1995, Sharma S.C, Murthy C.S.C, Kamath Rathnakar, Vinai Babu B.R, Satish B.M, Girish B.M.

The aluminum matrix composites with ceramic dispersoids can be separated by density difference concept. In the proposed work composite scrap is recycled using an oil fired furnace. The scrap is melted in the furnace and temperature is maintained below 740 degree centigrade. Because of the density difference the lighter dispersoids will float and heavier dispersoids will settle down. The clean melt is separated be removing the floating and settled dispersoids, and then filtering using ceramic filters.

2018, Dharani, A, Vijaylakshmi, MN, Swamy, SN

Rapid increase in the espousal of mobile phones and their ubiquity has significantly reflected upon the Intelligent Transport system (ITS). Some of the major ITS areas of usage include active traffic management, driver information, navigation information, Telematics and so on. Currently there are many apps for destination navigation systems and the navigation apps in Smartphone are more advanced and accurate than any conventional navigation devices. These apps can track location real time, guide to destinations, display maps to points of attraction and interest and even update about real time traffic conditions in some cities. This paper describes the working of location based navigation apps and analyzes the street view services in the navigation apps.

2018, Ahmed T, Madhu S, Mallabadi K.

Nanosatellite is an emerging field in satellite technology that provides low cost solution to access space and has been an area of interest in the student community. RVSAT-1, a nanosatellite incorporates an astrobiological payload that may require a very narrow operating temperature range of the order 3 to 5 C. Heaters are incorporated in the thermal design but, to meet such requirements, an effective controlled cooling mechanism is required. Radiator coupled with a louver provides a promising solution. Louvers control the amount of heat radiated through the radiator and have been consistently used in large satellites. Very little to no research is done in utilizing this fine technology in nanosatellites. In this paper, the research has been made on designing of louvers for a nanosatellite. It is made compatible with the constraints faced while incorporating it in a nanosatellite. Calculations and parameters involved in designing the actuator is explained in detail. Designing and experimental simulation analysis of Louver is focused. The deviation of obtained results from the calculations are discussed in this paper and the design is iterated with suitable changes to meet the thermal requirements of the project. Apart from the thermal control, other application of louvers is also recognized. Copyright � 2018 by the International Astronautical Federation.

2013, Fakrudeen S.P, Bheema Raju V.

The corrosion inhibition properties of AA6061 Alloy in presence of 1M Hydrochloric Acid by Schiff base compounds namely N, N'-bis (Salicylidene)-1, 4-Diaminobutane (SDB) and N, N'-bis (3-Methoxy Salicylidene)-1, 4 Diaminobutane (MSDB) as corrosion inhibitors were investigated by weight loss, Potentiodynamic polarization(PDP), electrochemical impedance spectroscopy(EIS) and scanning electron microscopy (SEM). Potentiodynamic polarization study revealed that the two Schiff bases acted as mixed type inhibitors. The change in EIS parameters is indicative of adsorption of Schiff bases on aluminium alloys surface leading to formation of protective layer. The weight loss study showed that the inhibition efficiency of these compounds increases with increase in concentration and vary with solution temperature and immersion time. The results obtained from weight loss method, Tafel extrapolation technique and electrochemical impedance spectroscopy were in good agreement. The various thermodynamic parameters were also calculated to investigate the mechanism of corrosion inhibition. The effect of methoxy group on corrosion efficiency was observed from the results obtained between SDB and MSDB. The effectiveness of these inhibitors were in the order of MSDB>SDB. The adsorption of Schiff bases on AA6061 alloy surface in acid obeyed Langmuir adsorption isotherm. The surface characteristics of inhibited and uninhibited alloy samples were investigated by scanning electron microscopy (SEM).

2006, Pruthviraj R.D, Krupakara P.V, Nagaswarupa H.P.

This research paper involves the study of Open Circuit Potential determination of the ZA-27 alloy reinforced with Sic particulate. MMC composites are prepared by liquid melt metallurgy technique using vortex method. Composites containing 2,4,6 weight percentage of Sic particulates of 60-80micro meter since they are prepared according to ASTM standards. Rectangular specimen of 2cm length and 1cm breadth is prepared. 1sq.cm is exposed to corrosive medium, they are subjected to Open Circuit Potential study using multimeter and calomel electrode. The potential observed for 2%,4%,6% composites were less than the potential of matrix alloy for a range of 96hrs. � 2006 SAEST.

2015, Nagesha, C, Sreedevi, A, Gopal, M

DC-DC converters are mainly used to provide required output voltage by suitably controlling the pulse width modulated (PWM) signal given to the gate of the fast acting power electronics switches. Flyback converter is one such popular isolated DC-DC converter topology used to obtain regulated output voltage in low power applications. They are used as power supply systems in space technology and in many other industrial power electronics systems, where having constant voltage is very much essential. This paper presents Simulation and practical implementation of multiple output Flyback converter with Silicon Carbide (SIC) MOSFET as switching device. The designed Converter is observed to have a good output voltage regulation and higher efficiency for the wide input voltage range.

2018, Neeta Shivakumar, Pushpa Agrawal

The effect of chemical mutagens like ethyl methane sulphonate (EMS), sodium azide (SA) and colchicines in different concentrations upon the morphological characters of ginger (Zingiber officinale) was studied. Wide genetic variation is needed in plant breeding in order to search ideal plant types during the process of selection. Induced mutations and various biotechnological tools continue to be in great demand to create the variations and screen the mutants respectively. To study the effect of chemical mutagens three wild and indigenous varieties of ginger in India namely Bidar, Himachal and Humnabad were used. The three months plants of the mutant varieties were studied with respect to various growth parameters like survival percentage, sprouting percentage, plant height, number of tillers, etc. The data collected was analyzed and significant variations were observed in the growth parameters between the mutant and wild varieties. It was found that the treatment with chemical mutagens had significant effect on all the growth parameters. � Global Science Publications.

2001, Rao, UKA

In this paper ive present a methodology for an Efficient Signature Verification scheme using the Hidden Markov Model (HMM) for verification. The method is memory and computation time efficient. One of the primary, goals in the development of this system is to facilitate real-time operation. We usc the Baum-Welch Algorithim for training the HMM and the Viterbi Algorithm for the testing of our Proposed system. It may be noted that the technique of HMMs have hitherto been applied for speech modelling and only recently has its application to the field of Signature Verification been considered. Our proposed system has an overall accuracy of 11.64% FAR and 0.64% FRR.

2006, Nagaraj T.S, Udayashanker B.C, Shashishankar A, Pradeep H.R.

Controlled low-strength materials (CLSM), also known as flowable fills are self compacting cementitious slurries capable of developing required low levels of strength in the range of 1 to 10 MPa. These are essentially cement-based materials along with combination of fly ash and ground granulated blast furnace slag (GGBS). The fine aggregate constitutes, apart from sand, other marginal materials such as rock dust, foundry waste sand, ponded or bottom ash and such other materials. The water-cementitious materials ratio varied from 0.7 to 2.5 with intermediate values being 1.0 and 1.6. In this investigation a phenomenological model is formulated within the basic framework of Abrams' law for cement and fly ash as cementitious materials. This model is validated with another independent set of experimental data for tertiary combination of cement, fly ash and GGBS as multi-component cementing materials. The fine aggregate used in all the cases was rock dust. The specific advantage of this phenomenological model is to get the range of water-cementitious materials ratio required for the wide spectrum of strength requirement with the input strength data at a reference value of water-cementitious materials ratio.

2012, Gopinath R, Venugopal N, Varun M, Yatish Y.

In the present investigation, the scope of commercially available powdered activatedcarbon (adsorbent) and water hyacinth (absorbent) as alternative cost-effective and efficient treatment methodologies have been warranted for a simulated aqueous environment. Thepresent sorption studies were carried out in the batch reactors under control conditions such as contact time, pH, initial adsorbent concentration and adsorbent dosage. While water hyacinth as an absorption media indicated economic viability, isotherm analysis indicated adsorption by activated carbon as an excellent alternative and reliable technique forCr (VI) removal.