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      • Alternate Energy : Gravity Powered Rail Transportation Systems

        Rajaram Bojji 한국철도학회 2009 International Journal of Railway Vol.2 No.1

        A simple pendulum shows how efficient gravity is in recovering energy. Any transportation is a linearly oscillating system; every load gains kinetic energy, but loses the same to come to a stop. The Gravity Power Towers comprise of a set of vertically moving heavy masses coupled, through microprocessor controlled continuously variable gear and cable system, to a horizontally rolling unit on wheels either on rail or road. The heavy masses move vertically up against gravity gaining potential energy while stopping a moving mass; move down under gravity force, giving out energy. The Tower thus accelerates or sustains the speed a rolling unit, and while decelerating, recover the kinetic energy. Speeds of 360 kmph can be attained. Recovery of energy varies from 98.5-70%; the longer the distance between stops, the lesser is recovery. The economical, omnipresent & eternal Gravity Power grants energy independence to many a nation. Global warming reduces.

      • KCI등재

        Should Japan go Nuclear?

        ( Rajaram Panda ) 한국국방연구원 2014 The Korean Journal of Defense Analysis Vol.26 No.4

        In view of the changing security environment in Northeast Asia, stemming from China’s assertiveness in regional issues and North Korea’s nuclear weapons program, the threat perception in Japan has considerably heightened. This has triggered a debate domestically in Japan about whether it is an appropriate time to review its nuclear option as a means of deterrence. Such thinking presupposes that confidence in the U.S. extended deterrence has started eroding or has weakened. There are various political strands to this issue and there is no consensus yet reached to make the change officially possible. If Japan does indeed initiate a change in policy seriously, it would make the United States uncomfortable. But given the strong anti-nuclear sentiment in Japan, it would be difficult for any government of any party to sell the idea to the people. The domino effect of such a policy change would be seen almost immediately in South Korea and Taiwan, making Northeast Asia the world’s most nuclearized region. This would also mean the abrogation of the security alliance relationship with the United States. Given Japan’s capability in terms of capital, technology and possession of sufficient spent fuel needed for making the nuclear bomb it would be possible for Japan to make a nuclear bomb, but it would be a politically dangerous move and therefore inadvisable. Though it would remain theoretically possible, the debate would remain as an academic exercise for quite some time. This essay makes an attempt to study this complex issue as objectively as possible.

      • KCI등재

        Non-Linear Error Identifier Algorithm for Configuring Mobile Sensor Robot

        Rajaram.P,Prakasam.P 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.3

        WSN acts as an effective tool for tracking the large scale environments. In such environment, the battery life of the sensor networks is limited due to collection of the data, usage of sensing, computation and communication. To resolve this, a mobile robot is presented to identify the data present in the partitioned sensor networks and passed onto the sink. In novel data collection algorithm, the performance of the data collecting operation is reduced because mobile robot can be used only within the limited range. To enhance the data collection in a changing environment, Non Linear Error Identifier (NLEI) algorithm has been developed and presented in this paper to configure the robot by means of error models which are non-linear. Experimental evaluation has been conducted to estimate the performance of the proposed NLEI and it has been observed that the proposed NLEI algorithm increases the error correction rate upto 42% and efficiency upto 60%.

      • Design of Mobile Sensor Robot using Non-Linear Fault Recognizer Algorithm

        Rajaram.P,Prakasam Periasamy 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10

        For tracking the large scale environments, Wireless Sensor Network is an efficient tool. In such environment, restriction of battery life of the sensor networks is done because of the grouping of data, utilization of sensing, computation and communication. To determine this, a mobile robot is designed to recognize the data exist in the separated sensor networks and moved on to the sink. In new data collection technique, the outcome of the data grouping process is minimized as mobile robot can be employed in the restricted range. To improve the data collection in a varying environment, Non Linear Fault Recognizer (NLFR) algorithm has been introduced and designed in this paper to construct the robot using fault models that are non-linear. Experimental evaluation has been performed to calculate the outcome of the proposed NLFR and it has been examined that the proposed NLFR algorithm improves the fault correction rate upto 25% and efficiency upto 57%.

      • Flexible wireless power transfer module implemented with aerojet-printing and laser-sintering of rigid NiZn–ferrite ceramic films

        Rajaram, Kaveti,Kim, Jihoon Elsevier 2019 Nano energy Vol.57 No.-

        <P><B>Abstract</B></P> <P>Integrating high-performance inorganic ceramic materials into flexible electronics has long been considered a technical challenge because of the conceptual clash between rigidity and flexibility. Moreover, the inevitable high-temperature processing of ceramic materials is incompatible with other materials used in flexible electronics. To address these issues, this work suggests a novel solution to incorporate rigid NiZn–ferrite (NZF) ceramic films into a flexible wireless power transfer (WPT) module via aerojet-printing and laser-sintering processes. The aerojet-printed NZF films exhibited excellent magnetic properties after laser sintering. Although laser sintering induced unexpected microcracks in the NZF films due to the rapid heating of the laser and the high porosity of the printed films, they played an important role in imparting flexibility to the NZF films. The laser-sintered NZF (LSNZF) films were separated from the substrate using an Ag sacrificial layer and then embedded into polydimethylsiloxane (PDMS). The flexibility of the PDMS-embedded LSNZF films was investigated via a bending test. The flexible WPT receiving (Rx) module was completed by combining the PDMS-embedded LSNZF films with an inkjet-printed Ag inductor coil. The performance of the flexible WPT Rx module was verified via wireless activation of light emitting diodes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Incorporating rigid NiZn-ferrite (NZF) ceramic films into a flexible wireless power transfer (WPT) module. </LI> <LI> Aerojet-printing and laser-sintering processes of NZF films. </LI> <LI> Taking advantage of microcracks induced by the laser sintering to impart flexibility to the rigid NZF ceramic film. </LI> <LI> Employing metal sacrificial layer to separate off the fully-sintered NZF freestanding film from the substrate. </LI> <LI> WPT demonstration of the flexible power receiving module via wireless activation of light emitting diodes. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

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