (NES-, and DNES-method).
Abstract: Three factors as isotopic composition, the temperature and pH value of water were analyzed in experiments with prognosis of primary hydrosphere and possible conditions for origin of first organic forms in hot mineral water. For this aim the authors performed experiments with hot mineral and seawater from Bulgaria, and water with varrying content of deuterium using IR-spectroscopy (NES-, and DNES-method). As model systems were used cactus juice of Echinopsis pachanoi and Mediterranean jellyfish Cotylorhiza tuberculata . There were discussed the reactions of condensation and dehydration occuring in alkaline aqueous solutions at 65–95 0 C and ?? = 9–10, resulting in synthesis from separate molecules larger organic molecules as polymers and short polipeptides, as well as were predicted the possible mechanisms of the deuterium accumulation in form of HDO in hot water. It was shown that hot alkaline mineral water with temperature from +65 0 C to +95 0 C and pH value from 9 to 11 is more suitable for the origination of life and living matter than other analyzed water samples. The pH value of seawater on contrary is limited to the range of 7.5 to 8.4 units. Two common local maximums were observed in the IR-spectra of jellyfish and seawater, which were more pronouncedly expressed in IR-spectra of jellyfish. In hot mineral waters the local maximums in the IR-spectrum are more manifested compared to the local maximums obtained in IR-spectrum of the same water at a lower temperature. The difference in the local maximums from +20 0 C to +95 0 C at each 5 0 C according to Student t-criterion – p < 0.05. These data indicate that the origination of life and living matter depends on the structure and physical chemical properties of water, as well as its temperature and pH value. Keywords : deuterium, hydrosphere, evolution, origin of life, IR-spectroscopy.

109 citations

Journal Article
TL;DR: Evaluation of possible biophysical methods and approaches for registering various non-ionizing radiation (NIR) wave types of the human body in the electromagnetic range helps understand in general how electromagnetic radiation interacts with water and establishes the structural alterations of water.
Abstract: This paper presents the results of evaluation of possible biophysical methods and approaches for registering various non-ionizing radiation (NIR) wave types of the human body in the electromagnetic range. Many types of NIR (electromagnetic waves, infrared radiation, thermo radiation, bioluminescence) emitted from the human body were reviewed. In particular the results of spontaneous biophoton emission and delayed luminescence from the human body are submitted along with i nfrared thermography (IRT) results. It was shown that 1 cm 2 of skin generally emits ~85 photones for 1s. The intensity of biophoton emission ranges from 10 ?19 to 10 ?16 W/cm 2 (approx. ~1–1000 photons . cm -2. s -1 ). The specific photon emission from part of the human thumb was detected as a spectrum of various colours with the method of Color coronal spectral analysis on a device with an electrode made ??of polyethylene terephthalate (PET hostafan) with applied electric voltage of 15 kV, electric impulse duration 10 ms, and electric current frequency 15 kHz. It was established that photons corresponding to a red color emission of the visible electromagnetic spectrum have energy at 1.82 ?V. The orange color of the visible electromagnetic spectrum has energy at 2.05, yellow – 2.14, blue-green (cyan) – 2.43, blue – 2.64, and violet – 3.03 eV. The reliable result measurement norm was at E ? 2.53 eV, while the spectral range of the emission was within 380–495 nm and 570–750 nm±5 nm. Some important physical characteristics were also demonstrated (energy of hydrogen bonds, wetting angle, surface tension) of water by the methods of non-equilibrium energy (NES) and differential non-equilibrium energy (DNES) spectrum of water, that helps understand in general how electromagnetic radiation interacts with water and establishes the structural alterations of water. Keywords: electromagnetic waves, infrared radiation, thermo radiation, bioluminescence, color coronal spectral analysis, NES, DNES

76 citations

Journal Article
TL;DR: In this paper, the authors studied the composition and structural properties of amorphous, uncrystallized, fullerene analogous carbon containing natural mineral shungite from Zazhoginskoe deposit in Karelia (Russian Federation) and microporous crystalline aluminosilicate mineral zeolite (Most, Bulgaria).
Abstract: We studied the composition and structural properties of amorphous, uncrystallized, fullerene analogous carbon containing natural mineral shungite from Zazhoginskoe deposit in Karelia (Russian Federation) and microporous crystalline aluminosilicate mineral zeolite (Most, Bulgaria). There are submitted data about the nanostructure, obtained with using of transmission electron microscopy (TEM-method), IR-spectroscopy (NES and DNES-method), as well as composition and physical chemical properties of these minerals. The average energy (?E H... O ) of hydrogen ?…O-bonds among individual molecules H 2 O after treatment of shungite and zeolite with water is measured at -0.1137 eV for shungite and -0.1174 eV for zeolite. The calculation of ?E H... O for shungite with using DNES method compiles 0.0025±0.0011 eV and for zeolite -1.2±0.0011 eV. This result suggests the restructuring of ?E H... O values among H 2 O molecules with a statistically reliable increase of local maximums in DNES-spectra. Also are demonstrated the prospects of using shungite, possessing high absorption, catalytic and bactericidal activity, as an adsorbent in water-treatment, water purification, and other industries. Keywords : shungite, zeolite, nanostructure, fullerenes, water treatment, water purification

59 citations

Journal Article
TL;DR: In this article, the effects of thermal radiation on the convective flow of a nanofluid past an impulsively started infinite vertical plate were analyzed using MATALB pde solver.
Abstract: In this study, we analyse the effects of thermal radiation on unsteady natural convective flow of a nanofluid past an impulsively started infinite vertical plate. The nanofluid contains heat treatable nickel chromium iron alloy (Nimonic 80A) nanoparticles with Ethylene Glycol as base fluid. The partial differential equations governing the flow are solved numerically by MATALB pde solver package. The effects of various parameters on velocity and temperature profiles, as well as Nusselt number and Skin friction coefficient are examined and presented graphically .It is found that rate of heat transfer increases by increase in thermal radiation and change of particle shape. Also we observed that the decrease in radiation parameter leads to fall the value of skin friction coefficient. Shape of nanoparticles doesn’t effects velocity of the fluid. Key Words: Heat transfer, Nanofluids, Thermal radiation, free convection, Volume fraction.

48 citations

Journal Article
TL;DR: The result of thermal distribution generated by handheld mobile phone towards human head via collection of image from thermal imaging camera showed an increased of heat especially at the place near the ear skull after 45 minutes of operation.
Abstract: Today, cell phone technology is an integral part of everyday life and its use is not only restricted to voice conversations but also conveying news, high resolution pictures and internet. As the number of mobile phone usage increased exponentially nowadays, issues related to the electromagnetic radiation produce by mobile phone is becoming a big concern in the society. Mobile phone produced electromagnetic waves and when placed near the ear skull, will produce electromagnetic radiation so called thermal effect. The transfer of electromagnetic field to the body producing thermal effect leads to heating of body tissue at specific rate. This effect is differ depending on the period of time the mobile phone being used and type of mobile phone. This paper discussed on the result of thermal distribution generated by handheld mobile phone towards human head via collection of image from thermal imaging camera. The analysis is conducted in an anechoic chamber with average of 45 minutes talking hour with two different types of mobile phone, internal and external antenna serving different radio frequency range, 900 MHz and 1800 MHz . The results showed an increased of heat especially at the place near the ear skull after 45 minutes of operation. When comparing both different types of mobile phone, mobile phone with external antenna produce more heat compared to mobile phone with internal antenna. Key words: Electromagnetic Radiation of 900 MHz and 1800 MHz Frequencies , Handheld Device, Thermal Effect, Non Thermal Effect

35 citations

Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
20233
20224
20212
202011
201922
201822