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• Open Access   Article

  Oblique Electromagnetic Ion Cyclotron Instability with A.C. Electric field for Loss-cone Distribution Function

  J. Kumari, R. S Pandey, G Varughese, K. M Singh

  Research Paper | Isroset-Journal (IJSRPAS)

  Vol.5 , Issue.4 , pp.1-12, Aug-2017

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  Electromagnetic ion cyclotron (EMIC) waves play an important role in magnetospheric dynamics and their global distribution has been of great interest. In this paper, the effect of cold plasma injection on oblique propagating Electromagnetic Ion Cyclotron waves in the presence of A.C electric field due to distribution of hydrogen ions in a background plasma having bi-maxwellian and also loss-cone distribution function has been examined in the magnetosphere of Earth. In these cases the effect of cold plasma injection and other parameters have been compared. Applying kinetic approach, expression for dispersion relation and growth rate has been derived. It is found that the A.C frequency has profound effect on growth rate for both bi-maxwellian and loss cone distribution. Growth rate increases with increase in the A.C. frequency. Increase of temperature anisotropy also increases the growth rate, thus it can be concluded that the source of free energy for this instability is not only temperature anisotropy but also A.C. field frequency. There is marginal decrease in growth rate with increase in angle of propagation for bi-maxwellian distribution but for loss cone distribution, growth rate increases significantly. The ratio of cold injected plasma to background plasma (nc/nw) reduces the growth rate.

  Key-Words / Index Term
  Magnetosphere of Earth, Ion-cyclotron waves, Cold Injection, Loss cone distribution Functions

  References
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  Citation
  J. Kumari, R. S Pandey, G Varughese, K. M Singh, "Oblique Electromagnetic Ion Cyclotron Instability with A.C. Electric field for Loss-cone Distribution Function," International Journal of Scientific Research in Physics and Applied Sciences, Vol.5, Issue.4, pp.1-12, 2017

• Open Access   Article

  Deformation Consequences in Super Heavy Elements

  J. Umai Parvathiy

  Research Paper | Isroset-Journal (IJSRPAS)

  Vol.5 , Issue.4 , pp.13-16, Aug-2017

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  Abstract
  The Search for new super heavy elements is at present one of the most exciting adventures in the field of nuclear physics. Majority of super heavy elements are identified through alpha decay chain since many nuclei in the super heavy region are expected to decay mainly by alpha emission. Alpha decay is a unique tool to study the properties of a nucleus which assists for the experimental studies of super heavy nuclei, as it makes their identification easier. In order to investigate such alpha decay half-life times of super heavy nuclei, Cubic plus Yukawa plus Exponential (CYE) model in the Trans-Actinide region ranging from Z = 104 to 121. This model uses a cubic potential in the over-lapping region connected by a Yukawa plus Exponential potential in the post – scission region. Apart from using this potential CYE model has more virtues, for instance inclusion of zero point vibration energy. Such a model is enhanced further by incorporating the consequence of deformation of the decay parent and the daughter nucleus. This can cause longevity and stability of super heavy nuclei. The expected long lived super heavy nuclei provide the physicists to have an extensive study about the properties of super heavy elements. In this work by using CYE model the alpha decay half-lives of Super heavy nucleus including the effect of nuclear deformation is analyzed.

  Key-Words / Index Term
  Alphadecay ,Deformation, Half–lives, Super heavy elements

  References
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  J. Umai Parvathiy, "Deformation Consequences in Super Heavy Elements," International Journal of Scientific Research in Physics and Applied Sciences, Vol.5, Issue.4, pp.13-16, 2017

• Open Access   Article

  Structure and Magnetic Studies of Cobalt Nanoparticles Prepared by Modified Polyol Process

  G. Chandraprabha, T. Sankarappa, T.Sujatha

  Research Paper | Isroset-Journal (IJSRPAS)

  Vol.5 , Issue.4 , pp.17-20, Aug-2017

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  Abstract
  Cobalt nanoparticles were prepared by following the modified polyol process. The reduction of cobalt salt was carried out using hydrazine hydrate. The x-ray diffraction pattern of the as prepared cobalt sample revealed amorphous nature and annealed particles exhibited crystallinity. Crystallite sizes were determined using Debye Scherrer equation. Surface morphology has been investigated using Scanning Electron Microscopy (SEM). Average particle size estimated from SEM image was 32 nm. Magnetic properties of the as prepared particles were studied at 10K and 300K in a SQUID magnetometer. A slight decrease in saturation magnetization and appreciable decrease in coercive field has been noted as the temperature was increased from 10K to 300K. These results were discussed in view of existing literature.

  Key-Words / Index Term
  Cobalt, nanoparticles, XRD, SQUID, magnetization

  References
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  Citation
  G. Chandraprabha, T. Sankarappa, T.Sujatha, "Structure and Magnetic Studies of Cobalt Nanoparticles Prepared by Modified Polyol Process," International Journal of Scientific Research in Physics and Applied Sciences, Vol.5, Issue.4, pp.17-20, 2017

• Open Access   Article

  Impact of Lighter Ion Concentration on Entry Flow in a Multiple Ion-Species Plasma Sheath

  Prabhat Dubey, Nishchhal Yadav, Devendra Sharma

  Research Paper | Isroset-Journal (IJSRPAS)

  Vol.5 , Issue.4 , pp.21-23, Aug-2017

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  Abstract
  In many modern application of positive and negative ion sources, ranging from fusion plasma experiments to surface processing of materials by plasma, substantial increase in efficiency is observed achievable by using complex mixtures of neutral species to generate the source plasma. In the present study we obtain and characterize entry flow combinations from the linear dispersion of the a collisional multispecies plasma, as a function of lighter species’ concentration. The entry flow velocity, normalized to acoustic velocity of one the species, shows critical variation in the entry flow velocity of the relatively heavier species whose acceleration is desired by using a mixed concentration of ions in the source plasma.

  Key-Words / Index Term
  Multiple Ion-Species, Finite Sheath Dimensions, Plasma

  References
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  Citation
  Prabhat Dubey, Nishchhal Yadav, Devendra Sharma, "Impact of Lighter Ion Concentration on Entry Flow in a Multiple Ion-Species Plasma Sheath," International Journal of Scientific Research in Physics and Applied Sciences, Vol.5, Issue.4, pp.21-23, 2017

• Open Access   Article

  National Telecommunication and Information Administration (NTIA): The Promoter of Digital Humanities and Sociology-A Case Study

  P.K. Paul, P.S. Aithal, A. Bhuimali, Krishna Raj

  Research Paper | Isroset-Journal (IJSRPAS)

  Vol.5 , Issue.4 , pp.24-27, Aug-2017

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  Abstract
  National Telecommunication and Information Administration (NTIA) is a prominentnodal agencyin the United States which is under the Department of Commerce which is responsible for the technological innovation and promotion of digital innovation for economic development in the US and other countries.It is associated with many other internet and information infrastructure and networks of related associations which include the ISOC, RIR, ICANN, IETF, IGF and also other non-profit making internet and technology related organization such as IEEE, ACM. This plays an executive role principally responsible and dedicated to the telecommunication and other information related policy matters. This paper aims to overviewthe aims, objectives and function of the National Telecommunication and Information Administration (NTIA) with a paradigm shift in the telecommunication and information technology policy towards economic growth with an analysis ofthe past and present activities.This paper also highlights the structure and activities which are aimed at realizing digital innovation and economic growth.

  Key-Words / Index Term
  National Telecommunication and Information Administration, NTIA, Telecommunication Policies, Development, Information Policies, IT, Knowledge Management, Internet Governance, Information Infrastructure, United States

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  Citation
  P.K. Paul, P.S. Aithal, A. Bhuimali, Krishna Raj, "National Telecommunication and Information Administration (NTIA): The Promoter of Digital Humanities and Sociology-A Case Study," International Journal of Scientific Research in Physics and Applied Sciences, Vol.5, Issue.4, pp.24-27, 2017