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Babai K.S.,Meenakshi Sundararajan Engineering College | Poongothai S.,Annamalai University | Lakshmi K.S.,Meenakshi College for Women | Punniyakotti J.,Meenakshi Sundararajan Engineering College | Meenakshisundaram V.,Bhabha Atomic Research Center
Journal of Radioanalytical and Nuclear Chemistry | Year: 2012

Indoor radon concentrations were measured inside different types of dwellings in Chennai city on a quarterly basis using a solid state nuclear track detector (LR-115, Type II) for 1 year. Significant seasonal variations were observed. The average highest radon concentration was observed during winter (86.08 Bq m -3) and the lowest in summer (42.50 Bq m -3). The radon concentrations were also varying on the basis of different floor-covering materials. For a given season, the average maximum radon concentration was observed with cement flooring (118.96 Bq m -3) followed by tiles (75.25 Bq m -3) and marbles (74.04 Bq m -3). Also, outdoor soil samples were collected in and around the same dwellings and determined the radioactivity content of three primordial radionuclides ( 238U, 232Th and 40K) in these soil samples using NaI(Tl) scintillation detector based gamma-ray spectrometer. © Akadémiai Kiadó, Budapest, Hungary 2012.

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.

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.

Bhat S.,Meenakshi Sundararajan Engineering College | Aishwarya K.,Meenakshi Sundararajan Engineering College
Proceedings of the 2013 International Conference on Advances in Computing, Communications and Informatics, ICACCI 2013 | Year: 2013

Recommender systems are Information systems that predict user preferences and present product/item/service recommendations that are personalized and subjective. These systems have been extant in the field of e-commerce and research extensively. Our work intends to introduce such a perceptive system to the field of healthcare. New drugs and their variants enter the market quite so often and keeping track of each of them is a tedious task. Hence, the usage of such new drugs is skewed. Our system aims at insightfully recommending the new drugs, thereby enlightening the medical community on the newest introductions to the market. The working flow follows the ensuing steps: Gather information on every drug that forays into the market based on criteria such as its generic name, brand name and the purpose it serves and also gather user information through a sign-up survey form; Employing item-based Top-N recommendation algorithm to compare and contrast search histories of users with a common background and determining item-item similarities based on product features; ultimately Top-N recommendations are then presented to the user. © 2013 IEEE.

Sridar S.,Meenakshi Sundararajan Engineering College | Subramanian K.,Meenakshi Sundararajan Engineering College
2013 IEEE 2nd International Conference on Image Information Processing, IEEE ICIIP 2013 | Year: 2013

The existing software for circuit design and simulation require the user to be skilled either with good programming ability or 'pick and paste' model. To remove this barrier of programming knowledge, we propose a simulation model where a circuit drawn on a paper will be simulated. The circuit drawn on the paper will be fed to the computer using a scanner/camera. The image is de-noised and the nodes in the circuit are detected. All the characters, numbers and symbols alone are stored in a separate image which is used for optical character recognition. After node detection and character recognition, a netlist is compiled which is used for simulation. Applications of this simulation model include smart teaching systems, tablet app and with more research, a great deal of components including transistors and ICs can be simulated. © 2013 IEEE.

Sreerengarajan H.,Meenakshi Sundararajan Engineering College | Rajarajeswari A.K.,Meenakshi Sundararajan Engineering College | Sangita S.,Meenakshi Sundararajan Engineering College
International Journal of Applied Engineering Research | Year: 2015

Wireless technology is widely used to control industrial application nowadays mainly because of the safety it can offer to the workers there. The control system generally uses wireless communication to transmit commands between the control station and the controlled object or process. A prototype of PMDC motor which adopts a chopper based drive is used in this paper. This particular system will control the status of a PMDC motor, speed and direction of rotation (enabled by an external switch). The speed control technique is done by the PWM technique involving duty ratio control. The duty ratios can be chosen according to the user requirements, which are generated by the microcontroller, according to the required speed. The proposed design communicates with a remote control unit using Bluetooth. The logic drive is implemented using ARM7 microcontroller unit. The ARM processor houses a Bluetooth module, acting as a slave. A handheld device serves the purpose of a master. A Proportional & Integral and Fuzzy Logic Controller are made to drive the PMDC motor individually. It provides a feedback to the motor to reduce settling time. The simulation results are intended to show small ripple in rotational speed and fast response to change. © 2015 Research India Publications.

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.

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.

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.

Karthikeyan R.,Jaya Engineering College | Mahalakshmi P.,Sakthi Engineering College | Gowrishankar N.,Meenakshi Sundararajan Engineering College
2014 International Conference on Advances in Electrical Engineering, ICAEE 2014 | Year: 2014

This paper describes a novel way of using the hybrid solar and wind energy effectively for pumping solution in rural parts of India. A hybrid generation system consist photo voltaic (PV), wind turbine (WT) and Battery to supply stable power to rural residential loads. DC/DC converters are used to control the power flow to the load and Maximum Power Point Tracker (MPPT) is used for maximum power extraction from the PV and WT and to compensate power fluctuation of renewable energy. When PV and WT generate power is lower than demand power, the Battery is controlled to discharge power to complete the difference of supply and demand power. If PV and WT generate power is higher than demand power, the Battery is charged. This system uses further Wireless sensor network (WSN) for monitoring the moisture content of the soil invarious parts of the cultivation land to maintain the moisture. The system was simulated by using MATLAB/Simulink. © 2014 IEEE.

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