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Krithiga V.G.,Meenakshi Sundararajan Engineering College
International Journal of Applied Engineering Research | Year: 2015

Social Media is very popular these days and the rate at which data is loaded in it is also very high. To get some information we use social media. But the amount of information we get from it is very high and it is a clutter. To enable useful data extraction we propose a system which uses Twitter as its source for data and does processing using ETL. The Extraction of data from twitter is done effectively,the Transformation of data that is extracted is done in which business rules are applied. Data cleansing involves duplicate removal. The Load of modified data is done into Hive followed by Transformation. This data extracted is then analysed for positive, negative and neutral sentiments. The trained classifier checks each sentence for positive, negative and neutral tweets. The result of this is saved and the file is used. The visualizations are generated based on the outcome and necessary axis is used for checking the outcome of whatever we require. © Research India Publications. Source

Murthy S.,Meenakshi Sundararajan Engineering College | Murthy S.,Sri Venkateswara College of Engineering | Murthy S.,Georgia Institute of Technology
Philosophical Magazine | Year: 2013

Thiol-derivatized gold nanoparticles have been prepared by the reduction of gold cations in an ethanol solvent in the presence of alkanethiols such as dodecanethiol and nonanethiol. Negative ion laser ablation time-of-flight mass spectra (LA-TOF-MS) of the as-prepared samples indicate the presence of a single predominant peak at around 30 kamu even for samples prepared using widely different gold to thiol molar ratios in the reactant mix. The preponderant observation of such nanoparticles in the mass spectra is attributed to a region of especially high thermodynamic stability existing in this mass range for negative ions derived from nanoparticles prepared from the Au-RSH material combine. These studies also support the assertion that the thiol-derivatized gold nanoparticles prepared by the method of Murthy et al. are qualitatively different than that prepared by the method of Brust et al. © 2013 Copyright Taylor and Francis Group, LLC. Source

An extensive study on the determination of the natural radioactivity ((238)U, (232)Th and (40)K) levels in soil samples of Chennai city, India has been undertaken and the results of the same are compared with the levels reported in other Indian cities as well as other parts of the world. The radioactivity content in the soil samples, the absorbed dose rate, annual effective dose equivalent, radium equivalent activity, internal and external hazard indices were calculated and compared with UNSCEAR 2000 recommended values. In addition to the above, mapping of indoor natural background gamma radiation levels has been made using thermo luminescent dosemeters throughout Chennai city and the same are reported. Source

Murthy S.,Meenakshi Sundararajan Engineering College | Murthy S.,Sri Venkateswara College of Engineering
Chemistry | Year: 2013

The Clapeyron equation specifies the variation of the pressure, P, with respect to the temperature, T, of a closed two-phase one component system at the phase boundary under conditions of thermodynamic equilibrium. Even though in the context of the traditional derivation of this equation (as presented in most books on undergraduate/ postgraduate Physical Chemistry or Thermodynamics), Gm,i (P, T) (where i = 1 and 2) curves are not presented, the derivation involves the consideration of two points on each of these curves subject to the condition that the two phases are in equilibrium with each other. Geometrically, this implies the separate movement from an initial to a final point (in the neighborhood of the initial point) on the two Gm,i (P, T) (where i = 1 and 2) curves which incidentally are congruent at the phase boundary. At first glance, however, it is not trivial to geometrically (graphically) visualize this movement from the equations that are presented in the tradiational derivation of the Clapeyron equation, thereby, possibly causing a certain amount of confusion. In the present work, a conceptually simpler and mathematically rigorous derivation of the Clapeyron Equation is presented where the quantity of interest that is considered is ?Gm(P,T) = Gm,1(P,T) - Gm,2(P,T). ?Gm(P,T) is equal to zero at the phase boundary and, thereby, d?Gm(P,T) is also equal to zero at the phase boundary. This key idea then makes it possible to focus on a single point in the ?Gm(P, T) curve that occurs at the phase boundary between the two phases in deriving the Clapeyron Equation and also to geometrically visualize the phase equilibrium situation. Source

Uday Kumar N.,Meenakshi Sundararajan Engineering College
9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium | Year: 2010

Housing, which is the basic infrastructure necessity for any nation, has been becoming a highly challenging task, not only for the developing countries, but also for the developed countries, due to rapidly fluctuating economic situations prevailing all across the globe. The worsening economic conditions are dumping millions of families to become home-less. In this context, apart from offering remedial economic packages, the governments have to come-out with innovative technical solutions of affordable disaster resistant housing, particularly for the displaced families. Geodesic dome homes are not new for North America. But, 'Ferrocement Geodesic Dome Shelter (FeGeDS)' is an innovative construction system, which provides not only affordable housing but also earthquake resistant homes. This type of housing is also effectively multi dimensionally disaster resistant, as they are fire resistant, cyclone resistant and flood resistant. Hence, this disaster resistant construction technology is also highly suitable for rehabilitation and reconstruction phase in post-disaster situations. The paper illustrates and projects FeGeDS construction as a simple technology with the combination of precast ferrocement panels and cast-in-situ assembling technique for the construction of earthquake resistant geodesic dome home. These ferrocement geodesic domes are highly durable and requires nominal maintenance, unlike conventional wooden / synthetic / plastic / fiber reinforced plastic (FRP) geodesic domes. As FeGeDS is built of a special type of concrete, known as ferrocement, they last for decades and even beyond a century, with minimum maintenance. This technology offers many advantages. The long list of advantages starts with economic, materialistic and labour related savings. Even the maintenance cost will be much lesser, when compared to other types of housing. All these economic advantages are brought-out in this paper. For this type of technology, the foundation required will be very simple, because its dead weight will be relatively very less, when compared to reinforced cement concrete (RCC) / masonry / steel buildings. The architectural advantages and structural advantages are highlighted. This paper also projects the FeGeDS not only as one of the green building technologies, but also as greenery promotion housing. The social acceptability for this geodesic dome type housing may not be a problem in the long run of time, say with in a period of few years. If, its very important advantages of affordability, durability, disaster resistance, green building concepts, etc., are intensively promoted by series of seminars, demonstrations and other relevant technical activities, its social acceptability may catch-up like a wild fire. More and more people may also exclusively like its geodesic shape. The only limitation with this type of dome is that, it can not be suitable for multistorey construction. Hence it is not recommended for urban housing, where the real-estate value of land may be very costly and thus multi-storey apartment housing only may be affordable. However it is highly relevant and most suitable for rural housing, where the land cost may be cheaper and the construction cost is to be economized without compromising on durability and the structural stability. Copyright © (2010) by Earthquake Engineering Research Institute. Source

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