http://nopr.niscair.res.in/handle/123456789/13288 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/13321 Title: Effect of electromagnetic radiation from mobile phones towers on human body <br/> <br/>Authors: Kumar, Sandeep; Pathak, P P <br/> <br/>Abstract: In the present paper, the elecrtromagnetic field (EMF) strength and specific absorption rate (SAR) have been calculated in close proximity to mobile phones base stations. The induced SAR inside human body tissues, particularly in fat and muscles due to mobile phone base station frequency (900 MHz) have been evaluated. The calculated values of SAR have been compared with standard limits given by various international authorities like Federal Communication Commission (FCC), International Radiation Protection Association (IRPA/INIRC), International Commission on Non-ionizing Radiation Protection (ICNIRP), Institute of Electrical and Electronics Engineers (IEEE), etc. <br/> <br/>Page(s): 340-342 http://nopr.niscair.res.in/handle/123456789/13320 Title: Modeling of rain drop size distribution for a tropical hot semi-arid site in India <br/> <br/>Authors: Jassal, B S; Vidyarthi, Anurag; Gowri, R; Shukla, Ashish K <br/> <br/>Abstract: <span style="font-size:11.0pt;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-US">Data on rain drop size distribution, collected at Ahmedabad, India, has been analysed to develop empirical model on drop size distribution (DSD). Out of the various DSD models available in literature, analysis has been done for lognormal distribution as it has been reported to be suitable for tropical regions. The empirical model has been derived on the basis of fit parameters evaluated from experimental data. It is observed that data fits well in lognormal distribution for Ahmedabad. </span> <br/> <br/>Page(s): 330-339 http://nopr.niscair.res.in/handle/123456789/13319 Title: GPS radio occultation observations of atmospheric heating associated with dust storm <br/> <br/>Authors: Sharma, Neerja; Mahalakshmi, D V; Gharai, Biswadip; Badarinath, K V S <br/> <br/>Abstract: The potential ability of GPS radio occultation (GPSRO) measurements to capture the atmospheric heating during dust storm event is highlighted in the present work. COSMIC 1-dvar temperature profiles were used to study the atmospheric heating mechanism associated with the dust storm that occurred in Arabian Peninsula during 2-3 February 2008. GPSRO temperature profiles could capture the temperature inversion layer in the troposphere during the active dust storms period. Though the sensitivity of GPSRO data in the lower troposphere is limited, it could show the impact of dust storm in modulating the temperature structure of the atmosphere. The magnitude of the temperature inversion observed from the temperature profiles at different locations in different days will be helpful to understand the amount of heat trapped in the troposphere. The results are also validated with the collocated radiosonde temperature profile available with GPSRO temperature data. <br/> <br/>Page(s): 320-329 http://nopr.niscair.res.in/handle/123456789/13318 Title: Time/level of ionospheric response to geomagnetic storm of 25-26 July 1981 at different latitudes <br/> <br/>Authors: David, T W; Akintola, A N; Adekoya, B J <br/> <br/>Abstract: The reaction of the ionosphere at different latitudes may be quite different during the same storm. In this light, this paper investigates time/level of response of the upper, mid and lower latitudes stations of two different regions to an intense geomagnetic storm. The parameters solar wind plasma and imbedded interplanetary magnetic field (IMF), and foF2 have been investigated. The data has been obtained from global network of ionosondes. The analysis of solar wind plasma show that the event on 25-26 July 1981 is a type 2 storm, i.e. the ratio of the magnitude of the second to first Dst (separated by at least 3 hours) decrease is less than 0.9. The analysis of the foF2 data shows that the depletion at the time of storm occurred at a greater percentage in the upper latitude than at the mid latitude, and very small at the lower latitudes. Furthermore, there was simultaneous depletion of foF2 at all latitudes. <br/> <br/>Page(s): 311-319