IOSR-JAP   Volume-12 ~ Issue-2 ~ Mar. – Apr. 2020

ABSTRACT:The present study reveals with study of electrical, thermal and optical band gap of polypyrrole filled PVC: PMMA thin films themoelctrets. Conducting polymer composites have attracted considerable interest in
recent years because of their numeric applications in variety of electric and electronic devices. Polypyrrole has been regarded as one of the most studied conducting polymers because of its physical and electrical properties
that have led to several applications such as solid-state devices and electronics. The electrical conductivity of polypyrrole filled PVC: PMMA thermoelectrets have been studied. Electret effects in polymers can be produced
by orientation of dipoles and /or trapping of charge carriers injected from electrodes as well as generated in the bulk of polymers. It has been shown by thermally stimulated discharge conductivity technique (TSDC) that
the characteristics of electrets....

Keywords: TSDC, Thermoelectrets, Optical band gap, Polypyrrole, TGA/DSC.

[1]. A. Kassim, M.Sagadavan, F.Adzmi, H.N.H. Mahmud Ekramul, Materials Science, 10, (2004) 255.
[2]. Das, B., Kumar, S., Chakraborty, S., Chakraborty, D., Gangopadhyay, S.J. Appl. Polym. Sci. 1998. 69: 841–844.
[3]. N. C. Greeham, S. C. Moratti, D. D. C. Bradley, R. H.Friend, A. B. Holmes, Nature 365, (1993), 628.
[4]. M. Kobayashi, N. Colaneri, M. Boysel, F. Wudl, A. J. Heeger, J. Chem. Phys. 82, (1985), 717.
[5]. V. Sangawar., P. Chikhalikar J., R. Dhokane, A. Ubale, S. Meshram Acta Ciencia, 4, (2006), 477.

ABSTRACT: The theory of relativity is very important to atomic and nuclear physics. Hence, it needs to be examined quite thoroughly, considering relativistic kinematics, or the relativity of space and time (spacetime) and subsequently considering relativistic dynamics, or the relativity of momentum and energy. This paper addresses some challenges and issues regarding those conjecture-based postulates and their consequences

[1]. Feynman, R.P. (1970), "21–6. The potentials for a charge moving with constant velocity; the Lorentz formula", The Feynman Lectures on Physics, 2, Reading: Addison Wesley Longman, ISBN 0-201-02115-3
[2]. Nafish Sarwar Islam, "Mathematical Sanctity of the Golden Ratio"; IOSR Journal of Mathematics (IOSR-JM), e-ISSN: 2278-5728, p-ISSN: 2319-765X. Volume 15, Issue 5 Ser. II (September – October 2019), PP 57-65.
[3]. Nafish Sarwar Islam, "The Golden Ratio: Fundamental Constant of Nature"; Publication date 04 Nov 2019 Publisher LAP Lambert Academic Publishing, ISBN10 6139889618, ISBN13 9786139889617
[4]. Nafish Sarwar Islam, "Preface to cosmological constant"; IOSR Journal of Applied Physics (IOSR-JAP), e-ISSN: 2278-4861, Volume 12, Issue 1 Ser. II (January – February 2020), PP 01-24.
[5]. Nafish Sarwar Islam, "The Golden Ratio"; IOSR Journal of Applied Physics (IOSR-JAP), e-ISSN: 2278-4861, Volume 12, Issue 2 Ser. II (March – April2020), PP 36-57

ABSTRACT: Background: The cirrus ice nuclei characteristics and its effect on the optical properties were investigated from the National Atmospheric Research Laboratory (NARL; 13.50N, 79.20E), Gadanki, Andhra Pradesh, India, an inland tropical station during the period of observation January 2009 to December 2010. From the observations the cirrus ice nuclei characteristics such as effective radius (Re), ice water content (IWC), ice water path (IWP), ice nuclei concentration (INC), ice crystal fall velocity (Vm) were studied. The variation of these tropical ice nuclei properties with mid cloud temperature were also studied. The present study may be useful in predicting the......

Key Word: Lidar; Radar; Ice nuclei; Fall velocity; Cirrus

[1]. Heymsfield, A. J., and G. M. McFarquhar, Mid-latitude and tropical cirrus: Microphysical properties, in Cirrus, edited by D. Lynch et al., Oxford Univ. Press, New York. 2002; pp. 78 – 101.
[2]. Stephens, G.L., Tasy, S.C., Stackhouse, P.W., Flatau, P.J., The relevance of the microphysical and radiative properties of cirrus clouds to climate and climatic feedback, J. Atmos. Sci., 1990; 47, 1742-1753.
[3]. Chen, T., Rossow, W.B., Zhang, Y., Radiative effects of cloud-type variations, J. Clim, 2000; 13, 264-286.
[4]. Intergovernmental Panel on Climate Change (IPCC) Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 2013; 1535 pp.
[5]. Fu, Q., An accurate parameterization of the solar radiative properties of cirrus clouds for climate models, J. Climate, 1996; 9, 2058–2082.

ABSTRACT: Here in this paper we will review and revise the ancient Greek methods of calculating distance to the sun and distance to the moon from earth..

[1]. Heath, Thomas (1913). Aristarchus of Samos, the Ancient Copernicus. Oxford: Clarendon. p. 323.
[2]. Berggren and Sidoli. 2007. 'Aristarchus's On the Sizes and Distances of the Sun and the Moon: Greek and Arabic Texts'. Arch. Hist. Exact Sci. 61(3), pp. 213–54. DOI: 10.1007/s00407-006-0118-4
[3]. Noack B. (1992) Aristarch von Samos: UntersuchungenzurÜberlieferungsgeschichte der SchrifΠερὶμεγεθῶν καὶ ἀποστημάτωνἡλίοσ καὶ σελήνης, Wiesbaden.
[4]. Berggren, J. L. & N. Sidoli (2007) "'Aristarchus's On the Sizes and Distances of the Sun and the Moon: Greek and Arabic Texts', Archive for History of Exact Sciences, Vol. 61, no. 3, 213–254" (PDF). Archived from the original on April 28, 2011. Retrieved 2011-11-07

ABSTRACT: This paper is all about golden ratio Phi =.

[1]. Nafish Sarwar Islam, "Mathematical Sanctity of the Golden Ratio"; IOSR Journal of Mathematics (IOSR-JM), e-ISSN: 2278-5728, p-ISSN:2319-765X. Volume 15, Issue 5 Ser. II (September – October 2019), PP 57-65.
[2]. Nafish Sarwar Islam, "The Golden Ratio : Fundamental Constant of Nature"; Publication date 04 Nov 2019 Publisher LAP Lambert Academic Publishing, ISBN10 6139889618, ISBN13 9786139889617

ABSTRACT: The survey electrical resistivity mapping for intrusive rock in Lekwesi Community in Umuneochi,LGA,Abia state, Nigeria. The sole aimed of the survey was carried out to detect the presence of intrusive rocks in the community and its environs. The study area is underlain by the Benin formation which is within the Niger – Delta Basin. The survey (Vertical Electrical Sounding) was conducted at twelve (12) different locations using the Schlumberger array with a maximum electrode separation of AB/2 = 90m. after adequate and proper connection of the equipments involved in survey followed by the normal spread, the survey conducted and the data....

Key Word: Intrusive Rocks; Overburden Thickness; Resistivity; Schlumberger array, vertical electrical sounding..

[1]. Reyment, R.A, Aspect of Geology of Nigeria Ibadan University press, 56 – 63, (1965)
[2]. Koefoed O, Geosounding principles, resistivity sounding measurement (nertherland, Elsvier scientific publishing company, 1979).
[3]. Obiora and Umeji, petrography of some altered intrusive rocks from the lower Benue Rift; Journal of mining and Geology Vol. 41, 2005, No 1, pg 1- 8
[4]. Abam TSK and Ngah S.A Evaluation of sub – soil geo – electric properties in A proposed power sub – station site AtEbubu, rivers state, Nigeria – Tks Aba mint. Journal of engineering research and application 4 (9), 2014, 45 – 52
[5]. Udo, R.K, the Geographical regions of Nigeria, Heinemann educational books, London and university of califonia press, 1970, 232 pages 2.