Volume 2 Issue 1

Authors: A. Goswami; V.M. Datar; B.M. Jyrwa; T.N. Nathaneil; H. Naik; S.V. Suryanarayana; R. Acharya; B.S. Shivashankar; Sylvia Badwar; Reetuparna Ghosh

Abstract: Elemental analysis of potassium and magnesium in the glass sample with reference to IAEA standard has been carried out simultaneously by using neutron activation and off-line gamma ray spectrometric technique. The amount of potassium and magnesium in the glass sample was also obtained from the composition of glass sample given by the supplier and compared with the experimental value of the present work. It was found that the experimental value for magnesium is in good agreement with the theoretical value. However, in the case of potassium the experimental value is around ten times higher than the theoretical value. Reason for this discrepancy has been investigated.

Keywords: Neutron Activation Analysis; off Line Gamma-Ray Spectrometry; Float Glass Sample; Potassium and Magnesium Estimation; IAEA Reference Standard

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Authors: LEI Hai-feng; GUO Cheng; WANG Jian-hong; HU Man-li; WANG Yong; WANG Shan-li

Abstract: A new style of FBG vibration sensor with a special structure of metal three-legged stand and elastic cantilever is designed for many low-frequency tests of engineering structures and mechanical systems. It can work with a wide band, zoom in vibrating signal and increase sensitivity. And mathematical model of vibration sensor is established. Furthermore, natural frequency, sensitivity, distortion factor, horizontal anti-jamming capability of sensor were measured. Experimental results show that to detect vibrations below 75Hz is entirely feasible, with FBG vibration sensor designed. And its natural frequency is about 100 HZ, frequency range is 75 Hz, the resolution of amplitude is 0.3 nm/mm, sensitivity is 28.5 pm/m.s-2.

Keywords: Fiber Bragg Grating (FBG); Vibration Sensor; Demodulation

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Authors: Rajeev Kumar Khare; Anand Shankar Dubey; Anirudh Pradhan

Abstract: The present study deals with cosmological models of FRW universe in presence of bulk viscous fluid source in the scale-covariant theory of gravitation formulated by Canuto et al. [Phys. Rev. Lett. 39:429, 1977]. A new class of solutions for the modified Einstein’s field equations is obtained by considering time dependent deceleration parameter. It is observed that the models are accelerating at present epoch. Some physical aspects of the models are also discussed in this paper.

Keywords: FRW Universe; Variable Deceleration Parameter; Scale-Covariant Theory; Accelerating Models

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Authors: Igor Schepotin; Sergey Lukin; Anatoliy Burlaka; Marina Tselepi; Crispin Barnes; Andriy Romanov; Thanos Mitrelias; Valerii Orel; Anatoliy Shevchenko

Abstract: An impressive increase in the survival rates of rats infected with Guerin carcinoma has been demonstrated, following the injection of complex magnetic nanoparticles (abbreviated as MCN) to induce hyperthermia and targeted drug delivery. Here, we present the latest developments in our technology for the synthesis of MCN comprising magnetite nanoparticles Fe3O4 and molecules of the anticancer drug anthracycline antibiotic doxorubicin (DR) with KCl. MCN were synthesized in a mechanic reactor with magnetic elements, by magneto-mechano-chemical dry synthesis. DR and its nanocarrier Fe3O4 with KCl were subjected to mechanical activation. It is demonstrated that under the influence of mechano-chemical and magneto-mechano-chemical synthesis of the MCN, the concentration of paramagnetic centers increased. In pilot preclinical studies we showed that following the injection of the MCN synthesized by our methods, into rats with Guerin carcinoma subjected to external electromagnetic radiation, the survival rates increased by 25% as compared to the treatment with conventional DR alone.

Keywords: Magneto-Mechano-Chemical Synthesis; Reactor; Magnetic Nanoparticles; Magnetic Moment; Paramagnetic Centers; Free Radicals; Doxorubicin; Guerin Carcinoma

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Authors: Thomas Varghese; Mohammed E M; Smitha Thankachan; Sunny Joseph; Priyanka K P

Abstract: Nanocrystalline TiO2 with different particle sizes was prepared by a low temperature sol-gel synthesis route. The particle sizes were determined through X-ray diffraction technique. The dielectric properties of nanocrystalline TiO2 at different frequencies ranging from 20 Hz to 20 MHz have been studied over a temperature range 303 K-383 K. It is observed that the dielectric constant (ε’) and dielectric loss (tan δ) of all the samples decrease steeply as the frequency is increased and attains a constant lower value at high frequencies. The a.c. conductivity was derived from dielectric constant and loss tangent data. It has a low value at smaller frequencies, which increases as the frequency is increased.

Keywords: Nanotitania; Dielectric properties; A.c. conductivity

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Authors: Zheng-Chuan Wang

Abstract: Aspect et al.’s experiment[5] verified the violation of Bell inequality and the validity of quantum mechanics rather than local hidden-variables theory. In this manuscript, we will show that there exists difference between definitions for the expectation value using the probability distribution in Bell’s inequality and the expectation value in quantum mechanics. It is this difference that leads to the controversy between the expectation values in quantum mechanics and Bell’s inequality. The expectation values in quantum mechanics should obey their own inequality.

Keywords: Bell’s inequality; Expectation value; Local hidden-variables theory

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